| 摘要 |
1328010 Aminoplast/addition copolymer compositions FORD MOTOR CO Ltd 22 Nov 1971 [1 March 1971] 54198/71 Headings C3G C3P and C3R A non-aqueous dispersion of a thermosetting film-forming polymer is obtained by copolymerizing at least one ethylenically unsaturated monomer containing an epoxy, hydroxy, cyanato or carboxylic acid group with at least one ethylenically unsaturated monomer lacking such a group in the presence of a copolymer of at least two ethylenically unsaturated monomers, all of which contain at least 4 carbon atoms and at least one contains at least 11 carbon atoms, and at least one of which contains an epoxy, hydroxy, cyanato or carboxylic acid group, in a medium which is non-solvent for the copolymer formed, and blending an aminoplast resin with the resultant dispersion. In the examples a first copolymer is prepared in butanol from 2 - ethylhexyl acrylate and hydroxypropyl methacrylate, plus, in Examples 2 and 4, butyl methacrylate, styrene, and acrylic acid; to the product solution is added an aliphatic naphtha and styrene, butyl and methyl methncrylates and acrylic acid, plus, in Examples 3 and 4, acrylonitrile and hydroxypropyl methacrylate; the catalyst used is butyl peroctoate in all cases; to the product dispersions is added an alkylated melamine-formaldehyde resin in xylene/butanol plus a mixed aliphatic/aromatic hydrocarbon solvent to give a lacquer. |
