Method for the manufacture of graft copolymers

Details Method for the manufacture of graft copolymers Method for the manufacture of graft copolymers

1978-06-21

1980-01-29

Hamrock, William 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 86, C08F27902, C08F27904

Patent

active

041861558

ABSTRACT:
The present invention relates to the method for the manufacture of graft copolymers by the polymerization of a monomeric mixture comprising at least one aromatic vinyl derivative monomer and at least one acrylic or methacrylic derivative monomer in the presence of a graftable monodimensional elastomer latex, comprising the steps of first carrying out the polymerization under aqueous emulsion polymerization conditions in the presence of an initial amount of a first monodimensional elastomer latex being the major portion of the latex entering into the composition of the graft copolymer until the xy/z ratio is greater than 30%; x being the total parts by weight of said monomers, y the conversion coefficient of said monomers expressed in percent of total amount, and z the total amount of elastomer expressed in parts by weight of dry solids, and thereafter adding the remaining amount of a second monodimensional elastomer latex and completing the polymerization reaction under suspension polymerization conditions.

REFERENCES:
patent: 3370105 (1968-02-01), DeBell
patent: 3436440 (1969-04-01), Abe et al.
patent: 3887652 (1975-06-01), Carrock et al.
patent: 4011283 (1977-03-01), Sturt

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