Preparation of cellular plastics by the polyisocyanate...

Details Preparation of cellular plastics by the polyisocyanate... Preparation of cellular plastics by the polyisocyanate...

C - Chemistry, Metallurgy

08

G

C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/30 (2006.01) C08G 18/48 (2006.01) C08G 18/65 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2045192

A process for the preparation of cellular plastics, preferably hard structural poly- urethane foams, by the polyisocyanate polyaddition process involves reacting a) an organic and/or modified organic polyisocyanate with b) at least one high-molecular-weight compound contain- ing at least two reactive hydrogen atoms and, if desired, c) a low-molecular-weight chain extender and/or cross- linking agent, in the presence of d) a blowing agent from the group comprising tertiary alcohols (di), preferably tertiary butanol, or a mixture of at least one tertiary alcohol (di) and water (dii), e) a catalyst and, if desired, f) assistants and/or additives.

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