Method of producing olefin polymer graft copolymers

Details Method of producing olefin polymer graft copolymers Method of producing olefin polymer graft copolymers

1990-12-10

1992-08-18

Seccuro, Jr., 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...

525279, 525282, 525283, 525285, 525296, 525302, 525303, 525301, 525309, 525313, 525319, 525324, 525904, C08F25502, C08F25504, C08F25510

Patent

active

051400740

ABSTRACT:
Disclosed is a method of making graft copolymers of olefin polymers by contacting a particulate olefin polymer with a free radical polymeriztion initiator, e.g., a peroxide, and a vinyl monomer at about from 60.degree. to 125.degree. C., while controlling the monomer addition rate so that it does not exceed about 4.5 pph/min, and most preferably does not exceed about 3.0 pph/min, at any monomer feed level. To prevent polymer degradation, a non-oxidizing environment is maintained throughout the process, and residual free radicals are deactivated, and unreacted initiator is decomposed, before the graft copolymer is exposed to air.

REFERENCES:
patent: 3177269 (1965-04-01), Nowak et al.
patent: 3177270 (1965-04-01), Jones et al.
patent: 3240843 (1966-03-01), Nelson et al.
patent: 3886233 (1975-05-01), Visseren
patent: 4278777 (1981-07-01), Jakabhazy et al.
patent: 4595726 (1986-06-01), Klosiewicz
patent: 4661549 (1987-04-01), Walker

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