US4323554A
Expired / Lapsed
US
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Preparation and use of improved pearlescent pigments of high light fastness
Assignee: Merck Patent GmbH
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Filing: 1980-07-11
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Granted: 1982-04-06
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Expires: 2000-07-11
Abstract
Abstract Colored material-containing pearlescent pigments based on mica flakes coated with metal oxide contain as colored material, a colored aluminum lake which is fixed as a water-insoluble compound on the surface of the pigment particles, the lake being formed from a precipitated aluminum hydroxide layer, wherein the aluminum hydroxide layer forming the colored lake contains 1 to 50% by weight of a compound of the formula ##STR1## wherein X is hydroxy or carboxy, Y is hydrogen or alkyl or alkenyl of 10 to 20 carbon atoms and Z is hydrogen, or alkyl or alkenyl of 10 to 20 carbon atoms, or the grouping ##STR2## said compound having a molecular weight of at least 150 and a solubility in water at a pH of 5-9 of at least 0.05 g/l, and said compound being precipitated onto the flakes together with the aluminum hydroxide layer. A process for the production of these pigments is also provided, as are cosmetics containing them.
Inventors
- 👤 Horst Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:10
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/80; C01P2004/82; C01P2004/84; C09C2200/00; C09C2200/10; C09C2200/102; C09C2200/40; C09C2200/401; C09C2200/402; C09C2200/403; C09C2200/404; C09C2220/00; C09C2220/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
A colored material-containing pearlescent pigment comprising mica flakes coated with a metal oxide, the colored material being a colored aluminum lake which is fixed as a water-insoluble compound on the surface of the pigment particles, the lake being formed by a precipitated aluminum hydroxide layer, wherein the aluminum hydroxide layer forming the colored lake contains an amount in the range of 1 to 50% by weight, sufficient to increase the light fastness of said pigment, of a compound of the formula ##STR5## wherein X is hydroxy or carboxy; Y is hyrdrogen, or alkyl or alkenyl of 10 to 20 carbon atoms; and Z is hydrogen, alkyl or alkenyl of 10 to 20 carbon atoms, or the grouping ##STR6## the compound having a molecular weight of at least 150 and a solubility in water at a pH of 5-9 of at least 0.05 g/l, and the compound being precipitated onto the metal oxide coated mica flakes together with the aluminum hydroxide layer.
Claim 2
Dependent Claim
161 words
A colored material-containing pearlescent pigment comprising mica flakes coated with a metal oxide, the colored material being a colored aluminum lake which is fixed as a water-insoluble compound on the surface of the pigment particles, the lake being formed by a precipitated aluminum hydroxide layer, wherein the aluminum hydroxide layer forming the colored lake contains an amount in the range of 1 to 50% by weight, sufficient to increase the light fastness of said pigment, of a compound of the formula ##STR5## wherein X is hydroxy or carboxy; Y is hyrdrogen, or alkyl or alkenyl of 10 to 20 carbon atoms; and Z is hydrogen, alkyl or alkenyl of 10 to 20 carbon atoms, or the grouping ##STR6## the compound having a molecular weight of at least 150 and a solubility in water at a pH of 5-9 of at least 0.05 g/l, and the compound being precipitated onto the metal oxide coated mica flakes together with the aluminum hydroxide layer.
Claim 3
Dependent Claim
26 words
A pigment of claim 1 wherein the light fastness increasing compound is sorbitol, oleic acid, stearic acid, palmitic acid, linolic acid, polyvinyl alcohol or polyacrylic acid.
Claim 4
Dependent Claim
15 words
A pigment of claim 1 containing 5-30% by weight of the light fastness increasing compound.
Claim 5
Dependent Claim
19 words
A pigment of claim 1 wherein the aluminum hydroxide layer contains 3 to 20% by weight of polyvinyl alcohol.
Claim 6
Dependent Claim
40 words
A pigment of claim 1 or 4, wherein the ratio of the number of groups X originating from the compound of said formula, to the number of molecules of Al(OH) 3 in the aluminum hydroxide layer is 1:2 to 1:10.
Claim 7
Dependent Claim
127 words
A process for producing the colored material-containing pearlescent pigment of claim 1 comprising precipitating an aluminum hydroxide layer onto mica flakes coated with metal oxide, and subsequently or simultaneously reacting the flakes with a solution of an hydroxy group-containing compound which, directly or with the intermediate formation of a sparingly soluble aluminum chelate followed by subsequent reaction thereof with a diazotized amine, is able to form a water-insoluble colored aluminum lake, wherein the precipitation of the aluminum hydroxide layer forming the colored lake takes place in the presence of such an amount of a compound of the formula recited in claim 1 that this compound is incorporated into the aluminum hydroxide layer in an amount of from 1 to 50% by weight, referred to Al(OH) 3 .
Claim 8
Dependent Claim
12 words
A colored material-containing pearlescent pigment, produced by the process of claim 6.
Claim 9
Dependent Claim
30 words
A colored composition containing an amount of the pigment of claim 1 sufficient to alter the appearance of the composition, and a base ingredient which is different from said pigment.
Claim 10
Dependent Claim
25 words
A cosmetic composition containing an amount of the pigment of claim 1 sufficient to alter the appearance of the composition and a cosmetically acceptable carrier.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |