Overcoat and image forming method

Patent metadata

Field	Value
Publication number	US-10753036-B2
Application number	US-201715717499-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Sep 30, 2016
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

An overcoat to be applied to an ink printed on fabric or fabric to be printed with an ink, includes: a carbodiimide group-containing compound.

First claim

What is claimed is:

1. An overcoat to be applied to an ink printed on fabric or fabric to be printed with an ink, comprising: a carbodiimide group-containing compound, glycerin, at least one of an acrylic resin and a styrene-acrylic resin; and at least one surfactant selected from the group consisting of a polyether-modified siloxane surfactant, a polyether-modified polydimethylsiloxane surfactant, and a hydroxyl group-containing polyether-modified polydimethylsiloxane surfactant, and not comprising a coloring agent; wherein a ΔE*ab value between an area of the fabric to which the overcoat is not applied and an area of the fabric to which the overcoat is applied after washing is smaller than that before washing.

2. The overcoat according to claim 1 , wherein a content of the carbodiimide group-containing compound in a total amount of the overcoat is 0.1 wt % to 5 wt %.

3. The overcoat according to claim 1 , wherein the content of the carbodiimide group-containing compound in the total amount of the overcoat is 0.25 wt % or more.

4. The overcoat according to claim 1 , wherein the carbodiimide group-containing compound is soluble in water.

5. The overcoat according to claim 4 , wherein a content of the water-soluble carbodiimide group-containing compound in the total amount of the overcoat is 0.75 wt % or less.

6. The overcoat according to claim 5 , wherein the content of the water-soluble carbodiimide group-containing compound in the total amount of the overcoat is more than 0.25 wt %.

7. The overcoat according to claim 1 , further comprising: at least one of an acrylic resin and a styrene-acrylic resin.

8. The overcoat according to claim 7 , further comprising: a polyether-modified siloxane surfactant.

9. The overcoat according to claim 8 , wherein a content of the polyether-modified siloxane surfactant in the total amount of the overcoat is 0.1 wt % to 1 wt %.

10. The overcoat according to claim 1 , further comprising: a resin other than the carbodiimide group-containing compound, wherein the content of the carbodiimide group-containing compound (C) and the content of the resin (R) in the total amount of the overcoat satisfy C/R≤0.375.

11. The overcoat according to claim 1 , wherein a content of the glycerin in the total amount of the overcoat is 30 wt % to 50 wt %.

12. The overcoat according to claim 1 , further comprising: water.

13. The overcoat according to claim 1 , wherein a b* value of an overcoat-applied area on the ink printed on the fabric or the fabric to be printed with the ink is 4.22 or less.

14. The overcoat according to claim 1 , wherein the surfactant includes at least one of a polyether-modified polydimethylsiloxane surfactant or a hydroxyl group-containing polyether-modified polydimethylsiloxane surfactant.

15. A method for forming an image on fabric, comprising the following steps: printing an image on fabric with an ink; applying an overcoat to the ink printed on the fabric or the fabric to be printed with the ink; and thermally fixing the ink on the fabric by using a heating unit configured to heat a printed area of the fabric, wherein the overcoat comprises a carbodiimide group-containing compound, glycerin, at least one of an acrylic resin and a styrene-acrylic resin; and at least one surfactant selected from the group consisting of a polyether-modified siloxane surfactant, a polyether-modified polydimethylsiloxane surfactant, and a hydroxyl group-containing polyether-modified polydimethylsiloxane surfactant, and not comprising a coloring agent; wherein a ΔE*ab value between an area of the fabric to which the overcoat is not applied and an area of the fabric to which the overcoat is applied after washing is smaller than that before washing.

Assignees

• Brother Ind Ltd

Inventors

• Yagi Ryohei
• Okada Goro

Classifications

• D06P5/06 Primary

  containing nitrogen · CPC title

• D06P5/08

  macromolecular · CPC title

• D06P1/6493

  Carbodiimides (=N=C=N=) · CPC title

• D06P5/30

  Ink jet printing · CPC title

• D06M15/263

  of unsaturated carboxylic acids; Salts or esters thereof · CPC title