Novel thermosetting resin composition and cured product therefrom
AssigneeHitachi, Ltd.
InventorsAkio Nishikawa, Hitoshi Yokono, Shun-ichi Numata, Junji Mukai
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Abstract
A novel thermosetting resin composition consisting essentially of (a) an isocyanate group-terminated condensate obtained by reacting a polycarboxylic acid compound having at least one acid anhydride ring with a stoichiometrical excess of a polyfunctional isocyanate compound or said condensate containing the unreacted isocyanate compound, (b) a polyfunctional epoxy compound and (c) a catalyst which forms mainly isocyanurate rings and oxazolidone rings. A cured product having excellent thermal resistance and excellent high temperature strength can be obtained by heating said composition.
Claims8
A thermosetting resin composition consisting essentially of (a) an isocyanate group-terminated condensate obtained by reacting a polycarboxylic acid compound having at least one acid anhydride ring with a stoichiometric excess of a polyfunctional isocyanate compound or said condensate containing the unreacted isocyanate compound, (b) a polyfunctional epoxy compound, the isocyanate group-terminated condensate or said condensate containing the unreacted isocyanate compound being present in an equivalent ratio of isocyanate compound to the polyfunctional epoxy compound of 0.2 :
- 1 to 4 :
- 1, and (c) a catalyst which forms mainly isocyanurate rings and oxazolidone rings selected from the group consisting of tertiary amine tetraphenylborates, N-substituted morpholine tetraphenylborates, imidazole tetraphenylborates and onium salt tetraphenylborates, the amount of said catalyst being from abojut 0.01 to 10% by weight based on the weight of the condensate and the polyfunctional epoxy compound.
A cured product produced by heating at a temperature of 150.degree. C or more a thermosetting resin composition consisting essentially of (a) an isocyanate group-terminated condensate obtained by reacting a polycarboxylic acid compound having at least one acid anhydride ring with a stoichiometric excess of a polyfunctional isocyanate compound or said condensate containing the unreacted isocyanate compound, (b) a polyfunctional epoxy compound, the isocyanate group-terminated condensate or said condensate containing the unreacted isocyanate compound being present in an equivalent ratio of isocyanate compound to the polyfunctional epoxy compounds of 0.1 :
- 1 to 4 :
- 1, and (c) a catalyst which forms mainly isocyanurate rings and oxazolidone rings selected from the group consisting of tertiary amine tetraphenylborates, N-substituted morpholine tetraphenylborates, imidazole tetraphenylborates and onium salt tetraphenylborates and the amount of said catalyst being from about 0.01 to 10% by weight based on the weight of the condensate and the polyfunctional epoxy compound.
Dependencies are inferred from the claim text.