Oxidized polyethylene and use as lubricant for polyvinylchloride

Details Oxidized polyethylene and use as lubricant for polyvinylchloride Oxidized polyethylene and use as lubricant for polyvinylchloride

1990-11-06

1991-11-12

Henderson, Christopher

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

Synthetic resins

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

524567, 525239, 525387, 525388, C08F 806, C08L 2706, C08K 504

Patent

active

050649086

ABSTRACT:
Oxidized polyethylenes useful as lubricants in the extrusion of polyvinyl chloride are prepared by oxidation of finely divided polyethylene of high density at elevated temperatures with an oxidation gas of air and/or oxygen, the polyethylene used containing from 0.015 to 0.5% by weight of a free radical former organic compound in admixture and being contacted per hour with an oxidation gas which per kilogram of polyethylene contains from 30 to 600, in particular from 80 to 300, mg of ozone, with or without a reduced pressure treatment at elevated temperatures after the oxidation.

REFERENCES:
patent: 3234197 (1966-02-01), Baum
patent: 3293112 (1966-12-01), Kehr
patent: 3322711 (1967-05-01), Bush
patent: 4459388 (1984-07-01), Hettche
Chem. Abst. 89, 75883m (1978).
Chemical Abstract 89:75,883m, vol. 89, p. 28 (1978).

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