Patent ID: 6342324
Filing Date: 2002-01-29
Classification: C09D,G03G

Abstract:
A photoconductor element comprisingan electroconductive substrate, a photoconductive layer on one surface of the electroconductive substrate, and over the photoconductive layer, a release layer comprising a silicone polymer which is the reaction product of components comprising: (a) from zero to about 30 parts by weight of a polymer selected from the group consisting of wherein R1, R2, R3, R6, R7, R10, R11, and R12 are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least one of R6 and R7 is an alkenyl group, R4, R5, R8, and R9 are each independently selected from an alkyl group, an aryl group, and an aralkyl group, l, m, and n are each independently an integer so long as the polymer contains greater than 3 mol % vinyl-containing siloxane groups; a (vinyl siloxy)(siloxy)-modified silica having a vinyl content of at least about 0.4 vinyl equivalent/kg; and a combination thereof; (b) more than about 20 parts by weight of a polymer having the formula wherein R13, R14, R15, R18, R19, R22, R23, and R24 are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least two of R13, R14, R15, R18, R19, R22, R23, and R24 are alkenyl groups, R16, R17, R20, and R21 are each independently selected from an alkyl group, an aryl group, and an aralkyl group, p, q, and r are each independently integers so long as the polymer has less than 3 mol % vinyl-containing siloxane groups; and (c) up to about 20 parts by weight of a cross-linking agent of the formula wherein R36, R37, R38, R43, R44, and R45 are each independly selected from hydrogen, an alkyl group, an aryl group, and an aralkyl group, R39, R40, R41, and R42 are each independently selected from hydrogen, an alkyl group, and an aryl group, X is O, or a divalent organic linking group, and S and t are independently integers so long as there are at least two functional groups capable of cross-linking per molecule.