Production method of rubber composition

Abstract

A method for producing a rubber composition which gives a cross-linked rubber which has a low volume resistivity value, which is low in hardness, and which is kept down in contamination of the photoconductor when used as a conductive member is provided, that is, a production method of a rubber composition comprising a step of mixing a polyether rubber which is dissolved in a solvent at 0.1 to 30 wt % of concentration and a liquid ethylenically unsaturated nitrile-conjugated diene copolymer rubber in a solution is provided.

1 . A production method of a rubber composition comprising a step of mixing a polyether rubber which is dissolved in a solvent at 0.1 to 30 wt % of concentration and a liquid ethylenically unsaturated nitrile-conjugated diene copolymer rubber in a solution. 
     
     
         2 . The production method of a rubber composition as set forth in  claim 1 , wherein, in a rubber component which forms the rubber composition, the ratio of said polyether rubber is 60 to 99 wt % and the ratio of said liquid ethylenically unsaturated nitrile-conjugated diene copolymer rubber is 40 to 1 wt %. 
     
     
         3 . The production method of a rubber composition as set forth in  claim 1 , wherein said liquid ethylenically unsaturated nitrile-conjugated diene copolymer rubber is a liquid acrylonitrile-butadiene rubber. 
     
     
         4 . The production method of a rubber composition as set forth in  claim 1 , wherein said polyether rubber contains ethylene oxide monomer units in an amount of 40 to 80 mol %. 
     
     
         5 . A rubber composion obtained by the production method as set forth in  claim 1 . 
     
     
         6 . A cross-linked rubber obtained by cross-linking the rubber composition as set forth in  claim 5 . 
     
     
         7 . A conductive member obtained by using the cross-linked rubber as set forth in  claim 6 .