Liquid addition-curable silicone rubber composition for fixing roller purpose, and fixing roller
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsShigeki Shudo, Shigeru Ubukata
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AssigneeShin-Etsu Chemical Co., Ltd.
InventorsShigeki Shudo, Shigeru Ubukata
Estimating the term…
A fixing roller purpose liquid addition-curable silicone rubber composition including (A) 100 parts by weight of an organopolysiloxane having in one molecule at least two alkenyl groups bonded to silicon atoms; (B) from 1 part by weight to 30 parts by weight of an organopolysiloxane having hydroxyl groups at both terminals of the molecular chain; (C) an organohydrogenpolysiloxane having in one molecule at least two hydrogen atoms bonded to silicon atoms; and (D) a platinum group metal compound in a catalytically effective quantity. The SiH groups in the component (C) is present in an amount of from 0.4 to 5.0 equivalent weight per one alkenyl group in the component (A). This composition is a substantially non-foamable and addition-curable liquid silicone rubber composition, which is therefore suitable for the fixing roller purpose. The composition has a good moldability to a mandrel and enables production of a fixing roller with a silicone rubber layer having superior toner releasability and mechanical strength.
A fixing roller comprising a mandrel and an outermost silicone rubber layer formed of a cured product of an addition-curable liquid silicone rubber composition provided on the outer periphery of said mandrel, said composition comprising:
Dependencies are inferred from the claim text.