Imaging member for offset printing applications

Patent metadata

Field	Value
Publication number	US-9567486-B2
Application number	US-201213601920-A
Country	US
Kind code	B2
Filing date	Aug 31, 2012
Priority date	Aug 31, 2012
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An imaging member includes a surface layer comprising a fluoroelastomer-silicone composite formed from a reaction mixture comprising a fluoroelastomer, an oxyaminosilane, and an oxysilane-terminated compound. Methods of manufacturing the imaging member and processes for variable lithographic printing using the imaging member are also disclosed.

First claim

What is claimed is:

1. An imaging member for digital offset lithographic image forming, comprising:
a substrate; and
a reimageable surface layer on and surrounding the substrate that forms an outer surface layer of the imaging member, the reimageable surface layer having a micro-roughened surface and being formed of a fluoroelastomer-silicone composite formed from a reaction mixture comprising a fluoroelastomer, an oxyaminosilane, and an oxysilane-terminated compound,
wherein:
a weight ratio of fluoroelastomer to oxyaminosilane is in a range of between 50:40 and 85:5;
a mole ratio of the oxyaminosilane to the oxysilane-terminated compound is in a range between 2:1 and 1:10;
the weight ratio and the mole ratio are maintained in a final surface layer;
the surface layer further includes an infrared-absorbing filler material; and
the infrared-absorbing filler material is one of carbon-nanotubes and graphene.

2. The imaging member of claim 1 , wherein the oxyaminosilane is an amino-terminated siloxane.

3. The imaging member of claim 1 , wherein the amino-terminated siloxane is an aminopropyl terminated polydimethylsiloxane.

4. The imaging member of claim 3 , wherein the amino-terminated siloxane has a molecular weight in a range of between 500 and 1500.

5. The imaging member of claim 1 , wherein the oxysilane-terminated compound is a triethoxysilylethyl terminated polydimethylsiloxane.

6. The imaging member of claim 1 , wherein the oxysilane-terminated compound is a perfluoropolyether with terminal ethoxysilane groups.

7. The imaging member of claim 1 , wherein the filler is present in an amount of from 5 to 20 weight percent of the surface layer.

8. The imaging member of claim 1 , wherein the filler has an average particle size of from 2 nanometers to 10 microns.

9. The imaging member of claim 1 , wherein the reaction mixture further comprises a ketone solvent.

Assignees

• Gervasi David J
• Kanungo Mandakini
• Ornatska Maryna
• Badesha Santokh S
• Kelly Matthew M
• Lestrange Jack
• Howe Patrick J
• Xerox Corp

Inventors

• Gervasi David J
• Kanungo Mandakini
• Ornatska Maryna
• Badesha Santokh S
• Kelly Matthew M
• Lestrange Jack
• Howe Patrick J

Classifications

• C08G77/18

  to alkoxy or aryloxy groups · CPC title

• B41F7/00

  Rotary lithographic machines {(such office printing machines B41L7/00)} · CPC title

• C08G77/26

  nitrogen-containing groups · CPC title

• B41J2002/012

  with intermediate transfer member · CPC title

• C09D183/04 Primary

  Polysiloxanes · CPC title