Polyphenylene ether/rubber modified polystyrene composition suit

Details Polyphenylene ether/rubber modified polystyrene composition suit Polyphenylene ether/rubber modified polystyrene composition suit

1988-06-23

1990-02-13

Epstein, Henry F.

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

Synthetic resins

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

525 92, 525101, 525132, 525133, 525151, 525152, C08L 5104

Patent

active

049007866

ABSTRACT:
Polyphenylene ether/rubber modified polystyrene compositions are uniquely suitable for flow molding large, e.g., 10 pounds or more, parts when the rubber modified polystyrene contains at least 12 percent by weight of particulate rubber, the rubber particles have an average diameter of greater than about 3 microns, and the compositions have an R* value of greater than about 16. R* is the ratio of the low shear rate viscosity to the high shear rate viscosity at the optimum processing temperature.

REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3306875 (1967-02-01), Hay
patent: 3383435 (1968-05-01), Cizek
patent: 4128602 (1978-12-01), Katchman et al.
patent: 4128603 (1978-12-01), Katchman et al.
patent: 4128604 (1978-12-01), Katchman et al.

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