C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/106, 400/590
C08G 18/08 (2006.01) C08G 18/40 (2006.01) C08J 9/00 (2006.01) C08L 75/08 (2006.01)
Patent
CA 1257443
STABLE DISPERSIONS OF POLYUREAS AND/OR POLYHYDRAZODI- CARBONAMIDES IN RELATIVELY HIGH MOLECULAR WEIGHT, HYDROXYL GROUP-CONTAINING COMPOUNDS, PROCESS FOR THE PRODUCTION THEREOF AND USE THEREOF FOR THE PRODUCTION OF POLYURETHANES ABSTRACT OF THE DISCLOSURE The present invention is directed to a stable dispersion of a polyurea and/or a polyhydrazodicarbon- amide having a solids content of from 5 to 40%, by weight, in a relatively high molecular weight, hydroxyl group-containing polyether, obtained by continuously reacting: (a) an organic di- and/or polyisocyanate with (b) an amine-functional material selected from the group consisting of (i) primary and/or secondary amino group-containing di- and/or polyamines, (ii) hydrazines, (iii) hydrazides and (iv) mixtures there- of in (c) said polyether at an equivalent ratio of components (a) to (b) of from 1.051:1 to 1.50:1 in a throughflow mixer in such a quantity that the average residence time of the re- action components in the mixer is less than 10 minutes and collecting the reaction product issuing from the throughflow mixer in a receiver optionally with heating to from 50 to 150°C and optionally with subsequent stirring. The invention also relates to the production and use of such dispersions.
498117
Dietrich Manfred
K"onig Klaus
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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