Patent ID: 8491994
Filing Date: 2013-07-23
Classification: C08K,C08L,G03G,Y10T

Abstract:
1. A conductive rubber elastic material comprising: a matrix containing at least one ionically conductive rubber selected from the group consisting of epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, epichlorohydrin-ethylene oxide-allyl glycidyl ether rubber, acrylonitrile-butadiene rubber and a hydrogenated product of acrylonitrile-butadiene rubber; and domains composed of an electronically conductive rubber material containing i) a rubber having a butadiene skeleton and ii) carbon black, where; the rubber having a butadiene skeleton is modified at a molecular terminal thereof with at least one atomic group selected from the group consisting of atomic groups represented by the following formula (1) to (6): wherein an asterisk * represents the position of bonding with a terminal carbon atom the rubber having a butadiene skeleton has, X 1 represents OH or SH, and R 101 to R 105 and R 201 to R 205 each independently represent a hydrogen atom or a monovalent substituent; wherein an asterisk * represents the position of bonding with a terminal carbon atom the rubber having a butadiene skeleton has, X 2 represents OH or SH, R 4 represents a hydrogen atom or a monovalent substituent, and R 3 and R 5 represent hydrocarbon chains necessary to combine with each other to form a nitrogen-containing 4- to 6-membered ring together with the carbon atom and nitrogen atom in the formula-(2) atomic group or each independently represent a hydrogen atom or a monovalent substituent; wherein P represents the main chain of the rubber having a butadiene skeleton; R 6 is an alkylene group having 1 to 12 carbon atom(s); R 7 and R 8 are each independently an alkyl group having 1 to 20 carbon atom(s); and n is an integer of 1 or 2, m is an integer of 1 or 2 and k is an integer of 1 or 2, provided that n+m+k is an integer of 3 or 4; wherein P represents the main chain of the rubber having a butadiene skeleton, R 9 is an alkylene group having 1 to 12 carbon atom(s); R 10 and R 11 are each independently an alkyl group having 1 to 20 carbon atom(s); and j is an integer of 1 to 3 and h is an integer of 1 to 3, provided that j+h is an integer of 2 to 4; wherein an asterisk * represents the position of bonding with a terminal carbon atom the rubber having a butadiene skeleton has, R 12 represents an alkyl group having 1 to 18 carbon atom(s), R 13 represents an alkylene group having 1 to 6 carbon atom(s), X 3 represents OH or SH, and M 1 represents an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); and wherein asterisks *'s each represent the position of bonding with a terminal carbon atom the rubber having a butadiene skeleton has, R 14 and R 15 each independently represent an alkylene group having 1 to 6 carbon atom(s), X 4 and X 5 each independently represent OH or SH, and M 2 and M 3 each independently represent an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s).