A composition is described comprising a styrene-isobutylene block copolymer; and at least one ethylenically unsaturated monomer. After curing the composition comprises polymerized units of the ethylenically unsaturated monomer. In some embodiments the ethylenically unsaturated groups are selected from (meth)acryl or vinyl ether. The composition is suitable for use as a (e.g. pressure sensitive) adhesive. Articles, methods of making an article, and methods of bonding are also described.

A composite particle for an electrochemical element including an electrode active material and a granular polymer, wherein the granular polymer is composed of a graft polymer, the graft polymer has a molecular structure which includes a specific backbone portion and a graft portion bonded to the backbone portion, the graft portion being a hydrophilic graft chain, a content ratio of the graft portion in the graft polymer is 1 part by weight or more and 40 parts by weight or less relative to 100 parts by weight of the backbone portion, and an angle of repose of the composite particle is 20° to 40°. Also provided are a producing method of the composite particle, an electrode for an electrochemical element including the composite particle, and an electrochemical element including the same.

A composite particle for an electrochemical element including an electrode active material and a granular polymer, wherein the granular polymer is composed of a graft polymer, the graft polymer has a molecular structure which includes a specific backbone portion and a graft portion bonded to the backbone portion, the graft portion being a hydrophilic graft chain, a content ratio of the graft portion in the graft polymer is 1 part by weight or more and 40 parts by weight or less relative to 100 parts by weight of the backbone portion, and an angle of repose of the composite particle is 20° to 40°. Also provided are a producing method of the composite particle, an electrode for an electrochemical element including the composite particle, and an electrochemical element including the same.

A composition for temporary bonding, includes: (A) a (meth)acrylate having the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose side chain is an alkyl group having 18 or more carbon atoms and homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer and/or a polyisobutene copolymer; and (C) a photo radical polymerization initiator.

A composition for temporary bonding, includes: (A) a (meth)acrylate having the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose side chain is an alkyl group having 18 or more carbon atoms and homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer and/or a polyisobutene copolymer; and (C) a photo radical polymerization initiator.

The present invention provides a resin composition, containing: a component (I) of a modified block copolymer (I) that has a polymer block (A) mainly comprising a vinyl aromatic compound unit, and a polymer block (B) mainly comprising a conjugated diene compound unit, and has 0.01% by mass or more of a polar group; and a component (II) of a resin (II) having a polar group (excluding the component (I)), in which a mass ratio between the component (I) and the component (II), (I)/(II), is 1/99 to 70/30, and the component (I) satisfies the following conditions (i) to (iii): <Condition (i)> A content of the vinyl aromatic compound unit in the modified block copolymer (I) is 1 to 30% by mass. <Condition (ii)> A vinyl bond content is 1 to 55%. <Condition (iii)> A hydrogenation rate is 5 to 55%.

The present invention provides a resin composition, containing: a component (I) of a modified block copolymer (I) that has a polymer block (A) mainly comprising a vinyl aromatic compound unit, and a polymer block (B) mainly comprising a conjugated diene compound unit, and has 0.01% by mass or more of a polar group; and a component (II) of a resin (II) having a polar group (excluding the component (I)), in which a mass ratio between the component (I) and the component (II), (I)/(II), is 1/99 to 70/30, and the component (I) satisfies the following conditions (i) to (iii): <Condition (i)> A content of the vinyl aromatic compound unit in the modified block copolymer (I) is 1 to 30% by mass. <Condition (ii)> A vinyl bond content is 1 to 55%. <Condition (iii)> A hydrogenation rate is 5 to 55%.

A photosensitive resin composition for flexographic printing includes components (A) to (E) below: (A) a first styrene-butadiene-styrene block copolymer (SBS); (B) a second styrene-butadiene-styrene block copolymer (SBS); (C) a polybutadiene or a derivative thereof; (D) a photopolymerizable monomer; and (E) a photopolymerization initiator, and comprises with respect to (A), 5 to 100 wt % of (B), 10 to 40 wt % of (C), 40 to 200 wt % of (D), and 4 to 20 wt % of (E).

A photosensitive resin composition for flexographic printing includes components (A) to (E) below: (A) a first styrene-butadiene-styrene block copolymer (SBS); (B) a second styrene-butadiene-styrene block copolymer (SBS); (C) a polybutadiene or a derivative thereof; (D) a photopolymerizable monomer; and (E) a photopolymerization initiator, and comprises with respect to (A), 5 to 100 wt % of (B), 10 to 40 wt % of (C), 40 to 200 wt % of (D), and 4 to 20 wt % of (E).

Provided is a polyolefin block copolymer having covalently attached residues of one or more vinyl monomer selected from the group consisting of one or more (meth)acrylic monomers, one or more vinyl aromatic monomers, and mixtures thereof.