Polymer Emulsions suitable as Adhesives and for Coating

摘要

1,172,151. Coatings. E.I. DU PONT DE NEMOURS & CO. 5 Jan., 1967 [7 Jan., 1966], No. 755/67. Headings B2E and B2K. [Also in Divisions B5, C3 and D1] Compositions suitable for coating and adhesive applications comprise a mixture of (1) an aqueous emulsion of an addition polymer having attached to the main carbon chain thereof monovalent radicals of the formula: wherein Z is a tetravalent aliphatic hydrocarbon radical of 2-3 carbon atoms, R is H or C 1 -C 8 alkyl, R1 is H, OH or C 1 -C 8 alkyl and R2 is H or a C 1 -C 8 non-tertiary alkyl radical which may optionally be omega-hydroxy substituted, the addition polymer having an amino N content of 0.1-8% by weight, and (2) an aqueous emulsion of an addition polymer containing epoxy groups and having an epoxide equivalent of between 322.98 x 10-5 and 322.98 x 10-3 grams epoxide per gram of polymer; the polymers of (1) and (2) being present in a weight ratio of 1:99 to 99:1. The polymer of emulsion (1) is preferably a (meth) acrylate ester polymer containing carboxylic acid groups iminated with an appropriate alkyleneimine. The polymer of emulsion (2) is preferably a copolymer of a (meth)acrylate with an epoxy group-containing monomer (e.g. an ester, ether, thioether or olefin epoxide). The compositions may also include water-soluble solvents, basic zinc chromate, and polyacid dispersant, titanium dioxide and printing ink formulations. In Examples (32, 33 and 38), the compositions are applied by brushing to a cold rolled steel surface and to weatherexposed panels, and are reverse-printed onto polyvinyl fluoride film.