Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
導電性ロール
Document Type and Number:
Japanese Patent JP3869022
Kind Code:
B2
Abstract:
A conductive roll to be used as a developing roll, a charging roll, a transfer roll or the like in an electrophotographic apparatus such as a copying machine, a printer or a facsimile, of the present invention comprises a base rubber layer formed on a peripheral surface of a shaft, an intermediate layer formed on a peripheral surface of the base rubber layer, and a surface layer formed on a peripheral surface of the intermediate layer, the surface layer being composed of a resin composition comprising: (A) a silicone-grafted acrylic polymer which comprises repeating units represented by the following general formula (1), wherein an acrylic polymer portion of the silicone-grafted acrylic polymer exclusive of a structural portion derived from a siloxane has a glass-transition temperature of -35 to 30 DEG C: (wherein Y is a structural portion derived from an acrylic monomer; Z is a structural portion derived from the acrylic monomer, which has a graft portion derived from a siloxane; k is a positive number of 1 to 3,000; and n is a positive number of 1 to 3,000); and (B) an isocyanate curing agent. According to the present invention, the use of the component (B) enhances the cross-linking of the silicone-component (B) enhances the cross-linking of the silicone-grafted acrylic polymer (A), and thus the surface layer of the conductive roll has an appropriately cross-linked state, so that the conductive roll can be obtained which is superior both in smear resistance and in toner filming resistance.

Inventors:
吉川 均
有村 昭二
加地 明彦
大鍬 憲一
Application Number:
JP52597299A
Publication Date:
January 17, 2007
Filing Date:
November 10, 1998
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
東海ゴム工業株式会社
International Classes:
B29D99/00; B32B25/08; C08G18/62; C08L75/04; F16C13/00; G03G15/02; G03G15/08; G03G15/16
Domestic Patent References:
JP11267583A
Attorney, Agent or Firm:
西藤 征彦