Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1991-04-22
1992-11-17
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524436, 524496, 252511, C08K 304, H01B 106
Patent
active
051644436
ABSTRACT:
Disclosed is an electroconductive silicone composition, which contains an acetylene black having an HCl-absorption of 12 ml/5 g or less and an I-adsorption of 50 mg/g or less and which has improved workability. The composition may further contain a magnesium carbonate, a silicone oil and/or a carbon black having a mean grain size of 200 m.mu. or more and a specific surface area of 15 m.sup.2 /g or less. The it composition has improved reproducibility and temperature-dependent stability with respect to the electroconductivity as well as improved fire-resistance.
Also disclosed is a silicone ink comprising (A) an addition-curable polyorganosiloxane, (B) a carbon black having an I-adsorption of 50 mg/g or less, a mean grain size of 35 m.mu. or more and a DBP adsorption of 150 ml/100 g or more, and (C) a solvent. The ink has improved storage stability.
REFERENCES:
patent: 4250075 (1981-02-01), Monroe et al.
patent: 4273697 (1981-06-01), Sumimura et al.
patent: 4279783 (1981-07-01), Kehrer et al.
patent: 4777205 (1988-10-01), La Scola et al.
patent: 4898689 (1990-02-01), Hamada et al.
patent: 5015413 (1991-05-01), Nagaoka
"Testing Methods of Carbon Black for Rubber Industry" Japanese Industrial Standard K-6221, 1982.
Michl Paul R.
Toshiba Silicone Co. Ltd.
Yoon Tae H.
Young John L.
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