C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/66 (2006.01) A63B 37/00 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01)
Patent
CA 2163487
This invention relates to rigid polyurethanes prepared by reaction, at an isocyanate index of 95 to 110, of (a) an allophanate-modified aliphatic and/or cycloaliphatic polyiso- cyanurate; (b) 20 to 100% by weight, relative to the total of components (b) and (c), of (i) one or more polyether and/or polyester polyols containing three or more isocyanate-reactive hydroxyl groups and having a molecular weight of 200 to 6000, and (ii) 0 to 30% by weight, relative to component (b)(i), of one or more isocyanate-reactive compounds other than a polyether or polyester of component (b)(i) and containing two or more isocyanate-reactive hydroxyl groups and having a molecular weight of about 400 to about 10,000, (c) 0 to 30% by weight, relative to the total of components (b) and (c), of a chain extender and/or crosslinker other than a polyether or polyester and having a molecular weight of from 32 to 399, wherein the amounts of components (b) and (c) total 100% by weight.
Mafoti Robson
Slack William E.
Bayer Corproation
Swabey Ogilvy Renault
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