Thermoplastic molding material

Details Thermoplastic molding material Thermoplastic molding material

1990-04-12

1992-04-14

Ziegler, Jacob

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 86, C08L 5104, C08L 5502

Patent

active

051049368

ABSTRACT:
Molding materials comprising a matrix of high impact polystyrene and rubber incorporated in the form of discrete particles contain not less than 50% by weight of polystyrene A and an effective amount of up to 50% by weight of a graft rubber B. The graft rubber B consists of from 40 to 95% by weight of an elastomeric core b.sub.1 and from 5 to 60% by weight of a shell b.sub.2, i.e. from 5 to 50% by weight of a first shell B.sub.21 of styrene and from 50 to 95% by weight of a second shell b.sub.22 of from 60 to 90% by weight of styrene and from 10 to 40% by weight of acrylonitrile, A and B, b.sub.1 and b.sub.2, b.sub.21 and b.sub.22 and styrene and acrylonitrile each summing to 100% by weight.

REFERENCES:
patent: 3509237 (1970-04-01), Aubrey
patent: 4214056 (1980-07-01), Lavengood
patent: 4330641 (1982-05-01), Echte et al.
patent: 4366289 (1982-12-01), Keskkula et al.
patent: 4634734 (1987-01-01), Hambrecht et al.
Polymer, vol. 28, Nov., (1987); "Methyl Methacrylate Grafted Rubbers as Impact Modifiers for Styrenic Polymers", Keskkula et al., pp. 2063-2069.
Polymer, vol. 28, Sep., (1987); "Synergistic Toughening in Rubber Modified Blends", Fowler et al., pp. 1703-1711.
ACS Symposium Polym. Mater. Sci. Eng., vol. 57, (1987), Keskkula et al., pp. 674-678.

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