Method for aqueous polyurethane blocking reaction

Details Method for aqueous polyurethane blocking reaction Method for aqueous polyurethane blocking reaction

1996-05-16

1998-08-04

Gorr, Rachel

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 71, 2521822, 25218222, 524591, C08G 1880

Patent

active

057895180

ABSTRACT:
An improved method of reaction of water PU resins for improving the blocking reactions of beta-dicarbynal compounds and polisocynantes, and reducing the reaction time for water PU blocking, wherein the construction is: ##STR1## wherein: R.sub.1,R.sub.2,R.sub.3,R.sub.4 =hydrogen or alkyl group
n.sub.1 =1.about.100
n.sub.2, n.sub.3, n.sub.4 =1.about.10
The blocking agents of beta-Dicarbonyl compounds are reduced by D.sub.1 and D.sub.2 which are used in the blocking reactions of water PU.

REFERENCES:
patent: 5508370 (1996-04-01), Reiff et al.
patent: 5583176 (1996-12-01), Haberle

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