To provide a new indene-hydroxystyrene copolymer and to provide a method for producing the copolymer and an epoxy resin composition comprising the copolymer compounded therein.
The indene-containing copoloymer is a copolymer comprising 1-99 mol% of an indene structural unit and 99-1 mol% of a hydroxystyrene structural unit. The copolymer is produced by polymerizing a monomer component composed of indenes and alkoxystyrenes in the presence of a halogen compound catalyst represented by MXn (wherein, M denotes an atom selected from groups 13-15 of the periodic table; Xs denote each a halogen atom; and n denotes an integer of 3-5) in a halogenated organic solvent or an aromatic organic solvent at -100 to 100°C temperature, providing a polymer and then carrying out a deprotection reaction in the presence of an acid. The copolymer or resin composition affords an epoxy resin cured product having improved heat resistance, low water absorption, dielectric characteristics, processability and adhesion.
MISUMI YUKIHIRO
Tomohiro Nakamura
Eiichi Sano
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