Harima Chemicals, Incorporated

Bridgestone Corporation

Yasuyoshi Sanada

Masanao Kono

Yasutaka Nishi

Shinsuke Ohara

Tatsuji Mizuta

Yoshihiro Hasegawa

Ryo Inoue

Hitoshi Kondo

Yasushi Hirata

A conductive high molecular composition which comprises a non-conductive polymer component incorporated with a metal salt, characterized in that the metal salt is a salt of a metal with an acid substance selected from an organic carboxylic acid, rosin and a rosin derivative. This composition has an insulating property in normal state but functions as an electroconductive material only in the event it is interposed between slightly spaced metals and heated. Thus, the composition can be used not only as an insulating binder but also for imparting conductivity only in the desired spots of electronic parts, keeping the other areas of the parts electrically insulated. The composition thus possessing a specific dual function is particularly useful in the field of electronic industry.

Method for the manufacture of electronic circuits utilizing a

A conductive high molecular composition which comprises a non-conductive polymer component incorporated with a metal salt, characterized in that the melt salt is a salt of a metal with an acid substance selected from an organic carboxylic acid, rosin and a rosin derivative. This composition has an insulating property in the normal state but functions as an electroconductive material only in the event it is interposed between slightly spaced metals and heated. Thus, the composition can be used not only as an insulating binder but also for imparting conductivity only in the desired spots of electronic parts, keeping the other areas of the parts electrically insulated. The composition thus possessing a specific dual function is particularly useful in the electronic industry field.

Conductive high molecular weight composition

A rubber composition in which a metal salt between a resin acid and cobalt is blended in a content of from 0.05 to 0.7 part by weight in terms of the content of a metal element with respect to 100 parts by weight of rubber containing not less than 70% by weight of at least one rubber of natural rubber and a synthetic polyisoprene rubber; as the metal salt is used a cobalt resinate which has a melting point in a range of 140.degree. to 180.degree. C., an oxidation degree of not more than 60% in a gas chromatography (GLC), and not more than 2,000 ppm of a sulfur concentration in the metal salt; when the metal salt is divided into a dissolved portion and an undissolved portion by using toluene and water, the undissolved portion in both toluene and water has a characteristic absorption of around 3,600 cm.sup.-1 in an infrared absorption spectrum (IR); and when elevated in temperature at a rate of 5.degree. C./min. in a differential scanning calorimeter (DSC), the cobalt resinate has endothermic peaks in ranges of 250.degree. to 350.degree. C. and 300.degree. to 420.degree. C., respectively.

Rubber composition

Growing community of inventors

Kakogawa, Japan

Yasuyoshi Sanada