JP5378967B2 - Textile processing composition and method for producing fiber processed product using the composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for textile processing having excellent storage stability without causing blisters such as bulges or cracks during a drying treatment in production, and to provide a stable method for producing a textile processed product having excellent bonding strength, shape retaining properties etc., without generating formalin. <P>SOLUTION: The composition for textile processing includes, based on (a) 100 pts.wt. (in terms of the solid content) of a copolymer latex wherein at least one glass transition temperature is present between -50 and 30&deg;C, (b) 0.5-3 pts.wt. of a nonionic surfactant having a cloud point within the range of 50-80&deg;C; and (c) 0.1-2 pts.wt. of a zirconium-based compound, and is free of a substance derived from the formalin. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a fiber processing composition and a method for producing a fiber processed product using the composition.
Specifically, we provide fiber processing compositions that are free of blisters during heat-drying during manufacturing, have excellent storage stability, have excellent adhesive strength and mold retention, and do not generate formalin. About doing.

  In general, a backing adhesive such as tufted carpet or a binder of nonwoven fabric uses a water-based adhesive in which an inorganic filler such as calcium carbonate is blended in a butadiene copolymer latex or an acrylic emulsion. After these adhesives are applied to the substrate, they are dried with a gas burner or high-temperature hot air to form an application layer having a bonding function and a function for adjusting the texture.

  In recent years, the number of cases where the speed of the coating machine is increased in order to pursue productivity, and measures such as increasing the temperature and increasing the air volume are taken as the drying process. However, when water-based adhesives are heated and dried rapidly, phenomena such as blisters and cracks called so-called blisters are likely to occur, and when these phenomena occur, productivity is remarkably reduced and product quality is reduced. I had it.

  As a method for preventing blisters during the drying treatment, a method in which a polyorganosiloxane heat-sensitive compound and a nonionic surfactant are used as additives (Patent Document 1: Japanese Patent Publication No. 56-44191), and starch as the most common example. Is known (Patent Document 2: Japanese Patent Publication No. 57-30429).

For example, when a polyorganosiloxane heat-sensitive compound is used, it is necessary to use a chemically unstable latex, which may cause gelation during storage.
Further, when starch is used, there is no concern about gelation, but there is a problem that the blister resistance is deteriorated over time and it is easy to rot.

  In addition, there is an example (a patent document 3: Japanese Patent Laid-Open No. 03-23479 gazette) using ammonium zirconium carbonate, which is a zirconium-based compound, for preventing blistering, but the adhesive has long-term storage stability and fluidity. The performance balance such as sex is insufficient.

Furthermore, although there is an example (Patent Document 4: Japanese Patent Laid-Open No. 04-261453) using a synthetic resin latex composition in which an alkylphenol-formalin condensate is blended with latex, there is a concern about the occurrence of formalin, which is unfavorable for the environment.

Japanese Examined Patent Publication No. 56-44191

Japanese Patent Publication No.57-30429

JP 03-23479 A

JP 04-261453 A

  The object of the present invention is to solve the current problems in view of the above-mentioned circumstances, and is a fiber processing composition that is free of blisters during the drying process during production and has excellent storage stability, and has an adhesive strength and a mold. An object of the present invention is to provide a stable method for producing a processed fiber product which is excellent in retainability and does not generate formalin.

That is, the present invention
(1) (a) 25 to 55% by weight of an aliphatic conjugated diene monomer, 0.5 to 4% by weight of an ethylenically unsaturated carboxylic acid monomer, and other monomers 41 to 74 that can be copolymerized. (B) Cloud point of 50 to 50 parts per 100 parts by weight (in terms of solid content) of copolymer latex having at least one glass transition temperature obtained by emulsion polymerization of 5% by weight between −50 to 30 ° C. It contains 0.5 to 3 parts by weight of a nonionic surfactant in the range of 80 ° C. and (c) 0.1 to 2 parts by weight of a zirconium-based compound, and does not contain a formalin-derived substance. A fiber processing composition,
(2) In producing a fiber processed product obtained by applying the fiber processing composition according to (1) to a fiber base material, a mixer provided immediately before the coating treatment step of the composition, (c ) A method for producing a processed fiber product, comprising adding a part or all of a zirconium-based compound,
I will provide a.

  According to the present invention, it is a fiber processing composition excellent in storage stability, and there is no generation of blisters during the drying process when manufacturing a fiber processed product using the composition, and the adhesive strength, mold holding property, etc. Provided is a stable method for producing a processed fiber product that is excellent and does not generate formalin.

It is explanatory drawing about the manufacturing method of a fiber processed product. Example 9

The present invention is described in detail below.
Examples of the aliphatic conjugated diene monomer used in (a) copolymer latex in the present invention include 1,3-butadiene, 2-methyl-1,3-butadiene, and 2,3-dimethyl-1,3-. Examples thereof include butadiene, 2-chloro-1,3-butadiene, substituted linear conjugated pentadienes, substituted and side chain conjugated hexadienes, and the like can be used alone or in combination. In particular, the use of 1,3-butadiene is preferred.
The amount of the aliphatic conjugated diene monomer used is 25 to 55% by weight in the copolymer latex constituent. If it is less than 25% by weight, the performance as an adhesive will not be exhibited, and the fiber-processed product will be easily broken. If it exceeds 55% by weight, the processed fiber product becomes sticky and the mold retainability is not good.

Examples of the ethylenically unsaturated carboxylic acid monomer include mono- or dicarboxylic acids (anhydrides) such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid. It can be used above.
The amount of the ethylenically unsaturated carboxylic acid monomer used is 0.5 to 4% by weight in the copolymer latex constituent. If it is less than 0.5% by weight, the stability of the copolymer latex is insufficient, so that the storage stability of the resulting composition is significantly reduced. When the amount of the ethylenically unsaturated carboxylic acid monomer exceeds 4% by weight, the function of preventing blistering is lowered, and the storage stability of the obtained composition is also lowered.

  Other monomers copolymerizable with the above aliphatic conjugated diene monomers and ethylenically unsaturated carboxylic acid monomers include alkenyl aromatic monomers, vinyl cyanide monomers, unsaturated carboxylic acids. Examples include acid alkyl ester monomers, unsaturated monomers containing a hydroxyalkyl group, and unsaturated carboxylic acid amide monomers.

  Examples of the alkenyl aromatic monomer include styrene, α-methylstyrene, methyl α-methylstyrene, vinyltoluene and divinylbenzene, and these can be used alone or in combination. In particular, use of styrene is preferable.

  Examples of the vinyl cyanide monomer include acrylonitrile, methacrylonitrile, α-chloroacrylonitrile, α-ethylacrylonitrile, and the like, and one or more of these can be used.

  Examples of unsaturated carboxylic acid alkyl ester monomers include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, glycidyl methacrylate, dimethyl fumarate, diethyl fumarate, dimethyl maleate, diethyl malate, dimethyl itaconate, Examples thereof include monomethyl fumarate, monoethyl fumarate, 2-ethylhexyl acrylate, and the like can be used alone or in combination.

  Examples of unsaturated monomers containing a hydroxyalkyl group include β-hydroxyethyl acrylate, β-hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate, and 3-chloro-2-hydroxypropyl. Methacrylate, di- (ethylene glycol) maleate, di- (ethylene glycol) itaconate, 2-hydroxyethyl maleate, bis (2-hydroxyethyl) maleate, 2-hydroxyethyl methyl fumarate, and the like. Or 2 or more types can be used.

  Examples of the unsaturated carboxylic acid amide monomer include acrylamide, methacrylamide, N-methylol acrylamide, N-methylol methacrylamide, N, N-dimethylacrylamide, and the like, and one or more of these may be used. it can.

In the present invention, the method for adding various components in emulsion polymerization is not particularly limited, and any of a batch addition method, a divided addition method, a continuous addition method, and a power feed method can be employed. As the polymerization method, batch polymerization, semi-batch polymerization, seed polymerization and the like can be used.
Furthermore, in the case of emulsion polymerization, conventional emulsifiers, chain transfer agents, polymerization initiators, hydrocarbon solvents, electrolytes, polymerization accelerators, chelating agents, and the like can be used.

In the present invention, (a) as an emulsifier used in emulsion polymerization of copolymer latex, sulfate ester salt of higher alcohol, alkylbenzene sulfonate, alkyl diphenyl ether sulfonate, aliphatic sulfonate, aliphatic carboxylic acid Anionic surfactants such as acid salts, sulfate salts of nonionic surfactants, nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyalkylene alkyl ethers and polyoxyethylene derivatives, amphoteric interfaces such as betaine types One or more activators can be used in combination.
However, formalin-based nonionic surfactants such as alkylphenol-formalin condensate and naphthalenesulfonic acid formalin condensate are not preferred because of the concern of formalin generation.

  In the present invention, (a) the chain transfer agent used for the copolymer latex includes n-hexyl mercaptan, n-octyl mercaptan, t-octyl mercaptan, n-dodecyl mercaptan, t-dodecyl mercaptan, n-stearyl mercaptan, and the like. Xanthogen compounds such as alkyl mercaptan, dimethylxanthogen disulfide, diisopropylxanthogen disulfide, and thiuram compounds such as terpinolene, tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetramethylthiuram monosulfide, α-methylstyrene dimer, 2,6 -Phenol compounds such as di-t-butyl-4-methylphenol and styrenated phenol, allyl compounds such as allyl alcohol, dichloromethane, dibromide Halogenated hydrocarbon compounds such as methane and carbon tetrabromide, vinyl ethers such as α-benzyloxystyrene, α-benzyloxyacrylonitrile, α-benzyloxyacrylamide, triphenylethane, pentaphenylethane, acrolein, methacrolein, thioglycol An acid, thiomalic acid, 2-ethylhexyl thioglycolate, etc. are mentioned, These can be used 1 type or 2 or more types.

  In the present invention, (a) the polymerization initiator used in the copolymer latex includes water-soluble polymerization initiators such as potassium persulfate, sodium persulfate, and ammonium persulfate, redox polymerization initiators, and oils such as benzoyl peroxide. A soluble polymerization initiator can be appropriately used. In particular, the use of a water-soluble polymerization initiator is preferred.

  In the emulsion polymerization, saturated hydrocarbons such as pentane, hexane, heptane, octane, cyclohexane, cycloheptane, and unsaturated carbons such as pentene, hexene, heptene, cyclopentene, cyclohexene, cycloheptene, 4-methylcyclohexene, 1-methylcyclohexene, etc. Hydrocarbon solvents such as aromatic hydrocarbons such as hydrogen, benzene, toluene and xylene may be used.

  The glass transition temperature of (a) copolymer latex in this invention exists between -50-30 degreeC. If the glass transition temperature of the copolymer latex is less than −50 ° C., the fiber processed product becomes sticky and the mold retainability is not good. On the other hand, when the temperature exceeds 30 ° C., the performance as a binder is difficult to be exhibited, and the composition is liable to fall off, fibers are scattered, or the fiber processed product is easily broken.

Examples of the (b) nonionic surfactant in the present invention include polyoxyethylene alkyl ethers, polyoxyalkylene alkyl ethers, polyoxyethylene derivatives, and the like, and one or more of these can be used. However, formalin-based nonionic surfactants such as alkylphenol-formalin condensate and naphthalenesulfonic acid formalin condensate are not preferred because of the concern of formalin generation.
The (b) nonionic surfactant may be used at the time of emulsion polymerization or may be added to the latex obtained by emulsion polymerization. The total amount of the amount used at the time of emulsion polymerization and the amount added after the polymerization needs to be in the range of 0.5 to 3 parts by weight (in terms of solid content) with respect to 100 parts by weight of the copolymer latex. .
(B) When the content of the nonionic surfactant is less than 0.5 parts by weight, the storage stability and fluidity of the obtained composition are lowered, and when it exceeds 3 parts by weight, the function of preventing blistering is lowered. Resulting in.
(B) It is essential that the nonionic surfactant has a cloud point in the range of 50 to 80 ° C. Outside this range, the storage stability of the composition is lowered and the function of preventing blistering is lowered. End up.

Examples of the zirconium-based compound (c) in the present invention include zirconium carbonate, ammonium zirconium carbonate, zirconium acetate, ammonium zirconium acetate, zirconium oxide stearate and the like, and zirconium ammonium carbonate is preferable.
(C) The amount of the zirconium-based compound used is 0.1 to 2 parts by weight with respect to 100 parts by weight of the copolymer latex, and if it is less than 0.1 parts by weight, the function of preventing blistering is not manifested and 2 parts by weight. When it exceeds the part, the storage stability and fluidity of the composition are remarkably lowered.

  In the fiber processing composition of the present invention, one or more of calcium carbonate, clay, aluminum hydroxide, magnesium hydroxide, titanium oxide, barium sulfate and the like can be used as an inorganic filler. As for the usage-amount of an inorganic type filler, 200-500 weight part is preferable with respect to 100 weight part of copolymer latex. If it is less than 200 parts by weight, the cost of the composition becomes high. If it exceeds 500 parts by weight, the adhesive strength tends to decrease.

  In the fiber processing composition of the present invention, as other additives, anti-aging agents, ultraviolet absorbers, flame retardants, preservatives, deodorants, pH adjusters, thickeners, dispersants, foaming agents, anti-foaming agents. It is also possible to blend foaming agents, fillers, dyes, pigments, fragrances and the like. Moreover, you may use together polyorganosiloxane and starch which have the function of preventing a blister.

  In the fiber processing composition of the present invention, when (a) a copolymer latex, (b) a nonionic surfactant, and (c) a zirconium-based compound may be mixed, they may be mixed at the same time, but more preferably Add (c) a part or all of the zirconium-based compound to the mixture containing (a) copolymer latex and (b) nonionic surfactant with a mixer provided immediately before the coating treatment step. Is preferred.

The mixer provided immediately before the coating treatment step in the present invention is not particularly limited, and examples thereof include an Oaks mixer, a snake pump, a static mixer, and an impeller type small stirrer.
FIG. 1 is a diagram showing a flow path of a foaming machine (Oaks mixer) generally used in carpet backing. As shown in FIG. 1, the zirconium-based compound is preferably added before the pump for supplying the mixture to the mixing head, and in this case, it is convenient because it can be added using the negative pressure generated before the pump.

  Although it does not specifically limit as a method of apply | coating the composition for fiber processing of this invention, For example, the roll coat method, the foaming direct coat method, the impregnation method, the spray method etc. are mentioned. About the drying after application | coating, although the method of heat-processing and drying is preferable, heating temperature is 80-160 degreeC, More preferably, it is 100-140 degreeC.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to these Examples, unless the summary is exceeded. In the examples, parts and percentages indicating percentages are based on weight unless otherwise specified. In addition, various physical properties in the examples were evaluated by the following methods.

Evaluation of storage stability (evaluation of viscosity stability over time)
After preparing the fiber processing composition, the viscosity immediately after the preparation and the viscosity in a stationary state after being stored at 50 ° C. for 7 days were measured with a BM viscometer (No. 4 rotor, 12 rpm). The viscosity difference was calculated using the viscosity immediately after the preparation and the static viscosity over time, and the change rate (%) of the viscosity difference with respect to the viscosity immediately after the preparation was compared. When the rate of change in viscosity exceeded + 25%, it was judged as ◯, and when it exceeded + 25%, x was judged.

Blister Evaluation After applying 900g / m2 (wet) of the fiber processing composition foamed twice with a hand mixer to the back of the polyester tuft carpet base fabric, it is dried for 5 minutes in a hot air dryer set at 200 ° C. I let you.
Blisters such as blisters and cracks generated on the coated surface were visually evaluated from 5 points (excellent: no blisters were generated) to 1 point (poor: blisters were generated on the entire surface).
Moreover, in Example 9, the blister was visually evaluated in the same manner as described above for the product processed with the actual machine.

Evaluation of pulling-out strength It measured by the method based on JISL1021-8 (Fiber floor covering test method-Part 8: Pull-out strength test method of pile yarn).

Evaluation of Stickiness The processed fiber product was processed into a 1 cm wide strip, and the coated surface was folded in a valley and a pressure of 50 ° C. × 0.2 MPa × 1 minute was applied to an area of 1 cm × 1 cm with a press. The degree of stickiness when the pressure-bonding surface was peeled off was determined with the naked eye, and was relatively evaluated from 5 points (excellent: less sticky) to 1 point (poor: more sticky).

(Examples 1-9 and Comparative Examples 1-10)
Preparation of copolymer latex A pressure-resistant polymerization reactor was charged with 120 parts of polymerization water, 0.9 part of potassium persulfate and 0.3 part of sodium dodecylbenzenesulfonate with respect to 100 parts of all monomers, and stirred sufficiently. Thereafter, each monomer shown in Table 1, 0.2 part of t-dodecyl mercaptan, and 2 parts of cyclohexene were added and polymerization was started at 70 ° C., and the polymerization was completed when the final polymerization conversion rate exceeded 95%. did.
Subsequently, these copolymer latexes were adjusted to pH 8 with sodium hydroxide, and unreacted monomers and other low-boiling compounds were removed by steam distillation to obtain copolymer latexes A to G.

According to the coating formulation shown in Table 2, 100 parts by weight of copolymer latex A, 1 part by weight of Neugen LF-80X (cloud point 57 ° C., manufactured by Daiichi Kogyo Seiyaku) as a nonionic surfactant, and as an inorganic filler 400 parts by weight of calcium carbonate SS # 30 (manufactured by Nitto Flour Chemical), 0.3 parts by weight of Aron T-50 (manufactured by Toagosei) as a dispersant, Neoperex G-25 (manufactured by Kao) as a foaming agent 0.5 parts by weight, IX-1177 (Daiichi Kogyo Seiyaku) as a thickener and 2.5 parts by weight of a predetermined amount of water, and finally AZ coat 5800MT (manufactured by San Nopco) as zirconium ammonium carbonate. The composition of this invention was produced by mix | blending 2 weight part.
This composition is foamed with a hand mixer to a foaming ratio of 2 times, applied to the back of a polyester tuft carpet using a coating bar to an application amount of 900 g / m 2 (wet), and then dried at 140 ° C. for 15 minutes. To obtain a fiber processed product.

  A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex B was used instead of the copolymer latex A used in Example 1.

  A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex C was used instead of the copolymer latex A used in Example 1.

  In the same manner as in Example 1 except that Neugen LF-100X (cloud point 73 ° C., manufactured by Daiichi Kogyo Seiyaku) was used instead of the nonionic surfactant Neugen LF-80X used in Example 1. A textile processed product was obtained.

  The composition and fiber were the same as in Example 1 except that the amount of nonionic surfactant used in Example 1 was 3 parts by weight and the amount of ammonium zirconium carbonate was 1.5 parts by weight. A processed product was obtained.

  The composition and the processed fiber product were the same as in Example 1 except that the amount of the nonionic surfactant used in Example 1 was 1 part by weight and the amount of ammonium zirconium carbonate was 2 parts by weight. Got.

  The composition was the same as in Example 1 except that the amount of nonionic surfactant used in Example 1 was 2.5 parts by weight and the amount of ammonium zirconium carbonate was 0.1 parts by weight. And got a fiber processed product.

  The composition is the same as in Example 1 except that the amount of nonionic surfactant used in Example 1 is 0.5 parts by weight and the amount of ammonium zirconium carbonate is 0.1 parts by weight. And got a fiber processed product.

  100 parts by weight of copolymer latex A, 1 part by weight of Neugen LF-80X (cloud point 57 ° C., manufactured by Daiichi Kogyo Seiyaku) as a nonionic surfactant, SS # 30 of calcium carbonate as an inorganic filler (Nitto flour) 400 parts by weight of Chemical Industries), 0.3 parts by weight of Aron T-50 (manufactured by Toagosei) as a dispersant, 0.5 parts by weight of Neoperex G-25 (manufactured by Kao) as a foaming agent, thickening IX-1177 (Daiichi Kogyo Seiyaku Co., Ltd.) as an agent, 2.5 parts by weight of water and a predetermined amount of water, and ammonium carbonate (AZ Coat 5800MT, manufactured by San Nopco) 0. 3 parts by weight were added at an active ingredient concentration of 15%. This composition was applied to the back surface of a polyester tuft carpet with a roll coater so as to have an application amount of 900 g / m 2 (wet), and then dried at 140 ° C. for 5 minutes to obtain a fiber processed product.

(Comparative Example 1)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex D was used instead of the copolymer latex A used in Example 1.

(Comparative Example 2)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex E was used instead of the copolymer latex A used in Example 1.

(Comparative Example 3)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex F was used instead of the copolymer latex A used in Example 1.

(Comparative Example 4)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the copolymer latex G was used instead of the copolymer latex A used in Example 1.

(Comparative Example 5)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that Emulgen 108 (cloud point: 40 ° C., manufactured by Kao) was used instead of the nonionic surfactant Neugen LF-80X used in Example 1. It was.

(Comparative Example 6)
A composition and a processed fiber product were obtained in the same manner as in Example 1, except that Emulgen 120 (cloud point: 98 ° C., manufactured by Kao) was used instead of the nonionic surfactant Neugen LF-80X used in Example 1. It was.

(Comparative Example 7)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the amount of the nonionic surfactant used in Example 1 was 0.3 parts by weight.

(Comparative Example 8)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the amount of the nonionic surfactant used in Example 1 was 4 parts by weight.

(Comparative Example 9)
A composition and a processed fiber product were obtained in the same manner as in Example 1 except that the compounding amount of ammonium zirconium carbonate used in Example 1 was 0.05 parts by weight.

(Comparative Example 10)
A composition and a fiber processed product were obtained in the same manner as in Example 1 except that the amount of zirconium carbonate used in Example 1 was 3 parts by weight.

  From the results in Table 3, since Comparative Example 1 used a copolymer latex having a Tg lower than the range of the present invention, the stickiness of the fiber processed product was greatly inferior. In Comparative Example 2, the removal strength of the copolymer latex fiber processed product having a Tg higher than the range of the present invention was greatly inferior.

Since Comparative Example 3 used a copolymer latex using more ethylenically unsaturated carboxylic acid monomer than the range of the present invention, the viscosity stability of the composition was inferior and the blister resistance was inferior.
Since Comparative Example 4 used a copolymer latex using less ethylenically unsaturated carboxylic acid monomer than the range of the present invention, the viscosity stability of the composition was greatly inferior.

Since Comparative Example 5 used a nonionic surfactant having a cloud point lower than the range of the present invention, the viscosity stability of the composition was inferior and the blister resistance was inferior.
Since the comparative example 6 used the nonionic surfactant with a cloud point higher than the range of this invention, its blister resistance was inferior.

In Comparative Example 7, since the blending amount of the nonionic surfactant was smaller than the range of the present invention, the viscosity stability of the composition was inferior.
In Comparative Example 8, since the blending amount of the nonionic surfactant was larger than the range of the present invention, the blister resistance was inferior.

In Comparative Example 9, since the blending amount of ammonium zirconium carbonate was less than the range of the present invention, the blister resistance was greatly inferior.
In Comparative Example 10, since the amount of ammonium zirconium carbonate was larger than the range of the present invention, the viscosity stability of the composition was greatly inferior.

According to the present invention, there is obtained a fiber processing composition that is free from blisters during the drying process during production and is excellent in storage stability. Further, by applying the composition by the production method of the present invention, It is possible to stably provide a fiber processed product that is excellent in mold retainability and does not generate formalin.

1 Compounding material tank 2 Zirconium compound tank 3 Pump 4 Air compressor 5 Air flow meter 6 Back pressure valve 7 Mixing head 8 Motor

Claims (2)

(A) 25 to 55% by weight of aliphatic conjugated diene monomer, 0.5 to 4% by weight of ethylenically unsaturated carboxylic acid monomer, and 41 to 74.5% by weight of other copolymerizable monomers (B) Cloud point is 50 to 80 ° C. with respect to 100 parts by weight (in terms of solid content) of a copolymer latex having at least one glass transition temperature obtained by emulsion polymerization of -50 to 30 ° C. Fiber processing characterized by containing 0.5 to 3 parts by weight of a nonionic surfactant in the range of 0.1 to 2 parts by weight of (c) a zirconium-based compound and not containing a formalin-derived substance. Composition. In producing a fiber processed product obtained by applying the fiber processing composition according to claim 1 to a fiber base material, (c) zirconium in a mixer provided immediately before the coating treatment step of the composition A method for producing a processed fiber product, comprising adding a part or all of a system compound.