Electrophotographic member with silicone graft copolymer in surface layer

Claim 2

An electrophotographic image holding member which comprises a surface layer containing a silicone type comb shaped graft polymer having a silicone portion at the side chain.

Claim 3

The image holding member according to claim 1 in which the silicone type comb shaped graft polymer is produced by copolymerization of a compound having a copolymerizable functional group with a modified silicone which is a condensation reaction product of a silicone selected from the following formulas (I) and (II) and a silicone selected from the following formulas (III), (IV) and (V): ##STR243## where R 1 -R 5 are selected from alkyl and aryl, and n is an average degree of polymerization; ##STR244## where R 6 and R 7 are selected from alkyl and aryl, and n is an average degree of polymerization; ##STR245## where R 8 , R 9 and R 10 are selected from hydrogen, halogen, alkyl and aryl, R 11 is selected from alkyl and aryl, A is arylene, X is selected from halogen and alkoxy, and n is an integer of 1-3; ##STR246## where R 12 , R 13 , and R 14 are selected from hydrogen, halogen, alkyl and aryl, R 15 is selected from alkyl and aryl, X is selected from halogen and alkoxy, and n is an integer of 1-3; ##STR247## where R 16 is selected from hydrogen, alkyl, aryl and aralkyl, R 17 is selected from alkyl and aryl, X is selected from halogen and alkoxy, m is 0 or 1, 1 is an integer of 0-2 when m=0, 1 is 2 when m=1, and n is an integer of 1-3.

Claim 4

The image holding member according to claim 1 in which the content of the graft polymer in the surface layer of the image holding member is 0.01-10% by weight.

Claim 5

The image holding member according to claim 1 in which the surface layer is provided on a photoconductive layer.

Claim 6

The image holding member according to claim 1 in which the surface layer itself is a photoconductive layer.

Claim 7

The image holding member according to claim 5 in which the photoconductive layer contains a photoconductive polymer.

Claim 8

The image holding member according to claim 5 in which the photoconductive layer is composed of photoconductive particles dispersed or dissolved in a binder.

Claim 9

The image holding member according to claim 5 in which the photoconductive layer is constituted of a charge generation layer containing a charge generating material and a charge transport layer containing a charge transporting material.

Claim 10

The image holding member according to claim 2 in which the content of a modified silicone in the silicone type comb shaped graft polymer is 5-90% by weight.

Claim 11

The image holding member according to claim 9 in which the content of a modified silicone is 10-70% by weight.

Claim 12

The image holding member according to claim 2 in which the compound having a polymerizable functional group is a polymerizable monomer not having a silicon atom.

Claim 13

The image holding member according to claim 2 in which the compound having a polymerizable functional group is a macromonomer composed of a low molecular weight polymer having a polymerizable functional group at the end portion.