Liquid one component PU stoving enamels

Details Liquid one component PU stoving enamels Liquid one component PU stoving enamels

1996-09-03

1998-05-26

Cooney, Jr., John M.

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...

4284231, 4284258, 528 55, 528 59, 528 65, C08G 1874

Patent

active

057566348

ABSTRACT:
A liquid one-component PU stoving enamel is provided along with its synthesis, where the stoving enamel contains
a) a hydroxyl-containing polymer;
b) a partially or totally blocked isophorone-based polyisocyanate containing uretdione groups;
c) an organic bismuth compound catalyst, and
d) an organic solvent or mixture of two or more organic solvents,
wherein components a and b are present in a total (a+b) amount of from 40 to 70 parts by weight based on total composition weight, component c is present in an amount of from 0.5 to 5 parts by weight based on total composition weight; and component d is present in an amount of from 30 to 60 parts by weight based on total composition weight; and
wherein a and b are each present in amounts sufficient to provide an OH/NCO equivalents ratio of from 0.8 to 1.2 NCO equivalents of component b per OH equivalent of component a.

REFERENCES:
patent: 5143994 (1992-09-01), Laas et al.
patent: 5330839 (1994-07-01), Yasuoka et al.
patent: 5461135 (1995-10-01), Malofsky et al.
patent: 5541279 (1996-07-01), Gras et al.

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