Process for producing a graft-copolymer and blends therewith

Details Process for producing a graft-copolymer and blends therewith Process for producing a graft-copolymer and blends therewith

1979-04-10

1981-09-01

Seccuro, Carman J.

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, 525261, 525262, C08L 5104

Patent

active

042873126

ABSTRACT:
A process for producing a graft-polymer comprises adding an aqueous solution of a salt of a strong acid and a monovalent strong base, which solution has been adjusted to a pH value of 8 to 13, to a rubber latex containing diene rubber particles and a fatty acid soap as an emulsifying agent to coagulate the above mentioned rubber particles, and thereafter adding a vinyl monomer to the latex containing the coagulated rubber particles to graft-polymerize the vinyl monomer.
According to this process, the formation of rubber masses and macroparticles during the coagulation is reduced and a rubber latex containing rubber particles having a narrow range of particle size distribution is obtained. When a graft-copolymer obtained by using the latex is blended with thermoplastic resins such as vinyl chloride resins, the impact resistance of the thermoplastic resins can be remarkably improved without impairing their transparency and gloss.

REFERENCES:
patent: 3886232 (1975-05-01), Tanaka et al.
patent: 3899547 (1975-08-01), Amagi et al.
patent: 3956424 (1976-05-01), Murayama et al.
patent: 4078018 (1978-03-01), Chauvel et al.
patent: 4173598 (1979-11-01), Castelazo et al.

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