Dispersion of antioxidant in cross-linkable polyethylene

Details Dispersion of antioxidant in cross-linkable polyethylene Dispersion of antioxidant in cross-linkable polyethylene

1976-08-23

1978-07-18

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

174110PM, 260 457R, 260 459R, 260 4595R, 260 4585B, 264340, 427212, C08K 324

Patent

active

041015126

ABSTRACT:
This invention is an improved method for dispersing antioxidant material in cross-linkable insulation for electric cables. The antioxidant, which has a high melting point, is dissolved in a carrier, preferably the cross-linking agent, to obtain a solution of low melting point that is dispersed through the pellets of insulation when the ingredients are mixed in a blender. Improvements in the blender cycle reduce the content of fines, improve dispersion of the antioxidant and shorten the blending cycle. The preferred ingredients used are 4,4'-thiobis (6 tert-butyl-m-cresol) as the antioxidant and dicumyl peroxide as the cross-linking agent.

REFERENCES:
patent: 2528523 (1950-11-01), Kent
patent: 2826570 (1958-03-01), Ivett
patent: 3432459 (1969-03-01), Listner
patent: 3432462 (1969-03-01), Gignilliat et al.
patent: 3455752 (1969-07-01), Gray et al.
Wire and Wire Products, Jul. 1965, pp. 976-980, and 1021.
Wire and Wire Products, May 1963, pp. 670, 675-678, 724 and 725.
Wire and Wire Products, Apr. 1961, pp. 465-468, 516, 517 and 518.

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