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
1989-11-22
1992-12-15
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...
524496, 252511, 423460, 502432, C08K 304
Patent
active
051717743
ABSTRACT:
A product having a positive temperature coefficient of resistance is formed by etching a carbon black at an elevated temperature to remove less crystalline portions and thereby to increase the specific surface area of the carbon black. The resulting carbon black is called porous carbon black. The porous carbon black is blended with a crystalline polymer to form a product having the desired positive temperature coefficient of resistance. Production of a material suitable for use as a resettable fuse is described.
REFERENCES:
patent: 4188276 (1980-02-01), Lyons et al.
patent: 4367168 (1983-01-01), Kelly
patent: 4388607 (1983-06-01), Toy et al.
patent: 4631180 (1986-12-01), Yoshimura et al.
Sugaya Syoiti
Takata Mayumi
Ueno Akira
Yamazaki Naoki
Cain Edward S.
Daito Communication Apparatus Co. Ltd.
Michl Paul R.
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