Process for preparing color dispersions and the color dispersions made thereof

Patent metadata

Field	Value
Publication number	US-10023757-B2
Application number	US-201414477263-A
Country	US
Kind code	B2
Filing date	Sep 4, 2014
Priority date	Sep 4, 2013
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a gel composition comprising a first gel selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, and a second gel selected from guar, pectin, carrageenan, gelatin, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles. A color dispersion comprising the first colorant dispersion and a color coating comprising the color dispersion.

First claim

What is claimed is:

1. A color dispersion comprising
a first colorant dispersion comprising, based on total weight of the first colorant dispersion,
from 0.05 wt. % to 10 wt. % of a first colorant;

from 0.1 wt. % to 15 wt. % of a first gel selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof; from
0.1 wt. % to 15 wt. % of a second gel selected from guar, pectin, carrageenan, gelatin, and the mixture thereof and
water; and a protective composition comprising, based on total weight of the protective composition,
from 0.5 wt. % to 70 wt. % of polymer particles;
from 0.1 wt. % to 10 wt. % of a clay; and
from 0.05 wt. % to 10 wt. % of a peptizing agent;
wherein the weight to weight ratio of the first colorant dispersion to the protective composition is from 1:10 to 10:1.

2. The color dispersion according to claim 1 wherein the first colorant dispersion further comprises, based on total weight of the first colorant dispersion, from
0.1 wt. % to 40 wt. % of polymer particles.

3. The color dispersion according to claim 1 wherein the first colorant dispersion further comprises, based on total weight of the first colorant dispersion, from 0.1 wt. % to 10 wt. % of a clay; and from 0.1 wt. % to 40 wt. % of polymer particles.

4. A color coating comprising the color dispersion according to claim 1 .

5. A process for making a color dispersion comprising
a first step of contacting water, a first colorant, and a gel composition comprising a first gel selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof; and a second gel selected from guar, pectin, carrageenan, gelatin, and the mixture thereof to form a first colorant dispersion;
wherein the first colorant dispersion comprises based on total weight of the first colorant dispersion, from 0.05 wt. % to 10 wt. % of the first colorant, from 0.1 wt. % to 15 wt. % of the first gel, and from 0.1 wt. % to 15 wt. % of the second gel; and
a second step of contacting the first colorant dispersion with a protective composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles;
wherein the protective composition comprises based on the total weight of the protective composition, from 0.5 wt. % to 70 wt. % of the polymer particles, from 0.1 wt. % to 10 wt. % of the clay, and from 0.05 wt. % to 10 wt. % of the peptizing agent wherein the weight to weight ratio of the first colorant dispersion to the protective composition is from 1:10 to 10:1.

6. The process according to claim 5 wherein the first step further comprises contacting from 0.1 wt. % to 10 wt. % based on total weight of the first colorant dispersion, of a clay, to form the first colorant dispersion.

7. The process according to claim 5 wherein the first step further comprises contacting from 0.1 wt. % to 40 wt. % based on total weight of the first colorant dispersion, of polymer particles, to form the first colorant dispersion.

8. The process according to claim 5 wherein the first step further comprises contacting based on total weight of the first colorant dispersion, from 0.1 wt. % to 10 wt. % of a clay; and from 0.1 wt. % to 40 wt. % of polymer particles, to form the first colorant dispersion.

9. The process according to claim 5 further comprising
a third step of repeating the first step and the second step with a second colorant that is different from the first colorant to form a dispersion of protected second colorant particles.

10. The process according to claim 9 further comprising
a fourth step of mixing the dispersions of protected first and second colorant particles to form a two-color dispersion.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Yun Dong
• Wang Yujiang
• Liu Hui
• Jiang Siyuan

Classifications

• C09D5/29

  for multicolour effects · CPC title

• C09D101/28

  Alkyl ethers · CPC title

• C09D101/284 Primary

  with hydroxylated hydrocarbon radicals · CPC title

• C09D7/40

  Additives · CPC title

• C09B67/0085

  Non common dispersing agents · CPC title