URETHANE RESIN COMPOSITION AND A CONDUCTIVE ROLLER USING SAME

• US 20140100097A1
• Filed: 05/30/2012
• Published: 04/10/2014
• Est. Priority Date: 06/16/2011
• Status: Active Grant

• Current Assignee: Archem, Inc. (Bridgestone Corporation)
• Original Assignee: Bridgestone Corporation
• Inventors: Takano, Junichi, Sirakura, Daijirou, Adachi, Mitsuaki, Kotanaka, Youichi
• Granted Patent: US 9,376,539 B2
• Time in Patent Office: Days
• US Class Current: 492/56
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 2101/00 Manufacture of cellular products
• CPC Class Codes: C08J 2201/026 Crosslinking before of after foaming
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/0023 containing oxygen
• CPC Class Codes: C08J 9/142 Compounds containing oxygen but no halogen atom
• CPC Class Codes: C08J 9/30 by mixing gases into liquid compositions or plastisols, e.g. frothing with air
• CPC Class Codes: C08K 5/103 with polyalcohols
• CPC Class Codes: C08K 5/1515 Three-membered rings
• CPC Class Codes: C08L 75/06 from polyesters
• CPC Class Codes: F16C 13/00 Rolls, drums, discs, or the like guide rollers in feeding webs B65H27/00; calender rolls, bearings therefor D21G1/02; rotary drums or rollers for heat-exchange or heat-transfer apparatus F28F5/02; Bearings or mountings therefor
• CPC Class Codes: G03G 15/0233 Structure, details of the charging member, e.g. chemical composition, surface properties
• CPC Class Codes: G03G 15/0818 characterised by the structure of the donor member, e.g. surface properties
• CPC Class Codes: G03G 15/1685 Structure, details of the transfer member, e.g. chemical composition
• CPC Class Codes: G03G 21/0058 using a roller or a polygonal rotating cleaning member; Details thereof, e.g. surface structure G03G21/0064 takes precedence

Abstract

Provided is a urethane resin composition by which an electrically conductive roller which has a higher elasticity than ever and in which an air bubble in an elastic layer is fine can be obtained when the urethane resin composition is used for the elastic layer of the electrically conductive roller, and an electrically conductive roller using the same. The urethane resin composition comprises: a urethane resin having a carboxyl group on a side chain; a cross-linking agent having an epoxy group; and an ester composed of a sugar and an unbranched saturated fatty acid having 16 to 24 carbon atoms as a foaming agent. The saturated fatty acid is preferably a stearic acid. The urethane resin composition preferably further contains a foaming auxiliary. The sugar is preferably a sucrose.

Claims

1. A urethane resin composition comprising:

a urethane resin having a carboxyl group on a side chain;

a cross-linking agent having an epoxy group; and

an ester composed of a sugar and an unbranched saturated fatty acid having 16 to 24 carbon atoms as a foaming agent.

2. The urethane resin composition according to claim 1, wherein the saturated fatty acid is a stearic acid.

3. The urethane resin composition according to claim 1, which contains a foaming auxiliary.

4. The urethane resin composition according to claim 1, wherein the sugar is a sucrose.

5. The urethane resin composition according to claim 3, wherein the foaming auxiliary is an ammonium stearate.

6. An electrically conductive roller comprising:

a shaft; and

an elastic layer and a surface layer formed on the outer periphery of the shaft sequentially, characterized in that

the elastic layer is formed by using the urethane resin composition according to claim 1.