EP4051240A1 - Émulsion utilisable notamment comme auxiliaire technologique dans le domaine des plastiques, ou comme système d'encapsulation d'actifs, son procédé de préparation et ses applications - Google Patents
Émulsion utilisable notamment comme auxiliaire technologique dans le domaine des plastiques, ou comme système d'encapsulation d'actifs, son procédé de préparation et ses applicationsInfo
- Publication number
- EP4051240A1 EP4051240A1 EP20807846.9A EP20807846A EP4051240A1 EP 4051240 A1 EP4051240 A1 EP 4051240A1 EP 20807846 A EP20807846 A EP 20807846A EP 4051240 A1 EP4051240 A1 EP 4051240A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- emulsion
- weight
- composition
- polyol
- granules
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/12—Carboxylic acids; Salts or anhydrides thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/42—Proteins; Polypeptides; Degradation products thereof; Derivatives thereof, e.g. albumin, gelatin or zein
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1617—Organic compounds, e.g. phospholipids, fats
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1617—Organic compounds, e.g. phospholipids, fats
- A61K9/1623—Sugars or sugar alcohols, e.g. lactose; Derivatives thereof; Homeopathic globules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1629—Organic macromolecular compounds
- A61K9/1658—Proteins, e.g. albumin, gelatin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1682—Processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
Definitions
- the invention relates to the field of emulsions which can be used as a technological aid, in particular in the field of plastics or as an active encapsulation system.
- the present invention relates to an emulsion comprising a polyol, a monounsaturated fatty acid and a milk protein.
- Emulsions are mixtures of two immiscible substances, one being dispersed as droplets in the other.
- the emulsions can be of the oil-in-water type (direct emulsion, O / W or O / W), in which an oily phase is dispersed in an aqueous phase, or of the water-in-oil type (inverse emulsion, W / O or W / O), in which an aqueous phase is dispersed in an oily phase.
- Emulsions are used in many technical fields such as pharmacy, cosmetics, food processing or even plastics.
- emulsions can be used to encapsulate active agents, such as lipophilic active agents, for example.
- active agents such as lipophilic active agents
- the production of emulsions encapsulating active ingredients sometimes has a fairly high production cost.
- emulsions very often include products that are not bio-based, which is undesirable in a context of sustainable development.
- surfactants which are not, or only slightly, biodegradable in emulsions can have a negative impact on the environment, in particular by contributing to the poisoning of water plankton and the weakening of coastal plant species.
- new biodegradable materials are developed. These new materials can be made from polymers of natural origin or from synthetic polymers. For example, vegetable protein, such as corn and soy protein, or animal protein can be used to make packaging.
- casein is particularly interesting. In fact, this protein obtained from milk is accessible in large quantities and the casein-based films exhibit good transparency and good biodegradability.
- Document FR2963013 describes biodegradable thermoplastic granules based on casein and / or caseinate and glycerol, as well as their manufacturing process. These granules can be used to make thermoplastic films. However, these granules and films can be sensitive to humidity conditions, and in particular the films can become brittle and tear when stored in conditions of low relative humidity (eg 30%).
- hydrophobic agent such as a fatty acid
- the present invention aims to satisfy at least one of the following objectives.
- One of the essential objectives of the invention is the provision of an emulsion, which can be used in the formulation and / or the manufacture of plastic materials, pharmaceutical products, cosmetic products or food products.
- Another essential objective of the invention is the provision of an emulsion which makes it possible to encapsulate active ingredients.
- Another essential objective of the invention is to provide an emulsion which makes it possible to encapsulate assets at low cost.
- Another essential objective of the invention is to provide an emulsion making it possible to encapsulate one or more hydrophobic species in a continuous hydrophilic phase.
- Another essential objective of the invention is the provision of an emulsion comprising bio-based products.
- Another essential objective of the invention is to provide an emulsion which can be incorporated into a polymer matrix, in particular a polymer protein matrix.
- One of the essential objectives of the invention is the provision of an emulsion for the manufacture of plastics, in particular bio-based thermoplastics comprising hydrophobic agents and proteins.
- One of the essential objectives of the invention is to provide an emulsion allowing the incorporation of a hydrophobic agent into a polymer protein matrix.
- Another essential objective of the invention is to provide an emulsion which can be used in the production of a thermoplastic material based on protein, in particular based on casein and / or caseinate.
- the invention relates firstly to an emulsion A comprising: a. between 20 and 90% by weight of at least one polyol, preferably between 20 and 89.99%, preferably between 50 and 85%, and more preferably between 60 and 80%; b. between 9 and 75% by weight, preferably between 10 and 50%, and preferably between 15 and 40%, of a composition B comprising at least one monounsaturated fatty acid and optionally an oil; vs. between 0.01 and 1% by weight of at least one milk protein, preferably between 0.05 and 0.75%, and preferably between 0.1 and 0.5%; d. between 1 and 15% by weight of water, preferably between 1.5 and 10%, and preferably between 2 and 7%.
- This emulsion A makes it possible to encapsulate active ingredients at low cost, it makes it possible in particular to encapsulate one or more hydrophobic species in a continuous hydrophilic phase. It can also include bio-based products such as glycerol, oleic acid and sodium caseinate. This emulsion can also consist solely of bio-based products. Furthermore, this emulsion A can be used in the manufacture of a thermoplastic material, such as granules or a film based on casein and / or caseinate. It allows in particular the incorporation of a hydrophobic agent into a polymer protein matrix and the limitation of the phenomenon of lubrication of films from casein and / or caseinate.
- microstructures comprising composition B are present in the granule after extrusion, which makes it possible to envisage numerous applications.
- the invention also relates to a process for preparing an emulsion A comprising the following steps:
- the process for preparing emulsion A is easy to implement.
- the invention also relates to a process for preparing thermoplastic granules comprising the following steps:
- an extruder preferably a twin-screw extruder
- composition to be extruded preferably comprising i) at least one casein and / or at least one caseinate, and ii) at least one plasticizer;
- the invention also relates to thermoplastic granules obtained by the process described in the present application which comprise microstructures comprising composition B.
- the invention also relates to a method for producing a film from thermoplastic granules described in the present application, or from thermoplastic granules obtained according to the method described in the present application, said method comprising a step of processing the granules. in film, preferably by inflation extrusion.
- FIG. 1 shows a confocal microscopic photo of the emulsion according to Example 6 marked with Nile red.
- FIG. 2 shows a confocal microscopic photo of the emulsion according to Example 6 labeled with glutaraldehyde.
- FIG. 3 shows a confocal microscopic photo of the emulsion according to Example 12 labeled with sodium fluorescein.
- FIG. 4 shows a graph representing the dynamic viscosity as a function of the shear rate of the emulsion according to Example 6 and glycerol.
- Fig. 5 shows a graph representing the dynamic viscosity as a function of the shear rate of the emulsion according to Example 6 and glycerol.
- FIG. 5 shows a graph representing the dynamic viscosity as a function of the shear rate of the emulsion according to Example 6 at different temperatures.
- FIG. 6 shows a photo taken by scanning electron microscopy of the microstructures present in the thermoplastic granules according to the invention.
- Fig. 7 shows a photo taken by scanning electron microscopy of the microstructures present in the thermoplastic granules according to the invention.
- FIG. 7 shows a photo taken under scanning electron microscopy of the microstructures present in the thermoplastic granules according to the invention.
- FIG. 8 shows a histogram representing the Young's modulus of films
- FIG. 9 shows a histogram representing the tensile stress of films F ref, F2, F3, F5 and F6.
- emulsion is meant a mixture of two immiscible substances, one being dispersed in the form of droplets in the other.
- polyol an organic compound comprising at least two hydroxyl functions.
- the term "monounsaturated fatty acid” means a mono carboxylic acid with an aliphatic carbon chain of at least 4 carbons, and comprising a single carbon-carbon double bond.
- the monounsaturated fatty acid preferably has between 4 and 36 carbon atoms, and more preferably between 14 and 24 carbon atoms.
- oil is meant a hydrophobic compound, lipophilic, insoluble with water, and which is liquid at room temperature (25 ° C).
- milk protein is understood to mean proteins derived from the milk of mammals, and in particular derived from cow's milk.
- active principle is meant a hydrophilic or lipophilic active substance. It may be a substance having a therapeutic effect, a cosmetic active ingredient, a flavor, a perfume, a food additive or even a tracer or a marker.
- thermoplastic is meant, for example, a material which becomes malleable and pliable above a given temperature, the glass transition temperature Tg, but which below this Tg becomes hard again, these transformations being reversible.
- biodegradable is meant, for example, a material which can be decomposed under the action of microorganisms (bacteria, fungi, algae, etc.). The result of this decomposition is the formation of water, CO2 and / or methane and possibly by-products (residues, new biomass) which are not toxic to the environment.
- a biodegradable material according to European standard EN NF 13432.
- plasticizer is meant, for example, a substance making it possible to lower the glass transition temperature Tg of the material.
- hydrophilic is meant, for example, a compound having an affinity with water and having a tendency to dissolve therein. Typically, it is a compound having polar groups capable of forming hydrogen bonds.
- hydrophobic or “lipophilic” is meant, for example, a compound having little affinity with water and having a tendency not to dissolve therein. Typically, it is a predominantly nonpolar compound.
- biobased is meant, for example, a product made from materials of biological origin.
- water is meant, for example, water or an aqueous solution.
- perfume is meant, for example, a mixture of olfactory molecules, optionally diluted in an alcohol phase or an oily phase.
- the invention relates firstly to an emulsion A comprising: a. between 20 and 90% by weight of at least one polyol, preferably between 20 and 89.99%, preferably between 50 and 85%, and more preferably between 60 and 80%; b. between 9 and 75% by weight, preferably between 10 and 50%, and preferably between 15 and 40%, of a composition B comprising at least one monounsaturated fatty acid and optionally an oil; vs. between 0.01 and 1% by weight of at least one milk protein, preferably between 0.05 and 0.75%, and preferably between 0.1 and 0.5%; d. between 1 and 15% by weight of water, preferably between 1.5 and 10%, and preferably between 2 and 7%.
- emulsion A comprises droplets of composition B in a continuous phase of polyol. It can therefore be a direct emulsion.
- the emulsion may look like a gel or a cream.
- the droplets of composition B can have an average diameter of between 0.1 and 500 ⁇ m, preferably between 0.2 and 200 ⁇ m, and more preferably between 0.5 and 50 ⁇ m.
- the size of the droplets can be measured by confocal microscopy.
- the total volume occupied by the droplets may represent more than 40%, preferably more than 50%, of the total volume of the emulsion.
- the inventors assume that the milk protein is located at the interface between the droplets of composition B and the continuous polyol phase, thereby stabilizing the droplets and the emulsion. It could play the role of surfactant.
- the polyol is chosen from polyols comprising, per molecule, at least 3 carbon atoms and having a ratio R of the number of carbon atoms / number of -OH functions ⁇ 2, preferably the polyol is chosen from glycerol, propane-1, 3-diol, sorbitol and their mixtures.
- the polyol is glycerol, which can be at least partly of plant origin.
- Composition B comprises at least one monounsaturated fatty acid and optionally an oil.
- Composition B can comprise between 1 and 99% by weight of monounsaturated fatty acid and between 1 and 99% by weight of oil, preferably between 5 and 20% of monounsaturated fatty acid and between 95 and 80% of oil. .
- the oil can be of plant, animal, mineral or synthetic origin. Preferably, the oil is of vegetable origin.
- composition B comprises at least one monounsaturated fatty acid and an oil of vegetable origin.
- Oils of vegetable origin mainly contain esters of fatty acids, in particular triglycerides.
- oils of plant origin mention may be made of oils, crude or refined, obtained by crushing seeds, pits or fruits of plants.
- the oil of vegetable origin can be chosen from linseed, rapeseed, sunflower, soybean, olive, palm, palm kernel, castor, wood, corn and squash oils, grape seed, jojoba, sesame, walnut, hazelnut, almond, shea, peanut, copra, Chinese wood, macadamia, cotton, alfalfa, rye, safflower , copra, pine, rice, argan, borage, evening primrose, and their mixtures.
- the oil of vegetable origin is hazelnut oil.
- the monounsaturated fatty acid of composition B can be chosen from oleic acid, palmitoleic acid, erucic acid and mixtures thereof.
- the monounsaturated fatty acid of Composition B is oleic acid.
- the milk protein is chosen from casein, caseinates, Ga-lactalbumin, ⁇ -lactoglobulin, and their mixtures, preferably the milk protein is selected from sodium caseinate, calcium caseinate, ⁇ -lactalbumin, ⁇ -lactoglobulin, and mixtures thereof.
- the milk protein is sodium caseinate.
- Casein is a protein from milk which is poorly soluble in water. It is mainly obtained by precipitation by adding an acid (acid casein) or rennet (rennet casein) to milk. Casein consists of a mixture of casein a, casein b and casein k with molar masses between 19000 and 25000g / mol.
- caseinate is meant, for example, a casein salt, the counteranion of which is chosen from the group consisting of: calcium, potassium, ammonium, sodium and magnesium.
- the pH of emulsion A is preferably between 4 and 9.
- the water present in the emulsion can, in some cases, come from an aqueous solution, for example an aqueous solution obtained from plants, such as from the sap of a plant obtained from crushing the plant.
- the emulsion A further comprises a base, preferably chosen from mineral bases, and preferably, from NaOH and KOH.
- the amount of base can be between 0.05 and 1.5% by weight.
- composition B comprises an oil
- emulsion A does not include a base
- emulsion A can also comprise at least one lipophilic or hydrophilic active principle.
- emulsion A comprises droplets of composition B in a continuous polyol phase
- the active ingredient may be contained in the droplets of composition B or in the continuous polyol phase.
- the active principle when the active principle is lipophilic, it can be contained in the droplets of composition B, and when the active principle is hydrophilic, it can be contained in the continuous polyol phase.
- the active principle can be a solid or a liquid.
- the active principle can be in suspension, in particular in the continuous polyol phase.
- the concentration of active principle in emulsion A can be between 0.01 and 30% by weight, preferably between 1 and 25% by weight.
- the lipophilic active principle is a perfume.
- the concentration of perfume in emulsion A is between 0.01 and 30% by weight.
- the perfume can be contained in the droplets of composition B.
- emulsion A does not include an organic solvent and / or a surfactant other than the milk protein.
- emulsion A comprises less than 0.1% by weight of organic solvent and / or surfactant other than milk protein, preferably less than 0.01% by weight.
- Emulsion A can be used in the preparation of biodegradable thermoplastic granules and films.
- Emulsion A can also be used in plastics, cosmetics, pharmaceuticals, or the food industry.
- emulsion A makes it possible to encapsulate active ingredients, such as perfumes, and can therefore be used in many fields of application.
- emulsion A is used in cosmetics.
- the invention therefore also relates to the use of emulsion A in cosmetics.
- emulsion A comprises droplets of composition B comprising oleic acid and optionally an oil, in a continuous polyol phase, said emulsion A comprising: a. between 20 and 90% by weight of at least one polyol, typically glycerol, preferably between 20 and 89.99%, preferably between 50 and 85%, and more preferably between 60 and 80%; b. between 9 and 75% by weight, preferably between 10 and 50%, and preferably between 15 and 40%, of composition B; vs. between 0.01 and 1% by weight of at least one milk protein, typically sodium caseinate, preferably between 0.05 and 0.75%, and preferably between 0.1 and 0.5%; d. between 1 and 15% by weight of water, preferably between 1.5 and 10%, and preferably between 2 and 7%
- emulsion A comprises droplets of composition B comprising oleic acid and optionally an oil, in a continuous polyol phase, said emulsion A comprising: a. between 20 and 90% by weight of at least one polyol, typically glycerol, preferably between 50 and 85%, and preferably between 60 and 80%; b. between 9 and 75% by weight, preferably between 10 and 50%, and preferably between 15 and 40%, of composition B; vs. between 0.01 and 1% by weight of at least one milk protein, typically sodium caseinate, preferably between 0.05 and 0.75%, and preferably between 0.1 and 0.5%; d. between 1 and 15% by weight of water, preferably between 1.5 and 10%, and preferably between 2 and 7%; e. between 0.01 and 30% by weight of an active principle, for example of a perfume.
- the invention also relates to a process for preparing an emulsion A comprising the following steps:
- the method is preferably carried out at a temperature between 17 and 22 ° C.
- emulsion A comprises a base
- the latter can be added in step 2 with the polyol, or after the addition of composition B.
- the base can be in the form of a basic aqueous solution.
- the base, or the basic aqueous solution is mixed with at least part of the polyol. The resulting mixture is then added to emulsion A.
- Emulsion A as described above can be used in the manufacture of a thermoplastic granule.
- This emulsion makes it possible in particular to homogeneously introduce a hydrophobic agent, the monounsaturated fatty acid, to a thermoplastic material, in order to improve its properties, in particular the mechanical properties, the properties of permeability to water vapor and / or the water adsorption of the films.
- This emulsion also makes it possible to introduce active ingredients, such as perfumes, into the thermoplastic granules.
- the invention also relates to a process for preparing thermoplastic granules comprising the following steps:
- composition to be extruded preferably comprising i) at least one casein and / or at least one caseinate, and ii) at least one plasticizer;
- the method is carried out with a rotational speed of the extruder of between 100 and 150 rpm, and at a temperature of between 70 and 120 ° C.
- the composition to be extruded comprises i) at least one casein and / or at least one caseinate, and ii) at least one plasticizer, preferably chosen from polyols, glycerol acetates, glycerol propionates and their mixtures.
- the composition to be extruded can also comprise iii) water and, optionally, iv) a surfactant.
- Thermoplastic granules [0076]
- the invention also relates to thermoplastic granules obtained by the process described in the present application.
- These granules can comprise microstructures comprising composition B.
- the shape of the microstructures is preferably substantially spherical.
- thermoplastic granules comprise: a. between 50 and 80% by weight of casein and / or caseinate, preferably between 52 and 75%, and more preferably still between 55 and 70%; b. between 4 and 16% by weight of water, preferably between 4.5 and 15%, and, more preferably still, between 5 and 11%; vs. between 10 and 35% by weight of at least one polyol, preferably between 12 and 32%, and, more preferably still, between 15 and 28%; d. between 0.1 and 8% by weight of a monounsaturated fatty acid, preferably between 0.5 and 6%, and, more preferably still, between 1 and 4%; e.
- the active principle can be a perfume.
- the polyol is chosen from polyols comprising at least 3 carbon atoms and having a ratio R of the number of carbon atoms / number of —OH functions ⁇ 2, preferably, the polyol is chosen from glycerol, propan-1,3-diol, sorbitol and their mixtures.
- the polyol is glycerol, which can be at least partly of plant origin.
- the monounsaturated fatty acid can be selected from oleic acid, palmitoleic acid, erucic acid, and mixtures thereof.
- the monounsaturated fatty acid is oleic acid.
- the monounsaturated fatty acid comes from composition B.
- thermoplastic granules can be biodegradable and / or edible.
- the invention also relates to an object obtained after transformation by extrusion cast (in French “extrusion in flat die”), extrusion blow molding, extrusion inflation, solvent process (in English “solvent cast”), calendering, injection, thermoforming or spinning of thermoplastic granules.
- the invention also relates to a method for producing a film from the above thermoplastic granules, or from thermoplastic granules. obtained according to the process described in the present application, said process comprising a step of converting the granules into a film, preferably by inflation extrusion.
- the invention also relates to a thermoplastic film obtained by this process.
- the thermoplastic film can be biodegradable and / or edible.
- the film can be printed.
- the film has a thickness of between 15 and 100 microns, preferably between 30 and 80 microns and more preferably between 40 and 70 microns.
- the film can be used to package various products
- the product can be in solid or liquid form.
- the emulsions are prepared as follows: the milk protein is dissolved in water at room temperature. Said solution is then mixed with a polyol. Composition B is then incorporated via a mechanical stirrer (IKA Ultraturrax type or 6-blade turbine) at room temperature. When the emulsion comprises NaOH, NaOH crystals are dissolved in water at a concentration of 35% by mass at room temperature. This solution can either be mixed with the initial solution of the milk protein or mixed with glycerol in a glycerol / NaOH mass ratio of 25. In the latter case, this mixture is then added to the mixture obtained previously.
- Comparative example 1 sodium caseinate is replaced by acacia gum
- Comparative example 2 oleic acid is replaced by hexanoic acid
- Comparative example 3 oleic acid is replaced by palmitic acid (saturated fatty acid)
- the droplet diameter was measured by confocal microscopy for emulsions 6, 7, 8 and 12.
- the droplets are monodisperse and the average droplet diameter is 20 ⁇ m.
- the droplets represent approximately 59% of the total volume of the emulsion.
- the droplets are monodisperse, and the average droplet diameter is less than 10 ⁇ m.
- the droplets are polydisperse, and the diameter of the droplets is between 20 and 150 ⁇ m.
- the droplets are monodisperse and the average droplet diameter is 2 ⁇ m.
- Nile red corresponds to the continuous phase of glycerol
- dark gray corresponds to droplets of oleic acid
- light gray corresponds to sodium caseinate . This shows that Nile red is indeed present in the droplets of oleic acid and that it is possible to incorporate an active principle in the droplets.
- the results obtained with glutaraldehyde are presented in FIG. 2.
- the black corresponds to the continuous phase of glycerol, and to the droplets of oleic acid.
- Light gray corresponds to sodium caseinate. This shows that sodium caseinate is present at the interface between the oleic acid droplets and glycerol.
- Emulsions comprising perfume
- Emulsions comprising perfume as an active principle have also been prepared.
- the emulsions were prepared as described above, by adding the perfume in composition B.
- the different formulations are presented in Table 2. [0103] [Table 2]
- composition B comprising perfume
- composition B comprising perfume
- an active ingredient such as perfume
- Emulsion comprising an aqueous solution obtained from a fatty plant
- Thermoplastic granules were prepared from sodium caseinate and the emulsion according to Example 12, 15 or 16.
- the extruder used is a BC 21 twin-screw co-rotating extruder of the Clextral® brand, of diameter 25 mm, center distance 21 mm and length 900 mm. This extruder has at least 4 zones: a. a first introduction zone, b. a second zone of introduction, c. a third degassing zone, d. a fourth sector area.
- the speed of rotation of the twin-screws is 125 rpm and the temperatures of the different zones are between 70 and 120 ° C.
- the first zone of the extruder is a zone for introducing the powders: caseinate and lecithin.
- the liquids plasticizers and the emulsion according to Example 12
- the extruder further comprises a degassing zone in the open air and a final zone consisting of a cylindrical rod die with a diameter of 4 mm.
- the screw profile is as follows: 750 mm direct-pitch screw, 50 mm mixing screw, 100 mm reverse-pitch screw.
- the rod On leaving the extruder, the rod is dried and introduced into a granulator to give granules 2 to 3 mm in diameter.
- thermoplastic granules obtained are presented in Table 4. [0112] [Table 4]
- thermoplastic granules 1 and 2 obtained were observed by scanning electron microscopy.
- the photos obtained are shown in Figures 6 and 7. They show that the thermoplastic granules obtained with the emulsion according to the invention do indeed include microstructures comprising oleic acid.
- thermoplastic granules 3 and 4 The fragrance present in thermoplastic granules 3 and 4 was extracted 3 times with ethanol. The level of perfume extracted was then determined by CPG-SM (GC-MS). For the thermoplastic granules 3, the level of perfume is 89%, that is to say that 89% of the perfume introduced is found by CPG-MS analysis in the granules 3. For the thermoplastic granules 4, the level of perfume is 59%, that is to say that 59% of the perfume introduced is found by GC-MS analysis in the granules 4.
- CPG-SM CPG-SM
- Thermoplastic granules were obtained according to the process described above.
- the compositions of the granules are shown in Table 3. [0117]
- the granules were then transformed into a film with an average thickness of 60 ⁇ m ⁇ 10 ⁇ m by inflation extrusion.
- Each specimen was conditioned in a climatic chamber for a minimum of 48 hours at 50% relative humidity.
- each formulation in the form of a film is cut using a cookie cutter to obtain a square of dimension 5 x 5 cm, then is conditioned in a climatic chamber for at least 24 hours at 23 ° C, 50% relative humidity. Film thickness is measured at three separate locations and the results are averaged. The film is then placed in a slide frame and sealed with screws.
- the sample positioned in the frame is suspended by a metal rod and then immersed in a one liter beaker filled with 600mL of water at 20 ° C, with stirring at 300 rpm.
- the frame is 1 cm from the bottom of the beaker.
- the stopwatch starts from the moment the sample is placed in the beaker of water. We note the time it takes for the sample to pierce. Each test is repeated 5 times. The times recorded are normalized by the reference thickness according to the formula
- the water vapor permeability of the various films was characterized according to the gravimetric method according to the ASTM E96 / E96M standard in order to determine the water vapor permeability (Water Vapor Permeability, or WVP) of films of sodium caseinate.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1912158A FR3102366B1 (fr) | 2019-10-29 | 2019-10-29 | émulsion utilisable notamment comme auxiliaire technologique dans le domaine des plastiques, ou comme système d’encapsulation d’actifs, son procédé de préparation et ses applications |
| PCT/FR2020/051963 WO2021084211A1 (fr) | 2019-10-29 | 2020-10-29 | Émulsion utilisable notamment comme auxiliaire technologique dans le domaine des plastiques, ou comme système d'encapsulation d'actifs, son procédé de préparation et ses applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4051240A1 true EP4051240A1 (fr) | 2022-09-07 |
Family
ID=69375563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20807846.9A Pending EP4051240A1 (fr) | 2019-10-29 | 2020-10-29 | Émulsion utilisable notamment comme auxiliaire technologique dans le domaine des plastiques, ou comme système d'encapsulation d'actifs, son procédé de préparation et ses applications |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4051240A1 (fr) |
| FR (1) | FR3102366B1 (fr) |
| WO (1) | WO2021084211A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895222B (zh) * | 2006-06-16 | 2012-01-11 | 齐红 | 一种微乳液及其载药制剂的制备方法及应用 |
| FR2963013B1 (fr) | 2010-07-23 | 2014-10-24 | Univ Jean Monnet | Granule thermoplastique a base de caseine et/ou de caseinate, composition et procede de fabrication |
| FR3075215B1 (fr) * | 2017-12-19 | 2020-11-20 | Lactips | Materiau thermoplastique biodegradable a base de caseine et/ou de caseinate |
-
2019
- 2019-10-29 FR FR1912158A patent/FR3102366B1/fr active Active
-
2020
- 2020-10-29 EP EP20807846.9A patent/EP4051240A1/fr active Pending
- 2020-10-29 WO PCT/FR2020/051963 patent/WO2021084211A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021084211A1 (fr) | 2021-05-06 |
| FR3102366A1 (fr) | 2021-04-30 |
| FR3102366B1 (fr) | 2021-12-03 |
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