Pigment including a metal core, organic layer, and an inorganic layer

Patent metadata

Field	Value
Publication number	US-11898041-B2
Application number	US-202217708795-A
Country	US
Kind code	B2
Filing date	Mar 30, 2022
Priority date	Mar 30, 2022
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A pigment, including a flake including a metal core having a first surface and a second surface, a first dielectric layer interfacing with a first surface of the metal core, and a second dielectric layer interfacing with a second surface of the metal core; a first inorganic layer encapsulating the flake; and an organic layer encapsulating the first organic layer is disclosed. A colorant composition including the pigment is also disclosed. A method of making the pigment, and a method of making a colorant composition are also disclosed.

First claim

What is claimed is:

1. A pigment, comprising:
a flake including a metal core having a first surface and a second surface, a first dielectric layer interfacing with a first surface of the metal core, and a second dielectric layer interfacing with a second surface of the metal core;
a first inorganic layer encapsulating the flake;
an organic layer encapsulating the first inorganic layer; and
a second inorganic layer encapsulating the flake.

2. The pigment of claim 1 , wherein the first inorganic layer interfaces with the flake.

3. The pigment of claim 1 , wherein the organic layer is a multilayer including a first organic layer interfacing with a second organic layer.

4. The pigment of claim 1 , wherein the organic layer interfaces with the first inorganic layer.

5. The pigment of claim 1 , wherein the organic layer is a multilayer including alternating layers of a first organic layer interfacing with a second organic layer.

6. The pigment of claim 1 , wherein the organic layer includes one or more polyelectrolytes.

7. The pigment of claim 6 , wherein the polyelectrolyte is chosen from polyallylamine hydrochloride, polysodium 4-styrenesulfonate, and combinations thereof.

8. The pigment of claim 1 , wherein the organic layer includes a colorant.

9. The pigment of claim 1 , wherein the organic layer is multiple alternating layers of charged material.

10. The pigment of claim 1 , wherein the second inorganic layer interfaces with the organic layer.

11. The pigment of claim 1 , wherein the second inorganic layer includes an inorganic material chosen from oxides, nitrides, carbides, sulfides, compounds thereof, and combinations thereof.

12. The pigment of claim 1 , wherein the second inorganic layer includes a functional material.

13. The pigment of claim 12 , wherein the functional material is an organosilane.

14. A pigment, comprising:
a flake including a metal core having a first surface and a second surface, a first dielectric layer interfacing with a first surface of the metal core, and a second dielectric layer interfacing with a second surface of the metal core;
a first inorganic layer encapsulating the flake; and
an organic layer encapsulating the first inorganic layer;
wherein the first inorganic layer is a layer of silica.

15. A method of making a pigment, comprising:
providing a flake including a metal core having a first surface and a second surface, a first dielectric layer interfacing with a first surface of the metal core, and a second dielectric layer interfacing with a second surface of the metal core;
applying a first inorganic layer by a sol-gel process to encapsulate the flake;
applying an organic layer to encapsulate the flake and the first inorganic layer; and
after applying the organic layer, applying a second inorganic layer to encapsulate the flake, the first inorganic layer, and the organic layer.

16. The method of claim 15 , wherein the first and/or second inorganic layer has a negative or positive charge and is attracted to a positive or negative charge of the organic layer.

17. The method of claim 15 , wherein the second inorganic layer includes a functional material.

18. The method of claim 15 , wherein the pigment includes multiple interfaces to reduce propagation of cracks and increase the diffusion path of corrosive molecules.

Assignees

• Viavi Solutions Inc

Inventors

• Argoitia Alberto

Classifications

• C09C1/0066 Primary

  consisting of at least one coloured inorganic material · CPC title

• C09C3/063

  Coating · CPC title

• C09C3/12

  Treatment with organosilicon compounds {(C09C3/006 takes precedence)} · CPC title

• C09C2200/1004

  the core comprising at least one inorganic oxide, e.g. Al2O3, TiO2 or SiO2 · CPC title

• C09C2200/407

  Organosilicon materials, e.g. silanes, silicones · CPC title