Method for the preparation of graft copolymers by emulsion copol

Details Method for the preparation of graft copolymers by emulsion copol Method for the preparation of graft copolymers by emulsion copol

1985-12-09

1987-10-27

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525250, 525261, 525262, 525316, 525942, C08F27904

Patent

active

047030909

ABSTRACT:
Graft copolymers are prepared by means of a two-step polymerization process, in emulsion: in the first step, a vinylaromatic monomer and an acryl or metacryl monomer are grafted on a monomodal polybutadiene latex constituted of particles of diameter comprised within the range of from 800 to 2500 .ANG.. The polymerization/grafting reaction is continued up to a 70-90% conversion, at which time a further portion of monomodal polybutadiene is added, together with further amounts of said monomers, always in emulsion.

REFERENCES:
patent: 3442979 (1969-06-01), Ott et al.
patent: 3509238 (1970-04-01), Aubrey et al.
patent: 3663656 (1972-05-01), Ford et al.
patent: 4221883 (1980-09-01), Mott et al.

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