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
  • C11D3/16—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
  • C11D3/226—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin esterified
• • 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
  • C11D3/20—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
  • C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
• • 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
  • C11D3/227—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin with nitrogen-containing groups

Definitions

• the present invention relates to a composition comprising an anionic polysaccharide, for caring for articles made of textile fibers (“textile care”), especially cotton-based textiles, which are in particular colored.
• textile care especially cotton-based textiles, which are in particular colored.
• the machine washing of fabrics leads to a physical and chemical degradation of the fibers and most particularly of cotton fibers.
• the alkalinity delivered by detergents and also by certain specific compounds such as oxidizing substances (perborate or percarbonate) or certain enzymes may be the cause of the chemical degradation of cotton fibers.
• oxidizing substances perborate or percarbonate
• certain enzymes may be the cause of the chemical degradation of cotton fibers.
• the mechanical action is produced during the washing, rinsing, spin-drying or tumble-drying, when the latter takes place in a tumble dryer. This degradation of the fibers leads to the formation of fibrils at the surface of the textile which end up causing colored textiles to lose their radiance.
• This degradation also induces a decrease in the strength of the textile which, at the extreme, may lead to tearing of the fabrics.
• This degradation of the textiles may be evaluated quantitatively either by a loss of the colors of colored textiles or by a reduction in the tear strength of the textile. It is generally necessary to carry out 10 to 20 cumulative machine washes in order to perceive this type of degradation.
• Silicone-based compounds have also been used, and in particular aminosilicones (US-A-4 585 563; WO 92/07927; WO 98/39401).
• compositions for treating articles made of textile fibers, especially cotton-based articles, which are in particular colored, of certain anionic polysaccharides of high molecular mass that are soluble under the working conditions in aqueous or wet medium of said compositions makes it possible to prevent the degradation of these articles, makes it possible to protect the colors and/or gives these articles crease-resistance and/or softening properties.
• compositions may especially be compositions for washing and/or rinsing and/or softening fabrics, for destaining fabrics before washing (“prespotting”), for tumble-drying wet fabrics in a tumble dryer or for ironing fabrics.
• a first subject of the invention consists of a composition for caring for articles made of textile fibers (“fabric care”), characterized in that it comprises at least one anionic polysaccharide with a weight-average molar mass of greater than 250 000 and preferably greater than 500 000, the native skeleton of which is a polysaccharide formed from
• branches comprising at least one neutral or anionic anhydropentose and/or anhydrohexose unit the anhydrohexose and/or anhydropentose units of said anionic polysaccharide being substituted or modified with at least one anionic group or a group that may be anionized at the working pH of said composition, the degree of substitution or of modification DSi of the anhydrohexose and/or anhydropentose units with said anionic or anionizable group(s) ranging from 0.1 to less than 3 and preferably from 0.2 to 2.5.
• the weight-average molar mass of said anionic polysaccharides may be up to 2 000 000.
• the weight-average molar mass Mw of said anionic polysaccharides may be measured by size exclusion chromatography. The measurement is performed in water at pH 9-10 containing 0.1 M LiCl and 2/10000 of NaN 3 .
• the weight-average molar mass Mw is established directly in a manner that is known via the light-scattering values.
• the degree of substitution or of modification DSi corresponds to the average number of hydroxyl functions in the anhydrohexose and/or anhydropentose units that are substituted or modified with said anionic or anionizable group(s), per anhydrohexose and/or anhydropentose unit.
• Said ionic or ionizable groups are linked to the carbon atoms of the sugar skeleton either directly or via —O— bonds.
• said anionic polysaccharide may also contain at least one nonionic group.
• Said nonionic groups are linked to the carbon atoms of the sugar skeleton either directly or via —O— bonds.
• the degree of substitution or of modification by all the anionic or anionizable and nonionic groups is less than 3, by definition.
• the number of moles of substitution MS is theoretically not limited; it may be, for example, up to 6 and preferably up to 2.
• anionic or anionizable groups that may be mentioned are those containing one or more carboxylate, sulfonate, sulfate, phosphate, phosphonate, etc. functions.
• R is a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms
• x is an integer ranging from 0 to 5
• y is an integer ranging from 0 to 5
• M represents an alkali metal
• nonionic groups that may be mentioned are those of formula:
• R is a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms
• x is an integer ranging from 0 to 5
• R 1 represents:
• R 2 representing an alkyl, aryl or arylalkyl radical containing from 1 to 22 carbon atoms
• y is an integer ranging from 0 to 5
• R 1 having the definition given above, linked to a carbon atom of the sugar skeleton via an —O— bond.
• the hexose units (identical or different) of the main chain of the native skeleton may be D-glucose, D- or L-galactose, D-mannose, D- or L-fucose, L-rhamnose, etc. units.
• the neutral or anionic pentose and/or hexose units (identical or different) of the branches of the native skeleton may be D-xylose, L- or D-arabinose, D-glucose, D- or L-galactose, D-mannose, D- or L-fucose, L-rhamnose, etc., D-glucuronic acid, D-galacturonic acid, D-mannuronic acid, etc. units.
• Examples of native skeletons that may be mentioned include galactomannans, galactoglucomannans, xyloglucans, xanthan gums, scleroglucans, succinoglycans, rhamsans, welan gums, etc.
• the native skeleton is preferably a galactomannan.
• Galactomannans are macromolecules comprising a main chain of D-mannopyranose units linked in position ⁇ (1-4) substituted with D-galactopyranose units in position ⁇ (1-6).
• the native skeleton is most preferably a guar gum. Guar gums have a mannose/galactose ratio of 2.
• the anionic polysaccharides according to the invention may be obtained in a known manner.
• anionic polysaccharides according to the invention examples include:
• carboxymethysl galactomannans in particular carboxymethyl guars
• carboxymethyl hydroxypropyl galactomannans in particular carboxymethyl hydroxypropyl guars.
• a second subject of the invention consists of a process for caring for articles made of textile fibers, by treating these articles with a composition, in aqueous or wet medium, comprising at least one anionic polysaccharide according to the invention.
• a third subject of the invention consists in using, in a composition for treating articles made of textile fibers in an aqueous or wet medium, of at least one anionic polysaccharide according to the invention, as an agent for caring for textile fibers.
• composition and the working (or treatment) conditions may be in numerous forms.
• Said composition may be any composition.
• composition of the invention may be:
• a liquid rinsing and/or softening formulation capable of directly forming a rinsing and/or softening bath by dilution
• a solid material in particular a textile, comprising said anionic polysaccharide, which is intended to be placed in contact with wet fabrics in a tumble dryer (said solid material is referred to hereinbelow as a “tumble dryer additive”);
• a washing additive intended to be placed on the dry fabrics prior to a washing operation using a detergent formulation containing or not containing said anionic polysaccharide (said additive is referred to hereinbelow as a “prespotter”).
• composition of the invention is particularly suitable for fabric care, especially for cotton-based fabrics, in particular fabrics containing at least 35% cotton. It is most particularly suitable for caring for colored fabrics.
• anionic polysaccharides according to the invention are soluble under the working conditions in aqueous or wet medium of said composition.
• Said anionic polysaccharides are considered as soluble when more than 50% and preferably more than 70% of their weight are soluble in the working aqueous or wet medium of the composition of the invention, i.e. especially under the temperature and pH conditions of said medium.
• the working pH of the composition of the invention may range from about 2 to about 12, depending on the desired use.
• a detergent formulation the pH of the washing bath is generally from about 7 to 11 and preferably from 8 to 10.5;
• a rinsing and/or softening formulation the pH of the rinsing and/or softening bath is generally from about 2 to 8;
• a drying additive the pH to be considered is that of the residual water, which may be from about 2 to 9;
• an aqueous ironing formulation the pH of said formulation is generally from about 5 to 9;
• the pH to be considered is that of the washing bath for the operation following washing, i.e. from about 7 to 11 and preferably from 8 to 10.5.
• the amount of anionic polysaccharide present in the care composition according to the invention may range from 0.05% to 10% as dry weight relative to the dry weight of said composition, depending on the desired application.
• said anionic polysaccharide (AP) may be used as follows: % of (AP) in a care composition (as dry weight) according to the invention used as 0.05-5 detergent formulation preferably 0.1-3 0.05-3 rinsing and/or softening preferably 0.1-2 formulation 0.05-10 tumble dryer additive 0.05-10 ironing formulation preferably 0.1-5 0.05-10 prespotter preferably 0.1-5
• compositions may contain at least one surfactant and/or one detergent additive and/or -rinsing additive and/or softening additive for articles made of textile fibers and/or one solid support (especially a textile support) for said anionic polysaccharide.
• At least one natural and/or synthetic surfactant at least one natural and/or synthetic surfactant
• At least one detergent adjuvant (“builder”) at least one detergent adjuvant (“builder”).
• the detergent formulation may comprise surfactants in an amount corresponding to about 3% to 40% by weight relative to the detergent formulation, these surfactants being such as
• alkyl ester sulfonates of formula R—CH(SO 3 M)—COOR′ in which R represents a C 8 -C 20 and preferably C 10 -C 16 alkyl radical, R′ represents a C 1 -C 6 and preferably C 1 -C 3 alkyl radical and M represents an alkali metal (sodium, potassium or lithium) cation, a substituted or unsubstituted ammonium (methyl-, dimethyl-, trimethyl- or tetramethylammonium, dimethylpiperidinium, etc.) or an alkanolamine derivative (monoethanolamine, diethanolamine, triethanolamine, etc.). Mention may be made most particularly of methyl ester sulfonates in which the radical R is C 14 -C 16 ;
• alkyl sulfates of formula ROSO 3 M in which R represents a C 5 -C 24 and preferably C 10 -C 18 alkyl or hydroxyalkyl radical, M representing a hydrogen atom or a cation of the same definition as above, and also the ethoxylenated (EO) and/or propoxylenated (PO) derivatives thereof, containing on average from 0.5 to 30 and preferably from 0.5 to 10 EO and/or PO units;
• amine oxides such as C 10 -C 18 alkyl dimethylamine oxides and C 8 -C 22 alkoxy ethyl dihydroxyethylamine oxides;
• alkyldimethylbetaines alkylamidopropyldimethylbetaines, alkyltrimethylsulfobetaines and the products of condensation of fatty acids and of protein hydrolysates;
• alkyl amphoacetates or alkyl amphodiacetates in which the alkyl group contains from 6 to 20 carbon atoms.
• the detergent adjuvants (“builders”) for improving the surfactant properties may be used in amounts corresponding to about 5-50% and preferably to about 5-30% by weight for the liquid detergent formulations or to about 10-80% and preferably 15-50% by weight for the powder detergent formulations, these detergent adjuvants being such as:
• polyphosphates tripolyphosphates, pyrophosphates, orthophosphates or hexametaphosphates of alkali metals, of ammonium or of alkanolamines
• silicates in particular those with an SiO 2 /Na 2 O ratio from about 1.6/1 to 3.2/1 and the lamellar silicates described in US-A-4 664 839;
• alkali metal or alkaline-earth metal carbonates (bicarbonates, sesquicarbonates);
• [0118] cogranulates of alkali metal silicate hydrates and of alkali metal (sodium or potassium) carbonates that are rich in silicon atoms in Q2 or Q3 form, described in EP-A-488 868;
• water-soluble polyphosphonates ethane 1-hydroxy-1,1-diphosphonates, methylenediphosphonate salts, etc.
• water-soluble salts of carboxylic polymers or copolymers or water-soluble salts thereof such as:
• polycarboxylate ethers (oxydisuccinic acid and its salts, monosuccinic acid tartrate and its salts, disuccinic acid tartrate and its salts);
• citric acid and its salts citric acid and its salts, mellitic acid and succinic acid and their salts;
• polyacetic acid salts ethylenediaminetetraacetates, nitrilotriacetates, N-(2-hydroxyethyl)nitrilodiacetates
• the detergent formulation may also comprise at least one oxygen-releasing bleaching agent comprising a percompound, preferably a persalt.
• Said bleaching agent may be present in an amount corresponding to about 1% to 30% and preferably from 4% to 20% by weight relative to the detergent formulation.
• perborates such as sodium perborate monohydrate or tetrahydrate
• peroxygenated compounds such as sodium carbonate peroxyhydrate, pyrophosphate peroxyhydrate, urea peroxyhydrate, sodium peroxide and sodium persulfate.
• the preferred bleaching agents are sodium perborate monohydrate or tetrahydrate and/or sodium carbonate peroxyhydrate.
• Said agents are generally combined with a bleaching activator which generates, in situ in the washing medium, a peroxycarboxylic acid in an amount corresponding to about 0.1% to 12% and preferably from 0.5% to 8% by weight relative to the detergent formulation.
• a bleaching activator which generates, in situ in the washing medium, a peroxycarboxylic acid in an amount corresponding to about 0.1% to 12% and preferably from 0.5% to 8% by weight relative to the detergent formulation.
• these activators mention may be made of tetraacetylethylenediamine, tetraacetyl-methylenediamine, tetraacetylglycoluryl, sodium p-acetoxybenzenesulfonate, pentaacetylglucose and octaacetyllactose.
• non-oxygenated bleaching agents which act by photoactivation in the presence of oxygen, these being agents such as sulfonated aluminum and/or zinc phthalocyanins.
• the detergent formulation may also comprise soil-release agents, anti-redeposition agents, chelating agents, dispersants, fluorescers, foam suppressants, softeners, enzymes and various other additives.
• cellulose derivatives such as cellulose hydroxy ethers, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose or hydroxybutylmethylcellulose;
• polyvinyl esters grafted onto polyalkylene trunks such as polyvinyl acetates grafted onto polyoxyethylene trunks (EP-A-219 048);
• polyester copolymers based on ethylene terephthalate and/or propylene terephthalate and polyoxyethylene terephthalate units with an ethylene terephthalate and/or propylene terephthalate (number of units)/polyoxyethylene terephthalate (number of units) molar ratio from about 1/10 to 10/1 and preferably from about 1/1 to 9/1, the polyoxyethylene terephthalates containing polyoxyethylene units with a molecular weight from about 300 to 5 000 and preferably from about 600 to 5 000 (US-A-3 959 230, US-A-3 893 929, US-A-4 116 896, US-A-4 702 857, US-A-4 770 666);
• sulfonated polyester oligomers obtained by sulfonation of an oligomer derived from ethoxylated allylic alcohol, from dimethyl terephthalate and from 1,2-propylene diol, containing from 1 to 4 sulfonated groups (US-A-4 968 451);
• polyester copolymers based on propylene terephthalate and polyoxyethylene terephthalate units and ending with ethyl or methyl units (US-A-4 711 730) or polyester oligomers ending with alkylpolyethoxy groups (US-A-4 702 857) or sulfopolyethoxy (US-A-4 721 580) or sulfoaroyl (US-A-4 877 896) anionic groups;
• sulfonated polyester copolymers derived from terephthalic, isophthalic and sulfoisophthalic acid, anhydride or diester and from a diol (FR-A-2 720 399).
• sulfonated polyester oligomers obtained by condensation of isophthalic acid, dimethyl sulfo-succinate and diethylene glycol (FR-A-2 236 926);
• Agents for chelating iron and magnesium may be present in amounts of about 0.1-10% and preferably of about 0.1-3% by weight.
• aminocarboxylates such as ethylenediaminetetra-acetates, hydroxyethylethylenediaminetriacetates and nitrilotriacetates;
• aminophosphonates such as nitrilotris(methylene-phosphonates);
• polyfunctional aromatic compounds such as dihydroxy-disulfobenzenes.
• These may be present in an amount of about 0.1-7% by weight, to control the calcium and magnesium hardness, these being agents such as:
• water-soluble polycarboxylic acid salts with a molecular mass from about 2 000 to 100 000, obtained by polymerization or copolymerization of ethylenically unsaturated carboxylic acids such as acrylic acid, maleic acid or anhydride, fumaric acid, itaconic acid, aconitic acid, mesaconic acid, citraconic acid or methylenemalonic acid, and most particularly polyacrylates with a molecular mass from about 2 000 to 10 000 (US-A-3 308 067), copolymers of acrylic acid and of maleic anhydride with a molecular mass from about 5 000 to 75 000 (EP-A-66 915);
• polyethylene glycols with a molecular mass from about 1 000 to 50 000.
• agents such as:
• agents such as:
• C 10 -C 24 monocarboxylic fatty acids or alkali metal, ammonium or alkanolamine salts thereof, and fatty acid triglycerides;
• saturated or unsaturated aliphatic, alicyclic, aromatic or heterocyclic hydrocarbons such as paraffins and waxes
• polyorganosiloxane oils or resins optionally combined with silica particles.
• These may be present in amounts of about 0.5-10% by weight, these being agents such as clays.
• proteases amylases, lipases, cellulases and peroxidases (US-A-3 553 139, US-A-4 101 457, US-A-4 507 219, US-A-4 261 868).
• the detergent formulation may be used, in particular in a washing machine, in a proportion of from 0.5 g/l to 20 g/l and preferably from 2 g/l to 10 g/l to carry out washing operations at a temperature from about 25 to 90° C.
• a second embodiment of the care composition of the invention consists of an aqueous liquid formulation for rinsing and/or softening fabrics.
• It may be used in a proportion of from 0.2 to 10 g/l and preferably from 2 to 10 g/l.
• cationic surfactants triethanolamine diester quaternized with dimethyl sulfate, N-methyl-imidazoline tallow ester methyl sulfate, dialkyl-dimethylammonium chloride, alkylbenzyldimethylammonium chloride, methyl alkylimidazolinium sulfate, methyl methylbis(alkylamidoethyl)-2-hydroxyethylammonium sulfate, etc.) in an amount which may range from 3% to 50% and preferably from 4% to 30% of said formulation, optionally combined with nonionic surfactants (ethoxylated fatty alcohols, ethoxylated alkylphenols, etc.) in an amount which may be up to 3%;
• nonionic surfactants ethoxylated fatty alcohols, ethoxylated alkylphenols, etc.
• optical brighteners (0.1% to 0.2%);
• color-fast agents polyvinylpyrrolidone, polyvinyloxazolidone, polymethacrylamide, etc. 0.03% to 25% and preferably 0.1% to 15%
• solvents in particular alcohols (methanol, ethanol, propanol, isopropanol, ethylene glycol or glycerol),
• a third embodiment of the care composition of the invention consists of an additive for drying fabrics in a suitable tumble dryer.
• Said additive comprises a flexible solid support consisting, for example, of a strip of woven or nonwoven textile or a sheet of cellulose, impregnated with said anionic polysaccharide; said additive is introduced at the time of tumble-drying into the wet fabrics to be dried at a temperature from about 50 to 80° C. for 10 to 60 minutes.
• Said additive may also comprise cationic softeners (up to 99%) and color-fast agents (up to 80%), such as those mentioned above.
• a fourth embodiment of the care composition of the invention consists of an ironing formulation which may be sprayed directly onto the dry fabrics before ironing.
• Said formulation may also contain silicone-based polymers (from 0.2% to 5%), nonionic surfactants (from 0.5% to 5%) or anionic surfactants (from 0.5% to 5%), fragrances (0.1% to 3%) or cellulose derivatives (0.1% to 3%), for instance starch; spraying said formulation onto the fabrics makes it easier to iron them and limits the creasing of the fabrics when they are worn.
• a fifth embodiment of the care composition of the invention consists of a prespotter which is in the form of an aqueous solution or dispersion or a solid (stick).
• anionic surfactants such as those already mentioned above, in an amount of at least 5% of the weight of the composition
• nonionic surfactants such as those already mentioned above, in an amount which may range from 15% to 40% of the weight of the composition
• aliphatic hydrocarbons in an amount which can range from 5% to 20% of the weight of the composition.
• the anionic polysaccharide used in the examples below is a carboxymethyl guar with a degree of substitution of 1.6 and a weight-average molar mass of 1 400 000, determined as follows by size exclusion chromatography.
• injector-pump JASCO pump
• detector RI Waters 410 refractometer Sensitivity 8, MALLS Wyatt light scattering, 633 nm He laser
• the injected solution (200 ⁇ l) contains about 0.5% by weight of anionic polysaccharide.
• the weight-average molecular mass is established directly without calibration using the light scattering values extrapolated to zero angle; these values are proportional to CxMx(dn/dc) 2 .
• M corresponds to the weight-average molecular mass
• n corresponds to the optical index of the solution
• Detergent Formulation Formulation (B) (A) color (C) with P without P without P Constituents % by weight % by weight % by weight NaTPP 40 Zeolite 4A 0 25 25 2 SiO 2 , Na 2 O silicate 5 5 5 Sodium carbonate 5 15 15 15 Acrylate/maleate copolymer 0 5 5 Sokalan CP5 (BASF) Sodium sulfate 8 21 8 CMC blanose 7MXF 1 1 1 (Hercules) Perborate monohydrate 15 0 15 Granulated TAED 5 0 5 Anionic surfactant 6 8 6 Laurylbenzene sulfate (Nansa) Nonionic surfactant 3 5 3 Symperonic A3 (3 EO ethoxylated alcohol - ICI) Nonionic surfactant 9 11 9 Symperonic A9 (9 EO ethoxylated alcohol - ICI) Enzymes (esterases, 0.5 0.5 0.5 amylases, cellulase
• a washing operation is carried out in a Tergotometer laboratory machine which is well known in the profession to detergent composition formulators.
• the machine simulates the mechanical and thermal effects of pulsating-type American washing machines, but, by virtue of the presence of 6 washing drums, it makes it possible to carry out simultaneous series of tests with an appreciable saving in time.
• the cotton test pieces are first ironed so that they all have the same level of creasing before washing.
• volume of water 1 litre
• washing product concentration 5 g/l
• washing temperature 40° C.
• test pieces are then creased under a 3 kg press for 20 seconds, after which they are dried vertically overnight.
• a digital color photograph is then taken of the dry test pieces, which is then converted into 256 gray scale levels (gray scale from 0 to 255).
• ⁇ 1 corresponds to the standard deviation obtained with the detergent formulation containing no anionic polysaccharide.
• ⁇ 2 corresponds to the standard deviation obtained with the detergent formulation containing the anionic polysaccharide.
• Rinsing/Softening Formulation Constituents % by weight
• AEG Lavamat 2050 Turbo automatic washing machine Commercial front-loading washing machine—wash cycles at 40° C.—volume of washing water: 13 liters Recorded program: 10 wash cycles
• Washing conditions Wash temperature: 40° C. Duration: about 67 min Number of washes: 10 Laundry load: 3 kg dry weight (4 towels + 6 tea cloths + colored fabrics) Bath volume: 13 liters ⁇ 1 liter Water hardness: about 23° TH French Washing formula 5 ⁇ 0.1 g/l concentration:
• the measuring system used is the CIE [International Commission on Illumination]—L* a* b* (DIN6174, CIE-LAB 1976).
• L* corresponds to the degree of whiteness on a white- black scale.
• a* positions the color in a range from green to red.
• b* positions the color in a range from yellow to blue.
• Each sample of fabric is measured at 5 different points (one at the center and one in each corner) and the average of the components L*, a* and b* is calculated.
• the reflectometer is equipped with software that indirectly calculates the ⁇ E* from the data previously recorded. This value corresponds to the color variation recorded on the fabric after washing and is expressed as follows:
• ⁇ E 1 ⁇ square root ⁇ square root over (( ⁇ L 1 ) 2 +( ⁇ a 1 ) 2 +( ⁇ b 1 ) 2 ) ⁇
• the performance quality of the polysaccharide relative to the reference is measured as the difference in ⁇ E* between the formulae without and with polysaccharide.
• the cumulative loss of color is calculated as the sum of the losses of color of the colored fabrics.
• a detergent formulation (F) is prepared by adding 1 part of anionic polysaccharide to 100 parts of composition (C) below (expressed in parts by weight): sodium lauryl alkyl benzene sulfonate 19.2 Nabion 15 from Rhodia (cogranules of 48.6 sodium silicate and of calcium carbonate) sodium carbonate 10.3 sodium sulfate 13.5 Sokalan CP5 6.4 Phosphonate Dequest 2016 2

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  • 2008-07-02 US US12/166,941 patent/US20080263788A1/en not_active Abandoned
• 2010
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