Sumitomo Chemical Company, Limited

Kenichi Takeuchi

Hirofumi Kato

Orhan Ozturk

Yasuo Uekita

Provided is an epoxy resin composition containing an epoxy resin (A), a curing agent (B) and an imidazole adduct-type curing accelerator (C), in which the curing agent (B) contains a compound (B-1) represented by formula (B-1) [Rrepresents a hydrogen atom, a halogen atom, a methoxy group or a hydrocarbon group having 1 to 12 carbon atoms] and a compound (B-2) represented by formula (B-2) [Rrepresents a hydrogen atom, a halogen atom, a methyl group or a methoxy group] and the content of the compound (B-2) is 2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the epoxy resin (A).

Epoxy resin composition and cured product thereof

An epoxy resin composition and a cured product thereof are provided, the epoxy resin composition comprising an epoxy resin (A), a curing agent (B) comprising a compound represented by the following formula (B-1) (wherein Rrepresents a hydrogen atom, a halogen atom, a methoxy group or a hydrocarbon group having 1 to 12 carbon atoms), and an imidazole adduct-type curing accelerator (C), wherein the molar ratio of the content of a phenolic hydroxide group to the content of an epoxy group in the epoxy resin composition is 0.25 to 0.67.

Use of S-(3-aminopropyl)thiosulfuric acid and/or a metal salt thereof for improving the viscoelastic properties of a vulcanized rubber.

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Toyonaka, Japan

Kenichi Takeuchi