Nippon Shokubai Kagaku Kogyo Co., Ltd.

Takao Omi

Kenichi Ueda

Toshio Awaji

A resin composition useful as a matrix resin for a composite material comprises (A) from 30-80% by weight of an amino group-containing unsaturated ester compound obtained by ring-opening addition reacting an epoxy group-containing unsaturated compound (c) with an aromatic polyamine (a) or diamine (b) in an equivalent weight ratio of compound (c) to amino hydrogen atom of polyamine (a) or diamine (b) of from 0.25-0.9:1, (B) from 10-60% by weight of a polyepoxy compound, and (C) from 5-60% by weight of a radically polymerizable cross-linking agent such as p-methyl styrene.

Resin composition

A heat-resistant resin composition, comprising (A) 30 to 95% by weight of at least oen unsaturated ester compound selected from the group consisting of (I) unsaturated ester compounds represented by the formula I: ##STR1## wherein R.sup.1 s independently stand for one member selected from the class consisting of ##STR2## wherein R.sup.3 and R.sup.4 independently stand for a hydrogen atom or a methyl group, and a hydrogen atom, and at least one R.sup.1 stands for ##STR3## wherein R.sup.3 and R.sup.4 independently stand for a hydrogen atom or a methyl group, and R.sup.2 s independently stand for an atom or an organic group selected from the class consisting of a hydrogen atom, halogen atoms, a methoxy group, and alkyl groups of 1 to 5 carbon atoms, and m stands for 0 or an integer in the range of 1 to 10, and (II) unsaturated ester compounds represented by the formula II; ##STR4## wherein R.sup.5 s independently stand for one member selected from the class consisting of ##STR5## wherein R.sup.3 and R.sup.4 independently stand for a hydrogen atom or a methyl group, and a hydrogen atom, at least one R.sup.5 stands for ##STR6## wherein R.sup.3 and R.sup.4 independently stand for a hydrogen atom or a methyl group, R.sup.6 s independently stand for an atom or an organic group selected from the class consisting of a hydrogen atom, halogen atoms, a methoxy group, and alkyl groups of 1 to 5 carbon atoms, n stands for 0 or an integer in the range of 1 to 10, and X stands for a divalent organic group selected from the class consisting of ##STR7## where n is 0 or X's independently stand for a divalent organic group selected from the class consisting of ##STR8## wherein n is an integer in the range of 1 to 10, (B) 70 to 5% by weight of a polymerizable crosslinking agent, and (C) 0.,5 to 15 parts by weight, based on 100 parts by weight of a vinyl ester resin composed of (A) said unsaturated ester compound and (B) said polymerizable crosslinking agent, of a butadiene-acrylonitrile copolymer having at least one (meth)acryloyl group in the molecular unit thereof.

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Nishinomiya, Japan

Takao Omi