公开(公告)号：US20180072899A1

公开(公告)日：2018-03-15

申请号：US15262809

申请日：2016-09-12

Applicant: XEROX CORPORATION

Inventor： C. Geoffrey ALLEN ,  Marcel P. BRETON ,  Naveen CHOPRA ,  Aurelian Valeriu MAGDALINIS ,  Jonathan Siu-Chung LEE ,  Biby E. ABRAHAM ,  James D. MAYO

IPC: C09D11/101 ,  C09D11/104 ,  B41F7/24

CPC classification number: C09D11/101 ,  B41F7/24 ,  C09D11/00 ,  C09D11/10 ,  C09D11/104 ,  C09D11/34

Abstract: An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. The ink is formulated to incorporate a gellant into the ink set to help meet the requirement of two different viscosity or temperature pairs at two different stages of the ink delivery process. In lithography imaging a bulk ink is first transferred onto an anilox roll and then onto the imaging cylinder blanket. The first transfer from bulk ink to anilox roll requires the ink to have a low viscosity while the transfer from roll to imaging blanket requires a high viscosity. The addition of the gellant will increase the viscosity difference within the allowable temperature range thus increasing process latitude and robustness.

公开(公告)号：US20180074398A1

公开(公告)日：2018-03-15

申请号：US15262750

申请日：2016-09-12

Applicant: XEROX CORPORATION ,  PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： James D. MAYO ,  Aurelian Valeriu MAGDALINIS ,  Timothy D. STOWE ,  C. Geoffrey ALLEN ,  Biby E. ABRAHAM ,  Marcel P. BRETON ,  Jonathan Siu-Chung LEE

IPC: G03F7/00 ,  C09D11/107 ,  C09D11/037 ,  B41F7/02

CPC classification number: G03F7/0002 ,  B41F7/02 ,  C09D11/03 ,  C09D11/037 ,  C09D11/101 ,  C09D11/107

Abstract: An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. A process for variable data lithographic printing includes applying a dampening fluid to an imaging member surface; forming a latent image by evaporating the dampening fluid from selective locations on the imaging member surface to form hydrophobic non-image areas and hydrophilic image areas; developing the latent image by applying an ink composition comprising an ink component to the hydrophilic image areas, the ink composition comprising a high viscosity thickening agent to raise the viscosity of the composition from about 1.05 to about 2 times higher while maintaining excellent transfer to a substrate at low temperatures.

公开(公告)号：US20180074399A1

公开(公告)日：2018-03-15

申请号：US15262776

申请日：2016-09-12

Applicant: XEROX CORPORATION

Inventor： Marcel P. BRETON ,  James D. MAYO ,  Biby E. ABRAHAM ,  Aurelian Valeriu MAGDALINIS ,  C. Geoffrey ALLEN ,  Carolyn MOORLAG ,  Jonathan Siu-Chung LEE

IPC: G03F7/00 ,  C09D11/107 ,  C09D11/037 ,  B41F7/02

CPC classification number: G03F7/0002 ,  B41F7/02 ,  B41M1/06 ,  B41M5/025 ,  B41M5/03 ,  C09D11/00 ,  C09D11/02 ,  C09D11/03 ,  C09D11/037 ,  C09D11/101 ,  C09D11/107

Abstract: An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. A process for variable data lithographic printing includes applying a dampening fluid to an imaging member surface; forming a latent image by evaporating the dampening fluid from selective locations on the imaging member surface to form hydrophobic non-image areas and hydrophilic image areas; developing the latent image by applying an ink composition comprising an ink component to the hydrophilic image areas, the ink composition comprising a high viscosity thickening agent to raise the viscosity of the composition from about 1.05 to about 2 times higher while maintaining excellent transfer to a substrate at low temperatures.