Insulating and anticorrosive composition for electrical devices

Two semifluid mixtures for forming a solid electrical insulating body by mixing of the mixtures, characterized in that one of said mixtures comprises:

• from 20 to 35 parts (w/w) of a bitumen having a softening point of at least 90.degree. C.,
• from 1.5 to 7 parts (w/w) of a hydrocarbon resin,
• from 0.5 to 5 parts (w/w) of an alkylbenzene,
• from 35 to 60 parts (w/w) of a resin oil comprising a mixture of rosin acids and esters, and
• from 10 to 30 parts (w/w) of olein,
• the other of said mixtures comprising:
• from 40 to 60 parts (w/w) of a mixture of partially hydrogenated terphenyls and quaterphenyls,
• from 0.5 to 5 parts (w/w) of a styrene/butadiene block copolymer,
• from 5 to 30 parts (w/w) calcium oxide, and
• from 10 to 30 parts (w/w) of calcium hydroxide.

An electrically conductive element electrically insulated by a solid body consisting essentially of a mixture of two components characterized in that:

• A) the first component comprises
• from 20 to 35 parts (w/w) of a bitumen having a softening point of at least 90.degree. C.,
• from 1.5 to 7 parts (w/w) of a hydrocarbon resin,
• from 0.5 to 5 parts (w/w) of an alkylbenzene,
• from 35 to 60 parts (w/w) of a resin oil comprising a mixture of rosin acids and esters, and
• from 10 to 30 parts (w/w) of olein,
• B) the second component comprises
• from 40 to 60 parts (w/w) of a mixture of partially hydrogenated terphenyls and quaterphenyls,
• from 0.5 to 5 parts (w/w) of a styrene/butadiene block copolymer,
• from 5 to 30 parts (w/w) calcium oxide, and
• from 10 to 30 parts (w/w) of calcium hydroxide,
• C) and the mixture has 1 part (w/w) of the first component (a) mixed with 0.1-0.3 parts (w/w) of the second component (B).

A method of making a solid electrical insulating body consisting essentially of two components, said method comprising mixing together one part (w/w) of a first semifluid component with 0.1-0.3 parts (w/w) of a second semifluid component characterized in that:

• said first component comprises:
• from 20 to 35 parts (w/w) of a bitumen having a softening point of at least 90.degree. C.,
• from 1.5 to 7 parts (w/w) of a hydrocarbon resin,
• from 0.5 to 5 parts (w/w) of an alkylbenzene,
• from 35 to 60 parts (w/w) of resin oil comprising a mixture of rosin acids and esters, and
• from 10 to 30 parts (w/w) of olein, and
• said second component comprises
• from 40 to 60 parts (w/w) of a mixture of partially hydrogenated terphenyls and quaterphenyls,
• from 0.5 to 5 parts (w/w) of a styrene/butadiene block copolymer,
• from 5 to 30 parts (w/w) calcium oxide, and
• from 10 to 30 parts (w/w) of calcium hydroxide;
• and permitting the mixture to solidify.