Bayer Aktiengesellschaft

Ernst Knust

Karlfried Wedemeyer

Alfons Klein

Rudolf Kron

Lothar Havenith

A dielectric composition comprising a mixture of monoisopropylated diphenyls and polyisopropylated diphenyls, especially a mixture of 30 to 60 parts by weight of monoisopropylated diphenyls and 70 to 40 parts by weight of polyisopropylated diphenyls, the polyisopropylated diphenyls preferably being made up in turn of 60 to 85 parts by weight of diisopropylated diphenyls, 10 to 35 parts by weight of triisopropylated diphenyls and 0.5 to 5 parts by weight of tetraisopropylated diphenyls, these latter amounts being based upon the total amount of the polyisopropylated diphenyls.

Impregnating agent and its use

An improvement in an electrical device containing a functional liquid wherein the functional liquid is a compound of the formula ##STR1## and the use of such compounds as dielectrics.

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Leverkusen, Germany

Ernst Knust