WO2020152216A1 - Compositions de detergence avec des propriétés olfactives améliorées - Google Patents
Compositions de detergence avec des propriétés olfactives améliorées Download PDFInfo
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- WO2020152216A1 WO2020152216A1 PCT/EP2020/051506 EP2020051506W WO2020152216A1 WO 2020152216 A1 WO2020152216 A1 WO 2020152216A1 EP 2020051506 W EP2020051506 W EP 2020051506W WO 2020152216 A1 WO2020152216 A1 WO 2020152216A1
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- Prior art keywords
- composition
- emulsion
- poly
- microcapsules
- solid
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/50—Perfumes
- C11D3/502—Protected perfumes
- C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/16—Interfacial polymerisation
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/22—Carbohydrates or derivatives thereof
- C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/12—Soft surfaces, e.g. textile
Definitions
- TITLE DETERGENCE COMPOSITIONS WITH IMPROVED OLFACTORY PROPERTIES
- compositions in particular intended for detergency, washing and / or laundry care, comprising microcapsules, and having improved olfactory properties.
- Scent is one of the primary buying factors for laundry care products such as detergents and fabric softeners today.
- the sensory characteristics appreciated by the consumer are a pleasant and fresh smell imparted to the laundry in a persistent and prolonged manner.
- perfumes are volatile substances that tend to evaporate quickly in the detergent or fabric softener bottle before they have been able to transmit a pleasant smell to the laundry.
- perfumes as predominantly hydrophobic substances, adhere very little to laundry due to the surfactants also present in laundry care products. A large part of the perfume contained in a detergent or a softener is therefore lost, either by evaporation or by washing, without being able to attach to the laundry and perfume it.
- the benefit provided by the polymer envelope coating the perfume in a microcapsule is manifold.
- the polymer shell helps limit the rate of evaporation of the fragrance.
- the affinity of the polymer shell for the materials that make up the fabric fibers allows the microcapsules to attach to these fibers, thereby fixing the scent on the laundry.
- the microcapsules provide a prolonged scenting effect to the laundry, by breaking progressively by mechanical effect when the laundry is worn to gradually release the fragrance.
- microcapsules have therefore made it possible to improve the olfactory performance of detergents and softeners while reducing the quantity of perfume contained in these products and therefore their cost.
- manufacturers are now facing increasing environmental constraints and are seeking to make their products biodegradable.
- Current microcapsules a source of non-biodegradable microplastics, are a major brake on this dynamic.
- the microcapsules mainly used in detergents and softeners are produced by interfacial emulsion polymerization of a compound of the formaldehyde family with a compound of the melamine family.
- compositions of washing and / or laundry care products are in particular detailed in applications US 2013/0203642, US 7 1 19 057, WO 2015/031418, US 2015/0252312 and US 2016/177241.
- These capsules have the correct performance of protecting the perfume against evaporation and prolonged perfuming of the laundry, but are not biodegradable.
- Biodegradable alternatives have been developed, such as non-polymerized matrix type microcapsules based on cellulose, polycaprolactone or polyvinylpyrrolidone, in particular described in applications CN106614564 or US 2015/265541.
- these microcapsules are very porous and the properties they could provide in terms of protecting perfume against evaporation and scenting the laundry are insufficient.
- microcapsules which are biodegradable while still improving the prolonged fragrance properties of the laundry.
- the aim of the present invention is therefore to provide a composition intended in particular for washing and / or caring for laundry, containing biodegradable microcapsules and making it possible to impart a pleasant and prolonged odor to the laundry.
- the object of the present invention is also to provide a detergency product which confers a pleasant and prolonged odor on the laundry, and exhibits less evaporation of perfume compared with current products containing microcapsules.
- Another object of the present invention is to provide a detergency product which is biodegradable and confers a pleasant and prolonged odor on the laundry.
- the present invention relates to a composition
- a composition comprising:
- a core consisting of a C1 composition comprising at least one perfuming agent
- solid envelope of crosslinked polymer completely encapsulating the core at its periphery, said solid envelope comprising a crosslinked polymer obtained by polymerization of at least one monomer or polymer bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, epoxy, siloxane, amine, lactone, phosphate and carboxylate functions,
- the thickness of the solid shell is between 0.1 ⁇ m and 20 ⁇ m, preferably between 0.2 ⁇ m and 8 ⁇ m, and preferably between 0.2 ⁇ m and 5 ⁇ m.
- the present invention relates to a composition
- a composition comprising:
- composition C1 comprising at least one perfuming agent, said composition C1 being in the form of an emulsion, and
- a solid shell of crosslinked polymer completely encapsulating the core at its periphery said solid shell comprising a crosslinked polymer obtained by polymerization of at least one monomer or polymer carrying at least one reactive function chosen from the group consisting of acrylate and methacrylate functions, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate, and carboxylate, and in which the thickness of the solid shell is between 0.1 ⁇ m and 20 ⁇ m, preferably between 0.2 ⁇ m and 8 ⁇ m, and preferably between 0.2 ⁇ m and 5 ⁇ m.
- the inventors have found that by combining a detergency product formulation such as a detergent or a softener well known from the state of the art with microcapsules of crosslinked polymers such as crosslinked polyesters, crosslinked polyepoxys or crosslinked polyurethanes, the resulting detergency product exhibits the following properties:
- the composition according to the invention consists in combining both a composition usually intended for washing and / or caring for laundry, but not containing microcapsules, as detailed below, with biodegradable microcapsules whose core contains a perfuming agent.
- the microcapsules do not include a laundry and / or laundry care composition.
- the core of the microcapsules used according to the invention does not include any softener, detergent or any detergency product.
- the present invention consists in particular in using biodegradable microcapsules, the core of which contains a perfuming agent to improve the olfactory properties of washing and / or laundry care compositions such as detergents and softeners.
- microcapsules and “capsules” are used interchangeably.
- compositions of the invention comprise a composition for washing and / or caring for laundry.
- compositions for washing and / or caring for laundry are chosen from compositions well known in the state of the art intended for cleaning and maintaining laundry, but also for bleaching it, for reducing its crumpled appearance, for making it lighter. soft, to facilitate ironing, to prevent abrasion or pilling.
- compositions do not include (micro) capsules.
- the washing and / or laundry care compositions are laundry compositions, in particular liquid, powder or tablet laundry compositions.
- the laundry and / or laundry care compositions of the present invention are preferably laundry compositions, in particular main wash (fabric wash) compositions or rinse-added softening compositions, especially as described in the applications.
- Main wash compositions can include a fabric softening agent and rinse-added fabric softening compositions can include surfactant compounds, particularly nonionic surfactant compounds.
- surfactant used in the detergent composition.
- different surfactant systems can be chosen, such as those skilled in the art are well aware, for example to adapt to different types of laundry or washing machines.
- the total amount of surfactant present also depends on the intended end use and can be up to 60% by weight, for example in a composition for washing fabrics by hand. In compositions for machine washing fabrics, an amount of 5 to 40% by weight is generally suitable.
- the laundry and / or laundry care compositions used according to the present invention comprise at least 2% by weight of surfactant, preferably 2% to 60%, especially 15% to 40%, and preferably 25 % to 35% by weight relative to the total weight of the composition.
- Detergent compositions suitable for use in most automatic washing machines generally contain an anionic surfactant without soap, or a nonionic surfactant, or combinations of the two in any suitable ratio, optionally with soap.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one surfactant, in particular chosen from anionic, cationic, nonionic, amphoteric and zwitterionic surfactants and their mixtures, and in particularly as described in detail in the literature, for example, in "Surfaces active Agents and Detergents", volumes I and II, by Schwartz, Perry and Berch.
- the compositions for washing and / or caring for the laundry used according to the invention comprise at least one anionic surfactant, in particular chosen from linear alkylbenzenesulphonates, in particular linear alkylbenzenesulphonates having an alkyl chain length of C8 to C16.
- anionic surfactant in particular chosen from linear alkylbenzenesulphonates, in particular linear alkylbenzenesulphonates having an alkyl chain length of C8 to C16.
- the content of these surfactants is between 0% by weight and 40% by weight, in particular between 1% by weight and 25% by weight, and preferably between 2% by weight and 15% by weight, relative to the weight total of said composition.
- ammonium salts of saturated or unsaturated fatty acids having from 12 to 18 carbon atoms Mention may also be made, as anionic surfactants, of the alkaline salts of saturated or unsaturated fatty acids having from 12 to 18 carbon atoms, the salts of sulfuric acid semi-esters of fatty alcohols having from 12 to 18 carbon atoms.
- nonionic surfactants having a low degree of ethoxylation
- primary and secondary alkyl sulphates in particular branched chain and random C8 to C15 primary alkyl sulphates; secondary (2,3) C10 to C18 alkyl sulphates; alkyl ether sulfates; sulfated fatty alcohol ethoxylates (AES), preferably alkylalkoxy alkyl sulfates; C10 to C18 alkylalkoxycarboxylates; mid-branched alkyl sulphates chain; mid-chain branched alkyl alkoxy sulfates; modified alkylbenzenesulfonates; methyl ester sulfonates; olefin sulfonates; alkyl xylene sulfonates; dialkyl sulfosuccinates; and sulfonate esters of fatty acids
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one nonionic surfactant.
- nonionic surfactants mention may be made, for example, of ethoxylates or propoxylates of alkylglycosides and / or of primary and secondary alcohols, in particular ethoxylated C8 to C20 aliphatic alcohols with an average of 1 to 20 moles of oxide.
- ethylene per mole of alcohol, and ethoxylated primary and secondary aliphatic alcohols C10 to C15; C6-C12 alkyl phenol alkoxylates in which the alkoxylate units are a mixture of ethyleneoxy and propyleneoxy units; condensates of C12 to C18 alcohol and C6 to C12 alkylphenol with ethylene oxide / propylene oxide block alkyl polyamine ethoxylates; alkylpolysaccharides; polyhydric fatty acid amides; and alkoxylated ester surfactants such as fatty methyl ester ethoxylates (MEE).
- MEE fatty methyl ester ethoxylates
- nonionic surfactants such as alkylpolyglycosides, glycerol monoethers and polyhydroxyamides (glucamide), products of ethoxylation and / or propoxylation of N-alkylamines, vicinal diols, fatty acid esters and fatty acid amides.
- non-ethoxylated nonionic surfactants such as alkylpolyglycosides, glycerol monoethers and polyhydroxyamides (glucamide), products of ethoxylation and / or propoxylation of N-alkylamines, vicinal diols, fatty acid esters and fatty acid amides.
- Such surfactants can be present in these compositions in contents of between 0% and 40% by weight, preferably between 1% and 25% by weight, and preferably between 2% and 15% by weight relative to the total weight of said composition.
- the laundry and / or laundry care compositions used according to the invention comprise at least one amphoteric surfactant.
- amphoteric surfactants there may be mentioned, for example, derivatives of secondary and tertiary amines, derivatives of heterocyclic secondary and tertiary amines, or derivatives of quaternary ammonium, quaternary phosphonium or tertiary sulfonium compounds, such as betaine, including alkyl dimethylbetaine and cocodimethylamidopropylbetaine, oxides of C8 to C18 amines and sulfo- and hydroxybetaines, such as N-alkyl-N, N-dimethylammino-1 -propanesulfonate where an alkyl group may be in C8 to C18 or in C10 to C14; water-soluble amine oxides, such as C10 to C18 alkyl dimethyl amine oxide or C8 to C12 alkoxy ethyl dihydroxyethyl oxide.
- betaine including alkyl dimethylbetaine and cocodimethylamidopropylbetaine, oxide
- composition for washing and / or caring for the laundry when the composition for washing and / or caring for the laundry is a softening composition, said composition contains at least one cationic softening compound intended to soften the laundry.
- cationic surfactants such as salts based on quaternary ammonium whose solubility in water is less than 1 x 10 _3 % by weight in demineralized water at 20 ° C, comprising a single long alkyl or alkenyl chain having an average length greater than or equal to C20 or more; preferably, compounds comprising a polar head group and two alkyl or alkenyl chains having an average chain length greater than or equal to C14.
- these compounds have two long alkyl or alkenyl chains, each having an average length greater than or equal to C16.
- the alkyl or alkenyl groups have a chain length of C18 or greater. It is preferable that the long chain alkyl or alkenyl groups are predominantly linear.
- distearyldimethyl ammonium chloride and di (hardened tallow alkyl) dimethyl ammonium chloride, di (sulfoxyloxyethyl) dimethyl ammonium chloride and / or its tallow analogue triethanolamine derivatives (TEA quats) such as N-methyl-N, N, N-triethanolamine tallow diester or tallow diester quaternary ammonium chloride or tallow diester methosulphate.
- TAA quats triethanolamine derivatives
- said composition for washing and / or caring for the laundry is a softening composition
- said composition contains at least one biodegradable cationic compound which softens fabrics such as materials based on biodegradable quaternary ammonium, for example. 1,2-bis (hardened sulfoyloxy) -3-trimethylammonium propane chloride as described in US Pat. No. 4,137,180.
- these materials include small amounts of the corresponding monoester, for example sulfoyloxy-2-hydroxy chloride -3- hardened trimethylammonium propane.
- alkylpyridinium salts substituted imidazoline species, primary, secondary and tertiary amines and condensation products of fatty acids with alkylpolyamines.
- Such cationic compounds can be present in these compositions in contents of from 0.5% to 35%, preferably from 1% to 30%, more preferably from 3% to 25% by weight relative to the total weight of the composition. .
- said composition for washing and / or caring for the laundry is a softening composition
- said composition contains at least one water-soluble cationic fabric softening compound such as those described in GB 2 039 556.
- said composition for washing and / or caring for the laundry is a softening composition
- said composition contains at least one nonionic fabric softening compound, such as lanolin and its derivatives, lecithins and other phospholipids.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one stabilizing agent, the purpose of which is in particular to suspend and stabilize the microcapsules.
- stabilizing agent By way of stabilizing agent, mention may be made of any known ingredient capable of suspending particles and / or of adjusting the rheology of a liquid composition, in particular crystalline materials containing a hydroxy group, polyacrylates, polycarboxylates, salts of alkali metal, alkaline earth metal salts, ammonium salts, alkanolammonium salts, C12 to C20 fatty alcohols, derivatives of di-benzylidene polyol acetate (DBPA), cationic polymers comprising a first structural unit derived from methacrylamide and a second derived structural unit diallyldimethylammonium chloride, and a combination thereof.
- DBPA di-benzylidene polyol acetate
- linear C8 to C22 alcohols alkoxylated with 10 to 20 moles of alkylene oxide, C10 to C20 alcohols or mixtures thereof.
- Other stabilizing agents include deflocculating polymers as described in EP 0 415 698 and EP 0 458 599.
- the nonionic stabilizing agent is a linear C8 to C22 alcohol, alkoxylated with 10 to 20 moles of d-oxide. alkylene.
- Gums and other polysaccharides can also advantageously be used, for example gellan gum, carrageenan gum, xanthan gum, polyvinyl alcohol and its derivatives, cellulose and its derivatives, including cellulose ethers and cellulose ethers.
- cellulose esters and tamarind gum including, for example, xyloglucan polymers), guar gum, locust bean gum.
- fatty acids and fatty waxes for example C8 to C24 alkyl or alkenyl monocarboxylic acids or their polymers, and castor oil and its derivatives.
- saturated fatty acids are used, in particular C16 to C18 hardened tallow fatty acids.
- the fatty acid is unsaponified, more preferably the fatty acid is free, for example oleic acid, lauric acid or tallow fatty acid.
- Such stabilizers can be present in these compositions in contents of from 0.1% to 10% by weight, in particular from 0.5% to 5% by weight, and preferably from 1% to 4% by weight relative to the total weight of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one inorganic adjuvant improving the detergency properties of the product, such as sodium carbonate, optionally in combination with a germ crystallization for calcium carbonate, crystalline and amorphous aluminosilicates such as zeolites, inorganic phosphates and polyphosphates, such as sodium orthophosphate, pyrophosphate and tripolyphosphate.
- inorganic adjuvant improving the detergency properties of the product such as sodium carbonate
- a germ crystallization for calcium carbonate such as crystalline and amorphous aluminosilicates
- zeolites such as zeolites
- inorganic phosphates and polyphosphates such as sodium orthophosphate, pyrophosphate and tripolyphosphate.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one organic detergency adjuvant such as polycarboxylic acids, in particular citric acid, adipic acid, l.
- succinic acid glutaric acid, malic acid, tartaric acid, malaric acid, fumaric acid and saccharic acids, monomeric and polymeric aminopolycarboxylic acids, in particular methylglycinediacic acid, nitrilotriacetic and ethylenediaminetetraacetic acid and polyaspartic acid, polyphosphonic acids, in particular aminotris acid (methylene phosphonic acid), ethylenediaminetetrakis compounds (methylene phosphonic acid) and polymeric acids such as dextrin (poly), polymeric acrylic acids, methacrylic acids, maleic acids and their polymer mixtures. All the acids indicated are generally used in the form of their water soluble salts, in particular their alkali salts.
- organic detergency adjuvants are present in contents of from 0.5% to 25% by weight, preferably from 1% to 10% by weight relative to the total weight of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one organic detergency adjuvant of polycarboxylate monomer type such as citrates, gluconates, oxydisuccinates, mono- , glycerol di- and trisuccinates, carboxymethyloxy succinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates and sulfonated fatty acid salts.
- polycarboxylate monomer type such as citrates, gluconates, oxydisuccinates, mono- , glycerol di- and trisuccinates, carboxymethyloxy succinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates and sulfonated fatty acid salts.
- organic detergency adjuvants are present in contents of from 5% to 30% by weight, preferably from 10% to 25% by weight relative to the total weight of the composition.
- the compositions for washing and / or caring for the laundry used according to the invention comprise at least one peroxy bleaching compound, for example inorganic persalts or organic peroxyacids, capable of producing hydrogen peroxide in aqueous solution.
- Suitable peroxy bleach compounds include organic peroxides such as urea peroxide and inorganic persalts such as perborates, percarbonates, perphosphates, persilicates and metal persulfates. alkaline.
- such peroxy bleaching compounds are present in contents of from 0.1% to 35% by weight, preferably from 0.5% to 25% by weight relative to the total weight of the composition.
- the laundry and / or laundry care compositions used according to the invention comprise at least one bleach activator or precursor which can be used together with the bleach compound to improve the bleaching action.
- low washing temperatures such as catalytic metal complexes, precursors of peroxycarboxylic acid, more particularly precursors of peracetic acid and precursors of pernoanoic acid, for example N, N, N ', N '-tetracetyl ethylenediamine (TAED), sodium nonanoyloxybenzenesulphonate (SNOBS), octanoylcaprolactam, benzoyloxybenzenesulphonate, nonanoyloxybenzene-isulphonate, benzoylvalerolactolactam, methyl dodrylobenzylacanate.
- a peroxyacid can be used, such as imido peroxycarboxylic peracids, phthalimido peroxycaproic acid (PAP).
- such bleach activators or precursors are present in amounts of from 0.1% to 8% by weight, preferably from 0.5% to 5% by weight relative to the total weight of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one bleach stabilizer (sequestering transition metals) such as ethylenediamine tetraacetate (EDTA), polyphosphonates such as Dequest (registered trademark) and non-phosphate stabilizers such as EDDS (ethylenediamine di-succinic acid).
- bleach stabilizer such as ethylenediamine tetraacetate (EDTA), polyphosphonates such as Dequest (registered trademark) and non-phosphate stabilizers such as EDDS (ethylenediamine di-succinic acid).
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one enzyme such as those of the class of proteases (in particular subtilisins), cutinases, amylases, pullulanases, hemicellulases, cellulases, hemicellulases, mannanases, enzymes separating pectin, tannases, xylanases, xanthanases, ⁇ -glucosidases, carrageenases, perhydrolases, oxidases, oxidoreductases, lipases and peroxidases, as well as their mixtures.
- proteases in particular subtilisins
- cutinases amylases
- pullulanases hemicellulases
- cellulases hemicellulases
- mannanases mannanases
- the enzymatic active substances obtained from fungi or bacteria such as Bacillus subtilis, Bacillus licheniformis, Streptomyces griseus, Humicola lanuginosa, Humicola insolens, Pseudomonas pseudoalcaligenes or Pseudomonas cepacia are particularly suitable.
- the enzymes optionally used can be adsorbed on carrier substances and / or incorporated into encapsulating substances in order to protect them from premature inactivation.
- such enzymes are present in amounts ranging from about 0.1% to about 3.0% by weight relative to the total weight of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one powder structuring agent, such as a fatty acid (or a fatty acid soap), a sugar, an acrylate or acrylate / maleate copolymer, or sodium silicate.
- a powder structuring agent such as a fatty acid (or a fatty acid soap), a sugar, an acrylate or acrylate / maleate copolymer, or sodium silicate.
- such powder structuring agents are present in contents of from 1% to 5% by weight relative to the total weight of the composition.
- the laundry and / or laundry care compositions used according to the invention may further comprise other additives such as soil release polymers; inorganic salts such as sodium sulfate or sodium hydroxide; dyes; and decoupling polymers.
- additives such as soil release polymers; inorganic salts such as sodium sulfate or sodium hydroxide; dyes; and decoupling polymers.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one free, that is to say non-encapsulated, perfuming agent.
- perfuming agents are well known to those skilled in the art and include in particular those mentioned, for example, in S. Arctander, Perfume and Flavor Chemicals (Montclair, NJ, 1969), S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, NJ, 1960), in the list of the International Fragrance Association (IFRA http://www.ifraorg.org/en/ingredients) and in "Flavor and Fragrance Materials", 1991 (Allured Publishing Co. Wheaton, III. USA).
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one antifoam, such as a silicone or paraffin oil.
- such defoamers are present in contents of from 0.05% to 4% by weight, preferably from 0.1% to 3% by weight, and in particular from 0.2% to 1% by weight per weight. relative to the total weight of the composition.
- the compositions for washing and / or caring for the laundry used according to the invention comprise at least one degreasing agent or anti-redeposition agent such as nonionic cellulose ethers such as methylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose , polymers of phthalic acid and / or terephthalic acid, in particular polymers of ethylene terephthalates and / or polyethylene glycol terephthalates or their derivatives modified anionically and / or nonionically, and preferably in a content of between 0 and 5% by weight relative to the total weight of the composition.
- degreasing agent or anti-redeposition agent such as nonionic cellulose ethers such as methylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose , polymers of phthalic acid and / or terephthalic acid, in particular polymers of ethylene terephthalates and / or polyethylene glycol terephthalates or their derivatives modified anionically and / or nonionically
- the compositions for washing and / or caring for the laundry used according to the invention comprise at least one color transfer inhibitor or anti-discoloration agent, such as the derivatives of polyvinylpyrrolidone (PVP), of polyvinylimidazole (PVI), copolymers of vinylpyrrolidone and vinylimidazole (PVP / PVI), polyvinylpyridine-N-oxide, poly-N-carboxymethyl-4-vinylpyridium chloride, polyethylene glycol-copolymer of vinylpyrrolidone and vinylimidazole, and their mixtures, preferably in a content of between 0 and 2% by weight relative to the total weight of the composition.
- PVP polyvinylpyrrolidone
- PV polyvinylimidazole
- PV copolymers of vinylpyrrolidone and vinylimidazole
- PVP / PVI polyvinylpyridine-N-oxide
- the compositions for washing and / or caring for the laundry used according to the invention comprise at least one optical brightener, which can include any compound exhibiting fluorescence, including compounds which absorb UV light and re-emit it. as visible "blue” light.
- optical brighteners include: stilbene, 4,4'-diaminostilbene, biphenyl, distyrylbiphenyl derivatives, five-membered heterocycles such as triazoles, pyrazolines, oxazoles, imidiazoles, or six-membered heterocycles (such as coumarins, naphthalamides, s-triazines).
- optical brighteners are present in contents of from 0 to 0.4%, in particular from 0.1% to 0.3% by weight relative to the total weight of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise at least one non-aqueous solvent, such as monohydric or polyhydric alcohols, alkanolamines or glycol ethers, provided that they are miscible with water within the specified concentration range.
- non-aqueous solvent such as monohydric or polyhydric alcohols, alkanolamines or glycol ethers, provided that they are miscible with water within the specified concentration range.
- the solvents are chosen from ethanol, n-propanol, isopropanol, butanols, glycol, propanediol, butanediol, methylpropanediol, glycerol, diglycol, propyldiglycol, butyl diglycol, l 'hexylene glycol, ethylene glycol, ethylene glycol, ethylene glycol and ethylene glycol, propylene ether of ethylene glycol, mono-n-butyl ether of ethylene glycol, methyl ether of diethylene glycol, ether diethylene glycol ethyl, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol propyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, methoxy triglycol, ethoxy triglycol, butoxy triglycol, 1 - butoxy
- non-aqueous solvents are present in contents of from 0 to 25% by weight, preferably from 1% to 20% by weight, and in particular from 2% to 15% by weight, relative to the total weight. of the composition.
- compositions for washing and / or caring for the laundry used according to the invention comprise water.
- compositions of the invention comprise at least one solid microcapsule as defined above.
- compositions of the invention comprise several solid microcapsules, that is to say a series or a set of solid microcapsules, all identical or different.
- microcapsules of the invention are referred to as solid microcapsules due to the solid nature of the crosslinked polymer shell.
- the solid microcapsules of the invention comprise a liquid (non-solid) core.
- the microcapsules used according to the invention in view of the choice of specific monomers and polymers, have the ability to be biodegradable.
- Biodegradability is defined here as the ability to be degraded in a natural environment, as defined in the OECD guidelines: OECD 301 (Easy biodegradability), namely OECD 301 A (Carbon disappearance test
- DOC Dissolved Organic
- OECD 301 B CO2 emission test
- OECD 301 C Modified MITI test (I)
- OECD 301 D Click-through test
- OECD 301 E Modified screening test from 'OCDE
- OCDE 301 F Manometric respirometry test
- OCDE 304A Intrinsic biodegradability in soil
- OECD 306 Biodegradability in seawater
- OECD 310 Immediate biodegradability - release of CO2 in flasks hermetically sealed.
- microcapsules according to the invention are characterized in that they comprise a core comprising at least one perfuming agent, said perfuming agent being different from the composition for washing and / or caring for laundry.
- the aforementioned washing and / or laundry care composition and the solid microcapsules are different entities.
- the composition of the invention comprises a set of solid microcapsules, each of said solid microcapsules being as defined above, and in which the standard deviation of the distribution of the diameter of the microcapsules is less than 50%. , in particular less than 25%, or less than 1 ⁇ m.
- the size distribution of the solid microcapsules can for example be measured by image analysis technique of microcapsules taken or optical microscope or by light scattering technique using a Mastersizer 3000 (Malvern Instruments) equipped with a Hydro SV measuring cell.
- Composition C1
- composition C1 is in the form of an emulsion, it therefore comprises a continuous phase and a dispersed phase.
- composition C1 as defined above of the core of solid microcapsules comprises at least 20% by weight of perfuming agent relative to the total weight of said composition C1, and preferably from 25% to 60% , and preferably from 30% to 50% by weight relative to the total weight of said composition C1.
- composition C1 further comprises at least one gelling agent.
- Said gelling agent can be chosen from the group of water-soluble or water-dispersible polymers comprising in particular aqueous, preferably chosen from the group consisting of:
- cellulose ethers such as cellulose ethers: methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose or methyl hydroxypropyl cellulose;
- polyacrylates also called carbomers
- PAM polyacrylic acid
- PMAA polymeth acrylic acid
- HPEMA poly (hydroxyethyl methacrylate)
- HPMA poly (N-2-hydroxypropyl methacrylate)
- PNIPAM poly (N-isopropylacrylamide)
- PVP polyvinylpyrrolidone
- PVA polyvinyl alcohol
- poly (ethylene glycol), poly (propylene glycol) and their derivatives such as poly (ethylene glycol) acrylate / methacrylate, poly (ethylene glycol) diacrylate / dimethacrylate, polypropylene carbonate;
- polysaccharides such as carrageenans, locust bean gums or tara gums, dextran, xanthan gums, chitosan, agarose, hyaluronic acids, gellan gum, guar gum, arabic gum, tragacanth , diutan gum, oat gum, karaya gum, ghatti gum, curdlan gum, pectin, konjac gum, starch;
- - protein derivatives such as gelatin, collagen, fibrin, polylysine, albumin, casein;
- Said gelling agent can also be chosen from the group of solid particles such as clays, silicas and silicates which can be used as gelling agent when they are dispersed in water.
- composition C1 As solid particles which can be used in composition C1 as gelling agent, mention may be made of clays and silicates belonging in particular to the category of phyllosilicates (also called sheet silicas).
- silicates which can be used in the context of the invention, mention may be made of Bentonite, Hectorite, Attapulgite, Sepiolite, Montmorillonite, Saponite, Sauconite, Nontronite, Kaolinite, Talc. , Sepiolite, Chalk. Synthetic pyrogenic silicas can also be used.
- the clays, silicates and silicas mentioned above can advantageously be modified by organic molecules such as polyethers, ethoxylated amides, quaternary ammonium salts, long chain diamines, long chain esters, polyethylene glycols, polypropylene glycols.
- said gelling agent is chosen from the group consisting of cellulose derivatives, polyacrylates, poly (ethylene glycol) derivatives and synthetic silicas.
- composition C1 comprises between 0.1% and 30% by weight of gelling agent, preferably between 0.5% and 20%, more preferably between 0.5% and 10%.
- composition C1 comprises between 30% and 70% by weight of water, preferably between 35% and 65%, and more preferably between 35% and 60%.
- composition C1 further comprises at least one surfactant, in particular chosen from anionic, cationic, amphoteric and nonionic surfactants.
- surfactants mention may be made, for example, of oxyethylenated / oxypropylenated block polymers such as poloxamers; sorbitan fatty acid esters and their oxyethylenated derivatives, such as sorbitan monostearate, sorbitan monopalmitate, oxyethylenated sorbitan stearates, palmitates and oleates; derivatives of polyethylene glycol and of a mixture of glycerides (mono-, di- and tri-glycerides) of caprylic acid and capric acid; alkylpolyglycosides and in particular alkylpolyglucosides such as caprylyl / capryl glucoside or laurylglucoside.
- composition C1 further comprises at least one agent for correcting the hydrophobicity of the perfume.
- agents are hydrophobic materials whose ClogP is greater than 4, preferably greater than 6, and having good miscibility with the perfumes used.
- mono-, di and tri-glyceride oils such as capric / caprylic triglycerides; fatty acid esters of polyglycerol, polyethylene glycol, polypropylene glycol and polybutylene glycol oligomers; nonionic fatty alcohol alkoxylates such as isopropyl myristate, diethyl phthalate, dibutyl phthalate, diisodecyl adipate; mineral oils; silicone oils such as polydimethylsiloxane and polydimethylcyclosiloxane; diethyl phthalate; polyalphaolefins; Castor oil.
- composition C1 is in the form of a nanoemulsion in which the continuous phase is an aqueous gel.
- the average diameter of the drops of said nanoemulsion is between 50 nm and 5 ⁇ m, preferably between 100 nm and 3 ⁇ m, and preferably between 100 nm and 1 ⁇ m.
- composition C1 is in the form of an emulsion in which the continuous phase is an aqueous gel.
- the average diameter of the drops of said emulsion is between 50 nm and 5 ⁇ m, preferably between 100 nm and 3 ⁇ m, and preferably between 100 nm and 1 ⁇ m.
- a determining parameter for limiting the evaporation of the perfuming agent from the microcapsules is the stability over time of the emulsion of composition C1, that is to say that the size distribution changes greatly. little in time.
- a gelling agent is particularly advantageous since it makes it possible to slow down the coalescence of the drops of emulsion.
- composition C1 comprises at least one perfuming agent.
- composition C1 according to the invention may comprise a single perfuming agent (or single perfume) or a mixture of several perfuming agents (or a mixture of several perfumes).
- perfumes or fragrances are well known to those skilled in the art and include in particular those mentioned, for example, in S. Arctander, Perfume and Flavor Chemicals (Montclair, NJ, 1969), S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, NJ, 1960), in the list of the International Fragrance Association (IFRA http://www.ifraorg.org/en/ingredients) and in "Flavor and Fragrance Materials", 1991 (Allured Publishing Co. Wheaton, III. USA ).
- the perfumes used in the context of the present invention can include natural products such as extracts, essential oils, absolutes, resinoids, resins, concretes, etc ... as well as basic synthetic substances such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acids, esters, acetals, ketals, nitriles, etc ... including compounds, saturated and unsaturated, aliphatic, alicyclic and heterocyclic compounds.
- the perfuming agent comprises less than 10%, or even less than 7.5%, by weight of compound (s) with a ClogP of less than 2.1, relative to the total weight of said perfuming agent. According to one embodiment, the perfuming agent does not include a compound with a ClogP of less than 2.1.
- the aforementioned solid microcapsules comprise a solid shell entirely composed of crosslinked polymer as defined above.
- the aforementioned solid shell is formed of a crosslinked polymer obtained by polymerization of at least one monomer or polymer bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester functions , thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate, and carboxylate.
- the term "monomer” or “polymer” denotes any basic unit suitable for the formation of a solid material by polymerization, either alone or in combination with other monomers or polymers.
- the term “polymer” also encompasses oligomers.
- the crosslinked polymer is obtained by polymerization from a monomer or polymer chosen from aliphatic or aromatic esters or polyesters, urethanes or polyurethanes, anhydrides or polyanhydrides, saccharides or polysaccharides, ethers or polyethers, amides or polyamides, and carbonates or polycarbonates, said monomers or polymers additionally bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether functions , N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate, and carboxylate.
- a monomer or polymer chosen from aliphatic or aromatic esters or polyesters, urethanes or polyurethanes, anhydrides or polyanhydrides, saccharides or polysaccharides, ethers or polyethers, amides or polyamides, and carbonates or polycarbonates
- said monomers or polymers additionally bearing at least
- polyglycolides PGA
- polylactides PLA
- poly (lactide-co-clycolide) PLGA
- poly (ortho esters) such as for example polycaprolactone (PCL) ), polydiaxanone, poly (ethylene succinate), poly (butylene succinate) (PBS), poly (ethylene adipate), poly (butylene adipate), poly (ethylene sebacate), poly (butylene sebacate), poly (valero lactone) (PVL), poly (decalactone), polyhydroxyvalerate, poly (beta-malic acid), poly-3-hydroxybutyrate (PHB), poly-3-hydroxy-butyrate-co-3 -hydroxyvalerate (P-3HB- 3HV), poly-3-hydroxybutyrate-co-4-hydroxybutyrate (P-3HB-4HB), poly-3- hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate (P-3HB-4HB), poly-3- hydroxybutyrate-co-3
- anhydrides or polyanhydrides such as those derived from polysébacic acid, polyadipic acid, polyterephthalic acid, poly (bis (p-carboxyphenoxy) alkane acid, or more broadly from polyanhydrides described as example in Advanced Drug Delivery Reviews 54 (2002) 889-910, also bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate and carboxylate;
- saccharides and polysaccharides comprising in particular carrageenans, dextrans, cyclodextrins, such as, for example, hyaluronic acid, agarose, chitosan, chitin, alginate, starch, cellulose and its derivatives such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose or methyl hydroxypropyl cellulose, additionally carrying at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate and carboxylate functions;
- cyclodextrins such as, for example, hyaluronic acid, agarose, chitosan, chitin,
- ethers and polyethers comprising in particular polyethylene glycols, further bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy functions, siloxane, amine, lactone, phosphate and carboxylate; and
- amides and polyamides comprising in particular poly (ester amide) or polyphthalamide, further carrying at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate and carboxylate functions;
- polyurethanes comprising in particular the reaction products of polyols with polyisocyanates, said reaction products further bearing at least one reactive function chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl functions ester, thiolene, maleate, epoxy, siloxane, amine, lactone, phosphate and carboxylate.
- polystyrene resin 1, 4-butanediol, 1, 2-propanediol, hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, methylpropanediol, bisphenol A, polyoxypropylene diol, polybutadiene diol, oxytetramethylene glycol, ethylene glycol adipate diol, polyethylene adipate glycol propylene glycol diol, polyadipate diethylene glycol diol, polyethylene adipate-diethylene glycol ester diol, pentaerythritol, glycerol, trimethylolhydroxypropane, trichanepropylene glycol or oxypropylene triol.
- polyisocyanates mention may be made of hexamethylene diisocyanate derivatives, methylene dicyclohexyl diisocyanate derivatives, or isophorone diisocyanate derivatives.
- the crosslinked polymer is chosen from the group consisting of crosslinked polyesters, crosslinked polyepoxies and crosslinked polyurethanes.
- the crosslinked polymer of the shell of the solid microcapsules is obtained by polymerization of a C2 composition comprising at least one monomer or polymer bearing at least one reactive function as defined above, at least one crosslinking agent and optionally at less a photoinitiator or crosslinking catalyst.
- crosslinking agent is meant a compound carrying at least two reactive functions capable of crosslinking a monomer or a polymer, or a mixture of monomers or polymers, during its polymerization.
- the crosslinking agent can be chosen from molecules bearing at least two identical or different functions chosen from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, vinyl ester, thiolene, maleate, epoxy, siloxane, amine functions, lactone, phosphate and carboxylate.
- crosslinking agent there may be mentioned in particular:
- diacrylates such as 1,6-hexanediol diacrylate, 1, 6-hexanediol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, 1, 9-nonanediol dimethacrylate, 1, 4-butanediol dimethacrylate, 1, 3 -butanediol dimethacrylate, 1, 10-decanediol dimethacrylate, bis (2-methacryloxyethyl) N, N'-1, 9-nonylene biscarbamate, 1, 4-butanediol diacrylate, 1, 5-pentanediol dimethacrylate, allyl methacrylate, N, N'-methylenebisacrylamide, 2,2-bis [4- (2-hydroxy-3-methacryloxypropoxy) phenyl] propane, tetraethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, triethylene glycol dimeth
- multifunctional acrylates such as dipentaerythritol pentaacrylate, 1, 1, 1 - trimethylolpropane triacrylate, 1, 1, 1 -trimethylolpropane trimethacrylate, ethylenediamine tetramethacrylate, pentaerythritol triacrylate or pentaerythritol tetraacrylate; and
- acrylates also possessing another reactive function, such as propargyl methacrylate, N-acryloxysuccinimide, N- (2-Hydroxypropyl) methacrylamide, N- (t-BOC-aminopropyl) methacrylamide, monoacryloxyethyl phosphate, acrylic anhydride, 2- (tert-butylamino) ethyl methacrylate, N, N-diallylacrylamide or glycidyl methacrylate.
- propargyl methacrylate N-acryloxysuccinimide
- N- (2-Hydroxypropyl) methacrylamide N- (t-BOC-aminopropyl) methacrylamide
- monoacryloxyethyl phosphate acrylic anhydride
- 2- (tert-butylamino) ethyl methacrylate N, N-diallylacrylamide or glycidyl methacrylate.
- photoinitiator is meant a compound capable of fragmenting under the effect of light radiation.
- the photoinitiators which can be used according to the present invention are known in the art and are described, for example, in "Photoinitiators in the crosslinking of coatings", G. Li Bassi, Double Liaison - Chimie des Peintures, No. 361, November 1985, p. 34-41; "Industrial applications of photoinduced polymerization", Henri Strub, L'Actualéclairage Chimique, February 2000, p.5-13; and "Photopolymers: theoretical considerations and setting reaction", Marc, J.M. Abadie, Double Liaison - Chimie des Peintures, No. 435-436, 1992, p.28-34.
- photoinitiators include:
- - ⁇ -hydroxy ketones such as 2-hydroxy-2-methyl-1 -phenyl-1 -propanone, sold for example under the names DAROCUR® 1 173 and 4265, IRGACURE® 184, 2959, and 500 by the company BASF, and ADDITOL® CPK by the company CYTEC;
- - ⁇ -aminoketones in particular 2-benzyl-2-dimethylamino-1 - (4-morpholinophenyl) -butanone-1, sold for example under the names IRGACURE® 907 and 369 by the company BASF;
- aromatic ketones sold for example under the name ESACURE® TZT by LAMBERTI; or else the thioxanthones marketed for example under the name ESACURE® ITX by LAMBERTI, and quinones.
- aromatic ketones most often require the presence of a hydrogen donor compound such as tertiary amines and in particular alkanolamines. Mention may in particular be made of the tertiary amine ESACURE® EDB marketed by the company LAMBERTI.
- acylphosphine oxides such as, for example, bis-acylphosphine oxides (BAPO) sold for example under the names IRGACURE® 819, 1700, and 1800, DAROCUR® 4265, LUCIRIN® TPO, and LUCIRIN® TPO-L by the BASF company.
- BAPO bis-acylphosphine oxides
- aromatic ketones such as benzophenone, phenylglyoxylates, such as the methyl ester of phenyl glyoxylic acid, oxime esters, such as [1 - (4-phenylsulfanylbenzoyl) heptylideneamino] benzoate, sulfonium salts, iodonium salts and oxime sulfonates.
- the solid microcapsules are obtained by a process comprising the following steps:
- composition C2 being between 500 mPa.s and
- composition C2 comprising:
- composition C3 being between 500 mPa.s and 100,000 mPa.s at 25 ° C, and preferably being greater than the viscosity of the emulsion (E1),
- composition C2 d) polymerization of composition C2, whereby solid microcapsules dispersed in composition C3 are obtained.
- the aforementioned process consists in producing a double emulsion composed of droplets containing at least one perfuming agent, enveloped in a crosslinkable liquid phase. These double drops are then made monodisperse in size before being transformed by crosslinking or polymerization into rigid capsules.
- the preparation involves 4 steps described in detail below.
- the method of the invention comprises a preliminary step, before the above-mentioned step a) of preparing a composition C1 in the form of an emulsion.
- composition c1 comprising a perfuming agent is added to a hydrophilic composition c2, this step being carried out with stirring, which means that the composition C1 is stirred, typically mechanically, while the composition c1 comprising the agent fragrance is added, in order to emulsify the mixture of composition C1.
- the composition c1 comprising the perfuming agent is at a temperature between 0 ° C and 100 ° C, preferably between 10 ° C and 80 ° C, and preferably between 15 ° C and 60 ° C.
- the hydrophilic composition c2 is at a temperature between 0 ° C and 100 ° C, preferably between 10 ° C and 80 ° C, and preferably between 15 ° C and 60 ° C.
- any type of agitator usually used to form emulsions such as for example a mechanical agitator with blades, a static emulsifier, an ultrasonic homogenizer, a membrane homogenizer, a high pressure homogenizer. , a colloid mill, a high shear power disperser or a high speed homogenizer.
- the hydrophilic composition c2 contains a gelling agent.
- a gelling agent is added to composition C1 once composition c1 containing the perfuming agent has been emulsified in hydrophilic composition c2.
- agitator used to homogenize a solution, such as for example a mechanical paddle agitator with a low speed of rotation.
- Step a) of the process according to the invention consists in preparing a first emulsion (E1).
- the first emulsion consists of a dispersion of droplets of composition C1 (containing at least one perfuming agent) in a polymeric composition C2 immiscible with C1, created by dropwise addition of C1 into C2 with stirring.
- a composition C1 is added to a crosslinkable polymeric composition C2, this step being carried out with stirring, which means that the composition C2 is stirred, typically mechanically, while the composition C1 is added, and this in order to emulsify the mixture of compositions C1 and C2.
- composition C1 to composition C2 is typically done dropwise.
- composition C1 is at a temperature between 0 ° C and 100 ° C, preferably between 10 ° C and 80 ° C, and preferably between 15 ° C and 60 ° C.
- composition C2 is at a temperature between 0 ° C and 100 ° C, preferably between 10 ° C and 80 ° C, and preferably between 15 ° C and 60 ° C.
- compositions C1 and C2 are not miscible with one another, which means that the amount (by weight) of composition C1 capable of being dissolved in composition C2 is less than or equal to 5%, preferably less than 1%, and preferably less than 0.5%, relative to the total weight of composition C2, and that the amount (by weight) of composition C2 capable of to be solubilized in composition C1 is less than or equal to 5%, preferably less than 1%, and preferably less than 0.5%, relative to the total weight of composition C1.
- composition C1 comes into contact with composition C2 with stirring, the latter is dispersed in the form of drops, called single drops.
- compositions C1 and C2 also makes it possible to prevent the migration of the active ingredient from composition C1 to composition C2.
- composition C2 is stirred so as to form an emulsion comprising drops of composition C1 dispersed in composition C2.
- This emulsion is also called a “simple emulsion” or C1 -in-C2 emulsion.
- step a one can use any type of agitator usually used to form emulsions, such as for example a mechanical agitator with blades, a static emulsifier, an ultrasonic homogenizer, a membrane homogenizer, a homogenizer. high pressure, colloid mill, high shear disperser or high speed homogenizer.
- a mechanical agitator with blades such as for example a mechanical agitator with blades, a static emulsifier, an ultrasonic homogenizer, a membrane homogenizer, a homogenizer. high pressure, colloid mill, high shear disperser or high speed homogenizer.
- Composition C2 is intended to form the future solid envelope of the microcapsules.
- the volume fraction of C1 in C2 can vary from 0.1 to 0.6 in order to control the thickness of the shell of the capsules obtained at the end of the process.
- the ratio between the volume of composition C1 and the volume of composition C2 varies between 1:10 and 10: 1.
- this ratio is between 1: 3 and 5: 1, preferably between 1: 3 and 3: 1.
- the viscosity of composition C2 at 25 ° C is between 1,000 mPa.s and 50,000 mPa.s, preferably between 2,000 mPa.s and 25,000 mPa.s, and for example between 3,000 mPa. s and 15,000 mPa.s.
- the viscosity of composition C2 is greater than the viscosity of composition C1.
- the viscosity is measured using a Haake Rheostress TM 600 rheometer equipped with a 60 mm diameter cone with an angle of 2 degrees, and a temperature control cell set at 25 ° C.
- the viscosity value is read for a shear rate equal to 10 s -1 .
- the kinetics of destabilization of the drops of the emulsion (E1) is significantly slow, which allows the envelope of the microcapsules to be polymerized during step d) before the emulsion becomes destabilized. .
- Polymerization, once completed, then provides thermodynamic stabilization.
- the relatively high viscosity of composition C2 ensures the stability of the emulsion (E1) obtained at the end of step a).
- the interfacial tension between compositions C1 and C2 is low.
- these interfacial tensions vary between 0 mN / m and 50 mN / m, preferably between 0 mN / m and 20 mN / m.
- compositions C1 and C2 also makes it possible advantageously to ensure the stability of the emulsion (E1) obtained at the end of step a).
- Composition C2 contains at least one monomer or polymer as defined above, at least one crosslinking agent as defined above, and optionally at least one photoinitiator or crosslinking catalyst as defined above, thus making it crosslinkable. .
- composition C2 comprises from 50% to 99% by weight of monomer or polymer as defined above, or a mixture of monomers or polymers as defined above, relative to the total weight of composition C2.
- composition C2 comprises from 1% to 20% by weight of crosslinking agent or of a mixture of crosslinking agents as defined above, relative to the total weight of composition C2. According to one embodiment, composition C2 comprises from 0.1% to 5% by weight of photoinitiator or of a mixture of photoinitiators as defined above, relative to the total weight of the composition C2.
- composition C2 comprises from 0.001% to 20% by weight of crosslinking agent (s) relative to the total weight of said composition.
- composition C2 can further comprise an additional monomer or polymer capable of improving the properties of the shell of the microcapsules and / or of giving new properties to the shell of the microcapsules.
- Additional monomers or polymers can induce the breaking of the solid microcapsules and subsequently the release of their contents, after stimulation via, for example, pH, temperature, UV or IR.
- These additional monomers or polymers can be chosen from monomers or polymers bearing at least one of the following groups:
- a group sensitive to the pH such as primary, secondary or tertiary amines, carboxylic acids, phosphate, sulfate, nitrate or carbonate groups;
- UV or photochromic group
- group sensitive to UV or cleavable by UV (or photochromic group) such as azobenzene, spiropyran, 2-diazo-1, 2-naphthoquinone, o-nitrobenzyl, thiol, or 6-nitro-veratroyloxycarbonyl groups, for example poly (ethylene oxide) -block-poly (2-nitrobenzylmethacrylate), and other block copolymers, as described in particular in Liu et al., Polymer Chemistry 2013, 4, 3431 -3443;
- a group sensitive to IR or cleavable by IR such as o-nitrobenzyl or 2-diazo-1, 2-naphthoquinone, for example the polymers described in Liu et al., Polymer Chemistry 2013, 4, 3431 -3443;
- a group sensitive to hydrolysis such as poly (lactic acid), poly (glycolic acid), poly (lactic-co-glycolic acid), polycaprolactone, polyhydroxybutyrate, chitosan, dextran, agarose, cellulose and derivatives of these compounds; and
- Step b) of the process according to the invention consists in preparing a second emulsion (E2).
- the second emulsion consists of a dispersion of droplets of the first emulsion in a composition C3 immiscible with C2, created by dropwise addition of the emulsion (E1) in C3 with stirring.
- the emulsion (E1) is at a temperature between 15 ° C and 60 ° C.
- composition C3 is at a temperature between 15 ° C and 60 ° C.
- compositions C2 and C3 are not miscible with one another, which means that the amount (by weight) of composition C2 capable of being dissolved in composition C3 is less than or equal to 5%, preferably less than 1%, and preferably less than 0.5%, relative to the total weight of composition C3, and that the amount (by weight) of composition C3 capable of to be solubilized in composition C2 is less than or equal to 5%, preferably less than 1%, and preferably less than 0.5%, relative to the total weight of composition C2.
- emulsion (E1) comes into contact with the composition C3 with stirring, the latter is dispersed in the form of drops, called double drops, the dispersion of these drops of emulsion (E1) in the continuous phase C3 being called emulsion (E2).
- a double drop formed during step b) corresponds to a single drop of composition C1 as described above, surrounded by an envelope of composition C2 which completely encapsulates said single drop.
- the double drop formed during step b) can also comprise at least two single drops of composition C1, said single drops being surrounded by an envelope of composition C2 which completely encapsulates said single drops.
- said double drops comprise a core consisting of one or more single drops of composition C1, and a layer of composition C2 surrounding said core.
- the resulting emulsion (E2) is usually a double polydisperse emulsion (C1-in-C2-in-C3 emulsion or C1 / C2 / C3 emulsion), which means that the double drops do not have a clear size distribution in the body.
- emulsion (E2) The immiscibility between compositions C2 and C3 makes it possible to avoid mixing between the layer of composition C2 and composition C3 and thus ensures the stability of the emulsion (E2).
- compositions C2 and C3 also makes it possible to prevent the water-soluble substance of composition C1 from migrating from the core of the drops to composition C3.
- any type of stirrer usually used to form emulsions can be used, such as for example a mechanical paddle stirrer, a static emulsifier, an ultrasonic homogeniser, a membrane homogeniser, a homogeniser. high pressure, colloid mill, high shear disperser or high speed homogenizer.
- the viscosity of composition C3 at 25 ° C is greater than the viscosity of the emulsion (E1) at 25 ° C.
- the viscosity of composition C3 at 25 ° C is between 500 mPa.s and 100,000 mPa.s.
- the viscosity of composition C3 at 25 ° C is between 3,000 mPa.s and 100,000 mPa.s, preferably between 5,000 mPa.s and 80,000 mPa.s, for example between 7,000 mPa.s and 70,000 mPa.s.
- the rate of destabilization of the double drops of the emulsion (E2) is significantly slow compared to the duration of the process of the invention. , which then provides kinetic stabilization of the emulsions (E2) then (E3) until the polymerization of the capsule shell is complete.
- the capsules once polymerized are thermodynamically stable.
- composition C3 ensures the stability of the emulsion (E2) obtained at the end of step b).
- a low surface tension between C3 and the first emulsion as well as a high viscosity of the system make it possible to advantageously ensure the kinetic stability of the double emulsion (E2), preventing it from being out of phase during the duration of the manufacturing process.
- the interfacial tension between compositions C2 and C3 is low.
- the low interfacial tension between compositions C2 and C3 also advantageously makes it possible to ensure the stability of the emulsion (E2) obtained at the end of step b).
- the volume fraction of the first emulsion in C3 can be varied from 0.05 to 0.5 in order on the one hand to improve the production yield and on the other hand to vary the average diameter of the capsules. At the end of this step, the size distribution of the second emulsion is relatively wide.
- the ratio between the volume of emulsion (E1) and the volume of composition C3 varies between 1: 10 and 10: 1.
- this ratio is between 1: 9 and 3: 1, preferably between 1: 9 and 1: 1.
- composition C3 further comprises at least one branched polymer, preferably of molecular weight greater than 5,000 g. mol -1 , and / or at least one polymer with a molecular weight greater than 5,000 g. mol 1 , and / or solid particles such as silicates.
- composition C3 comprises at least one branched polymer, preferably of molecular weight greater than 5,000 g. mol 1 , preferably between 10,000 g. mol 1 and 500,000 g. mol 1 , for example between 50,000 g. mol 1 and 300,000 g. mol 1 .
- branched polymer (or branched polymer) is meant a polymer having at least one branching point between its two terminal groups, a branching point (also called branching point) being a point of a chain to which is attached a side chain also called a branch or hanging chain.
- branched polymers mention may be made, for example, of graft polymers, comb polymers or also star polymers or dendrimers.
- composition C3 comprises at least one polymer with a molecular weight greater than 5,000 g. mol 1 , preferably between 10,000 g. mol 1 and 500,000 g. mol 1 , for example between 50,000 g. mol 1 and 300,000 g. mol 1 .
- polymer which can be used in composition C3
- cellulose ethers such as cellulose ethers: methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose or methyl hydroxypropyl cellulose;
- polyacrylates also called carbomers
- PAM polyacrylic acid
- PMAA polymethacrylic acid
- HPEMA poly (hydroxyethyl methacrylate)
- HPMA poly (N-2-hydroxypropyl methacrylate)
- PNIPAM poly (N-isopropylacrylamide)
- PVP polyvinylpyrrolidone
- PVA polyvinyl alcohol
- poly (ethylene glycol), poly (propylene glycol) and their derivatives such as poly (ethylene glycol) acrylate / methacrylate, poly (ethylene glycol) diacrylate / dimethacrylate, polypropylene carbonate;
- polysaccharides such as carrageenans, locust bean gums or tara gums, dextran, xanthan gums, chitosan, agarose, hyaluronic acids, gellan gum, guar gum, arabic gum, tragacanth , diutan gum, oat gum, karaya gum, ghatti gum, curdlan gum, pectin, konjac gum, starch;
- - protein derivatives such as gelatin, collagen, fibrin, polylysine, albumin, casein;
- silicone derivatives such as polydimethylsiloxane (also called dimethicone), alkyl silicones, aryl silicones, alkyl aryl silicones, polyethylene glycol dimethicones, polypropylene glycol dimethicones;
- - waxes such as diester waxes (alkanediol diesters, hydroxyl acid diesters), triester waxes (triacylglycerols, alkane-1, 2-diol, w-hydroxy acid and fatty acid triesters, esters hydroxymalonic acid, fatty acid and alcohol, triesters of hydroxyl acids, fatty acid and fatty alcohol, triesters of fatty acid, hydroxyl acid and diol) and polyester waxes (polyesters of Fatty acids).
- diester waxes alkanediol diesters, hydroxyl acid diesters
- triester waxes triacylglycerols, alkane-1, 2-diol, w-hydroxy acid and fatty acid triesters, esters hydroxymalonic acid, fatty acid and alcohol, triesters of hydroxyl acids, fatty acid and fatty alcohol, triesters of fatty acid, hydroxyl acid and diol
- polyester waxes
- fatty acid esters which can be used as waxes in the context of the invention are, for example, cetyl palmitate, cetyl octanoate, cetyl laurate, cetyl lactate, cetyl isononanoate, stearate cetyl, stearyl stearate, myristyl stearate, cetyl myristate, isocetyl stearate, glyceryl trimyristate, glyceryl tripalmitate, glyceryl monostearate or glyceryl and cetyl palmitate; - fatty acids which can be used as waxes such as cerotic acid, palmitic acid, stearic acid, dihydroxystearic acid, behenic acid, lignoceric acid, arachidic acid, myristic acid, l lauric acid, tridecyclic acid, pentadecyclic acid, margaric acid, nonadecyclic acid, heneicosylic acid, tri
- - fatty acid salts in particular aluminum salts of fatty acids such as aluminum stearate, hydroxyl aluminum bis (2-ethylhexanoate);
- castor oil and its derivatives in particular modified hydrogenated castor oil or compounds obtained by esterification of castor oil with fatty alcohols;
- composition C3 comprises solid particles such as clays, silicas and silicates.
- composition C3 As solid particles that can be used in composition C3, mention may be made of clays and silicates belonging in particular to the category of phyllosilicates (also called sheet silicas).
- silicates which can be used in the context of the invention, mention may be made of Bentonite, Hectorite, Attapulgite, Sepiolite, Montmorillonite, Saponite, Sauconite, Nontronite, Kaolinite, Talc. , Sepiolite, Chalk. Synthetic pyrogenic silicas can also be used.
- the clays, silicates and silicas mentioned above can advantageously be modified by organic molecules such as polyethers, ethoxylated amides, quaternary ammonium salts, long chain diamines, long chain esters, polyethylene glycols, polypropylene glycols.
- composition C3 comprises at least one polymer with a molecular weight greater than 5,000 g. mol 1 and solid particles. Any mixture of the compounds mentioned above can be used.
- Step c) of the process according to the invention consists in refining the size of the drops of the second emulsion (E2).
- This step may consist in applying a homogeneous controlled shear to the emulsion (E2), said applied shear rate being between 10 s -1 and 100,000 s 1 .
- the polydisperse double drops obtained in step b) are subjected to size refining consisting in subjecting them to a shear capable of fragmenting them into new double drops of homogeneous and controlled diameters.
- this fragmentation step is carried out using a high shear cell of Couette type according to a process described in patent application EP 15 306 428.2.
- step c) the second emulsion (E2), obtained at the end of step b), consisting of double polydisperse drops dispersed in a continuous phase, is subjected to shearing in a mixer, which applies a homogeneous controlled shear.
- step c) consists in applying a homogeneous controlled shear to the emulsion (E2), said applied shear rate being between 1000 s -1 and 100,000 s -1 .
- the shearing speed is said to be controlled and homogeneous, independently of the duration, when it passes to an identical maximum value for all the parts of the emulsion, at a given time which may vary. from one point of the emulsion to another.
- the exact configuration of the mixer is not essential according to the invention, as long as the entire emulsion has been subjected to the same maximum shear on leaving this device.
- Mixers suitable for performing step c) are described in particular in document US Pat. No. 5,938,581.
- the second emulsion can undergo homogeneous controlled shear as it circulates through a cell formed by:
- the shear rate applied to the second emulsion is between 1000 s -1 and 100,000 s -1 , preferably between 1000 s -1 and 50,000 s -1 , and preferably between 2000 s -1 and 20,000 s -1 .
- the second emulsion is introduced into the mixer and is then subjected to shearing which results in the formation of the third emulsion.
- the third emulsion (E3) is chemically identical to the second emulsion (E2) but consists of double monodisperse drops while the emulsion (E2) consists of double polydisperse drops.
- the third emulsion (E3) typically consists of a dispersion of double drops comprising a core consisting of one or more drops of composition C1 and a layer of composition C2 encapsulating said core, said double drops being dispersed in composition C3.
- the difference between the second emulsion and the third emulsion is the size variance of the double drops: the drops of the second emulsion are polydisperse in size while the drops of the third emulsion are monodisperse, thanks to the fragmentation mechanism described above.
- the second emulsion is introduced continuously into the mixer which means that the quantity of double emulsion (E2) introduced at the inlet of the mixer is the same as the quantity of third emulsion ( E3) at the outlet of the mixer.
- the size of the drops of the emulsion (E3) essentially corresponds to the size of the drops of the solid microcapsules after polymerization, it is possible to adjust the size of the microcapsules and the thickness of the envelope by adjusting the speed of shear during step c), with a strong correlation between the decrease in the size of the drops and the increase in the shear rate. This allows the resulting dimensions of the microcapsules to be adjusted by varying the shear rate applied during step c).
- the mixer used during step c) is a Couette type mixer, comprising two cylinders. concentric, an external cylinder of internal radius R 0 and an internal cylinder of external radius R ,, the external cylinder being fixed and the internal cylinder being in rotation with an angular speed w.
- a Couette-type mixer suitable for the process of the invention can be supplied by the company T.S.R. France.
- the angular speed w of the rotating internal cylinder of the Couette type mixer is greater than or equal to 30 rad.s -1 .
- the angular speed w of the rotating internal cylinder of the Couette-type mixer is approximately 70 rad.s -1 .
- the distance d between the two concentric cylinders is equal to 100 ⁇ m.
- the second emulsion is introduced at the inlet of the mixer, typically via a pump, and is directed towards the space between the two concentric cylinders, the outer cylinder being fixed and the internal cylinder being rotated at an angular speed w.
- step c) consists in applying to the emulsion (E2) a shear rate of less than 1000 s -1 .
- the fragmentation step c) can be carried out using any type of mixer usually used to form emulsions with a shear rate of less than 1000 s 1 , in which case the viscosity of composition C3 is greater than 2000 mPa.s, namely under conditions such as those described in patent application FR 16 61787.
- step c) the emulsion (E2), consisting of polydisperse drops dispersed in a continuous phase, is subjected to shearing, for example in a mixer, at a low shear speed, at namely less than 1000 s -1 .
- the shear rate applied in step c) is for example between 10 s -1 and 1000 s -1 .
- the shear speed applied in step c) is strictly less than 1000 s -1 .
- the emulsion drops (E2) can only be effectively fragmented into fine, monodisperse emulsion drops (E3) if a high shear stress is applied to them.
- the shear stress s applied to an emulsion drop (E2) is defined as the tangential force per unit area of the drop resulting from the macroscopic shear applied to the emulsion during its agitation during step d).
- composition C3 makes it possible to apply a very high shear stress to the drops of emulsion (E2) in the mixer, even if the shear rate is low and the shear inhomogeneous.
- step c) one can use any type of agitator usually used to form emulsions, such as for example a mechanical agitator with blades, a static emulsifier, an ultrasonic homogenizer, a homogenizer. membrane, a high pressure, colloid mill, high shear disperser or high speed homogenizer.
- a mechanical agitator with blades such as for example a mechanical agitator with blades, a static emulsifier, an ultrasonic homogenizer, a homogenizer. membrane, a high pressure, colloid mill, high shear disperser or high speed homogenizer.
- a simple foam concentrate such as a mechanical paddle stirrer or a static foam concentrate is used to carry out step c).
- a simple foam concentrate such as a mechanical paddle stirrer or a static foam concentrate is used to carry out step c).
- this is possible because this embodiment requires neither a controlled shear nor a shear greater than 1000 s 1 .
- Step d) of the process of the invention consists of the crosslinking and therefore the formation of the shell of the solid microcapsules according to the invention.
- This step allows both to achieve the expected performance of capsule retention and to ensure their thermodynamic stability, by permanently preventing any destabilization mechanism such as coalescence or ripening.
- step d) is a photopolymerization step consisting in exposing the emulsion (E3) to a light source capable of initiating the photopolymerization of composition C2, in particular to a UV light source preferably emitting in the wavelength range between 100 nm and 400 nm, and in particular for a period of less than 15 minutes.
- a light source capable of initiating the photopolymerization of composition C2
- a UV light source preferably emitting in the wavelength range between 100 nm and 400 nm, and in particular for a period of less than 15 minutes.
- step d) consists in subjecting the emulsion (E3) to photopolymerization, which will allow the photopolymerization of composition C2. This step will make it possible to obtain microcapsules encapsulating the water-soluble substance as defined above.
- step d) consists in exposing the emulsion (E3) to a light source capable of initiating the photopolymerization of the composition C2.
- the light source is a UV light source.
- the UV light source emits in the wavelength range between 100 nm and 400 nm.
- the emulsion (E3) is exposed to a light source for a period of less than 15 minutes, and preferably for 5 to 10 minutes.
- step d the envelope of the aforementioned double drops, made of photocrosslinkable composition C2, is crosslinked and thus converted into a viscoelastic polymeric envelope, encapsulating and protecting the water-soluble substance from its release in the absence of mechanical triggering.
- step d) is a polymerization step, without exposure to a light source, the duration of this polymerization step d) preferably being between 8 hours and 100 hours and / or this step d) is carried out at a temperature between 20 ° C and 80 ° C.
- the polymerization is initiated for example by exposure to heat (thermal initiation), or by simply bringing the monomers, polymers and crosslinking agents into contact with one another, or with a catalyst.
- the polymerization time is then generally greater than several hours.
- step d) of polymerization of composition C2 is carried out for a period of between 8 hours and 100 hours, at a temperature of between 20 ° C and 80 ° C.
- composition obtained at the end of step d), comprising solid microcapsules dispersed in composition C3, is ready to use and can be used without any additional post-treatment step of the capsules being required.
- the thickness of the envelope of the microcapsules thus obtained is typically between 0.1 ⁇ m and 20 ⁇ m, preferably between 0.2 ⁇ m and 8 ⁇ m, and preferably between 0.2 ⁇ m and 5 ⁇ m.
- the solid microcapsules obtained at the end of step d) are devoid of surfactant.
- the method of the invention has the advantage of not requiring a surfactant in any of the steps described.
- the process of the invention thus makes it possible to reduce the presence of additives which could modify the properties of the final product obtained after release of the perfuming agent.
- the present invention also relates to the use of a composition as defined above, for washing and / or caring for laundry.
- the present invention also relates to the use of microcapsules as defined above for improving the olfactory and / or sensory properties of a composition for washing and / or caring for laundry.
- the present invention also relates to the use of the microcapsules as defined above to reduce, or even prevent, the evaporation of the perfuming agent provided by the microcapsules.
- a mechanical stirrer (Ika Eurostar 20) equipped with a deflocculating-type stirring propeller is used to perform all the stirring steps.
- phase A The ingredients of phase A are stirred together at 300 rpm until homogenized.
- Tween 80 is gradually added to distilled water with stirring at 2000 rpm until homogenization.
- Phase A is then gradually added to phase B with stirring at 2000 rpm.
- the whole is kept under stirring for 2 minutes and then subjected to sonication (SFX 550, Branson) in an ice bath for 1.5 minutes (pulses 10s / 5s) at 40% amplitude.
- SFX 550 sonication
- composition C1 After cooling, 1.4 g of Aculyn 44N gelling agent (Dow) are added to the mixture with stirring at 200 rpm until gelling in order to obtain composition C1.
- Aculyn 44N gelling agent (Dow)
- composition C1 is gradually added to composition C2 with stirring at 300 rpm.
- Composition C3 is placed under stirring at 1000 rpm until complete homogenization and then left to stand for one hour at room temperature.
- the first emulsion (E1) is then gradually added to composition C3 with stirring at 2000 rpm.
- the second emulsion (E2) is thus obtained. Refining in size of the second emulsion
- the second polydisperse emulsion (E2) obtained in the previous step is stirred at 2000 rpm for 3 minutes.
- a monodisperse emulsion (E3) is thus obtained.
- the second monodisperse emulsion (E3), obtained in the previous step, is irradiated for 10 minutes using a UV light source (Dymax LightBox ECE 2000) having a maximum light intensity of 0.1 W / cm 2 at a wavelength of 365 nm.
- a UV light source Dymax LightBox ECE 2000
- microcapsules obtained have an average size of 9.5 ⁇ m and their size distribution has a standard deviation of 3.1 ⁇ m, ie 33%.
- microcapsules obtained are subjected to 3 successive cycles of dilution with distilled water and centrifugation in order to produce a suspension of microcapsules in distilled water containing 50% by mass of microcapsules.
- the biodegradability of the microcapsules prepared according to Example 1 is measured according to the OECD guideline number 301 A, available from the OECD and at the following address: https://www.oecd-ilibrary.org/fr / environment / test-n- 301 -biodegradabilite-Facile_9789264070356-en.
- the microcapsule suspensions are diluted with distilled water to a concentration such that their dissolved organic carbon (DOC) concentration is between 10 and 40 mg DOC / L and incubated with seed from an inlet of urban biological wastewater treatment plant in a room protected from light with stirring at 22 ° C.
- DOC dissolved organic carbon
- Example 3 Preparation of a main wash product formula
- sample LP1 containing 5% by mass of microcapsules prepared according to Example 1
- sample LP2 containing 0.97% by mass of perfume Romance 0330.
- sample AD1 containing 5% by mass of microcapsules prepared according to Example 1
- sample AD2 containing 0.97% by mass of perfume Romance 0330.
- Example 5 Preparation of a sample of washed cotton fabric
- a quantity of 10 g of one of the products produced according to Example 3 or Example 4 is mixed with 1 L of deionized water.
- Five 6x10 cm cotton fabric samples are stirred for 5 minutes in the resulting solution, drained, then stirred for 2 minutes in 1 L of deionized water, drained and finally air dried for 12 hours.
- Cotton fabric samples prepared according to Example 5 are evaluated by a panel of 5 people on an odor intensity scale from 0 to 5 where 0 represents no odor and 5 represents an extremely strong odor. Each person has two samples of fabric per sample of laundry care product: one is evaluated intact, the other is evaluated after rubbing the fabric against itself. The intensities perceived for each sample (mean ⁇ standard deviation) are recorded in the table below:
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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Emergency Medicine (AREA)
- Detergent Compositions (AREA)
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- Manufacturing Of Micro-Capsules (AREA)
Abstract
Description
Claims
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080010558.1A CN113383063A (zh) | 2019-01-22 | 2020-01-22 | 具有改进的嗅觉特性的洗涤剂组合物 |
| AU2020210829A AU2020210829B2 (en) | 2019-01-22 | 2020-01-22 | Detergent compositions having improved olfactory properties |
| US17/425,177 US20220119738A1 (en) | 2019-01-22 | 2020-01-22 | Detergent compositions having improved olfactory properties |
| CN202510207914.3A CN120059859A (zh) | 2019-01-22 | 2020-01-22 | 具有改进的嗅觉特性的洗涤剂组合物 |
| EP20700846.7A EP3914683A1 (fr) | 2019-01-22 | 2020-01-22 | Compositions de detergence avec des propriétés olfactives améliorées |
| SG11202107953UA SG11202107953UA (en) | 2019-01-22 | 2020-01-22 | Detergent compositions having improved olfactory properties |
| BR112021014364-5A BR112021014364B1 (pt) | 2019-01-22 | 2020-01-22 | Composição e uso de uma composição |
| JP2021543322A JP7658906B2 (ja) | 2019-01-22 | 2020-01-22 | 改善された嗅覚特性を有する洗剤組成物 |
| US19/184,362 US20250250516A1 (en) | 2019-01-22 | 2025-04-21 | Detergent compositions having improved olfactory properties |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1900542A FR3091877B1 (fr) | 2019-01-22 | 2019-01-22 | Compositions de detergence avec des propriétés olfactives améliorées |
| FR1900542 | 2019-01-22 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
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| US17/425,177 A-371-Of-International US20220119738A1 (en) | 2019-01-22 | 2020-01-22 | Detergent compositions having improved olfactory properties |
| US19/184,362 Continuation US20250250516A1 (en) | 2019-01-22 | 2025-04-21 | Detergent compositions having improved olfactory properties |
Publications (1)
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|---|---|
| WO2020152216A1 true WO2020152216A1 (fr) | 2020-07-30 |
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|---|---|---|---|
| PCT/EP2020/051506 Ceased WO2020152216A1 (fr) | 2019-01-22 | 2020-01-22 | Compositions de detergence avec des propriétés olfactives améliorées |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US20220119738A1 (fr) |
| EP (1) | EP3914683A1 (fr) |
| JP (1) | JP7658906B2 (fr) |
| CN (2) | CN120059859A (fr) |
| AU (1) | AU2020210829B2 (fr) |
| FR (1) | FR3091877B1 (fr) |
| SG (1) | SG11202107953UA (fr) |
| WO (1) | WO2020152216A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022013821A1 (fr) * | 2020-07-15 | 2022-01-20 | Isp Investments Llc | Microcapsules biodégradables, leur processus de préparation et leur méthode d'utilisation |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3180364A1 (fr) * | 2021-11-01 | 2023-05-01 | Sani-Marc Inc. | Gels degraissants alcalins oxydants non chlores et utilisations connexes |
| CN114561829A (zh) * | 2022-03-03 | 2022-05-31 | 马佳声 | 一种抗菌组合物、抗菌纸浆及其制备方法 |
| EP4389276A1 (fr) * | 2022-12-20 | 2024-06-26 | Calyxia | Procédé de fabrication de microcapsules comprenant un noyau polymérisé et son utilisation |
| WO2024130580A1 (fr) * | 2022-12-21 | 2024-06-27 | 广州洁生日化有限公司 | Feuille de détergent pour lessive |
| EP4552734A1 (fr) * | 2023-11-07 | 2025-05-14 | Calyxia | Microcapsules contenant des ingrédients volatils |
| WO2025190840A1 (fr) * | 2024-03-11 | 2025-09-18 | Firmenich Sa | Microcapsules coeur-écorce à base de phosphore |
| CN120737914B (zh) * | 2025-06-27 | 2026-01-30 | 广东卡迪娜实业有限公司 | 一种祛味除腥洗涤剂 |
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- 2019-01-22 FR FR1900542A patent/FR3091877B1/fr active Active
-
2020
- 2020-01-22 US US17/425,177 patent/US20220119738A1/en not_active Abandoned
- 2020-01-22 AU AU2020210829A patent/AU2020210829B2/en active Active
- 2020-01-22 CN CN202510207914.3A patent/CN120059859A/zh active Pending
- 2020-01-22 WO PCT/EP2020/051506 patent/WO2020152216A1/fr not_active Ceased
- 2020-01-22 EP EP20700846.7A patent/EP3914683A1/fr active Pending
- 2020-01-22 SG SG11202107953UA patent/SG11202107953UA/en unknown
- 2020-01-22 JP JP2021543322A patent/JP7658906B2/ja active Active
- 2020-01-22 CN CN202080010558.1A patent/CN113383063A/zh active Pending
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2025
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022013821A1 (fr) * | 2020-07-15 | 2022-01-20 | Isp Investments Llc | Microcapsules biodégradables, leur processus de préparation et leur méthode d'utilisation |
Also Published As
| Publication number | Publication date |
|---|---|
| US20220119738A1 (en) | 2022-04-21 |
| JP7658906B2 (ja) | 2025-04-08 |
| SG11202107953UA (en) | 2021-08-30 |
| JP2022518801A (ja) | 2022-03-16 |
| CN113383063A (zh) | 2021-09-10 |
| BR112021014364A2 (pt) | 2021-09-28 |
| EP3914683A1 (fr) | 2021-12-01 |
| FR3091877A1 (fr) | 2020-07-24 |
| AU2020210829A1 (en) | 2021-08-12 |
| AU2020210829B2 (en) | 2025-08-28 |
| CN120059859A (zh) | 2025-05-30 |
| FR3091877B1 (fr) | 2023-06-16 |
| US20250250516A1 (en) | 2025-08-07 |
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