Method of producing olefin polymer graft copolymers

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

C - Chemistry, Metallurgy

08

F

400/2024

C08F 255/00 (2006.01) C08F 279/02 (2006.01)

Patent

CA 2033671

Disclosed is a method of making graft copolymers of olefin polymers by contacting a particulate olefin polymer with a free radical polymerization initiator, e.g., a peroxide, and a vinyl monomer at about from 60° to 125° 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 all.

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