US 11,939,478 B2
Metallic inks composition for digital offset lithographic printing
Mihaela Maria Birau, Hamilton (CA); C. Geoffrey Allen, Waterdown (CA); and Aurelian Valeriu Magdalinis, Newmarket (CA)
Assigned to XEROX CORPORATION, Norwalk, CT (US)
Filed by XEROX CORPORATION, Norwalk, CT (US)
Filed on Mar. 10, 2020, as Appl. No. 16/814,548.
Prior Publication US 2021/0284851 A1, Sep. 16, 2021
Int. Cl. C09D 11/00 (2014.01); B41C 1/10 (2006.01); B41M 1/06 (2006.01); C09C 1/00 (2006.01); C09C 1/24 (2006.01); C09C 1/30 (2006.01); C09C 1/36 (2006.01); C09D 11/037 (2014.01); C09D 11/101 (2014.01)
CPC C09D 11/037 (2013.01) [B41C 1/10 (2013.01); B41M 1/06 (2013.01); C09C 1/0015 (2013.01); C09C 1/0087 (2013.01); C09C 1/24 (2013.01); C09C 1/30 (2013.01); C09C 1/3607 (2013.01); C09D 11/101 (2013.01); C01P 2004/60 (2013.01); C09C 2200/102 (2013.01); C09C 2200/505 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A metallic ink composition for use in digital offset printing, comprising:
metallic effect pigment particles, wherein an average equivalent sphere diameter of at least about 90% of the metallic effect pigment particles ranges from greater than 1 micrometer (μm) to 150 μm;
at least one dispersant;
at least one curable oligomer; and
at least one photo initiator,
wherein the metallic ink composition has a first viscosity ranging from 150,000 to 1,000,000 millipascal seconds (mPa·s) at 0.1 rad/s at 25° C. and a second viscosity ranging from and 85,600 mPa·s at 100 rad/s at 35° C.,
wherein the metallic ink composition further comprises an additional colorant, and wherein the additional colorant is an organic white pigment in an amount ranging from 0 to 5% by weight.