Lithographic offset inks with water and filler content

Patent metadata

Field	Value
Publication number	US-9441120-B2
Application number	US-201314407216-A
Country	US
Kind code	B2
Filing date	Jun 14, 2013
Priority date	Jun 15, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

Lithographic printing inks are described, which are characterized by the inclusion of both water, in a substantially emulsified form, and inorganic filler. Inks of the present invention show improved printing properties in offset lithography, including improved transfer, reduced piling and improved mileage. They also offer cost advantages over currently available inks and the ability to minimize or eliminate entirely mineral oil from their compositions. The inks of the present invention may be used in both web-based print processes including coldset and heatset, as well as in sheetfed printing. The inks may be dried to a durable ink film at ambient temperature, with thermal energy or with actinic or electron beam radiation, or with any combination thereof.

First claim

What is claimed is:

1. A process for manufacturing an emulsified ink suitable for printing by lithography, the process comprising the steps of:
a. combining 8-15 wt % of at least one filler, one or more resin and one or more pigment or colorant to form a premilled ink, and
b. adding 10-40 wt % water to said premilled ink, with stirring under sufficient shear that the water is emulsified, and maintaining the temperature of the operation below about 60° C. and further comprising the step of adding one or more emulsifying agents, together or sequentially, when said water is being mixed with said premilled ink.

2. The process of claim 1 , wherein the water is at least 90 wt % present as a stable water-in-oil emulsion.

3. The process of claim 1 further comprising adding at least one agent selected from the group consisting of: emulsifying agent, wax, dispersing aid, photocrosslinkable ethylenically unsaturated monomer, ethylenically unsaturated oligomer, photoinitiator, organic solvent, and triglyceride oil.

4. The process of claim 1 , wherein the filler is selected from a group consisting of: calcium carbonate, clay, talc, magnesium carbonate and silica.

5. The process of claim 1 , wherein the resin is selected from the group consisting of: hydrocarbons, hybrid resins as a hydrocarbon/rosin blend, aldehyde resins, alkyd resins, maleic modified rosin esters, and phenolic modified rosin esters.

6. The process of claim 1 , wherein the pigment or colorant is selected from the group consisting of: azo dyes, anthraquinone dyes, xanthene dyes, azine dyes, and combinations thereof, Pigment Yellow 1, Pigment Yellow 3, Pigment Yellow 12, Pigment Yellow 13, Pigment Yellow 14, Pigment Yellow 17, Pigment Yellow 63, Pigment Yellow 65, Pigment Yellow 73, Pigment Yellow 74, Pigment Yellow 75, Pigment Yellow 83, Pigment Yellow 97, Pigment Yellow 98, Pigment Yellow 106, Pigment Yellow 111, Pigment Yellow 114, Pigment Yellow 121, Pigment Yellow 126, Pigment Yellow 127, Pigment Yellow 136, Pigment Yellow 138, Pigment Yellow 139, Pigment Yellow 174, Pigment Yellow 176, Pigment Yellow 188, Pigment Yellow 194, Pigment Orange 5, Pigment Orange 13, Pigment Orange 16, Pigment Orange 34, Pigment Orange 36, Pigment Orange 61, Pigment Orange 62, Pigment Orange 64, Pigment Red 2, Pigment Red 9, Pigment Red 14, Pigment Red 17, Pigment Red 22, Pigment Red 23, Pigment Red 37, Pigment Red 38, Pigment Red 41, Pigment Red 42, Pigment Red 48: 2, Pigment Red 53: 1, Pigment Red 57: 1, Pigment Red 81: 1, Pigment Red 112, Pigment Red 122, Pigment Red 170, Pigment Red 184, Pigment Red 210, Pigment Red 238, Pigment Red 266, Pigment Blue 15, Pigment Blue 15: 1, Pigment Blue 15: 2, Pigment Blue 15: 3, Pigment Blue 15: 4, Pigment Blue 61, Pigment Green 7, Pigment Green 36, Pigment Violet 1, Pigment Violet 19, Pigment Violet 23, iron oxide, chromium oxide, ferric ammonium ferrocyanide, ferric oxide black, Pigment White 6, Pigment White 7 and Pigment Black 7.

7. An emulsified energy-curable ink suitable for printing by lithography having a viscosity of about 5-100 PaS at a shear rate of about D=50 1/s comprising:
a. about 5-30 wt % of an acrylic monomer;
b. about 5-30 wt % of an acrylic oligomer;
c. about 0-25 wt % of an inert resin;
d. about 5-25 wt % of one or more colorant or pigment;
e. about 0-20 wt % of a photoinitiator;
f. about 2-20 wt % of water;
g. about 3-10 wt % of fillers;
h. about 0-4 wt % of additives; and
i. one or more photocrosslinkable compounds,
characterized in that the ink shows a peak maximum of below −40° C. for emulsified water, measured by differential scanning calorimetry (DSC) at a cooling rate of 10° C./minute.

8. The ink of claim 7 , characterized in that the water in the ink is predominantly emulsified water with a ratio of emulsified water to free water of greater than 9:1, measured by the ratio of integrated areas of heat flow in differential scanning calorimetry at 0 to −20° C. and −30 to −60° C., measured with a cooling rate of 10° C./minute.

9. The ink of claim 7 , characterized in that the emulsified water having greater than 90% of water droplets having a size of less than 13 μm.

10. The ink of claim 7 , characterized in that the ink exhibits an improved transfer of 5-100% compared to the same formulation without emulsified water, measured by the collected ink on an offset print simulator, as supplied by Mitsubishi.

11. The ink of claim 7 , characterized in that the inks have less than 6% of emulsified water and do not contain water-soluble inorganic salts or emulsifiers with an HLB value of 2-18 and do not contain water soluble monomers and resins.

12. The ink of claim 7 , wherein the pigment or colorant is selected from the group consisting of: azo dyes, anthraquinone dyes, xanthene dyes, azine dyes, and combinations thereof, Pigment Yellow 1, Pigment Yellow 3, Pigment Yellow 12, Pigment Yellow 13, Pigment Yellow 14, Pigment Yellow 17, Pigment Yellow 63, Pigment Yellow 65, Pigment Yellow 73, Pigment Yellow 74, Pigment Yellow 75, Pigment Yellow 83, Pigment Yellow 97, Pigment Yellow 98, Pigment Yellow 106, Pigment Yellow 111, Pigment Yellow 114, Pigment Yellow 121, Pigment Yellow 126, Pigment Yellow 127, Pigment Yellow 136, Pigment Yellow 138, Pigment Yellow 139, Pigment Yellow 174, Pigment Yellow 176, Pigment Yellow 188, Pigment Yellow 194, Pigment Orange 5, Pigment Orange 13, Pigment Orange 16, Pigment Orange 34, Pigment Orange 36, Pigment Orange 61, Pigment Orange 62, Pigment Orange 64, Pigment Red 2, Pigment Red 9, Pigment Red 14, Pigment Red 17, Pigment Red 22, Pigment Red 23, Pigment Red 37, Pigment Red 38, Pigment Red 41, Pigment Red 42, Pigment Red 48: 2, Pigment Red 53: 1, Pigment Red 57: 1, Pigment Red 81: 1, Pigment Red 112, Pigment Red 122, Pigment Red 170, Pigment Red 184, Pigment Red 210, Pigment Red 238, Pigment Red 266, Pigment Blue 15, Pigment Blue 15: 1, Pigment Blue 15: 2, Pigment Blue 15: 3, Pigment Blue 15: 4, Pigment Blue 61, Pigment Green 7, Pigment Green 36, Pigment Violet 1, Pigment Violet 19, Pigment Violet 23, iron oxide, chromium oxide, ferric ammonium ferrocyanide, ferric oxide black, Pigment White 6, Pigment White 7 and Pigment Black 7.

13. The ink of claim 7 , wherein the filler is selected from a group consisting of: calcium carbonate, clay, talc, magnesium carbonate and silica.

14. A process for manufacturing an emulsified ink suitable for printing by lithography, comprising the steps of:
a. combining 10-30 wt % of at least one filler, one or more resin and one or more pigment or colorant to form a premilled ink, and
b. adding 1-10 wt % water to said premilled ink, with stirring under sufficient shear that the water is emulsified, and maintaining the temperature of the operation below about 60° C.

15. The process of claim 14 , wherein the water is at least 90% present as a stable water-in-oil emulsion.

16. The process of claim 14 further comprising adding at least one agent selected from the group consisting of: emulsifying agent, wax, dispersing aid, photocrosslinkable ethylenically unsaturated monomer, ethylenically unsaturated oligomer, photoinitiator, organic solvent, and triglyceride oil.

17. The process of claim 14 , wherein the at least one filler is selected from a group consisting of: calcium carbonate, clay, talc, magnesium carbonate and silica.

18. The process for manufacturing an ink according to claim 14 , further comprising the step of adding one or more emulsifying agents, together or sequentially, when said water is being mixed with said premilled ink.

19. The process of claim 14 , wherein the one o

Assignees

• Sun Chemical Corp

Inventors

• Jung Reiner
• Gattermayer Jochen
• Gaudl Kai-Uwe
• Krishnan Ramasamy
• Keller Lars
• Bilgic Cumhur
• Jones Jeff
• Newton Jeff
• Dettling Adelbert
• Schwartz Russell

Classifications

• Y10T428/24901

  including coloring matter · CPC title

• B41M7/009

  using thermal means, e.g. infrared radiation, heat · CPC title

• B41M1/06

  Lithographic printing · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title