Embrittlement inhibitor composition for fibers and cleaning method using same

Abstract

An object of the present invention is to provide an embrittlement inhibitor composition for fibers capable of inhibiting embrittlement of a textile product even under a washing condition with a large load on the textile product when washing the textile product, and a washing method using the embrittlement inhibitor composition for fibers.SOLUTION: An embrittlement suppressing agent composition for fibers, which is used by being mixed in a washing bath for washing fiber products, wherein the embrittlement suppressing agent composition for fibers contains an embrittlement suppressing compound, and the embrittlement suppressing compound contains at least one selected from the group consisting of a specific sulfosuccinic acid ester compound, a specific phosphoric ester compound or a phosphoric acid salt thereof, and a poly (meth) acrylamido compound having a colloid equivalent value of - 13 to 13meq / g.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a composition that has an excellent effect of suppressing embrittlement of textile products during washing. [Background technology]

[0002] When washing textile products, problems arise such as fiber damage and embrittlement of the textile products, such as the shedding of fiber fragments from the textile products. In particular, in commercial laundries such as those in the linen supply industry, embrittlement problems frequently occur when washing textile products that are contaminated with a combination of sebum stains, protein stains, particle stains, etc., such as sheets, yukata robes, towels, tablecloths, and napkins used in hotels, inns, restaurants, and hot spring facilities. In the above-mentioned cleaning methods, in order to remove stubborn stains or to improve hygiene, washing is carried out at high temperatures and in combination with surfactants (liquid detergents or powder detergents), alkalis, bleaches, etc., which creates significant chemical effects from surfactants (liquid detergents or powder detergents), alkalis, bleaches, etc., as well as significant physical effects from heat, agitation, rotation, dropping, vibration, etc., and these are washing conditions that place a great strain on textile products, making them prone to becoming embrittled. Preventing these textile products from becoming brittle during washing will extend their lifespan, reduce replacement costs for textile products, and contribute to the SDGs (Sustainable Development Goals) by promoting waste reduction.

[0003] Furthermore, when textile products containing synthetic fibers are washed, fragments of synthetic fibers that fall off from the textile products during washing end up in the sea together with the washing wastewater, raising concerns that this could exacerbate environmental problems such as marine pollution caused by synthetic fiber fragments. Therefore, there is a need for a method for suppressing the generation and shedding of fiber fragments from textile products during washing, not only from the viewpoint of reducing the replacement costs of textile products but also from the viewpoint of environmental issues. Patent Document 1 discloses a physical means for collecting synthetic fiber fragments that fall off from textile products during the washing process. However, it only recovers the fallen synthetic fiber fragments, and does not achieve the prevention of embrittlement of the textile product itself or the prevention of the falling off of synthetic fiber fragments from the textile product. Furthermore, because the textile product is washed in a laundry bag, the method is insufficient in cleaning stubborn stains. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Table 2019-505351 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a fiber embrittlement inhibitor composition that can inhibit embrittlement of textile products when washing them, even under washing conditions that place a heavy burden on the textile products, and a washing method using the fiber embrittlement inhibitor composition. Furthermore, by using the fiber embrittlement inhibitor composition of the present invention, it is possible to suppress embrittlement of textile products, including damage to fibers and the generation and shedding of fiber fragments, caused by chemical and physical actions during washing, and to suppress the outflow of synthetic fiber fragments into the ocean when textile products containing synthetic fibers are washed, thereby providing an improvement measure for environmental problems such as marine pollution. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that an embrittlement inhibitor composition containing at least one compound selected from the group consisting of a polyacrylamide compound, a sulfosuccinic acid compound, and a phosphate ester compound can solve the above-mentioned problems. That is, the present invention is characterized by the following points. [1] A fiber embrittlement inhibitor composition to be mixed into a washing bath for washing textile products, The fiber embrittlement suppressant composition contains an embrittlement suppression compound, The embrittlement suppression compound is a fiber embrittlement suppression composition characterized by containing at least one compound selected from the group consisting of a sulfosuccinate compound represented by formula (1), a phosphate compound represented by formula (2) or a phosphate salt thereof, and a poly(meth)acrylamide compound having a colloid equivalent value of -13 to 13 meq / g. [ka] (In the formula, R 1 and R 2 are each independently a monovalent hydrocarbon group having 1 to 22 carbon atoms, and M + is a hydrogen cation, an alkali metal cation, or an organic ammonium cation. [ka] (In the formula, A 1 O, A 2 O and A 3 O are each independently an alkyleneoxy group having 2 to 4 carbon atoms, and R 3 is a hydrocarbon group having 4 to 22 carbon atoms, and R 4 and R 5 are each independently a hydrogen atom or a hydrocarbon group having 4 to 22 carbon atoms; a, b, and c are each a repeating unit A 1 O, A 2 O, A 3 represents the average number of repeats of O, and each is independently a number from 0 to 20.) [2] The embrittlement suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes an anionic poly(meth)acrylamide compound, The anionic poly(meth)acrylamide compound has a colloid equivalent value of -13 to -1 meq / g and a weight average molecular weight of 1,000,000 to 25,000,000. The fiber embrittlement inhibitor composition according to [1] above. [3] The embrittlement suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes a cationic poly(meth)acrylamide compound, The cationic poly(meth)acrylamide compound has a colloid equivalent value of 0.1 to 13 meq / g and a weight average molecular weight of 100,000 to 20,000,000. The fiber embrittlement inhibitor composition according to [1] above. [4] The embrittlement suppressing compound contains the poly(meth)acrylamide compound, The poly(meth)acrylamide compound includes a nonionic poly(meth)acrylamide compound, The nonionic poly(meth)acrylamide compound has a colloid equivalent value of -0.9 to 0 meq / g and a weight average molecular weight of 1,000,000 to 25,000,000. The fiber embrittlement inhibitor composition according to [1] above. [5] The embrittlement suppressing compound contains the poly(meth)acrylamide compound, The poly(meth)acrylamide compound includes an amphoteric poly(meth)acrylamide compound, The amphoteric poly(meth)acrylamide compound has a colloid equivalent value of -13 to 0 meq / g and 1 to 13 meq / g, and the weight average molecular weight is 100,000 to 20,000,000; The fiber embrittlement inhibitor composition according to [1] above. [6] The embrittlement suppressing compound includes the sulfosuccinate ester compound, The sulfosuccinate compound includes at least one selected from the group consisting of sulfosuccinate diesters and sulfonates thereof. The fiber embrittlement inhibitor composition according to [1] above. [7] The embrittlement suppression compound contains the phosphate ester compound or its phosphate, The phosphate ester compound or its phosphate salt includes at least one selected from the group consisting of monoalkyl phosphates, polyoxyalkylene monoalkyl ether phosphates, dialkyl phosphates, and polyoxyalkylene dialkyl ether phosphates, and phosphate salts thereof. The fiber embrittlement inhibitor composition according to [1] above. [8] A method for washing textile products, using a washing bath containing the fiber embrittlement inhibitor composition described in [1] above. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a fiber embrittlement inhibitor composition that can inhibit embrittlement of textile products when washing them, even under washing conditions that are stressful to the textile products, and a washing method using the fiber embrittlement inhibitor composition. In particular, it exhibits an excellent effect of inhibiting embrittlement of textile products under washing conditions such as commercial laundry, which place a heavy burden on textile products due to chemical and physical actions. Furthermore, by using the fiber embrittlement inhibitor composition of the present invention, it is possible to suppress embrittlement of textile products, including damage to fibers and the generation and shedding of fiber fragments, etc., which are caused by chemical and physical actions during washing, and to suppress the outflow of synthetic fiber fragments into the ocean when textile products containing synthetic fibers are washed, thereby providing a solution to environmental problems such as marine pollution. DETAILED DESCRIPTION OF THE INVENTION

[0008] The following describes in detail the embodiments of the present invention. The following description of the components is an example of an embodiment of the present invention, and the present invention is not limited to these details as long as it does not deviate from the gist of the present invention.

[0009] <<Fiber Embrittlement Inhibitor Composition>> The fiber embrittlement suppressant composition of the present invention is a composition containing at least one embrittlement suppression compound, and is used by being mixed into a washing bath for washing textile products. By including the fiber embrittlement inhibitor composition of the present invention in a cleaning bath, friction between fibers of the textile product being cleaned during cleaning can be reduced, and embrittlement of the textile product, including damage to the fibers and the generation and shedding of fiber fragments, can be suppressed.

[0010] <Other ingredients> The embrittlement inhibitor composition of the present invention may contain, as necessary, water, fatty acids, fatty acid salts, chelating agents, stabilizers, surfactants, water-miscible organic solvents, thickeners, viscosity reducers, solubilizers, alkali agents, antioxidants, preservatives, enzymes, fragrances, colorants, emulsifiers, natural products, pH adjusters, antifoaming agents, storage stability improvers, fluorescent agents, dye transfer inhibitors, anti-soiling agents, pearlescent agents, and the like, within limits that do not impair the embrittlement inhibitor composition's effect of inhibiting embrittlement. The water is not particularly limited, but examples thereof include tap water, well water, ion-exchanged water, distilled water, ultrapure water, and purified water.

[0011] <Embrittlement inhibiting compound> The embrittlement-inhibiting compound can reduce the friction between the fibers of the textile product being washed during washing. The embrittlement-suppressing compound contained in the fiber embrittlement-suppressing agent composition of the present invention preferably contains at least one selected from the group consisting of a sulfosuccinate ester compound represented by the following formula (1), a phosphate ester compound represented by the following formula (2) or a phosphate salt thereof, and a poly(meth)acrylamide compound having a colloid equivalent value of -13 to 13 meq / g, more preferably a poly(meth)acrylamide compound and / or a sulfosuccinate ester compound having a colloid equivalent value of -13 to 13 meq / g, and even more preferably a poly(meth)acrylamide compound having a colloid equivalent value of -13 to 13 meq / g.

[0012] [ka] (In the formula, R 1 and R 2 are each independently a monovalent hydrocarbon group having 1 to 22 carbon atoms, and M + is preferably a hydrogen cation, an alkali metal cation, or an organic ammonium cation.

[0013] [ka] (In the formula, A 1 O, A 2O and A 3 O are each independently an alkyleneoxy group having 2 to 4 carbon atoms, and R 3 is a hydrocarbon group having 4 to 22 carbon atoms, and R 4 and R 5 are each independently a hydrogen atom or a hydrocarbon group having 4 to 22 carbon atoms; a, b, and c are each a repeating unit A 1 O, A 2 O, A 3 represents the average number of repeats of O, and each is independently a number from 0 to 20.)

[0014] The content of the embrittlement-suppressing compound in the fiber embrittlement-suppressing composition of the present invention is preferably 0.0001 to 100 mass%, more preferably 0.1 to 100 mass%, even more preferably 0.5 to 100 mass%, and particularly preferably 30 to 100 mass%. Outside the above range, the embrittlement-suppressing properties and handleability tend to deteriorate.

[0015] [Sulfosuccinate compounds] The sulfosuccinate compound in the present invention is a compound represented by the above general formula (1). Specific examples of organic ammonium cations that form sulfonate salts include alkanolammonium cations and quaternary ammonium cations.

[0016] To obtain better embrittlement suppression, R 1 and R 2 and are each independently one or more of a linear alkyl group, a linear alkenyl group, a branched alkyl group, and a branched alkenyl group having 4 to 22 carbon atoms.

[0017] To obtain even better embrittlement suppression, R 1 and R 2 and each independently represent at least one of a linear alkyl group, a linear alkenyl group, a branched alkyl group, and a branched alkenyl group having 6 to 20 carbon atoms.

[0018] In order to obtain particularly excellent embrittlement suppression, R 1 and R 2 are each independently one or more of a linear alkyl group, a linear alkenyl group, a branched alkyl group, and a branched alkenyl group having 8 to 18 carbon atoms.

[0019] In terms of availability, M + The cation is preferably an alkali metal cation or an organic ammonium cation such as an alkanolammonium cation or a quaternary ammonium cation, and more preferably an alkali metal cation. As the alkali metal cation, sodium cation and potassium cation are preferred.

[0020] Examples of the compound represented by general formula (1) include sulfosuccinic acid diesters and sulfonates thereof. Specific examples include sulfosuccinic acid di-2-ethylhexyl ester, sodium sulfosuccinic acid di-2-ethylhexyl ester, dioleyl sulfosuccinic acid, sodium dioleyl sulfosuccinic acid, diisodecyl sulfosuccinic acid, sodium diisodecyl sulfosuccinic acid, and sulfonates thereof.

[0021] [Phosphate ester compounds] The phosphate ester compound in the present invention is a compound represented by the above general formula (2). -(A 1 O) a -,-(A 2 O) b -, and -(A 3 O) c -A in 1 O, A 2 O and A 3 The order of the Os may be random or block-like.

[0022] To obtain better embrittlement suppression, R 3 is more preferably a hydrocarbon group having 4 to 22 carbon atoms, and R 4is more preferably a hydrogen atom, and R 5 is more preferably a hydrogen atom or a hydrocarbon group having 4 to 22 carbon atoms.

[0023] To obtain even better embrittlement suppression, R 3 is more preferably an alkyl group or alkenyl group having 8 to 20 carbon atoms, and R 4 is more preferably a hydrogen atom, and R 5 is more preferably at least one of a hydrogen atom, an alkyl group having 8 to 20 carbon atoms, and an alkenyl group having 8 to 20 carbon atoms.

[0024] In order to obtain particularly excellent embrittlement suppression, R 3 is particularly preferably an alkyl group having 12 to 18 carbon atoms or an alkenyl group having 12 to 18 carbon atoms, and R 4 is particularly preferably a hydrogen atom, and R 5 is particularly preferably at least one of a hydrogen atom, an alkyl group having 12 to 18 carbon atoms, and an alkenyl group having 12 to 18 carbon atoms.

[0025] To obtain better embrittlement suppression, A 1 O, A 2 O and A 3 It is more preferable that each O is independently an alkyleneoxy group having 2 to 3 carbon atoms, and it is more preferable that each a, b, and c is independently a number from 0 to 12, more preferably a number from 0 to 8, and even more preferably a number from 0 to 5.

[0026] The compound represented by general formula (2) can be obtained by dehydration condensation of alcohols, phenols, and alkylene oxide adducts of alcohols or phenols with phosphoric acid, by a thermal reaction with diphosphorus pentoxide, or by a thermal reaction with phosphorus trichloride.

[0027] Specific examples of the compound represented by general formula (2) include monoalkyl phosphates, polyoxyalkylene monoalkyl ether phosphates, dialkyl phosphates, polyoxyalkylene dialkyl ether phosphates, trialkyl phosphates, polyoxyalkylene trialkyl ether phosphates, polyoxyalkylene monostyrenated phenyl ether phosphates, and polyoxyalkylene distyrenated phenyl ether phosphates.

[0028] Among these, monoalkyl phosphates, polyoxyalkylene monoalkyl ether phosphates, dialkyl phosphates, polyoxyalkylene dialkyl ether phosphates, trialkyl phosphates, and polyoxyalkylene trialkyl ether phosphates are preferred for achieving excellent embrittlement suppression, and monoalkyl phosphates, polyoxyalkylene monoalkyl ether phosphates, dialkyl phosphates, and polyoxyalkylene dialkyl ether phosphates are more preferred.

[0029] The salt of the compound represented by the general formula (2) is a phosphate salt, and in the compound represented by the general formula (2), the value of any one or more of a, b, and c is 0, and PO - -X + The structure of (X + is an alkali metal cation or an organic ammonium cation). A salt in which one of a, b, or c is 0, a salt in which two of a, b, or c are 0, or a salt in which all three of a, b, or c are 0 may be mixed. Furthermore, in terms of cationic species, alkali metal salts such as sodium salts and potassium salts, and organic ammonium salts such as alkanolammonium salts and quaternary ammonium salts are preferred. Also, from the viewpoint of availability, if one or two of the values ​​of a, b, and c are 0, PO - -X + Preferably, the phosphate salt forms the following structure, and more preferably, it is an alkali metal salt or an organic ammonium salt. It is more preferred that the alkali metal salt is a sodium salt or a potassium salt, and the organic ammonium salt is an alkanolammonium salt or a quaternary ammonium salt.

[0030] [Poly(meth)acrylamide compounds] The poly(meth)acrylamide compound in the present invention is a polymer or copolymer containing a (meth)acrylamide monomer as an essential monomer component.

[0031] The poly(meth)acrylamide compound in the present invention preferably has a colloid equivalent value of −13 to 13 meq / g. The colloid equivalent value is a value that serves as an index of the ionicity of a water-soluble polymer such as a poly(meth)acrylamide compound. The larger the colloid equivalent value in the negative direction, the more anionic ionizable groups there are in the structure, and the larger the colloid equivalent value in the positive direction, the more cationic ionizable groups there are in the structure. The colloid equivalent value can be determined by the general colloid titration method using a potassium polyvinyl sulfonate (PVSK) solution, which will be described later.

[0032] The weight average molecular weight of the poly(meth)acrylamide compound in the present invention is preferably 100,000 to 25,000,000. If the weight average molecular weight is smaller than the above range, the cleaning bath tends to be less able to suppress embrittlement, whereas if it is larger than the above range, the cleaning bath tends to be less easy to handle and less able to suppress embrittlement.

[0033] Examples of types of poly(meth)acrylamide compounds include anionic poly(meth)acrylamide compounds, cationic poly(meth)acrylamide compounds, nonionic poly(meth)acrylamide compounds, and amphoteric poly(meth)acrylamide compounds, and it is preferable to contain one or more types selected from the group consisting of these. From the viewpoint of inhibiting embrittlement and inhibiting corrosion of metals used in devices and the like, the poly(meth)acrylamide compound is preferably an anionic poly(meth)acrylamide compound, a nonionic poly(meth)acrylamide compound, or a cationic poly(meth)acrylamide compound, more preferably anionic poly(meth)acrylamide compound or nonionic poly(meth)acrylamide compound, and even more preferably anionic poly(meth)acrylamide compound.

[0034] [Anionic poly(meth)acrylamide compounds] The anionic poly(meth)acrylamide compound is a copolymer in which a (meth)acrylamide monomer and an anionic vinyl monomer are copolymerized to form a main skeleton. The copolymer may be any of a block copolymer, a random copolymer, an alternating copolymer, etc.

[0035] The colloid equivalent value of the anionic poly(meth)acrylamide compound is preferably from -13 to -1 meq / g, more preferably from -7 to -1 meq / g, further preferably from -5 to -1 meq / g, and particularly preferably from -3.5 to -1 meq / g.

[0036] The molar ratio of (meth)acrylamide / anionic vinyl monomer in the copolymer is preferably 10 / 90 to 90 / 10. When the proportion of anionic vinyl monomer is high, the colloid equivalent value becomes larger in the negative direction.

[0037] The weight average molecular weight of the anionic poly(meth)acrylamide compound is preferably from 1 million to 25 million, more preferably from 3 million to 23 million, and even more preferably from 5 million to 21 million. If the weight average molecular weight is smaller than the above range, the cleaning bath tends to be less able to suppress embrittlement, whereas if it is larger than the above range, the cleaning bath tends to be less easy to handle and less able to suppress embrittlement.

[0038] Anionic vinyl monomers include unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, unsaturated sulfonic acids, and salts thereof. The salt of the anionic vinyl monomer is preferably, for example, an alkali metal salt of the anionic vinyl monomer, and more preferably a sodium salt of the anionic vinyl monomer.

[0039] Specific examples of unsaturated monocarboxylic acids include acrylic acid, methacrylic acid, 2-acrylamido-N-glycolic acid, 2-methacrylamido-N-glycolic acid, N-acryloylglycine, and 3-acrylamidopropanoic acid. Specific examples of unsaturated dicarboxylic acids include maleic acid, fumaric acid, itaconic acid, and citocholanic acid. Specific examples of unsaturated sulfonic acids include vinyl sulfonic acid and styrene sulfonic acid. The anionic vinyl monomers may be used alone or in combination of two or more.

[0040] The anionic poly(meth)acrylamide compound is preferably a copolymer of a (meth)acrylamide monomer and an unsaturated carboxylic acid and / or a salt thereof, more preferably a copolymer of a (meth)acrylamide monomer, acrylic acid and / or a salt thereof, and methacrylic acid and / or a salt thereof, and even more preferably a copolymer of a (meth)acrylamide monomer and acrylic acid and a salt thereof.

[0041] The anionic poly(meth)acrylamide compound preferably contains, for example, at least a structure represented by the following formula (3a).

[0042] [ka] (In the formula, R 6 , R 7 are each independently a hydrogen atom or a methyl group. +is an alkali metal cation or an organic ammonium cation, the alkali metal cation being a sodium cation or a potassium cation, and the organic ammonium salt being an alkanolammonium cation or a quaternary ammonium cation. d and e each represent the average ratio of the number of repeats of the repeating units bracketed in [ ], with the ratio d / e being 10 / 90 to 90 / 10. The arrangement of the respective repeating units may be random, block, or alternating.

[0043] [Cationic poly(meth)acrylamide compounds] The cationic poly(meth)acrylamide compound is a copolymer in which a (meth)acrylamide monomer and a cationic vinyl monomer are copolymerized to form a main skeleton. The copolymer may be any of a block copolymer, a random copolymer, and an alternating copolymer.

[0044] The colloid equivalent value of the cationic poly(meth)acrylamide compound is preferably 0.1 to 13 meq / g, more preferably 0.1 to 7 meq / g, still more preferably 0.1 to 5 meq / g, and particularly preferably 0.1 to 3.5 meq / g.

[0045] The molar ratio of (meth)acrylamide / cationic vinyl monomer in the copolymer is preferably 10 / 90 to 90 / 10. When the proportion of cationic vinyl monomer is high, the colloid equivalent value increases in the positive direction.

[0046] The weight average molecular weight of the cationic poly(meth)acrylamide compound is preferably from 100,000 to 20,000,000, more preferably from 500,000 to 15,000,000, and even more preferably from 500,000 to 10,000,000. If the weight average molecular weight is smaller than the above range, the cleaning bath tends to be less able to suppress embrittlement, whereas if it is larger than the above range, the cleaning bath tends to be less easy to handle and less able to suppress embrittlement.

[0047] Examples of cationic vinyl monomers include vinyl monomers having a tertiary amino group other than acrylamide, and vinyl monomers having a quaternary ammonium base. Examples of vinyl monomers having a tertiary amino group include dialkylaminoalkyl(meth)acrylates and dialkylaminoalkyl(meth)acrylamides. Specific examples of dialkylaminoalkyl(meth)acrylates include dimethylaminoethyl acrylate and dimethylaminoethyl methacrylate. Specific examples of dialkylaminoalkyl(meth)acrylamides include dimethylaminopropylacrylamide and dimethylaminopropylmethacrylamide. Examples of the vinyl monomer having a quaternary ammonium salt group include vinyl monomers obtained by reacting the above-mentioned vinyl monomer having a tertiary amino group with a quaternizing agent. The cationic vinyl monomers may be used alone or in combination of two or more. The quaternizing agent is a compound that reacts with a tertiary amino group to form a salt, and specifically, examples thereof include alkyl sulfates having 1 to 4 carbon atoms, such as dimethyl sulfate and diethyl sulfate, methyl chloride, and benzyl chloride. Examples include halides.

[0048] The cationic poly(meth)acrylamide compound is preferably a copolymer of a (meth)acrylamide monomer and a vinyl monomer having a quaternary ammonium base and / or a salt thereof, and more preferably a copolymer of a (meth)acrylamide monomer and an alkyl acrylate quaternary ammonium ester salt and / or a salt thereof.

[0049] The cationic poly(meth)acrylamide compound preferably contains at least a structure represented by the following formula (3b), for example.

[0050] [ka] (In the formula, R6 , R 8 are each independently a hydrogen atom or a methyl group, and R 9 is an alkylene group having 1 to 4 carbon atoms, and R 10 ~R 12 are each independently a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and Z - is a halogen anion or R 13 SO4(R 13 is an alkyl group having 1 to 4 carbon atoms. d, f, and g each represent the average value of the ratio of the repeat numbers of the repeat units enclosed in [ ], the ratio d / (f+g) is 10 / 90 to 90 / 10, and the ratio f / g is 0 / 100 to 95 / 5. The arrangement order of each repeat unit may be random, block, or alternating.

[0051] [Nonionic poly(meth)acrylamide compounds] The nonionic poly(meth)acrylamide compound is a homopolymer in which acrylamide or methacrylamide is homopolymerized to form the main skeleton, a copolymer in which acrylamide and methacrylamide are copolymerized to form the main skeleton, or a copolymer in which (meth)acrylamide and a nonionic vinyl monomer are copolymerized to form the main skeleton. The copolymer may be any of a block copolymer, a random copolymer, and an alternating copolymer.

[0052] The colloid equivalent value of the nonionic poly(meth)acrylamide compound is preferably from -0.9 to 0 meq / g, more preferably from -0.9 to -0.7 meq / g, and even more preferably from -0.9 to -0.5 meq / g. The molar ratio of (meth)acrylamide / nonionic vinyl monomer in the copolymer is preferably 10 / 90 to 100 / 0.

[0053] The weight average molecular weight of the nonionic poly(meth)acrylamide compound is preferably from 1 million to 25 million, more preferably from 3 million to 23 million, and even more preferably from 5 million to 21 million. If the weight average molecular weight is smaller than the above range, the cleaning bath tends to be less able to suppress embrittlement, whereas if it is larger than the above range, the cleaning bath tends to be less easy to handle and less able to suppress embrittlement.

[0054] Examples of nonionic vinyl monomers include ethylene, butylene, vinyl chloride, and N-vinylpyrrolidone. The nonionic vinyl monomers may be used alone or in combination of two or more. You may do so.

[0055] The nonionic poly(meth)acrylamide compound is preferably a homopolymer of an acrylamide monomer, a homopolymer of a methacrylamide monomer, or a copolymer of an acrylamide monomer and a methacrylamide monomer.

[0056] The nonionic poly(meth)acrylamide compound preferably contains, for example, at least a structure represented by the following formula (3c).

[0057] [ka] (In the formula, h and i represent the average ratio of the number of repetitions of the repeating units enclosed in [ ], and the ratio h / i is 0 / 100 to 100 / 0. The arrangement order of the repeating units may be random, block, or alternating.)

[0058] [Amphoteric poly(meth)acrylamide compounds] The amphoteric poly(meth)acrylamide compound is a copolymer of a (meth)acrylamide monomer, an anionic vinyl monomer, and a cationic vinyl monomer. The copolymer may be a block copolymer, a random copolymer, or an alternating copolymer.

[0059] The colloid equivalent value of the amphoteric poly(meth)acrylamide compound preferably has a value of −13 to 0 meq / g for anionic and a value of 1 to 13 meq / g for cationic.

[0060] The molar ratio of (meth)acrylamide / (anionic vinyl monomer+cationic vinyl monomer) in the copolymer is preferably 10 / 90 / to 90 / 10, and the molar ratio of anionic vinyl monomer / cationic vinyl monomer in the copolymer is preferably 5 / 95 / to 95 / 5. When the proportion of (meth)acrylamide is high, the colloid equivalent value becomes small in absolute value, and approaches 0 meq / g for anionic and 1 meq / g for cationic. When the proportion of anionic vinyl monomer is high, the colloid equivalent value becomes larger in the negative direction. When the proportion of cationic vinyl monomer is high, the colloid equivalent value increases in the positive direction.

[0061] The weight average molecular weight of the amphoteric poly(meth)acrylamide compound is preferably from 100,000 to 20,000,000, more preferably from 500,000 to 15,000,000, and even more preferably from 500,000 to 10,000,000. If the weight average molecular weight is smaller than the above range, the cleaning bath tends to be less able to suppress embrittlement, whereas if it is larger than the above range, the cleaning bath tends to be less easy to handle and less able to suppress embrittlement.

[0062] Examples of the anionic vinyl monomer include unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, unsaturated sulfonic acids, and salts thereof. The salts of the anionic vinyl monomers are, for example, alkali metal salts of the anionic vinyl monomers. Salts are preferred, and sodium salts of anionic vinyl monomers are more preferred.

[0063] Specific examples of unsaturated monocarboxylic acids include acrylic acid, methacrylic acid, 2-acrylamido-N-glycolic acid, 2-methacrylamido-N-glycolic acid, N-acryloylglycine, and 3-acrylamidopropanoic acid. Specific examples of unsaturated dicarboxylic acids include maleic acid, fumaric acid, itaconic acid, and citocholanic acid. Specific examples of unsaturated sulfonic acids include vinyl sulfonic acid and styrene sulfonic acid. The anionic vinyl monomers may be used alone or in combination of two or more.

[0064] The cationic vinyl monomer includes a vinyl monomer having a tertiary amino group or a quaternary ammonium salt group. Examples of vinyl monomers having a tertiary amino group include dialkylaminoalkyl(meth)acrylates and dialkylaminoalkyl(meth)acrylamides. Specific examples of dialkylaminoalkyl(meth)acrylates include dimethylaminoethyl acrylate and dimethylaminoethyl methacrylate. Specific examples of dialkylaminoalkyl(meth)acrylamides include dimethylaminopropylacrylamide and dimethylaminopropylmethacrylamide.

[0065] Examples of the vinyl monomer having a quaternary ammonium salt group include vinyl monomers obtained by reacting the above-mentioned vinyl monomer having a tertiary amino group with a quaternizing agent. The cationic vinyl monomers may be used alone or in combination of two or more.

[0066] The amphoteric poly(meth)acrylamide compound is preferably a copolymer of a (meth)acrylamide monomer, an unsaturated carboxylic acid and / or a salt thereof, and a vinyl monomer having a quaternary ammonium base and / or a salt thereof, and more preferably a copolymer of a (meth)acrylamide monomer, acrylic acid and / or a salt thereof, and an alkyl acrylate quaternary ammonium ester and / or a salt thereof.

[0067] The amphoteric poly(meth)acrylamide compound preferably contains at least a structure represented by the following formula (3d), for example. [ka] (In the formula, R 6 , R 7 , R 8 are each independently a hydrogen atom or a methyl group, and R 9 is an alkylene group having 1 to 4 carbon atoms, and R 10 ~R 12 are each independently a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and Y + is an alkali metal cation or an organic ammonium cation, the alkali metal cation being a sodium cation or a potassium cation, and the organic ammonium salt being an alkanolammonium cation or a quaternary ammonium cation. Z - is a halogen anion or R 13 SO4 and R 13 is an alkyl group having 1 to 3 carbon atoms. d, e, f, and g each represent the average value of the ratio of the repeating numbers of the repeating units enclosed in [ ], and the ratio d / (e+f+g) is 10 / 90 to 90 / 10, the ratio e / (f+g) is 5 / 85 to 85 / 5, and the ratio f / g is 0 / 90 to 85 / 5. The arrangement order of the respective repeating units may be random, block, or alternating.

[0068] <Method for measuring colloid equivalent value> [Colloid equivalent value (Av) for anionic poly(meth)acrylamide compounds and nonionic poly(meth)acrylamide compounds] 1) Accurately weigh 0.1 g of sample into a 100 mL beaker, add 100 mL of distilled water, heat to 60°C and dissolve, then cool to room temperature (25°C) to make the sample solution. 2) Next, adjust the pH of the sample solution to 10.0 with 0.1% aqueous sodium hydroxide solution or 0.1% hydrochloric acid, add 1.0 mL of N / 200 methyl glycol chitosan solution to the sample solution, and stir. 3) Then, add 2 to 3 drops of toluidine blue indicator and add PVSK solution (N / 400 potassium polyvinyl sulfate solution) dropwise while stirring. 4) The end point is when the color of the sample solution changes from blue to reddish purple and does not change for 10 seconds or more, and when no color change is observed even when PVSK solution is further dropped, and the amount dropped at this point is X1 mL. 5) Repeat the procedure using a blank solution containing no sample to find the end point, and the amount of dripping at that point is X0 mL. 6) Calculate the colloid equivalent value Av using the following formula. (Av) [meq / q] = (X1 [mL] - X0 [mL]) × 1 / 2 × PVSK solution factor × 1 / (sample mass [g] × active ingredient concentration [%])

[0069] [Colloid equivalent value (Cv) for cationic poly(meth)acrylamide compounds] 1) Accurately weigh 0.1 g of sample into a 100 mL beaker, add 100 mL of distilled water, heat to 60°C and dissolve, then cool to room temperature (25°C) to make the sample solution. 2) Next, adjust the pH of the sample solution to 7.0 with 0.1% aqueous sodium hydroxide solution or 0.1% hydrochloric acid. 3) Then, add 2 to 3 drops of toluidine blue indicator and add PVSK solution (N / 400 potassium polyvinyl sulfate solution) dropwise while stirring. 4) The end point is when the color of the sample solution changes from blue to reddish purple and does not change for 10 seconds or more, and when no color change is observed even when PVSK solution is further dropped. The amount dropped at this point is Y1 mL. 5) Repeat the procedure using a blank solution containing no sample to find the end point, and the amount dropped at that point is Y0 mL. 6) Calculate the colloid equivalent value Cv using the following formula. (Cv) [meq / q] = (Y1 [mL] - Y0 [mL]) × 1 / 2 × PVSK solution factor × 1 / (sample mass [g] × active ingredient concentration [%])

[0070] [Colloid equivalent values ​​(Av, Cv) for amphoteric poly(meth)acrylamide compounds] Both the colloid equivalent value Av and the colloid equivalent value Cv are measured and calculated.

[0071] <Textile products> The textile product in the present invention refers to woven fabric, knitted fabric, nonwoven fabric, etc. made from fibers. Examples of fibers include, but are not limited to, natural fibers, synthetic fibers, semi-synthetic fibers, and regenerated fibers. Specific examples of natural fibers include cotton, linen, wool, and silk. Specific examples of synthetic fibers include nylon, polyester, polyurethane, and polyamide. Specific examples of semi-synthetic fibers include acetate and promix. Specific examples of regenerated fibers include rayon and cupra. Among these fibers, cotton, polyester, nylon, and blends thereof are preferred as they have a high waste reduction effect.

[0072] <Cleaning bath> The content of the fiber embrittlement inhibitor composition of the present invention in the washing bath is not particularly limited and may be determined appropriately. The washing bath is preferably prepared by diluting the fiber embrittlement inhibitor composition of the present invention with water by about 10 times or more. In order to obtain excellent embrittlement suppression properties, the concentration of the embrittlement suppression compound derived from the fiber embrittlement suppression composition of the present invention in the cleaning bath is preferably 0.1 to 10,000 ppm, more preferably 1 to 2,000 ppm, even more preferably 5 to 1,000 ppm, and particularly preferably 8 to 1,000 ppm. Therefore, it is preferable to mix the fiber embrittlement inhibitor composition of the present invention into the cleaning bath so as to achieve the above-mentioned concentration of the embrittlement inhibitor compound.

[0073] The cleaning bath can contain various additives, the types and amounts of which are appropriately determined depending on the purpose of use, within a range that does not inhibit the embrittlement-inhibiting effect of the fiber embrittlement-inhibiting agent composition of the present invention. Examples of various additives include liquid detergents, powder detergents, surfactants, inorganic compounds, chelating compounds, bleaching agents, organic solvents, enzymes, antioxidants, preservatives, fragrances, colorants, emulsifiers, antibacterial agents, natural products, pH adjusters, antifoaming agents, texture improvers, storage stability improvers, fluorescent agents, dye transfer inhibitors, redeposition inhibitors, soil-resistant processing agents, and pearlescent agents.

[0074] The surfactant may be a nonionic surfactant, an anionic surfactant, a cationic surfactant, or the like. As the inorganic compound, silicates, carbonates, sulfates, etc. can be used. As the chelate compound, tripolyphosphates, aminocarboxylates, etc. can be used. The bleaching agent may be hydrogen peroxide or sodium hypochlorite. The organic solvent may be an alcohol-based solvent, a glycol-based solvent, a hydrocarbon-based solvent, or the like. The enzymes that can be used include proteases, lipases, amylases, cellulases, and the like. As the stain-proofing agent, a soil release agent, a soil guard agent, etc. can be used.

[0075] <Cleaning bath pH> The pH of the washing bath when washing textile products using the fiber embrittlement suppressant composition of the present invention is preferably 5 or higher, more preferably 6 to 14, and even more preferably 8 to 13. Outside the above range, the washing properties and anti-soiling properties are likely to decrease. The pH of the cleaning bath can be measured by a known method such as a glass electrode method. The method for adjusting the pH of the cleaning solution is not particularly limited, but sodium orthosilicate, sodium metasilicate, No. 1 sodium silicate, No. 2 sodium silicate, No. 3 sodium silicate, No. 4 sodium silicate, potassium orthosilicate, potassium metasilicate, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, alkanolamines, sodium tripolyphosphate, etc. can be used.

[0076] <Cleaning method> The method for cleaning textile products using the fiber embrittlement inhibitor composition of the present invention includes agitating, rotating, Examples of cleaning methods include those that apply physical external forces such as dropping and vibration. Then, textile products can be washed using a commercial automatic washing machine, a continuous washing machine, a household washing machine, or the like, with the embrittlement inhibitor composition of the present invention or a washing bath containing the embrittlement inhibitor composition for fibers. The fiber embrittlement inhibitor composition of the present invention may be added to a washing bath simultaneously with detergent components used in washing textile products in general and commercial washing, such as alkaline agents, bleaching agents, and surfactants, or may be added separately to the washing bath. However, it is preferable that the fiber embrittlement inhibitor composition be added to the washing bath before the step of washing textile products with detergent components is carried out or simultaneously with the start of the washing step.

[0077] <Bath ratio> The bath ratio is the mass ratio of the textile product, which is not to be washed, to the washing bath, and is a value obtained from the following formula. Bath ratio = textile mass / washing bath mass The bath ratio during washing is not particularly limited and may be determined as appropriate, but in order to maximize the embrittlement suppression effect, the bath ratio by mass is preferably 1 / 200 to 1 / 2, more preferably 1 / 100 to 1 / 2, and even more preferably 1 / 50 to 1 / 3.

[0078] Furthermore, the mass ratio of the embrittlement-inhibiting compound contained in the embrittlement-inhibiting composition of the present invention to the textile product that is not washed, i.e., mass of embrittlement-inhibiting compound / mass of textile product, is not particularly limited and may be determined appropriately, but from the viewpoint of embrittlement-inhibiting properties, it is preferably 0.0001 to 5%, more preferably 0.001 to 5%, even more preferably 0.01 to 4%, particularly preferably 0.025 to 3%, and most preferably 0.05 to 2%.

[0079] <Washing temperature> The washing temperature (washing bath temperature) when washing textile products using the fiber embrittlement inhibitor composition of the present invention is not particularly limited and may be determined appropriately, but in order to bring out an excellent embrittlement inhibitor effect, it is preferably 10 to 90°C, more preferably 30 to 85°C, and even more preferably 40 to 80°C.

[0080] <Cleaning time> The cleaning time when cleaning textile products using the fiber embrittlement inhibitor composition of the present invention is not particularly limited and may be determined as appropriate. In order to obtain excellent cleaning properties and productivity, the cleaning time is preferably from 30 seconds to 120 minutes, more preferably from 1 to 60 minutes, and even more preferably from 2 to 15 minutes. [Example]

[0081] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description.

[0082] <Raw materials> The raw materials used in the examples are listed below. [Embrittlement suppressing compound] (anionic poly(meth)acrylamide compounds) Anionic poly(meth)acrylamide 1: MT Aquapolymer Co., Ltd., product name: "Acofloc A-125." A copolymer containing acrylamide and sodium acrylate-derived structures. Weight-average molecular weight: 13 million, colloidal equivalent: -3.0 meq / g. White granular. Solid content (anionic poly(meth)acrylamide): 92.1% by mass. Anionic poly(meth)acrylamide 2: MT Aquapolymer Co., Ltd., product name "Acofloc E-2650". Copolymer containing acrylamide and sodium acrylate-derived structure. Weight average molecular weight 9 million, colloidal equivalent value -3.3 meq / g. Solid content (aniline) Poly(meth)acrylamide) content: 40.1% by mass. Anionic poly(meth)acrylamide 3: MT Aquapolymer Co., Ltd., product name: "Acofloc A-95H." A copolymer containing acrylamide and sodium acrylate structures. Weight-average molecular weight: 23 million, colloidal equivalent: -1.2 meq / g. Solids (anionic poly(meth)acrylamide) content: 92.8% by mass.

[0083] (Nonionic poly(meth)acrylamide compound) Nonionic poly(meth)acrylamide 1: MT Aquapolymer Co., Ltd., product name: "Acofloc N-104." A copolymer containing acrylamide-derived structures. Weight-average molecular weight: 17 million, colloidal equivalent: -0.9 meq / g. Solids content (nonionic poly(meth)acrylamide) 93.3% by mass.

[0084] (cationic poly(meth)acrylamide compound) Cationic poly(meth)acrylamide 1: MT Aquapolymer Co., Ltd., product name: Aronflock E-3560. A copolymer containing acrylamide and a structure derived from a quaternary ammonium acrylate ester. Weight-average molecular weight: 1,000,000, colloidal equivalent: 3.1 meq / g. Solid content (cationic poly(meth)acrylamide) 41% by mass. Cationic poly(meth)acrylamide 2: MT Aquapolymer Co., Ltd., product name: Aronflock E-1310N. A copolymer containing acrylamide and a structure derived from alkyl acrylate quaternary ammonium salt ester. Weight-average molecular weight: 7 million, colloidal equivalent: 0.5 meq / g. Solid content (cationic poly(meth)acrylamide) 31.9% by mass.

[0085] (sulfosuccinic acid compounds) Sodium di-2-ethylhexyl sulfosuccinate: Manufactured by Nacalai Tesque, Inc., product name: "Sodium di-2-ethylhexyl sulfosuccinate." Solid content (sodium di-2-ethylhexyl sulfosuccinate) is 100% by mass.

[0086] (phosphate ester compounds) Polyoxyethylene oleyl ether phosphate: Product name "Phosphanol RB-410" manufactured by Toho Chemical Industry Co., Ltd. Solid content (polyoxyethylene oleyl ether phosphate) 98.5% by mass.

[0087] (surfactant) Surfactant 1: Softanol 90, manufactured by Nippon Shokubai Co., Ltd. A linear secondary alcohol (carbon number 12) with 9 moles of ethylene oxide. Surfactant 2: NOF Corporation, product name "Coconut Fatty Acid" neutralized with equimolar sodium hydroxide. Sodium coconut fatty acid. Surfactant 3: Teika Power L-101 (manufactured by Teika Corporation) is an equimolar sodium hydroxide neutralized product. It is a linear alkyl (carbon number 10-14) sodium benzenesulfonate.

[0088] (Alkaline agent) Sodium hydroxide: Manufactured by Tokuyama Corporation, product name "Liquid Caustic Soda." Sodium orthosilicate: Manufactured by Koei Chemical Industry Co., Ltd., product name "Neo Ortho 80 Powder."

[0089] (bleach) Hydrogen peroxide (35%): Manufactured by Hodogaya Chemical Industry Co., Ltd., product name: "Hydrogen Peroxide 35%." Sodium hypochlorite: Manufactured by Osaka Soda Co., Ltd., product name "Mecron 12%."

[0090] (Test cloth for cleaning evaluation) Wet artificially soiled cloth: Made by the Laundry Science Association Blood-stained cloth: EMPA111, manufactured by the Swiss Federal Laboratories for Materials Testing and Research. (Test cloth for evaluating embrittlement prevention) Cotton cloth: Made by Yato Shoten PET Tropical: Made by Irozome Co., Ltd.

[0091] <How to wash and dry the test cloth> [Example 1] A cleaning bath having the following concentration was prepared using anionic poly(meth)acrylamide 1 as the embrittlement inhibitor composition, surfactant 1 as the surfactant, sodium hydroxide as the alkaline agent, hydrogen peroxide (35%) as the bleaching agent, and water. Anionic poly(meth)acrylamide 1 solids 20 ppm Surfactant 1 200ppm Sodium hydroxide 400 ppm Hydrogen peroxide 500 ppm Water Residual

[0092] Then, the test cloth for evaluating the cleaning property and the test cloth for evaluating the embrittlement prevention property were washed in the cleaning bath obtained above, dried, and subjected to the cleaning property evaluation test and the embrittlement prevention property evaluation test. The evaluation results are shown in Table 1.

[0093] [Examples 2 to 10] The cleaning baths were prepared in the same manner as in Example 1, except that the type of embrittlement inhibitor composition in the cleaning bath was changed as shown in Table 1. Tests for evaluating cleaning properties and embrittlement inhibition properties were then carried out, and the results are shown in Tables 1 and 2.

[0094] [Examples 11 to 15] The cleaning baths were prepared in the same manner as in Example 1, except that the concentrations of the embrittlement-inhibiting compounds and the bath ratio in the cleaning baths were changed as shown in Table 2. Tests for evaluating the cleaning properties and the embrittlement-inhibiting properties were then carried out, and the results are shown in Table 2.

[0095] [Examples 16 to 23] Cleaning baths were prepared in the same manner as in Example 1, except that the type of embrittlement inhibitor composition, the concentration of the embrittlement inhibitor compound, and the bath ratio in the cleaning bath were changed as shown in Table 2. Tests for evaluating cleaning performance and embrittlement inhibition were then conducted, and the results are shown in Tables 2, 3, and 4.

[0096] [Examples 24 to 25] The cleaning baths were prepared in the same manner as in Example 1, except that the type of surfactant in the cleaning bath was changed as shown in Table 3. Tests for evaluating cleaning performance and embrittlement prevention performance were then carried out, and the results are shown in Table 3.

[0097] [Example 26] The cleaning bath was prepared in the same manner as in Example 1, except that the type of alkaline agent in the cleaning bath was changed according to the description in Table 3. A cleaning performance evaluation test and an embrittlement prevention evaluation test were carried out, and the results are shown in Table 4.

[0098] [Example 27] The cleaning bath was prepared in the same manner as in Example 1, except that the type of bleach in the cleaning bath was changed according to the description in Table 3, and a cleaning performance evaluation test and an embrittlement prevention evaluation test were carried out. The results are shown in Table 4.

[0099] [Example 28] A cleaning bath was prepared in the same manner as in Example 1, except that no alkaline agent was added to the cleaning bath. A cleaning performance evaluation test and an embrittlement prevention evaluation test were carried out, and the results are shown in Table 4.

[0100] [Example 29] A cleaning bath was prepared in the same manner as in Example 1, except that no bleach was added to the cleaning bath. Tests for evaluating cleaning properties and embrittlement prevention properties were conducted, and the results are shown in Table 4.

[0101] [Examples 30 to 34] Cleaning baths were prepared in the same manner as in Example 1, except that the type of embrittlement inhibitor composition and the concentration of the embrittlement inhibitor compound in the cleaning bath were changed as shown in Table 3. Tests for evaluating cleaning properties and embrittlement inhibition properties were then conducted, and the results are shown in Table 4.

[0102] [Comparative Example 1] A test for evaluating cleaning properties and a test for evaluating embrittlement prevention properties were carried out in the same manner as in Example 1, except that the cleaning bath was changed to water only. The results are shown in Table 5.

[0103] Comparative Example 2 A cleaning bath was prepared in the same manner as in Example 1, except that no embrittlement inhibitor composition was added to the cleaning bath. A cleaning performance evaluation test and an embrittlement inhibition evaluation test were carried out, and the results are shown in Table 5.

[0104] Comparative Example 3 A cleaning bath was prepared in the same manner as in Example 13, except that no embrittlement inhibitor composition was added to the cleaning bath. A cleaning performance evaluation test and an embrittlement inhibition evaluation test were carried out, and the results are shown in Table 5.

[0105] Comparative Example 4 A cleaning bath was prepared in the same manner as in Example 1, except that the embrittlement inhibitor composition and the alkaline agent were not added to the cleaning bath. A cleaning performance evaluation test and an embrittlement inhibition evaluation test were carried out, and the results are shown in Table 5.

[0106] Comparative Example 5 A cleaning bath was prepared in the same manner as in Example 1, except that the embrittlement inhibitor composition and the bleaching agent were not added to the cleaning bath. A cleaning performance evaluation test and an embrittlement inhibition evaluation test were carried out, and the results are shown in Table 5.

[0107] Comparative Example 6 A cleaning bath was prepared in the same manner as in Example 1, except that the embrittlement inhibitor composition, alkaline agent, and bleaching agent were not added to the cleaning bath. A cleaning performance evaluation test and an embrittlement inhibition evaluation test were conducted, and the results are shown in Table 5.

[0108] <Evaluation method> [Cleaning evaluation] The wet artificially soiled and blood-stained cloths used as test cloths for cleaning evaluation, and the white cloth (the fabric before applying each artificial soil) used as a blank, were each cut into 5cm x 5cm pieces. Three pieces of each were cut into pieces and used as test specimens, and the results of the three pieces were averaged. First, the reflectance (550 nm) of the surface of the test piece fabric before washing was measured. The test piece and the load cloth were placed together in a washing bath and washed using the following washing equipment and under the following washing conditions: Washing equipment: Terg-O-Tometer (manufactured by Daiei Scientific Instruments Co., Ltd.) , TM-8 type) ·Reflectance measuring device: Colorimeter CM-53D (manufactured by Murakami Color Research Institute) ·Cleaning conditions for test cloth for cleaning evaluation Cleaning bath volume: 1000 mL Bath ratio: 1 / 30 Washing temperature: 60℃ Cleaning time: 10 minutes Rotation speed: 90 rpm Load cloth: cotton cloth 30g Washing conditions for test cloth used to evaluate embrittlement prevention Cleaning bath volume: 1000 mL Bath ratio: 1 / 30 Washing temperature: 60℃ Cleaning time: 200 minutes Rotation speed: 120 rpm Next, the test cloth for evaluating cleanability after washing and the blank were placed in a circulating air dryer and dried at 80° C. for 30 minutes, after which the reflectance (550 nm) of the surface was measured. The cleaning rate was calculated using the following formula. Cleaning rate (%) = [(reflectance after cleaning and drying - reflectance before cleaning) / (reflectance of white cloth - reflectance before cleaning)] x 100 Furthermore, for each of the wet artificially soiled cloth and the blood-stained cloth, a score was assigned based on the calculated cleaning rate according to the following criteria. A score of 2 or more for both the wet artificially soiled cloth and the blood-stained cloth was considered to be pass. ·Score criteria for wet artificially soiled cloth 5 points: Cleaning rate of 65% or more 4 points: Cleaning rate 55% or more, less than 65% 3 points: cleaning rate 45% or more, less than 55% 2 points: cleaning rate 35% or more, less than 45% 1 point: cleaning rate less than 35% ·Score criteria for blood-stained cloth 5 points: Cleaning rate of 50% or more 4 points: cleaning rate 40% or more, less than 50% 3 points: cleaning rate 30% or more, less than 40% 2 points: cleaning rate 20% or more, less than 30% 1 point: cleaning rate less than 20%

[0109] <Evaluation of embrittlement prevention> Test cloths for evaluating embrittlement prevention were prepared using cotton gold foil and PET tropical, which were cut to a size of 25 cm x 30 cm. The cut edges were treated with a serger to prevent fraying, and two pieces of each were prepared to serve as test specimens. After washing and drying, one test cloth for evaluating embrittlement prevention properties was cut into three test pieces each measuring 2.5 cm x 15 cm. Next, the tensile strength (warp direction) of each of the three test pieces was measured using a tensile tester ("Autograph AG-IS" manufactured by Shimadzu Corporation). The average tensile strength was calculated from the measured values ​​of the tensile strength of three test pieces. Similarly, the average tensile strength was calculated for the test cloth for evaluating embrittlement prevention properties that had been washed with water only, and this was used as the average tensile strength of the blank. Then, the embrittlement rate was calculated by the following formula. Embrittlement rate (%) = [(average tensile strength of blank - average tensile strength of test piece) / average tensile strength of blank] x 100 The calculated embrittlement rate was scored according to the following criteria, and a score of 2 or more for both cotton gold width and PET tropical was considered to be acceptable. ·Score criteria 5 points: Embrittlement rate less than 2.5% 4 points: Embrittlement rate 2.5% or more, less than 5% 3 points: Embrittlement rate 5% or more, less than 7.5% 2 points: Embrittlement rate 7.5% or more, less than 10% 1 point: embrittlement rate of 10% or more

[0110] [Table 1]

[0111] [Table 2]

[0112] [Table 3]

[0113] [Table 4]

[0114] [Table 5]

[0115] <Summary of evaluation results> All of Examples 1 to 34, in which the fiber embrittlement suppression composition of the present invention was contained in the cleaning bath, showed an excellent balance of cleaning properties and embrittlement suppression properties. On the other hand, all of Comparative Examples 1 to 6, in which the fiber embrittlement suppression composition of the present invention was not contained in the cleaning bath, showed poor results in either the cleaning ability or the embrittlement suppression ability. [Industrial Applicability]

[0116] The fiber embrittlement inhibitor composition of the present invention has an excellent balance between detergency and embrittlement inhibitory properties, and therefore can be used as a fiber embrittlement inhibitor in commercial laundering such as laundering in the linen supply field, for example, in cleaning fiber products to which a complex of sebum stains, protein stains, particle stains, etc. are attached, such as sheets, yukata, towels, tablecloths, and napkins used in hotels, inns, restaurants, and hot spring facilities.

Claims

1. A fiber embrittlement inhibitor composition for use by mixing it into a washing bath for washing textile products, The fiber embrittlement suppressant composition contains an embrittlement suppression compound, The embrittlement suppression compound is a fiber embrittlement suppression composition, characterized in that it contains at least one compound selected from the group consisting of a sulfosuccinate compound represented by formula (1), a phosphate compound represented by formula (2) or a phosphate salt thereof, and a poly(meth)acrylamide compound having a colloid equivalent value of −13 to 13 meq / g. 【Chemistry 1】 (In the formula, R 1 and R 2 are each independently a monovalent hydrocarbon group having 1 to 22 carbon atoms, M + is a hydrogen cation, an alkali metal cation, or an organic ammonium cation. 【Chemistry 2】 (In the formula, A 1 O.A. 2 O and A 3 Each O is independently an alkyleneoxy group having 2 to 4 carbon atoms; 3 is a hydrocarbon group having 4 to 22 carbon atoms, and R 4 and R 5 are each independently a hydrogen atom or a hydrocarbon group having 4 to 22 carbon atoms. a, b, and c are each a repeating unit A 1 O.A. 2 O.A. 3 represents the average number of repeating O's, and each O is independently a number from 0 to 20.)

2. the embrittlement-suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes an anionic poly(meth)acrylamide compound, the anionic poly(meth)acrylamide compound has a colloid equivalent value of −13 to −1 meq / g and a weight average molecular weight of 1,000,000 to 25,000,000; The fiber embrittlement inhibitor composition according to claim 1.

3. the embrittlement-suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes a cationic poly(meth)acrylamide compound, The cationic poly(meth)acrylamide compound has a colloid equivalent value of 0.1 to 13 meq / g and a weight average molecular weight of 100,000 to 20,000,000. The fiber embrittlement inhibitor composition according to claim 1.

4. the embrittlement-suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes a nonionic poly(meth)acrylamide compound, the nonionic poly(meth)acrylamide compound has a colloid equivalent value of −0.9 to 0 meq / g and a weight average molecular weight of 1,000,000 to 25,000,000; The fiber embrittlement inhibitor composition according to claim 1.

5. the embrittlement-suppressing compound contains the poly(meth)acrylamide compound, the poly(meth)acrylamide compound includes an amphoteric poly(meth)acrylamide compound, The amphoteric poly(meth)acrylamide compound has a colloid equivalent value of −13 to 0 meq / g and 1 to 13 meq / g, and a weight average molecular weight of 100,000 to 20,000,000. The fiber embrittlement inhibitor composition according to claim 1.

6. the embrittlement-suppressing compound includes the sulfosuccinate ester compound, The sulfosuccinate compound includes at least one selected from the group consisting of sulfosuccinate diesters and sulfonates thereof. The fiber embrittlement inhibitor composition according to claim 1.

7. the embrittlement suppression compound contains the phosphate ester compound or a phosphate thereof, The phosphate ester compound or its phosphate salt includes at least one selected from the group consisting of monoalkyl phosphates, polyoxyalkylene monoalkyl ether phosphates, dialkyl phosphates, polyoxyalkylene dialkyl ether phosphates, and phosphate salts thereof. The fiber embrittlement inhibitor composition according to claim 1.

8. A method for washing textile products, which comprises using a washing bath containing the fiber embrittlement suppressant composition according to claim 1.

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