| 摘要 |
1,206,398. Dispersing polymers in organic liquids. IMPERIAL CHEMICAL INDUSTRIES Ltd. 6 Nov., 1967 [14 Nov., 1966], No. 50915/66. Headings C3B, C3G and C3P. Dispersions of particles of polymer in an organic liquid which is a non-solvent for the polymer, which dispersions have improved flow characteristics, are prepared by dispersing pre-formed particles of the polymer in the liquid in the presence of a polymeric stabilizer comprising in its molecule one component which is solvated by the organic liquid and another component of different polarity which is relatively non-solvated by the liquid and becomes associated with the polymer particles, thereby attaching to the particles a sterically stabilizing sheath of the solvated component of the stabilizer, the associated component of the stabilizer being, under the conditions in which the dispersion is made, a plastic solid or viscous liquid. Exemplified stabilizers are the products obtained by copolymerizing a condensation product of poly(12 - hydroxystearic acid) and glycidyl methacrylate with (a) methyl methacrylate and methacrylic acid, (b) methyl methacrylate, (c) methyl methacrylate and ethyl acrylate, (d) methyl methacrylate, ethyl acrylate and methacrylic acid, (e) styrene, (f) ethyl acrylate, (g) methyl methacrylate and acrylonitrile, (h) (3-ethoxyethyl methacrylate, and (i) methyl methacrylate and lauryl methacrylate; the product obtained by reacting poly(12 - hydroxystearic acid) with an epichlorhydrin - diphenylolpropane condensate; and the product obtained by reacting a lauryl methacrylate-glycidyl methacrylate copolymer with methacrylic acid and copolymerizing the reaction product with ethyl acrylate and methyl methacrylate. These stabilizers are used to disperse the following polymers in hydrocarbon or mixed hydrocarbon solvents, ethyl acetate-xylene, and butyl acetate - aliphatic hydrocarbon solvent:- polyvinyl chloride, vinyl acetate-vinyl chloride copolymer, polystyrene, polymethyl methacrylate, polyvinylidene fluoride, polychloroprene. In some cases, a dialkyl phthalate plasticizer is included in the preparation of the dispersion. |
