Reaction of 2.degree. beta-hydroxyalklamine with polyisocyanate

Details Reaction of 2.degree. beta-hydroxyalklamine with polyisocyanate Reaction of 2.degree. beta-hydroxyalklamine with polyisocyanate

1988-12-21

1991-02-05

Jacobs, Lewis T.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

523415, 528 45, C08L 6302, C08G 5940

Patent

active

049905791

ABSTRACT:
Crosslinking cationic paint binders, preferably cathodically depositable paint binders comprising (poly)-2-hydroxyalkylurea compounds as a crosslinking agent are described. The 2-hydroxyalkylureas are obtained by reacting organic polyisocyanates with secondary beta-hydroxyalkylamines. The crosslinking agents of the invention permit film formation in the stoving range of about 140.degree. C., which is particularly favorable for water-based paints. Additionally, selective semi-blocking which is made possible through the difference in reactively between the NCO-groups of individual polyisocyanates is enhanced through use of the secondary amino groups, in comparison to through use of hydroxyl groups which are conventionally used.

REFERENCES:
patent: 4260727 (1981-04-01), Floyd
patent: 4356276 (1982-10-01), Honig et al.
patent: 4376687 (1983-03-01), Miyake et al.
patent: 4522986 (1985-06-01), Short et al.
patent: 4777225 (1988-10-01), Paar
patent: 4837291 (1989-06-01), Paar

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