Gold pigment
US-2015259538-A1 · Sep 17, 2015 · US
Interference pigments
US11746240B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11746240-B2 |
| Application number | US-202017296790-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2020 |
| Priority date | Oct 2, 2019 |
| Publication date | Sep 5, 2023 |
| Grant date | Sep 5, 2023 |
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- Title
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- Abstract
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- Assignees and inventors
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Abstract
Official abstract text for this publication.
The invention relates to interference pigments based on SiO 2 flakes having a broad layer-thickness distribution, and to the use thereof in paints, coatings, powder coatings, plastics and in particular in cosmetic formulations and for colouring food and pharmaceutical products.
First claim
Opening claim text (preview).
The invention claimed is: 1. Interference pigment based on a substrate mixture, wherein the substrate mixture consists of SiO 2 flakes, which SiO 2 flakes have at least 4 different thicknesses, and which SiO 2 flakes are coated with at least one high-refractive-index layer. 2. The interference pigment according to claim 1 , wherein the SiO 2 flakes have 4, 5, 6, 7 or 8 different layer thicknesses. 3. The interference pigment according to claim 1 , wherein the SiO 2 flakes differ in layer thicknesses by in each case at least 10 nm. 4. The interference pigment according to claim 1 , wherein the layer thicknesses of the SiO 2 flakes are from 100-1000 nm. 5. The interference pigment according to claim 1 , wherein the substrate mixture contains at least 4 SiO 2 flakes from the following group of SiO 2 flakes: SiO 2 flakes having a layer thickness of 360 nm SiO 2 flakes having a layer thickness of 380 nm SiO 2 flakes having a layer thickness of 400 nm SiO 2 flakes having a layer thickness of 420 nm SiO 2 flakes having a layer thickness of 440 nm SiO 2 flakes having a layer thickness of 460 nm SiO 2 flakes having a layer thickness of 480 nm SiO 2 flakes having a layer thickness of 500 nm or SiO 2 flakes having a layer thickness of 360 nm SiO 2 flakes having a layer thickness of 380 nm SiO 2 flakes having a layer thickness of 400 nm SiO 2 flakes having a layer thickness of 420 nm SiO 2 flakes having a layer thickness of 440 nm SiO 2 flakes having a layer thickness of 460 nm SiO 2 flakes having a layer thickness of 480 nm or SiO 2 flakes having a layer thickness of 300 nm SiO 2 flakes having a layer thickness of 320 nm SiO 2 flakes having a layer thickness of 340 nm SiO 2 flakes having a layer thickness of 360 nm SiO 2 flakes having a layer thickness of 380 nm SiO 2 flakes having a layer thickness of 400 nm SiO 2 flakes having a layer thickness of 420 nm SiO 2 flakes having a layer thickness of 440 nm or SiO 2 flakes having a layer thickness of 300 nm SiO 2 flakes having a layer thickness of 310 nm SiO 2 flakes having a layer thickness of 340 nm SiO 2 flakes having a layer thickness of 350 nm SiO 2 flakes having a layer thickness of 370 nm SiO 2 flakes having a layer thickness of 380 nm or SiO 2 flakes having a layer thickness of 400 nm SiO 2 flakes having a layer thickness of 420 nm SiO 2 flakes having a layer thickness of 440 nm SiO 2 flakes having a layer thickness of 460 nm SiO 2 flakes having a layer thickness of 480 nm SiO 2 flakes having a layer thickness of 500 nm SiO 2 flakes having a layer thickness of 520 nm. 6. The interference pigment according to claim 1 , wherein the substrate mixture consists of the following SiO 2 flakes: SiO 2 flakes having a layer thickness of 360 nm SiO 2 flakes having a layer thickness of 380 nm SiO 2 flakes having a layer thickness of 400 nm SiO 2 flakes having a layer thickness of 420 nm SiO 2 flakes having a layer thickness of 440 nm SiO 2 flakes having a layer thickness of 460 nm SiO 2 flakes having a layer thickness of 480 nm SiO 2 flakes having a layer thickness of 500 nm. 7. The interference pigment according to claim 1 , wherein the substrate mixture is coated with at least one high-refractive-index layer having a refractive index of n>1.8. 8. The interference pigment according to claim 1 , wherein the high-refractive-index layer is selected from the group consisting of metal oxides, BiOCl, metal hydroxides, metals, metal sulfides and mixtures thereof. 9. The interference pigment according to claim 1 , wherein the high-refractive-index layer is selected from the group consisting of TiO 2 , Fe 2 O 3 , FeOOH, Fe 3 O 4 , ZrO 2 , SnO 2 , ZnO, BiOCl and mixtures thereof. 10. The interference pigment according to claim 1 , wherein the flakes are coated with TiO 2 , Fe 2 O 3 , FeOOH, Fe 3 O 4 or a mixture thereof. 11. The interference pigment according to claim 1 , wherein the SiO 2 flakes are coated with at least one high-refractive-index layer and at least one low-refractive-index layer. 12. The interference pigment according to claim 1 , wherein the substrate mixture containing SiO 2 flakes is coated with alternating layers of at least one high-refractive-index layer and at least one low-refractive index layer. 13. The interference pigment according to claim 1 , wherein the low-refractive-index layer is selected from the group consisting of SiO 2 , MgO and MgO*SiO 2 . 14. The interference pigment according to claim 1 , wherein the SiO 2 flakes have a surface coating selected from the group consisting of: substrate mixture+TiO 2 substrate mixture+Fe 2 O 3 substrate mixture+FeOOH substrate mixture+Fe 3 O 4 substrate mixture+TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +Fe 2 O 3 substrate mixture+TiO 2 +FeOOH substrate mixture+TiO 2 +Fe 3 O 4 substrate mixture+TiO 2 +SiO 2 substrate mixture+Fe 2 O 3 +SiO 2 substrate mixture+FeOOH+SiO 2 substrate mixture+Fe 3 O 4 +SiO 2 substrate mixture+TiO 2 +SiO 2 /Al 2 O 3 substrate mixture+TiO 2 +Al 2 O 3 substrate mixture+Fe 2 O 3 +Al 2 O 3 substrate mixture+FeOOH+Al 2 O 3 substrate mixture+Fe 3 O 4 +Al 2 O 3 substrate mixture+Cr 2 O 3 substrate mixture+SnO 2 substrate mixture+SiO 2 substrate mixture+ZrO 2 substrate mixture+ZnO substrate mixture+TiO 2 +SiO 2 +TiO 2 substrate mixture+TiO 2 +Al 2 O 3 +TiO 2 substrate mixture+TiO 2 +MgO*SiO 2 +TiO 2 substrate mixture+TiO 2 +CaO*SiO 2 +TiO 2 substrate mixture+TiO 2 +Al 2 O 3 *SiO 2 +TiO 2 substrate mixture+TiO 2 +B 2 O 3 *SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +SiO 2 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +SiO 2 +SnO 2 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +Al 2 O 3 +TiO 2 substrate mixture+Fe 2 O 3 +Al 2 O 3 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +MgO*SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +CaO*SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +Al 2 O 3 *SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +B 2 O 3 *SiO 2 +TiO 2 substrate mixture+Fe 2 O 3 +MgO*SiO 2 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +CaO*SiO 2 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +Al 2 O 3 *SiO 2 +Fe 2 O 3 substrate mixture+Fe 2 O 3 +B 2 O 3 *SiO 2 +Fe 2 O 3 substrate mixture+TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 substrate mixture+TiO 2 /Fe 2 O 3 +Al 2 O 3 +TiO 2 substrate mixture+TiO 2 /Fe 2 O 3 +MgO*SiO 2 +TiO 2 substrate mixture+TiO 2 /Fe 2 O 3 +CaO*SiO 2 +TiO 2 substrate mixture+TiO 2 /Fe 2 O 3 +Al 2 O 3 *SiO 2 +TiO 2 substrate mixture+TiO 2 /Fe 2 O 3 +B 2 O 3 *SiO 2 +TiO 2 substrate mixture+TiO 2 +SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 /Fe 2 O 3 +MgO*SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +Al 2 O 3 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +MgO*SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +CaO*SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +Al 2 O 3 *SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +B 2 O 3 *SiO 2 +TiO 2 /Fe 2 O 3 substrate mixture+TiO 2 +Al 2 O 3 +Fe 2 O 3 substrate mixture+TiO 2 +MgO*SiO 2 +Fe 2 O 3 substrate mixture+TiO 2 +CaO*SiO 2 +Fe 2 O 3 substrate mixture+TiO 2 +Al 2 O 3 *SiO 2 +Fe 2 O 3 substrate mixture+TiO 2 +B 2 O 3 *SiO 2 +Fe 2 O 3 substrate mixture+SnO 2 +TiO 2 substrate mixture+SnO 2 +Fe 2 O 3 substrate mixture+SnO 2 +FeOOH and substrate mixture+SnO 2 +Fe 3 O 4 .
Assignees
Inventors
Classifications
- C09C1/0039Primary
consisting of at least one coloured inorganic material · CPC title
comprising a core coated with only one layer having a high or low refractive index · CPC title
the core comprising at least one inorganic oxide, e.g. Al2O3, TiO2 or SiO2 · CPC title
Thickness of the core · CPC title
- C09C1/0018Primary
uncoated and unlayered plate-like particles · CPC title
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Frequently asked questions
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- What does patent US11746240B2 cover?
- The invention relates to interference pigments based on SiO 2 flakes having a broad layer-thickness distribution, and to the use thereof in paints, coatings, powder coatings, plastics and in particular in cosmetic formulations and for colouring food and pharmaceutical products.
- Who is the assignee on this patent?
- Merck Patent Gmbh
- What technology area does this patent fall under?
- Primary CPC classification C09C1/0039. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 05 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).