US5565024A
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Color luster pigments
Assignee: Merck Patent GmbH
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Filing: 1995-04-21
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Granted: 1996-10-15
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Expires: 2015-04-21
Abstract
Abstract The present invention relates to color luster pigments which, through the incorporation of glass formers, exhibit enhanced luster and also high color strength and transparency.
Inventors
- 👤 Matthias Schraml-Marth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:10
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/11; C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0021; A61Q; A61Q1/00; A61Q1/02; C08; C08K; C08K9/00; C08K9/02; C09D; C09D5/00; C09D5/36; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/42; A61K2800/43; C01; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/60; C09C2200/00; C09C2200/10; C09C2200/1004; C09C2200/1008; C09C2200/102; C09C2200/1054; C09C2200/1087; C09C2200/30; C09C2200/301; C09C2200/40; C09C2200/401; C09C2220/00; C09C2220/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
40 words
A color luster pigment comprising a substrate coated with one or more layers of one or more metal oxides or metal oxide mixtures, wherein a metal oxide layer contains a borosilicate, or is aftercoated to provide layers containing a borosilicate.
Claim 2
Dependent Claim
40 words
A color luster pigment comprising a substrate coated with one or more layers of one or more metal oxides or metal oxide mixtures, wherein a metal oxide layer contains a borosilicate, or is aftercoated to provide layers containing a borosilicate.
Claim 3
Dependent Claim
22 words
The color luster pigment according to claim 1, wherein the proportion of borosilicate based on the total pigment is 0.05-5 mass percent.
Claim 4
Dependent Claim
13 words
The color luster pigment according to claim 1, wherein the substrate is platelet-shaped.
Claim 5
Dependent Claim
18 words
The color luster pigment according to claim 3, wherein the platelet-shaped substrate is mica or SiO 2 flakes.
Claim 6
Dependent Claim
27 words
The pigment of claim 1, wherein the metal oxide or metal oxide mixture coating comprises an oxide of titanium, iron, aluminum, zirconium, chromium, nickel cobalt or tin.
Claim 7
Dependent Claim
134 words
A process for producing a color pigment according to claim 1, comprising adding to an aqueous suspension of the substrate, a) in succession or simultaneously, one or more metal salt solutions and a boron-oxygen compound in the presence of water-soluble alkali or alkaline earth metal salt such that a metal oxide or metal oxide mixture and a borate are deposited on the substrate, an aftercoating of SiO 2 is applied, or b) a solution consisting of one or more metal salts and a water-soluble boron-oxygen compound and simultaneously but separately a water-soluble silicon compound such that a metal oxide or metal oxide mixture, B 2 O 3 and SiO 2 are deposited on the substrate, and then the pigment is separated off, washed, dried and calcined at temperatures of about 500° C. or more.
Claim 8
Dependent Claim
26 words
The process of claim 6, wherein the ratio of SiO 2 to B 2 O 3 in the metal oxide layer is from 0.1:1 to 10:1.
Claim 9
Dependent Claim
34 words
A process for producing a pigment of claim 1, comprising calcining a substrate having deposited thereon a metal oxide or metal oxide mixture, a borate or B 2 O 3 and SiO 2 .
Claim 10
Dependent Claim
22 words
The process of claim 6, according to part a), wherein the alkali or alkaline earth metal salt is a chloride or nitrate.
Claim 11
Dependent Claim
21 words
The process of claim 6, wherein the boron-oxygen compound is an alkali metal borate or boric acid salt of a polyacid.
Claim 12
Dependent Claim
19 words
The process of claim 6, according to part b), wherein the water-soluble silicon compound is an alkali metal silicate.
Claim 13
Dependent Claim
19 words
A method for inhibiting yellowing in plastics and plastics systems comprising incorporating therein a pigment according to claim 1.
Claim 14
Dependent Claim
14 words
A coating, coloring, plastic or cosmetic formulation comprising a pigment according to claim 1.
References Cited (Backward Citations)
No citation records indexed.
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