IP Library › Granted Patent US 12,286,538
Granted Patent B2
US 12,286,538 · App. 17/158,498 · Granted Apr 29, 2025

Modified pigments and use thereof

Inventors: Pedro Cavaleiro (Viersen, DE); Matthias Bouwman (Singapore, SG); Pascal Senter (Duisburg, DE); Philippe Favresse (Ratingen, DE)
Assignee: Evonik Operations GmbH
C09B67/002C09B67/0003C09B67/0089C09B67/009C09D7/63C09D133/06C09D175/04
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Quick Facts
Patent No.
US 12,286,538
App. No.
17/158,498
Granted
Apr 29, 2025
Kind
B2
Abstract

A modified organic pigment can be used to make a coating composition, such as a paint, a varnish, or a printing ink. The modified organic pigment is obtained by reacting the pigments during the pigment synthesis with one interface-active compound, where the interface-active compound is a compound within a three-dimensional Hansen space determined by three coordinates, Hansen solubility parameters (HSPs), D=18.21, P=8.44, H=13.16 with a radius of 6.7 units about a center of the three-dimensional Hansen space, determined with the aid of the HSPiP software, version 5.0.0.4.

Claims (34)

1. A process for producing a modified organic pigment, the process comprising:

1) providing a crude pigment;

2) Working up the crude pigment by washing and filtration;

3) Drying the crude pigment; and

4) Adding an interface-active compound before said 3) drying,

wherein said modified organic pigment is naphthol AS and said interface-active compound is a compound within a three-dimensional Hansen space determined by three coordinates, Hansen solubility parameters (HSPs), D=18.21, P=8.44, H=13.16 with a radius of 6.7 units about a center of the three-dimensional Hansen space,

determined with the aid of the HSPIP software, version 5.0.0.4.

2. The process for producing a modified organic pigment according to claim 1 , wherein

the interface-active compound is at least one member selected from the group consisting of a chemical amphiphilic compound of low molecular weight, a chemical amphiphilic compound of high molecular weight, an ionic compound of low molecular weight, an ionic compound of high molecular weight, a nonionic compound of low molecular weight, and a nonionic compound of high molecular weight.

3. The process for producing a modified organic pigment according to claim 1 , wherein

the interface-active compound is at least one member selected from the group consisting of a polyether-modified fatty acid, a polyether-modified fatty acid amide amine, a polyether-modified amine derivative, a Jeffamine derivative, a polyether-modified oil and fat, and a derivative of a polyether-modified oil and fat.

4. The process for producing a modified organic pigment according to claim 1 , wherein

the interface-active compound is a phosphorylated polyether derivative.

5. The process for producing a modified organic pigment according to claim 1 , wherein

the interface-active compound is at least one member selected from the group consisting of a polyether-modified styrene-maleic acid copolymer and a maleate resin.

6. The process for producing a modified organic pigment according to claim 1 , wherein

the surface-active compound has one or more functionalities having an affinity for a surface of the organic pigment.

7. The process for producing a modified organic pigment according to claim 1 , which comprises 5% to 50% by weight of the interface-active compound, based on 100% by weight of the modified organic pigment.

8. The process according to claim 1 , wherein

said 4) adding takes place during a synthesis which is before said 3) drying.

9. The process according to claim 1 , wherein

said 4) adding is conducted in an aqueous solution.

10. A process of making a pigment preparation, the process comprising:

producing a modified organic pigment according to claim 1 ; and

mixing a modified organic pigment obtained thereby into a pigment precursor composition.

11. A process of making a composition comprising a modified organic pigment obtained by reacting an organic pigment during organic pigment synthesis with at least one interface-active compound,

wherein the interface-active compound is a compound within a three-dimensional Hansen space determined by three coordinates, Hansen solubility parameters (HSPs), D=18.21, P=8.44, H=13.16 with a radius of 6.7 units about a center of the three-dimensional Hansen space,

determined with the aid of the HSPIP software, version 5.0.0.4, the process comprising:

mixing the modified organic pigment in a member selected from the group consisting of a paint precursor composition, a varnish precursor composition, a printing ink precursor composition, a coating material precursor composition, a floor coating precursor composition, a potting compound precursor composition, and a filling compound precursor composition,

wherein said modified organic pigment is naphthol AS.

12. The process for producing a modified organic pigment according to claim 1 , which comprises 10% to 40% by weight of the interface-active compound, based on 100% by weight of the modified organic pigment.

13. The process for producing a modified organic pigment according to claim 1 , which comprises 14% to 35% by weight of the interface-active compound, based on 100% by weight of the modified organic pigment.

14. The process according to claim 1 , wherein said 4) adding is conducted in an alkaline solution.

15. The process according to claim 1 , wherein said interface-active compound is added during a synthesis, after a synthesis or after said 2) working up, which are before said 3) drying.

Priority Claims (1)
EP 17183262 · Jul 26, 2017 · regional
Continuity (2)
Division 16044960 · Jul 25, 2018
Related Publication 20210163751A1 · Jun 3, 2021
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