Preparation of finely divided polyolefin molding materials conta

Details Preparation of finely divided polyolefin molding materials conta Preparation of finely divided polyolefin molding materials conta

1979-12-28

1981-09-01

Seccuro, Carman J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 304

Patent

active

042871174

ABSTRACT:
A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of polyolefin and from 1 to 30 parts by weight of a conductive carbon black, with or without other additives, wherein the mixture of polyolefin powder and carbon black is compounded, in a first stage, until the crystallite melting point of the polyolefin is reached, and is then brought, in a second stage, to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point, after which the mixture is discharged from the mixer within from 0.5 to 30 seconds and is cooled within 120 seconds.

REFERENCES:
patent: 2316418 (1943-04-01), Habgood

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