BLOCKED POLYISOCYANATE COMPOSITION, PREPOLYMER COMPOSITION, AND METHOD OF MANUFACTURING THEM, AND THERMALLY DISSOCIATIVE BLOCKING AGENT FOR BLOCKED POLYISOCYANATE COMPOSITION

摘要

A prepolymer composition and a method for manufacturing them each of which is able to impart a low temperature thermosetting property surpassing the prepolymer of the phenolic resin to a prepolymer as a mixture of a blocked polyisocyanate compound and a polyisocyanate reactive compound, while suppressing generation of a toxic gas impacting on the environment and an unpleasant odor at the time of manufacturing or at the time of thermal curing, and each of which is capable of providing a thermosetting plastic as a thermally cured product thereof to the market at a cost comparable to the phenolic resin, while restraining divergence of the formaldehyde.

主权项

1. A blocked polyisocyanate composition synthesized from a polyisocyanate compound and a thermally dissociative blocking agent,
characterized in that the thermally dissociative blocking agent is at least one kind of thermally dissociative blocking agent selected from a group consisting of a carbonate of an alkali metal, a hydrogen carbonate of an alkali metal, a percarbonate of an alkali metal, a phosphate of an alkali metal, a hydrogen phosphate salt of an alkali metal, a dihydrogen phosphate salt of an alkali metal, a carbonate of an ammonium, a hydrogen carbonate of an ammonium, a percarbonate of an ammonium, a phosphate of an ammonium, a hydrogen phosphate salt of an ammonium, and a dihydrogen phosphate salt of an ammonium.