C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/08 (2006.01) C08G 18/09 (2006.01) C08G 18/28 (2006.01) C08G 18/65 (2006.01) C08G 18/67 (2006.01)
Patent
CA 2050226
O.Z. 0050/41852 Abstract of the Disclosure: A process for the preparation of a hard foam containing urethane groups or containing urethane and isocyanurate groups 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, e) a catalyst and, if desired, f) assistants and/or additives, where the blowing agent (d) used is at least one organic carboxylic acid, preferably an aliphatic monocarboxylic acid, alone or in combination with water and/or a physi- cal blowing agent, and the catalyst (e) used is a poly- isocyanurate catalyst, preferably an alkali metal salt or ammonium salt of an organic carboxylic acid or tris(di- alkylaminoalkyl)-s-hexahydrotriazine.
Hartwig Uwe
Kessler Hansjuergen
Ropte Eckhard
Basf Aktiengesellschaft
Hartwig Uwe
Kessler Hansjuergen
Robic
Ropte Eckhard
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