# US 10,246,600 B2 · Preparation of high solid yellow pigment slurry

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- Number: US 10,246,600 B2
- Document ID: US10246600B2
- Status: Granted
- Kind: B2
- Application number: 15/728,753
- Filed: 2017-10-10
- Published: 2018-02-01
- Granted: 2019-04-02
- Earliest claimed: 2014-10-30
- Assignees: Behr Process Corporation
- Applicants: Behr Process Corporation
- Inventors: Yunfei Jiang; Laurence Teachout; Ming-Ren Tarng; Joseph Pace
- Web page: https://patentgrep.com/patent/US10246600B2

## CPC

- C09D 17/001: {in aqueous medium (C09D17/003, C09D17/004 take precedence)}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

A method for forming a pigmented aqueous slurry includes a step of combining a dispersant having pigment affinic groups with water to form an aqueous dispersant mixture. Pigment is added to the aqueous dispersant mixture to form an aqueous pigment mixture. The aqueous pigment composition is ground until the average particle size is less than 30 microns to form a pigmented aqueous slurry.

## Claims

### Claim 1

A method comprising:
a) combining a dispersant having pigment affinic groups with water to form an aqueous dispersant mixture, the dispersant having pigment affinic groups including a polyacrylate backbone and polyetheramine side chains attached to the polyacrylate backbone, further including an additional dispersant that is ammonium salt of a polycarboxylated polymer or copolymer;
b) adding at least one pigment to the aqueous dispersant mixture to form an aqueous pigment composition; and
c) grinding the aqueous pigment composition until the average particle size is less than 30 microns to form a pigmented aqueous slurry, the aqueous pigment composition including about 30 to 60 weight percent pigment wherein the pigment has a color with a CIE 1931 color space dominant wavelength from 570 to 590 nm.

### Claim 2 (depends on 1)

The method of claim 1 wherein the aqueous dispersant mixture is mixed after step a), the aqueous pigment composition is mixed after step b), and the pigmented aqueous slurry is mixed after step c).

### Claim 3 (depends on 1)

The method of claim 1 further comprising:
d) combining resin and paint additive to the pigmented aqueous slurry to form a paint composition.

### Claim 4 (depends on 1)

The method of claim 1 wherein the pigment affinic groups are selected from the group consisting of carboxyl moieties, phosphoric ester moieties, sulphonic ester moieties, ammonium moieties, and combinations thereof.

### Claim 5 (depends on 1)

The method of claim 1 wherein the pigment affinic groups are carboxyl groups.

### Claim 6 (depends on 1)

The method of claim 1 wherein the aqueous pigment composition is ground by ball milling, bead milling or bar milling.

### Claim 7 (depends on 1)

The method of claim 1 wherein the aqueous dispersant mixture includes from about 3 weight percent to 15 weight percent of the dispersant having pigment affinic groups.

### Claim 8 (depends on 1)

The method of claim 1 wherein the aqueous dispersant mixture includes from about 4 weight percent to 8 weight percent of the dispersant having pigment affinic groups.

### Claim 9 (depends on 1)

The method of claim 1 wherein the aqueous pigment composition and the pigmented aqueous slurry each independently include an additive selected from the group consisting of additional pigments, fillers, rheology modifiers, titanium oxide surfactants, defoamers, coalescents, biocides, and combinations thereof.