Graft copolymer preparation

Details Graft copolymer preparation Graft copolymer preparation

1976-02-12

1977-07-05

Hamrock, William F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F27904

Patent

active

040340201

ABSTRACT:
The invention relates to a continuous flow process for the preparation of graft copolymers, for example ABS, wherein a mixture of a polybutadiene and/or styrenebutadiene copolymer latex, one or more vinyl aromatic monomers and one or more unsaturated nitrile monomers is continuously supplied to a first stage, graft polymerization is initiated in said first stage, the mixture is continuously removed from the said first stage and supplied to at least a second stage wherein graft polymerization is continued, the temperature in each stage being 50.degree. to 100.degree. C, the conversion of monomers to polymer in the first stage not exceeding 65% by weight, and the overall conversion being at least 80% by weight.

REFERENCES:
patent: 2512697 (1950-06-01), Grotenhuis
patent: 3243481 (1966-03-01), Ruffing et al.
patent: 3475514 (1969-10-01), Nemphos
patent: 3542905 (1970-11-01), Nishioka et al.
patent: 3632683 (1972-01-01), Cusano
Kremers et al., "Elements of Chemical Reactor Design and Operation", pp. 62-68, Academic Press, N.Y., 1963.

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