Process for grafting vinyl monomers on particulate olefin...

Details Process for grafting vinyl monomers on particulate olefin... Process for grafting vinyl monomers on particulate olefin...

C - Chemistry, Metallurgy

08

F

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

Patent

CA 2071650

This invention provides a uniformly grafted particulate polyolefin material formed by the free radical-initiated grafting of at least one non-homopolymerizing vinyl monomer at free radical sites on a particulate olefin polymer material having (a) a pore volume fraction of at least about 0.07 wherein more than 40% of the pores have a diameter larger than 1 micron; and (b) a weight average diameter in the range of about 0.9 to 7 mm. The amount of vinyl monomer grafted to the as-polymerized particulate olefin polymer material is about 0.1 to 10%, preferably about 0.3 to 5.0%, of the total weight of the grafted olefin polymer product, and the grafted vinyl monomer is uniformly distributed throughout the particles of the olefin polymer material.

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