C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/106, 403/31
C08G 18/40 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08J 9/00 (2006.01)
Patent
CA 2037082
Mo-3539 LeA 27,530 STABLE DISPERSIONS OF POLYUREAS AND/OR POLYHYDRAZODICARBONAMIDES IN RELATIVELY HIGH MOLECULAR WEIGHT COMPOUNDS CONTAINING AT LEAST ONE HYDROXYL GROUP, A PROCESS FOR THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF POLYURETHANE PLASTICS ABSTRACT OF THE DISCLOSURE This invention relates to a stable dispersion of polyurea and/or polyhydrazodicarbonamide in a relatively high molecular weight compound having a molecular weight of 200 to 16,000, and containing at least one hydroxyl group which is a reaction product of polyisocyanate with a polyamine containing primary, and/or secondary amino groups and/or a hydrazine and/or a hydrazide in a relatively high molecular weight compound containing at least one hydroxyl group,the improvement comprising the stable dispersion of low viscosity wherein the polyisocyanate is characterized in that it is a mixture of diphenyl methane diisocyanate and a polyphenyl polymethylene polyisocyanate consisting of 50 to 95% by weight 4,4'-diphenyl methane diisocyanate 5 to 60% by weight 2,4'-diphenyl methane diisocyanate 0 to 4% by weight 2,2'-diphenyl methane diisocyanate, and 0 to 30% by weight of a polyphenyl polymethylene polyisocyanate.
Dietrich Manfred
Gansen Peter
Aktiengesellschaft Bayer
Swabey Ogilvy Renault
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