Patent Application
20050130862
A subject matter of the present invention is novel, water-soluble or water-dispersible, linear sulfonated copolymers (linear sulfonated copolyesteramides), their process of preparation and their use as soil release and/or antiredeposition and/or detergent agent in compositions for the treating (washing and/or rinsing, prespotting, drying in a tumble dryer or ironing) of articles made of textile fibers, in particular of polyamide fibers.
Water-soluble or water-dispersible sulfonated poly-esters are known as soil release additives in detergent compositions for washing articles made of polyester-based textile fibers (EP-A-763 068, U.S. Pat. No. 4,877,896, U.S. Pat. No. 5,599,792, WO 93/21294, U.S. Pat. No. 5,415,807, WO 95/02030).
The Applicant Company has found novel copolymers derived from water-soluble or water-dispersible sulfonated polyesters which additionally exhibit an improved effectiveness, in particular as soil release agent, for the washing of textiles made of polyamide fibers, in particular in the presence of nonionic surface-active agents or of a mixture of anionic and nonionic surface-active agents.
A first subject matter of the invention consists of novel water-soluble or water-dispersible linear sulfonated copolymers (C), characterized in that they comprise:
Said linear sulfonated copolymers (C) according to the invention are regarded as water-soluble when soluble to at least 5% by weight in water of pH 7 at 25° C. They are regarded as water-dispersible when they do not form aggregates under these same conditions.
Preferably, the polyesteramide chains (C) are composed essentially of
The groups of formula (V) above and/or of formula (VI′1)
H—(O—CH2—CH2—)n— (VI′1)
and/or a hydrogen atom H are present as preferred chain (C1) ends.
The optional polyester chains (C2) have the general formula (III′)
[—C(O)-Q-C(O)—(O—CH2—CH2—)n—O]x (III′)
The groups of formula (VI′2)
H—(O—CH2—CH2—)n—O (VI′2)
and/or a hydrogen atom H are present as preferred optional chain (C2) ends.
More preferably still, the molar percentage of the residues of formula (O—CH2—CH2—)n where n is equal to 1, with respect to the combined residues of formula (O—CH2—CH2—)n where n is equal to 1, 2, 3 and 4, in the units or end(s) of formulae (I′), (II′), (VI′1), (III′) and (VI′2) is from 10 to 80, preferably from 20 to 60.
The weight-average molecular masses are measured by gel permeation chromatography, in dichloromethane comprising 2/1000 by volume of trifluoroacetic anhydride and 5×10−3M of BF4N (Bu)4, at ambient temperature. The results are expressed in polystyrene equivalents.
The nonionic residues (NQ) of the units of formulae (I), (II) and (III) can be alike or different.
Mention may be made, as examples of nonionic residues (NQ), of nonionic C6-C14 mono- or polyarylene residues and nonionic, linear or branched, C1-C9 alkylene residues, such as the 1,4-phenylene, 1,3-phenylene, 1,6-naphthalene, 1,6-cyclohexylene, ethylene, trimethylene, tetramethylene or hexamethylene residues.
The sulfonated residues (SQ) of the units of formulae (I), (II) and (III) can be alike or different.
Mention may be made, as examples of sulfonated residues (SQ), of sulfonated C6-C14 mono- or polyarylene residues and sulfonated, linear or branched, C1-C9 alkylene residues carrying at least one sulfonic acid functional group, preferably in the form of an alkali metal or tetraalkylammonium sulfonate, very particularly a sodium sulfonate, such as the sodiooxysulfonylphenylene, sodiooxysulfonylnaphthalene, sodiooxysulfonylbiphenylene or sodiooxysulfoethylene residues.
Preferably, the nonionic residue (NQ) is a 1,4-phenylene residue (NQ1) or a 1,3-phenylene residue (NQ2) and the sulfonated residue (SQ) is a 5-sodiooxysulfonyl-1,3-phenylene residue.
Very preferably, the nonionic residues (NQ) of the units of formulae (I), (II) and (III) are 1,4-phenylene residues (NQ1) or a mixture of 1,4-phenylene residues (NQ1) and of 1,3-phenylene residues (NQ2), the molar percentage of the units of formula —C(O)-Q-C(O)— where Q is a residue (NQ1), with respect to the combined units of formula —C(O)-Q-C(O)— where Q is a nonionic residue (NQ), being of the order of 50 to 100, preferably of 70 to 90.
Preferably, the symbol R in the formulae (I), (II), (III), (VI1) and (VI2) represents an ethylene residue —CH2—CH2—.
Preferably, the symbol W in the formulae (I), (I′), (IV) and (V) represents an ethylene, trimethylene, tetramethylene, pentamethylene, heptamethylene, decamethylene, undecamethylene or phenylene residue.
Preferably, the symbol R′ in the formulae (I), (I′), (IV) and (V) represents H.
The novel linear sulfonated copolymers (C) forming the subject matter of the invention can be obtained by:
The term “insertion/polymerization reaction” is understood to mean the insertion of a lactam corresponding to an amino acid with a structure of formula (VIII) in which q is equal to 1 inside the structure of said linear sulfonated polyester and optionally polymerization of said lactam by ring opening initiated by the chain ends of said linear sulfonated polyester.
The insertion reaction can be illustrated as follows:
The term “aminolysis/acidolysis/polycondensation reaction” is understood to mean the reaction of an amino acid with a structure of formula (VIII) in which q is equal to 1 with said sulfonated polyester and with itself.
The term “ester/amide exchange reaction” is understood to mean the reaction of an amino acid with a structure of formula (VIII) in which q is greater than 1 with said sulfonated polyester.
The reaction between said amino acid, poly(amino acid) or lactam and said linear sulfonated polyester is carried out in a molten medium at a temperature which can favorably range from 220 to 280° C., more preferably around 250° C., under a pressure of 1 to 3 bar, preferably of 1 bar.
Said reaction can be carried out in the absence or in the presence of a catalyst, in an amount which can range up to 0.2% by weight with respect to the total amount of reactants employed.
The catalysts which can be employed are in particular zinc, phosphorus, tin, antimony or sulfur derivatives, such as zinc acetate, hypophosphorous acid, ortho-phosphorous acid, tin dibutyldilaurate, antimony trioxide or p-toluenesulfonic acid; very preferably, they are zinc acetate and hypophosphorous acid.
The reaction can last from 1 hour to 10 hours when it is carried out in a conventional polymerization reactor; it can last from 10 seconds to 10 minutes when it is carried out in an extrusion device (screw, for example).
Insertion/polymerization is a particularly advantageous method for the preparation of the linear sulfonated copolymers of the invention.
Preferably, the level of water in the reaction medium is less than 5%, more preferably still less than 1%, by weight.
Mention may be made, among the amino acids, poly(amino acid)s or lactams which can be employed, of
Mention may in particular be made, among the linear sulfonated polyesters which can be employed, of those forming the subject matter of EP-A-763 068, U.S. Pat. No. 4,877,896, U.S. Pat. No. 5,599,792, WO 93/21294, U.S. Pat. No. 5,415,807 and WO 95/02030.
According to a preferred embodiment, the linear sulfonated polyester employed comprises:
More preferably still, the molar percentage of the residues of formula (O—CH2—CH2—)n where n is equal to 1, with respect to the combined residues of formula (O—CH2—CH2—)n where n is equal to 1, 2, 3 and 4, in the chains or end(s) of formulae (IX′) and (VI′2) is of the order of 10 to 80, preferably of the order of 20 to 60.
The linear sulfonated polyesters employed in preparing the novel linear sulfonated copolymers (C) of the invention are known products.
Thus, the linear sulfonated polyesters exhibiting groups of formula (VI′2) and H as chain ends can be obtained in a known way, for example by esterification and/or transesterification in the presence of an esterification/transesterification catalyst and poly-condensation in the presence of a polycondensation catalyst of a monomer composition composed essentially of:
The basic entity considered in the definition of the mole of monomer (MNQ) or (MSQ) is the COOH functional group in the case of the diacids or the COOH functional group equivalent in the case of the anhydrides or the diesters.
Mention may be made, among nonsulfonated diacid monomers (MNQ), of terephthalic, isophthalic, 2,6-naphthalenedicarboxylic, cyclohexanedicarboxylic, succinic, glutaric, adipic or suberic acids, their anhydrides or their lower diesters.
The nonsulfonated diacid monomer (MNQ) is preferably composed of 50 to 100 mol %, very particularly of 70 to 90 mol %, of terephthalic acid or anhydride or of one of its lower diesters (methyl, ethyl, propyl, isopropyl, butyl) and of 0 to 50 mol %, very particularly of 10 to 30 mol %, of isophthalic acid or anhydride or of one of its lower diesters (methyl, ethyl, propyl, isopropyl, butyl); the preferred diesters are those of methyl.
The sulfonated diacid monomer (MSQ) exhibits at least one sulfonic acid group, preferably in the form of an alkali metal or tetraalkylammonium sulfonate (preferably sodium sulfonate), and two acid functional groups or acid functional group equivalents (that is to say, one anhydride functional group or two ester functional groups) attached to one or more aromatic rings when said monomer is aromatic.
In the case of a sulfonated aliphatic diacid monomer, the sulfonic acid group can be bonded to a carbon atom of an alkylene radical, either directly or indirectly via an alkylene, alkoxyalkylene, oxyalkylene, aryl-alkylene, alkylarylalkylene or alkoxyarylene group.
Mention may be made, among sulfonated diacid monomers (MSQ), of sulfonated aromatic or aliphatic dicarboxylic acids, such as sulfoisophthalic, sulfoterephthalic, sulfoorthophthalic, 4-sulfonaphthalene-2,7-dicarboxylic, sulfodiphenyldicarboxylic or sulfosuccinic acids, their anhydrides or their lower diesters. The preferred sulfonated diacid monomers (MSQ) are sulfoisophthalic acids or anhydrides and their dimethyl esters and very particularly dimethyl 5-(sodiooxysulfonyl)isophthalate.
The preferred sulfonated polyesters can be obtained from:
They can be prepared by carrying out the following successive stages:
The operating conditions of the transesterification, esterification and condensation stages which can be carried out are those disclosed in WO 95/32997.
Chain ends of formula of the type (VI2) where the symbol Z represents a sulfobenzoyl group can be obtained by employing, preferably in the esterification stage, sulfonated monoacid monomers, such as m-sodiosulfobenzoic acid, methyl m-sodiosulfobenzoate or 2-hydroxyethyl m-sodiosulfobenzoate.
The linear sulfonated copolymers (C) forming the subject matter of the invention can be used as soil release and/or antiredeposition and/or detergent agents in compositions for the treatment of articles made of textile fibers, preferably based on synthetic polymer (polyamide and polyester, for example), said compositions being intended to be employed in an operation in which said articles are washed and/or rinsed, prespotted, dried in a tumble dryer or ironed.
Said copolymers are particularly advantageous as soil release agents for washing and/or rinsing, prespotting, drying in a tumble dryer or ironing articles made of polyamide fibers.
A second subject-matter of the invention consists of a composition for the treatment of articles made of textile fibers, intended to be employed in an operation in which said articles are washed and/or rinsed, prespotted, dried in a tumble dryer or ironed, comprising from 0.01 to 70%, preferably from 0.05 to 30%, with respect to the weight of said compositions, of at least one water-soluble or water-dispersible linear sulfonated copolymer (C) described above.
The composition and the conditions for use (or for treatment) can take many forms.
Said composition can be provided
Thus, the composition according to the invention can be:
The operating pH of the composition according to the invention can range from approximately 2 to approximately 12, according to the use desired.
When it concerns
The amount of copolymer (C) which can be employed depends on the application desired.
Thus, said copolymer (C) can be employed as follows:
Other constituents can be present, apart from the copolymer (C), in the composition according to the invention. Said composition can comprise at least one surface-active agent and/or one detergency and/or rinsing and/or ironing additive for articles made of textile fibers and/or one solid support (in particular textile support) for said copolymer (C). Preferably, said composition comprises at least one anionic surface-active agent or a mixture of anionic and nonionic surface-active agents.
The nature of these constituents depends on the use desired for said composition.
Thus, when it concerns a detergent formulation for washing the laundry, this formulation generally comprises:
The detergent formulation can comprise surface-active agents in an amount corresponding to approximately 3 to 40% by weight with respect to the detergent formulation, surface-active agents such as
Anionic Surface-Active Agents
Builders which improve the properties of the surface-active agents can be employed in amounts corresponding to approximately 5-50%, preferably to approximately 5-30%, by weight for the liquid detergent formulations or to approximately 10-80%, preferably 15-50%, by weight for the powder detergent formulations, builders such as:
Inorganic Builders
The detergent formulation can additionally comprise at least one oxygen-releasing bleaching agent comprising a percompound, preferably a persalt.
Said bleaching agent can be present in an amount corresponding to approximately 1 to 30%, preferably from 4 to 20%, by weight with respect to the detergent formulation.
Mention may appropriately be made, as examples of percompounds capable of being used as bleaching agents, in particular of perborates, such as sodium perborate monohydrate or tetrahydrate; or peroxygenated compounds, such as sodium carbonate peroxohydrate, pyrophosphate peroxohydrate, urea hydrogen peroxide, sodium peroxide or sodium persulfate.
The preferred bleaching agents are sodium perborate mono- or tetrahydrate and/or sodium carbonate peroxohydrate.
Said agents are generally used in combination with a bleaching activator generating in situ, in the detergent medium, a peroxycarboxylic acid, in an amount corresponding to approximately 0.1 to 12%, preferably from 0.5 to 8%, by weight with respect to the detergent formulation. Mention may be made, among these activators, of tetraacetylethylenediamine, tetraacetyl-methylenediamine, tetraacetylglycoluril, sodium p-acetoxybenzenesulfonate, pentaacetylglucose or octaacetyllactose.
Non-oxygenated bleaching agents, which act by photo-activation in the presence of oxygen, may also be mentioned, agents such as sulfonated zinc and/or aluminum phthalocyanines.
The detergent formulation can additionally comprise other soil release agents, other antiredeposition agents, chelating agents, dispersing agents, fluorescence agents, foam-suppressant agents, softeners, enzymes and various other additives.
Soil Release Agents
They can be employed in amounts of approximately 0.01-10%, preferably approximately 0.1-5% and more preferably of the order of 0.2-3% by weight.
Mention may more particularly be made of agents such as:
They can be employed in amounts generally of approximately 0.01-10% by weight for a powder detergent formulation and of approximately 0.01-5% by weight for a liquid detergent formulation.
Mention may in particular be made of agents such as:
Iron- and magnesium-chelating agents can be present in amounts of the order of 0.1-10%, preferably of the order of 0.1-3%, by weight.
Mention may be made, inter alia, of:
They can be present in an amount of the order of 0.1-7% by weight, in order to control the calcium and magnesium hardness, agents such as
They can be present in an amount of approximately 0.05-1.2% by weight, agents such as derivatives of stilbene, pyrazoline, coumarin, fumaric acid, cinnamic acid, azoles, methinecyanines, thiophenes, and the like (“The Production and Application of Fluorescent Brightening Agents”, M. Zahradnik, published by John Wiley & Sons, New York, 1982).
Foam-Suppressant Agents
They can be present in amounts which can range up to 5% by weight, agents such as:
They can be present in amounts of approximately 0.5-10% by weight, softeners such as clays.
Enzymes
They can be present in an amount which can range up to 5 mg by weight, preferably of the order of 0.05-3 mg, of active enzyme/g of detergent formulation, enzymes such as:
Mention may be made, inter alia, of:
The washing formulation can be employed, in particular in a washing machine, in a proportion of 0.5 g/l to 20 g/l, preferably of 2 g/l to 10 g/l, for carrying out washing operations at a temperature of the order of 25 to 90° C.
When it concerns a liquid aqueous formulation for rinsing the laundry, other constituents can be present apart from the copolymer (C), of the type
The rinsing formulation employed, in particular in a washing machine, in a proportion of 0.2 to 10 g/l, preferably of 2 to 10 g/l.
When it concerns a drying additive for the laundry in an appropriate drying machine, said additive comprises a flexible solid support composed, for example, of a strip of woven or nonwoven textile or a sheet of cellulose impregnated with said copolymer (C); said additive is introduced in drying into the wet laundry to be dried at a temperature of the order of 50 to 80° C. for 10 to 60 minutes.
Said additive can additionally comprise cationic softeners (up to 99%) and color-fast agents (up to 80%), such as those mentioned above.
When it concerns an ironing formulation, the latter which can be sprayed directly onto the dry laundry before the ironing operation.
Said ironing formulation can additionally comprise nonionic surface-active agents (from 0.5 to 5%), anionic surface-active agents (from 0.5 to 5%), fragrances (0.1 to 3%) or cellulose derivatives (0.1 to 3%), such as starch.
When it concerns a prespotter, the latter is provided in the form of an aqueous dispersion or of a solid (stick).
Other constituents apart from the copolymer (C) can be present, of the type
A third subject matter of the invention consists of the use, in a composition for the treatment of articles made of textile fibers intended to be employed in an operation in which said articles are washed and/or rinsed, prespotted, dried in a tumble dryer or ironed, of at least one linear sulfonated copolymer (C) described above as soil release and/or antiredeposition and/or detergent agent.
The amount of copolymer (C) to be employed and the treatment conditions have already been mentioned above; it is the same for the nature and for the amount of the various constituents of the treatment composition.
A fourth subject matter of the invention consists of a process for improving the properties of a composition intended for washing and/or rinsing, prespotting, drying in a tumble dryer or ironing said articles made of textile fibers by addition to said composition of at least one linear sulfonated copolymer (C) described above in an amount which is effective in contributing soil release and/or antiredeposition and/or detergency properties to said compositions.
The amount of copolymer (C) to be employed and the treatment conditions have already been mentioned above; it is the same for the nature and for the amount of the various constituents of the treatment composition.
The following examples are given by way of illustration.
Analyses and Measurements
The analyses by 1H NMR spectroscopy were carried out on a Bruker AMX 300 spectrometer at 300 MHz and at ambient temperature in deuterated trifluoroacetic acid (d-TFA).
The weight-average molar mass is determined as follows by Gel Permeation Chromatography:
The measurement is carried out in a dichloromethane+2/1000 (by volume) trifluoroacetic anhydride+0.005M BF4N(Bu)4 mixture at ambient temperature.
The characteristics of the apparatus are as follows:
The solution injected (100 μl) comprises approximately 0.5% (x mg/y ml of solvent) of linear sulfonated copolymer dissolved in a 95% dichloromethane, 5% TFAA, 0.005M BF4N(Bu)4 and 2/1000 toluene mixture. The molar masses are given in polystyrene equivalents.
Synthesis of a linear sulfonated copolymer PEA1 from
22.4 g of E-caprolactam and 37.4 g of the sulfonated polyester (PES1) are introduced into a reactor equipped with a mechanical stirrer (anchor type) and with a reflux condenser and heated by a thermally regulated Wood's alloy bath. After purging with argon, the medium is brought to 100° C. After starting to stir (45 revolutions/minute), 50 μl of a 50% hypophosphorous acid solution in water are added. The reactor is placed under an argon blanket; the medium is brought to 250° C. at the rate of a temperature rise of 4° C. per minute. After stirring at 250° C. for 7 h, the contents of the reactor are poured onto a Teflon (polytetrafluoro-ethylene) sheet.
The linear sulfonated copolymer PEAl obtained exhibits a weight-average molar mass of 5030 g/mol, determined by gel permeation chromatography. Its analysis by 1H NMR spectroscopy showed that it comprises polyamide 6 blocks with a mean degree of polymerization of 1.7, distributed at 41% in the form of chain ends of type (V) and 59% in the form of “esteramide” units (I) and that the ratio by weight of the residues resulting from the sulfonated polyester (PES1) to the residues resulting from the ε-caprolactam in the copolymer PEA1 is 66/34.
The operation described in example I is repeated, starting from 13.8 g of ε-caprolcatam, 46.2 g of sulfonated polyester (PES1) and 32 μl of 50% hypophosphorous acid solution in water.
The weight-average molar mass of the linear sulfonated copolymer PEA2 obtained is 4110 g/mol. The mean degree of polymerization of the polyamide 6 blocks is 1.35. The polyamide 6 blocks are distributed 45% in the form of chain ends of type (V) and 55% in the form of “esteramide” units (I) and the ratio by weight of the residues resulting from the sulfonated polyester (PES1) to the residues resulting from the ε-caprolactam in the copolymer PEA2 is 78/22.
The operation described in example I is repeated, starting from 7.8 g of ε-caprolactam, 52.2 g of sulfonated polyester (PES1) and 20 μl of 50% hypophosphorous acid solution in water.
The weight-average molar mass of the linear sulfonated copolymer PEA3 obtained is 4710 g/mol. The mean degree of polymerization of the polyamide 6 blocks is 1.28. The polyamide 6 blocks are distributed 45% in the form of chain ends of type (V) and 55% in the form of “esteramide” units (I) and the ratio by weight of the residues resulting from the sulfonated polyester (PES1) to the residues resulting from the ε-caprolactam in the copolymer PEA3 is 88/12.
Synthesis of a linear sulfonated copolymer PEA4 from polyamide 6 (weight-average molar mass of 42 000 g/mol) and from sulfonated polyester (PES1).
22.5 g of sulfonated polyester (PES1), 7.5 g of polyamide 6 and 32 mg of zinc acetate dihydrate are introduced into a reactor equipped with a mechanical stirrer (anchor type) and with a receiver and heated by a thermally regulated Wood's alloy bath. After purging by 3 vacuum argon cycles, the medium is brought to 100° C. After starting to stir (60 revolutions/min), the temperature is increased to 250° C. over 30 minutes. After stirring at 250° C. for 6 h, the contents of the reactor are poured onto a Teflon polytetrafluoroethylene) sheet.
The linear sulfonated copolymer PEA4 exhibits a weight-average molar mass of 5570 g/mol, determined by gel permeation chromatography. Its analysis by 1H NMR spectroscopy showed that it comprises polyamide 6 blocks with a mean degree of polymerization of 1.3, distributed 45% in the form of chain ends of type (V) and 55% in the form of “esteramide” units (I) and that the ratio by weight of the residues resulting from the sulfonated polyester (PES1) to the residues resulting from polyamide 6 in the copolymer PEA4 is 78/22.
The operation described in example IV is repeated, starting from 5.0 g of polyamide 6, 45.5 g of sulfonated polyester (PES1) and 50 mg of zinc acetate dihydrate.
The weight-average molar mass of the linear sulfonated copolymer PEAS obtained is 18 900 g/mol. The mean degree of polymerization of the polyamide 6 blocks is 1.40. The polyamide 6 blocks are distributed 45% in the form of chain ends of type (V) and 55% in the form of “esteramide” units (I) and the ratio by weight of the residues resulting from the sulfonated polyester (PES1) to the residues resulting from polyamide 6 in the copolymer PEAS is 91/9.
Soil Release Properties
The soil release polymers to be tested are introduced into the detergent composition based on anionic surface-active agents for a washing machine of table 1 in a proportion of 1% by weight of active material of copolymer (C) according to the invention.
Test
Prewashing:
Squares with dimensions of 10×10 cm, made of
The squares of fabrics are subsequently rinsed 3 times for 5 minutes with faucet water and are then dried in an oven.
The reflectance R1 of the test specimens is measured using a reflectometer using the Dr. Lange/LUCI 100 calorimeter, according to the “L”, “a” and “b” system (scale from black to white, from green to red and from blue to yellow).
[R1=(L12+a12+b12)1/2]
Staining:
The prewashed test specimens are subsequently stained by depositing on each test specimen,
The reflectance R2 of the test specimens after staining is measured, according to the “L”, “a” and “b” system.
[R2=(L22+a22+b22)1/2]
Washing:
6 test specimens (2 made of knitted polyester, 2 made of woven polyester and 2 made of polyamide) are washed separately according to the type of stain, this being carried out under the same conditions as those of the prewashing (at 40° C. for 20 minutes, using 5 g of detergent comprising 1% of active material of polymer per 1 liter of water of 30° HT, then 3 rinsings of 5 minutes with cold water and drying).
The reflectance R3 after washing the stained test specimens is measured, according to the “L”, “a” and “b” system.
[R3=(L32+a32+b32)1/2]
Evaluation
The effectiveness of the polymer tested as soil release agent with respect to the soybean oil stains colored by a violet dye is assessed by the % of removal of the stains, calculated by the formula
ΔE in %=100×(R3−R2)/(R1−R2)
The effectiveness of the polymer tested as soil release agent with respect to the dirty motor oil (DMO) stains is assessed by the % of removal of the stains, calculated by the formula
ΔL in %=100×(L3−L2)/(L1−L2)
The results obtained appear in table 1a and are compared with those obtained:
It is found that, in a composition based on anionic surfactants, the copolymer (C) has an excellent performance as soil release agent toward dirty motor oil (DMO) on polyamide; this performance is better than that of the sulfonated polyester (PES1) of the prior art. Its performance is very similar to that of the sulfonated polyester (PES1) of the prior art toward violet dye, this being the case whether on polyamide or polyester.
The soil release test described in example VI is repeated, the detergent composition for a washing machine which appears in table 2, based on a mixture of anionic and nonionic surface-active agents, being used. The results obtained appear in table 2a and are compared with those obtained:
It was found that, in a composition based on a mixture of anionic and nonionic surfactants, the copolymer (C) has an excellent performance as soil release agent toward dirty motor oil (DMO) and violet dye on polyamide; this performance is better than that of the sulfonated polyester (PES1) of the prior art. Its performance is very similar to that of the sulfonated polyester (PES1) of the prior art toward violet dye on polyester.
| Number | Date | Country | Kind |
|---|---|---|---|
| 02/03237 | Mar 2002 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/FR03/00802 | 3/13/2003 | WO |
