C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
117/183, 400/307
C09D 3/48 (1980.01) C09D 3/80 (1980.01)
Patent
CA 1160785
ABSTRACT OF THE DISCLOSURE An aqueous dispersion lacquer composition of a binder in an aqueous medium; the binder is comprised of (1) a dispersed Polymer A of methyl methacrylate that can contain small amounts of adhesion promoting monomers such as diethyl amino ethyl methacrylate and other monomers that lower the glass transition temperature of the polymer such as butyl methacrylate or butyl acrylate; (2) a dispersant Polymer B of methyl methacrylate, optionally, styrene, an alkyl acrylate or an alkyl meth- acrylate and an ethylenically unsaturated carboxylic acid; and (3) a graft copolymer of the dispersed Polymer A and the dispersant Polymer B; and The composition contains sufficient base such as amine or ammonium hydroxide to provide a pH of about 7-9 and usually contains conventional plasticizers, pigments and other additives as are used in aqueous coating compositions. The composition may be used as an exterior finish for automobile and truck bodies.
361737
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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