ADDITION CURING TYPE LIQUID CONDUCTIVE SILICONE RUBBER COMPOSITION FOR DEVELOPING ROLLER AND DEVELOPING ROLLER

摘要

PROBLEM TO BE SOLVED: To provide an addition curing type liquid conductive silicone rubber composition for developing rollers, which has volume resistivity of ≤1 kΩ×m and good compression set, gives cured products little in the irregularity of roll dimensions by the differences of raw material lots and molding conditions, and has excellent moldability, and to provide a developing roller obtained by curing the same.;SOLUTION: This addition curing type liquid conductive silicone rubber composition for developing rollers comprises (A) 100 pts.mass of an organopolysiloxane containing at least two silicon atom-bound alkenyl groups in one molecule, (B) 0.1 to 30 pts.mass of an organo hydrogen polysiloxane containing at least two silicon atom-bound hydrogen atoms in one molecule, (C) 0.5 to 30 pts.mass of conductive powder, and (D) a catalytic amount of an addition reaction catalyst, and contains low molecular polysiloxanes having a degree of polymerization of 3 to 20 in an amount of ≤1 mass%.;COPYRIGHT: (C)2008,JPO&INPIT