Dispersion of antioxidant in cross-linkable polyethylene

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

C - Chemistry, Metallurgy

08

J

18/1211, 400/710

C08J 3/22 (2006.01) C08L 23/06 (2006.01) H01B 3/30 (2006.01) H01B 3/44 (2006.01)

Patent

CA 1077646

ABSTRACT OF THE DISCLOSURE 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.

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