Method for improving characteristics of polymethylpentene throug

Details Method for improving characteristics of polymethylpentene throug Method for improving characteristics of polymethylpentene throug

1979-09-24

1982-05-04

Cannon, James C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

106291, 106308F, 428363, 524449, 524472, 524579, B32B 1902, C08K 904

Patent

active

043281460

ABSTRACT:
A method for reducing heat distortion but retaining high dielectric properties and volume resistivity of polymethylpentene. The method comprises dry blending chlorinated paraffin wax on mica particles and mixing so as to coat the mica particles and thereafter mixing with polymethylpentene in a blender so as not to break the mica particles or strip the wax coating therefrom. The resulting compound is then fed into an extruder at temperatures of about 325.degree. F. to 475.degree. F. The resulting material is then pelletized or strand cut.

REFERENCES:
patent: 2954552 (1960-09-01), Halpern
patent: 3655565 (1972-04-01), McDonald
patent: 3951680 (1976-04-01), Robertson
patent: 4066604 (1978-01-01), Wong
patent: 4173492 (1979-01-01), Pollard
Chem. Abstracts 94 209,498, Abstract of Japanese Pat. No. 81-30412.

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