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Trimer catalyst system for aliphatic and aromatic isocyanates
Trimer catalyst system for aliphatic and aromatic isocyanates
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机译:脂族和芳族异氰酸酯的三聚体催化剂体系
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摘要
This invention relates to a novel trimerization catalyst system, and to a process for trimerizing organic polyisocyanates in the presence of thermally active catalyst systems. These catalyst systems comprise (A) compounds selected from the group consisting of (i) lithium salts of aliphatic or aromatic carboxylic acids, (ii) lithium salts of hydroxyl group containing compounds wherein the hydroxyl groups are directed attached to an aromatic ring, and (iii) lithium hydroxide; (B) an allophanate catalyst; and (C) an organic compound which contains at least one hydroxyl group.
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