Impact-resistant graft copolymer and thermoplastic resin composi

Details Impact-resistant graft copolymer and thermoplastic resin composi Impact-resistant graft copolymer and thermoplastic resin composi

1991-11-21

1993-03-02

Welsh, Maurice J.

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

Synthetic resins

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

525 64, 525 67, 525 80, 525 84, 525242, 525310, C08L 900

Patent

active

051910187

ABSTRACT:
A graft copolymer is formed by graft-polymerizing 10-95 wt. parts of a vinyl monomer onto 5-90 wt. parts of the rubber polymer which comprises 40-99 wt. % of butadiene and 1-60 wt. % of an aromatic polycyclic vinyl monomer represented by the following formula (I) or (II): ##STR1## wherein R denotes a hydrogen atom or a methyl group. The graft copolymer is characterized by the rubber polymer having a high refractive index as well as a low glass transition temperature due to the use of the aromatic polycyclic vinyl monomer. Accordingly, the graft copolymer per se may be used as a thermoplastic resin having good transparency and impact resistance at a low rubber polymer content and may also be added to a transparent thermoplastic resin inclusive of a vinyl chloride resin and a styrene-acrylonitrile copolymer resin to provide the thermoplastic resin with an improved impact resistance while retaining a good transparency.

REFERENCES:
patent: 3953542 (1976-04-01), Halasa et al.
patent: 4767833 (1988-08-01), Yumoto et al.

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