Conductive roller composition of chloroprene rubber,...

Details Conductive roller composition of chloroprene rubber,... Conductive roller composition of chloroprene rubber,...

2011-04-26

2011-04-26

Sellers, Robert (Department: 1765)

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...

C252S511000, C399S279000, C524S567000, C524S612000

Reexamination Certificate

active

07932318

ABSTRACT:
A polymer composition for a conductive roller composed of a rubber component whose main component is an epichlorohydrin rubber containing ethylene oxide at not less than 55 mol % nor more than 95 mol %. Thioureas are added to 100 g of the rubber component as a crosslinking agent at a rate not less than 0.014 mol nor more than 0.080 mol. In a compression set test of a vulcanized rubber described in JIS K6262, a compression set measured at 70° C. for 22-24 hours is less than 15%; and in a volume resistivity value test described in JIS K6911, a volume resistivity value measured at an applied voltage of 1000V is less than 107.5[Ω·cm].

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