JP2002167520A - Resin composition containing water-absorptive resin and adhesive comprising the resin composition as effective component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition excellent in the characteristics of imparting high adhesive properties to an adhered when a laminate is used (high adhesive properties), of being able to treat the adhered at a low temperature when it is recovered (low-temperature releasability), and of being able to release easily the adhered from the laminate after the treatment and to submit readily the adhered thus-recovered to recycle with little deposition of the adhesive on the adhered (easy repellency). SOLUTION: There are provided a resin composition containing a crosslinkable polymer and a water-absorptive resin, and an adhesive comprising the resin composition as an effective component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin composition containing a water-absorbing resin and a crosslinkable polymer, an adhesive containing the resin composition as an active ingredient, and an adhesive and an adherend. It relates to a laminate.

[0002]

2. Description of the Related Art Laminates formed by laminating an adhesive on an adherend are widely used in automobile articles, office supplies, home electric appliances, building materials, electronic products and the like. Recently, in order to recycle (reuse) the adherend, an adhesive capable of recovering the adherend from the laminate has been required.
In -69906, an adhesive containing a foaming agent and a urethane resin is proposed, and a laminate using the adhesive is:
It has been reported that when heated, the adhesive foams and the adherend can be peeled and collected.

[0003]

However, the adhesive containing a foaming agent usually has to be heated at a high temperature of about 120 ° C. or higher, and when the heat resistant temperature of the adherend is low, the adherend is not heated. Has proven difficult to reuse. Furthermore, the present inventors have studied a laminate using the adhesive described in the above publication, and when the laminate is heated, the adherend is peeled from the laminate, but the adherend is adhered to the peeled adherend. It became clear that the agent layer adhered and it was difficult to reuse the adherend as it was. An object of the present invention is to provide a high adherence to an adherend when using a laminate (high adhesiveness), to be able to process at a low temperature when recovering the adherend (low temperature peelability), and to perform after treatment. Is excellent in properties such as easy peeling of the adherend from the laminated body and easy recycling (reuse) with little adhesion of the adhesive to the collected adherend (easy peelability) And a resin composition.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies on a crosslinkable polymer in order to solve the above-mentioned problems. As a result, a resin composition containing a water-absorbing resin has high adhesiveness and low-temperature peelability. The present invention was found to be an adhesive excellent in both easy peelability and peelability, and completed the present invention. That is, the present invention is a resin composition containing a crosslinkable polymer and a water-absorbing resin, and an adhesive containing the resin composition as an active ingredient.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. As the water-absorbing resin in the present invention, for example,
Resins that absorb water and swell when contacted with water to make the whole water into a gel state. The water-absorbing power of the water-absorbing resin is usually about 2 to 2000 times, preferably about 20 to 1000 times the weight of the water-absorbing resin solid content. Specific water-absorbing resins include starch-based resins such as graft polymers of acrylic acid and a cross-linking agent onto starch, and carboxydimethylated starch; cellulose-based resins; polyacrylate-based resins; polyvinyl alcohol-based resins; Polyacrylamide resin; polyoxyethylene resin; As the water absorbing resin, two or more kinds of water absorbing resins may be used.

[0006] As the water-absorbing resin, a graft polymer of acrylic acid and a crosslinking agent onto starch and a polyacrylate resin are preferable, and a polyacrylate resin is particularly preferable. Examples of the water-absorbent resin include, for example, "Aqua Keep (registered trademark)" manufactured by Sumitomo Seika Chemical Co., Ltd. and "Sunwet (registered trademark)" manufactured by Sanyo Chemical Industry Co., Ltd. 1000 μm
A commercially available product such as a sphere having a degree is preferably used.

The crosslinkable polymer of the present invention is a polymer which can be applied before bonding and is a polymer which is bonded and then crosslinked intramolecularly to form a three-dimensional polymer. About 80% or more. Here, as a method for measuring the insoluble content in water, for example, a cross-linkable polymer that has become a three-dimensional polymer is immersed in 500 ml of water for 48 hours, and then the insoluble content collected by filtration through a 200-mesh wire net is dried. It can be determined from the weight. Examples of the crosslinkable polymer include a photocurable resin and a thermosetting resin.

Here, the photo-curable resin usually includes a photo-curable oligomer and / or monomer;
It is a resin containing a photopolymerization initiator. Examples of the oligomer and / or monomer having photocurability include an oligomer and / or monomer having at least one unsaturated carbon-carbon bond capable of photoradical polymerization, and a molecular terminal capable of photo Michael addition polymerization. Examples include a combination of an oligomer having a double bond and a polythiol, and an alicyclic epoxy compound capable of photocationically polymerizing. Among them, it is preferable to use an oligomer and / or a monomer having at least one unsaturated carbon-carbon bond.

As the oligomer having an unsaturated carbon-carbon bond, an oligomer having at least one kind of unsaturated group selected from an acryloyl group, a methacryloyl group and a vinyl group is usually used. Specifically, urethane acrylates, urethane acrylates such as urethane methacrylate, epoxy acrylates, epoxy acrylates such as epoxy methacrylate, polyester acrylates, polyester acrylates such as polyester methacrylate, melamine acrylate, melamine acrylates such as melamine methacrylate, Acrylic resin acrylates, unsaturated polyesters and polyenes are exemplified.

As urethane acrylates, for example, those obtained by reacting an organic polyisocyanate, a polyol and a hydroxy acrylate compound, etc., are also obtained by reacting an organic polyisocyanate and a hydroxy acrylate compound. It may be something. Examples of epoxy acrylates include those obtained by reacting acrylic resin and / or methacrylic acid with an epoxy resin such as a bisphenol A epoxy resin and a novolak type epoxy resin. As polyester acrylates, for example,
Examples thereof include those obtained by reacting acrylic acid and / or methacrylic acid with a polyester polyol synthesized from a polyhydric alcohol and a polycarboxylic acid.
As melamine acrylates, for example, melamine,
Examples thereof include those obtained by subjecting melamine resin obtained by condensation polymerization of urea, benzogamine or the like with formalin or the like to a dealcoholation reaction with β-hydroxyethyl acrylate or the like. As acrylic resin acrylates, for example, carboxylic acid groups, hydroxyl groups, contained in acrylic resin,
Examples thereof include those obtained by reacting acrylic acid and / or methacrylic acid with a functional group such as a glycidyl group. Examples of unsaturated polyesters include those obtained by reacting a polyol with an α, β-unsaturated dicarboxylic acid such as fumaric acid and maleic anhydride. Examples of the polyenes include those obtained by reacting an organic polyisocyanate with allyl alcohol and / or vinyl alcohol.

On the other hand, the monomer having an unsaturated carbon-carbon bond is usually at least one kind of unsaturated group-containing monomer selected from monofunctional acrylic monomers, polyfunctional acrylic monomers and vinyl group-containing monomers. Monomers and the like are used.

As the monofunctional acrylic monomer, a compound containing one acrylate group or methacrylate group in the molecule is usually used, and specific examples thereof include isobornyl acrylate, isobornyl methacrylate, and dicycloalkyl methacrylate. Monomers having a ring structure such as pentenyl acrylate, dicyclopentenyl methacrylate, tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, phenyl acrylate, phenyl methacrylate, benzyl acrylate and benzyl methacrylate, and 2-hydroxyethyl acrylate and 2-hydroxyethyl methacrylate , 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, 4-hydroxybutyl acrylate,
-Hydroxybutyl methacrylate, 2-hydroxy-
Examples include monomers having a hydroxyl group such as 3-phenoxypropyl acrylate and 2-hydroxy-3-phenoxypropyl methacrylate. Further, monofunctional acrylic monomers in which the raw material alcohol or phenol in the above-mentioned monomers having a ring structure is modified with an alkylene oxide in advance can also be used.
Particularly, a modified product of alkylene oxide having 2 to 3 carbon atoms is preferable, and examples thereof include dicyclopentenyloxyethyl acrylate, dicyclopentenyloxyethyl methacrylate, phenyloxyethyl acrylate, and phenyloxyethyl acrylate.

As the polyfunctional acrylic monomers, compounds containing two or more acrylate groups or methacrylate groups in the molecule are usually used.
Examples of the acrylate group-containing compound include polyethylene glycol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, neopentyl glycol hydroxypivalic acid diacrylate, caprolactone-modified neopentyl glycol hydroxypivalic acid diacrylate, and trimethylol. Examples include propane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, caprolactone-modified dipentaerythritol hexaacrylate, and tris [acryloxyethyl] isocyanate.

Examples of vinyl group-containing monomers include vinyl esters such as vinyl acetate, vinyl propionate and branched fatty acid vinyl; aromatic vinyls such as styrene, chlorostyrene, alkylstyrene, and divinylbenzene;
Nitrogen-containing vinyls such as N-vinylpyrrolidone and N-vinylcaprolactam.

The photocurable oligomer and / or monomer includes, for example, one or more monomers,
One or more kinds of oligomers, a mixture of one or more kinds of monomers and one or more kinds of oligomers, and the like may be mentioned.
It is preferred to use a mixture of more than one oligomer and one or more monomers.

The photopolymerization initiator contained in the photocurable resin includes, for example, carbonyl compounds, sulfur compounds, azo compounds, peroxides and the like. Among them, carbonyl compounds are preferred, and specifically, benzophenone, benzyl, Michler's ketone, 2-chlorothioxanthone,
2,4-diethylthioxanthone, benzoin ethyl ether, diethoxyacetophenone, benzyldimethyl ketal, 2-hydroxy-2-methylpropiophenone, 1-hydroxycyclohexyl phenyl ketone,
2,2-dimethoxy-1,2-diphenylethane-1-
On, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, and 2,
Carbonyl compounds that absorb ultraviolet light, such as 4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine; camphorquinone;
And carbonyl compounds that absorb visible light, such as ketocoumarin.

As the photopolymerization initiator, two or more photopolymerization initiators may be used. In addition, the photocurable resin, if necessary, N, N-dimethylaminoacetophenone, pN,
A photopolymerization initiation aid such as ethyl N-dimethylbenzoate or a photosensitizer may be contained. The amount of the photopolymerization initiator used in the photocurable resin is based on 100 parts by weight of the photocurable oligomer and / or monomer.
Usually, it is about 0.5 to 20 parts by weight.

As the photocurable resin, for example, “Sumiflash XR-235, XR-98” (photocurable resin manufactured by Sumitomo Chemical Co., Ltd.), “DAICURE SD170”
A commercially available photocurable resin such as “0” (photocurable resin manufactured by Dainippon Ink and Chemicals, Inc.) may be used.

The thermosetting resin used as the crosslinkable polymer of the present invention includes, for example, novolak resin, resol resin, urea resin, melamine resin, alkyd resin, imide resin, urethane resin, epoxy resin, Modified silicone resins, such as silyl group-terminated polyethers into which silyl groups have been introduced, unsaturated polyester resins, and the like, among which epoxy resins are preferred.

Here, the epoxy resin will be described in detail. The epoxy resin contains a main agent containing an epoxy group and a curing agent, and is usually not cured when mixed with a water-absorbing resin. It has a viscosity that allows it to be applied to an adherend even when it is partially cured, and includes a resin that is cured after bonding. Examples of the main agent include glycidyl ether epoxy resins such as bisphenol A epoxy resin, bisphenol F epoxy resin, phenol novolak epoxy resin, cresol novolak epoxy resin, and brominated epoxy resin; butadiene;
Alicyclic epoxy resin obtained by epoxidizing double bonds such as pentadiene, vinylcyclohexene, dicyclopentyl ether, etc .; polyglycidyl compounds obtained by reacting polyol, hydroxyl-containing silicone resin, etc. with epihalohydrin; N, N-diglycidylaniline Glycidylamine resins such as glycidylamine, tetraglycidyldiaminodiphenylmethane, triglycidyl-p-aminophenol; diglycidyl phthalate, diglycidyl tetrahydrophthalate, diglycidyl hexahydrophthalate, diglycidyl-p-oxybenzoic acid, etc. Glycidyl ester resins and the like can be mentioned. In addition, 2
More than one type of base may be used. As the main agent, glycidyl ether-based epoxy resin and glycidylamine-based resin are preferable, and bisphenol A-type epoxy resin is particularly preferable.

The curing agent contained in the epoxy resin includes, for example, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, dipropylenediamine, diethylaminopropylamine, piperidine, N-
Aliphatic polyamines such as aminoethylpiperazine, mensendiamine, m-xylenediamine; 2- (dimethylaminomethyl) phenol, bis (dimethylaminoethyl)
Dimethylaminoalkylphenols such as phenol and 2,4,6-tris (dimethylaminomethyl) phenol; aromatic amines such as methanephenylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, trimetic anhydride, ethylene glycol bis (anhydrotrimethylene) Acid anhydrides such as glycerol tris (anhydrotrimellitate), pyromellitic anhydride, maleic anhydride, and tetrahydrophthalic anhydride; polyaminopolyamide which reacts polyamine with dimer acid; 2-methylimidazole, 2-ethyl Imidazoles such as -4-methylimidazole and 2-undecylimidazole; boron trifluoride-amine complexes; dicyandiamide; aromatic diazonium salts; and polysulfides. Incidentally, two or more kinds of curing agents may be used as the curing agent. As the curing agent, dimethylaminoalkylphenols and polyaminopolyamide are particularly preferable.

Examples of the method of mixing the main agent of the epoxy resin and the curing agent include a method of mixing the main agent and the curing agent before mixing with the water-absorbing resin, a method of mixing the main agent and the water-absorbing resin, and , A method in which a curing agent and a water-absorbing resin are mixed and a main agent is mixed before bonding, and a method in which the main agent, a curing agent, a water-absorbing resin, and the like are collectively mixed. Further, other thermosetting resin, photocurable resin, or the like may be mixed with the epoxy resin.

As the epoxy resin, for example, "Araldite Rapid" (epoxy adhesive manufactured by Ciba Specialty Chemicals), "ER-10" (epoxy tree adhesive manufactured by NSC), and "Bond Quick 5" (manufactured by Konishi) Epoxy adhesives) and commercially available epoxy resins such as “EP-330” (epoxy adhesive manufactured by Cemedine) may be used.

The crosslinkable polymer of the present invention may contain another resin as long as the adhesiveness and the easy releasability are not impaired. Examples of these resins include polymerizable double bond-containing monomers such as unsaturated polyesters and prepolymers thereof; polybutadiene, maleated butadiene, epoxidized butadiene, maleated butadiene, butadiene-acrylonitrile copolymer and its carboxyl group-containing copolymer. Resin, polychloroprene, maleated butadiene, butadiene-acrylonitrile copolymer and its carboxyl group-containing resin, polychloroprene, butadiene-styrene copolymer, polyisoprene, butyl rubber,
Low molecular weight liquid to high molecular weight elastomers such as fluororubber and natural rubber; polyethylene, polypropylene, polybutene, poly-4-methylpentene, polystyrene, AS resin, MBS resin, ABS resin, polyethylene-propylene copolymer, tetrafluoroethylene- Hexafluoropropylene copolymers; polycarbonate, polyphenylene ether, polysulfone, polyester, polyimide,
Examples thereof include high molecular weight polymers such as polyphenylene sulfide and low molecular weight prepolymers or oligomers thereof; polyurethane; polyfunctional maleimides; and polyvinyl alcohol having gas barrier properties.

In addition, inorganic and organic fillers, dyes, pigments, thickeners, defoamers, dispersants, flame retardants, brighteners, thixotropic agents, adhesion promoters, surfactants and the like are added to the crosslinkable polymer. , An additive such as a surface conditioner, an ultraviolet absorber, an antioxidant, an antioxidant and an antistatic agent, and a solvent such as toluene and methanol.

The resin composition of the present invention is obtained by mixing a crosslinkable polymer and a water absorbent resin. As the content of the water-absorbing resin in the resin composition of the present invention, while having a sufficient adhesive force to the adherend, when collecting the adherend by heating, the adhesive layer easily from the adherend This is an amount necessary to reduce the adhesive strength to such an extent that it can be peeled off. Specifically, it differs depending on the type of the water absorbent resin, for example,
When the water-absorbing resin is a polyacrylate-based resin, it is usually about 10 to 120 parts by weight of the water-absorbing resin (solid content) with respect to 100 parts by weight of the crosslinkable polymer (solid content). It is about 30 to 80 parts by weight.

The resin composition thus obtained is, for example,
It can be used for adhesives and the like. Then, the laminate of the present invention can be obtained by bonding the adherend with the adhesive. Here, as the adherend, for example, metals such as iron, steel, gold, silver, copper, and aluminum;
Inorganic substances such as glass, gypsum, ceramics, ceramics, etc., plastics such as polyolefin, polycarbonate, polystyrene, polyester, polyether, polyimide, polyamide, epoxy, polyurethane, ABS, rubber, etc., or natural fibers such as cotton, hemp, silk, etc. , Viscote rayon, synthetic fiber such as cellulose acetate, wood,
Examples include paper and leather. Among them, metals and plastics are preferred.

As the adherend, a composite material such as a fiber-reinforced composite material and a plastic containing an inorganic filler may be used. Further, the adherend may be subjected to a surface treatment such as a release agent, a coating such as plating, a precoating such as painting, a surface modification by plasma or laser, a surface oxidation, and an etching, as necessary. .

Examples of the method of applying the adhesive of the present invention to an adherend include a method using a roll coater, a spray application, a blade coater, a screen application, a method using an applicator, and a method using spin coating. And the like. The thickness of the adhesive obtained by these methods is usually about 5 to 400 μm.

The order of lamination of the laminate of the present invention is, for example, (A): adherend / adhesive of the present invention / adherend,
(B): adherend / adhesive of the present invention / normal adhesive / adhesive of the present invention / adherent, (C): adherend / adhesive not containing water-absorbent resin / adhesive of the present invention Laminated bodies laminated in the order of agent / adherend are exemplified. Any of the adherends such as (A) and (B) in which the adhesive of the present invention is applied to the surface of the adherend can be recovered. When one of the adherends is not immediately reused as in (C), specifically, the adherend is incinerated after being collected, or is reused after being melted or melted. In the case of a metal or the like, the surface of the adherend that is not immediately reused is coated with an adhesive that does not contain a water-absorbing resin, and the surface of the adherend that is reused is the adherend of the present invention. Is applied. Although the adhesive layer adheres to the adherend that is not immediately reused, the adhesive layer does not adhere to the adherend whose surface is coated with the adhesive of the present invention, and can be reused as it is. .

The method of recovering the adherend from the laminate in the present invention includes, for example, a method of immersing the laminate in water such as a water tank, swelling the adhesive layer and recovering the adherend, steam, water, and the like. A method of injecting water, fountain (spray) or water discharge into the laminate to swell the adhesive layer and collect the adherend. The temperature of water and steam used in the above-mentioned recovery method varies depending on the heat-resistant temperature of the adherend, but is usually about 5 to 100 ° C., and the higher the temperature, the faster the water absorption and swelling tend to be. . Further, a surfactant or an immersion promoter such as alcohol may be added to the water absorbed by the water absorbent resin.

The adherend recovered in this way has little or no adhesive layer attached thereto, even if the adhesive layer is attached.
The adhesive can be easily separated from the adherend, and the collected adherend can be reused. When the adherend is a metal, a thermoplastic plastic, or the like, the adherend can be melt-molded and reused.

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. Parts and percentages in the examples are on a weight basis unless otherwise specified.

<Adherend: A> The following test pieces were used as the adherend. A-1: Aluminum (AL) plate 25 mm x 100 mm, thickness 1 mm (A1050P HB (mirror finish) manufactured by Sumitomo Light Metal Co., Ltd.) A-2: Polycarbonate (PC) plate 25 mm x 100 mm, thickness 2 mm (Takiron Corporation Takiron 1600)

<Preparation of Crosslinkable Polymer Containing Water Absorbent Resin:
(B)> “Photocurable resin + water-absorbent resin”: (B-1) Photocurable resin “Sumiflash XR-98” (trade name; manufactured by Sumitomo Chemical Co., Ltd .; hereinafter, referred to as “XR98”) 66
Water-absorbent resin "Aqua Keep SA60" (product name;
A resin composition was prepared by mixing 34 parts of Sumitomo Seika Co., Ltd. (hereinafter, referred to as "SA60"). "Thermosetting resin + water-absorbing resin": (B-2) Two-part epoxy adhesive "ER-10" (trade name; manufactured by NSC, Japan, hereinafter referred to as "ER10") Two-part 1: 1
In 66 parts of the mixture, a water-absorbent resin “Sumikagel S-50” (trade name; manufactured by Sumitomo Chemical Co., Ltd .; hereinafter, referred to as “S50”) 3
A resin composition comprising 4 parts was prepared.

<Crosslinkable polymer: (C)> C-1: XR98 C-2: Two-part epoxy adhesive "Araldite Rapid" (trade name; manufactured by Ciba Specialty Chemicals, hereinafter referred to as "AR")

<Adhesion Test> Each end of the test piece was
It stuck in the area of ^{25mm × 25mm (= 625mm 2)} , JIS K
The adhesion between the adherends before the water immersion treatment was measured by a tensile test according to 6850.

<Embodiment 1> P as a reusable adherend
Using a C plate (A-2), the adhesive (B-1) is coated on one side thereof with a bar coat so as to have a thickness of about 400 μm, and UV irradiation is performed at an irradiation amount of 400 mJ / cm ^2. Cured. Using an AL plate (A-1) as an adherend that does not reuse the adhesive (C) that does not contain a water-absorbent resin, applying a bar coat on one surface thereof to a thickness of about 100 μm, The surfaces of the adhesive layers (B) and (D) were overlaid and bonded together, and then cured and cured at room temperature for 7 days at room temperature to complete a laminate. The obtained laminate was immersed in warm water of 80 ° C. for 12 hours and then taken out. The laminate was peeled into two pieces. Although the adhesive layer was adhered to the peeled PC board, it was easily peeled off by washing with water.

<Embodiment 2> As a reusable adherend, A
Using an L plate (A-1), an adhesive (B-1) was applied on one surface thereof with a bar coat so as to have a thickness of about 100 μm, and a PC plate (A- The laminate was bonded to 2) and cured for 7 days at room temperature in the state of pressure bonding to complete a laminate. When the obtained laminate was immersed in water at 80 ° C. for 12 hours and then taken out, the laminate was peeled into two pieces. Although the adhesive layer was adhered to the peeled AL plate (A-2), it was easily peeled off by washing with water.

Comparative Example 1 "XR98" (C-1) was applied on one side of a PC board (A-2) by spin coating so as to have a thickness of about 20 μm, and irradiated with 400 mJ / cm ² . Irradiation was performed by UV irradiation to cure the amount. On the other hand, one side of the AL plate (A-1) is coated with “AR” (C-2) by a bar coat so as to have a thickness of about 100 μm, and immediately, these coated adherends are applied. The surfaces of the adhesive layers were overlapped and bonded together, and cured and cured at room temperature for 7 days at a room temperature to complete a laminate. When the obtained laminate was immersed in warm water of 80 ° C. for 12 hours and then taken out, no peeling was observed and 1 N / mm 2
Was subjected to a tensile test, but did not peel.

<Comparative Example 2> One side of the AL plate (A-1) was coated with “ER-10” by a bar coat so as to have a thickness of about 100 μm, and the PC plate (A-2) was immediately coated. The laminated body was cured by curing for 7 days at room temperature in the state of being bonded and crimped. When the obtained laminate was immersed in warm water of 80 ° C. for 12 hours and then taken out, no peeling was observed and 1 N / mm ²
Was subjected to a tensile test, but did not peel.

The results for Examples 1 and 2 and Comparative Examples 1 and 2 are summarized in Table 1. The peeling state after the water immersion treatment in Table 1 will be described by taking Example 1 as an example. For the adherend A-1 which is not reused, since the adhesive layer was adhered, X: the adherend to be reused Since no adhesive layer was attached to A-2, it was represented as ○.

[0042]

[Table 1]

[0043]

The adhesive containing the resin composition of the present invention as an active ingredient gives high adherence to an adherend when using a laminate, and can be treated at a low temperature when recovering the adherend. After the treatment, the adherend is easily peeled off from the laminate, and can be easily recycled (reused) with little adhesive attached to the collected adherend. Refrigerators that require reuse of adherends
Home appliances such as washing machines, air conditioners, microwave ovens, vacuum cleaners, TVs, etc., office supplies such as personal computers, printers, copiers, telephones, furniture, automobile parts such as bumpers, housing structural materials,
It can be used for building materials such as sealing materials, electronic products such as liquid crystal panels, semiconductors, printed wiring boards and integrated circuits, and bare cell packages for battery materials such as secondary batteries. Further, the collected adherend can be recycled (reused).

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) C09J 133/02 C09J 133/02 201/00 201/00 F term (reference) 4J002 AB01W AB04W BE01W BG01W BG13W BN23W CD20X CF21X CF27X CH02W CK05X 4J040 BA012 BA122 DD022 DF012 DF092 DL012 EB031 EC001 EE002 EF001 FA021 FA131 FA221 FA241 FA261 FA271 FA291 JB02 JB08 KA16 MA01 MA02 MA08 MA09 MA10 MA13 NA10

Claims (10)

[Claims] 1. A resin composition comprising a crosslinkable polymer and a water absorbent resin. 2. The water-absorbing resin is a polyacrylate resin and / or a starch resin.
3. The resin composition according to item 1. 3. The resin composition according to claim 1, wherein the crosslinkable polymer is a thermosetting resin and / or a photocurable resin. 4. The resin composition according to claim 1, wherein the water-absorbent resin is contained in an amount of 10 to 120 parts by weight based on 100 parts by weight of the crosslinkable polymer. 5. An adhesive comprising the resin composition according to claim 1 as an active ingredient. 6. A laminate comprising the adhesive according to claim 5 and an adherend. 7. An adherend is made of a metal, an inorganic substance, a plastic,
The laminate according to claim 6, wherein the laminate is at least one selected from synthetic fibers, natural fibers, synthetic fibers, wood, paper, and leather. 8. A method for recovering an adherend, comprising using the adhesive according to claim 5. 9. A method for recovering an adherend, comprising immersing the laminate according to claim 6 or 7 in water or pouring water into the laminate. 10. A method for recycling an adherend, wherein the adherend obtained by the recovery method according to claim 8 or 9 is reused.