Laundry detergent compositions containing dye fixatives and linear alkylbenzene sulfonates

Abstract

The laundry detergent composition comprises a dye fixing agent, a nonionic surfactant system, and a C6-C 20 and an anionic surfactant system including a linear alkyl benzene sulfonate (LAS), wherein the weight ratio of the nonionic surfactant system to the anionic surfactant system is at least 1.5. A laundry detergent composition characterized by a weight ratio of the nonionic surfactant system to the anionic surfactant system of at least 1.5 can effectively protect the color of colored fabrics.

Description

[Technical Field]

[0001] The present invention relates to laundry detergent compositions containing a dye fixative and a linear alkylbenzene sulfonate. [Background technology]

[0002] As detergent products have evolved, consumer cleaning needs have been met. However, there are still some unmet consumer needs in the laundry industry. In particular, one unmet need is preventing color fading or bleeding of colored fabrics during the wash cycle.

[0003] Colored textiles, especially dark-colored textiles made of cotton or cotton blends, may fade over several wash cycles due to dye release from the textile. Meanwhile, color bleeding may occur; that is, when different-colored or white textiles are washed together with dyed textiles, the dye concentration in the wash liquor may be relatively high, resulting in the different-colored or white textiles being stained with the dye released from the dyed textiles. Color fading and color bleeding (also known as dye bleeding) rapidly deteriorate the appearance of colored textiles. Therefore, there is a continuing need for laundry detergent compositions that can prevent color fading and / or color bleeding.

[0004] Currently, so-called dye fixatives are used in detergent compositions to solve the problem of color fading or color bleeding. Such dye fixatives are typically cationic polymers that can bind negatively charged dyes on fabrics or in the wash liquor, preventing the dye from detaching from colored fabrics or redepositing on white fabrics or fabrics bearing a different dye. Unfortunately, however, these dye fixatives are very sensitive to the formulation of the detergent composition. In particular, the use of dye fixatives in cleaning liquid detergent compositions is practically limited to nonionic formulations, i.e., formulations that do not contain anionic surfactants, particularly linear alkylbenzene sulfonates. In formulations that contain anionic surfactants, particularly linear alkylbenzene sulfonates, the addition of such dye fixatives does not always provide any benefit in terms of color protection. On the other hand, anionic surfactants, particularly linear alkylbenzene sulfonates, are very important (and sometimes necessary) in detergent composition formulations due to their many advantages, such as low cost and excellent performance in terms of cleaning and foaming.

[0005] Previous studies have attempted to formulate liquid compositions containing anionic surfactants and dye fixing agents using ternary surfactant systems containing significant amounts of soap. In these studies, the ineffectiveness of the dye fixing agent in formulations containing anionic surfactants was attributed to a lack of compatibility between the anionic surfactant and the dye fixing agent, which resulted in aggregation, precipitation, or phase separation of the components. Therefore, this study focused solely on the stability of the liquid compositions. Specifically, this study only evaluated whether the liquid compositions were transparent or contained aggregation (or even opaque). However, this study did not test for color fading or color bleeding. In this case, although this study produced stable formulations (i.e., clear solutions), it remains unclear whether such stable formulations can prevent color fading or color bleeding. Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, there remains a need to provide laundry detergent compositions containing a dye fixative and an anionic surfactant, such as a linear alkylbenzene sulfonate, that can effectively prevent color fading or color bleeding. [Means for solving the problem]

[0007] The inventors have discovered that the instability of formulations containing dye fixing agents and linear alkylbenzene sulfonates is not the only reason why such formulations are ineffective in preventing fading or color bleeding, since many clear, stable solutions containing dye fixing agents and linear alkylbenzene sulfonates remain ineffective in preventing fading or color bleeding. Without being bound by any theory, it is believed that in such clear, stable solutions, there is still an interaction between the positive charge of the dye fixing agent and the negative charge of the anionic surfactant, and this interaction may block dye fixation, i.e., the binding of the positively charged dye fixing agent to the negatively charged dye on the colored textile.

[0008] A surprising discovery of the present invention is that in detergent formulations comprising a dye fixing agent, a nonionic surfactant system and an anionic surfactant system, the dye fixing agent can function when the weight ratio of the nonionic surfactant system to the anionic surfactant system is at least 1.5.

[0009] A further surprising discovery of the present invention is that in detergent formulations comprising a dye fixative, a nonionic surfactant system, and a linear alkyl benzene sulfonate, the dye fixative can provide anti-fading or anti-bleed benefits at relatively low levels. This is highly unexpected since most actives are dose dependent, i.e., the higher the level, the more active.

[0010] Accordingly, the present invention provides in one aspect a laundry detergent composition comprising: a) 0.01% to 10% by weight of the composition of a dye fixing agent, i) reaction products of polyamines with cyanamide and acids, such as organic and / or inorganic acids; ii) reaction products of cyanamide with an aldehyde and an ammonium salt; iii) reaction products of cyanamide with aldehydes and amines; iv) reaction products of amines with epichlorohydrin, and v) a dye fixing agent selected from the group consisting of any combination thereof; b) 0.1% to 50% by weight of the composition of a nonionic surfactant system; c) 0.1% by weight to 50% by weight of the composition, C6 to C 20 an anionic surfactant system including a linear alkylbenzene sulfonate (LAS); The laundry detergent composition has a weight ratio of the nonionic surfactant system to the anionic surfactant system of at least 1.5.

[0011] Preferably, the weight ratio of nonionic surfactant system to anionic surfactant system in a laundry detergent composition according to the present disclosure is from 1.5 to 20, preferably from 1.7 to 15, more preferably from 1.9 to 10, most preferably from 2 to 8, such as 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, 10 or any range therebetween.

[0012] In a particularly preferred embodiment of the present disclosure, the composition comprises: a) 0.15% to 0.9% by weight of the composition of a dye fixing agent, the dye fixing agent being selected from the group consisting of reaction products of dimethylamine and epichlorohydrin; b) 4% to 30% by weight of the composition of a nonionic surfactant system C having a weight average degree of ethoxylation in the range of 7 to 9 10 ~C 16 a nonionic surfactant system comprising an ethoxylated alcohol; c) 1% to 10% by weight of the composition of an anionic surfactant system, 10~C 16 LAS and C 10 ~C 16 Contains alkyl ethoxy sulfate, C 10 ~C 16 an anionic surfactant system, wherein the LAS is present in an amount ranging from 40% to 90% by weight of the anionic surfactant system; The liquid composition has a weight ratio of the nonionic surfactant system to the anionic surfactant system of 1.5 to 8.

[0013] In a particularly preferred embodiment of the present disclosure, the composition comprises: a) 1% to 5% by weight of the composition of a dye fixing agent selected from the group consisting of reaction products of dimethylamine and epichlorohydrin; b) 10% to 80% by weight of the composition of said nonionic surfactant system, C having a weight average degree of ethoxylation in the range of 7 to 9. 10 ~C 16 the nonionic surfactant system comprising an ethoxylated alcohol; c) 3% to 25% by weight of the composition of said anionic surfactant system, 10 ~C 16 LAS and C 10 ~C 16 Contains alkyl ethoxy sulfate, 10 ~C 16 an anionic surfactant system, wherein the LAS is present in an amount ranging from 40% to 90% by weight of the anionic surfactant system; The weight ratio of the dye fixing agent to the amine oxide is 0.2-1, and the weight ratio of the nonionic surfactant system to the anionic surfactant system is 2-8, in a unit dose composition.

[0014] The compositions according to the present disclosure may further comprise: d) from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, and most preferably from 0.3% to 2% by weight of the composition of an amphoteric surfactant, preferably an amine oxide, more preferably a C6-C8 20 Alkyl dimethyl amine oxide, most preferably C 10~C 20 and / or e) from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, and most preferably from 0.3% to 2% by weight of the composition of a fatty acid; and / or f) from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, and most preferably from 0.3% to 2% by weight of the composition of a surfactant-enhancing polymer, preferably a polyvinyl acetate-grafted polyethylene oxide copolymer.

[0015] In another aspect, the present invention relates to a method for protecting the color of colored fabrics, the method comprising contacting the colored fabrics with the laundry detergent composition described above. Preferably, the color protection is achieved by fixing dyes to the colored fabrics and / or preventing color fading or color bleeding from the colored fabrics.

[0016] In another aspect, the present invention relates to a method for preventing color fading or color bleeding of colored fabrics, the method comprising contacting colored fabrics with the laundry detergent composition described above.

[0017] In another aspect, the present invention relates to a method for fixing dye to colored fabrics, the method comprising contacting the colored fabrics with the laundry detergent composition described above.

[0018] An advantage of this laundry detergent composition is that it provides effective color protection to colored fabrics, including, for example, prevention of fading and / or color bleeding and dye fixation.

[0019] Another advantage of this laundry detergent composition is that the dye fixative functions well in detergent compositions containing LAS.

[0020] Another advantage of this laundry detergent composition is that it provides a balance of performance between colored fabrics having different colors (eg, red and blue). DETAILED DESCRIPTION OF THE INVENTION

[0021] definition As used herein, the articles "a" and "an," when used in a claim, are understood to mean one or more of what is claimed or described.

[0022] As used herein, the terms "comprise," "comprises," "comprising," "include," "includes," "including," and "contain," "contains," "containing" are intended to be open-ended, i.e., other steps and other ingredients can be added that do not affect the end result. The above terms encompass the terms "consisting of" and "consisting essentially of."

[0023] As used herein, when a composition is "substantially free" of a particular component, it means that the composition contains less than trace amounts of the particular component, alternatively less than 0.1%, alternatively less than 0.01%, alternatively less than 0.001% by weight of the composition.

[0024] As used herein, the term "laundry detergent composition" refers to a composition for cleaning soiled materials, including fabrics. Such compositions can be used as laundry pre-treatments, laundry post-treatments, or can be added during the rinse or wash cycle of a laundry operation. The laundry detergent composition may have a form selected from liquid, powder, unit dose, such as a single-compartment or multi-compartment unit dose, pouch, tablet, gel, paste, bar, or flake. Preferably, the laundry detergent composition is a liquid or unit dose composition. The term "liquid laundry detergent composition" herein refers to a composition in a form selected from the group consisting of pourable liquid, gel, cream, and combinations thereof. The liquid laundry detergent composition may be aqueous or non-aqueous, and may be anisotropic, isotropic, or a combination thereof. The term "unit dose laundry detergent composition" herein refers to a water-soluble pouch containing a measured amount of liquid enclosed in a water-soluble film.

[0025] As used herein, the term "primary surfactant" refers to a surfactant that is present in a composition in an amount greater than any other surfactant contained in such composition. Similarly, the term "primary anionic surfactant" refers to an anionic surfactant that is present in a composition in an amount greater than any other anionic surfactant contained in such composition.

[0026] As used herein, the term "majority surfactant" refers to a surfactant present in a composition in an amount that is at least 50% by weight of the total surfactant content in such composition. Similarly, the term "majority anionic surfactant" refers to an anionic surfactant present in a composition in an amount that is at least 50% by weight of the total anionic surfactant content in such composition.

[0027] As used herein, the term "alkyl" means a hydrocarbyl moiety that is branched or unbranched, substituted or unsubstituted. The term "alkyl" includes the alkyl portion of an acyl group.

[0028] As used herein, the term "washing liquor" refers to an aqueous solution in the amount typically used in one wash cycle, preferably 1 L to 50 L, or alternatively 1 L to 20 L for hand washing and 20 L to 50 L for machine washing.

[0029] As used herein, the term "soiled fabric" is used non-specifically and can refer to any type of natural or man-made fiber, including natural, man-made, and synthetic fibers, such as, but not limited to, cotton, linen, wool, polyester, nylon, silk, acrylic, and the like, as well as various blends and combinations.

[0030] dye fixative The dye fixing agent of the present invention is a cationic polymer. Without being bound by any theory, it is believed that such a positively charged dye fixing agent can bind a negatively charged dye through charge interaction, preventing the dye from leaving the fabric or redepositing onto a fabric of a different color. In particular, the dye fixing agent may be selected from the group consisting of: i) a reaction product of a polyamine with cyanamide and an organic acid and / or an inorganic acid; ii) a reaction product of cyanamide with an aldehyde and an ammonium salt; iii) a reaction product of cyanamide with an aldehyde and an amine; or iv) a reaction product of an amine with epichlorohydrin. Preferably, the dye fixing agent may be selected from the group consisting of a reaction product of an amine with epichlorohydrin, where the amine is a primary, secondary, or tertiary amine. More preferably, the dye fixing agent may be selected from the group consisting of a reaction product of dimethylamine with epichlorohydrin. Most preferably, the dye fixative may be poly(2-hydroxypropyldimethylammonium chloride), also known as poly(dimethylamine-co-epichlorohydrin), such as the polymer commercially available from Clariant under the trade name TEXCARE DFC 6.

[0031] The term "amine" includes monoamines and polyamines. Monoamines used herein can be primary, secondary, or tertiary amines. They can be aliphatic amines, such as dialkylamines, especially dimethylamine, cycloaliphatic amines, such as cyclohexylamine, and aromatic amines, such as aniline. However, amines used herein can also have aliphatic, cycloaliphatic, and aromatic substituents simultaneously. Furthermore, heterocyclic compounds, such as pyridine, can also be used. The term "polyamine" used herein includes, for example, diamines, triamines, tetraamines, and the like, as well as analogous N-alkylpolyamines and N,N-dialkylpolyamines. Examples are ethylenediamine, propylenediamine, butylenediamine, pentylenediamine, hexylenediamine, diethylenetriamine, triethylenetetraamine, and higher polyamines. Particularly preferred polyamines can be ethylenediamine, diethylenetriamine, and dimethylaminopropylamine. Ammonium salts are salts of ammonia, in particular ammonium chloride, or salts with inorganic or organic acids different from the abovementioned amines or polyamines, or quaternary ammonium salts.

[0032] Cyanamide can be cyanamide or dicyandiamide.The aldehyde used herein can include, for example, aliphatic aldehydes such as formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, etc.; dialdehydes such as glyoxal; unsaturated aldehydes such as acrolein, crotonaldehyde, and aromatic aldehydes such as benzaldehyde.Particularly preferred aldehydes can be aliphatic aldehydes such as formaldehyde.

[0033] The dye fixing agent used herein may also be a homopolymer or copolymer based on diallyldimethylammonium chloride (DADMAC). Copolymers based on DADMAC contain other vinyl monomers as additional components, such as vinylimidazole, vinylpyrrolidone, vinyl alcohol, vinyl acetate, (meth)acrylic acid / esters, acrylamide, styrene, styrene sulfonic acid, acrylamidomethylpropanesulfonic acid (AMPS), etc. Homopolymers based on DADMAC are available under the trade names Dodigen® 3954, Dodigen 4033, and Genamin PDAC (manufactured by Clariant).

[0034] Preferably, the dye fixing agent suitable for use in the present disclosure can be selected from the group consisting of reaction products of an amine with epichlorohydrin, where the amine is a primary, secondary, or tertiary amine. More preferably, the dye fixing agent suitable for use in the present disclosure can be selected from the group consisting of reaction products of dimethylamine with epichlorohydrin. Most preferably, the dye fixing agent can be poly(2-hydroxypropyldimethylammonium chloride).

[0035] In one embodiment, the dye fixing agent has formula (I):

[0036] [ka] (wherein n is an integer of 5 to 1000) is poly(2-hydroxypropyldimethylammonium chloride).

[0037] The dye fixative in the composition according to the present disclosure may be present in an amount of 0.02% to 2.5% by weight of the composition, preferably 0.05% to 2%, more preferably 0.1% to 1.5%, and most preferably 0.15% to 0.9%, for example 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%, 1.1%, 1.2%, 1.5%, 1.7%, 2.0%, 2.2%, 2.5% or any range therebetween.

[0038] Anionic surfactants The laundry detergent compositions of the present invention may comprise an anionic surfactant system, in particular from 0.1% to 50% by weight of the composition of an anionic surfactant system.

[0039] C6~C 20 Linear alkyl benzene sulfonate (LAS) surfactants are the anionic surfactants required for the laundry detergent compositions of the present invention. In one embodiment, the LAS is 10 ~C 16 LAS, preferably C 12 ~C 14 It is LAS.

[0040] LAS is typically prepared by sulfonation of alkylbenzenes (using SO2 or SO3) followed by neutralization. Suitable alkylbenzene feedstocks can be made from olefins, paraffins, or mixtures thereof using any suitable alkylation scheme, including sulfur- and HF-based processes. By varying the exact alkylation catalyst, the position of the covalent attachment of the benzene to the aliphatic hydrocarbon chain can be widely varied. Thus, the LAS herein can vary widely in 2-phenyl isomer and / or internal isomer content.

[0041] In some embodiments of the laundry detergent composition, C6 to C20 The LAS may be present in an amount of 10% to 100% by weight of the anionic surfactant system, preferably 20% to 99% by weight, more preferably 30% to 95% by weight, and most preferably 40% to 90% by weight, such as 50%, 60%, 70%, 80%, 90% by weight, or any range therebetween.

[0042] In some embodiments of laundry detergent compositions, the level of LAS is preferably higher than the level of any other anionic surfactant contained in such compositions, i.e., the LAS is the primary anionic surfactant in such compositions.

[0043] Anionic surfactants suitable for use in the present disclosure include C6-C 20 Alkyl sulfates (AS), C6-C 20 Alkyl alkoxy sulfates (AAS), C6-C 20 Methyl ester sulfonates (MES), C6-C 20 For example, the laundry detergent composition may further comprise alkyl ether carboxylates (AECs), C6-C8 alkyl ether carboxylates (C6-C8 alkyl ether carboxylates), or any combination thereof. 20 Alkyl alkoxy sulfate (AA x S) (wherein x is about 1 to 30, preferably about 1 to 15, more preferably about 1 to 10, and most preferably about 1 to 3). x The alkyl chain in S may be either linear or branched, and the mid-chain branched AA x S surfactants are particularly preferred. Preferred group AA x S is C where x is approximately 1 to 3. 12 ~C 14 The AA in the laundry detergent composition of the present invention includes alkyl alkoxy sulfates. xThe amount of S surfactant may range from about 0.05% to about 30% by weight of the composition, preferably from about 0.1% to about 20% by weight, more preferably from about 0.5% to about 15% by weight, and most preferably from about 1% to about 5% by weight.

[0044] In some embodiments, the AA of the LAS x The weight ratio to S is at least 0.6, preferably at least 0.8, more preferably at least 0.9, and most preferably at least 1, e.g., 0.6, 0.7, 0.8, 0.9, 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 8, 10, or any range therebetween.

[0045] The anionic surfactant system in the composition according to the present disclosure may be present in an amount of 0.1% to 45% by weight of the composition, preferably 0.5% to 40% by weight, more preferably 1% to 35% by weight, and most preferably 2% to 30% by weight, such as 2% by weight, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 15% by weight, 20% by weight, 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, 50% by weight, or any range therebetween.

[0046] In some embodiments of the present disclosure, the anionic surfactant system in a composition according to the present disclosure may comprise less than 30%, preferably less than 20%, more preferably less than 10%, and most preferably less than 5% soap, by weight of the anionic surfactant system.

[0047] Nonionic Surfactants (NI) The laundry detergent composition of the present invention may comprise a nonionic surfactant system. The nonionic surfactant system may comprise a nonionic surfactant selected from the group consisting of alkyl alkoxylated alcohols, alkyl alkoxylated phenols, alkyl polysaccharides, polyhydroxy fatty acid amides, alkoxylated fatty acid esters, sucrose esters, sorbitan esters, and alkoxylated derivatives of sorbitan esters, and any combination thereof. Preferably, the nonionic surfactant system comprises a C6-C alkoxylated sucrose ester having a weight average degree of alkoxylation ranging from 1 to 20, preferably from 5 to 15, and more preferably from 7 to 10. 20 More preferably, the nonionic surfactant system comprises a C8-C alkoxylated alcohol having a weight average degree of ethoxylation ranging from 1 to 20, preferably from 5 to 15, more preferably from 7 to 10. 18 Ethoxylated alcohols may also be included.

[0048] Non-limiting examples of non-ionic surfactants suitable for use herein include C 1000 series surfactants, such as Neodol® non-ionic surfactants available from Shell. 12 ~C 18 Alkyl ethoxylate; C6~C 12 Alkylphenol alkoxylates (where the alkoxylate units are a mixture of ethyleneoxy and propyleneoxy units); C with ethylene oxide / propylene oxide blocked alkyl polyamine ethoxylates, such as Pluronic® available from BASF 12 ~C 18 Alcohols and C6-C 12 Alkylphenol condensate; C 14 ~C 22 These surfactants include mid-chain branched alkyl alkoxylates (BAEx, where x is from about 1 to about 30); alkyl polysaccharides, specifically alkyl polyglycosides; polyhydroxy fatty acid amides, and ether-terminated poly(oxyalkylated) alcohol surfactants. Nonionic surfactants also include alkoxylated ester surfactants, such as those of the formula R 1 C(O)O(R2)nR 3 (In the formula, R1 is a straight chain and branched C6-C 22 selected from alkyl or alkylene moieties, R 2 is selected from C2H4 and C3H6 moieties, R 3 Also useful herein are alkoxylated ester surfactants having n selected from H, CH, C2H5, and C3H7 moieties, where n has a value of from about 1 to about 20. Such alkoxylated ester surfactants include fatty methyl ester ethoxylates (MEE), which are well known in the art.

[0049] In certain embodiments, the alkoxylated nonionic surfactants included in the laundry detergent compositions of the present invention are C6-C 20 Alkoxylated alcohols, preferably C8-C 18 Alkoxylated alcohols, more preferably C 10 ~C 16 Alkoxylated alcohols. C6-C 20 The alkoxylated alcohol is preferably an alkyl alkoxylated alcohol having an average degree of alkoxylation of from about 1 to about 50, preferably from about 3 to about 30, more preferably from about 5 to about 20, and even more preferably from about 5 to about 9. The alkoxylation herein may be ethoxylation, propoxylation, or a mixture thereof, but is preferably ethoxylation. In one embodiment, the alkoxylated nonionic surfactant is a C6-C 20 Ethoxylated alcohols, preferably C8 to C6 ethoxylated with an average of about 5 to about 20 moles of ethylene oxide 18 alcohol, more preferably C ethoxylated with an average of about 5 to about 9 moles of ethylene oxide 10 ~C 16 The most preferred alkoxylated nonionic surfactants are C ethoxylated with an average of about 7 or 9 moles of ethylene oxide. 12 ~C 14 Alcohol or C ethoxylated with an average of about 7 moles of ethylene oxide 12 ~C 15Alcohols such as Neodol® 25-7 available from Shell.

[0050] The nonionic surfactant system in compositions according to the present disclosure may be present in an amount of 1% to 45% by weight of the composition, preferably 2% to 40% by weight, more preferably 3% to 35% by weight, and most preferably 4% to 30% by weight, such as 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 20%, 25%, 30% by weight, or any range therebetween. In single unit dose applications, up to 80% of the high nonionic surfactant may be used.

[0051] In some embodiments, the weight ratio of nonionic surfactant system to anionic surfactant system is from 1.5 to 20, preferably from 1.7 to 15, more preferably from 1.9 to 10, and most preferably from 2 to 8, e.g., 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, and any range therebetween.

[0052] amphoteric surfactants Amphoteric surfactants suitable for use in the present invention include C6-C 20 The amine may be selected from the group consisting of alkyldimethyl amine oxides (AO) and combinations thereof.

[0053] Preferably, the amphoteric surfactant is characterized by the following structure:

[0054] [ka] (In the formula, R 1 is C 6~20 Alkyl, C 6~20 Hydroxyalkyl, or C 6~20 alkylphenyl group, and each R 2 is C 2~5 Alkylene, or C 2~5hydroxyalkylene group, x is 0 to about 3, and each R 3 is C 1~3 Alkyl, C 1~3 hydroxyalkyl, or polyethylene oxide containing from about 1 to about 3 ethoxylene (EO) units. Preferably, the amphoteric surfactant is C 8~18 Alkyl dimethyl amine oxide, preferably C 10~16 It may also be an alkyldimethylamine oxide.

[0055] Preferably, the amphoteric surfactant is selected from the group consisting of dodecyldimethylamine oxide, tetradecyldimethylamine oxide, and combinations thereof. More preferably, the amphoteric surfactant comprises dodecyldimethylamine oxide having the following formula (III):

[0056] [ka]

[0057] Such a compound is also known as lauryldimethylamine oxide or dodecydimethylamine-N-oxide (DDAO), which is commercially available from Huntsman under the trade name Oxamin® LO.

[0058] The amphoteric surfactant (e.g., amine oxide) in the composition according to the present disclosure may be present in an amount of 0.01% to 10% by weight of the composition, preferably 0.1% to 5% by weight, more preferably 0.2% to 3% by weight, and most preferably 0.3% to 2% by weight, for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5% by weight, or any range therebetween.

[0059] The laundry detergent compositions of the present invention may further comprise another amphoteric surfactant (i.e., other than AO). Non-limiting examples of other amphoteric surfactants include derivatives of secondary and tertiary amines, derivatives of heterocyclic secondary and tertiary amines, or derivatives of quaternary ammonium, quaternary phosphonium, or tertiary sulfonium compounds. Preferred examples include alkyl dimethyl betaines and coco dimethylamidopropyl betaines, sulfo and hydroxy betaines (where the alkyl group is C8 to C9). 18 or C 10 ~C 14 and betaines, including N-alkyl-N,N-dimethylamino-1-propanesulfonates, which may be

[0060] Other ingredients Laundry detergent compositions according to the present disclosure may further comprise from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, and most preferably from 0.3% to 2%, by weight of the composition of a surfactant enhancing polymer, preferably a polyvinyl acetate grafted polyethylene oxide copolymer.

[0061] The laundry detergent composition of the present invention may further comprise a cationic surfactant, non-limiting examples of which include quaternary ammonium surfactants, which may have up to 26 carbon atoms, alkoxylate quaternary ammonium (AQA) surfactants, dimethylhydroxyethyl quaternary ammonium, dimethylhydroxyethyl lauryl ammonium chloride, polyamine cationic surfactants, and amine surfactants (e.g., amidopropyldimethyl amine (APA)).

[0062] The laundry detergent compositions described herein may contain adjunct ingredients. Suitable adjunct materials include, but are not limited to, builders, chelating agents, rheology modifiers, dye transfer inhibitors, dispersants, enzymes and enzyme stabilizers, catalytic materials, bleach activators, hydrogen peroxide, hydrogen peroxide sources, preformed peracids, polymeric dispersants, clay soil removal / anti-redeposition agents, brighteners, suds suppressors, dyes, photobleaching agents, perfumes, perfume microcapsules, structural elastomers, fabric softeners, carriers, hydrotropes, processing aids, solvents, hueing agents, structurants, and / or pigments. The exact nature of these adjunct ingredients and their levels in the laundry detergent compositions will depend on the physical form of the composition and the nature of the laundry operation in which the composition is used.

[0063] In some embodiments, laundry detergent compositions according to the present disclosure may further comprise from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, and most preferably from 0.3% to 2%, by weight of the composition, of a fatty acid.

[0064] Preparation of the Composition The laundry detergent compositions of the present invention are generally prepared by conventional methods as known in the art of preparing laundry detergent compositions. Such methods typically involve mixing the essential and optional ingredients in any desired order to a relatively homogeneous state, with or without heating, cooling, application of vacuum, etc., thereby providing a laundry detergent composition containing the ingredients in the required concentrations.

[0065] How to use Another aspect of the present invention relates to a method for treating fabrics with a laundry detergent composition. Such a method can provide color protection benefits. The method includes dispensing 5 g to 120 g of the above-described laundry detergent composition into a washing tub containing water to form a wash liquor. The volume of wash liquor in the washing tub herein is preferably 1 L to 50 L, or 1 L to 20 L for hand washing and 20 L to 50 L for machine washing. The temperature of the laundry wash liquor is preferably in the range of 5°C to 60°C.

[0066] The dosage amounts in the methods herein may vary depending on the type of wash. In one embodiment, the method comprises administering about 5 g to about 60 g of the laundry detergent composition to a hand-washing washing machine (e.g., about 2-4 L). In an alternative embodiment, the method comprises administering about 5 g to about 100 g, preferably about 10 g to about 65 g, of the laundry detergent composition to a washing machine (e.g., about 30-45 L).

[0067] Test Method Test 1: Dye bleeding test The dye bleeding test is carried out using a Tergotometer (Model: RHLQ1V, manufactured by Research Institute of Daily Chemical Industry (RIDCI)) as follows. 1) Cut approximately 1.0 g of test fabric (ASIE-130 or ASIE-133) for each tube of the tergotometer. 2) Water hardness level (Ca) of approximately 9 gpg heated to 40°C in a water bath 2+ vs. Mg 2+ Add 1 L of reverse osmosis (RO) water having a weight ratio of about 4:1. 3) Dissolve about 2.0 grams of the sample liquid detergent composition to form a wash liquor having a detergent dosage of about 2000 ppm. 4) Adjust the pH of the solution to about 8.5. 5) Take out approximately 30 mL of the solution and rinse with L * / a * / b * is measured (measured with an UltraScan VIS (manufactured by HunterLab, Virginia, USA) using a 5 cm x 1 cm sample cell). 6) Place one 1.0g piece of test fabric into each tube and wash for approximately 20 minutes. 7) Take out approximately 30 mL of the solution and lyse it under the same conditions as in step 5) * / a * Measure / b. 8) Calculate ΔE based on the pre-wash and post-wash measurements. A higher ΔE indicates more severe dye bleed. [Example]

[0068] Example 1: Effective Color Protection Achieved by Laundry Detergent Compositions Containing Dye Fixatives, Nonionic (NI) Surfactants, and Anionic (AI) Surfactants with High NI to AI Ratios Six sample liquid laundry detergent compositions were prepared containing the following ingredients: Samples 1 and 2 did not contain any dye fixing agent, and Samples 3-6 contained the same level of dye fixing agent (i.e., poly(2-hydroxypropyldimethylammonium chloride)) but with different ratios of NI to AI. All samples were stable and clear (i.e., no flocculation or sedimentation).

[0069] [Table 1] 1 Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6.

[0070] The ΔE of these samples was measured as a measure of dye bleed according to Test 1: Dye Bleed Test above using fabrics colored with blue dye (ASIE-133) or direct red dye (ASIE-130), respectively. A higher ΔE indicates more severe dye bleed, while a lower ΔE indicates better color protection.

[0071] Red fabric The results for red-colored fabric are shown in the table below, where the colored fabric exhibits dye bleed after washing with Samples 1 and 2, which do not contain a dye fixing agent (i.e., ΔE of 0.79 and 0.81), and the colored fabric also exhibits dye bleed after washing with Samples 3 and 4, which contain a dye fixing agent and a medium-low ratio (i.e., 1:2 and 1:1) of NI / AI (i.e., ΔE of 0.89 and 0.87). These results are consistent with previous studies that taught that dye fixing agents cannot function in formulations containing AI, particularly LAS.

[0072] Surprisingly, the inventors discovered that when the ratio of NI to AI in the formulation containing the dye fixative is relatively high (e.g., 2:1 or greater in Samples 5 and 6), the dye fixative can provide effective color protection (e.g., 0.77 in Sample 5 and 0.64 in Sample 6).

[0073] [Table 2]

[0074] Blue fabric Another test was performed using fabric colored with a blue dye (ASIE-133) using Test 1: Dye Bleed Test described above. The results are shown in the table below, where the color protection achieved by dye fixatives with a high NI to AI ratio is also observed (0.63 for Sample 5 and 1.19 for Sample 1). This is even more pronounced compared to that shown with the red fabric.

[0075] [Table 3]

[0076] Example 2: Effective color protection achieved by laundry detergent compositions containing low doses of dye fixatives in the presence of anionic (AI) surfactants Six additional sample liquid laundry detergent compositions were also prepared containing the following ingredients: Samples 7 and 9 were controls containing no dye fixing agent; Sample 8 contained a dye fixing agent but no LAS; Samples 10-12 contained a dye fixing agent and LAS, with Sample 10 containing a high level of dye fixing agent and Samples 11 and 12 containing low levels of dye fixing agent.

[0077] [Table 4] 1 Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6.

[0078] The ΔE of these samples was measured as a measure of dye bleed according to Test 1: Dye Bleed Test above using fabrics colored with blue dye (ASIE-133) or direct red dye (ASIE-130), respectively. A higher ΔE indicates more severe dye bleed, while a lower ΔE indicates better color protection.

[0079] Blue fabric The results for the blue fabric show that in formulations without LAS, high levels of dye fixative added provide significant color protection (0.41 for Sample 8 and 1.30 for Sample 7). However, when LAS was present, high levels of dye fixative added did not provide color protection and worsened dye bleed (2.17 for Sample 10 and 1.18 for Sample 9). Unexpectedly, we discovered that relatively low levels of dye fixative added can provide effective color protection in formulations with LAS (0.69 for Sample 11 and 1.18 for Sample 9).

[0080] [Table 5]

[0081] Red fabric Further tests were performed using fabrics colored with Direct Red dye (ASIE-130) using Test 1: Dye Bleed Test described above. The results are shown in the table below, where the color protection achieved by adding dye fixative at relatively low rates is also observed (0.74 for Sample 12 and 0.79 for Sample 9).

[0082] [Table 6]

[0083] Example 3: Exemplary Formulations of Liquid Laundry Detergent Compositions Containing Dye Fixatives The following liquid laundry detergent compositions shown in Table 7 are prepared to contain the listed ingredients in the listed proportions (by weight %).

[0084] [Table 7] 1 Dye fixative: Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6

[0085] [Table 8] 1 Dye fixative: Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6

[0086] Example 4: Exemplary Formulations of Unit Dose Laundry Detergent Compositions Containing Dye Fixatives and Amine Oxides The exemplary formulations shown in Table 8 are made for unit dose laundry detergents. These compositions are encapsulated into unit dose compartments by using a polyvinyl alcohol-based film.

[0087] [Table 9] 1 Dye fixative: Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6

[0088] [Table 10] 1 Dye fixative: Poly(2-hydroxypropyldimethylammonium chloride) commercially available from Clariant under the trade name TEXCARE DFC 6

[0089] Dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

[0090] All documents cited herein, including any cross-referenced or related patents or patent applications, and any patent applications or patents to which this application claims priority or benefit, are incorporated herein by reference in their entirety, unless expressly stated to the contrary. The citation of any document shall not be deemed to be prior art to any invention disclosed or claimed herein, or to teach, suggest, or disclose such invention, either alone or in combination with any other reference(s). Furthermore, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

[0091] While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. 1. A laundry detergent composition comprising: a) 0.1% to 10%, by weight of the composition, of a dye fixing agent which is poly(2-hydroxypropyldimethylammonium chloride); b) 5% to 50% by weight of the composition of a nonionic surfactant system; c) 2% to 50% by weight of the composition, ６ ~C ２０ an anionic surfactant system comprising a linear alkyl benzene sulfonate (LAS); the C6-C20 LAS is present in an amount ranging from 30% to 100% by weight of said anionic surfactant system; A laundry detergent composition wherein the weight ratio of said nonionic surfactant system to said anionic surfactant system is at least 1.

9.

2. 2. The laundry detergent composition of claim 1, wherein the weight ratio of said nonionic surfactant system to said anionic surfactant system is from 1.9 to 8.

3. 2. The laundry detergent composition of claim 1, wherein the weight ratio of said nonionic surfactant system to said anionic surfactant system is from 2 to 4.

4. A laundry detergent composition according to any preceding claim, wherein the dye fixing agent is present in an amount ranging from 0.1% to 2.5% by weight of the composition.

5. A laundry detergent composition according to any preceding claim, wherein the nonionic surfactant system is present in an amount ranging from 5% to 45% by weight of the composition.

6. A laundry detergent composition according to any preceding claim, wherein the anionic surfactant system is present in an amount ranging from 3% to 45% by weight of the composition.

7. C ６ ~C ２０ A laundry detergent composition according to any preceding claim, wherein LAS is present in an amount in the range of from 40% to 100% by weight of the anionic surfactant system.

8. 8. A laundry detergent composition according to any preceding claim, wherein the anionic surfactant system comprises less than 30% soap, by weight of the anionic surfactant system.

9. A laundry detergent composition according to any preceding claim, wherein the composition is a liquid composition or a unit dose composition.

10. The composition comprises: a) 0.15% to 0.9%, by weight of the composition, of a dye fixative which is poly(2-hydroxypropyldimethylammonium chloride); b) from 5% to 15% by weight of the composition of a nonionic surfactant system having a weight average degree of ethoxylation in the range of 7 to 9; １０ ~C １６ the nonionic surfactant system comprising an ethoxylated alcohol; c) 3% to 10% by weight of the composition of an anionic surfactant system, １０ ~C １６ LAS and C １０ ~C １６ alkyl ethoxy sulfate, １０ ~C １６ and an anionic surfactant system, wherein LAS is present in an amount ranging from 40% to 90% by weight of the anionic surfactant system; 10. The laundry detergent composition of claim 9, wherein the weight ratio of said nonionic surfactant system to said anionic surfactant system is from 2 to 8.

11. The composition comprises: a) 0.5% to 3%, by weight of the composition, of a dye fixing agent which is poly(2-hydroxypropyldimethylammonium chloride); b) 10% to 80% by weight of the composition of a nonionic surfactant system, C having a weight average degree of ethoxylation in the range of 7 to 9 １０ ~C １６ the nonionic surfactant system comprising an ethoxylated alcohol; c) 3% to 25% by weight of the composition of an anionic surfactant system, １０ ~C １６ LAS and C １０ ~C １６ alkyl ethoxy sulfate, １０ ~C １６ and an anionic surfactant system, wherein LAS is present in an amount ranging from 40% to 90% by weight of said anionic surfactant system; 10. The laundry detergent composition of claim 9, wherein the weight ratio of the dye fixing agent to the amine oxide is from 0.2 to 1, and the weight ratio of the nonionic surfactant system to the anionic surfactant system is from 2 to 8.

12. The composition comprises: d) 0.01% to 10% by weight of the composition of an amphoteric surfactant, and / or e) 0.01% to 10% by weight of the composition of a fatty acid, and / or 12. A laundry detergent composition according to any preceding claim, further comprising f) from 0.01% to 10% by weight of the composition of a surfactant-enhancing polymer.

13. A method for protecting the color of colored fabrics, comprising contacting the colored fabrics with the laundry detergent composition of any one of claims 1 to 12.

14. 14. The method of claim 13, wherein the color protection is achieved by fixing dye to the colored fabric and / or preventing color fading or color bleeding from the colored fabric.

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