# US 4,398,955 A · Dispersions

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- Number: US 4,398,955 A
- Document ID: US4398955A
- Status: Granted
- Kind: A
- Application number: 06/276,516
- Filed: 1981-06-23
- Granted: 1983-08-16
- Earliest claimed: 1977-02-21
- Assignees: Imperial Chemical Industries PLC
- Inventors: James F. Stansfield; James Toole; Arthur Topham
- Web page: https://patentgrep.com/patent/US4398955A

## CPC

- C09D 17/004: {containing an inorganic pigment}
- C09K 23/16: Amines or polyamines
- C09K 23/46: Ethers of aminoalcohols
- 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)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A dispersion of a particulate solid in a polar organic medium in the presence of a dispersing agent which is a tertiary amine or a salt thereof with a mineral acid or an aromatic carboxylic or sulphonic acid, the amine containing at least one polymeric group which is a poly(lower alkylene oxy) chain or a poly(carbonyl lower alkylene oxy) chain and inks, paints and similar formulations made from such a dispersion.

## Claims

### Claim 1

A process for the preparation of a dispersion of an inorganic pigment in a polar organic medium, said process consisting essentially of grinding the pigment in the polar organic medium in the presence of a dispersing agent, in which the dispersing agent is a tertiary amine of the formula: ##STR5## wherein each of A, B and D independently represents ##STR6## wherein each X independently represents an oxygen or a nitrogen atom provided that, where X is oxygen m+n=1 and p=1 and where X is nitrogen m+n=2 and p is from 1 to 30; each Q independently represents alkyl or --YH; and each Y independently represents a poly(lower alkylene oxy) chain containing from 3 to 50 lower alkylene oxy groups provided that, (i) at least one of A, B and D contains a poly(lower alkylene oxy) chain, (ii) at least 50% of the lower alkylene groups in each poly(lower alkylene oxy) chain is propylene and (iii) not more than one of the alkylene or alkyl groups contains more than 8 carbon atoms; or the salt of said amine with a mineral acid or with an aromatic carboxylic or sulphonic acid.

### Claim 2

A pigment dispersion consisting essentially of an inorganic pigment, a polar organic medium and a tertiary amine of the formula: ##STR7## wherein each of A, B and D independently represents ##STR8## wherein each X independently represents an oxygen or a nitrogen atom provided that, where X is oxygen m+n=1 and p=1 and where X is nitrogen m+n=2 and p is from 1 to 30; each Q independently represents alkyl or --YH; and each Y independently represents a poly(lower alkylene oxy) chain containing from 3 to 50 lower alkylene oxy groups provided that, (i) at least one of A, B and D contains a poly(lower alkylene oxy) chain, (ii) at least 50% of the lower alkylene groups in each poly(lower alkylene oxy) chain is propylene and (iii) not more than one of the alkylene or alkyl groups contains more than 8 carbon atoms; or the salt of said amine with a mineral acid or with an aromatic carboxylic or sulphonic acid.

### Claim 3 (depends on 2)

A dispersion according to claim 2 wherein at least 65% of the lower alkylene groups in each poly(lower alkylene oxy) chain are propylene.

### Claim 4 (depends on 2)

A dispersion according to claim 2 wherein there are from 7 to 30 alkylene oxy groups in each chain.

### Claim 5 (depends on 2)

A dispersion according to claim 2 wherein the dispersing agent has the formula: ##STR9##

### Claim 6 (depends on 1)

A dispersion according to claim 1 wherein the polar organic liquid is selected from the group comprising amines, ethers, organic acids, esters, ketones, glycols, alcohols and amides.

### Claim 7 (depends on 2)

A dispersion according to claim 2 containing from 20% to 80% by weight of pigment.

### Claim 8 (depends on 7)

A dispersion according to claim 7 containing at least 40% by weight of pigment.

### Claim 9 (depends on 7)

A dispersion according to claim 7 containing at least 50% by weight of pigment.

### Claim 10 (depends on 2)

A dispersion according to claim 2 containing from 2 to 50% by weight based on the weight of the pigment, of the dispersing agent.