Water reducible quaternary ammonium salt containing polymers

Claim 2

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 1 is H or alkyl of 1 to 3 carbons, Z is N--H or O; R 2 is a divalent methylene radical --(CH 2 ) n -- wherein n is an integer from 1 to about 10; R 3 and R 4 can be the same or different and are alkyl, substituted alkyl, aryl, or substituted aryl, and R 5 and R 6 can be the same or different and are hydrogen, alkyl, substituted alkyl, aryl or substituted aryl; and X - 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.

Claim 3

The composition of claim 1 further characterized in that the active hydrogen functional monomer is a hydroxy functional monomer.

Claim 4

The composition of claim 1 further characterized in that the acrylic polymer contains styrene.

Claim 5

The composition of claim 1 further characterized in that the quaternary ammonium salt containing monomer has the structure: ##STR8##

Claim 6

The composition of claim 1 further characterized in that the acrylic polymer contains styrene.

Claim 7

The composition of claim 1 further characterized in that the blocked polyisocyanate is present at a level of about 0.3 to about 3.0 equivalents of isocyanate for each equivalent of active hydrogen.

Claim 8

The composition of claim 1 further characterized in that the blocked polyisocyanate is the reaction product of an organic polyisocyanate and a blocking agent selected from the group consisting of oximes, lactams, hydroxamic acid esters, and active methylene blocking agents.

Claim 9

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 1 is H or alkyl of 1 to 3 carbons, Z is N--H or O; R 2 is alkyl of 1 to about 10 carbons or aryl of 6 to about 10 carbons; R 3 and R 4 can be the same or different and are alkyl, substituted alkyl, aryl, or substituted aryl, and R 5 and R 6 can be the same or different and are hydrogen, alkyl, substituted alkyl, aryl or substituted aryl; and X - 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.

Claim 10

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 1 is H or alkyl of 1 to 3 carbons, Z is N--H or O; R 2 is alkyl of 1 to about 10 carbons or aryl of 6 to about 10 carbons; R 3 and R 4 can be the same or different and are alkyl, substituted alkyl, aryl, or substituted aryl, and R 5 and R 6 can be the same or different and are hydrogen, alkyl, substituted alkyl, aryl or substituted aryl; and X - 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.

Claim 11

The composition of claim 8 further characterized in that the active hydrogen functional monomer is a hydroxy functional monomer.

Claim 12

The composition of claim 8 further characterized in that the acrylic polymer contains styrene.

Claim 13

The composition of claim 8 further characterized in that the quaternary ammonium salt containing monomer has the structure: ##STR10##

Claim 14

The composition of claim 8 further characterized in that the acrylic polymer contains styrene.

Claim 15

The composition of claim 8 further characterized in that the blocked polyisocyanate is present at a level of about 0.3 to about 3.0 equivalents of isocyanate for each equivalent of active hydrogen.

Claim 16

The composition of claim 8 further characterized in that the blocked polyisocyanate is the reaction product of an organic polyisocyanate and a blocking agent selected from the group consisting of oximes, lactams, hydroxamic acid esters, and active methylene blocking agents.