Thermoplastically processible poly-vinylarene/polyurethane block copolymers
AssigneeBayer Aktiengesellschaft
InventorsJoachim Franke, Kurt P. Meurer, Peter Haas, Josef Witte
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Abstract
A substantially linear poly-vinylarene/polyurethane block copolymer prepared by reacting (1) a difunctional poly-vinylarene which is produced by anionic polymerization and which contains isocyanate-reactive groups, (2) a diisocyanate or an isocyanate prepolymer, and (3) a diol having a high molecular weight or a chain extender having a lower molecular weight, is disclosed to be suitable for the preparation of shaped articles, coatings, coupling agents and compatibilizers.
Claims5
A thermoplastically processible poly-vinylarene/polyurethane block copolymer comprising the reaction product of
- a) a poly-vinylarene having a weight average molecular weight of from 1,000 to 350,000 produced by anionic polymerization and containing one group capable of reacting with isocyanate groups, with
- b) a member selected from the group consisting of organic diisocyanates and corresponding isocyanate prepolymers, and at least one member selected from the group consisting of
- c) high molecular weight diols having a molecular weight of from 400 to 5000, and
- d) organic difunctional chain extending compounds having a molecular weight of from 32 to 399.
A process for the production of a poly-vinylarene/polyurethane block copolymer comprising reacting
- a) a poly-vinylarene having a weight average molecular weight of from 1,000 to 350,000 which has been obtained by anionic polymerization and contains one group capable of reacting with isocyanate groups, with
- b) at least one member selected from the group consisting of organic diisocyanates and corresponding isocyanate prepolymers and at least one member selected from the group consisting of
- c) high molecular weight diols having a molecular weight of 400 to 5000 and
- d) organic difunctional chain extending compounds having a
- molecular weight of from 32 to 399.
Dependencies are inferred from the claim text.