Thermosetting acrylic emulsions based on n-methylol allyl carbamates

Claim 2

A thermosetting acrylic emulsion comprising water having dispersed therein an emulsion copolymer of monoethylenic monomers at least 65% of which are nonreactive acrylic monomers, and from 0.2-15% of reactive monomers at least about one-third of which are an N-methylol derivative, or a C 1 - C 8 alcohol ether thereof, of an allyl carbamate having the formula: ##EQU4## in which R 1 is hydrogen or methyl, R 2 is an alkylidene group containing from 2-4 carbon atoms, and n is an integer from 0-10.

Claim 3

An emulsion as recited in claim 1 in which said acrylic monomers constitute at least 85% of the copolymer.

Claim 4

An emulsion as recited in claim 1 in which at least 75% of the acrylic monomers are C 1 - C 8 alcohol esters of alpha, beta-monoethylenically unsaturated monocarboxylic acids.

Claim 5

An emulsion as recited in claim 1 in which said acrylic monomers constitute at least 85% of the copolymer, and at least 75% of the acrylic monomers are C 1 - C 8 alcohol esters of acrylic acid or methacrylic acid providing a T g below 20°C.

Claim 6

An emulsion as recited in claim 4 in which the copolymer has a T g below 0°C. down to about -60°C.

Claim 7

An emulsion as recited in claim 5 in which the N-methylol derivative or the ether thereof is a derivative of N-methylol allyl carbamate and said reactive monomers are present in an amount of from 0.5-10%.

Claim 8

An emulsion as recited in claim 6 in which the propyl or butyl ether of N-methylol allyl carbamate is used.

Claim 9

An emulsion as recited in claim 6 in which said emulsion copolymer is formed by subjecting at least the first 35% of the monomers to an essentially adiabatic exotherm.

Claim 10

An emulsion as recited in claim 1 in which said emulsion further includes an aminoplast resin.

Claim 11

A thermosetting acrylic emulsion comprising water having dispersed therein an emulsion copolymer consisting essentially of at least 65% of C 1 - C 8 alcohol esters of acrylic or methacrylic acids and from 0.5-10% of reactive monomers at least about one-third of which are an N-methylol derivative, or a C 1 - C 8 alcohol ether thereof, of allyl or methallyl carbamate, any balance of said copolymer being selected from acrylonitrile, styrene, vinyl toluene, vinyl acetate, vinyl chloride and vinylidene chloride, said copolymer having a T g below 20°C.

Claim 12

A thermosetting acrylic emulsion comprising water having dispersed therein an emulsion copolymer consisting essentially of at least 65% of C 1 - C 8 alcohol esters of acrylic or methacrylic acids and from 0.5-10% of reactive monomers at least about one-third of which are an N-methylol derivative, or a C 1 - C 8 alcohol ether thereof, of allyl or methallyl carbamate, any balance of said copolymer being selected from acrylonitrile, styrene, vinyl toluene, vinyl acetate, vinyl chloride and vinylidene chloride, said copolymer having a T g below 20°C.

Claim 13

An emulsion as recited in claim 10 in which said copolymer comprises methyl methacrylate, and a butyl acrylate providing a T g of from about -20°C. to about 15°C.

Claim 14

An emulsion as recited in claim 11 in which said N-methylol derivative is the propyl ether of N-methylol allyl carbamate.