There is provided a new pressure-sensitive adhesive resin composition that can have adhesiveness to the extent of being peelable in a room temperature condition, has fluidity by hot-melting, and can finally be crosslinked to firmly bond adherends to each other. There is proposed a pressure-sensitive adhesive resin composition comprising 100 parts by mass of an acrylic copolymer (A), 0.5 to 20 parts by mass of a crosslinking agent (B), and 0.1 to 5 parts by mass of a photopolymerization initiator (C), wherein the acrylic copolymer (A) is a graft copolymer having a weight average molecular weight of 5.0×10.sup.4 to 5.0×10.sup.5, contains as a trunk component of the graft copolymer a repeating unit derived from a (meth)acrylate, contains as a branch component of the graft copolymer a repeating unit derived from a macromonomer having a number average molecular weight of 5.0×10.sup.2 or more and less than 6.0×10.sup.3, and contains the repeating unit derived from the macromonomer in the acrylic copolymer (A) in a proportion in a range of 0.1 to 3 mol %.

There is provided a new pressure-sensitive adhesive resin composition that can have adhesiveness to the extent of being peelable in a room temperature condition, has fluidity by hot-melting, and can finally be crosslinked to firmly bond adherends to each other. There is proposed a pressure-sensitive adhesive resin composition comprising 100 parts by mass of an acrylic copolymer (A), 0.5 to 20 parts by mass of a crosslinking agent (B), and 0.1 to 5 parts by mass of a photopolymerization initiator (C), wherein the acrylic copolymer (A) is a graft copolymer having a weight average molecular weight of 5.0×10.sup.4 to 5.0×10.sup.5, contains as a trunk component of the graft copolymer a repeating unit derived from a (meth)acrylate, contains as a branch component of the graft copolymer a repeating unit derived from a macromonomer having a number average molecular weight of 5.0×10.sup.2 or more and less than 6.0×10.sup.3, and contains the repeating unit derived from the macromonomer in the acrylic copolymer (A) in a proportion in a range of 0.1 to 3 mol %.

An adhesive material that provides fast and robust adhesion on wet surfaces, where the adhesion formed is detachable on-demand. The adhesive material is formed of one or more hydrophilic polymers or copolymers grafted with one or more amine coupling groups via a plurality of cleavable physical bonds and/or cleavable covalent bonds and one or more cross linkers. Application of the adhesive material on a wet surface causes the adhesive material to absorb liquid to thereby swell the adhesive material to form a layer of hydrogel, resulting in the formation of temporary crosslinks followed by covalent crosslinks with the surface. Introducing a triggering agent cleaves the cleavable physical bonds and/or cleavable covalent bonds to allow for non-traumatic detachment of the adhesive material from the surface.

An adhesive agent that is favorable in terms of peeling form, adhesive strength, and viscosity is provided. The adhesive agent contains an epoxy resin (A), fine polymer particles (B), and a non-crosslinked acrylic resin (C). With respect to 100 parts by mass of the epoxy resin (A), 1 part by mass to 100 parts by mass of fine polymer particles (B) and 1 part by mass to 100 parts by mass of a non-crosslinked acrylic resin (C) are contained in the adhesive agent. The fine polymer particles (B) contain a rubber-containing graft copolymer that includes (i) an elastic body containing a specific material and (ii) a graft part containing a specific material.

The sheet-shaped photocurable composition of the present invention includes components (A) to (D) as follows, and is in a sheet shape at 25° C. in a state before curing: Component (A): (meth)acrylic triblock copolymer, Component (B): (meth)acrylate oligomer (excluding the component (A)), Component (C): a monomer having a (meth)acryloyl group and having a specific structure, and Component (D): photoinitiator.

The present invention relates to a resin composition containing a modified hydrogenated product (A) of a block copolymer containing a polymer block (A-1) having a structural unit derived from an aromatic vinyl compound and a polymer block (A-2) having a structural unit derived from a conjugated diene compound, and a polyolefin resin (B), wherein the modified hydrogenated product (A) has one or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and a group derived from an acid anhydride, and the polymer block (A-2) has a vinyl bond amount of 50 to 99 mol %; and the resin composition further containing a polar resin (C).

The present invention provides fast fixturing two part adhesive compositions which include a first part containing a (meth)acrylic component and a cure system for an epoxy resin component of the second part and a second part containing an epoxy resin component and a cure accelerator for the (meth)acrylic component of the first part.

Thermoplastic elastomer compositions comprising acrylic multigraft copolymers are described. The multigraft copolymers comprise a rubbery polyacrylate backbone and a plurality of randomly spaced glassy polyacrylate side chains. The multigraft copolymers can be prepared using a facile grafting through method that can provide copolymers with enhanced purity. The acrylic multigraft copolymers exhibit microphase separated morphologies and “superelastomeric” properties, including an elongation at break, stress at break, and/or strain recovery behavior that exceeds that of conventional triblock copolymer polyacrylate thermoplastic elastomers.

A bonding material is described that is well suited to bonding polymer films, such as polyester films, to other substrates. In one embodiment, for instance, the bonding material can be used to bond a polyester film to a polypropylene article. The bonding material generally comprises an adhesive agent combined with a cross-linking agent. The adhesive agent may comprise a carboxylic acid modified polypropylene homopolymer, copolymer or ionomer. In one embodiment, the adhesive agent comprises a polypropylene modified by an unsaturated dicarboxylic acid anhydride. The cross-linking agent, on the other hand, may comprise an oxazoline polymer.

A bonding material is described that is well suited to bonding polymer films, such as polyester films, to other substrates. In one embodiment, for instance, the bonding material can be used to bond a polyester film to a polypropylene article. The bonding material generally comprises an adhesive agent combined with a cross-linking agent. The adhesive agent may comprise a carboxylic acid modified polypropylene homopolymer, copolymer or ionomer. In one embodiment, the adhesive agent comprises a polypropylene modified by an unsaturated dicarboxylic acid anhydride. The cross-linking agent, on the other hand, may comprise an oxazoline polymer.