ABS compositions and process for preparing same

Details ABS compositions and process for preparing same ABS compositions and process for preparing same

1984-07-06

1985-12-17

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 73, 525 75, 525 76, 525 80, 525 84, 525 86, C08L 5502

Patent

active

045593868

ABSTRACT:
An intermediate for use in a polyblend consisting essentially of a copolymer of monoalkenyl aromatic monomer such as styrene and a ethylenically unsaturated nitrile monomer such as acrylonitrile surface grafted onto rubber which is dispersed in a matrix copolymer of the graft copolymer monomers, the dispersed phase being monomodal in particle size distribution and the weight percent of surface-grafted nitrile monomer being less by at least 2% than the weight percent nitrile monomer in the matrix. This intermediate with mismatched nitrile monomer can be blended with another rubber graft copolymer of different particle size dispersed in ungrafted matrix which contains matched nitrile monomer in the surface graft and matrix to provide a polyblend having properties at least equivalent to those obtained by blending two rubber graft copolymers of different particle size dispersed in a matrix which each contain matched nitrile monomer levels in the surface graft and matrix. The mismatched intermediate is prepared by continuous mass polymerization.

REFERENCES:
patent: 3509237 (1970-04-01), Aubrey
patent: 3576910 (1971-04-01), Jastrzebski
patent: 3627855 (1971-12-01), Schott et al.
patent: 3652721 (1972-03-01), Dalton et al.
patent: 3671607 (1972-06-01), Lee
patent: 3963807 (1976-06-01), Howe
patent: 4009227 (1977-02-01), Ott et al.
patent: 4419492 (1983-02-01), Simon
patent: 4430478 (1984-02-01), Schmitt et al.

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