Oxidation of polyethylene

Details Oxidation of polyethylene Oxidation of polyethylene

1988-06-15

1989-12-26

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...

5253338, C08F 806

Patent

active

048898970

ABSTRACT:
Oxidized polyethylenes useful as water-emulsifiable waxes and as lubricants in the extrusion of polyvinyl chloride are prepared by oxidizing finely divided polyethylene of high density at elevated temperatures with an oxidation gas of air and/or oxygen, the oxidation gas supplied per hour containing not less the 100 mg of ozone per kilogram of polyethylene, by performing the oxidiation in a paddle dryer and passing the oxidation gas into the free gas space above the polyethylene, the temperature in the paddly dryer preferably being continuously adjusted to from 1.degree. to 2.degree. C. below the softening point of the polyethylene.

REFERENCES:
patent: 3234197 (1966-02-01), Baum
patent: 3293112 (1966-12-01), Kehr
patent: 3322711 (1967-05-01), Bush et al.

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