C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/111, 402/133
C08G 18/70 (2006.01) C08G 18/76 (2006.01)
Patent
CA 2032716
The present invention relates to polyisocyanate mixtures of (A) 21 to 95% by weight of toluene diisocyanate and (B) 5 to 79% by weight of a mixture of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates containing (1) 55 to 87% by weight of 4,4'-diphenylmethane diisocyanate, (2) 8 to 30% by weight of 2,4'-diphenylmethane diisocyanate, (3) 0 to 4% by weight of 2,2'-diphenylmethane diisocyanate, and (4) 5 to 35% by weight of polyphenyl polymethylene polyisocyanates. The invention also relates to a process for preparing flexible polyurethane foams in which polyisocyanate mixtures of the invention are used as the polyisocyanate component.
Gansen Peter
Kogelnik Hans-Joachim
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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