Kureha Kagaku Kogyo Kabushiki Kaisha

Shichiro Kawada

Akira Ito

Masaaki Takahashi

Yuriko Igarashi

Jiro Ogura

Ryoichi Ito

Ethylene copolymer compositions having excellent dielectric properties comprising an alkylfluoranthene having the following formula: ##SPC1## (wherein R represents an alkyl group containing from 1 to 4 carbon atoms, and x is an integer of from 1 to 4, and when x is an integer of 2 or greater, R may be different or the same) in an amount of at least 0.5 parts by weight per 100 parts by weight of an ethylene copolymer.

Dielectric ethylene copolymer compositions containing alkylfluoranthene

Polyolefin compositions having excellent dielectric properties comprising an alkylpyrene having the following formula ##SPC1## (wherein R represents an alkyl group containing from 1 to 4 carbon atoms, and x is an integer of from 1 to 4, and when x is an integer of 2 or greater, R may be different or the same) in an amount of at last 0.5 parts by weight per 100 parts by weight of a polyolefin.

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Hitachi, Japan

Shichiro Kawada