Process for the continuous preparation of rubber-modified polyme

Details Process for the continuous preparation of rubber-modified polyme Process for the continuous preparation of rubber-modified polyme

1981-06-15

1984-01-24

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...

525261, C08F27902

Patent

active

044278268

ABSTRACT:
A process, carried out without a diluent or in solution, in more than 2 reaction zones, for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a monomeric aromatic vinyl compound and an elastomeric polymer, in an amount of from 3 to 16% by weight based on the monomer, are polymerized, in the absence of a free radical initiator, but in the presence of a mercaptan as a chain transfer agent, at from 80.degree. to 180.degree. C. in a first reaction zone, with stirring, up to a maximum monomer conversion, U.sub.max, given by the equation

REFERENCES:
patent: 3243481 (1966-03-01), Ruffing et al.
patent: 3428712 (1969-02-01), Carrock et al.
patent: 3903204 (1975-09-01), Carter et al.
patent: 3914339 (1975-10-01), Shima et al.
patent: 4098847 (1978-07-01), Stevenson
patent: 4282334 (1981-08-01), Walter

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