JP2008299119A5

JP2008299119A5 -

Info

Publication number: JP2008299119A5
Application number: JP2007145626A
Authority: JP
Filing date: 2007-05-31
Publication date: 2010-07-15
Anticipated expiration: 2027-05-31

Claims

A process cartridge that includes at least a photosensitive member and a charging member that charges the photosensitive member, and is detachable from an electrophotographic apparatus main body,
The photoreceptor is
A conductive support and a photosensitive layer; and
It has a repeating structural unit represented by the following general formula (1) and a repeating structural unit represented by the following general formula (2), one or both of the terminals have a terminal structure represented by the following general formula (3) , also includes a general formula (2) and the general formula (3) is m = n der relationship average repeating number m and n of the siloxane unit Ru in polycarbonate polymer, a polydimethylsiloxane represented by the following chemical formula (4) It has a surface layer,
The charging member includes a hydrolyzable silane compound represented by the following formula (5), a hydrolyzable silane compound having an aryl group represented by the following formula (6), and a cationically polymerizable compound represented by the following formula (7). A polysiloxane obtained by cleaving the cationically polymerizable group of a condensate having a cationically polymerizable group obtained by hydrolyzing a hydrolyzable silane compound having a different group, and having the chemical formula (4) A process cartridge having a surface layer having an outermost surface having a contact angle with respect to polydimethylsiloxane represented by the formula of 10.0 ° to 70.0 ° .

(In formula (1), X is a single bond, —O—, —S—, or a substituted or unsubstituted alkylidene group, and R ^{11 to} R ¹⁸ are each independently a hydrogen atom, a halogen atom, or an alkoxy group. A nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and * represents a bonding position.)

(In the formula (2), R ²¹ and R ²² are each independently a hydrogen atom, an alkyl group or an aryl group, and R ^{23 to} R ²⁶ are each independently a hydrogen atom, a halogen atom, substituted or unsubstituted. A represents an integer of 1 to 30, m represents an integer of 1 to 500, and * represents a bonding position.)

(In Formula (3), R ³¹ and R ³² are each independently a hydrogen atom, a halogen atom, an alkoxy group, a nitro group, a substituted or unsubstituted alkyl group or an aryl group, and R ³³ and R ³⁴ are each Independently a hydrogen atom, an alkyl group or an aryl group, R ^{35 to} R ³⁹ each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group or an aryl group, and b is 1 to 30 (An integer, n represents an integer of 1 to 500. * represents a bonding position.)

(In formula (4), l represents the average number of repeating units.)

(In the formula (5), R ⁵¹ and R ⁵² are each independently a substituted or unsubstituted alkyl group, Z ⁵¹ is a divalent organic group, and Rf ⁵¹ is a fluorinated C 1-11 carbon atom. An alkyl group, f is an integer of 0 to 2, g is an integer of 1 to 3, and f + g = 3.)

(In Formula (6), R ⁶¹ and R ⁶² are each independently a substituted or unsubstituted alkyl group, Ar ⁶¹ is an aryl group, i is an integer of 0 to 2, j is 1 to 3) (It is an integer and i + j = 3.)

(In formula (7), R ⁷¹ and R ⁷² are each independently a substituted or unsubstituted alkyl group, Z ⁷¹ is a divalent organic group, and Rc ⁷¹ is a cationically polymerizable group. D is an integer from 0 to 2, e is an integer from 1 to 3, and d + e = 3.)

The surface layer of the photoreceptor is
The polydimethylsiloxane represented by the chemical formula (4) is contained in a proportion of 5% by mass or more and 20% by mass or less based on the polycarbonate polymer , and
The polydimethylsiloxane represented by the chemical formula (4) and the polycarbonate polymer are contained at a ratio of 0.1% by mass or more and 5.0% by mass or less with respect to the total solid content of the surface layer. Process cartridge.

M in the general formula (2), n in the general formula (3), and l in the chemical formula (4) are 10 to 100 , and m = n = 1, The process cartridge according to claim 1 or 2, wherein the proportion of the siloxane part in the coalescence is 10 mass% or more and 60 mass% or less.

Wherein a in the general formula (2) is 3 or less, neither R ²³ or R ²⁶ is a methyl group, and wherein it b is 3 or less in the general formula (3), both R ³³ to R ³⁹ is the process cartridge according to any one of claims 1 to 3 methyl groups.

A process cartridge according to any one of claims 1 to 4 number ratio Y of fluorine atoms contained per unit area of the outermost surface is less than 40.00% or more 5.00% of the surface layer of the charging member .

The process cartridge according to claim 1 , wherein the cationically polymerizable group is an epoxy group.