Method of producing blocked polyisocyanates by reaction of an im

Details Method of producing blocked polyisocyanates by reaction of an im Method of producing blocked polyisocyanates by reaction of an im

1978-06-30

1980-04-29

Welsh, Maurice 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 59, 528 73, 548349, 548352, C08G 1880

Patent

active

042007259

ABSTRACT:
This invention relates to blocked isocyanates and to a method for making blocked isocyanates by blocking the isocyanate groups of a polyisocyanate, which may be chain extended, with a cyclic amidine compound of the formula ##STR1## where the R's are the same or different substituents inert to isocyanate groups.

REFERENCES:
patent: 2952665 (1960-09-01), Bunge et al.
patent: 3676402 (1972-07-01), Matsui et al.
patent: 3887476 (1975-06-01), McConnell
patent: 4046744 (1977-07-01), Jenkins

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