Water reducible quaternary ammonium salt containing polymers

Claim 2

A water dispersible 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: ##STR8## 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 from 1 to about 10; R 3 , R 4 and R 5 can be the same or different and are alkyl, substituted alkyl, aryl or substituted aryl, with the proviso that R 3 , R 4 and R 5 cannot be hydroxy functional; 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 containing 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 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 6

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 7

The composition of claim 5 further characterized in that the blocking agent is benzylmethyacrylohydroxamate.

Claim 8

The composition of claim 1 further characterized in that the quaternary ammonium salt containing monomer is: ##STR9##

Claim 9

The composition of claim 1 further characterized in that the quaternary ammonium salt containing monomer is: ##STR10##

Claim 10

The composition of claim 1 further characterized in that the quaternary ammonium salt containing monomer is: ##STR11##

Claim 11

A water dispersible coating composition 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: ##STR12## 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 from 1 to about 10; R 3 , R 4 , and R 5 can be the same or different and are alkyl, substituted alkyl, aryl or substituted aryl, with the proviso that R 3 , R 4 and R 5 cannot be hydroxy functional; 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 12

A water dispersible coating composition 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: ##STR12## 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 from 1 to about 10; R 3 , R 4 , and R 5 can be the same or different and are alkyl, substituted alkyl, aryl or substituted aryl, with the proviso that R 3 , R 4 and R 5 cannot be hydroxy functional; 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 13

The composition of claim 10 further characterized in that the active hydrogen containing monomer is a hydroxy functional monomer.

Claim 14

The composition of claim 10 further characterized in that the acrylic polymer contains styrene.

Claim 15

The composition of claim 10 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 10 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 17

The composition of claim 14 further characterized in that the blocking agent is benzylmethyacrylohydroxamate.

Claim 18

The composition of claim 10 further characterized in that the quaternary ammonium salt containing monomer is: ##STR13##

Claim 19

The composition of claim 10 further characterized in that the quaternary ammonium salt containing monomer is: ##STR14##

Claim 20

The composition of claim 10 further characterized in that the quaternary ammonium salt containing monomer is: ##STR15##