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US 4,444,954 AGranted
Water reducible quaternary ammonium salt containing polymers
AssigneeThe Sherwin-Williams Company
InventorsSherman J. Mels, Brian C. Petrie, Richard J. Pokusa
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Abstract
This invention relates to a water dispersible coating composition which comprises: (i) an acrylic polymer having active hydrogen functionality and quaternary ammonium salt functionality; and (ii) a blocked polyisocyanate. The water dispersible coating composition of this invention can be applied by any means known within the coatings art, but is especially suited for use in cathodic electrodeposition.
Claims14
A water reducible coating composition which comprises:
- (i) an acrylic polymer which comprises the free radical addition product of (a) at least one quaternary ammonium salt containing unsaturated monomer having the structure:
- ##STR7## wherein R.sub.1 is H or alkyl of 1 to 3 carbons, Z is N--H or O;
- R.sub.2 is a divalent methylene radical --(CH.sub.2).sub.n -- wherein n is an integer from 1 to about 10;
- R.sub.3 and R.sub.4 can be the same or different and are alkyl, substituted alkyl, aryl, or substituted aryl, and R.sub.5 and R.sub.6 can be the same or different and are hydrogen, alkyl, substituted alkyl, aryl or substituted aryl;
- and X.sup.- is an anion;
- and (b) at least one active hydrogen functional unsaturated monomer;
- and (c) at least one other ethylenically unsaturated monomer;
- and
- (ii) a blocked polyisocyanate which is stable in the presence of the acrylic polymer at room temperature but reactive with the acrylic polymer at elevated temperatures.
6 more elements
A water reducible coating which comprises:
- (i) an acrylic polymer which comprises the free radical addition product of (a) from about 1 to about 10 percent of at least one quaternary ammonium salt containing unsaturated monomer having the structure:
- ##STR9## wherein R.sub.1 is H or alkyl of 1 to 3 carbons, Z is N--H or O;
- R.sub.2 is alkyl of 1 to about 10 carbons or aryl of 6 to about 10 carbons;
- R.sub.3 and R.sub.4 can be the same or different and are alkyl, substituted alkyl, aryl, or substituted aryl, and R.sub.5 and R.sub.6 can be the same or different and are hydrogen, alkyl, substituted alkyl, aryl or substituted aryl;
- and X.sup.- is an anion;
- and (b) from about 1 to about 20 percent of at least one tertiary amine containing unsaturated monomer;
- and (c) from about 5 to about 30 percent of at least one active hydrogen functional unsaturated monomer;
- and (d) from about 40 to about 93 percent of at least one other ethylenically unsaturated monomer;
- and
- (ii) a blocked polyisocyanate which is stable in the presence of the acrylic polymer at room temperature but reactive with the acrylic polymer at elevated temperatures.
7 more elements
Dependencies are inferred from the claim text.