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
1995-12-22
1998-01-06
Cain, Edward J.
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...
524496, 252511, C08K 300
Patent
active
057055556
ABSTRACT:
A conductive polymer composition having PTC characteristics comprising a polymer matrix, constituting from 20 to 98 percent by weight of the composition, throughout which is dispersed a mixture of conductive carbon blacks constituting from 2 to 80 percent by weight of the composition, the mixture comprising a first conductive carbon black and a second conductive carbon black, each of the carbon blacks having a structure level, as measured by DBP technique, of 40 to 150 cc/100 g and each constitutes from 1 to 40 percent by weight of the composition, the first carbon black comprising particles having average size in the range from 35 to 300 nm and the second carbon black comprising particles having average size in the range from 15 to 25 nm.
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J. Meyer, Glass Transition Temperature as a guide to selection of polymer Suitable for PTC materials, Polymer Engineering and Science, Nov. 1973, vol. 13, No. 6, pp. 462-468.
Chemical Abstracts, vol. 107, No. 6, Aug. 10, 1987, p. 109 Abstract No. 107: 41849e (Japan 62 27472).
Funt John Morris
Guilfoy Andrew Austin
Cabot Corporation
Cain Edward J.
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