Denka Company Limited

Tometomo Uchida

Toru Arai

Takashi Domoto

Takako Tanigawa

Jun Watanabe

Jun Yoshida

Yoshitsugu Goto

Ayumu Tsukamoto

Kenji Nomura

Megumi Sudo

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.

Composition

A composition for temporary bonding, including the following (A) to (C). An adhesive for temporary bonding for manufacturing an electronic device, including the composition for temporary bonding. (A) A (meth)acrylate comprising the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer; and (C) a photo radical polymerization initiator.

The present invention addresses the problem of providing a cross-copolymer having excellent flexibility, heat resistance, cold resistance and mechanical properties. The present invention also addresses the problem of providing a resin composition which is prepared using the cross-copolymer, has excellent compatibility with polyolefin resins and aromatic resins, and has excellent flexibility, heat resistance and cold resistance. The problem can be solved by a cross-copolymer produced by a polymerization process comprising a coordination polymerization step and a crossing step, wherein the coordination polymerization step comprises copolymerizing an ethylene monomer, a specific olefin monomer and an aromatic polyene together using a single site coordination polymerization catalyst to synthesize an ethylene-olefin-aromatic polyene copolymer that meets a specific requirement, and the crossing step comprises carrying out a polymerization in the co-presence of the ethylene-olefin-aromatic polyene copolymer and an aromatic vinyl compound monomer using an anionic polymerization initiator or a radical polymerization initiator.

Cross-copolymer, and resin composition

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Machida, Japan

Tometomo Uchida