Process for the polymerization of ethylenically unsaturated organic compounds
AssigneeSocieta' Italiana Resine S.I.R. S.p.A.
InventorsSilvio Vargiu, Volfango Gualandi, Beppino Passalenti
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Abstract
Vinylidene chloride polymers and copolymers are prepared by contacting vinylidene chloride monomer alone or in mixture with other ethylenically unsaturated monomers with a catalytic system consisting of an organic per-compound, an organic compound of zirconium or cobalt and an acid compound according to the definition of Bronsted and Lowry in an organic solvent medium. High yields and polymerization speeds are achieved at low polymerization temperatures (10.degree.-35.degree. C).
Claims26
A method for the solution polymerization by addition of vinylidene chloride monomer or a mixture of the latter with one or more other ethylenically unsaturated monomers, which comprises contacting said monomer or mixture of monomers with a catalytic system consisting of an organic per-compound, an organic compound of zirconium and para-toluene acid sulfonic, in an organic solvent medium in which the monomers, the catalytic system and the polymer or copolymer being formed are soluble.
A method for the solution polymerization by addition of vinylidene chloride monomer or a mixture of the latter with one or more other ethylenically unsaturated monomers, which comprises contacting said monomer or mixture of monomers with a catalytic system consisting of an organic per-compound, an organic compound of cobalt and para-toluene sulfonic acid, in an organic solvent medium in which the monomers, the catalytic system and the polymer or copolymer being formed are soluble.
Dependencies are inferred from the claim text.