Blocked polyisocyanates with improved thermal stability

Details Blocked polyisocyanates with improved thermal stability Blocked polyisocyanates with improved thermal stability

1995-05-23

1996-10-01

Seidleck, James J.

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 68, 528 75, 528 84, 560 34, 560125, 560155, 564 32, C08G 1880, C07C22924, C07C27516, C07C27542

Patent

active

055612113

ABSTRACT:
The present invention relates to blocked polyisocyanates containing at least two isocyanate groups which are reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least two isocyanate groups in the form of urea groups, which may be subsequently converted to thermally stable hydantoin groups. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing at least two isocyanate-reactive groups.

REFERENCES:
patent: 3549599 (1970-12-01), Merten
patent: 3639418 (1972-02-01), Merten
patent: 4702953 (1987-10-01), Jonas et al.
patent: 5126170 (1992-06-01), Zwiener et al.
patent: 5236741 (1993-08-01), Zwiener et al.
patent: 5243012 (1993-09-01), Wicks et al.
patent: 5412056 (1995-05-01), Zwiener et al.
patent: 5461135 (1995-10-01), Malofsky et al.
patent: 5506327 (1996-04-01), Yonek et al.

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