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US 6,143,824 AGranted
Polymeric compositions
AssigneeEnichem S.p.A.
InventorsNicoletta Cardi, Riccardo Po', Aldo Longo, Andrea Callaioli
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Abstract
Polymeric compositions comprising: a) at least one aromatic thermoplastic polymer or a vinylaromatic thermoplastic (co)polymer; b) at least one thermoplastic resin selected from a (co)polymer optionally modified with rubber, comprising a vinylaromatic monomer and/or a monomer deriving from (meth)acrylic acid and thermoplastic polyesters; c) a compatibilizing block polymer, with at least two blocks, which can be obtained by means of a living radicalic polymerization process.
Claims8
Polymeric compositions comprising:
- a) at least one thermoplastic polymer selected from polystyrene, high impact polystyrene and polyphenylenether;
- b) at least one thermoplastic resin selected from styrene/acrylonitrile copolymers, acrylonitrile/butadiene/styrene copolymers, acrylonitrile/ethylene-propylene-diene/styrene copolymers and polycarbonate;
- c) a compatibilizing block polymer, with at least two blocks, obtained with a living radicalic polymerization process which comprises:
- i) polymerizing at least one vinylaromatic monomer, in the presence of a living radical initiating system, to a conversion of from 5 to 99%;
- ii) feeding acrylonitrile to the polymerization mixture obtained in i) in such a quantity as to have the molecular weight of the block copolymer lower than 1,000,000, at the end of the polymerization process;
- iii) optionally repeating, once or twice, step (i), or steps (i)+(ii) or (i)+(ii)+(i);
- iv) recovering the block polymer thus obtained.
4 more elements
Dependencies are inferred from the claim text.