C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/66 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C09K 3/10 (2006.01) D06N 3/14 (2006.01)
Patent
CA 2146670
A method of preparing polyurethane urea elastomers by reacting polyisocyanates and polyester and/or polycarbonate polyol reaction products containing terminal NCO groups and having a molecular weight of 400 to 10,000 with finely divided diamino diphenyl ureas having the general formula Image in which the NH2 groups are in the meta position relative to the urea group and R1, R2, R3, R4 (which may be the same or different) denote H or C1 - C6-alkyl radicals, in which organic and/or inorganic acid chlorides in a proportion greater than 200 ppm relative to the NCO pre-adduct are added in order to stabilise the reactive mixture of one or both components before premixing.
Barnes Michael
Grogler Gerhard
Heß Heinrich
Kopp Richard
Ruckes Andreas
Aktiengesellschaft Bayer
Swabey Ogilvy Renault
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