Air drying latex coating composition curable under ambient conditions and method of providing same
AssigneeDeSoto, Inc.
InventorJohn J. Krajewski
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Abstract
An air drying latex coating composition, curable under ambient conditions, is described having copolymer particles consisting essentially of copolymerized monoethylenically unsaturated monomers dispersed in an aqueous emulsion. The copolymer particles have 0.5-30% by weight of ethylenically unsaturated monomers bonded thereto through reacted C.sub.1 -C.sub.6 N-alkylol functionalities. Curing agents or curing catalysts are also present to cure the deposited composition. The coating compositions are provided by forming an aqueous dispersion of the copolymer particles, bonding an ethylenically unsaturated monomer thereto through a C.sub.1 -C.sub.6 N-alkylol functionality, and admixing therein a curing catalyst or curing agent.
Claims23
An air drying latex coating composition which cures under ambient conditions comprising water having dispersed therein aqueous emulsion copolymer particles consisting essentially of copolymerized monoethylenically unsaturated monomers, the copolymer particles of said latex having ethylenic unsaturation provided by the reaction of reactive groups in the copolymer particles with a reactive ethylenically unsaturated monomer bonded thereto through a reacted C.sub.1 -C.sub.6 N-alkylol functionality, said unsaturated monomer which is bonded to the copolymer particles being present in an amount of about 0.5% to about 30% by weight of the copolymer, and a curing catalyst or curing agent incorporated in the latex to cause said unsaturation to react in a deposited coating to cure the same.
An air drying latex coating composition which cures under ambient conditions comprising water having dispersed therein aqueous emulsion copolymer particles consisting essentially of copolymerized monoethylenically unsaturated monomers, said copolymer particles having bonded thereto a plurality of groups having the formula:
- ##STR4## wherein X and Y are selected from --O-- or ##STR5## at least one of X and Y being ##STR6## R is hydrogen or C.sub.1 -C.sub.5 alkyl;
- and Z is the residue of an ethylenically unsaturated monomer having a single reactive group other than the ethylenic unsaturation;
- said Y and Z together comprising about 0.5% to about 30% by weight of the solids of said copolymer, and a curing catalyst or curing agent incorporated in the latex to cause said unsaturation to react in a deposited coating to cure the same.
A method of providing an air drying latex coating composition having ethylenic unsaturation comprising the steps of:
- forming an aqueous dispersion of copolymer particles consisting essentially of aqueous emulsion copolymerized monoethylenically unsaturated monomers, said copolymer particles having a plurality of reactive groups selected from the group consisting of alcoholic --OH, --C.dbd.OOH, --C.dbd.ONH--, .dbd.NOH, .dbd.N--NH--, .dbd.N--NHC.dbd.ONH-- and --C.dbd.ONA--OB, wherein A and B of said last listed reactive group are hydrogen or C.sub.1 -C.sub.4 alkyl, at least one one of A and B being hydrogen;
- reacting said copolymer particles with about 0.5% to about 30% by weight of the solids of said copolymer of an ethylenically unsaturated monomer selected from the group consisting of the N-methylol amides of acrylic acid, methacrylic acid, crotonic acid and allyl carbonic acid, and the N-methylol imide of maleic acid to form copolymer particles having a plurality of said ethylenically unsaturated monomers thereon;
- and
- admixing a curing catalyst or curing agent into said dispersion to cause said unsaturation to react in a deposited coating to cure the same.
Dependencies are inferred from the claim text.