GB1335049A - Linear polyester method for its production and products obtainable therefrom - Google Patents

Abstract

1335049 Polyesters J D McCALL (Velsicol Chemical Corp) 7 Nov 1970 53055/70 Headings C3P and C3R A linear polyester is produced by reacting together (A) 10-40 mole per cent of cis-3- methyl - 4 - cyclohexene - cis,cis - 1,2 - dicarboxylic anhydride of melting point 63-65‹ C., (B) 10-40 mole per cent of maleic or fumaric acid or maleic anhydride and (C) 50-70 mole per cent of a glycol, e.g., ethylene glycol, di-, tri-, tetra- and higher ethylene glycols, 1,2-propylene glycol, trimethylene glycol, polypropylene glycol, dipropylene glycol and 2,2-dimethyl-1,3- propane diol. From 1 to 60 mole per cent of compound B may be replaced by an equivalent amount of an ester-forming derivative of an aliphatic, cycloaliphatic or aromatic dicarboxylic acid or anhydride, e.g., chlorendic, phthalic, carbic, hydrogenated carbic, succinic, adipic and tetrachloro- or -bromo benzene dicarboxylic acids, the halogenated dicarboxylic acids being used if fire retardant polymers are required. Coating compositions, e.g. for wood, metal, paper, plastics, pressed wood products and concrete blocks, may comprise 40-80% by weight of the polyester and 20-60% by weight of a monomeric ethylene derivative copolymerizable by free radical addition polymerization with the unsaturation in the polyester, e.g., styrene, vinyl toluene, chlorostyrene, vinyl acetate, propionate or benzoate, methyl or ethyl acrylate, methyl methacrylate, N - (1,1 - dimethyl - 3 - oxobutyl)-acrylamide, vinyl methyl ketone, divinyl sulphone, succinic acid, divinyl ester, N- vinyl pyrrolidone, N-vinyl caprolactam, isobutyl vinyl ether and butane diol-1,4-divinyl ether. The composition may also contain 0À005-0À1% by weight of a polymerization inhibiter, e.g., hydroquinone, benzoquinone, resorcinol or pyrocatechol, 0À2-3% by weight of a polymerization initiator, e.g., methyl ethyl ketone peroxide, cyclohexanone peroxide, cumene hydroperoxide, tertiary-butyl hydroperoxide, benzoyl peroxide, lauryl peroxide, tertiary-butyl perbenzoate or permaleate or ditertiary-butyl peroxide, azobisisobutyronitrile or azo-bis-isobutyric acid dibutyl ester and 0À01-1% by weight of a drier, e.g., iron, cobalt, nickel, manganese, chromium, lead, vanadium, zinc, zirconium, cerium, aluminium or calcium naphthenate. In examples polyesters prepared from cis - 3 - methyl - 4 - cyclohexane - cis, cis- 1,2-dicarboxylic anhydride, fumaric acid or maleic anhydride and diethylene glycol, the monoallyl ether of trimethylol propane, propylene glycol, neopentyl glycol or 1,3-butylene glycol, optionally together with the three stereo isomers of cis-3-methyl-4-cyclohexene-cis, cis- 1,2-dicarboxylic anhydride, chlorendic acid, phthalic anhydride, isophthalic acid or adipic acid, are dissolved in styrene, vinyl benzoate or o-chlorostyrene.