Process for the production of optionally foamed polyurethanes wh

Coating processes – Foraminous product produced

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156 77, 156 78, 156 79, 264 455, 264 456, 427244, 427245, 427247, 4273855, 427389, 427392, 4273935, B05D 500, B05D 302, B32B 518

Patent

active

047613076

ABSTRACT:
The present invention is directed to a process for the production of optionally foamed polyurethanes which are combined or fabricated with another material, comprising reacting compounds with molecular weights from 400 to 10,000 containing at least 2 isocyanate reactive hydrogen atoms with polyisocyanates in the presence of catalysts containing tertiary amino groups and combining or fabricating the resulting polyurethane with another material, characterized in that the catalysts used are diffusion resistant aminoalkanols corresponding to the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or a C.sub.1 -C.sub.6 alkyl group,

REFERENCES:
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patent: 3503934 (1970-03-01), Chilvers
patent: 3622542 (1971-11-01), Klouman et al.
patent: 3725120 (1973-04-01), Suter
patent: 3954749 (1976-05-01), Priest et al.
patent: 4049931 (1977-09-01), Sandner et al.
patent: 4081578 (1978-03-01), Van Essen et al.
patent: 4510269 (1985-04-01), Kopp et al.

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