CN105247132A - Water-dispersed resin composition - Google Patents

Abstract

An object of the present invention is to provide a water-dispersed resin composition for a fiber article, having excellent adhesion and coating property, as well having less odor. The present invention relates to a water-dispersed resin composition for a fiber article comprising: (A) an aqueous resin emulsion and (B) an amino alcohol.

Description

Water Dispersible Resin Composition

technical field

The present invention relates to a water-dispersed resin composition. More specifically, the present invention relates to water-dispersible resin compositions to be applied to fibrous articles.

Background technique

In view of improving the properties of fiber products, fiber processing agents have been applied to fiber products to improve hygiene-related properties such as odor and anti-fouling properties; to enhance physical properties such as durability and strength; and to improve appearance such as texture and touch. One of the fibrous products requiring various improvements includes hygienic materials such as paper diapers, incontinence pads, sanitary napkins, pet pads, hospital gowns, surgical white coats, sheets, aprons, white coats, surgical gowns, Surgical gloves and masks. Among these hygienic materials mentioned above, paper diapers, incontinence pads, sanitary napkins and the like, which are called absorbent products, are composed of a nonwoven fabric as a fibrous product with a moisture absorber and additionally a polymer sheet.

In general, an absorbent article has a structure in which a water absorbing agent (hereinafter, "moisture" refers to general water such as distilled water and ion-exchanged water herein, which may contain salt, solid components, etc., particularly, such as Body fluids such as urine and blood) are covered, for example, with paper, a part of which is bonded with a hot-melt adhesive or the like, and placed between a breathable polymer sheet and an impermeable non-woven fabric that will come into direct contact with the wearer's skin. between things.

These absorbent articles are required to have properties such as desirable hygienic desirability, high water absorption and high water retention. The water absorbing agent is usually a thin fiber assembly made of pulp. The fiber aggregate contains a water-absorbing polymer capable of absorbing and retaining a large amount of water as necessary.

However, such water-absorbing agents do not have sufficient mechanical strength in the case where a large amount of moisture is absorbed. Thus, the absorbent's own weight deforms the shape of the absorbent, thus breaking the absorbent; inside the absorbent article, the absorbent is displaced between the breathable polymer sheet and the nonwoven. As a result, a deviation in the distribution of the water-absorbing agent is caused inside the absorbent article, creating a problem that the absorbent article cannot sufficiently absorb moisture, resulting in leakage.

In order to solve this problem, Patent Document 1 describes a method of reducing offset of a water-absorbing agent by discharging hot-melt adhesives in the form of fibers and overlapping plural kinds of hot-melt adhesives. However, this method cannot completely prevent the offset of the water-absorbing agent.

Patent Document 2 discloses that fibers are firmly bonded with an aqueous emulsion instead of a hot-melt adhesive to form a fiber aggregate in which the fibers are bonded to each other with high strength to prevent distribution of a water-absorbing agent offset. However, in Patent Document 2, it is necessary to coat the fiber aggregate with a large amount of mist of the emulsion. In the case where a fiber aggregate has been coated with a large amount of emulsion, since drying of the fiber substrate takes time, the emulsion is not suitable for high-speed line coating, and it cannot be said that the emulsion is suitable for making fiber products. Furthermore, coating with large quantities of emulsions has posed problems. When applying a large amount of mist of the emulsion, the mist of the emulsion splashes, thereby deteriorating the working environment; furthermore, the emulsion adheres to objects other than the adherend, causing a possibility of polluting the production line. In addition, in consideration of the preparation of hygienic materials, it is not preferable to coat with a large amount of emulsion due to pungent odor. Coating with a smaller amount of emulsion prevents the emulsion from fully penetrating the fiber assembly. As a result, unevenness in bonding strength between fibers occurs, and offset of the water-absorbing agent cannot be completely prevented.

Citation

patent documents

Patent Document 1: Japanese Patent Laid-Open (Laid-Open) No. H03(1991)-37062

Patent Document 2: Japanese Patent Laid-Open No. 2001-172854

Contents of the invention

technical problem

The object of the present invention is to solve the above-mentioned problems, and to provide a water-dispersible resin composition having good coating properties on fibers and excellent bonding strength between fibers, which is also particularly not Has an odor and is suitable for the preparation of hygienic materials.

Technical solution for solving the above problems

In order to solve the above-mentioned problems, as a result of intensive studies, the present inventors have found that a water-dispersible resin composition containing (A) an aqueous resin emulsion and (B) an amino alcohol enables composite coating on fiber products, and in When it is uniformly applied to fibers in individual coatings, it strengthens the bonding between fibers, thereby completing the present invention. Therefore, in the fiber product containing the water-absorbent polymer, even if a large amount of water is absorbed, the offset of the water-absorbent polymer can be reduced.

The present invention and preferred embodiments of the present invention are as follows.

1. A water-dispersed resin composition for fiber products, comprising: (A) aqueous resin emulsion and (B) amino alcohol.

2. The water-dispersed resin composition according to item 1, wherein the (A) aqueous resin emulsion comprises a polymer of a compound having one or more (meth)acryloyl groups.

3. The water-dispersed resin composition according to the first or second item, wherein the (B) amino alcohol is an aliphatic alcohol having an amino group and having 1 to 10 carbon atoms.

4. The water-dispersed resin composition according to any one of the first item to the third item, wherein the (B) amino alcohol comprises CH ₃ -C(NH ₂ )(CH ₃ )CH ₂ -OH 2-Amino-2-methyl-1-propanol.

5. The water-dispersed resin composition according to any one of the first to fourth items, wherein the (A) aqueous resin emulsion comprises a polymer of monomers including a compound represented by the following formula (I):

CH ₂ =C(R ¹ )-COOR ² formula (I)

Wherein R1 represents ^a hydrogen atom or a methyl group, and R2 represents a ^hydrogen atom or an alkyl group.

6. The water-dispersed resin composition according to any one of the first to fifth items, wherein the (A) aqueous resin emulsion comprises a copolymer of methyl methacrylate, butyl acrylate and acrylic acid.

7. The water-dispersed resin composition according to any one of the first item to the sixth item, wherein the glass transition temperature of the solid component of the (A) aqueous resin emulsion is -50°C to 80°C.

8. The water-dispersed resin composition according to any one of items 1 to 7, wherein the water-dispersed resin composition is The product contains 0.1-3.0 parts by weight of the (B) amino alcohol.

9. The water-dispersed resin composition according to any one of the first to eighth items, wherein the pH of the composition is adjusted to 4.0-9.0.

10. The water-dispersed resin composition according to any one of the first to ninth items, which has a viscosity of 10 to 2,000 mPa·s (temperature: 30° C., solid component concentration: 45% by weight).

11. A hygienic material obtained by applying the water-dispersible resin composition according to any one of the first item to the tenth item to a fiber product.

Beneficial Effects of the Invention

Since the water-dispersed resin composition of the present invention contains (A) aqueous resin emulsion and (B) aminoalcohol, the composition has less odor, enables spot coating on fiber products, and can reinforce fibers (which is the adhesive strength between the adherends). When the water-dispersed resin composition of the present invention is applied to fibrous products constituting absorbent products such as paper diapers, the water-absorbing agent in the fibrous products is firmly held between fibers, thereby providing a water-absorbent product excellent in water absorption. Absorbent articles.

Description of drawings

[ Fig. 1] Fig. 1 is an exemplary cross-sectional view of main parts of an absorbent composite coated with the water-dispersed adhesive of the present invention.

detailed description

The water-dispersed resin composition according to the present invention contains (A) an aqueous resin emulsion and (B) an amino alcohol. Herein, in the present invention, the expression "comprising (A) aqueous resin emulsion and (B) aminoalcohol" means that some or all of these components may have reacted in the composition. The water-dispersed resin composition of the present invention is suitable for coating fiber products.

(A) Aqueous resin emulsion

In the present invention, (A) the aqueous resin emulsion is a dispersion liquid containing polymer microparticles (which is a dispersed body) and an aqueous medium (which is a dispersion medium). The polymer particles are dispersed in an aqueous medium to form an emulsion (milky liquid, cloudy substance). Hereinafter, (A) aqueous resin emulsion is sometimes simply referred to as "emulsion (A)" or "component (A)".

"Aqueous medium" herein refers to general water, such as tap water, distilled water, ion-exchanged water, but may include water-soluble or dispersible and mixed with the raw materials (for example, monomers) of the emulsion involved in the present invention. Poorly reactive organic solvents.

The aqueous resin emulsion used in the present invention may also contain water-soluble or dispersible monomers, oligomers, prepolymers and/or resins, etc., and may also contain emulsifiers, polymerizable emulsifiers, polymerization An initiator, a chain extender, and/or various additives, etc., are generally used when an aqueous resin or a water-soluble resin is prepared as described below.

(A) Examples of aqueous resin emulsions include, but are not particularly limited to, acrylic resin-based emulsions, vinyl acetate resin-based emulsions, vinyl chloride-vinyl acetate copolymer-based emulsions, styrene-butadiene copolymer-based emulsions, ethylene-acetic acid Vinyl ester copolymer emulsion, polyester resin emulsion, urethane resin emulsion, nylon resin emulsion and polyolefin emulsion. In addition, Related resources of voluntary standards for feminine hygiene products (the Japan Hygiene Products Industry Association published on October 10, H10 (1998)) and the like can be referred to. These (A) aqueous resin emulsions may be used alone or in combination of two or more, and may be prepared according to known methods. It should be noted that (A) aqueous resin emulsion having little or no odor is preferably used.

In the present invention, the (A) aqueous resin emulsion is preferably an acrylic resin-based emulsion containing an acrylic resin as a dispersed substance. Hereinafter, as an example of the (A) aqueous resin emulsion, an acrylic resin-based emulsion will be described, but it is not intended to limit it thereto in the present invention.

The acrylic resin emulsion preferably contains a polymer of monomers including (meth)acrylic acid and/or (meth)acrylic acid derivatives. It should be noted that acrylic acid and methacrylic acid are collectively referred to herein as "(meth)acrylic acid", and acrylic acid derivatives and methacrylic acid derivatives are collectively referred to as "(meth)acrylic acid derivatives."

(Meth)acrylic acid or a (meth)acrylic acid derivative is a compound having one or more (meth)acryloyl groups, and may have two or more (meth)acryloyl groups.

In the present invention, the (A) aqueous resin emulsion preferably contains a polymer including monomers of (meth)acrylic acid and/or (meth)acrylic acid derivatives represented by the following formula (I) as a polymer having one or more ( Meth)acryloyl compounds:

CH ₂ =C(R ¹ )-COOR ² formula (I)

Wherein R1 represents ^a hydrogen atom or a methyl group, and R2 represents a ^hydrogen atom or a functional group other than a hydrogen atom.

In the case where R in the above ^formula (I) is a hydrogen atom, the compound represented by the formula (I) is (meth)acrylic acid, and in the case where R is a functional group other ^than a hydrogen atom, the formula ( I) is a (meth)acrylic acid derivative.

In formula (I), R ² is preferably (but not particularly limited to) a hydrogen atom or an alkyl group. In the present invention, it is more preferable that (A) the aqueous resin emulsion contains a polymer comprising a monomer of (meth)acrylic acid (ie, R ² is a hydrogen atom) in view of component (B) described below.

In formula (I), where R ² is an alkyl group, the alkyl group may be chain or cyclic, and may be linear or branched. The alkanyl group preferably has 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms. The cycloalkyl group preferably has 3-8 carbon atoms, more preferably 3-6 carbon atoms.

In ^formula (I), when R is an alkyl group, examples of R include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, hexyl, ² -ethyl ylhexyl, heptyl, octyl, nonyl, isononyl, decyl, lauryl, myristyl and hexadecyl. Where R ² is cycloalkyl, examples of R ² include cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.

The "(meth)acrylic acid derivative" is preferably an alkyl (meth)acrylate. Specifically, examples include methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, (meth)acrylate base) isobutyl acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, (meth)acrylic acid Isooctyl, n-nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, myristyl (meth)acrylate and (meth) ) cetyl acrylate. Among these, n-butyl acrylate, 2-ethylhexyl acrylate, and methyl methacrylate are more preferable.

In addition, other examples of "(meth)acrylic acid derivatives" that can be used in the present invention include (meth)acrylates having OH groups such as 2-hydroxyethyl (meth)acrylate and (meth) 2-Hydroxypropyl acrylate; diesters and monoesters obtained from (meth)acrylic acid and diols, such as polyethylene glycol mono(meth)acrylate, ethylene glycol di(meth)acrylate, diethylene glycol Glycol di(meth)acrylate, polypropylene glycol mono(meth)acrylate and acetoacetoxyethyl (meth)acrylate; (amide(meth)acrylate), such as (meth) ) acrylamide, N-methylolacrylamide and diacetone acrylamide; and (meth)acrylates with epoxy groups such as glycidyl methacrylate and 3,4-epoxy (meth)acrylate hexyl ester.

These (meth)acrylic acid and (meth)acrylic acid derivatives may be used alone or in combination of two or more.

In the case where the (A) aqueous resin emulsion contains a copolymer of n-butyl acrylate, acrylic acid and methyl methacrylate, the water-dispersible resin composition of the present invention will have a small odor and have a good appearance on fiber products. Coating properties, and more suitable for hygienic material (absorbent articles) applications.

Furthermore, in the present invention, in the preparation of the (A) aqueous resin emulsion, other copolymerizable monomers may be used alone or in combination with (meth)acrylic acid and/or (meth)acrylic acid derivatives in two or more combination of species. In this case, (meth)acrylic acid and (meth)acrylic acid derivatives (if both are contained together, then the total amount) is preferably 80% by weight or more inclusive of 100% by weight.

Examples of such "other copolymerizable monomers" include monomers having vinylic double bonds and containing carboxyl groups or acid anhydrides, such as crotonic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, and maleic anhydride ; monomers having vinyl double bonds and containing chlorine or cyano groups, such as vinyl chloride and acrylonitrile; vinyl carboxylates, such as vinyl acetate, vinyl propionate, tert-butyl vinyl ester and vinylversatate ); aromatic vinyl monomers such as styrene; silicon-containing monomers having vinylic double bonds such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltripropoxysilane, ethylene Vinyltriisopropoxysilane, Vinylmethyldiethoxysilane, Vinylmethyldipropoxysilane, Vinyltris(β-methoxyethoxy)silane, Vinyltriacetoxysilane , γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, γ-methacryloxypropyltripropoxysilane, γ- Methacryloxypropylmethyldimethoxysilane and γ-methacryloxypropyltris(isopropoxy)silane.

(A) Examples of a preparation method of an aqueous resin emulsion include a usual emulsion polymerization method (see Chemistry of Polymer Latex, written by Soichi Muroi, pp. 51-54, Kobunshi Kankokai, published in 1970) and a forced emulsifying method (forced emulsifying method) (see Japanese Patent Publication No. H6-102748). In addition, commercially available emulsions can also be used as (A) aqueous resin emulsion.

The (A) aqueous resin emulsion according to the present invention can be obtained by a known emulsion polymerization method by using, for example, the aforementioned (meth)acrylic acid and/or (meth)acrylic acid derivatives and other copolymerizable monomers as needed. "Emulsion polymerization" means free radical polymerization in an aqueous medium using an emulsifying agent. Emulsions (A) according to the invention can be obtained according to known methods of emulsion polymerization.

In the case of emulsion polymerization of (meth)acrylic acid and/or (meth)acrylic acid derivatives, examples of the emulsion polymerization method may include:

(i) a method for adding (meth)acrylic acid and/or (meth)acrylic acid derivatives and emulsifiers to an aqueous medium and polymerizing,

(ii) a method for continuously or intermittently dropping (meth)acrylic acid and/or a (meth)acrylic acid derivative and an emulsifier into an aqueous medium and polymerizing them, and

(iii) A method for adding (meth)acrylic acid and/or (meth)acrylic acid derivatives and an emulsifier to water to prepare an emulsion, wherein the (meth)acrylic acid and/or (meth)acrylic acid The derivative and emulsifier are dripped continuously or intermittently into the aqueous medium, thereby polymerizing the liquid.

"Emulsifiers" having the ability to emulsify monomers form micelles in the emulsion polymerization process in order to provide monomers with sites for polymerization and facilitate particle dispersion stability. Examples of the emulsifier include anionic surfactants, nonionic surfactants, polymeric surfactants, and "reactive surfactants" having a radically polymerizable double bond in one emulsifier molecule.

Examples of the "anionic surfactant" include:

Alkali metal alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate;

Sodium Lauryl Polyethylene Glycol Ether Sulfate;

Alkyl ammonium sulfates such as ammonium lauryl sulfate;

sodium sulfonate;

Alkylsulfonates, such as alkali metal salts of sulfonated paraffins and ammonium salts of sulfonated paraffins;

Fatty acid salts, such as sodium laurate, triethanolamine oleate and triethanolamine abietate;

Alkylarylsulfonates such as sodium dodecylbenzenesulfonate and alkali metal sulfates of alkaliphenolhydroxyethylene;

Higher alkyl naphthalene sulfonate;

Naphthalenesulfonate-formaldehyde condensate;

Dialkyl sulfosuccinates;

polyoxyethylene alkyl sulfate; and

Polyoxyethylene alkyl aryl sulfate.

Examples of the "nonionic surfactant" include:

Polyoxyethylene alkyl ether;

Polyoxyethylene alkyl aryl ether;

Sorbitan fatty acid ester;

Polyoxyethylene sorbitan fatty acid ester;

Fatty acid monoglycerides, such as glycerol monolaurate;

Polyoxyethylene-polyoxypropylene copolymer (polyoxyethylene-oxypropylenecopolymer); and

Condensation products of ethylene oxide with aliphatic amines, amides or acids.

Examples of the "polymer surfactant" include polyvinyl alcohol.

Examples of the "reactive surfactant" include sulfate ester salts of polyoxyethylene allyl glycidyl nonylphenyl ether (ADEKAREASOAPSE series (trade name), manufactured by Asahi Denka Co., Ltd.), α-sulfo Ammonium salt of -ω-(1-(alkoxy)methyl-2-(2-propenyloxy)ethoxy)-poly(oxo-1,2-ethylenediyl) (ADEKAREASOAPSR series (trade name ), manufactured by AsahiDenka Co., Ltd.), polyoxyethylene (or alkenyl) alkyl (or alkenyl) ether sulfate ammonium salt (PD series (trade name), manufactured by Kao Corporation), sulfosuccinate type Reactive active agent (LATEMUL180 series (trade name), manufactured by Kao Corporation), alkylallyl sulfosuccinic acid sodium salt (EleminolJS-20 (trade name), manufactured by Sanyo Chemical Industries, Ltd.), polyoxyethylene nonyl Propylene phenyl ether sulfate ammonium salt (AQUARONHS series (trade name), manufactured by Dai-IchiKogyoSeiyaku Co., Ltd.), polyoxyethylene-1-(allyloxymethyl) alkyl ether sulfate ammonium salt ( AQUARONKH series (trade name), manufactured by Dai-IchiKogyoSeiyaku Co., Ltd.), polyoxyethylene allyl glycidyl nonylphenyl ether (ADEKAREASOAPNE series (trade name), manufactured by Asahi Denka Co., Ltd.), polyoxyethylene Ethylene nonylpropenyl ether (AQUARONRN series (trade name), manufactured by Dai-IchiKogyoSeiyaku Co., Ltd.) and α-hydrogen-ω-(1-(alkoxy)methyl-2-(propyleneoxy)ethyl Oxy)-poly(oxo-1,2-ethylenediyl) (ADEKAREASOAPER series (trade name), manufactured by Asahi Denka Co., Ltd.).

In addition, chain transfer agents can be used to adjust the molecular weight of acrylic polymers obtained by free radical polymerization. Examples of "chain transfer agents" include mercaptoethanol, thioglycerol, thioglycolic acid, octyl thioglycolate, methyl mercaptopropionate, and n-dodecanethiol.

In addition, the pH of the emulsion (A) is preferably adjusted by adding a base after the emulsion polymerization, if necessary. The pH of the emulsion is preferably adjusted to 4.0-9.0, more preferably 6.0-9.0, particularly preferably 6.5-8.5. It should be noted that pH can be measured with a pH meter. Because of having a pH within the above range, the water-dispersed resin composition of the present invention will have less odor and become suitable for the production of sanitary materials.

Examples of bases used to adjust the pH of the emulsion after emulsion polymerization include hydroxides and carbonates of alkali metals such as sodium, potassium and lithium; hydroxides and carbonates of alkaline earth metals such as magnesium and calcium; ammonia and amines such as alkylamines, allylamines and aminoalcohols; and these substances may be used alone or in combination of two or more. It should be noted that in the present invention, the base for adjusting the pH is not contained in the components constituting the (A) aqueous resin emulsion. In addition, aminoalcohol used as a pH adjuster is contained in component (B).

(A) The glass transition temperature (hereinafter also referred to as "Tg") of the solid component of the aqueous resin emulsion is preferably -50°C to 80°C or less, more preferably -40°C to 60°C, most preferably -30°C to 60°C. When the Tg of the solid component of the emulsion (A) is within the above range, the adhesion between fibers constituting the fiber product is enhanced. Herein, the solid component of the emulsion (A) refers to a solid component obtained by drying the emulsion (A) at 105° C. for 3 hours.

Herein, the Tg of the (A) aqueous resin emulsion is calculated from the Tg of the monomer which will be the raw material of the emulsion (A). The mixing ratio (parts by weight) of each monomer is determined in consideration of the glass transition temperature (hereinafter also referred to as "Tg of homopolymer") of a homopolymer obtained when each monomer is polymerized alone. Specifically, the Tg of the emulsion (A) can be calculated by using formula (1):

1/Tg＝C ₁ /Tg ₁ +C ₂ /Tg ₂ +...+C _n /Tg _n (1)

Wherein Tg is the theoretical Tg of the copolymer, C _n is the weight ratio of the nth monomer n contained in the monomer mixture, Tg _n is the Tg of the homopolymer of the nth monomer n, and n is positive An integer that is the number of the monomers that make up the copolymer.

As the Tg of the homopolymer of the monomer, values listed in literature can be used. Examples of such literature include "POLYMER HANDBOOK" (4th edition; published by John Wiley & Sons, Inc.). As an example, Tg values for homopolymers of the monomers listed in the POLYMER HANDBOOK are shown below.

Methyl methacrylate (hereinafter referred to as "MMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=105°C)

n-Butyl acrylate (hereinafter referred to as "n-BA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=-56°C)

2-Ethylhexyl acrylate (hereinafter referred to as "2EHA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=-70°C)

Cyclohexyl methacrylate (hereinafter referred to as "CHMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=66°C)

Acrylic acid (hereinafter referred to as "AA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=106°C)

Methacrylic acid (hereinafter referred to as "MAA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=130°C)

n-Butyl methacrylate (hereinafter referred to as "BMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg = 20°C)

Furthermore, in the present invention, in the component (A), the solid component concentration of the (A) aqueous resin emulsion is, but not particularly limited to, preferably 5% by weight to 70% by weight.

(B) Amino Alcohol

In the present invention, (B) amino alcohol refers to a compound having one or more amino groups and one or more alcoholic hydroxyl groups. Herein, "alcoholic hydroxyl group" refers to a hydroxyl group bonded to a carbon atom of an aliphatic hydrocarbon. It should be noted here that the (B) aminoalcohol can be described as "component (B)".

(B) The amino alcohol may have two or more amino groups per molecule, and preferably has one or two amino groups. Furthermore, the amino groups may be primary, secondary and tertiary. In addition, the (B) amino alcohol may have two or more alcoholic hydroxyl groups per molecule, and, for example, preferably has one to three alcoholic hydroxyl groups, and more preferably one or two alcoholic hydroxyl groups.

In the (B) aminoalcohol of the present invention, the nitrogen atom of the amino group and the alcoholic hydroxyl group are preferably bonded via an aliphatic group. More preferably, the aminoalcohol is a compound in which at least one hydrogen atom bonded to a carbon atom of an aliphatic alcohol is replaced by an amino group. More preferably, at least one of the hydrogen atoms of the aliphatic alcohol having 1 to 10 carbon atoms is substituted with an amino group.

Examples of the (B) aminoalcohol of the present invention include, but are not particularly limited to, compounds in which at least one hydrogen atom bonded to a carbon atom of an aliphatic alcohol is substituted with any of the following amino groups.

Examples include compounds substituted with:

Amino group represented by _-NH2 ; alkylamino group having a straight-chain, branched-chain or cyclic alkyl group having 1-10 carbon atoms, for example methylamino, ethylamino, propylamino, isopropylamino, butylamino, isopropylamino Butylamino, sec-butylamino and tert-butylamino;

Alkylamino having two linear, branched or cyclic alkyl groups having 1 to 10 carbon atoms, such as dimethylamino, methylethylamino, diethylamino and dipropylamino; and

Cyclic amino groups having one or more nitrogen atoms in the ring, such as pyrrolidinyl, pyrrolyl and imidazolyl.

Furthermore, in the present invention, among (B) amino alcohols, preferably aliphatic alcohols having 1 to 10 carbon atoms and more preferably linear, branched or cyclic aliphatic alcohols having 1 to 8 carbon atoms At least one of the hydrogen atoms is preferably substituted by the above-mentioned amino group.

Examples of aliphatic alcohols having 1 to 10 carbon atoms include linear, branched or cyclic aliphatic alcohols such as methanol, ethanol, propanol, isopropanol, butanol, tert-butanol, pentanol, 3- Methylbutanol, 2,2-dimethylpropanol, 3-methyl-2-butanol, 2-ethylhexanol, nonanol, decanol, and cyclohexanol.

Furthermore, the (B) aminoalcohol used in the present invention may have a structure in which two or three hydroxyalkyl groups having one or more alcoholic hydroxyl groups are bonded to the nitrogen atom of one amino group. In this case, the hydroxyalkyl group having one or more alcoholic hydroxyl groups preferably has 1 to 10 carbon atoms.

Alternatively, in (B) the amino alcohol, the hydrogen atom of the amino group of the aliphatic alcohol substituted with the above amino group may be further substituted with an alkylamino group, and the hydrogen atom of the alkylamino group may be further substituted with a hydroxyalkyl group.

Aliphatic alcohols having 1-10 carbon atoms are readily miscible in aqueous media. Therefore, when (B) aminoalcohol has the structure based on the aliphatic alcohol having 1-10 carbon atoms, (A) water-containing resin emulsion and (B) aminoalcohol are easily mixed, and the water dispersion type resin composition of the present invention Neutralization results in less odor and, moreover, the coating properties on fibrous products are improved.

(B) Specific examples of amino alcohols include N,N-dimethylethanolamine, N,N-diethylethanolamine, N,N-dibutylethanolamine, N-(β-aminoethyl)ethanolamine, N-methylethanolamine, Base ethanolamine, N-methyldiethanolamine, N-ethylethanolamine, N-ethyldiethanolamine, N-n-butylethanolamine, N-n-butyldiethanolamine, N-tert-butylethanolamine, N-tert-butyl Diethanolamine, N-(β-aminoethyl)isopropanolamine, N,N-diethylisopropanolamine, 2-amino-2-methyl-1-propanol, 2-methylamino-2 - Methyl-1-propanol, 2-amino-2-hydroxymethyl-1,3-propanediol and aminomethylpropanediol. Amino alcohols may be used alone or in combination of two or more.

In the present invention, (B) amino alcohol preferably contains 2-amino-2-methyl-1-propanol represented by the following formula (b1), and more preferably 2-amino-2-methyl-1-propanol Mixture of alcohol with 2-methylamino-2-methyl-1-propanol. With respect to the total weight of the mixture of 100 parts by weight of 2-amino-2-methyl-1-propanol and 2-methylamino-2-methyl-1-propanol, it is more desirable to use a compound containing 3-97 parts by weight A mixture of 2-amino-2-methyl-1-propanol.

CH ₃ -C(NH ₂ )(CH ₃ )CH ₂ -OH formula (b1)

The water-dispersed resin composition of the present invention contains (B) aminoalcohol, thereby enabling composite coating, such as uniform coating of fiber articles by, for example, spot coating, which has been the case with conventional emulsion coatings Difficult, and can enhance the bond between fibers. In the case of making an absorbent product using such a fibrous product, since the water-absorbing agent can be retained in the absorbent product without displacement, the water-dispersible resin composition of the present invention is preferably used for absorbent product applications. These effects will be more easily achieved when 2-amino-2-methyl-1-propanol is included as (B) aminoalcohol.

In the present invention, in the case where the compound contained in the (A) aqueous resin emulsion contains a carboxyl group (—COOH), the (B) amino alcohol undergoes a neutralization reaction with the carboxyl group to combine the water-dispersible resin remains near neutral. Therefore, the water-dispersed resin composition of the present invention will have less odor, and is preferable for various fiber products, especially hygienic material applications.

(Water-dispersed resin composition)

The water dispersion type resin composition of this invention contains (A) aqueous resin emulsion and (B) amino alcohol. Relative to 100 parts by weight of the solid component of component (A), the water-dispersible resin composition of the present invention preferably contains 0.1-3.0 parts by weight, more preferably 0.5-3.0 parts by weight, and even more preferably 0.5-2.0 parts by weight of Component (B). Since the weight ratio of component (B) is within the above range, the water-dispersed resin composition of the present invention has less odor, is easy to realize composite coating on fiber products, and maintains strong bonding strength between fibers.

Herein, the "solid component" of the (A) aqueous resin emulsion refers to the residue obtained by heating the (A) component at 105° C. for 3 hours. It should be noted that the above-mentioned number of parts by weight of (B) aminoalcohol refers to component (B) itself (free of moisture and impurities).

The water-dispersed resin composition of the present invention may further contain tackifier resins, plasticizers, defoamers, thickeners, waxes, preservatives, and colorants as additives, as needed and if appropriate. These additives may be mixed after mixing component (A) and component (B), or may be mixed in either component (A) or component (B) in advance.

Examples of "tackifier resins" include rosin-based resins, terpene resins, terpene-phenol-based resins, coumarone-indene resins, and petroleum-based hydrocarbon resins.

Examples of rosin-based resins include rosin esters and rosinols.

The tackifier resin may be commercially available, and examples include SUPERESTERE-730-55, SUPERESTERE-720, SUPERESTER786-60, SUPERESTERE-650, SUPERESTERE-865, TAMANOLE-200, TAMANOLE-100, and AM-1002 ( manufactured by ARAKAWA CHEMICAL INDUSTRIES, LTD.); and HARIESTER DS-70E, HARIESTERSK-70D, HARIESTERSK-90D-55, HARIESTERSK-508H, HARIESTERSK-816E and HARIESTER822E. All listed names are trade names.

In addition, in recent years, toluene- and xylene-free tackifier resins and solvent-free tackifier resins are preferably used from the standpoint of enhancing environmental awareness. Examples of such tackifier resins include SUPERESTERE-865NT, SUPERESTERE-625NT, SUPERESTERNS-100H, SUPERESTERNS-121, and TAMANOLE-200NT (manufactured by ARAKAWA CHEMICAL INDUSTRIES, LTD.); HARIESTERSK-501NS and HARIESTERSK-385NS. All listed names are trade names.

Examples of the "plasticizer" include glycerin; polyhydric alcohols such as ethylene glycol and propylene glycol; polyesters such as adipic acid-based, benzoic acid-based, acetylcitric acid-based, alkylsulfonic acid-based and Polyesters of phthalic acid; sugars such as sucrose and sorbitol; and organic solvents such as cellosolve.

Examples of the "defoamer" include:

Silicone-based defoamers such as dimethyl polysiloxane, polyoxyalkylene-modified silicones, organo-modified polysiloxanes, and fluorosilicone;

Fatty defoamers, such as castor oil, sesame oil, linseed oil, and animal and vegetable oils;

Fatty acid defoamers such as stearic acid, oleic acid and palmitic acid;

Fatty acid ester defoamers such as isoamyl stearate, diethylene glycol monolaurate, distearylsuccinate, distearic acid, sorbitan monolaurate, glycerin fatty acid esters, polyoxyethylene sorbitan, butylstearate monolaurate, sucrose fatty acid esters, ethylacetate alkylesters of sulfonated ricinoleic acid, and natural waxes;

Alcohol defoamers, such as polyoxyalkylene glycols and their derivatives, polyoxyalkylene alcohol hydrates, dipentylphenoxyethanol, 3-heptanol and 2-ethylhexanol;

Ether defoamers such as 3-heptyl cellosolve and nonyl cellosolve-3-heptyl carbitol;

Phosphate defoamers such as tributyl phosphate, sodium octyl phosphate and tris(butoxyethyl) phosphate;

Amine defoamers, such as dipentylamine;

Amide defoamers such as polyalkylene amides, acylated polyamines and dioctadecanoylpiperidine;

Metallic soap defoamers such as aluminum stearate, calcium stearate, potassium oleate and calcium salt of lanolin;

Sulfonate defoamers such as sodium lauryl sulfonate and sodium lauryl sulfonate; and

Hydrophobic silica-based defoamers; and mineral oil-based defoamers.

When preparing the water-dispersed resin composition of the present invention, in addition to component (A) and component (B), if necessary, the above-mentioned additives are preferably mixed. "Mixing" is a method generally used for mixing resin compositions, and is not particularly limited as long as the water-dispersible resin composition according to the present invention can be obtained by the method.

The pH of the water-dispersed resin composition of the present invention is preferably adjusted to 4.0-9.0, more preferably 6.0-9.0, particularly preferably 6.5-8.5. It should be noted that pH can be measured with a pH meter. Because of having a pH within the above-mentioned range, the water-dispersed resin composition of the present invention will have less odor and become suitable for producing sanitary materials.

The viscosity (30°C, solid component concentration: 45% by weight) of the water-dispersed resin composition of the present invention obtained as described above is preferably 10 to 2,000 mPa·s, more preferably 10-1,800 mPa·s, particularly preferably 20-1,500 mPa·s. Since the viscosity is within the above range, the water-dispersed resin composition of the present invention can more easily perform composite coating on fiber products, such as spot coating and uniform coating between fibers.

As a solid component, the amount of the water-dispersible resin composition coated on the fiber product is preferably 5-100 g/m ² , more preferably 5-50 g/m ² , particularly preferably 10-20 g/m ² . Herein, the solid component of the water-dispersible resin composition refers to a solid component obtained by drying the water-dispersible resin composition at 105° C. for 3 hours. Examples of coating methods that can be performed with the water-dispersed resin composition of the present invention include spiral coating, dot coating, and ZIP coating, in addition to the common emulsion coating method "mist coating", which The method is the method used to apply the hot melt adhesive.

Examples of fibrous products herein include fabrics (such as textiles, knits or non- wovens), and tapes, ropes, and threads containing their fibers; therefore, the structure and shape of the fibers are not important. In addition to cellulosic fibers, examples include cellulosic fibers with synthetic fibers such as polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon 6 and nylon 66 ) and polyacrylonitrile) combined cloth (such as textiles, knits or nonwovens), and tape-like, rope-like and thread-like products containing their fibers; therefore, the structure and shape of the fiber products are not important.

In the case where the fiber product of the present invention contains cellulose fibers, it is also possible to use products that have been treated with sodium hydroxide or liquid ammonia to carry out the usual mercerizing treatment, and other products that have been treated with liquid ammonia after the mercerizing treatment, and dyed Articles, such as yarn-dyed, exhaust-dyed or fabric-printed articles. The fibrous article may be preheat-set when used with synthetic fibers represented by polyester, if desired.

A fiber product is coated with the water-dispersible resin composition according to the present invention, and subjected to a predetermined treatment, thereby obtaining a fiber product. Examples of fibrous articles include hygienic materials such as diapers, sanitary napkins, incontinence pads, bed sheets, lab coats, surgical gowns, surgical gloves, and masks; and

General merchandise and clothing such as aprons, hats, handkerchiefs, towels, curtains, pillowcases, shirts, blouses and lace products.

Among the above sanitary products, diapers, sanitary napkins, and incontinence pads contain water-absorbent resins in fiber products, and are called absorbent products. Fig. 1 is an exemplary cross-sectional view of a water-absorbent composite constituting an absorbent article.

As shown in FIG. 1 , the absorbent composite is composed of a nonwoven fabric 1 which is a fiber product, a water-absorbent polymer 2 and a water-dispersible resin composition 3 . The nonwoven 1 has a bulky structure in which a part of the water-absorbent polymer 2 is enclosed and the rest of the water-absorbent polymer 2 is exposed on the surface of the nonwoven substrate 1 . The fibers constituting the nonwoven fabric 1 are in contact with the surface of the water-absorbent polymer 2 in the form of a coating.

As shown in FIG. 1, the water-dispersed resin composition 3 covers the water-absorbent polymer 2 and fibers in contact with the water-absorbent polymer 2 from the outer surface, or attaches a nonwoven to the water-absorbent polymer, the water-absorbent The absorbent polymer 2 is retained within the absorbent composite.

Herein, the "absorbent polymer" refers to a polymer capable of absorbing and retaining a large amount of water. The polymer is not particularly limited as long as it is a polymer used as an absorbent polymer for hygienic materials.

Examples of the absorbent polymer include synthetic polymers such as polyacrylate, polyvinyl alcohol, and polyacrylamide; and natural polymers such as starch and cellulose. These substances may be used alone or in combination. Although such absorbent polymers can be produced by known methods, commercially available ones can also be used. Examples of commercially available polymers include AQUAKEEP (trade name) manufactured by Sumitomo Seika Chemicals Company Limited and SUNWET (trade name) manufactured by Sanyo Chemical Industries, Ltd.

In the present invention, the "absorbent polymer" is preferably added in an amount of 0.1-50 g, more preferably 1-20 g, particularly preferably 1-5 g, per 100 g of the fiber product. The "absorbent polymer" present in the fibrous product may be in the form of fibrous products normally used in water-absorbent composites. The form is not particularly limited as long as it is not a form that adversely affects the properties of the fiber product. For example, absorbent polymer in particulate form may be sprinkled on the fibrous product, absorbent polymer in granular or bulk form may be dispersed in the fibrous product, or sheets of absorbent polymer may be inserted into the fibrous product.

The (A) aqueous resin emulsion is applied on a fiber product so as to penetrate between fibers constituting the fiber product. It is believed that the resin obtained from the (A) aqueous resin emulsion that has been infiltrated strengthens the bonding between the fibers in the fibrous product. Therefore, the mechanical strength of the fiber product is increased, and the mechanical strength of the water-absorbent polymer is increased. However, even if the water-absorbing polymer absorbs moisture, this bond can continue to exist without being easily damaged. Therefore, the mechanical strength of the water-absorbing polymer after absorbing water will be improved.

The water-dispersible resin composition of the present invention is applied to a fiber product containing an absorbent polymer, followed by drying, thereby obtaining an absorbent composite. Contemplated absorbent articles can be made from such absorbent composites. Any drying method may be used without limitation as long as the method is a drying method that has been generally and conventionally used for removing moisture. Examples of the method include hot-air drying, reduced-pressure drying, and natural drying.

Example

Hereinafter, the embodiments of the present invention will be described in detail, but these embodiments are only some aspects of the present invention, and the present invention is not intended to be limited to these embodiments in any way.

The water-dispersed resin composition according to the present invention is prepared from (A) aqueous resin emulsion and (B) amino alcohol. Details of component (A) and component (B) are explained below.

(A) Aqueous resin emulsion (component (A))

The polymerizable monomer (a) as a raw material of component (A) is shown below. It should be noted that the homopolymer Tg of the polymerizable monomer (a) is a value calculated using the above theoretical calculation formula.

(a) Polymerizable monomer

(a1) Methyl methacrylate (hereinafter referred to as "MMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg = 105°C)

(a2) n-butyl acrylate (hereinafter referred to as "n-BA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=-56°C)

(a3) Acrylic acid (hereinafter referred to as "AA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=106°C)

(a4) Methacrylic acid (hereinafter referred to as "MAA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=130°C)

(a5) n-butyl methacrylate (hereinafter referred to as "BMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg = 20°C)

(a6) Cyclohexyl methacrylate (hereinafter referred to as "CHMA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=66°C)

(a7) 2-Ethylhexyl acrylate (hereinafter referred to as "2EHA") (manufactured by Wako Pure Chemical Industries, Ltd., Tg=-70°C)

(B) Amino Alcohol

(B1) AMP90 (85% by weight of 2-amino-2-methyl-1-propanol, 5% by weight of 2-methylamino-2-methyl-1-propanol, and 10% by weight of water ( Manufactured by TheDow Chemical Company))

(B2) N-MMA (N-methylethanolamine (manufactured by Wako Pure Chemical Industries, Ltd.))

(B3) N-MDA (N-methyldiethanolamine (manufactured by Wako Pure Chemical Industries, Ltd.))

(emulsifier)

EMULGEN1135S-70 (manufactured by Kao Corporation)

EMULGEN118B (manufactured by Kao Corporation)

(polymerization catalyst)

Sodium persulfate (sodium persulfate manufactured by MITSUBISHIGASCHEMICAL COMPANY, INC.).

<(A) Synthesis of Aqueous Resin Emulsion>

(A1) Aqueous resin emulsion

In the reactor equipped with stirrer, thermostat, reflux condenser, two drop tanks (drop tank), thermometer and nitrogen inlet pipe, add 80 parts by weight of distilled water, 0.7 parts by weight of EMULGEN1135S- prepared by Kao Corporation 70 (trade name) and 0.2 parts by weight of EMULGEN118B (trade name) manufactured by Kao Corporation, and, after replacing the inside of the system with nitrogen, heated to 75° C. while stirring. As shown in Table 1, 21 parts by weight of (a1) methyl methacrylate, 77 parts by weight of (a2) butyl acrylate, and 2 parts by weight of (a3) acrylic acid were uniformly mixed.

The obtained mixture of polymerizable monomers was added to a homogeneous solution consisting of 25 parts by weight of distilled water, 3.5 parts by weight of EMULGEN1135S-70, and 2.0 parts by weight of EMULGEN118B; and the resultant was stirred with a stirrer A pre-emulsion is thus prepared.

Further, an aqueous solution in which 0.3 parts by weight of sodium persulfate was dissolved in 6 parts by weight of distilled water was prepared as a polymerization catalyst. Within 4 hours, the above-mentioned prefabricated emulsion and the aqueous solution of the polymerization catalyst were respectively added dropwise into a separate dropping storage tank. After the dropwise addition, it was further stirred at 80° C. for 2 hours, cooled to room temperature, thereby obtaining an (A1) aqueous resin emulsion having a solid component concentration of 45% by weight.

Aqueous resin emulsions (A2) to (A4) were synthesized in the same manner as (A1) except for using the raw material monomers shown in Table 1. The composition of the polymerizable monomer (a) is shown in Table 1 for the synthesis of (A2)-(A4).

[Table 1]

(A) Aqueous resin emulsion (A1) (A2) (A3) (A4) Monomer (a) (a1) MMA (parts by weight) twenty one 78 19.5 20 (a2) BA (parts by weight) 77 20 77 30 (a3) AA (parts by weight) 2 2 3.5

(a4) MAA (parts by weight) 3 (a5) BMA (parts by weight) 10 (a6) CHMA (parts by weight) 10 (a7) 2EHA (parts by weight) 27 Tg(°C) -30 57 -30 -20 Solid content concentration (weight %) 45 45 45 45

<Preparation of Water-dispersed Resin Compositions of Examples and Comparative Examples>

Component (B) and other neutralizing agents (ethanol and ammonia water) were added to 100 parts by weight of (A) aqueous resin emulsion (based on solid components) to prepare a water-dispersed resin composition. The composition of each water-dispersed resin composition is shown in Table 2.

The viscosity of the compositions of the respective Examples and Comparative Examples having a solid component concentration of 45% by weight was measured at 30° C. using a B-type rotational viscometer.

[Table 2]

In the tables, the unit of the numerical values related to the water-dispersed resin composition (formulation) is parts by weight.

<Evaluation of water-dispersed resin composition>

On a fibrous product consisting of pulverized pulp of 15 cm x 15 cm x 0.5 cm (mass per unit area: 12 g), an absorbent polymer (AQUAKEEP (trade name), manufactured by Sumitomo Seika Chemicals Company Limited) was added in a weight ratio of 5 g per 100 g of the fibrous product Spread and spread evenly on a 15cm x 15cm fabric.

The water-dispersible resin compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were applied on fibers at a weight ratio of 10 g/m ² with a glue gun manufactured by HHS GmbH, respectively. The coated surface was covered with a 15 cm x 15 cm fabric, pressed with a 1 kg weight roller press, and left to stand in an environment of 23° C. and 40% RH for 1 hour to obtain a sample.

<Evaluation of Coating Properties>

The water-dispersible resin compositions of Examples and Comparative Examples were subjected to a discharge test in which they were discharged in an amount of 30 g/min using a glue gun manufactured by HHS GmbH. The output was measured every 10 minutes until 60 minutes had elapsed. The evaluation criteria are as follows:

○○: The difference from the initial discharge amount is 0% or more and less than 10%.

○: The difference from the initial discharge amount is 10% or more and less than 15%.

Δ: The difference from the initial discharge amount is 15% or more and less than 20%.

X: The difference from the initial discharge amount is 20% or more.

<Evaluation of Adhesion Properties>

1. Evaluate the adhesion characteristics when dry

The above-mentioned sample was cut into a width of 25 mm and a length of 145 mm. The fabric on the coated surface was peeled off by hand, and the weight of fibers bonded with the water-dispersed resin composition attached to the fabric was measured. The evaluation criteria are as follows:

×: The weight of the fiber is less than 0.2 g.

Δ: The weight of the fiber is 0.2 g or more and less than 0.4 g.

○: The weight of the fiber is 0.4 g or more and less than 0.6 g.

○○: The weight of the fiber is 0.6 g or more.

2. Evaluation of adhesion characteristics when wet

In the center of the above sample, 15 ml of artificial urine was dropped and left for 3 minutes. Then, the test piece was cut into a width of 25 mm and a length of 145 mm. The fabric on the coated surface was peeled off by hand, and the weight of fibers bonded with the water-dispersed resin composition attached to the fabric was measured. The evaluation criteria are as follows:

×: The weight of the fiber is less than 0.5 g.

Δ: The weight of the fiber is 0.5 g or more and less than 1.0 g.

○: The weight of the fiber is 1.0 g or more and less than 2.0 g.

○○: The weight of the fiber is 2.0 g or more.

<Evaluation of smell>

Odors of the water-dispersed resin compositions of Examples and Comparative Examples were olfactory evaluated by individuals.

x: A pungent smell is sensed.

△: Slight pungent odor was sensed.

◯: A faint smell is sensed.

○○: Odorless.

As shown in Table 2, the water-dispersed resin composition of the example (which contains two components of (A) aqueous resin emulsion and (B) amino alcohol) has good adhesion characteristics and coating characteristics, and almost no odor. The water-dispersed resin compositions of Comparative Examples, which did not contain either of (A) aqueous resin emulsion and (B) aminoalcohol, had inferior adhesion characteristics and coating characteristics compared with those of Examples.

Industrial applicability

The present invention can provide a water-dispersed resin composition. The water-dispersible resin composition according to the present invention is applied on fibrous products, and can be used to prepare absorbent products, such as hygienic material applications such as diapers, sanitary napkins, incontinence pads, and hygienic materials.

reference sign

1 Fibrous products (nonwovens)

2 water absorbent polymer

3 Water-dispersed resin composition

Claims (5)

1. A water-dispersible resin composition for fiber products, comprising: (A) an aqueous resin emulsion, and (B) Amino alcohols. 2. The water-dispersible resin composition according to claim 1, wherein the (A) aqueous resin emulsion comprises a polymer of a compound having one or more (meth)acryloyl groups. 3. The water-dispersible resin composition according to claim 1 or 2, wherein the (A) aqueous resin emulsion comprises a polymer comprising a monomer of a compound represented by the following formula (I): CH ₂ =C(R ¹ )-COOR ² formula (I) Wherein R1 represents ^a hydrogen atom or a methyl group, and R2 represents a ^hydrogen atom or an alkyl group. 4. The water-dispersible resin composition according to any one of claims 1 to 3, wherein the glass transition temperature of the solid component of the (A) aqueous resin emulsion is -50°C to 80°C. 5. The water-dispersible resin composition according to any one of claims 1-4, wherein the water-dispersible resin composition is Contains 0.1-3.0 parts by weight of the (B) amino alcohol.