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摘要

1,159,812. Electrolytic polymer coating compositions. BADISCHE ANILIN- & SODAFABRIK A.G. 8 July, 1966 [9 July, 1965], No. 30710/66. Heading C3P. [Also in Division C7] A solution of a copolymer for cathodic deposition on a conducting substrate comprises on a weight basis a copolymer prepared by solution polymerization of 10 parts N-1-(N1:N1- dimethylamino)-propyl-(3)-amide of acrylic acid, 20 parts N-2-oxa-4-methylpentylamide of methacrylic acid, 20 parts methyl methacrylate, and 50 parts tert-butyl acrylate in 100 parts of a 1: 1 mixture of n-butanol and p-xylene, diluted with water to a solids content of 8 % and adjusted to pH 6 with acetic acid. Another composition suitable for cathodic deposition comprises a copolymer prepared by solution polymerization of 10 parts N-1-(N1:N1- dimethylamino)-propyl-(3)-amide of acrylic acid, 5 parts acrylamide, 40 parts n-butyl acrylate, 35 parts tert-butyl acrylate, and 10 parts 4- hydroxybutyl acrylate in 100 parts of a 1: 1 mixture of n-butanol and p-xylene to which copolymer is added 0À5 mole acetic acid per mole of the substituted acrylic acid amide, the resultant salt being admixed in a solids ratio of 90: 10 with a water-soluble melamine-formaldehyde resin partly etherified with methanol and the mixture being diluted with water, 13 parts TiO 2 pigment added and the resultant mix homogenized by ball-milling, followed by dilution with water to 8% solids content. A further suitable copolymer salt is produced from maleic acid and a copolymer prepared by copolymerization of 3 parts N- aminoethyl acrylamide, 8 parts N: N-di-(N1:N1-diethylamino)ethylamide of acrylic acid, 3 parts N- ethyl methacrylamide. 4 parts N-methylol methacrylamide, 35 parts styrene, 30 parts n-butyl acrylate, 10 parts tert-butyl acrylate, 5 parts acrylonitrile, and 3 parts N-vinylimidazole.