# US 11,028,272 B2 · Glitter pigment, pigment-containing composition, and pigment-containing painted product

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- Number: US 11,028,272 B2
- Document ID: US11028272B2
- Status: Granted
- Kind: B2
- Application number: 16/465,024
- Filed: 2017-08-04
- Published: 2019-09-26
- Granted: 2021-06-08
- Earliest claimed: 2016-12-26
- Assignees: Nippon Sheet Glass Co., Ltd.
- Applicants: Nippon Sheet Glass Company, Limited
- Inventors: Koichiro Nakamura; Masahiro Hioki
- Web page: https://patentgrep.com/patent/US11028272B2

## CPC

- C09C 1/0051: {comprising a stack of coating layers with alternating low and high refractive indices, wherein the first coating layer on the core surface has the low refractive index}
- C09C 1/28: Compounds of silicon {(C09C1/0009, C09C1/0015, C09C1/0078 take precedence)}
- C09C 1/40: Compounds of aluminium {(C09C1/0009, C09C1/0015, C09C1/0078, C09C1/32 take precedence)}
- C09C 3/06: Treatment with inorganic compounds {(C09C3/006, C09C3/048 take precedence)}
- C09D 5/36: Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
- C09D 7/61: inorganic
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C09D 17/00: Pigment pastes, e.g. for mixing in paints (artists' paints C09D5/06)
- C09D 133/12: Homopolymers or copolymers of methyl methacrylate
- C09D 169/00: Coating compositions based on polycarbonates; Coating compositions based on derivatives of polycarbonates
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/84: one phase coated with the other
- C01P 2006/62: L* (lightness axis)
- C01P 2006/63: a* (red-green axis)
- C01P 2006/64: b* (yellow-blue axis)
- C08K 3/36: Silica
- C08K 3/40: Glass
- C08K 7/00: Use of ingredients characterised by shape
- C08K 9/02: Ingredients treated with inorganic substances
- C08K 2003/2227: {of aluminium}
- C08K 2003/2237: {of titanium}
- C08K 2003/2241: {Titanium dioxide}
- C09C 2200/1004: the core comprising at least one inorganic oxide, e.g. Al2O3, TiO2 or SiO2
- C09C 2200/102: the core consisting of glass or silicate material like mica or clays, e.g. kaolin
- C09C 2200/301: Thickness of the core
- C09C 2200/302: Thickness of a layer with high refractive material
- C09C 2200/303: Thickness of a layer with low refractive material
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- 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)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The present invention provides a new glitter pigment suitable for providing high-brightness whitish reflected light. The glitter pigment according to the present invention includes: a flaky substrate 1; and a silicon oxide layer 2 and a titanium oxide layer 3 formed in this order on the flaky substrate 1, wherein in the case where the flaky substrate is the glass flake, the glass flake has a thickness of 284 to 322 nm, the silicon oxide layer has a thickness of 89 to 109 nm, and the titanium oxide layer has a thickness of 51 to 86 nm. In the case where the flaky substrate is the alumina flake, the alumina flake has a thickness of 260 to 280 nm, the silicon oxide layer has a thickness of 79 to 102 nm, and the titanium oxide layer has a thickness of 47 to 87 nm.

## Claims

### Claim 1

A glitter pigment, comprising:
a flaky substrate; and
a silicon oxide layer and a titanium oxide layer formed in this order on the flaky substrate, wherein
the silicon oxide layer and the titanium oxide layer are formed on both a first principal surface and a second principal surface of the flaky substrate, the first principal surface and the second principal surface being opposite to each other,
the titanium oxide layer, the silicon oxide layer, the flaky substrate, the silicon oxide layer, and the titanium oxide layer which are arranged in this order along a thickness direction of the flaky substrate compose a five-layer optical interference system producing whitish reflected light,
the flaky substrate is an alumina flake,
the alumina flake has a thickness of 265 nm or more and 280 nm or less,
the silicon oxide layer has a thickness of 83 nm or more and 98 nm or less, and
the titanium oxide layer has a thickness of 51.5 nm or more and 71.5 nm or less, and
the glitter pigment surrounded by air produces reflected light having absolute values of a* and b* that are each 20 or less and an L* value that is 75 or more as calculated by an optical simulation.

### Claim 2 (depends on 1)

The glitter pigment according to claim 1, wherein
the alumina flake has a thickness of 265 nm or more and 275 nm or less, and
the silicon oxide layer has a thickness of 83 nm or more and 97 nm or less.

### Claim 3 (depends on 1)

A pigment-containing composition comprising the glitter pigment according to claim 1.

### Claim 4 (depends on 3)

The pigment-containing composition according to claim 3, comprising polymethylmethacrylate (PMMA) and/or polycarbonate in addition to the glitter pigment.

### Claim 5 (depends on 1)

A pigment-containing painted product, comprising:
a substrate material; and
a paint film formed on the substrate material, the paint film containing the glitter pigment according to claim 1.