Process for the preparation of an electrically conducting thermo

Details Process for the preparation of an electrically conducting thermo Process for the preparation of an electrically conducting thermo

1977-09-23

1982-03-23

Barr, J. L.

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

524495, 524474, H01B 106

Patent

active

043211623

ABSTRACT:
A process for the preparation of an electrically conducting, thermoplastic elastomer mixture is disclosed, wherein a mixture is made of 100 parts of rubbery ethene-copolymer, 25 to 250 parts of crystalline propene-polymer and 1 to 25 parts of a carbon black with an oil (DBP) absorption of over 150 ml/100 g and a porosity index of over 100 m.sup.2 /g. A good balance between conductivity and processability is achieved, especially if the ratio between the amount of crystalline propene polymer and the amount of carbon black is greater than 6 or preferably greater than 10 and/or some oil is incorporated in the mixture. The mixture can be used for the manufacturing of cables and moulded articles.

REFERENCES:
patent: 3963647 (1976-06-01), Straub
patent: 4002595 (1977-01-01), Adelman
Armak Product Data Bulletin No. 75-79, Kejjenblack.RTM. EC Highly Conductive Carbon Black, 1975.
Fillers and Reinforcements for Plastics, Rudolph D. Deanin and Nick R. Schott, (Eds.), 1974, pp. 175-177.

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