Permanently stabilized polyurethanes

Details Permanently stabilized polyurethanes Permanently stabilized polyurethanes

C - Chemistry, Metallurgy

08

G

402/139, 260/488

C08G 18/38 (2006.01) C08G 18/10 (2006.01) C08G 18/32 (2006.01)

Patent

CA 1109593

PERMANENTLY STABILIZED POLYURETHANES Abstract of the Disclosure According to the invention there are obtained modified poly- urethanes which have a durable, wash-fast, acid-resistant, cleaning-resistant and solvent-resistant stabilization on the basis of 2,2,6,6-tetraalkyl-piperidine light protective agents. The stabilizers are integral constituents of the polyurethanes, that is to say they are built into the polyurethane chain by a chain lengthening reaction in which two H-active reactive groups (preferably from the series of primary or secondary amino groups, carboxylic acid hydrazide, carbazic ester or semicarbazide groups) of a 2,2,6,6-tetraalkyl piperidine derivative react with isocyanate groups of polyisocyanates or isocyanate prepolymers, optionally in the presence of the usual chain lengthening agents.

287017

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