Polymerisation of vinyl chloride monomer
AssigneeIneos Technologies (Vinyls) Limited
InventorsPaul A Ferguson, Jill Galligan, Raymond J Harvey
Life of this patent
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Abstract
A copolymer of (i) an alkyl acrylate or alkyl methacrylate and (ii) a hydroxyalkyl acrylate or hydroxyalkyl methacrylate is used as a secondary protective colloid in the suspension polymerization of vinyl chloride monomer. The alkyl group of the alkyl acrylate or alkyl methacrylate is preferably a 2-ethylhexyl group. The hydroxyalkyl group of the hydroxyalkyl acrylate or hydroxyalkyl methacrylate is preferably a hydroxyethyl group.
Claims10
A process for polymerizing vinyl chloride monomer, comprising subjecting vinyl chloride monomer to suspension polymerization in the presences of a copolymer of (i) an alkyl acrylate or alkyl methacrylate and (ii) a hydroxyalkyl acrylate or hydroxyalkyl methacrylate as a secondary type protective colloid, wherein the alkyl group of said alkyl acrylate or alkyl methacrylate is a C3 to C16 alkyl group, wherein said copolymer comprises from 20% to 50% by weight of alkyl acrylate or methacrylate moieties and from 80% to 50% by weight of hydroxyalkyl acrylate or methacrylate moieties and wherein said copolymer has a peak average molecular weight as determined by reversed phase liquid chromatography of from 5000 to 50000.
Dependencies are inferred from the claim text.