Patent US3716389A successfully refreshed from Google Patents.
US3716389A
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US
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Pigment composition and its use in electrodeposition
Assignee: PPG Industries Inc
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Filing: 1971-02-02
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Granted: 1973-02-13
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Expires: 1991-02-02
Abstract
Abstract When a mixture of dissimilar pigments are employed in an aqueous composition, for example, an electrodeposition bath, pigment separation is frequently noted. It has now been found that by preparing two aqueous pigment portions such as (A) a pigment, an anion-active agent, and a soluble silicate; and (B) a pigment, a cation-active agent, and a soluble metal salt capable of forming an insoluble silicate and then mixing (A) and (B), thereafter forming a convention pigment, this problem is reduced or eliminated. The pigments prepared in this manner may be used as pigments in electrodepositable compositions.
Inventors
- 👤 D Voskuil
- 👤 J Knudtson
- 👤 M Krupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:53
CPC Classifications
C; C09; C09C; C09C1/00; C09D; C09D5/00; C09D5/44; C09D5/448; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A method of preparing a mixed pigment composition, said composition containing at least two distinct pigments, comprising the steps: A. admixing a first pigment portion with an anion-active material and a water-soluble silicate; B. admixing a second pigment portion with a cation-active material and water-soluble metal salt capable of forming a water-insoluble silicate with the silicate of (A); and C. admixing portions (A) and (B), thereby forming a pigment mixture having reduced pigment separation.
Claim 2
Independent Claim
74 words
A method of preparing a mixed pigment composition, said composition containing at least two distinct pigments, comprising the steps: A. admixing a first pigment portion with an anion-active material and a water-soluble silicate; B. admixing a second pigment portion with a cation-active material and water-soluble metal salt capable of forming a water-insoluble silicate with the silicate of (A); and C. admixing portions (A) and (B), thereby forming a pigment mixture having reduced pigment separation.
Claim 3
Dependent Claim
21 words
A method as in claim 1 wherein at least one portion of (A) and (B) contains at least two distinct pigments.
Claim 4
Dependent Claim
14 words
A method as in claim 1 wherein portion (A) is added to portion (B).
Claim 5
Dependent Claim
22 words
A method as in claim 1 wherein the water-soluble metal salt and the water-soluble silicate are present in approximately chemically equivalent amounts.
Claim 6
Dependent Claim
102 words
A method as in claim 1 wherein in portion (A) the anion-active material is present in an amount between about 0.1 and about 25 percent by weight of the dry pigment and the water-soluble metal salt is present in an amount between about 0.5 and about 10 percent by weight of the dry pigment; and wherein in portion (B) the cation-active material is present in an amount between about 0.1 and about 25 percent by weight of the dry pigment and the water-soluble silicate is present in an amount between about 0.5 and about 10 percent by weight of the dry pigment.
Claim 7
Dependent Claim
102 words
A method as in claim 1 wherein in portion (A) the anion-active material is present in an amount between about 1 and about 10 percent by weight of the dry pigment and the water-soluble metal salt is present in an amount between about 1 and about 5 percent by weight of the dry pigment; and wherein in portion (B) the cation-active material is present in an amount between about 1 and about 10 percent by weight of the dry pigment and the water-soluble silicate is present in an amount between about 1 and about 5 percent by weight of the dry pigment.
Claim 8
Dependent Claim
63 words
A method as in claim 1 wherein the anion-active material is an alkali metal salt of an organic acid containing at least 10 carbon atoms and the cation-active material is selected from the group consisting of water-soluble amines, salts of amines, hydroxyamine derivatives, quaternary ammonium compounds, sulfonium compounds, and phosphonium compounds having an open chain aliphatic group of at least eight carbon atoms.
Claim 9
Dependent Claim
23 words
A method as in claim 1 wherein the silicate is an alkali metal silicate and the metal salt is a water-soluble aluminum salt.
Claim 10
Dependent Claim
17 words
A method as in claim 1 wHerein the pigments comprise a mixture of white and black pigments.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |