Manufacture of high impact and translucent styrene polymers

Details Manufacture of high impact and translucent styrene polymers Manufacture of high impact and translucent styrene polymers

1979-11-27

1981-08-04

Michl, Paul R.

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

Synthetic resins

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

525243, C08F27902

Patent

active

042823340

ABSTRACT:
A process for the manufacture of high impact and translucent polystyrene, in which, in a first stage, styrene is prepolymerized in mass or in solution in the presence of a rubber, and the polymerization is then completed in mass, in solution or in aqueous suspension. The prepolymerization is taken to a stage where the amount of styrene converted is from 3 to 10 times the amount of the elastomer constituent of the rubber, and at this conversion the disperse soft-component phase formed should have a mean particle size of less than 1 .mu.m and should contain from 35 to 65% by weight of free or chemically bonded polystyrene segments. The translucent styrene polymers of high impact strength may be used for packaging purposes.

REFERENCES:
patent: 3660535 (1972-05-01), Finch
patent: 3883616 (1972-05-01), Hozumi

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