Interference pigment, and cosmetic preparation, coating material, ink, and resin composition each containing same

Patent metadata

Field	Value
Publication number	US-11324671-B2
Application number	US-201615578605-A
Country	US
Kind code	B2
Filing date	May 31, 2016
Priority date	Jun 1, 2015
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

The present invention provides an interference pigment that develops interference colors even on light-colored bases. An interference pigment 1 of the present invention includes: a flaky inorganic substrate 10; a transparent metal layer 20 that coats the inorganic substrate 10; and a metal oxide layer 30 that coats the metal layer 20.

First claim

The invention claimed is:

1. An interference pigment comprising:
a flaky inorganic substrate;
a transparent metal layer that coats the inorganic substrate; and
a metal oxide layer that coats an outer surface of the transparent metal layer and is in contact with the transparent metal layer;
wherein the metal oxide layer is an outermost layer of the interference pigment,
the metal oxide layer has an average thickness of 80 nm to 350 nm, and
the metal oxide layer includes 99 atom % or more of rutile titanium oxide;
the inorganic substrate comprises at least one material selected from the group consisting of glass, mica, silica, and alumina,
the transparent metal layer is a metal selected from the group consisting of silver, gold, and an alloy of gold and silver;
wherein the interference pigment has:
a color difference ΔE with respect to a blank measured according to the CIE 1976 (L*a*b*) color system that is 4 or more and 20 or less, and
a reflectance for light having a wavelength of 680 nm that is 60% or more and 75.5% or less.

2. The interference pigment according to claim 1 , wherein, when the metal oxide layer is referred to as a first metal oxide layer, the interference pigment further comprises a second metal oxide layer that is formed between the inorganic substrate and the metal layer and that coats the inorganic substrate.

3. The interference pigment according to claim 1 , wherein the metal is at least one selected from the group consisting of silver and gold.

4. The interference pigment according to claim 1 , wherein the metal layer has an average thickness of 5 nm or less.

5. The interference pigment according to claim 1 , wherein the metal layer has an average thickness of 2 nm or less.

6. The interference pigment according to claim 1 , wherein, when the metal oxide layer that coats the metal layer is referred to as a first metal oxide layer, the first metal oxide layer is coated with a laminated layer comprising one or more transparent metal layers and one or more metal oxide layers that are laminated alternately.

7. A cosmetic comprising the interference pigment according to claim 1 .

8. A paint comprising the interference pigment according to claim 1 .

9. An ink comprising the interference pigment according to claim 1 .

10. A resin composition comprising the interference pigment according to claim 1 .

11. The interference pigment according to claim 1 , wherein the material of the inorganic substrate is glass,
the metal of the transparent metal layer is selected from the group consisting of silver and gold.

12. An interference pigment consisting of:
a flaky inorganic substrate;
a transparent metal layer that coats the inorganic substrate;
a metal oxide layer that coats an outer surface of the transparent metal layer; and
optionally a laminated layer that coats an outer surface of the metal oxide layer, consisting of one or more transparent metal layers and one or more metal oxide layers that are laminated alternately,
wherein the material of the inorganic substrate is glass,
the substrate has an average thickness of 0.1 μm to 10 μm,
the metal of the transparent metal layer is at least one selected from the group consisting of silver and gold,
the metal oxide layer has an average thickness of 80 nm to 350 nm, and
the metal oxide layer includes 99 atom % or more of rutile titanium oxide.

13. An interference pigment consisting of:
a flaky inorganic substrate;
a second metal oxide layer that coats the inorganic substrate;
a transparent metal layer that coats the second metal oxide layer;
a first metal oxide layer that coats an outer surface of the transparent metal layer; and
optionally a polyvalent metal compound layer coating the first metal oxide layer, the polyvalent metal compound layer consisting essentially of a hydroxide or hydrated oxide of at least one element selected from the group consisting of lanthanum, cerium, neodymium, and aluminum,
wherein the material of the inorganic substrate is glass,
the substrate has an average thickness of 0.1 μm to 10 μm,
the metal of the transparent metal layer is at least one selected from the group consisting of silver and gold,
the second and the first metal oxide layer has an average thickness of 80 nm to 350 nm, and
the second and the first metal oxide layer includes 99 atom % or more of rutile titanium oxide.

Assignees

• Nippon Sheet Glass Co Ltd

Inventors

• Hioki Masahiro

Classifications

• C09C1/0015 Primary

  Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings · CPC title

• A61K2800/436

  Interference pigments, e.g. Iridescent, Pearlescent · CPC title

• A61K8/25 Primary

  Silicon; Compounds thereof · CPC title

• C09C3/063

  Coating · CPC title

• C09D11/037

  characterised by the pigment · CPC title