US4968351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nacreous pigments colored by adsorbed dyes
Assignee: BASF Catalysts LLC
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Filing: 1988-11-02
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Granted: 1990-11-06
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Expires: 2008-11-02
Abstract
Abstract Non-bleeding, non-agglomerated, lustrous colored nacreous pigments are prepared by admixing a laking reagent with an aqueous dispersion of a metal oxide coated substrate nacreous pigment and dyestuff.
Inventors
- 👤 Wasi Ahmed
- 👤 Louis Armanini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/62; C09C1/0015; C09C1/0021; C09D; C09D5/00; C09D5/36; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/60; C09C2200/00; C09C2200/30; C09C2200/301; C09C2200/302
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
43 words
A method of producing an adsorbed dye colored nacreous pigment which comprises absorbing a soluble organic dyestuff at a coating pH on the surface of a metal oxide coated substrate nacreous pigment in an aqueous dispersion and subsequently absorbing a laking reagent thereon.
Claim 2
Independent Claim
43 words
A method of producing an adsorbed dye colored nacreous pigment which comprises absorbing a soluble organic dyestuff at a coating pH on the surface of a metal oxide coated substrate nacreous pigment in an aqueous dispersion and subsequently absorbing a laking reagent thereon.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein the nacreous pigment concentration in said dispersion is about 20-30% by weight.
Claim 4
Dependent Claim
28 words
The method of claim 2, wherein the laking reagent is an aluminum, zirconium, calcium, barium or strontium laking reagent and the coating pH is about 4.5 to 7.
Claim 5
Dependent Claim
12 words
The method of claim 3, wherein the coating pH is about 5.
Claim 6
Dependent Claim
14 words
The method of claim 2, wherein the admixture is effected at about room temperature.
Claim 7
Dependent Claim
21 words
The method of claim 2, wherein said aqueous dispersion contains about 0.5-6% of dyestuff based on the weight of said pigment.
Claim 8
Dependent Claim
60 words
The method of claim 2, wherein said laking reagent is a hydrolyzable aluminum compound which is added to said aqueous dispersion over a finite period of time, the initial rate of addition being sufficient to adjust the pH to a coating pH of about 4.5-7 and thereafter the rate is sufficient to maintain the pH at about said coating pH.
Claim 9
Dependent Claim
28 words
The method of claim 7, wherein the laking reagent is aluminum chloride and the initial rate of introduction thereof is maintained until the coating pH is about 5.
Claim 10
Dependent Claim
21 words
The method of claim 2, wherein the laking reagent is a zirconium laking reagent and the coating pH is about 3-4.5.
Claim 11
Dependent Claim
17 words
The method of claim 2, wherein the colors of said nacreous pigment and said dyestuff are different.
Claim 12
Dependent Claim
39 words
The method of claim 10, wherein said laking reagent is an aluminum, zirconium, calcium, barium or strontium laking reagent, the coating pH is about 5-7 and said dispersion contains about 1-5% dyestuff based on the weight of said pigment.
Claim 13
Dependent Claim
37 words
A non-bleeding, non-agglomerated, cosmetic grade lustrous colored nacreous pigment comprising metal oxide coated substrate nacreous pigment particles whose surface has a uniformly distributed adsorbed soluble organic dyestuff, said dyestuff having fixed on its surface a dyestuff lake.
Claim 14
Dependent Claim
37 words
A non-bleeding, non-agglomerated, cosmetic grade lustrous colored nacreous pigment comprising metal oxide coated substrate nacreous pigment particles whose surface has a uniformly distributed adsorbed soluble organic dyestuff, said dyestuff having fixed on its surface a dyestuff lake.
Claim 15
Dependent Claim
19 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 12, wherein said nacreous pigment is titanium dioxide coated mica.
Claim 16
Dependent Claim
23 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 13, wherein said dyestuff lake is an aluminum, calcium, barium, strontium or zirconium lake.
Claim 17
Dependent Claim
23 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 14, wherein said dyestuff is about 0.5-6% based on the weight of said pigment.
Claim 18
Dependent Claim
17 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 15, wherein said dyestuff lake comprises aluminum hydroxide.
Claim 19
Dependent Claim
21 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 16, wherein said nacreous pigment and said dyestuff are of different color.
Claim 20
Dependent Claim
23 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 17, wherein said dyestuff is about 1-5% based on the weight of said pigment.
Claim 21
Dependent Claim
47 words
The non-bleeding, non-agglomerated, lustrous colored nacreous pigment of claim 13, wherein said dyestuff is selected from the group consisting of DC Red 6, DC Green 5, FDC Yellow 5, FDC Yellow 6, FDC Blue 1 and FDC Red 40 and wherein said dyestuff lake comprises aluminum hydroxide.
Claim 22
Dependent Claim
55 words
The method of claim 1, wherein said dyestuff is selected from the group consisting of DC Red 6, DC Green 5, FDC Yellow 5, FDC Yellow 6, FDC Blue 1 and FDC Red 40, wherein said dyestuff lake comprises aluminum hydroxide and wherein said metal oxide coated substrate nacreous pigment is titanium dioxide coated mica.
References Cited (Backward Citations)
US4084983A
Cited
US4086100A
Cited
US4128435A
Cited
US4323554A
Cited
US4309480A
Cited
US4755229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |