Process for the copolymerization of acrylonitrile and sulphonate monomers
AssigneeRhone-Poulenc Inc.
InventorsHenri Menand, Andre Mison
Life of this patent
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Abstract
Acrylonitrile-unsaturated sulphonate copolymers are prepared with an increased sulphonate content relative to the sulphonate content in the monomer mixture, in an aqueous heterogeneous phase, by using an aqueous medium of an inorganic halide or nitrate of ammonia or of a metal of group IA or IIA of the Periodic Table.
Claims11
A process for the preparation of acrylonitrile unsaturated sulphonate copolymers containing at least 5% by weight of sulphonate units, which comprises polymerising a mixture of monomers consisting of (i) acrylonitrile and (ii) unsaturated sulphonate in an aqueous medium containing 5 to 30% by weight of an inorganic salt selected from halides and nitrates of ammonia or of a metal of Group IA or IIA of the Periodic Table (Handbook of Chemistry and Physics, 45th Edition, B-2).
A process for the preparation of acrylonitrile-unsaturated sulphonate copolymers containing at least 5% by weight of sulphonate units, which comprises polymerising a mixture of monomers consisting of (i) acrylonitrile, (ii) unsaturated sulphonate and (iii) vinyl esters, acrylic and methacrylic esters, vinylchloride or vinylidene chloride, in an aqueous medium containing 5 to 30% by weight of an inorganic salt selected from halides and nitrates of ammonia or of a metal of group IA or IIA of the Periodic Table (Handbook of Chemistry & Physics, 45th Edition, B-2).
A process for the preparation of acrylonitrile-unsaturated sulphonate copolymers containing at least 5% by weight of sulphonate units, which comprises polymerising a mixture of monomers consisting of (i) acrylonitrile, (ii) unsaturated sulphonate and (iii) vinyl acetate, methyl methacrylate, vinyl chloride or vinylidene chloride in an aqueous medium containing 5 to 30% by weight of an inorganic salt selected from halides and nitrates of ammonia or of a metal of group IA or IIA of the Periodic Table (Handbook of Chemistry and Physics, 45th Edition, B-2).
Dependencies are inferred from the claim text.