Opaque water-based inks

Patent metadata

Field	Value
Publication number	US-2020299529-A1
Application number	US-201816607246-A
Country	US
Kind code	A1
Filing date	Apr 25, 2018
Priority date	Apr 28, 2017
Publication date	Sep 24, 2020
Grant date	—

Abstract

Described herein are opaque water-based inks that include water and an opacity-providing polymer component. In one aspect, the opacity providing polymer component is a hollow sphere polymer material. The opacity-providing polymer material may replace all or part of white opacifying pigment material, such as titanium dioxide. Also described herein is a method of opacifying a printing ink by adding hollow sphere resin particles and a colorant to a printing ink that comprises water as a volatile component.

First claim

1 - 29 . (canceled)

30 . A method of opacifying a printing ink comprising adding hollow sphere resin particles and a colorant to a printing ink that comprises water as a volatile component.

31 . The method of claim 30 , wherein the colorant comprises a white pigment that, as a result of the inclusion of the hollow sphere resin particles, the amount of white pigment is reduced by 10 wt % to 30 wt % based on a printing ink that comprises a colorant comprising a white pigment material that does not include hollow sphere resin particles, wherein wear of parts of a printing press contacting the ink is reduced.

32 . The method of claim 31 , wherein the white pigment is selected from titanium dioxide, zinc sulfide, and mixtures thereof.

33 . The method of claim 30 , wherein the colorant comprises pigments and dyes that emit color in the visible, infrared, and ultraviolet spectrum, white pigments and dyes, and mixtures thereof.

34 . The method of claim 33 , wherein the colorant comprises a white pigment selected from titanium dioxide, zinc sulfide, and mixtures thereof.

35 . The method of claim 30 , wherein the colorant comprises pigments and dyes that emit color in the visible, infrared, and ultraviolet spectrum and does not include white pigments and dyes.

36 . The method of claim 30 , wherein the colorant comprises pigments and dyes that emit color in the visible spectrum.

37 . The method of claim 30 , wherein the colorant comprises pigments and dyes that emit color in the visible spectrum and does not include white pigments and dyes.

38 . The method of claim 30 , wherein the hollow sphere resin particles are voided latex particles.

39 . The method of claim 31 , wherein the hollow sphere resin particles are voided latex particles.

40 . The method of claim 30 , wherein the hollow sphere resin particles are present in an amount from about 1.0 wt % to about 50 wt %, preferably 10 wt % to about 50 wt %, more preferably 20 wt % to about 50 wt %, and more preferably 30 wt % to about 50 wt %, based on the total weight of the composition.

41 . The method of claim 30 , wherein a hollow sphere resin component is present in an amount from 10-90%, based on the total weight of the composition.

42 . The method of claim 41 , wherein the hollow sphere resin component comprises the hollow sphere resin particles and water.

43 . The method of claim 30 , wherein about 10 wt % to about 100 wt % of the volatile component is water.

44 . The method of claim 30 , further comprising a volatile component selected from alcohols, esters, aliphatic hydrocarbons, cyclic hydrocarbons, aromatic hydrocarbons, ketones, aldehydes, ethers, and mixtures thereof.

45 . The method of claim 30 , wherein the colorant comprises a pigment dispersion.

46 . The method of claim 30 , further comprising one or more waxes.

47 . The method of claim 30 , further comprising a crosslinker.

48 . A method of improving die cutting blade durability comprising the steps of printing on a substrate a printing ink comprising hollow sphere resin particles and a colorant in a printing ink that comprises water as a volatile component to provide a printed substrate, and cutting the printed substrate with a die-cutting blade, wherein the printing ink improves the durability of the die-cutting blade relative to printing inks that include large amounts of abrasive white pigment materials.

49 . The method of claim 48 , wherein the abrasive white pigment materials are selected from titanium dioxide, zinc sulfide, and mixtures thereof.

50 . The method of claim 48 , wherein the printing is performed by a printing method selected from flexographic and gravure printing.

Assignees

• Sun Chemical Corp

Inventors

• Lahr Alexander
• Marshall Bruce

Classifications

• C09D7/65 Primary

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C09D11/10 Primary

  based on artificial resins · CPC title

• C08K2003/3036

  of zinc · CPC title

• C08K2003/2241

  Titanium dioxide · CPC title