Toray Industries, Inc.

Dow Corning Corporation

Director-general of Agency of Industrial Science and Technology

Mitsubishi Petrochemical Company Limited

Mitsubishi Yuka Fine Chemicals Co., Ltd.

Kuniaki Tobukuro

Gerald A Gornowicz

Gary T Decker

Nobuyuki Odagiri

Hajime Kishi

Kaoru Kanayama

Tosio Sugimoto

Tadahide Sato

A cured resin product has a strain energy release rate (GIC) of at least 400 J/m.sup.2, a flexural modulus of at least 300 Kg/mm.sup.2, and a glass transition temperature (Tg) of at least 120.degree. C. The cured resin composition comprises a thermoset resin component (A), optionally including a curing agent (B), and a thermoplastics resin component (C), the thermoplastics resin and thermoset resin components (C) and (A) being present at least partly in respective phases (1) and (2) each being elongate in at least one direction and each preferably having a three dimensionally continuous structure. Phase (1) may contain a silicon containing compound providing a concentration therein of elemental silicon higher than that in any other phase, and/or the cured resin product may additionally include regions where one of the phases (1) and (2) essentially surrounds the other. The thermoplastics resin (C) may be a block or graft copolymer comprising a molecular chain compatible with, and molecular chain incompatible with, the thermoset resin (A). A composition containing the above components (A) to (C) may be compounded with fibrous reinforcement to provide a prepreg curable to obtain a high strength fiber reinforced plastics material.

Thermosetting resin composition, cured resin product, prepreg and

A process for preparing a cured, fiber-reinforced composite comprises (I) blending an aminofunctional silicone resin containing monophenyl siloxy units and aminofunctional siloxy units, an epoxy resin and a hardener for the epoxy resin such as an aromatic diamine, (II) impregnating reinforcing fibers with the blend, (III) laying up at least two layers of the impregnated fibers, and (IV) heating the layed-up laminate at a temperature and time sufficient to cure the epoxy resin.

Preparing epoxy resin/hardener/aminopolysiloxane composite

A cured, fiber-reinforced composite is prepared by blending an amino-functional silicone resin containing monophenyl siloxy units and amino-functional siloxy units, an epoxy resin, a hardener for the epoxy resin and an aromatic oligomer such as a polyether optionally with reactive primary amine groups, impregnating fibers into said blend, laying up at least two layers of the impregnated fibers, and heating the layed-up laminate at a temperature and time sufficient to cure the epoxy resin.

Preparing epoxy resin/aminopolysiloxane/aromatic oligomer composite

A fiber-reinforced composite is prepared from fibers embedded in a composition comprising cured epoxy resin(s), an aromatic oligomer such as a polyether optionally with reactive primary amine groups, and an amino-functional silicone resin with monophenyl siloxy units and amino-functional siloxy units.

Epoxy resin/aminopolysiloxane/aromatic oligomer composite

A fiber-reinforced composite is prepared from fibers embedded in a cured epoxy resin(s) containing therein a amino-functional silicone resin with monophenyl siloxy units and amino-functional siloxy units.

Epoxy resin/aminofunctional polysiloxane fiber-reinforced composite

This invention relates to certain new high modulus silicones, toughened epoxy thermoset resin systems made from those silicones, and composites that are prepared from the new toughened epoxy resin systems. The silicone resins are specifically monophenyl-containing polysiloxanes.

High modulus silicones as toughening agents for epoxy resins

Endcapping agent for polyimide, polyimide varnish, and intermediate

Disclosed in an alicyclic end-capping agent for a heterocyclic compound, which is represented by the formula [I]: ##STR1## wherein X is CO, O, S, CH.sub.2 or substituted CH.sub.2, Y.sub.1 -Y.sub.6 are halo, H, NO.sub.2, aryl, alkaryl, arylalkyl or alkyl ether, and Z is ##STR2## (Q.sub.1 is --NH.sub.2, --SH, --OH or ##STR3## (Q.sub.2 is H, or monovalent aliphatic or amomatic group). Also disclosed is an addition-curable quinoxaline resin oligomer having the above-mentioned alicylic end-capping agents at both terminals of oligomer. This oligomer is useful especially for an intermediate material for a fiber-reinforced composite.

Reactive end-capping agent, addition-curable quinoxaline resin oligomer

Disclosed is an alicylic end-capping agent for a heterocyclic compound, which is represented by the formula [I]: ##STR1## wherein X is CO, O, S, CH.sub.2 or substituted CH.sub.2, Y.sub.1 -Y.sub.6 are halo, H, NO.sub.2, aryl, alkaryl, arylalkyl or alkyl ether, and Z is ##STR2## (Q.sub.1 is --NH.sub.2, --SH, --OH or ##STR3## (Q.sub.2 is H, or monovalent aliphatic or amomatic group). Also disclosed is an addition-curable quinoxaline resin oligomer having the above-mentioned alicylic end-capping agents at both terminals of oligomer. This oligomer is useful especially for an intermediate material for a fiber-reinforced composite.

Addition-curable quinoxaline resin oligomer and intermediate material

1. An epoxy resin composition is described, comprising

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Otsu, Japan

Kuniaki Tobukuro