Process for producing modified propylene polymer and modified pr

Details Process for producing modified propylene polymer and modified pr Process for producing modified propylene polymer and modified pr

1995-03-28

1996-12-31

Jagannathan, Vasu S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 64, 525 68, 525285, 525286, 525322, C08F25502, C08L 5106

Patent

active

055895417

ABSTRACT:
A process for producing a modified propylene polymer comprising the steps of premixing a propylene polymer with a vinyl monomer and polymerizing the vinyl monomer by kneading the premix at a temperature of a melting point thereof or higher is described, wherein the propylene polymer is a particulate propylene polymer having a specific surface area of 0.1 m.sup.2 /g or more. A modified propylene polymer composition is also described, obtained by mixing (a) a particulate propylene polymer having a specific surface area of 0.1 m.sup.2 /g or more, (b) 5% by weight or more of a vinyl monomer mainly comprising an aromatic vinyl monomer based on the total weight of the vinyl monomer and the propylene polymer, and (c) a radical polymerization initiator, substantially impregnating the vinyl monomer and the radical polymerization initiator into the propylene polymer, and then polymerizing the vinyl monomer by melt-kneading.

REFERENCES:
patent: 3375300 (1968-03-01), Ropp
patent: 4097554 (1978-06-01), Yui
patent: 5140074 (1992-08-01), DeNicola
patent: 5409991 (1995-04-01), Mitsuno

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