Aqueous emulsion adhesives based on C.sub.2 -C.sub.8 ethers of N-methylol amides copolymerized with vinyl esters in the presence of hydroxy functional protective colloids
AssigneeChas. S. Tanner Co.
InventorMartin K. Lindemann
Life of this patent
Estimating the term…
Abstract
Vinyl esters, such as vinyl acetate, are copolymerized, especially with ethylene or maleate or fumarate diester, to provide adhesives which develop water resistance through cure by including in the copolymer at least 0.5% of an N-methylol functional monoethylenic amide monomer etherified with a C.sub.2 -C.sub.8 volatile, alcohol. The monomers are stabilized during the copolymerization by an hydroxy functional protective colloid.
Claims12
An aqueous adhesive emulsion which develops water resistance through cure, the water of said emulsion having emulsified therein an aqueous emulsion copolymer consisting essentially of monoethylenic monomers, at least 40% up to 99.5% of the copolymer being vinyl ester of a saturated aliphatic monocarboxylic acid having up to 18 carbon atoms and from 0.5-15% of the copolymer of monomers providing thermosetting characteristics and consisting essentially of an N-methylol derivative of acrylamide or methacrylamide etherified with a C.sub.2 - C.sub.8 alcohol, any balance of said copolymer consisting essentially of nonreactive monoethylenic monomers copolymerizable with said vinyl ester, the monomers of said copolymer being emulsified during copolymerization by from 0.05% to 10% of an hydroxy functional protective colloid selected from the group consisting of polyvinyl alcohol and hydroxy ethyl cellulose.
An aqueous adhesive emulsion which develops water resistance through cure, the water of said emulsion having emulsified therein an aqueous emulsion copolymer consisting essentially of monoethylenic monomers, at least 55% up to 94.5% of the copolymer being vinyl acetate, from 0.5-15% of the copolymer of monomers providing thermosetting characteristics and consisting essentially of an N-methylol derivative of an alpha,beta-monoethylenic carboxylic acid amide etherified with a C.sub.2 -C.sub.8 alcohol, the balance of said copolymer consisting essentially of from 5-40% of ethylene, the monomers of said copolymer being emulsified during copolymerization by from 0.05% to 10% of an hydroxy functional protective colloid selected from the group consisting of polyvinyl alcohol and hydroxy ethyl cellulose.
Dependencies are inferred from the claim text.