EP2220288A1 - Process for treatment of a fabric - Google Patents

Process for treatment of a fabric

Info

Publication number
EP2220288A1
EP2220288A1 EP08861303A EP08861303A EP2220288A1 EP 2220288 A1 EP2220288 A1 EP 2220288A1 EP 08861303 A EP08861303 A EP 08861303A EP 08861303 A EP08861303 A EP 08861303A EP 2220288 A1 EP2220288 A1 EP 2220288A1
Authority
EP
European Patent Office
Prior art keywords
polymer
fabric
polymers
aqueous medium
carboxylic acid
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.)
Granted
Application number
EP08861303A
Other languages
German (de)
French (fr)
Other versions
EP2220288B1 (en
Inventor
Sameer Keshav Barne
Ditty Dixon
Aravindakshan Perincheery
Gopa Kumar Velayudhan Nair
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority to EP08861303A priority Critical patent/EP2220288B1/en
Publication of EP2220288A1 publication Critical patent/EP2220288A1/en
Application granted granted Critical
Publication of EP2220288B1 publication Critical patent/EP2220288B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • 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
    • 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
    • C11D3/3707—Polyethers, e.g. polyalkyleneoxides
    • 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
    • C11D3/3753—Polyvinylalcohol; Ethers or esters thereof
    • 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
    • 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
    • C11D3/3769—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
    • C11D3/3776—Heterocyclic compounds, e.g. lactam
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D06M15/09—Cellulose ethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
    • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/356—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/356—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms
    • D06M15/3562—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms containing nitrogen
    • 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

  • the present invention relates to a process for treatment of a fabric. It further relates to a composition and a kit for treatment of a fabric.
  • the invention will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this particular field of use.
  • US2006046950A (Penninger and Bastmaschine, 2006) teaches a detergent composition for cleaning textile materials comprising a combination of a soil release-capable alkyl or hydroxyalkyl cellulose derivative and a hygroscopic polymer selected from the class consisting of polypeptides, hydrogels, polyvinyl alcohol, the polyalkylene glycols, the homopolymers of acrylic acid, methacrylic acid, and maleic acid, copolymers of acrylic acid, methacrylic acid, and maleic acid and mixtures of the homo and copolymers.
  • the use of the hygroscopic polymers in combination with the cellulose derivatives is said to result in improved cleaning performance.
  • EP025696 (Unilever, 1988) teaches that improvement in soil suspension is achieved by adding mixture of vinyl pyrollidone polymer and a nonionic cellulose ether to a detergent composition.
  • GB994353 (Domestos, 1965) teaches that mixtures of certain polymeric materials, when incorporated into unbuilt detergent compositions based on synthetic surface active agents, provide enhanced anti-redeposition as compared to activity of individual polymers alone when added alone to same detergent compositions.
  • the cleaning compositions essentially comprise of a surfactant and the pH of wash liquor is alkaline or neutral.
  • US4007305 (Kakar et al, 1977) addresses the problem of providing satisfactory nondurable finishes to textiles which impart optimum soil release and soil repellent properties.
  • the textiles must be treated with an alkaline aqueous medium having pH value of 7.5-11 and containing water soluble hydrophilic soil release polymer having carboxylic acid groups and a dispersed hydrophobic soil repellent fluorochemical .
  • one of the objects of the present invention is to provide a process for reducing soiling of fabrics that can be easily used in the household.
  • Another object of the present invention is to provide a process of treatment of a fabric for reducing soiling of fabrics .
  • Yet another object of the present invention is to provide a process for treatment of a fabric that improves efficacy of subsequent cleaning.
  • Yet another object of the present invention is to provide a process for reducing soiling of fabrics that allows enhanced deposition of benefit agents, such as perfume and fluorescer .
  • Yet another object of the present invention is to provide a process for treatment of a fabric which is effective on various types of fabrics such as cotton, polyester and polycotton .
  • Yet another object of the present invention is to provide a process for treatment of a fabric which is relatively easy to practice in household.
  • the present inventors have surprisingly found that contacting a fabric in an aqueous medium having acidic pH with two different polymers, one comprising a plurality of hydroxyl groups and the other comprising a plurality of carbonyl or ether groups, increases deposition of polymer and provides benefits such as reduction in soiling, ease of subsequent cleaning and enhanced deposition of benefit agents .
  • a process for treatment of a fabric comprising the steps of contacting the fabric with polymers A and B in an aqueous medium, wherein; (a) polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
  • polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the aqueous medium has pH less than 6.
  • a composition for treatment of a fabric comprising 1-99% by weight polymer A, 1-99% by weight polymer B, and 0 to 10% by weight an acidic ingredient
  • polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid
  • polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the pH of 1% aqueous solution of the composition is less than 6.
  • kits for treatment of a fabric comprising the composition of the second aspect and a set of instructions for use.
  • the fabric that can be treated includes synthetic as well as natural textiles. Fabrics may be made of cotton, polycotton, polyester, silk or nylon. It is envisaged that the method of the present invention can be used to treat garments and other clothing and apparel materials that form typical washload in household laundry.
  • the household materials that can be treated according to the process of the present invention include, but are not limited to, bedspreads, blankets, carpets, curtains and upholstery.
  • the process of the present invention is described primarily for treatment of a fabric, it is envisaged that the process of the present invention can be advantageously used to treat other materials such as jute, leather, denim and canvass. It is envisaged that the process of the present invention can be used to treat articles such as shoes, rain-wear and jackets.
  • polymer A has a plurality of hydroxyl or carboxyl groups.
  • the polymer A has a molecular mass preferably from 300 to 10 9 .
  • the polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid.
  • polymer A according to the present invention include: (a) Homopolymer of vinyl alcohol or polyvinyl alcohol.
  • (c) Homopolymer of a carboxylic acid, i.e. polycarboxylic acid such as polyacrylic acid, polymaleic acid or copolymer of acrylic and maleic acid.
  • polycarboxylic acid such as polyacrylic acid, polymaleic acid or copolymer of acrylic and maleic acid.
  • Homopolymer or copolymer of vinyl alcohol has a molecular mass of preferably from 10,000 to 1,000,000, more preferably from 50,000 to 500,000 and most preferably from 50,000 to 200,000.
  • Commercially available polyvinyl alcohols that can be used include GOHSENOLĀ® (Nippon Synthetic Chemical Industry) , MOWIOLĀ® (Clariant) and POVALĀ® (Kuraray) .
  • Homopolymer or copolymer of alkylene glycol has a molecular mass of preferably from 4,000 to 20,000, more preferably from 5,000 to 15,000 and most preferably from 5,000 to 10,000.
  • Commercially available polyalkylene glycol can be used. Some examples of commercially available polyalkylene glycol include POLYGLYKOLĀ® (Clariant) and CARBOWAXĀ® (Union Carbide) .
  • Homopolymer or copolymer of carboxylic acid has a molecular mass of preferably from 2,000 to 10,000,000, more preferably from 50,000 to 1,000,000 and most preferably from 90, 000 to 500, 000.
  • Homopolymer or copolymer of saccharide has a molecular mass of preferably from 1000 to 10 9 , more preferably from 10000 to 10 9 and most preferably from 100,000 to 10 9 .
  • Polymer A may be synthetic or natural. However, synthetic polymer is preferred over natural polymer.
  • the polymer A is water soluble .
  • the polymer A is selected from a class consisting of homopolymers or copolymers of vinyl alcohol or carboxylic acid.
  • the homopolymer or copolymer of carboxylic acid is preferably a polyacrylic acid or a copolymer thereof.
  • examples include SOKALANĀ® PA (BASF) and CARBOPOLĀ® (Lubrizol) .
  • the amount of polymer A is preferably from 0.005 to 2, more preferably from 0.02 to 1, and most preferably from 0.05 to 0.5 mg per cm 2 area of the fabric.
  • fabric area refers to surface area of one side of the fabric.
  • polymer B has a monomeric unit comprising ether or carbonyl group.
  • Polymer B has a molecular mass preferably from 1000 to 10 9 .
  • the polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid.
  • Polymers and homopolymers of carboxylic acid and/or sacchharides and/or polyalkylene glycol/ether qualify to be selected both as polymer A or polymer B, as they comprise hydroxyl or carboxyl group and either a carbonyl or an ether group.
  • polymer A and polymer B are not of the same class. It is particularly preferred that the polymers A and B are selected from different classes of polymers. Without wishing to be limited by theory, it is believed that the two polymers A and B, when dissolved in water, form a complex with a solubility lower than each of the polymers A and B, which helps in enhanced deposition and other benefits .
  • Homopolymer or copolymer of vinyl pyrrolidone has a molecular mass of preferably from 1000 to 10000000, more preferably from 10,000 to 1,000,000 and most preferably from 30,000 to 500,000.
  • Commercially available polyvinyl pyrrolidone can be used, one example of which is LUVISKOLĀ® (BASF) .
  • Homopolymer or copolymer of poly alkylene oxide has a molecular mass greater than 20,000.
  • the molecular mass is preferably from 20,000 to 1,000,000, more preferably from
  • Homopolymer or copolymer of saccharide has a molecular mass of preferably from 1000 to 10 9 , more preferably from 10,000 to 10 9 and most preferably from 100,000 to 10 9 .
  • POLYOXĀ® (Dow Chemical Co) can be used according to the present invention.
  • Polymer B may be synthetic or natural. However, synthetic polymer is preferred over natural polymer.
  • the polymer B is water soluble.
  • the polymer B is selected from a class consisting of homopolymers or copolymers of vinyl pyrrolidone or alkylene oxide.
  • the amount of polymer B is preferably from 0.005 to 2, more preferably from 0.02 to 1, and most preferably from 0.05 to 0.5 mg per cm 2 area of the fabric.
  • Most preferred combinations of the polymers are the ones in the first three rows in the Table 1 above, i.e. PAA-PVP, PAA-PEO and PEG-PAA.
  • the two polymers are contacted with the fabric in an aqueous medium having pH less than 6.
  • the aqueous medium has pH preferably less than 5 and more preferably less than 4.
  • Aqueous medium has pH preferably greater than 1 and more preferably greater than 2.
  • the polymers may be chosen in such a way that when the polymers are added to the aqueous medium, pH of the aqueous medium is less than 6.
  • an acidic ingredient is added to aqueous medium to ensure that the pH of the aqueous medium is less than 6.
  • Acidic ingredients that reduce pH of resulting aqueous medium to less than 6 are well known to a person skilled in the art and any suitable acidic ingredient may be chosen.
  • the aqueous medium may comprise either polymer A, or polymer B, or both the polymers. Alternatively, one or both the polymers may be added to the aqueous medium during the process of the present invention.
  • Polymer A when mixed with the aqueous medium, is from 0.005 to 10%, more preferably from 0.05 to 5%, and most preferably from 0.05 to 2% by weight of the aqueous medium.
  • Polymer B when mixed with the aqueous medium, is from 0.005 to 10%, more preferably from 0.01 to 5%, and most preferably from 0.01 to 2% by weight of the aqueous medium.
  • the aqueous medium preferably comprises an electrolyte.
  • the electrolyte is preferably from 0.001 to 5%, more preferably from 0.01 to 1%, and most preferably from 0.04 to 0.2% by weight of the aqueous medium.
  • Electrolytes that can be used according to the present invention include water soluble ionic salts.
  • the cation of the salt includes an alkali metal, alkaline earth metal or trivalent metal cation.
  • the anion of the salt includes chloride, sulphate, nitrate and phosphate.
  • Some examples of electrolytes include chlorides, sulphates or nitrates of sodium, potassium, magnesium or calcium. Calcium salts are particularly preferred.
  • the aqueous medium comprises no more than 200 ppm anionic surfactant.
  • the aqueous medium comprises no more than 100 ppm, more preferably less than 50 ppm anionic surfactant. It is particularly preferred that the aqueous medium is substantially free of anionic surfactant.
  • the aqueous medium preferably comprises of at least one benefit agent.
  • the benefit agent that can be included in the aqueous medium includes, but not limited to ingredients such as perfume, fluorescer, deodorant, antibacterial agent, shading dye and bluing agent.
  • ingredients such as perfume, fluorescer, deodorant, antibacterial agent, shading dye and bluing agent.
  • the fabric is contacted with the polymers A and B either sequentially in any order, or simultaneously. Accordingly the fabric may be contacted with polymer A, followed by contacting with polymer B. Alternatively the fabric may be contacted with polymer B, followed by contacting with polymer A. The fabric may be simultaneously contacted with both the polymers A and B. Although the fabric may be contacted simultaneously with both the polymers, it is preferred that the fabric is contacted with the polymers sequentially, in any order. Process of contacting
  • the step of contacting the fabric with polymers A and B can be carried out in any suitable manner.
  • Polymers A, or polymer B, or both are mixed with the aqueous medium prior to contacting with the fabric.
  • polymer A may also be mixed with a nonaqueous medium including solvents such as alcohol and acetone prior to contacting with the fabric.
  • solvents such as alcohol and acetone
  • the polymer or polymers are mixed with the aqueous medium prior to contacting with the fabric.
  • the fabric may be dipped into the aqueous medium comprising one or more polymers.
  • the aqueous medium comprising one or both the polymers may be sprayed on the fabric.
  • either of the polymers A and B may be used in a form of abradable sticks which may be rubbed against the area of the fabric to be treated, followed by contact with the aqueous medium.
  • composition for treatment of a fabric comprising 1-99% by weight polymer A, 1-99% by weight polymer B, and 0 to 10% by weight an acidic ingredient wherein;
  • polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
  • polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the pH of 1% aqueous solution of the composition is less than 6.
  • the composition comprises preferably 5-95%, more preferably 10-90% and most preferably 20-80% by weight polymer A.
  • the composition comprises preferably 5-95%, more preferably 10- 90% and most preferably 20-80% by weight polymer B.
  • the polymers may be chosen in such a way that pH of 1% aqueous solution of the composition is less than 6.
  • an acidic ingredient is present in the composition at 0.1-10% by weight of the composition to ensure that the pH of 1% aqueous solution of the composition is less than 6.
  • Acidic ingredients that reduce pH of resulting aqueous medium to less than 6 are well known to a person skilled in the art and any suitable acidic ingredient may be chosen.
  • kits for treatment of a fabric comprising the composition of the second aspect and a set of instructions for use.
  • the polymers A and B are separately packaged, i.e. the polymers A and B are packaged individually in separate packs or in separate compartments of a twin compartment package.
  • Polymer A was polyacrylic acid of molecular mass 450000 in examples 1 and 2 and comparative examples 1-A to 2-B.
  • Polymer B was polyvinyl pyrrolidone of molecular mass 5 90000, in example 1 and comparative examples A and B.
  • Polymer B in example 2 and comparative examples C, D, and 2A was polyethylene oxide molecular mass 100,000.
  • PVA 124000 polyvinyl alcohol, molecular mass 125,000.
  • PVP 90000 polyvinyl pyrrolidone molecular mass 90,000.
  • Fabric was treated with polymer and dried. Dried fabric was dipped in carbon soot dispersion (150 ppm) in water which is stabilized by addition of sodium alkylbenzene sulfonate (50 ppm) . The fabric was then dried. The dried fabric was then cleaned with water, sodium carbonate (0.15% by weight) solution in water, and commercially available detergent (SURF EXCELĀ® 0.3% by weight) in water. Change in reflectance ( ā‡ R) was a measure of cleaning of fabric. Higher values of ā‡ R indicate better cleaning.
  • Polymer A was polyacrylic acid of molecular mass 2000 and polymer B was polyvinyl pyrrolidone of molecular mass
  • Example 6 both the polymers were used at 0.2 % by weight of the aqueous medium.
  • the pH of aqueous medium was 3.0.
  • polymers A and B were used alone, respectively, each at 0.4% by weight of the aqueous medium(pH 2.7 and 7.0, respectively) .
  • Comparative example L is for untreated fabrics (pH 7) .
  • the fabrics (cotton, polycotton and polyester) were cleaned according to the protocol given and the results are tabulated below
  • the cleaning efficacy for example 6 which is within scope of the present invention, is higher than the cleaning efficacy obtained in the comparative examples J, K and L which are outside the scope of the present invention.
  • the cleaning efficacy is better in case of washing with sodium carbonate or water.
  • the results show that cleaning efficacy is particularly enhanced for polycotton and polyester fabrics, when washing is with commercially available surfactant .
  • Polymer A was polyacrylic acid of molecular mass 450,000 and polymer B was polyvinyl pyrrolidone of molecular mass 1,300,000. In all the examples, both the polymers were used at 0.1 % by weight of the aqueous medium. The effect of electrolyte addition was studied by adding various electrolytes at 0.1% by weight of the total aqueous medium. The pH of aqueous media was in the range 2.7 to 3.0. The fabrics (cotton, polycotton and polyester) were cleaned using sodium carbonate (0.15% by weight) solution in water. The results are tabulated below in terms of cleaning efficacy.
  • the process of the present invention is capable of meeting the object of providing a process for treatment of fabric that reduces soiling of fabrics, improves efficacy of subsequent cleaning, allows enhanced deposition of benefit agents and is effective on various types of fabrics including cotton, polycotton and polyester.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Molecular Biology (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Detergent Compositions (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention provides a process for treatment of a fabric comprising the steps of contacting the fabric with polymers A and B in an aqueous medium, wherein; (a) polymer A is selected from the class of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and; (b) polymer B is selected from the class of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the aqueous medium has pH less than 6. The invention also provides a composition and a kit for treatment of a fabric.

Description

PROCESS FOR TREATMENT OF A FABRIC
Technical Field
The present invention relates to a process for treatment of a fabric. It further relates to a composition and a kit for treatment of a fabric. The invention will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this particular field of use.
Background and Prior Art Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field.
US2006046950A (Penninger and Bastigkeit, 2006) teaches a detergent composition for cleaning textile materials comprising a combination of a soil release-capable alkyl or hydroxyalkyl cellulose derivative and a hygroscopic polymer selected from the class consisting of polypeptides, hydrogels, polyvinyl alcohol, the polyalkylene glycols, the homopolymers of acrylic acid, methacrylic acid, and maleic acid, copolymers of acrylic acid, methacrylic acid, and maleic acid and mixtures of the homo and copolymers. The use of the hygroscopic polymers in combination with the cellulose derivatives is said to result in improved cleaning performance.
EP025696 (Unilever, 1988) teaches that improvement in soil suspension is achieved by adding mixture of vinyl pyrollidone polymer and a nonionic cellulose ether to a detergent composition. GB994353 (Domestos, 1965) teaches that mixtures of certain polymeric materials, when incorporated into unbuilt detergent compositions based on synthetic surface active agents, provide enhanced anti-redeposition as compared to activity of individual polymers alone when added alone to same detergent compositions.
US3771951 (Berni et al, 1973) and GB133803 (Gaf Corp, 1973) teach that detergent composition comprising a water soluble detergent and a mixture of water soluble polyvinyl alcohol and a water soluble poly vinyl pyrollidone exhibits enhanced degree of soil suspension
The above methods are reported to provide improved antiredeposition of soils and better cleaning of fabrics. However, reduction in subsequent post-wash soiling of fabrics is not reported. Further, the cleaning compositions essentially comprise of a surfactant and the pH of wash liquor is alkaline or neutral.
US4007305 (Kakar et al, 1977) addresses the problem of providing satisfactory nondurable finishes to textiles which impart optimum soil release and soil repellent properties. According to D5, the textiles must be treated with an alkaline aqueous medium having pH value of 7.5-11 and containing water soluble hydrophilic soil release polymer having carboxylic acid groups and a dispersed hydrophobic soil repellent fluorochemical .
On the other hand, various industrial treatments for fabric modification are known to render the fabric less prone to soiling. The fabric modification of this type is normally carried out during textile manufacture. The treatments, besides being substrate-specific, are relatively difficult to practise in household.
In view of the shortcomings of the prior art, one of the objects of the present invention is to provide a process for reducing soiling of fabrics that can be easily used in the household.
Another object of the present invention is to provide a process of treatment of a fabric for reducing soiling of fabrics .
Yet another object of the present invention is to provide a process for treatment of a fabric that improves efficacy of subsequent cleaning.
Yet another object of the present invention is to provide a process for reducing soiling of fabrics that allows enhanced deposition of benefit agents, such as perfume and fluorescer .
Yet another object of the present invention is to provide a process for treatment of a fabric which is effective on various types of fabrics such as cotton, polyester and polycotton .
Yet another object of the present invention is to provide a process for treatment of a fabric which is relatively easy to practice in household. The present inventors have surprisingly found that contacting a fabric in an aqueous medium having acidic pH with two different polymers, one comprising a plurality of hydroxyl groups and the other comprising a plurality of carbonyl or ether groups, increases deposition of polymer and provides benefits such as reduction in soiling, ease of subsequent cleaning and enhanced deposition of benefit agents .
Summary of the invention
According to a first aspect of the present invention there is provided a process for treatment of a fabric comprising the steps of contacting the fabric with polymers A and B in an aqueous medium, wherein; (a) polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
(b) polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the aqueous medium has pH less than 6.
According to a second aspect of the invention, there is provided a composition for treatment of a fabric comprising 1-99% by weight polymer A, 1-99% by weight polymer B, and 0 to 10% by weight an acidic ingredient wherein; (a) polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and; (b) polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the pH of 1% aqueous solution of the composition is less than 6.
According to a third aspect of the invention, there is provided a kit for treatment of a fabric comprising the composition of the second aspect and a set of instructions for use.
Detailed description of the invention
Fabric The fabric that can be treated includes synthetic as well as natural textiles. Fabrics may be made of cotton, polycotton, polyester, silk or nylon. It is envisaged that the method of the present invention can be used to treat garments and other clothing and apparel materials that form typical washload in household laundry. The household materials that can be treated according to the process of the present invention include, but are not limited to, bedspreads, blankets, carpets, curtains and upholstery. Although the process of the present invention is described primarily for treatment of a fabric, it is envisaged that the process of the present invention can be advantageously used to treat other materials such as jute, leather, denim and canvass. It is envisaged that the process of the present invention can be used to treat articles such as shoes, rain-wear and jackets.
Polymer A
According to the present invention, polymer A has a plurality of hydroxyl or carboxyl groups. The polymer A has a molecular mass preferably from 300 to 109. The polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid.
Some non-limiting examples of polymer A according to the present invention include: (a) Homopolymer of vinyl alcohol or polyvinyl alcohol.
(b) Homopolymer of ethylene or propylene glycol, i.e. polyethylene glycol and polypropylene glycol.
(c) Homopolymer of a carboxylic acid, i.e. polycarboxylic acid such as polyacrylic acid, polymaleic acid or copolymer of acrylic and maleic acid.
(d) Polysaccharides such as starch, cellulose, sodium alginate, natural gums, and their modified materials such as sodium carboxymethyl cellulose, hydroxyethyl cellulose.
Homopolymer or copolymer of vinyl alcohol has a molecular mass of preferably from 10,000 to 1,000,000, more preferably from 50,000 to 500,000 and most preferably from 50,000 to 200,000. Commercially available polyvinyl alcohols that can be used include GOHSENOLĀ® (Nippon Synthetic Chemical Industry) , MOWIOLĀ® (Clariant) and POVALĀ® (Kuraray) . Homopolymer or copolymer of alkylene glycol has a molecular mass of preferably from 4,000 to 20,000, more preferably from 5,000 to 15,000 and most preferably from 5,000 to 10,000. Commercially available polyalkylene glycol can be used. Some examples of commercially available polyalkylene glycol include POLYGLYKOLĀ® (Clariant) and CARBOWAXĀ® (Union Carbide) .
Homopolymer or copolymer of carboxylic acid has a molecular mass of preferably from 2,000 to 10,000,000, more preferably from 50,000 to 1,000,000 and most preferably from 90, 000 to 500, 000.
Homopolymer or copolymer of saccharide has a molecular mass of preferably from 1000 to 109, more preferably from 10000 to 109 and most preferably from 100,000 to 109.
Polymer A may be synthetic or natural. However, synthetic polymer is preferred over natural polymer.
According to a preferred aspect, the polymer A is water soluble .
It is preferred that the polymer A is selected from a class consisting of homopolymers or copolymers of vinyl alcohol or carboxylic acid.
The homopolymer or copolymer of carboxylic acid is preferably a polyacrylic acid or a copolymer thereof. Examples include SOKALANĀ® PA (BASF) and CARBOPOLĀ® (Lubrizol) . The amount of polymer A is preferably from 0.005 to 2, more preferably from 0.02 to 1, and most preferably from 0.05 to 0.5 mg per cm2 area of the fabric. The term "fabric area" as used herein refers to surface area of one side of the fabric.
Polymer B
According to the present invention, polymer B has a monomeric unit comprising ether or carbonyl group. Polymer B has a molecular mass preferably from 1000 to 109. The polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid.
Polymers and homopolymers of carboxylic acid and/or sacchharides and/or polyalkylene glycol/ether qualify to be selected both as polymer A or polymer B, as they comprise hydroxyl or carboxyl group and either a carbonyl or an ether group. However, according to an essential aspect, polymer A and polymer B are not of the same class. It is particularly preferred that the polymers A and B are selected from different classes of polymers. Without wishing to be limited by theory, it is believed that the two polymers A and B, when dissolved in water, form a complex with a solubility lower than each of the polymers A and B, which helps in enhanced deposition and other benefits .
Homopolymer or copolymer of vinyl pyrrolidone has a molecular mass of preferably from 1000 to 10000000, more preferably from 10,000 to 1,000,000 and most preferably from 30,000 to 500,000. Commercially available polyvinyl pyrrolidone can be used, one example of which is LUVISKOLĀ® (BASF) .
Homopolymer or copolymer of poly alkylene oxide has a molecular mass greater than 20,000. The molecular mass is preferably from 20,000 to 1,000,000, more preferably from
30,000 to 500,000 and most preferably from 50,000 to
200, 000
Homopolymer or copolymer of saccharide has a molecular mass of preferably from 1000 to 109, more preferably from 10,000 to 109 and most preferably from 100,000 to 109. Any commercially available poly alkylene oxide, for example
POLYOXĀ® (Dow Chemical Co) can be used according to the present invention.
Polymer B may be synthetic or natural. However, synthetic polymer is preferred over natural polymer.
According to a preferred aspect, the polymer B is water soluble.
It is particularly preferred that the polymer B is selected from a class consisting of homopolymers or copolymers of vinyl pyrrolidone or alkylene oxide.
The amount of polymer B is preferably from 0.005 to 2, more preferably from 0.02 to 1, and most preferably from 0.05 to 0.5 mg per cm2 area of the fabric.
Some examples of combinations of polymer A and polymer B, which are particularly preferred, are given below. Table 1 : Preferred combination of the polymers
Most preferred combinations of the polymers are the ones in the first three rows in the Table 1 above, i.e. PAA-PVP, PAA-PEO and PEG-PAA.
Aqueous medium
According to the invention, the two polymers are contacted with the fabric in an aqueous medium having pH less than 6. The aqueous medium has pH preferably less than 5 and more preferably less than 4. Aqueous medium has pH preferably greater than 1 and more preferably greater than 2.
The polymers may be chosen in such a way that when the polymers are added to the aqueous medium, pH of the aqueous medium is less than 6. Preferably, an acidic ingredient is added to aqueous medium to ensure that the pH of the aqueous medium is less than 6. Acidic ingredients that reduce pH of resulting aqueous medium to less than 6 are well known to a person skilled in the art and any suitable acidic ingredient may be chosen.
The aqueous medium may comprise either polymer A, or polymer B, or both the polymers. Alternatively, one or both the polymers may be added to the aqueous medium during the process of the present invention.
Polymer A, when mixed with the aqueous medium, is from 0.005 to 10%, more preferably from 0.05 to 5%, and most preferably from 0.05 to 2% by weight of the aqueous medium.
Polymer B, when mixed with the aqueous medium, is from 0.005 to 10%, more preferably from 0.01 to 5%, and most preferably from 0.01 to 2% by weight of the aqueous medium.
The aqueous medium preferably comprises an electrolyte. The electrolyte is preferably from 0.001 to 5%, more preferably from 0.01 to 1%, and most preferably from 0.04 to 0.2% by weight of the aqueous medium.
Without wishing to be limited by theory, it is believed that the addition of electrolyte allows the process of the invention to be carried out with relatively low amounts of polymers A and B.
Electrolytes that can be used according to the present invention include water soluble ionic salts. The cation of the salt includes an alkali metal, alkaline earth metal or trivalent metal cation. The anion of the salt includes chloride, sulphate, nitrate and phosphate. Some examples of electrolytes include chlorides, sulphates or nitrates of sodium, potassium, magnesium or calcium. Calcium salts are particularly preferred.
According to a preferred aspect, the aqueous medium comprises no more than 200 ppm anionic surfactant. The aqueous medium comprises no more than 100 ppm, more preferably less than 50 ppm anionic surfactant. It is particularly preferred that the aqueous medium is substantially free of anionic surfactant.
The aqueous medium preferably comprises of at least one benefit agent. The benefit agent that can be included in the aqueous medium includes, but not limited to ingredients such as perfume, fluorescer, deodorant, antibacterial agent, shading dye and bluing agent. One of the advantages of the present invention is that the deposition of benefit agent is enhanced.
Process sequence It is envisaged that the fabric is contacted with the polymers A and B either sequentially in any order, or simultaneously. Accordingly the fabric may be contacted with polymer A, followed by contacting with polymer B. Alternatively the fabric may be contacted with polymer B, followed by contacting with polymer A. The fabric may be simultaneously contacted with both the polymers A and B. Although the fabric may be contacted simultaneously with both the polymers, it is preferred that the fabric is contacted with the polymers sequentially, in any order. Process of contacting
The step of contacting the fabric with polymers A and B can be carried out in any suitable manner.
Polymers A, or polymer B, or both, are mixed with the aqueous medium prior to contacting with the fabric. Alternatively, polymer A may also be mixed with a nonaqueous medium including solvents such as alcohol and acetone prior to contacting with the fabric. However, it is preferred that the polymer or polymers are mixed with the aqueous medium prior to contacting with the fabric. The fabric may be dipped into the aqueous medium comprising one or more polymers. Alternatively, the aqueous medium comprising one or both the polymers may be sprayed on the fabric.
It is also envisaged that either of the polymers A and B may be used in a form of abradable sticks which may be rubbed against the area of the fabric to be treated, followed by contact with the aqueous medium.
Composition
According to a second aspect of the invention, there is provided a composition for treatment of a fabric comprising 1-99% by weight polymer A, 1-99% by weight polymer B, and 0 to 10% by weight an acidic ingredient wherein;
(a) polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
(b) polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the pH of 1% aqueous solution of the composition is less than 6.
The composition comprises preferably 5-95%, more preferably 10-90% and most preferably 20-80% by weight polymer A. The composition comprises preferably 5-95%, more preferably 10- 90% and most preferably 20-80% by weight polymer B.
The polymers may be chosen in such a way that pH of 1% aqueous solution of the composition is less than 6. Preferably, an acidic ingredient is present in the composition at 0.1-10% by weight of the composition to ensure that the pH of 1% aqueous solution of the composition is less than 6. Acidic ingredients that reduce pH of resulting aqueous medium to less than 6 are well known to a person skilled in the art and any suitable acidic ingredient may be chosen.
Kit
According to a third aspect of the present invention, there is provided a kit for treatment of a fabric comprising the composition of the second aspect and a set of instructions for use.
It is particularly preferred that the polymers A and B are separately packaged, i.e. the polymers A and B are packaged individually in separate packs or in separate compartments of a twin compartment package.
Examples The invention will now be demonstrated with examples. The examples are by way of illustration only and do not limit the scope of the invention in any manner.
Materials and methods
Following materials were used in the examples Table 2: Materials used in the examples
Deposition
Polymer A was polyacrylic acid of molecular mass 450000 in examples 1 and 2 and comparative examples 1-A to 2-B. Polymer B was polyvinyl pyrrolidone of molecular mass 5 90000, in example 1 and comparative examples A and B. Polymer B in example 2 and comparative examples C, D, and 2A was polyethylene oxide molecular mass 100,000.
For deposition studies about 10 g of fabric was treated0 with the polymers in solution and the weight gain was determined gravimetrically after drying of treated fabrics
Table 3: Deposition of polymers on cotton, polycotton and polyester fabrics
5
From the results, it can be seen that the deposition of two polymers when used together according to the process of the present invention is significantly higher in comparison to the fabrics treated with only one of the polymers. Soi l ing
Soiling Protocol
Fabric was treated with polymer and dried. Dried fabric was dipped in carbon soot dispersion (150 ppm) in water which was stabilized by addition of sodium alkylbenzene sulfonate (50 ppm) . The fabric was removed from the carbon soot solution and immediately rinsed in water and dried. Change in reflectance (Ī”R) , i.e. the difference in reflectance of the fabric before and after soiling, was a measure of soiling of fabric, with negative value of Ī”R indicating that the fabric was soiled.
In the following table, following abbreviations are used PEG 17500 - polyethylene glycol, molecular mass 17,500. PAA 8000 - polyacrylic acid, molecular mass 8,000.
PVA 124000 - polyvinyl alcohol, molecular mass 125,000. PVP 90000 - polyvinyl pyrrolidone molecular mass 90,000.
From the results, it can be seen that the soiling of fabrics treated by the process of the present invention is significantly less than untreated fabric (comparative example I) or for the fabrics treated with only one of the polymers (comparative examples F, G and H) . Cleaning Cleaning Protocol
Fabric was treated with polymer and dried. Dried fabric was dipped in carbon soot dispersion (150 ppm) in water which is stabilized by addition of sodium alkylbenzene sulfonate (50 ppm) . The fabric was then dried. The dried fabric was then cleaned with water, sodium carbonate (0.15% by weight) solution in water, and commercially available detergent (SURF EXCELĀ® 0.3% by weight) in water. Change in reflectance (Ī”R) was a measure of cleaning of fabric. Higher values of Ī”R indicate better cleaning.
Polymer A was polyacrylic acid of molecular mass 2000 and polymer B was polyvinyl pyrrolidone of molecular mass
90000. In Example 6, both the polymers were used at 0.2 % by weight of the aqueous medium. The pH of aqueous medium was 3.0. In comparative examples J and K, polymers A and B were used alone, respectively, each at 0.4% by weight of the aqueous medium(pH 2.7 and 7.0, respectively) .
Comparative example L is for untreated fabrics (pH 7) . The fabrics (cotton, polycotton and polyester) were cleaned according to the protocol given and the results are tabulated below
Table 5: Cleaning of fabrics soiled with carbon soot
C* - Cotton PC** - Polycotton PE*** - Polyester
From the results, it is clear that the cleaning efficacy for example 6, which is within scope of the present invention, is higher than the cleaning efficacy obtained in the comparative examples J, K and L which are outside the scope of the present invention. In particular, the cleaning efficacy is better in case of washing with sodium carbonate or water. Further, the results show that cleaning efficacy is particularly enhanced for polycotton and polyester fabrics, when washing is with commercially available surfactant .
Effect of electrolyte
Polymer A was polyacrylic acid of molecular mass 450,000 and polymer B was polyvinyl pyrrolidone of molecular mass 1,300,000. In all the examples, both the polymers were used at 0.1 % by weight of the aqueous medium. The effect of electrolyte addition was studied by adding various electrolytes at 0.1% by weight of the total aqueous medium. The pH of aqueous media was in the range 2.7 to 3.0. The fabrics (cotton, polycotton and polyester) were cleaned using sodium carbonate (0.15% by weight) solution in water. The results are tabulated below in terms of cleaning efficacy.
Table 6: Effect of addition of electrolyte
From the results, it is clear that the addition of an electrolyte leads to further enhancement of cleaning efficacy, in particular for polycotton and polyester fabrics. Further, for cotton fabrics, calcium chloride in particular gives enhancement in cleaning efficacy.
Perfume deposition Protocol Allyl amyl glycollate was taken as a representative perfumery ingredient. Polymer A was polyacrylic acid having molecular mass of 450,000 and polymer B was polyvinyl pyrrolidone having molecular mass of 90000. The perfume was added together with both the polymers A and B each at 0.1% by weight of the aqueous medium (Example 11 - pH 2.8), polymer A and polymer B alone each at 0.2% by weight of the aqueous medium (comparative example M - pH 3 and N - pH 7, respectively), whilst comparative example O (pH 7) was for untreated fabric. The perfume retention was evaluated for various types of fabrics. The fabrics were tested for perfume retention by a trained perfumer on the scale of 0 to 5 with score of 0 indicating no perfume impact and score of 5 indicating maximum perfume impact. The details are tabulated below.
Table 7: Deposition of perfume on fabrics
From the results tabulated above, it is clear that the perfume impact at 60 minutes is significantly higher for the fabric treated according to the process of the present invention .
Fluorescer deposition
Following experiments were carried out using 2 ppm CBSXĀ® (CIBA) as fluorescer. Details of polymers A and B are tabulated below along with the results in terms of whiteness score as measured by reflectance value on cotton Table 8: Deposition of fluorescer on fabrics
From the results, it is clear that the fluorescer deposition as indicated by whiteness score is enhanced when the fabric is treated with both the polymers A and B according to the process of the present invention (Example 12) as compared with untreated fabric (Comparative example R) or fabric treated with only one of the polymers (Comparative Examples P and Q) .
It will be appreciated that the above examples clearly and sufficiently describe the manner in which the process of the present invention can be practiced. It will be further appreciated that the process of the present invention is capable of meeting the object of providing a process for treatment of fabric that reduces soiling of fabrics, improves efficacy of subsequent cleaning, allows enhanced deposition of benefit agents and is effective on various types of fabrics including cotton, polycotton and polyester.

Claims

1. A process for treatment of a fabric comprising the steps of contacting the fabric with polymers A and B in an aqueous medium, wherein;
(a) polymer A is selected from the class of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
(b) polymer B is selected from the class of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the aqueous medium has pH less than 6.
2. A process as claimed in claim 1 wherein the aqueous medium comprises no more than 200 ppm anionic surfactant .
3. A process as claimed in any one of the preceding claims wherein said polymer A is selected from homopolymer or copolymer of vinyl alcohol or carboxylic acid.
4. A process as claimed in any one of the preceding claims wherein said polymer B is selected from homopolymer or copolymer of vinyl pyrrolidone or alkylene oxide.
5. A process as claimed in any one of the preceding claims wherein said homopolymer or copolymer of carboxylic acid is polyacrylic acid or a copolymer thereof.
6. A process as claimed in any one of the preceding claims wherein said aqueous medium comprises an electrolyte.
7. A process as claimed in claim 6 wherein said electrolyte is from 0.001 to 5% by weight of said medium.
8. A process as claimed in any one of the preceding claims wherein pH of said aqueous medium is from 1 to 10.
9. A process as claimed in any one the preceding claims wherein the fabric is contacted with the polymers A and B either sequentially in any order, or simultaneously.
10. A composition for treatment of a fabric comprising 1- 99% by weight polymer A, 1-99% by weight polymer B and 0 to 10% by weight an acidic ingredient wherein;
(a) polymer A is selected from the class consisting of homopolymers or copolymers of vinyl alcohol, alkylene glycol, saccharides, and carboxylic acid, and;
(b) polymer B is selected from the class consisting of homopolymers or copolymers of vinyl pyrrolidone, alkylene oxide, saccharides and carboxylic acid, and; where polymers A and B are not of the same class and the pH of 1% aqueous solution of the composition is less than 6.
11. A kit for treatment of a fabric comprising the composition of claim 10 and instructions for use.
EP08861303A 2007-12-14 2008-10-31 Process for treatment of a fabric Not-in-force EP2220288B1 (en)

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CA2707805A1 (en) 2009-06-25
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RU2473724C2 (en) 2013-01-27
JP5080652B2 (en) 2012-11-21
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MY153922A (en) 2015-04-15
AU2008337741B2 (en) 2011-11-24
EP2220288B1 (en) 2012-02-08
CA2707805C (en) 2016-10-11
US20100297359A1 (en) 2010-11-25

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