Electrophotographic member, developing apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-10031438-B2
Application number	US-201615194828-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Jul 9, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present invention provides an electrophotographic member which can prevent generation of fogging while high quality images can be output during long-term use. The present invention is an electrophotographic member including a substrate, and an outermost layer directly or indirectly on the substrate, wherein the outermost layer contains a compound having at least a Si—O—Al bond, and the compound has a structural unit represented by Formula (1) and a structural unit represented by AlO 3/2 .

First claim

What is claimed is:

1. An electrophotographic member comprising:
a substrate; and
an outermost layer directly or indirectly disposed on the substrate,

wherein,
the outermost layer comprises a compound having at least a Si—O—Al bond, and
the compound has
a structural unit represented by Formula (1), and
a structural unit represented by Formula (2):

where R 1 and R 2 each independently represent one of Formulae (3) to (6):

where R 3 to R 7 , R 10 to R 14 , R 19 , R 20 , R 25 and R 26 each independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group, a carboxyl group, or an amino group; R 8 , R 9 , R 15 to R 18 , R 23 , R 24 and R 29 to R 32 each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms; R 21 , R 22 , R 27 and R 28 each independently represent hydrogen, an alkoxyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms; n, m, l, q, s and t each independently represent an integer of 1 or more and 8 or less; p and r each independently represent an integer of 4 or more and 12 or less; x and y each independently represent 0 or 1; and * and ** represent a position of bonding to a silicon atom and a position of bonding to an oxygen atom in Formula (1), respectively.

2. The electrophotographic member according to claim 1 , wherein an atomic ratio Al/Si of aluminum to silicon in the compound is 0.10 or more and 12.5 or less.

3. The electrophotographic member according to claim 1 , wherein the electrophotographic member is a developing member.

4. The electrophotographic member according to claim 1 , wherein the electrophotographic member is a charging member.

5. A developing apparatus comprising a developing member,
wherein the developing member comprises
a substrate, and an outermost layer directly or indirectly disposed on the substrate,
and wherein the outermost layer comprises a compound having at least a Si—O—Al bond, and
the compound has:
a structural unit represented by Formula (1); and
a structural unit represented by Formula (2):

where R 1 and R 2 each independently represent one of Formulae (3) to (6):

where R 3 to R 7 , R 13 to R 14 , R 19 , R 20 , R 25 and R 26 each independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxy group, a carboxyl group, or an amino group; R 8 , R 9 , R 15 to R 18 , R 23 , R 24 and R 29 to R 32 each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms; R 21 , R 22 , R 27 and R 28 each independently represent hydrogen, an alkoxyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms; n, m, l, q, s and t each independently represent an integer of 1 or more and 8 or less; p and r each independently represent an integer of 4 or more and 12 or less; x and y each independently represent 0 or 1; and * and ** represent a position of bonding to a silicon atom and a position of bonding to an oxygen atom in Formula (1), respectively.

6. An image forming apparatus comprising a developing apparatus,
wherein the developing apparatus comprises a developing member,
the developing member comprises
a substrate, and an outermost layer directly or indirectly disposed on the substrate,
and wherein the outermost layer comprises a compound having at least a Si—O—Al bond, and
the compound has:
a structural unit represented by Formula (1); and
a structural unit represented by Formula (2):

where R 1 and R 2 each independently represent one of Formulae (3) to (6):

where R 3 to R 8 , R 10 to R 14 , R 19 , R 20 , R 25 and R 26 each independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group, a carboxyl group, or an amino group; R 8 , R 9 , R 15 to R 18 , R 23 , R 24 and R 29 to R 32 each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms; R 21 , R 22 , R 27 and R 28 each independently represent hydrogen, an alkoxyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms; n, m, l, q, s and t each independently represent an integer of 1 or more and 8 or less; p and r each independently represent an integer of 4 or more and 12 or less; x and y each independently represent 0 or 1; and * and * * represent a position of bonding to a silicon atom and a position of bonding to an oxygen atom in Formula (1), respectively.

Assignees

• Canon Kk

Inventors

• Wakabayashi Kazuhito
• Ito Minoru
• Uesugi Tomoya

Classifications

• G03G15/0818 Primary

  characterised by the structure of the donor member, e.g. surface properties · CPC title

• G03G15/0808 Primary

  characterised by the developer supplying means, e.g. structure of developer supply roller · CPC title