Classifications

• • 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
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0021—Dye-stain or dye-transfer inhibiting compositions
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/74—Carboxylates or sulfonates esters of polyoxyalkylene glycols
• • 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
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3723—Polyamines or polyalkyleneimines
• • 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
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3942—Inorganic per-compounds

Definitions

• the present invention relates to a laundry composition and to its use as an auxiliary of a laundry detergent composition.
• the present invention further relates to a method of washing a garment. It also relates to the use of a laundry composition for the removal of stains from a garment. It further relates to the use of a laundry additive for avoiding or reducing colour fading or a garment being washed with a detergent system comprising a laundry detergent composition and the laundry additive.
• Oxygen-based bleaches are added to laundry compositions to enhance the bleach activity of these.
• Laundry compositions such as acidic laundry additives, which comprise oxygen-based bleaches, are usually added in addition to the usual laundry detergent composition to enhance the bleach activity.
• the oxygen-based bleach may be hydrogen peroxide or a precursor thereof, for example an inorganic perhydrate salt (such as a persulphate, perborate or percarbonate, such as an alkali metal salt thereof, e.g. sodium percarbonate, or an organic peracid or salt thereof.
• the most common bleach precursor is sodium percarbonate. Despite its effectiveness, sodium percarbonate still has drawbacks. The percarbonate needs to break down to release the peroxide and this is a highly temperature-dependent reaction. Hydrogen peroxide is then the preferred bleach precursor.
• dye- transfer inhibitors and/or dye fixatives are added to laundry compositions to control dye transfer from coloured to light fabrics and to control colour fading from a coloured fabric.
• a dye transfer inhibitor traps and disperses dye particles, which avoids redeposition of the particles on fabrics.
• a dye fixative avoids bleeding of the colour from a fabric during washing. Therefore, it can be said that a dye transfer inhibitor is in general responsible for the reduction of colour transfer, whilst a dye fixative is responsible for the reduction of colour fading.
• Laundry compositions comprising hydrogen peroxide, dye fixatives and/or dye transfer inhibitors might become unstable due to the reaction of these compounds between them and with other components of the compositions. These instabilities lead to, for example, changes on the appearance of the composition, reduction of the viscosity of the formulation with time, reduction of the amount of available bleach in the composition, reduction of the dye transfer inhibitor activity in the composition, or dye reduction of the dye fixative activity in the composition.
• compositions comprising hydrogen peroxide and a dye fixative comprising or consisting of a copolymer of dimethylamine and epichlorohydrin, are stable and effective at removing stains and reducing colour fading and colour transfer, if the compositions comprise at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide, and combinations thereof.
• the detergent composition can be used as a laundry additive for washing machine or for soaking in handwash and pre-treatment.
• the composition provides colour fixation of dyes onto the fabrics, reducing colour fading and colour transfer from one fabric to another during the washing process.
• “Laundry composition” as used in the present application means: composition which can be used for pre-treating a garment before washing the garment with a laundry detergent, and/or that can be used alone for washing a garment, and/or that can be used together with the laundry detergent during washing of the garment. In other words, the laundry composition can be used alone for washing a garment or can be used as a laundry additive.
• “Laundry detergent composition” as used in the present application means: composition used solely for the cleaning of garments and whose main action is the removal of grim and dirt, comprising a builder and not having lipases.
• “Laundry additive” as used in the present application means: composition which is used for providing a specific consumer benefit, such as: removal of stains, reduction or elimination of fading, and/or reduction or elimination of colour transfer. This means that the mean action of a laundry additive is not the removal or grip and dirt. Furthermore, a laundry additive is commonly used as a pre-treatment or together with a laundry detergent composition.
• substantially free as used in the present patent application means that a compound has not been deliberately added to the composition.
• substantially free of anionic surfactants means that no anionic surfactant has been added to the composition. In other words, if traces of a compound that has not been deliberately added to the composition are present, it does not change the effect of the composition.
• Donor as used in the present patent application means: fabric material susceptible of releasing its colour when submerged in a washing liquor. These are coloured fabrics dyed with direct dye and are normally coupled.
• the present invention relates to a laundry composition
• a laundry composition comprising hydrogen peroxide, at least one dye fixative, and a first surfactant system
• said at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin
• said first surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide, and combinations thereof.
• the alkyl chain of said ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide has between 10 and 18 carbon atoms, preferably between 12 and 16 carbon atoms.
• said first surfactant system comprises or consists of at least one non ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having between 6.5 and 10 mol of ethylene oxide or between 7 and 10 mol of ethylene oxide, and combinations thereof, preferably wherein said first surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols having between 6.5 and 8 mol of ethylene oxide or between 7 and 8 mol of ethylene oxide, and combinations thereof.
• said composition comprises a second surfactant system comprising or consisting of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, ethoxylated fatty acids, having less than 6 mol of ethylene oxide, and combinations thereof; preferably wherein said second surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, ethoxylated fatty acids, having between 3 and 5 mol of ethylene oxide and combinations thereof; more preferably wherein said second surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols having between 3 and 5 mol of ethylene oxide and combinations thereof.
• the weight ratio of said second surfactant system to said first surfactant system is between 0:1 and 0.25:1, preferably between 0:1 and 0.20:1 , more preferably 0:1 and 0.12:1, even more preferably 0:1.
• the composition comprises between 1 wt.% and 30 wt.% of said first surfactant system, based on the total weight of the composition, preferably between 2.5 wt.% and 25 wt.%, more preferably between 5 wt.% and 20 wt.%, even more preferably between 7.5 wt.% and 15 wt.%.
• the composition is substantially free of linear alkyl benzene sulphonate, sodium lauryl ether sulphate, and/or secondary alkane sulphonates, preferably wherein the composition is substantially free of anionic surfactants.
• the composition is free of linear alkyl benzene sulphonate, sodium lauryl ether sulphate, and/or secondary alkane sulphonates, preferably wherein the composition is free of anionic surfactants.
• the at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin.
• said composition comprises between 0.01 wt.% and 10 wt.% of said at least one dye fixative, based on the total weight of the composition, preferably between 0.05 wt.% and 5 wt.%, more preferably between 0.1 wt.% and 4 wt.%, even more preferably between 0.25 wt.% and 3 wt.%, most preferably between 0.5 wt.% and 2.5 wt.%.
• the composition comprises between 0.5 wt.% and 30 wt.% of hydrogen peroxide, based on the total weight of the composition, preferably between 1 wt.% and 25 wt.%, more preferably between 2.5 wt.% and 20 wt.%, even more preferably between 5 wt.% and 15 wt.%, most preferably between 5 wt.% and 10 wt.%.
• the composition further comprises a dye transfer inhibitor, preferably selected from polyvinylalcohol, fatty amides, sodium carboxylmethyl cellulose, hydroxypropyl methyl cellulose, polyvinylpyrollidone, polyvinylimidazole, polyvinyloxazolidone, polyamine N-oxide polymers, copolymers of N-vinylpyrollidone and N-vinylimidazole, and combinations thereof, more preferably wherein the composition comprises between 0.01 wt.% and 10 wt.% of said at dye transfer inhibitor, based on the total weight of the composition, most preferably 0.05 wt.% and 5 wt.%, most preferably between 0.5 wt.% and 2.5 wt.%.
• a dye transfer inhibitor preferably selected from polyvinylalcohol, fatty amides, sodium carboxylmethyl cellulose, hydroxypropyl methyl cellulose, polyvinylpyrollidone, polyvinylimidazole, polyvinyloxazolid
• the composition has a pH measured at 20°C of less than 7, preferably less than 6, more preferably between 3 and 6, even more preferably between 3.5 and 5.5.
• the composition is a liquid, preferably having a viscosity measured at 100 rpm and 20°C of between 1 mPa-s and 10 mPa-s, more preferably of between 2.5 mPa-s and 7.5 mPa-s, even more preferably of between 3 mPa-s and 6 mPa-s.
• the composition is a laundry additive.
• the present invention relates to a method of washing a garment, comprising:
• the present invention relates to a use of the laundry composition according to the first aspect as a laundry additive.
• the present invention relates to a use of the laundry composition according to the first aspect for the removal of stains from a garment.
• the present invention relates to a use of the laundry additive comprising hydrogen peroxide, at least one dye fixative, and a first surfactant system;
• said at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin
• said first surfactant system comprises or consists of at least one non ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide, and combinations thereof for reducing or eliminating colour fading and/or colour transfer of garments being washed with said detergent system.
• the present invention relates to a laundry composition
• a laundry composition comprising hydrogen peroxide, at least one dye fixative, and a first surfactant system
• said at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin
• said first surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide, and combinations thereof. It will be understood that any of the non-ionic surfactants in this list must have more than 6 mol of ethylene oxide.
• the laundry composition according to the invention has stain removal properties and reduces or eliminates colour fading of a garment being washed with said composition.
• the stain removal properties would be given by the first surfactant system and the hydrogen peroxide, whilst the reduction or elimination of colour fading would be given by the at least one dye fixative.
• the dye fixative is adsorbed onto the fibre surface during a laundry operation, reducing the release of dyes and the fading of the fabrics.
• the laundry composition according to the invention reduces or eliminates colours transfer between garments of different colour, for example, from coloured garments onto white garments when these are washed together. This eliminates sorting of garments per colour when these are going to be washed.
• the laundry composition according to the invention may be a laundry additive and may be suitable for pre-treatment and/or use alongside a laundry detergent composition.
• a laundry composition according to the invention remains stable over a period of at least 12 weeks at temperatures between 5 °C and 40 °C. This stability is evidenced because the colour and appearance, the amount of oxygen-based bleach of the composition and/or the pH do not significantly change with time.
• compositions comprising hydrogen peroxide and at least one dye fixative are stable because of the first surfactant system comprising or consisting of ethoxylated compounds having more than 6 mol of ethylene oxide.
• the alkyl chain of ethoxylated compounds such as ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids having more than 6 mol of ethylene oxide, has between 10 and 18 carbon atoms, preferably between 12 and 16 carbon atoms.
• the non-ionic surfactant comprises a hydrophilic part (ethylene oxide) and a hydrophobic alkyl chain.
• said first surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having between 6.5 and 10 mol of ethylene oxide or between 7 and 10 mol of ethylene oxide, and combinations thereof, preferably wherein said first surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols having between 6.5 and 8 mol of ethylene oxide or between 7 and 8 mol of ethylene oxide, and combinations thereof.
• ethoxylated alcohols having an alkyl chain with 10 to 18 carbon atoms and between 6.5 and 8 mol of ethylene oxide provide excellent stability to compositions comprising hydrogen peroxide and at least one dye fixative.
• the ethoxylated primary or secondary linear or branched alcohols in the first surfactant system can be represented by the following formula:
• R 1 (C 2 H 4 0) n 0H wherein R 1 is a straight or branched C10-C18 alkyl chain, preferably a C12-C16 alkyl chain; and n is higher than 6, for example n can be between 6.5 and 8 or between 7 and 8.
• ethoxylated alcohols with an alkyl chain with 10 to 18 carbon atoms and 7 or 8 moles of ethylene oxide are Safol ® 23E7 and Lutensol ® AO 8.
• the laundry composition may comprise a second surfactant system comprising or consisting of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, ethoxylated fatty acids, having less than 6 mol of ethylene oxide, and combinations thereof; preferably wherein said second surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, ethoxylated fatty acids, having between 3 and 5 mol of ethylene oxide and combinations thereof; more preferably wherein said second surfactant system comprises or consists of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols having between 3 and 5 mol of ethylene oxide and combinations thereof.
• ethoxylated primary or secondary linear or branched alcohols having between 3 and 5 mol of ethylene oxide or combinations thereof are Lorodac ® 3-24, which has 3 mol of ethylene oxide, and Safol ® 23E5, which has 5 mol of ethylene oxide.
• the composition may comprise between 1 wt.% and 30 wt.% of said first surfactant system, based on the total weight of the composition, preferably between 2.5 wt.% and 25 wt.%, more preferably between 5 wt.% and 20 wt.%, even more preferably between 7.5 wt.% and 15 wt.%.
• the weight ratio of said second surfactant system to said first surfactant system is between 0:1 and 0.25:1 , preferably between 0:1 and 0.20:1, more preferably 0:1 and 0.12:1 , even more preferably 0:1.
• the ratio of said second surfactant system to said first surfactant system is 0:1 , meaning that preferably the composition only contains the first surfactant system.
• the composition comprises only the first surfactant system and does not contain any other surfactant.
• the laundry composition may comprise one or more further surfactants.
• the one or more further surfactants may be selected from the group consisting of anionic surfactants, non ionic surfactants, cationic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof; preferably the one or more further surfactants are selected from the group consisting of non-ionic surfactants, anionic surfactants and combinations thereof.
• suitable surfactants are described in Kirk Othmer's Encyclopaedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems".
• the composition is substantially free of linear alkyl benzene sulphonate, sodium lauryl ether sulphate, and/or secondary alkane sulphonates, preferably wherein the composition is substantially free of anionic surfactants.
• Anionic surfactants such as linear alkyl benzene sulphonate, sodium lauryl ether sulphate, and/or secondary alkane sulphonates may adversely affect the stability of the laundry compositions and the activity of the at least one dye fixative.
• the composition is free of linear alkyl benzene sulphonate, sodium lauryl ether sulphate, and/or secondary alkane sulphonates, preferably the composition is free of anionic surfactants.
• the laundry composition comprises at least one dye fixative, which is responsible for the reduction or elimination of fading and colour transfer.
• Said at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin.
• a copolymer of dimethylamine and epichlorohydrin is cationic.
• An example of such dye fixative is TexCare ® DFC 6 ex. Clariant.
• the composition may comprise between 0.01 wt.% and 10 wt.% of said at least one dye fixative, based on the total weight of the composition, preferably between 0.05 wt.% and 5 wt.%, more preferably between 0.1 wt.% and 4 wt.%, even more preferably between 0.25 wt.% and 3 wt.%, most preferably between 0.5 wt.% and 2.5 wt.%.
• the composition may comprise between 0.5 wt.% and 30 wt.% of hydrogen peroxide, based on the total weight of the composition, preferably between 1 wt.% and 25 wt.%, more preferably between 2.5 wt.% and 20 wt.%, even more preferably between 5 wt.% and 15 wt.%, most preferably between 5 wt.% and 10 wt.%.
• the laundry composition comprises: between 5 wt.% and 10 wt.% of hydrogen peroxide, based on the total weight of the composition; between 0.5 wt.% and 2.5 wt.% of at least one dye fixative comprising or consisting of a copolymer of dimethylamine and epichlorohydrin; between 7.5 wt.% and 15 wt.% of a first surfactant system comprising or consisting of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols having between 6.5 and 8 mol of ethylene oxide or between 7 and 8 mol of ethylene oxide and combinations thereof; and wherein the alkyl chain of said ethoxylated primary or secondary linear or branched alcohols, has between 12 and 16 carbon atoms; a second surfactant system comprising or consisting of at least one non-ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched
• the composition may further comprise a dye transfer inhibitor, preferably selected from polyvinylalcohol, fatty amides, sodium carboxyl methyl cellulose, hydroxypropyl methyl cellulose, polyvinylpyrollidone, polyvinylimidazole, polyvinyloxazolidone, polyamine N- oxide polymers, copolymers of N-vinylpyrollidone and N-vinylimidazole, and combinations thereof, more preferably wherein the composition comprises between 0.01 wt.% and 10 wt.% of said at dye transfer inhibitor, based on the total weight of the composition, most preferably 0.05 wt.% and 5 wt.%, most preferably between 0.5 wt.% and 2.5 wt.%.
• a dye transfer inhibitor preferably selected from polyvinylalcohol, fatty amides, sodium carboxyl methyl cellulose, hydroxypropyl methyl cellulose, polyvinylpyrollidone, polyvinylimidazole, polyvinylox
• the present inventors have observed that by further adding a dye transfer inhibitor, the stability of the composition is not adversely affected.
• the pH of the composition measured at 20°C may be of less than 7, preferably less than 6, more preferably between 3 and 6, even more preferably between 3.5 and 5.5.
• the laundry composition may be liquid, preferably having a viscosity measured at 100 rpm and 20°C of between 1 mPa-s and 10 mPa-s, more preferably of between 2.5 mPa-s and 7.5 mPa-s, even more preferably of between 3 mPa-s and 6 mPa-s.
• the laundry composition is a laundry additive.
• Said laundry additive is normally acidic.
• the formulation may further comprise one or more additives selected from the group consisting of a rheology modifier agent, a fragrance, a phase stabilizer, a dye, a softening agent, a chelating agent, an anti-bacterial agent, a transition metal compound, an optical brightener, an anti-foaming agent, a preservative, and combinations thereof.
• a rheology modifier agent selected from the group consisting of a fragrance, a phase stabilizer, a dye, a softening agent, a chelating agent, an anti-bacterial agent, a transition metal compound, an optical brightener, an anti-foaming agent, a preservative, and combinations thereof.
• Exemplary softening agents are organic water-soluble water softening agents, which include polycarboxylate polymers, such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphonates, monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono- di- and tri sued nates, carboxymethyloxysucdnates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, phosphonates, iminodisuednates, polyaspartic adds, butylated hydroxytoluene (BHT), phosphonate stabilisers such as, diethylenetriaminepenta (methylene phosphonic add and its corresponding pentasodium salt), DTP MP and DTPMA and hydroxy ethylidene diphosphonic add (HEDP).
• polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic
• water-soluble water softening agent are neutralised or partially neutralised carboxylic adds, such as dtric add, sucdnic add or maleic add, and/or a neutralised or partially neutralised polycarboxylic add, such as a polyacrylate of Mw: 4000-8000.
• citric acid is a softening agent, but it can also a preservative
• HEDP is a softening agent, but it is also a chelating agent.
• Thickening agents or gelling agents may be used for adjusting the rheological properties of the formulation.
• Suitable thickeners are polyacrylate polymers, xanthan gums and micro-fibrous cellulose (MFC).
• MFC micro-fibrous cellulose
• a specially preferred rheology modifying agent is a micro- fibrous cellulose.
• the invention relates to a method of washing a garment, comprising:
• the temperature of the washing liquor may be between 10°C and 60 °C, preferably between 20 °C and 45 °C.
• the present inventors have observed that the composition according to the first aspect of the invention reduces or eliminates fading and colour transfer even when the washing liquor has a high temperature, e.g. 40 °C.
• the method of washing a garment comprises:
• the invention relates to a use of the composition according to the first aspect as a laundry additive.
• the invention relates to a use of the laundry composition according to the first aspect for the removal of stains from a garment
• the present invention relates to a use of the laundry additive comprising hydrogen peroxide, at least one dye fixative, and a first surfactant system;
• said at least one dye fixative comprises or consists of a copolymer of dimethylamine and epichlorohydrin
• said first surfactant system comprises or consists of at least one non ionic surfactant selected from the group comprising ethoxylated primary or secondary linear or branched alcohols, ethoxylated alkyl phenol, and ethoxylated fatty acids, having more than 6 mol of ethylene oxide, and combinations thereof for reducing or eliminating colour fading and/or colour transfer of garments being washed with said detergent system.
• Table 1 shows one formulation according to the invention.
• Ethoxylated alcohol, C12-C14 + 7 EO means a branched or linear ethoxylated alcohol having 12 to 14 carbon atoms and 7 moles of ethylene oxide.
• Ethoxylated alcohol, C13-C15 + 8 EO means a branched or linear ethoxylated alcohol having 13 to 15 carbon atoms and 8 moles of ethylene oxide.
• Ethoxylated alcohol, C12-C16 + 3 EO means a branched or linear ethoxylated alcohol having 12 to 16 carbon atoms and 3 moles of ethylene oxide.
• the first surfactant system is C12-C14 + 7 EO and C13- C15 + 8 EO; whilst the second surfactant system is C12-C16 + 3 EO and ethoxylated alcohol with 5 EO.
• the dye fixative is a copolymer of dimethylamine and epichlorohydrin. This is commercially available as TexCare ® DFC 6 ex. Clariant.
• Table 2 shows formulations that are not according to the invention.
• perfumes perfumes, dyes, optical brightener, thickener, and/or antifoaming agents.
• ambient relative humidity refers to a humidity of between 50% and 70%.
• T able Stability of formulation 1 as a function of time at 50 ⁇ 2 °C and ambient humidity
• T able Stability of formulation 1 as a function of time at 60 ⁇ 2 °C and ambient humidity
• Table 10 Stability of formulation 1 as a function of time at -10 ⁇ 2 °C and ambient humidity
• Tables 4-10 demonstrate that formulation 1, according to the invention, is stable after at least 1 week, as there is not any significant change in parameters such as pH, %H2C>2, and colour and homogeneity. Indeed, formulation 1 remained stable over a period of at least 12 weeks at temperatures between 5 °C and 40 °C.
• the fabrics were washed by soaking them in 5 L of a washing liquor containing one of the detergent systems shown in Table 11 at 25 °C or 40 °C. The soaking was repeated a total of five times. Between each soaking the fabric was dried at room temperature, i.e. about 20°C.
• Table 11 shows the different detergent systems that were added to water with a hardness of 15 °f to obtain 5L of washing liquor and the temperature of the washing liquor.
• Table 11 Detergent systems and temperatures of washing liquor n table 11, the commercial detergent is Surf powder as sold in India.
• Colour fading was determined using a Datacolor 650 spectrophotometer and by measuring the total colour difference ( dE) of a donor fabric before washing and after 3 and 5 washings. This means that a lower dE represents less colour fading.
• Colour transfer Colour transfer was determined using a Datacolor 650 spectrophotometer and by measuring the total colour difference ( dE) of an acceptor fabric before washing and after having been washed with a donor fabric. Two acceptor fabrics were tested, a cotton one and a polyester one. The acceptor was added in the third and fifth washing of the donor fabric. This means that a lower dE represents less colour transfer.
• the washing was repeated a total of five times. Between each washing the fabric was dried at room temperature, i.e. about 20°C.
• Colour fading was determined using a Datacolor 650 spectrophotometer and by measuring the total colour difference ( dE) of a donor fabric before washing and after 1 , 3 and 5 washings. This means that a lower dE represents less colour fading.
• Colour transfer was determined using a Datacolor 650 spectrophotometer and by measuring the total colour difference ( dE) of an acceptor fabric before washing and after having been washed with a donor fabric.
• dE total colour difference
• a cotton/polyester white shirt was used (63% cotton, 34% polyester and 3% elastan), and it was added in the first, third and fifth washing of the donor fabric. This means that a lower dE represents less colour transfer.
• the fabrics were washed at 30 °C using water with a hardness of 15 °f and one of the detergent systems shown in Table 17 in a laundry washing machine with the following specifications: ⁇ Washing machine: AEG 600.
• the washing was repeated a total of three times. Between each washing the fabric was dried at room temperature, i.e. about 20°C.
• Table 17 Detergent systems n table 17, the commercial detergent is Ariel gel as sold in the UK.
• the dye transfer inhibitor is polyvinylpyrrolidone.
• Colour fading was determined using a Datacolor 650 spectrophotometer and by measuring the total colour difference ( dE) of a donor fabric before washing and after 1, 2 and 3 washings. This means that a lower dE represents less colour fading. Table 18. Colour fading in red and yellow fabrics
• Washing machine Bosch WAY 28740 IT. ⁇ Wash cycle: cotton, water in main wash: 15 L, time of main wash: 45 min.
• test swathes were dried at room temperature, i.e. about 20°C, and ironed with a domestic iron.
• Table 19 Detergent systems n table 19, the commercial detergent is Ariel gel as sold in the UK.
• Stain removal was determined using a Datacolor 650 spectrophotometer and by measuring the Y-value of the standard soil after washing. A higher Y-value represents a better stain removal. Table 20. Removal of enzymatic, bleachable and greasy stains.
• formulation 1 according to the invention, whilst providing protection against colour fading and colour transfer, is also suitable for the removal of stains. Furthermore, it is shown that when formulation 1 is used with a detergent composition, it provides better stain removal than when the detergent composition is used alone. It should be noted that formulation 1 enhances the removal of enzymatic, bleachable and greasy (detergency) stains, although formulation 1 does not contain any enzymes.

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  • 2020-11-27 GB GBGB2018682.1A patent/GB202018682D0/en not_active Ceased
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