Patent GB-964322-A (GB)
Title: Polymeric compositions from vinyl and/or vinylidene halides,methods of making such compositions and articles coated therewith
IPC: C08L27/02
Filed: 1960-08-08
Abstract: Compositions comprising a polymer of at least a major proportion of at least one monomeric vinyl or vinylidene halide and containing 0.01 to 4% by weight based on the polymer of a polymeric colloid which is substantially soluble in water and many organic solvents and which is a copolymer of at least one lower alkenyl substituted lactam having 4 to 7 carbon atoms in the lactam ring and vinyl acetate, are prepared by polymerizing said monomer in the presence of the colloid. Polymerization may be effected in aqueous suspension or emulsion, in solution or in bulk.  Specified halides are vinyl and vinylidene chloride, bromide and fluoride.  Specified comonomers are vinyl acetate, allyl alcohol, 3-butene-1-ol, diallyl phthalate, diallyl malonate, diallyl malate, allyl acetone, divinyl ether, diallyl ether, phenyl vinyl ether, acrylonitrile, methacrylonitrile, chloracrylonitrile and trichlorofluoroethylene Polymerization may be effected in the presence of catalysts, e.g. benzoyl peroxide and lauroyl peroxide, and buffers and chain transfer agents, e.g. sodium bicarhonate, lead stearate, calcium stearate and trichlorethylene; and may be short-stopped by adding diisopropyl benzene hydroperoxide, tertiary butyl hydroperoxide and dimazine. The colloid may be a copolymer of vinyl acetate with 1-vinyl-2-pyrrolidone, 1-allyl-2-pyrrolidone, 1-vinyl-3-pyrrolidone, 1-vinyl-3-methyl-2-pyrrolidone, 1-vinyl-3-propyl-2-pyrrolidone, 5-vinyl-2-pyrrolidone, 3-allyl-2-pyrrolidone, 1-vinyl-2-piperidone, 1-vinyl-3-piperidone, 1-vinyl-3-methyl-5-ethyl-piperidone 6-vinyl-3-methyl-2-piperidone, 1-propyl-3-vinyl-2-piperidone, 1 butenyl-3-piperidone, 1 vinyl-2-suberone-isoxine, 1-allyl-2-suberone isoxime and 1-amyl-2-vinyl-3-suberone isoxime.  The polymers may be compounded with conventional ingredients, e.g. dioctyl phthalate, tricesyl phosphate, polyester plasticizers, stabilizers, antioxidants, fillers, rubbers, resins, pigments, dyes, fillers and fungicides, and may be made into films and sheets, floor tiles and records or dissolved in organic solvents to give coating compositions. Examples describe the suspension polymerization of mixtures of vinyl chloride and vinyl acetate in the presence of lauroyl peroxide, trichlorethylene and (I-III) copolymers of vinyl acetate and 1-vinyl-2-pyrrolidone and (IV) copolymers of vinyl acetate and 1-vinyl-3-pyrrolidone, 1-vinyl-3-methyl-2-pyrrolidone, 1-vinyl-3-methyl-2-piperidone, 1-methyl-2-allyl-3-piperidone and 1-vinyl-2-suberone isoxime; and the solution of the products in methyl ethyl ketone-toluene mixtures; and the suspension polymerization of vinyl chloride in the presence of lauroyl peroxide and a copolymer of vinyl aectate and 1-vinyl-2-pyrrolidone.ALSO:Metal articles may be coated with compositions comprising a polymer of at least a major proportion of at least one vinyl or vinylidene halide and containing 0,01-4,0% by weight based on the polymer of a polymeric colloid which is substantially soluble in water and many organic solvents and which is a copolymer of at least one lower alkenyl substituted lactam having 4-7 carbon atoms in the lactam ring and vinyl acetate, the polymerization of the halide having been effected in the presence of the polymeric colloid.  Specified halides are vinyl and vinylidene chloride, bromide and fluoride.  Specified comonomers are vinyl acetate, allyl alcohol, 3-butene-1-ol, diallyl phthalate, diallyl malate, diallyl malonate, allyl acetone, divinyl ether, diallyl ether, phenyl vinyl ether, acrylonitrile, methacrylonitrile, chloracrylonitrile and trichlorofluoroethylene. The colloid may be a copolymer of vinyl acetate and 1-vinyl-2-pyrrolidone, 1-allyl-2-pyrrolidone, 1-vinyl-3-pyrrolidone, 1-vinyl-3-methyl-2-pyrrolidone, 1-vinyl-3-propyl-2-pyrrolidone, 5-vinyl-2-pyrrolidone, 3-allyl-2-pyrrolidone, 1-vinyl-2-piperidone, 1-vinyl-3-piperidone, 1-vinyl-3-methyl-5-ethyl piperidone, 6-vinyl-3-methyl-2-piperidone, 1-propyl-3-vinyl-2-piperidone, 1-butenyl-3-piperidone, 1-vinyl-2-suberone isoxime, 1-allyl-2-suberone isoxime or 1-amyl-2-vinyl-3-suberone isoxime. The compositions may be dissolved in solvents, e.g. methyl ethyl ketone-toluene mixtures, and applied by spraying or dipping.  The coating of phenolic resin coated tin plate beer cans with methyl ethyl ketone-toluene solutions of the compositions is described, and in Example I the coating of grease-free tin plates with compositions comprising vinyl chloride-vinyl acetate copolymers and vinyl acetate-1-vinyl-2-pyrrolidone copolymers, and the coatings compared with those obtained (Example V) when the 1-vinyl-2-pyrrolidone copolymer is replaced by a homopolymer of 1-vinyl-2-pyrrolidone.