Color care detergent composition

Abstract

The present invention provides a liquid laundry detergent composition that reduces dye bleeding from fabrics. [Solution] A liquid laundry detergent composition comprising a surfactant system and a cationic polymer, wherein the liquid laundry detergent composition comprises 5.0% to 60% by weight of the surfactant system, the surfactant system comprises a branched-chain nonionic surfactant, the cationic polymer is selected from poly(diallyldimethylammonium chloride), a copolymer of diallyldimethylammonium chloride and acrylic acid, a copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid, and mixtures thereof, the surfactant system comprises the branched-chain nonionic surfactant at a concentration of 1.0% to 10% by weight of the composition, and the cationic polymer is present at a concentration of 0.5% to 2.5% by weight of the composition.

Description

[Technical Field]

[0001] Laundry detergent compositions, particularly liquid laundry detergent compositions or unit-dose articles that provide improved care for colored fabrics. [Background technology]

[0002] Laundry detergent compositions are formulated to provide good cleaning to fabrics in order to keep white fabrics white and colored fabrics bright. Laundry detergent compositions are also typically formulated to remove stains and dirt. However, in addition to removing dirt, laundry detergent compositions are known to also remove dyes from colored fabrics, causing fading of colored fabrics. In addition, dyes can adhere to other fabrics washed in the same cycle, causing discoloration of fabrics washed together.

[0003] To limit color transfer to fabrics washed simultaneously, color transfer inhibitor (DTI) polymers are often incorporated into commercially available detergent compositions for washing colored fabrics. Typical color transfer inhibitors are typically based on polymers such as polyvinylpyrrolidone homopolymer (PVP), polyvinylpyrrolidone / polyvinylimidazole copolymer (PVP / PVI), and poly-4-vinylpyridine N-oxide (PVNO). However, while such DTI polymers reduce color transfer to fabrics washed simultaneously, they do not prevent dye bleeding from fabrics that results in dye fading.

[0004] Therefore, detergent compositions that reduce dye bleeding from fabrics are still needed.

[0005] International Publication No. 2010025116(A1) relates to a stable color-maintaining and / or restoration composition comprising at least one cationic polymer and an anionic surfactant, and a method for providing the same. International Publication No. 2013070560(A1) relates to a surface treatment composition comprising a specific cationic polymer(s), an anionic surfactant, one or more shielding salts, and a hydrophobic association disruptor, wherein the surface treatment composition comprises at least 6% by weight of a cationic polymer, at least 6% by weight of an anionic surfactant, and at least 4% by weight of a shielding salt, the weight ratio of the anionic surfactant to the cationic polymer being 0.5:1 to 4:1, and the weight ratio of the shielding salt to the cationic polymer being 0.3:1 to 3:1. International Publication No. 01 / 72937(A1) relates to a method for reducing dye loss during the washing of dyed fabrics by using a washing treatment composition comprising a water-soluble or water-dispersible reconstructing agent for adhering to the fabric during the treatment process, wherein the material undergoes a chemical change during the treatment process, thereby increasing the material's affinity to the fabric. International Publication No. 2014139577(A1) relates to a two-component color detergent composition for use at low temperatures, comprising or consisting of a first component comprising at least one nonionic surfactant and a second component comprising at least one percarbonate (bleaching agent) and tetraacetylethylenediamine (TAED), as well as a method for preparing such a two-component color detergent composition, and their use for washing laundry items, particularly colored laundry items.International Publication No. 2017 / 044749(A1) relates to a laundry or cleaning composition comprising (i) at least one cationic polymer selected from the group consisting of polyacrylamidopropyltrimethylammonium chloride poly(APTAC), polydiallyldimethylammonium chloride poly(DADMAC), polyAPTAC copolymer, polyDADMAC copolymer, polyAPTAC terpolymer, and / or polyDADMAC terpolymer, in about 0.001% to about 50% by weight; (ii) at least one nonionic surfactant in about 0.01% to about 50% by weight; (iii) optionally at least one enzyme in about 0.001% to about 5% by weight; and (iv) optionally at least one laundry or cleaning additive in about 0.01% to about 25% by weight, wherein the composition can exhibit colorfastness or color retention. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] International Publication No. 2010025116(A1) [Patent Document 2] International Publication No. 2013070560(A1) [Patent Document 3] International Publication No. 01 / 72937(A1) [Patent Document 4] International Publication No. 2014139577(A1) [Patent Document 5] International Publication No. 2017 / 044749(A1) [Overview of the project] [Means for solving the problem]

[0007] The present invention relates to a laundry detergent composition comprising a surfactant system and a cationic polymer, wherein the surfactant system comprises a branched-chain nonionic surfactant, the cationic polymer is selected from poly(diallyldimethylammonium chloride), a copolymer of diallyldimethylammonium chloride and acrylic acid, a copolymer of acrylamide and methacrylamidopropyltrimethylammonium chloride, a copolymer of acrylamide and diallyldimethylammonium chloride, a copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid, a copolymer of acrylamide, methacrylamidopropyltrimethylammonium chloride and acrylic acid, a copolymer of acrylamide, diallyldimethylammonium chloride and acrylic acid, a copolymer of acrylamide and N,N,N-trimethylaminoethyl acrylate, a copolymer of diallyldimethylammonium chloride and vinyl alcohol, and mixtures thereof, the cationic polymer has a molecular weight of 1,000 Da to 1,250,000 Da, and the branched-chain nonionic surfactant is of formula I:R1-CH(R2)-O-(PO) x (EO) y (PO) z -H, in formula I, R1 is a C4-C14 alkyl chain, preferably C4-C8, more preferably C6; R2 is a C1-C7 alkyl chain, preferably C1-C5, more preferably C3 alkyl chain; x is 0-10, preferably 0-5, more preferably 0-3; y is 5-20, preferably 6-15, more preferably 7-12; z is 0-20, preferably 0-5, more preferably 0-3; EO represents ethoxylation; PO represents propoxylation; formula II: R1-CH(R2)CH2-O-(PO) x (EO) y (PO) z-H. In Formula II, R1 is a C3-C13 alkyl chain, preferably C3-C7, more preferably C5; R2 is a C1-C7 alkyl chain, preferably C1-C5, more preferably C3 alkyl chain; x is 0-10, preferably 0-5, more preferably 0-3; y is 5-20, preferably 6-15, more preferably 7-12; z is 0-20, preferably 0-5, more preferably 0-3; EO represents ethoxylation, PO represents propoxylation, and is selected from these mixtures.

[0008] The present invention further relates to the use of a laundry detergent composition comprising a branched-chain nonionic surfactant for improving color protection, preferably color retention, of colored fabrics during washing.

Mode for Carrying Out the Invention

[0009] It has been found that the detergent composition of the present invention reduces dye fading during washing.

[0010] Unless otherwise noted, all component or composition levels relate to the active portion of that component or composition, and impurities that may be present in commercial sources of such components or compositions, such as residual solvents or by-products, are excluded.

[0011] All percentages and ratios are calculated on a weight basis unless otherwise indicated. All percentages and ratios are calculated based on the total composition unless otherwise indicated.

[0012] Unless otherwise specified, all measurements are carried out at 25 °C.

[0013] As used herein, articles such as "a" and "an" are understood to mean one or more of what is claimed or described when used in the claims.

[0014] Laundry detergent composition: The laundry detergent composition may be in any suitable form such as liquid, paste, granule, solid, powder, etc., or may be combined with a carrier such as a substrate. Preferred laundry detergent compositions are either liquid or granule, with liquid being most preferred.

[0015] As used herein, "liquid detergent composition" refers to a fluid, preferably a liquid detergent composition that can wet and clean fabrics, such as clothes, in a household washing machine. As used herein, "laundry detergent composition" refers to a composition suitable for washing clothes. The composition may suitably contain solids or gases in a subdivided form, but the overall composition excludes product forms that are non-liquid as a whole, such as tablets or granules. Liquid laundry detergent compositions exclude any solid additives, but if present, include any foam and preferably have a density in the range of 0.9 to 1.3 grams per cubic centimeter, more specifically 1.00 to 1.10 grams per cubic centimeter.

[0016] The composition can be an aqueous liquid laundry detergent composition. In such an aqueous liquid laundry detergent composition, the water content can be present at a level of 5.0 wt% to 95 wt%, preferably 25 wt% to 90 wt%, more preferably 50 wt% to 85 wt% of the liquid detergent composition.

[0017] The pH range of the detergent composition is 6.0 to 8.9, preferably 7 to 8.8.

[0018] The detergent composition can also be encapsulated in a water-soluble film to form a unit-dose article. Such a unit-dose article contains the detergent composition of the present invention, the detergent composition contains less than 20% by weight, preferably less than 15% by weight, and more preferably less than 10% by weight of water, and the detergent composition is encapsulated in a water-soluble or water-dispersible film. Such a unit-dose article can be formed using any means known in the art. A suitable unit-dose article may contain one compartment, which contains the liquid laundry detergent composition. Alternatively, the unit-dose article may be a multi-compartment unit-dose article in which at least one compartment contains the liquid laundry detergent composition.

[0019] Cationic polymers Cationic polymers include poly(diallyldimethylammonium chloride)(polyquaternium 6), copolymers of diallyldimethylammonium chloride and acrylic acid (e.g., polyquaternium 22), copolymers of acrylamide and methacrylamidopropyltrimethylammonium chloride, copolymers of acrylamide and diallyldimethylammonium chloride (polyquaternium 7), copolymers of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid (polyquaternium 47), copolymers of acrylamide, methacrylamidopropyltrimethylammonium chloride and acrylic acid (polyquaternium 53), and copolymers of acrylamide, diallyldimethylammonium chloride and acrylic acid (polyquaternium 39) The cationic polymer is selected from the group consisting of a copolymer of acrylamide and N,N,N-trimethylaminoethyl acrylate, a copolymer of diallyldimethylammonium chloride and vinyl alcohol, and mixtures thereof. Preferably, the cationic polymer is selected from poly(diallyldimethylammonium chloride) (e.g., polyquaternium 6), a copolymer of diallyldimethylammonium chloride and acrylic acid (e.g., polyquaternium 22), a copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid (e.g., polyquaternium 47), and mixtures thereof. More preferably, the cationic polymer is a copolymer of diallyldimethylammonium chloride and acrylic acid (e.g., polyquaternium 22).

[0020] In the case of copolymers of diallyldimethylammonium chloride and acrylic acid, the preferred ratio of diallyldimethylammonium chloride to acrylic acid is approximately 90:10 to 50:50. A preferred cationic polymer is a copolymer of diallyldimethylammonium chloride and acrylic acid in a 65 / 35 molar ratio, having a molecular weight of approximately 450,000. Copolymers of diallyldimethylammonium chloride and acrylic acid may be further described by the nomenclature polyquaternium-22 or PQ22, as named under the International Nomenclature for Cosmetic Ingredients. Copolymers of acrylamide and diallyldimethylammonium chloride may be further described by the nomenclature polyquaternium-7 or PQ7, as named under the International Nomenclature for Cosmetic Ingredients.

[0021] Table 1 below contains the cation charge density and monomer molecular weight for the selected cationic polymers.

[0022] [Table 1]

[0023] The cationic polymer can be present in the composition at a concentration of 0.1% to 10% by weight, preferably 0.5% to 5.0% by weight, and more preferably 1.0% to 2.5% by weight.

[0024] The cationic polymer has a molecular weight of 1,000 Da to 1,250,000 Da, preferably 100,000 Da to 1,000,000 Da, and more preferably 250,000 Da to 750,000 Da.

[0025] Cationic polymers can have a charge density in the range of 0.05 to 25 meq / g when calculated at pH 7. While not theoretically bound, the molecular weight, charge density, and presence of hydrophobic units within the polymer structure of a cationic polymer can influence the ability of a shielding salt to effectively prevent the formation of polymer-surfactant complexes.

[0026] Furthermore, the charge density may be in the range of 0.05 to 25 meq / g when calculated at pH 7, or preferably less than 7.0 meq / g, more preferably less than 5.0 meq / g, and even more preferably less than 3.0 meq / g when calculated at pH 7. As used herein, “charge density” refers to the net charge density of the polymer itself and may differ from that of the monomer raw materials. The charge density can be calculated by dividing the net number of charges per repeating unit by the molecular weight of the repeating unit and then multiplying by 1000. It should be noted that positive charges may be located in the main chain and / or side chains of the cationic polymer. In the case of cationic polymers having amine monomers, the charge density depends on the pH of the support, and therefore the charge density for comparison with the present disclosure should be measured at pH 7.

[0027] Surfactant-based The laundry composition may contain a surfactant system at a concentration of 2.5% to 60% by weight, preferably 5.0% to 25% by weight, and most preferably 7.0% to 15% by weight of the composition.

[0028] As used herein, a suitable surfactant means a surfactant or mixture of surfactants that provides cleaning, stain removal, or laundry benefits to soiled materials. Cleaning surfactants can be selected from anionic surfactants, nonionic surfactants, bipolar ionic surfactants, and combinations thereof.

[0029] The surfactant system includes branched-chain nonionic surfactants. The surfactant system may further include surfactants selected from the group consisting of anionic surfactants, amphoteric surfactants, and mixtures thereof. Therefore, the surfactant system may include combinations of anionic surfactants and nonionic surfactants, more preferably combinations of anionic surfactants, nonionic surfactants, and amphoteric surfactants.

[0030] Preferably, a surfactant containing a saturated alkyl chain is used.

[0031] Branched-chain nonionic surfactant This surfactant system can contain a branched-chain nonionic surfactant at a concentration of 0.1% to 12% by weight, preferably 0.5% to 10% by weight, and most preferably 1.0% to 3.0% by weight of this composition.

[0032] Suitable branched-chain nonionic surfactants can be derived from primary or secondary alcohols. The branched-chain nonionic surfactant is selected from the following. a) Formula I: R1-CH(R2)-O-(PO) x (EO) y (PO) z -H In Formula I, R1 is a C4-C14 alkyl chain, preferably a C4-C8 alkyl chain, more preferably a C6 alkyl chain, R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain, x is 0-10, preferably 0-5, more preferably 0-3, y is 5-20, preferably 6-15, more preferably 7-12, z is 0-20, preferably 0-5, more preferably 0-3, EO represents ethoxylation, and PO represents propoxylation. b) Formula II: R1-CH(R2)CH2-O-(PO) x (E0) y (PO) z -H In Formula II, R1 is a C3-C13 alkyl chain, preferably a C3-C7 alkyl chain, more preferably a C5 alkyl chain, R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain, x is [0-10], preferably 0-5, more preferably 0-3, y is 5-20, preferably 6-15, more preferably 7-12, z is 0-20, preferably 0-5, more preferably 0-3, EO represents ethoxylation, and PO represents propoxylation.

[0033] It should be noted that in the translation of line , the "x is [0-10]" in the original Chinese seems to be a typo. It should be "x is 0-10" in the English translation.Preferred branched nonionic ethoxylates according to Formula I are available under the trade name Tergitol® 15-S, having an alkoxylation degree of 3 to 40. For example, Tergitol® 15-S-20 has an average alkoxylation degree of 20. Other suitable commercially available materials according to Formula I are available under the trade names Softanol® M and EP series.

[0034] Preferred branched nonionic surfactants according to Formula II are Guerbet C10 alcohol ethoxylates having 7 or 8EO, such as Ethylan® 1007 and 1008, and commercially available Guerbet C10 alcohol alkoxylated nonionic surfactants (ethoxylated and / or propoxylated) of the Lutensol® XL series (XL50, XL70, etc.). Other representative alkoxylated branched nonionic surfactants include those available from BASF Corporation under trade names Lutensol® XP30, Lutensol® XP-50, and Lutensol® XP-80. Generally, Lutensol® XP-30 can be considered to have three repeating ethoxy groups, Lutensol® XP-50 can be considered to have five repeating ethoxy groups, and Lutensol® XP-70 can be considered to have seven repeating ethoxy groups. Other suitable branched-chain nonionic surfactants include oxo-branched-chain nonionic surfactants such as Lutensol® ON50 (5EO) and Lutensol® ON70 (7EO). Another suitable branched-chain nonionic surfactant is Plurafac® SLF170 (3PO, 12EO, 15PO). Also suitable are ethoxylated aliphatic alcohols obtained by the Fischer-and-Tropsch reaction and ethoxylated aliphatic alcohols derived from the oxo reaction, including those produced from Sasol's Safol® alcohol, with a maximum branching of 50% (40% methyl (mono or bi) 10% cyclohexyl), where at least 50% by weight of the alcohol is a C2 isomer (methyl to pentyl), such as those produced from Sasol's Isalchem® alcohol or Lial® alcohol.

[0035] Further nonionic surfactants The liquid detergent composition may contain further nonionic surfactants. The concentration of the further nonionic surfactant in the liquid detergent composition may be less than 15% by weight, preferably less than 7.0% by weight, more preferably less than 5.0% by weight, and even more preferably less than 3.0% by weight. Most preferably, the composition does not contain further nonionic surfactants.

[0036] Suitable nonionic surfactants include, but are not limited to, linear C12-C18 alkyl ethoxylates ("AEs"), including so-called narrow-peak alkyl ethoxylates, and C6-C12 alkylphenol alkoxylates (particularly ethoxylates and ethoxy / propoxy mixtures), blocked alkylene oxide condensates of C6-C12 alkylphenols, alkylene oxide condensates of C8-C22 alkanols, and ethylene oxide / propylene oxide block polymers (Pluronic, BASF Corp.). Semipolar nonionic substances (e.g., amine oxides and phosphine oxides) can also be used in the compositions of the present invention. A broad disclosure of these types of surfactants can be found in U.S. Patent No. 3,929,678.

[0037] Alkyl polysaccharides, such as those disclosed in U.S. Patent No. 4,565,647, are also useful nonionic surfactants in the compositions of the present invention.

[0038] Alkyl polyglucoside surfactants are also suitable.

[0039] As a further nonionic surfactant, formula R1(OC2H4) n Examples include OH groups, where R1 is a linear C10-C16 alkyl group or a C8-C12 alkylphenyl group, and n is preferably 3-80. In some embodiments, the nonionic surfactant may be a condensation product of a linear C12-C15 alcohol, for example, a C12-C13 alcohol condensed with 5-20 moles of ethylene oxide per mole of alcohol, for example, 6.5 moles of ethylene oxide per mole of alcohol.

[0040] Anionic surfactants This surfactant system may contain an anionic surfactant at a concentration of 1.4% to 52% by weight, preferably 4.4% to 20% by weight, and more preferably 5.9% to 11.5% by weight of the liquid laundry detergent composition.

[0041] The surfactant system may further include anionic surfactants selected from the group consisting preferably of sulfonate surfactants, sulfate surfactants, and mixtures thereof, and more preferably the anionic surfactants include sulfonate surfactants and sulfate surfactants. Suitable anionic surfactants also include fatty acids and their salts, which are typically added as builders. However, any anionic surfactant known in the art of detergent compositions, such as those disclosed in WMLinfield, Marcel Dekker, "Surfactant Science Series," Vol. 7, can be used essentially. However, the composition preferably contains at least a sulfonic acid surfactant, such as linear alkylbenzene sulfonic acid, although water-soluble salt forms may also be used. Alkyl sulfates or mixtures thereof are also preferred. Combinations of linear alkylbenzene sulfonates and alkyl sulfate surfactants are particularly preferred for improving stain removal.

[0042] Suitable anionic sulfonate or sulfonic acid surfactants for use herein include alkylbenzene sulfonates, alkyl ester sulfonates, alkanesulfonates, acid and salt forms of alkylsulfonated polycarboxylic acids, and mixtures thereof. Suitable anionic sulfonate or sulfonic acid surfactants include C5-C20 alkylbenzene sulfonates, more preferably C10-C16 alkylbenzene sulfonates, more preferably C11-C13 alkylbenzene sulfonates, C5-C20 alkyl ester sulfonates, C6-C22 primary or secondary alkanesulfonates, C5-C20 sulfonated (poly)carboxylic acids, and any mixtures thereof, but C11-C13 alkylbenzene sulfonates are preferred. The 2-phenyl isomer content of the above surfactants can vary widely.

[0043] Suitable anionic sulfate salts for use in the compositions of the present invention include primary and secondary alkyl sulfates having a linear or branched alkyl or alkenyl moiety having 9 to 22 carbon atoms, or more preferably 12 to 18 carbon atoms. Beta-branched alkyl sulfate surfactants, or mixtures of commercially available substances, having a weight-average degree of branching of at least 50% (of the surfactant or mixture) are also useful.

[0044] Medium-chain branched alkyl sulfates or sulfonates are also suitable anionic surfactants for use in the compositions of the present invention. Preferred are medium-chain branched alkyl primary sulfates of C5 to C22, preferably C10 to C20. When using mixtures, the preferred average total number of carbon atoms in the alkyl portion is preferably in the range of greater than 14.5 to 17.5. Preferred mono-methyl branched primary alkyl sulfates are selected from the group consisting of 3-methyl~13-methylpentadecanol sulfate, the corresponding hexadecanol sulfate, and mixtures thereof. Dimethyl derivatives or other biodegradable alkyl sulfates with mild branching can also be used.

[0045] When used, alkylalkoxylylated sulfate surfactants can be a blend of one or more alkylethoxylylated sulfates. Suitable alkylalkoxylylated sulfates include C10-C18 alkylethoxylylated sulfates, more preferably C12-C15 alkylethoxylylated sulfates. Anionic surfactants can include alkyl sulfate surfactants, which have an average ethoxylation degree of 0.5-8.0, preferably 1.0-5.0, and more preferably 2.0-3.5.

[0046] Alternatively, anionic surfactants may include alkyl sulfate surfactants, which have a low degree of ethoxylation with an average degree of ethoxylation of less than 0.5, preferably less than 0.1, and are more preferably not ethoxylated. Preferred low ethoxylated alkyl sulfate surfactants do not involve further alkoxylation. Preferred low ethoxylated alkyl sulfate surfactants include branched alkyl sulfate surfactants. Branched alkyl sulfate surfactants may contain at least 20% by weight, preferably 60% to 100% by weight, and more preferably 80% to 90% by weight of a bibranched alkyl chain of the alkyl chain of the branched alkyl sulfate surfactant. Such branched alkyl sulfates having a bibranched alkyl chain may also be described as 2-alkylalkanol sulfate or 2-alkylalkyl sulfate. Branched alkyl sulfates can be neutralized with sodium, potassium, magnesium, lithium, calcium, ammonium, or any suitable amine, including but not limited to monoethanolamine, triethanolamine, and monoisopropanolamine, or with a mixture of neutralizing metals or amines. Preferred branched alkyl sulfate surfactants may contain alkyl chains with 10 to 18 carbon atoms (C10 to C18) or 12 to 15 carbon atoms (C12 to C15), with 13 to 15 carbon atoms (C13 to C15) being most preferred. Branched alkyl sulfate surfactants can be produced using a process that includes a hydroformylation reaction to provide a desired level of 2-branching. Particularly preferred branched alkyl sulfate surfactants contain 2-branching, which includes 20% to 80% by weight, preferably 30% to 65% by weight, and more preferably 40% to 50% by weight of methyl-branching, ethyl-branching, and mixtures thereof of 2-branching.

[0047] Suitable low-ethoxylated branched alkyl sulfate surfactants can be derived from alkyl alcohols, such as Lial® 145 and Isalchem® 145, both supplied by Sasol, and can be optionally blended with other alkyl alcohols to achieve the desired branching distribution.

[0048] When washing fabrics using the composition of the present invention containing such a low ethoxylated alkyl sulfate surfactant, particularly when the low ethoxylated alkyl sulfate surfactant includes the 2-branched type described above, it is possible to achieve a lower level of dye removal from the fabric during washing while maintaining washing performance when washing the fabric at a temperature of 30°C or lower.

[0049] However, the process of producing such alkyl ether sulfate anionic surfactants may result in trace amounts of residual 1,4-dioxane by-products. The amount of 1,4-dioxane by-products in alkoxylated alkyl sulfates, particularly ethoxylated alkyl sulfates, can be reduced. Based on recent technological advances, further reduction of 1,4-dioxane by-products can be achieved by subsequent stripping, distillation, solvent evaporation, centrifugation, microwave irradiation, molecular sieving, or catalytic or enzymatic decomposition steps. An alternative is to use alkyl sulfate anionic surfactants that contain only low levels of ethoxylation, or may even contain no ethoxylation at all. Thus, alkyl sulfate surfactants may have an ethoxylation degree of less than 1.0 or less than 0.5, or may not contain ethoxylation at all.

[0050] Other anionic surfactants suitable for use herein include fatty methyl ester sulfonates and / or alkyl polyalkoxylated carboxylates, such as alkyl ethoxylated carboxylates (AECs).

[0051] Anionic surfactants typically exist in the form of alkanolamines, or their salts with alkali metals such as sodium and potassium.

[0052] For improved stability and oil / grease removal, the liquid detergent composition may include a combination of linear alkylbenzene sulfonate surfactant and alkyl alkoxylated sulfate surfactant such that the ratio of linear alkylbenzene sulfonate surfactant to alkyl alkoxylated sulfate surfactant is 15:1 to 0.1:1, preferably 10:1 to 0.3:1, and more preferably 5:1 to 1:1.

[0053] Amphoteric surfactants and / or dipolar ionic surfactants This surfactant system may contain amphoteric surfactants and / or dipolar ionic surfactants at a concentration of 0.1% to 2.0% by weight, preferably 0.1% to 1.0% by weight, and more preferably 0.1% to 0.5% by weight of the liquid laundry detergent composition.

[0054] A suitable amphoteric surfactant is an amine oxide surfactant. An amine oxide surfactant is an amine oxide having the following formula: R1R2R3NO (wherein R1 is a hydrocarbon chain containing 1 to 30 carbon atoms, preferably 6 to 20, more preferably 8 to 16 carbon atoms, and R2 and R3 are, independently, saturated or unsaturated, substituted or unsubstituted, linear or branched hydrocarbon chains containing 1 to 4 carbon atoms, preferably 1 to 3 carbon atoms, and more preferably a methyl group). R1 ​​may be a saturated or unsaturated, substituted or unsubstituted, linear or branched hydrocarbon chain.

[0055] Suitable amine oxides used herein include, for example, preferably C, which is commercially available from Albright & Wilson. 12 ~C 14 Dimethylamine oxide is sold by Clariant under the trade name Genaminox(registered trademark) LA. 12 ~C 14This refers to amine oxide, or AROMOX® DMC, a commercially available product from AKZO Nobel.

[0056] Suitable amphoteric or bipolar ionic cleansing surfactants include those known for use in hair care or other personal care cleansing. Non-limited examples of suitable bipolar ionic or amphoteric surfactants are described in U.S. Patents 5,104,646 and 5,106,609. Suitable amphoteric surfactants include those broadly described as derivatives of aliphatic secondary and tertiary amines, where the aliphatic radical may be linear or branched, and one of the aliphatic substituents contains 8 to 18 carbon atoms, and the other contains an anionic group, such as a carboxyl group, sulfonic acid group, sulfate group, phosphate group, or phosphonic acid group. Suitable amphoteric surfactants for use in the present invention include, but are not limited to, cocoamphoacetate, cocoamphodiacetate, lauroamphoacetate, lauroamphodiacetate, and mixtures thereof.

[0057] Selective components The detergent composition may further contain one or more of the following optional components: external structuring agents or thickeners, enzymes, enzyme stabilizers, cleaning polymers, bleaching agents, fluorescent whitening agents, color dyes, particulate matter, fragrances and other odor control agents, hydrotropes, antifoaming agents, fabric care beneficial agents, pH adjusters, color transfer inhibitors, dye-fixing polymers, preservatives, non-fabric direct dyes, and mixtures thereof. In a more preferred embodiment, the laundry detergent composition does not contain bleach.

[0058] External structuring agents or thickeners: Preferred external structuring agents and thickeners are those that do not rely on charge-charge interactions in order to provide a structuring effect. Therefore, particularly preferred external structuring agents are non-charged external structuring agents selected from the group consisting of non-polymeric crystalline hydroxyl-functional structuring agents, such as hydrogenated castor oil; microfibrous cellulose; uncharged hydroxyethylcellulose; uncharged hydrophobic modified hydroxyethylcellulose; hydrophobic modified ethoxylated urethanes; hydrophobic modified nonionic polyols; and mixtures thereof.

[0059] Suitable polymer structuring agents include naturally derived and / or synthetic polymer structuring agents.

[0060] Examples of naturally derived polymer structuring agents used in the present invention include microfibrillated cellulose, hydroxyethyl cellulose, hydrophobically modified hydroxyethyl cellulose, carboxymethyl cellulose, polysaccharide derivatives, and mixtures thereof. Non-limiting examples of microfibrillated cellulose are described in International Publication No. 2009 / 101545(A1). Suitable polysaccharide derivatives include pectin, alginate, arabinogalactan (gum arabic), carrageenan, gellan gum, xanthan gum, guar gum, and mixtures thereof.

[0061] Examples of synthetic polymer structuring agents or thickeners used in the present invention include polycarboxylates, hydrophobic modified ethoxylated urethanes (HEUr), hydrophobic modified nonionic polyols, and mixtures thereof.

[0062] Preferably, the aqueous liquid detergent composition has a viscosity of 50 to 5,000, preferably 75 to 1,000, and more preferably 100 to 500 MPa.s, when measured at a shear rate of 100 s⁻¹ at a temperature of 20°C. For improved phase stability and stability of suspended components, the aqueous liquid detergent composition has a viscosity of 50 to 250,000, preferably 5,000 to 125,000, and more preferably 10,000 to 35,000 MPa.s, when measured at a shear rate of 0.05 s⁻¹ and a temperature of 20°C.

[0063] Cleaning Polymers: Detergent compositions preferably include cleaning polymers. Such cleaning polymers are thought to lift stains at least partially from textile fibers, allowing enzymatic systems to more effectively decompose complexes containing mannans and other polysaccharides. Suitable cleaning polymers provide broad-spectrum cleaning and / or suspension of dirt on surfaces and fabrics. Non-limiting examples of suitable cleaning polymers include amphiphilic alkoxylated grease cleaning polymers, clay stain cleaning polymers, dirt-releasing polymers, and dirt-suspending polymers. Preferred cleaning polymers include at least one compound of formula (I).

[0064] [ka] (In the formula, n is a number greater than or equal to 3.) At least one compound of formula (II)

[0065] [ka] (In the formula, A - The polymers can be obtained by free radical copolymerization with an anion, which is selected particularly from halides such as fluorides, chlorides, bromides, and iodides, alkyl sulfates such as sulfates, hydrogen sulfates, and methyl sulfates, and mixtures thereof. Such polymers are further described in European Patent No. 3196283(A1).

[0066] For similar reasons, polyester-based fouling-releasing polymers such as SRA300 supplied by Clariant are also particularly preferred.

[0067] Other useful cleaning polymers are described in U.S. Patent Application No. 20090124528(A1). The detergent composition may include an amphiphilic alkoxylylated grease-cleaning polymer with a balanced hydrophilicity and hydrophobicity to remove grease particles from fabrics and surfaces. The amphiphilic alkoxylylated grease-cleaning polymer may include a core structure and multiple alkoxylate groups bonded to that core structure. These may include, for example, alkoxylylated polyalkyleneimines. Examples of such compounds include, but are not limited to, ethoxylylated polyethyleneimines, ethoxylylated hexamethylenediamines, and their sulfated derivatives. Polypropoxylylated derivatives are also possible. A wide variety of amines and polyalkyleneimines can be alkoxylylated to varying degrees. A useful example is a 600 g / mol polyethyleneimine core ethoxylyzed to 20 EO groups per NH group, available from BASF. The alkoxylylated polyalkyleneimines may include an inner polyethylene oxide block and an outer polypropylene oxide block. The detergent composition may contain 0.1% to 10% by weight, preferably 0.1% to 8.0% by weight, and more preferably 0.1% to 2.0% by weight of the detergent polymer.

[0068] Dye transfer inhibitor polymers: Detergent compositions may contain one or more dye transfer inhibitor polymers. However, preferred compositions do not contain such dye transfer inhibitor polymers. It is known that during washing, a lot of fabric dye is distributed between the fabric and the washing solution. Thus, it is known that sealing the dye in the washing solution using DTI polymers increases the removal of dye from the fabric and therefore increases dye fading.

[0069] When used, suitable color transfer inhibitory polymers can be selected from the group consisting of polyvinylpyrrolidone homopolymer (PVP), polyvinylimidazole (PVI), copolymer of polyvinylpyrrolidone and polyvinylimidazole (PVP / PVI), polyvinylpyridine-N-oxide, poly-N-carboxymethyl-4-vinylpyridium chloride, poly(2-hydroxypropyldimethylammonium chloride), and mixtures thereof, preferably polyvinylpyrrolidone (PVP), polyvinylimidazole (PVI), copolymer of vinylpyrrolidone and vinylimidazole (PVP / PVI), and mixtures thereof. If present, the color transfer inhibitor may be present at a level of 0.05% to 5% by weight, or 0.1% to 3% by weight, and / or 0.2% to 2.5% by weight of the detergent composition.

[0070] Polyvinylpyrrolidone ("PVP") is amphiphilic, possessing highly polar amide groups that impart hydrophilic and polarity-attracting properties, and also having polar methylene and methane groups in its skeleton and / or rings that impart hydrophobic properties. The rings may also provide planar orientation with the aromatic ring in the dye molecule. PVP is readily soluble in aqueous and organic solvent systems. PVP is commercially available as either a powder or aqueous solution in several viscosity grades. The compositions of the present invention preferably utilize a copolymer of N-vinylpyrrolidone and N-vinylimidazole (also abbreviated herein as "PVPVI"). The copolymer of N-vinylpyrrolidone and N-vinylimidazole has been found to provide excellent color transfer inhibition performance. The copolymer of N-vinylpyrrolidone and N-vinylimidazole can have a molar ratio of N-vinylimidazole to N-vinylpyrrolidone of 1:1 to 0.2:1, more preferably 0.8:1 to 0.3:1, and most preferably 0.6:1 to 0.4:1. Copolymers of N-vinylpyrrolidone and N-vinylimidazole can be linear or branched. Particularly preferred polyvinylpyrrolidone (PVP), polyvinylimidazole (PVI), and vinylpyrrolidone-vinylimidazole copolymers (PVP / PVI) can have a weight-average molecular weight of 5,000 Da to 1,000,000 Da, preferably 5,000 Da to 50,000 Da, and more preferably 10,000 Da to 20,000 Da. The number-average molecular weight range is determined by light scattering, as described in Barth JHG and Mays JWC Chemical Analysis Vol 113, "Modern Methods of Polymer Characterization." Poly(N-vinyl-2-pyrrolidone) and poly(N-vinyl-imidazole) copolymers are commercially available from many suppliers, including BASF. The preferred DTI is commercially available from BASF (Germany, BASF SE) under the trade name Sokalan® HP 56 K.

[0071] Organic builders and / or chelating agents: Laundry detergent compositions may contain one or more organic builders and / or chelating agents in an amount of 0.6% to 10% by weight, preferably 2% to 7% by weight. Suitable organic builders and / or chelating agents include MEA citrate, citric acid, aminoalkylene poly(alkylene phosphonate), alkali metal ethane 1-hydroxydisphosphonate, and nitrilotrimethylene, phosphonate, diethylenetriaminepenta(methylenephosphonic acid) (DTPMP), ethylenediaminetetra(methylenephosphonic acid) (DTMP), hexamethylenediaminetetra(methylenephosphonic acid), hydroxyethylene 1,1-diphosphonic acid (HEDP), and hydroxyethanedimethylenephosphonic acid. The following are selected from the group consisting of catechol sulfonates such as ethylenediamine disuccinate (EDDS), ethylenediaminetetraacetic acid (EDTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), methylglycinediacetic acid (MGDA), iminodisuccinate (IDS), hydroxyethyliminodisuccinate (HIDS), hydroxyethyliminodiacetic acid (HEIDA), glycinediacetic acid (GLDA), diethylenetriaminepentaacetic acid (DTPA), Tiron™, and mixtures thereof.

[0072] Enzymes: Suitable enzymes provide cleaning performance and / or fabric care effects. Examples of suitable enzymes include, but are not limited to, hemicellulase, peroxidase, protease, cellulase, xylanase, lipase, phospholipase, esterase, cutinase, pectinase, keratinase, reductase, oxidase, phenol oxidase, lipoxygenase, ligninase, pullulanase, tannase, pentosanase, malanases, β-glucanase, arabinosidase, hyaluronidase, chondroitinase, laccase, and known amylases, or combinations thereof. Preferred enzyme combinations include cocktails of conventional cleaning enzymes such as proteases, lipases, cutinases, and / or cellulases, along with amylase. Cleaning enzymes are described in detail in U.S. Patent No. 6,579,839.

[0073] Enzyme stabilizers: Enzymes can be stabilized using any known stabilizer system such as calcium and / or magnesium compounds, boron compounds and substituted boric acid, aromatic borate esters, peptides and peptide derivatives, polyols, low molecular weight carboxylates, relatively hydrophobic organic compounds [e.g., certain esters, dialkyl glycol ethers, alcohols, or alcohol alkoxylates], alkyl ether carboxylates in addition to calcium ion sources, benzamidine hypochlorite, lower aliphatic alcohols and carboxylic acids, N,N-bis(carboxymethyl)serine salts; (meth)acrylic acid-(meth)acrylic acid ester copolymers and PEGs; lignin compounds, polyamide oligomers, glycolic acid or salts thereof; polyhexamethylene biguanide or N,N-bis-3-amino-propyl-dodecylamine or salts; and mixtures thereof.

[0074] Colorants: Detergent compositions may contain fabric colorants (sometimes referred to as tinters, bluing agents, or whitening agents). Typically, colorants impart a blue or bluish-purple hue to fabrics. Colorants can be used alone or in combination to create a specific hue and / or tint different types of fabrics. This can be achieved, for example, by mixing red and green-blue dyes to produce a blue or purple hue. The colorants may be selected from any known chemical classification of dyes, including, but not limited to, acridines, anthraquinones (including polycyclic quinones), azines, azos (e.g., monoazos, diazos, trisazos, tetrakissazos, polyazos) including premetallized azos, benzodifurans and benzodifuranones, carotenoids, coumarins, cyanines, diazahemicyanines, diphenylmethane, formazans, hemicyanines, indigoids, methanes, naphthalimides, naphthoquinones, nitros and nitroso, oxazines, phthalocyanines, pyrazoles, stilbenes, styryls, triarylmethanes, triphenylmethanes, xanthenes, and combinations thereof.

[0075] Fluorescent whitening agents: The detergent composition may contain 0.005% to 2.0%, preferably 0.01% to 0.1%, of a fluorescent agent (fluorescent whitening agent) based on the total weight of the detergent composition. Fluorescent agents are well known, and many are commercially available. Typically, these fluorescent agents are supplied and used in the form of alkali metal salts, such as sodium salts. Preferred types of fluorescent agents include distylyl biphenyl compounds, e.g., Tinopal® CBS-X; diaminostilbenisulfonic acid compounds, e.g., Tinopal® DMS pure Xtra and Blankophor® HRH; and pyrazoline compounds, e.g., Blankophor® SN. Preferred fluorescent agents are 2-(4-styryl-3-sulfophenyl)-2H-naphthol[1,2-d]triazole sodium, 4,4'-bis{[(4-anilino-6-(N-methyl-N-2-hydroxyethyl)amino1,3,5-triazine-2-yl)]amino}stilben-2-2'disulfonate disodium, 4,4'-bis{[(4-anilino-6-morpholino-1,3,5-triazine-2-yl)]amino}stilben-2-2'disulfonate disodium, and 4,4'-bis(2-sulfostyryl)biphenyl disodium.

[0076] Hydrotrope: The detergent composition may contain 0-30%, preferably 0.5-5%, more preferably 1.0-3.0%, of hydrotrope based on the total weight of the detergent composition, which can prevent liquid crystal formation. Therefore, the addition of hydrotrope helps the clarity / transparency of the composition. Suitable hydrotropes include, but are not limited to, salts of urea, benzenesulfonate, toluenesulfonate, xylenesulfonate, or cumenesulfonate. Preferably, the hydrotrope is selected from the group consisting of propylene glycol, xylenesulfonate, ethanol, and urea to provide optimal performance.

[0077] Particles: The composition may also contain particles, particularly when the composition further contains a structuring agent or a thickening agent. The composition may contain particles in an amount of 0.02% to 10%, preferably 0.1% to 4.0%, and more preferably 0.25% to 2.5%, based on total weight. Examples of such particles include beads, pearlescent agents, capsules, and mixtures thereof.

[0078] Suitable capsules are typically formed by at least partially, preferably completely, enclosing a beneficial agent with a wall material. Preferably, the capsule is a fragrance capsule, and the beneficial agent contains one or more fragrance raw materials. The capsule wall material may include melamine, polyacrylamide, silicone, silica, polystyrene, polyurea, polyurethane, polyacrylate-based materials, polyacrylate ester-based materials, gelatin, styrene-maleic anhydride, polyamide, aromatic alcohol, polyvinyl alcohol, resorcinol-based materials, poly-isocyanate-based materials, acetals (such as 1,3,5-triol-benzene-glutaraldehyde and 1,3,5-triol-benzenemelamine), starch, cellulose acetate phthalate, and mixtures thereof. Preferably, the capsule wall contains melamine and / or a polyacrylate-based material. The fragrance capsule may be coated with an adhesion aid, a cationic polymer, a nonionic polymer, anionic polymer, or a mixture thereof. Preferably, the fragrance capsules have a volume-weighted average particle size of 0.1 micrometers to 100 micrometers, preferably 0.5 micrometers to 60 micrometers. In particular, if the composition includes capsules having a shell formed at least partially from formaldehyde, the composition may further include one or more formaldehyde scavengers.

[0079] Method for preparing a laundry detergent composition Laundry detergent compositions can be prepared using any suitable process known to those skilled in the art. Typically, the components are blended together in any suitable order. Preferably, the cleaning surfactant is added as part of a concentrated premix to which other optional components are added. Preferably, the solvent is added last, or, if an external structuring agent is added, immediately before the external structuring agent, which is added as the last component.

[0080] How to wash fabric: The laundry detergent composition of the present invention can be used to wash fabrics. In particular, a laundry detergent composition containing a branched-chain nonionic surfactant can be used to improve color protection, preferably color retention, of colored fabrics during washing.

[0081] The laundry detergent composition of the present invention is particularly useful in preventing the removal of fabric dyes, selected from the group consisting of reactive dyes, disperse dyes, and mixtures thereof, from fabrics during the washing process, preferably the fabric dye is selected from the group consisting of disperse dyes, reactive dyes, and mixtures thereof.

[0082] The compositions of the present invention are particularly effective in reducing the removal of dyes from cotton-containing fabrics having dyes selected from the group consisting of reactive dyes, disperse dyes, direct dyes, vat dyes, and mixtures thereof. Preferably, the reactive dyes are selected from the group consisting of reactive black 5, reactive red 239, and reactive red 195; the direct dyes are selected from the group consisting of direct black 22 and direct red 83; and the vat dyes are selected from the group consisting of indigo (vat blue 1), sulfur black 1, and mixtures thereof. The compositions of the present invention are particularly useful in reducing the removal of dyes from cotton-containing fabrics having dyes selected from the group consisting of reactive dyes, particularly reactive black 5, reactive red 239, and mixtures thereof.

[0083] The compositions of the present invention are also effective in reducing the removal of dye from polyester-containing fabrics, particularly polyester-containing fabrics containing disperse dyes selected from the group consisting of disperse orange 30, disperse red 167, disperse blue 79, disperse red 60, and mixtures thereof, preferably disperse blue 79.

[0084] In this method and use, the laundry detergent composition can be diluted to provide a cleaning solution having a total surfactant concentration of more than 300 ppm, preferably 400 ppm to 2,500 ppm, and more preferably 600 ppm to 1,000 ppm. The fabric is then washed in the cleaning solution and preferably rinsed.

[0085] method: A) pH measurement: pH is measured at 25°C using a Santarius PT-10P pH meter with a gel-filled probe (e.g., Toledo probe, part number 52 000 100) calibrated according to the instruction manual. pH is measured in a 10% dilution in demineralized water (i.e., 1 part laundry detergent composition and 9 parts demineralized water).

[0086] B) Method for measuring viscosity: Viscosity is measured using a TA Instruments AR2000 rheometer with a 40 mm diameter, 1-degree angle cone-shaped plate. Viscosity at various shear rates is measured over 0.1 seconds for 3 minutes at 20°C. -1 ~1200s -1 It is obtained from the logarithmic shear rate sweep. Low shear viscosity is 0.05 s -1 It is measured by the continuous shear rate.

[0087] Examples: The following methodology was used to evaluate the effects of branched-chain and linear nonionic surfactants on dye bleeding during washing.

[0088] A glass vial (size 4 ml) was filled with 2 ml of the test detergent solution as described below, and then placed in a thermoshaker (Echotherm® Orbital Shaker) set to 40°C. The solution was held at this temperature for 15 minutes to equilibrium the temperature.

[0089] Colored fabric samples, as described below, were cut into 150 ± 1 mg pieces (weighed using a chemical balance). These pieces had an area of ​​approximately 2.5 × 2.5 cm (depending on the fabric used). Additional pieces of the same fabric were added as needed to reach the target weight.

[0090] Before returning the vial to the thermoshaker, each piece of cloth was folded and then inserted into the vial using a disposable glass rod to ensure the cloth was completely covered by the solution.

[0091] The vial was continuously shaken at a temperature of 40°C for 60 minutes (using a medium speed setting).

[0092] Next, the vial was removed from the thermos shaker, and the fabric was removed from the test detergent solution. The solution was kept in the dark for the time required to reach room temperature (25°C).

[0093] Dye desorption was quantified as follows. Each solution was placed in a 950 μl semi-microplastic cuvette, and their absorbance spectra were recorded using a UV-vis spectrophotometer (Cary UV-Vis Multicell Peltier supplied by Agilent), with absorbance measured from 300 nm to 900 nm.

[0094] To each solution, 50 μl of a 20 wt% aqueous solution of 2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethanol (Triton X-100 supplied by Sigma Aldrich) was added, and the absorbance spectra from 300 nm to 900 nm were remeasured. At the test concentrations used, Triton X-100 was observed to strongly reduce the scattering of the tested surfactant in the region overlapping with the dye absorption spectrum; therefore, Triton X-100 was added.

[0095] The calibration curves for each dye used were obtained using the following procedure. First, the following standard detergent solutions were prepared. 350 ppm aqueous solutions were prepared in water with a hardness of 2.67 mmol CaCO3 equivalent (1.93 mmol CaCO2 equivalent, 0.64 mmol MgCl2 equivalent, 15 gpg) containing equal parts by weight of linear C10-C13 alkylbenzene sulfonic acid (HLAS), linear C12-C15 alkyl ethoxy(3.0) sulfate (AE3.0S), and linear C12-C14 EO7 (Lorodac L726 supplied from Sasol). The pH of the resulting solutions was adjusted to 8.0 using ethanolamine.

[0096] 2.0 ml of the composition was placed in a glass vial along with 150 mg of each fabric and washed using the procedure described above, but at a temperature of 92°C for 15 minutes.

[0097] After cooling to room temperature in the dark, 950 μl of the resulting solution containing the desorbed dye was combined with 50 μl of a 20 wt% aqueous solution of 2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethanol (Triton X-100). The absorbance spectra were measured as described above, and these solutions were arbitrarily fixed as 95% dye desorption. The solutions were diluted with the following media: a 95% standard detergent solution was combined with 5% Triton X-100 (20 wt%) to obtain calibration curves for each dye used.

[0098] The absorbance values ​​(of the main peaks of different dye samples) obtained from the desorption experiments were reported as a percentage of the values ​​of the same dye desorbed using a standard detergent solution at 92°C in the calibration procedure described above.

[0099] The following solutions were evaluated for their effect on dye bleed on both dyed cotton fabric (cotton fabric dyed with Reactive Black 5 supplied by CFT under product code AISE code 21) and dyed polyester fabric (polyester fabric dyed with Dispersed Blue 79 supplied by CFT under product code AISE code 31), and the results are shown below. Except for Legs A and F (water), the solutions used in the remaining legs contained 350 ppm of surfactant.

[0100] [Table 2] 1 Hardness 2.67 mmol CaCO3 equivalent (15 gpg) 2 A 1:1:1 weight ratio of linear C10-C13 alkylbenzene sulfonic acid (HLAS), linear C12-C15 alkyl ethoxylate (3.0) sulfate (AE3.0S), and linear C12-C14 EO7 (Lordac® L726 supplied by Sasol). 3 Lordac® L726 supplied by Sasol 4 Lutensol® XP70 supplied by BASF 5 Plurafac® SLF180 supplied by BASF

[0101] [Table 3]

[0102] The effectiveness of detergent against dye bleeding from fabrics during washing can be determined by comparing Leg B with Leg A for cotton fabrics, and by comparing Leg G with Leg F for polyester fabrics.

[0103] Comparing dye bleed from legs D and E with leg C, it can be seen that branched-chain nonionic surfactants reduce dye bleed more effectively than linear-chain branched-chain nonionic surfactants when washing cotton. A comparison of legs I and J with leg H demonstrates the same benefit for branched-chain nonionic substances when washing polyester fabrics.

[0104] From legs B and G, it can be seen that when the washing temperature is reduced (from 92°C to 40°C), dye bleeding is reduced for both cotton and polyester fabrics.

[0105] The following comparative tests demonstrate the reduction of dye bleeding during washing when using the composition of the present invention.

[0106] The following compositions were prepared by simply mixing the following:

[0107] [Table 4] 6 The cationic polymer Merquat 281, with a molecular weight of 450,000 Da, is supplied by Lubrizol. 7 Polyvinyl acetate grafted polyethylene oxide copolymer having a polyethylene oxide main chain and multiple polyvinyl acetate side chains, supplied by BASF, Germany.

[0108] Cotton fabric, pre-dyed with reactive red 239 (AISE17 supplied by CFT), was cut into 6cm x 6cm pieces. If fraying of the fabric edges was to be avoided, plastic edging was applied to the squares of fabric with heat.

[0109] 4.3 g of the composition from each example was filled into a turgotometer pot, and water (hardness 2.67 mmol CaCO3 equivalent (15 gpg)) was added to form 1 L of washing solution. The following fabric samples were added to each turgotometer pot. - Three samples of Reactive Red 239 -5g black cotton ballast -3g black polyester ballast -Until the total fabric load reaches 45g, add other colored 6x6cm samples.

[0110] The turgotometer pot was heated to 60°C and agitated at 300 rpm for 40 minutes. After washing, the test fabric and ballast were rotated at 1000 rpm for 2 minutes, then rinsed twice for 5 minutes in water at 20°C with a hardness of 2.67 mmol CaCO3 equivalent (15 gpg), with a 2-minute rotation at 1000 rpm after each rinse. In the final step, the fabric was tumble-dried. The washing cycle was repeated a total of 5 times.

[0111] The test samples were analyzed for color change relative to an unwashed reference fabric using a spectrophotometer (Konika Minolta CM-3610A), and the color change was measured on the ΔE CMC scale. The results are shown in Table 4 below.

[0112] Each pot contained three pieces of the test cloth (three internal replicas). Each composition was added to two different pots (two external replicas), and the ΔE CMC readings were averaged for each treatment.

[0113] [Table 5] * Significance calculated for Example A via Anova HSD with alpha = 0.05

[0114] As can be seen from the data above, washing with the composition of the present invention (Example 1) resulted in less dye fading than with comparative compositions containing a cationic polymer and a linear nonionic surfactant (Example B), or those not containing a cationic polymer and a nonionic surfactant.

[0115] [Table 6] 8 Poly(diallyldimethylammonium chloride / acrylamide), Merquat 740, molecular weight 100,000 Da, supplied by Lubrizol.

[0116] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise indicated, each such dimension is intended to mean both the listed value and the functionally equivalent range encompassing that value. For example, a dimension disclosed as "40 mm" is intended to mean "approximately 40 mm."

Claims

1. A laundry detergent composition comprising a surfactant and a cationic polymer, The surfactant system includes a branched-chain nonionic surfactant, The cationic polymer is selected from poly(diallyldimethylammonium chloride), copolymer of diallyldimethylammonium chloride and acrylic acid, copolymer of acrylamide and methacrylamidopropyltrimethylammonium chloride, copolymer of acrylamide and diallyldimethylammonium chloride, copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid, copolymer of acrylamide, methacrylamidopropyltrimethylammonium chloride and acrylic acid, copolymer of acrylamide, diallyldimethylammonium chloride and acrylic acid, copolymer of acrylamide and N,N,N-trimethylaminoethyl acrylate, copolymer of diallyldimethylammonium chloride and vinyl alcohol, and mixtures thereof. The cationic polymer has a molecular weight of 1,000 Da to 1,250,000 Da. The aforementioned branched-chain nonionic surfactant is a) Formula I: R1-CH(R2)-O-(PO) ｘ (EO) ｙ (PO) ｚ -H In formula I, R1 is a C4-C14 alkyl chain, preferably a C4-C8 alkyl chain, more preferably a C6 alkyl chain. R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain. x is 0 to 10, preferably 0 to 5, more preferably 0 to 3. y is 5 to 20, preferably 6 to 15, more preferably 7 to 12. z is 0 to 20, preferably 0 to 5, more preferably 0 to 3. EO represents ethoxylation, and PO represents propoxylation. b) Formula II: R1-CH(R2)CH ２ -O-(PO) ｘ (EO) ｙ (PO) ｚ -H In formula II, R1 is a C3-C13 alkyl chain, preferably a C3-C7 alkyl chain, more preferably a C5 alkyl chain. R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain. x is 0 to 10, preferably 0 to 5, more preferably 0 to 3. y is 5 to 20, preferably 6 to 15, more preferably 7 to 12. z is 0 to 20, preferably 0 to 5, more preferably 0 to 3. EO represents ethoxylation, and PO represents propoxylation. c) and mixtures thereof, A laundry detergent composition selected from the following.

2. The laundry detergent composition according to claim 1, wherein the surfactant system contains the branched-chain nonionic surfactant at a concentration of 0.1% to 12% by weight, preferably 0.5% to 10% by weight, and more preferably 1% to 3% by weight of the composition.

3. The laundry detergent composition according to claim 1 or 2, wherein the laundry composition contains the surfactant system at a concentration of 1% to 70% by weight, preferably 10% to 50% by weight, and more preferably 15% to 35% by weight.

4. The laundry detergent composition according to any one of claims 1 to 3, wherein the surfactant system further comprises an anionic surfactant selected from the group consisting of anionic surfactants, preferably sulfonate surfactants, sulfate surfactants, and mixtures thereof, and more preferably the anionic surfactant comprises a sulfonate surfactant and a sulfate surfactant.

5. The laundry detergent composition according to claim 4, wherein the anionic surfactant comprises an alkyl sulfate surfactant, and the alkyl sulfate surfactant has an average ethoxylation degree of 0.5 to 8.0, preferably 1.0 to 5.0, and more preferably 2.0 to 3.

5.

6. The laundry detergent composition according to claim 4, wherein the anionic surfactant comprises an alkyl sulfate surfactant, the alkyl sulfate surfactant has an average degree of ethoxylation of less than 0.5, preferably the alkyl sulfate surfactant comprises a branched alkyl sulfate surfactant, and more preferably the branched alkyl sulfate surfactant comprises at least 20% by weight of a 2-branched alkyl chain of the alkyl chain of the branched alkyl sulfate surfactant.

7. The laundry detergent composition according to any one of claims 1 to 6, wherein the surfactant system comprises an amphoteric surfactant and / or a bipolar ionic surfactant, preferably an amphoteric surfactant selected from amine oxide surfactants, and more preferably the amine oxide surfactant is lauryldimethylamine oxide.

8. The laundry detergent composition according to any one of claims 1 to 7, wherein the cationic polymer is selected from the group consisting of poly(diallyldimethylammonium chloride), a copolymer of diallyldimethylammonium chloride and acrylic acid, a copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid, and mixtures thereof, and preferably selected from a copolymer of diallyldimethylammonium chloride and acrylic acid.

9. The laundry detergent composition according to any one of claims 1 to 8, wherein the diallyldimethylammonium chloride and co-acrylic acid monomer are present in a molar ratio of 50:50 to 90:10, preferably 55:45 to 85:15, and more preferably 60:40 to 70:

30.

10. The laundry detergent composition according to any one of claims 1 to 9, wherein the cationic polymer has a molecular weight of 100,000 Da to 1,000,000 Da, more preferably 250,000 Da to 750,000 Da.

11. The laundry detergent composition according to any one of claims 1 to 10, wherein the cationic polymer is present in the composition at a concentration of 0.1% to 10% by weight, preferably 0.5% to 5.0% by weight, and more preferably 1.0% to 2.5% by weight.

12. Use of a laundry detergent composition containing a branched-chain nonionic surfactant to protect the color of colored fabrics during washing, preferably to improve color retention.

13. The aforementioned branched-chain nonionic surfactant is a) Formula I: R1-CH(R2)-O-(PO) ｘ (EO) ｙ (PO) ｚ -H In formula I, R1 is a C4-C14 alkyl chain, preferably a C4-C8 alkyl chain, more preferably a C6 alkyl chain. R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain. x is 0 to 10, preferably 0 to 5, more preferably 0 to 3. y is 5 to 20, preferably 6 to 15, more preferably 7 to 12. z is 0 to 20, preferably 0 to 5, more preferably 0 to 3. EO represents ethoxylation, and PO represents propoxylation. b) Formula II: R1-CH(R2)CH ２ -O-(PO) ｘ (EO) ｙ (PO) ｚ -H R1 is a C3-C13 alkyl chain, preferably a C3-C7 alkyl chain, more preferably a C5 alkyl chain. R2 is a C1-C7 alkyl chain, preferably a C1-C5 alkyl chain, more preferably a C3 alkyl chain. x is 0 to 10, preferably 0 to 5, more preferably 0 to 3. y is 5 to 20, preferably 6 to 15, more preferably 7 to 12. z is 0 to 20, preferably 0 to 5, more preferably 0 to 3. EO represents ethoxylation, and PO represents propoxylation. The use according to claim 12, selected from the above.

14. The use according to claim 12 or 13, wherein the fabric dye is selected from the group consisting of reactive dyes, disperse dyes, and mixtures thereof, and preferably the fabric dye is selected from the group consisting of disperse dyes, reactive dyes, and mixtures thereof.

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