Patent US4885032A successfully refreshed from Google Patents.
US4885032A
Expired / Lapsed
US
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Aluminum flake pigment
Assignee: Nippon Paint Co Ltd
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Filing: 1987-08-31
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Granted: 1989-12-05
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Expires: 2007-08-31
Abstract
Abstract Disclosed is a metal particle having a maximum dimension of not more than 1 mm surface-treated with an aqueous solution containing phosphate ions, soluble ions of vanadium and oxygen. This particle can be a metallic pigment having excellent brightness retention and wetting properties to a binder resin.
Inventors
- 👤 Toshihiro Okai
- 👤 Yoshiaki Okumura
- 👤 Mitsuyuki Oda
- 👤 Takashi Yamamoto
- 👤 Teruaki Kuwajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:00
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/62; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; C09C1/64; C09C1/642; C09C3/00; C09C3/06; C09C3/063; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/40; C23C22/42; C23C22/68; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
An aluminum flake pigment for metallic paint of a maximum dimension of not more than 1 mm having excellent brightness retention and resistance to corrosion, which is coated with a film resulting from an aqueous solution containing phosphate ions, soluble ions of vanadium and oxygen such as to render the aluminum flakes resistant to corrosion, said aqueous solution containing 0.001 to 0.1 mole/liter of the phosphate ions, 0.001 to 0.1 mole/liter of the soluble ions of vanadium and having a pH of 5 to 9.
Claim 2
Dependent Claim
85 words
An aluminum flake pigment for metallic paint of a maximum dimension of not more than 1 mm having excellent brightness retention and resistance to corrosion, which is coated with a film resulting from an aqueous solution containing phosphate ions, soluble ions of vanadium and oxygen such as to render the aluminum flakes resistant to corrosion, said aqueous solution containing 0.001 to 0.1 mole/liter of the phosphate ions, 0.001 to 0.1 mole/liter of the soluble ions of vanadium and having a pH of 5 to 9.
Claim 3
Dependent Claim
47 words
The aluminum flake pigment according to claim 1 wherein said aluminum flake pigment was prepared by spraying said aqueous solution onto aluminum flakes, or immersing the aluminum flakes in said aqueous solution, with the proviso that said aluminum flakes have not been treated with an alkaline solution.
Claim 4
Dependent Claim
34 words
The aluminum flake pigment according to claim 1 which has been treated with said aqueous solution at a temperature and time sufficient to produce a corrosion resistant film on the surface of aluminum flakes.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |