US5215579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water resistant metal pigment particles
Assignee: Silberline Manufacturing Co Inc
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Filing: 1991-12-26
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Granted: 1993-06-01
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Expires: 2011-12-26
Abstract
Abstract Metal pigment particles treated with an organic phosphate, phosphite or a pentavalent vanadium compound and a nitro-containing compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions.
Inventors
- 👤 Craig Keemer
- 👤 William G. Jenkins
- 👤 H. Taylor Lamborn
- 👤 Joseph B. Scheller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/004; C09D17/006; C09C; C09C1/00; C09C1/62; C09C3/00; C09C3/06; C09C3/063; C09C3/08; C09D5/00; C09D5/38; C01; C01P; C01P2006/00; C01P2006/90
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
75 words
A paste suitable for formation of a coating composition, comprising: metal pigment particles; a member selected from the group consisting of an organic phosphate, an organic phosphite and a pentavalent vanadium compound; and a solvent which comprises an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro a nitro functional group.
Claim 2
Dependent Claim
75 words
A paste suitable for formation of a coating composition, comprising: metal pigment particles; a member selected from the group consisting of an organic phosphate, an organic phosphite and a pentavalent vanadium compound; and a solvent which comprises an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro a nitro functional group.
Claim 3
Dependent Claim
16 words
The paste of claim 1, wherein the metal pigment particles are made of aluminum or zinc.
Claim 4
Dependent Claim
20 words
The paste of claim 1, wherein the metal pigment particles are present in an amount of about 60-72% by weight.
Claim 5
Dependent Claim
26 words
The paste of claim 1, wherein an organic phosphate is present in an amount of about 1 to 25% by weight of the metal pigment particles.
Claim 6
Dependent Claim
42 words
The paste of claim 1, wherein the solvent is present in an amount of about 28 to 40% by weight of the paste and the nitro-containing compound is present in an amount of about 5 to 100% by weight of the solvent.
Claim 7
Dependent Claim
23 words
The paste of claim 4, wherein the amount of organic phosphate is about 3 to 15% by weight of the metal pigment particles.
Claim 8
Dependent Claim
21 words
The paste of claim 5, wherein the amount of nitro-containing compound is about 20 to 100% by weight of the solvent.
Claim 9
Dependent Claim
21 words
The paste of claim 7, wherein the amount of nitro-containing compound is about 35 to 100% by weight of the solvent.
Claim 10
Dependent Claim
27 words
The paste of claim 1, wherein a pentavalent vanadium compound is present in an amount of about 1 to 30% by weight of the metal pigment particles.
Claim 11
Dependent Claim
18 words
An aqueous coating composition comprising: a metal pigment-containing paste as claimed in claim 1; and an aqueous carrier.
Claim 12
Dependent Claim
25 words
The paste of claim 9, wherein the amount of the pentavalent vanadium compound is about 5 to 15% by weight of the metal pigment particles.
Claim 13
Dependent Claim
26 words
The paste of claim 1, wherein an organic phosphite is present in an amount of about 2 to 15% by weight of the metal pigment particles.
Claim 14
Dependent Claim
24 words
The paste of claim 12, wherein the amount of the organic phosphite is about 5 to 10% by weight of the metal pigment particles.
Claim 15
Independent Claim
82 words
A method of making a metal pigment paste useful for forming a coating composition, comprising: producing metal pigment particles; and treating the pigment particles with (a) an organic phosphate, (b) an organic phosphite or (c) a pentavalent vanadium compound, and a solvent which comprises an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro a nitro functional group.
Claim 16
Independent Claim
82 words
A method of making a metal pigment paste useful for forming a coating composition, comprising: producing metal pigment particles; and treating the pigment particles with (a) an organic phosphate, (b) an organic phosphite or (c) a pentavalent vanadium compound, and a solvent which comprises an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro a nitro functional group.
Claim 17
Dependent Claim
29 words
The method of claim 14, wherein the pigment particles are treated with a treatment solution which comprises the organic phosphate, organic phosphite or pentavalent vanadium compound and the solvent.
Claim 18
Dependent Claim
25 words
The method of claim 14, wherein the pigment particles are first treated with the solvent and then treated with an organic phosphate or organic phosphite.
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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) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |