US4603047A
Expired / Lapsed
US
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Flaky pigments, process for their preparation
Assignee: Merck Patent GmbH
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Filing: 1984-10-22
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Granted: 1986-07-29
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Expires: 2004-10-22
Abstract
Abstract Flaky pigments, in which a flaky substrate, such as in particular mica, talc or kaolin, are provided with a firmly adhering coating of barium sulphate, if appropriate together with a metal oxide, hydrated metal oxide or metal carbonate, are advantageously used in cosmetics.
Inventors
- 👤 Takaji Watanabe
- 👤 Tamio Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/0015; C09C1/0021; C09C1/02; C09C1/027; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/64; C09C2200/00; C09C2200/10; C09C2200/102; C09C2200/40; C09C2200/401; C09C2200/402; C09C2200/403; C09C2200/404; C09C2200/409; C09C2200/50; C09C2200/505; C09C2220/00; C09C2220/10; C09C2220/106
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
77 words
In a powdery cosmetic composition comprising a flaky pigment and at least one other compatible ingredient, the improvement wherein the flaky pigment comprises a flaky pigment substrate having a firmly adhering coating of precipitated barium sulfate, and a metal oxide, hydrated metal ozide or metal carbonate compatible with the end use of the pigment, the amount of barium sulfate being effective to improve the skin adhesion capacity or extension on the skin of the powdery cosmetic composition.
Claim 2
Dependent Claim
77 words
In a powdery cosmetic composition comprising a flaky pigment and at least one other compatible ingredient, the improvement wherein the flaky pigment comprises a flaky pigment substrate having a firmly adhering coating of precipitated barium sulfate, and a metal oxide, hydrated metal ozide or metal carbonate compatible with the end use of the pigment, the amount of barium sulfate being effective to improve the skin adhesion capacity or extension on the skin of the powdery cosmetic composition.
Claim 3
Dependent Claim
13 words
A composition of claim 1, wherein the substrate is mica, talc or kaolin.
Claim 4
Dependent Claim
15 words
A composition of claim 1 wherein the substrate has a particle size of 1-100 μm.
Claim 5
Dependent Claim
22 words
A composition of claim 1 wherein the amount of metal salt is about 1 to 2 moles per mole of barium salt.
Claim 6
Dependent Claim
23 words
A composition of claim 1 wherein the oxide, hydrated oxide or carbonate is of titanium, aluminum, zinc, magnesium, iron, chromium, manganese or cobalt.
Claim 7
Dependent Claim
10 words
A composition of claim 1 further comprising a compatible colorant.
Claim 8
Dependent Claim
26 words
In a facial powder comprising a flaky pigment and at least one other compatible ingredient, the improvement wherein the flaky pigment is that of claim 1.
Claim 9
Dependent Claim
67 words
A composition of claim 1, wherein the flaky pigment is prepared by treating an aqueous suspension of the flaky substrate with an aqueous solution containing barium ions and an aqueous solution containing sulfate ions, under conditions in which barium sulfate precipitates, simultaneously or after the precipitation of barium sulfate, also precipitating a metal oxide, hydrated metal oxide or metal carbonate, and then separating the resultant coated pigment.
Claim 10
Dependent Claim
14 words
A composition of claim 8, wherein the coated pigment is further dried and calcined.
Claim 11
Dependent Claim
44 words
A composition of claim 8, wherein the preparation of the flaky pigment further comprises, after the precipitation of barium sulfate, precipitating a metal oxide, hydrated metal oxide or metal carbonate, by addition of an aqueous base or an aqueous alkaline solution containing carbonate ions.
Claim 12
Dependent Claim
32 words
A composition of claim 8, wherein a metal salt of titanium, aluminum, zinc, magnesium, iron, chromium, manganese or cobalt is used for the preparation of the metal oxide, hydrated oxide or carbonate.
Claim 13
Dependent Claim
32 words
A composition of claim 10, wherein a metal salt of titanium, aluminum, zinc, magnesium, iron, chromium, manganese or cobalt is used for the precipitation of the metal oxide, hydrated oxide or carbonate.
Claim 14
Dependent Claim
25 words
A composition of claim 1, wherein in the preparation of the flaky pigment, the sulfate ions are used in stoichiometric excess over the barium ions.
Claim 15
Dependent Claim
16 words
A composition of claim 8, wherein said two aqueous solutions are added to the suspension simultaneously.
Claim 16
Dependent Claim
16 words
A composition of claim 8, wherein said two aqueous solutions are added to the suspension successively.
Claim 17
Dependent Claim
85 words
A nacreous flaky pigment, comprising a flaky pigment substrate having a firmly adhering coating of barium sulfate, the amount of the latter being effective to improve the skin adhesion capacity or extension on the skin of a cosmetic powder when the flaky pigment is used in the cosmetic powder, and wherein the flaky substrate is mica whose barium sulfate coating also comprises a metal oxide, hydrated metal oxide or metal carbonate compatible with the end use of the pigment, and which renders the pigment nacreous.
Claim 18
Dependent Claim
85 words
A nacreous flaky pigment, comprising a flaky pigment substrate having a firmly adhering coating of barium sulfate, the amount of the latter being effective to improve the skin adhesion capacity or extension on the skin of a cosmetic powder when the flaky pigment is used in the cosmetic powder, and wherein the flaky substrate is mica whose barium sulfate coating also comprises a metal oxide, hydrated metal oxide or metal carbonate compatible with the end use of the pigment, and which renders the pigment nacreous.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |