Semiconductive silicone rubber compositions and semiconductive s

Details Semiconductive silicone rubber compositions and semiconductive s Semiconductive silicone rubber compositions and semiconductive s

1996-07-12

1998-03-10

Nakarani, D. S.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

252510, 252511, 428 3692, 428447, 428450, 492 53, 492 56, 492 59, 524432, 524474, 524492, 524493, 524495, 524496, 524506, 524789, 524848, 524860, 524861, 524862, B32B 1506, B32B 2520, C08L 8300

Patent

active

057259224

ABSTRACT:
The invention provides a semiconductive silicone rubber composition comprising (A) an organopolysiloxane containing at least two aliphatic unsaturated groups, (B) reinforcing silica powder having a specific surface area of at least 50 m.sup.2 /g, (C) a conductive agent, (D) a hydrocarbon oil having a heat loss of up to 30% at 200.degree. C./4 hours, and (E) a curing agent. Cured silicone rubber of the composition has a resistance of 1.times.10.sup.3 to 1.times.10.sup.12 .OMEGA. which remains stable for long-term use. The semiconductive silicone rubber composition is appropriate as a semiconductive roll stock for the manufacture of charging rolls, transfer rolls and developing rolls in business machines.

REFERENCES:
patent: 4891400 (1990-01-01), Schwabe et al.
patent: 5458937 (1995-10-01), Nakamura et al.

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