Patent US3847640A successfully refreshed from Google Patents.
US3847640A
Expired / Lapsed
US
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Titanium pigment slurries for preparation of latex-base coating compositions
Assignee: A L Industries Inc
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Filing: 1973-03-26
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Granted: 1974-11-12
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Expires: 1993-03-26
Abstract
Abstract An aqueous titanium dioxide slurry is prepared by adding a titanium dioxide pigment having relatively high oil absorption characteristics to water in an amount to provide a pigment concentration within the range of above 60 to no more than about 65% on a slurry weight basis, and in the presence of a dispersing agent.
Inventors
- 👤 J Daubenspeck
- 👤 B Jett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:59
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/004; C09D17/007; C09D17/008
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
AN AQUEOUS TITANIUM DIOXIDE PIGMENT SLURRY HAVING A SOLIDS CONTENT FROM 60 TO 65 PERCENT ON A SLURRY WEIGHT BASIS, SAID SLURRY BEING ADAPTABLE FOR USE IN LATEX PAINTS AND COMPRISING A DISPERSING AGENT IN AN AMOUNT FROM 0.2 TO 0.7 PERCENT ON PIGMENT WEIGHT BASIS AND A TITANIUM DIOXIDE PIGMENT, SAID PIGMENT IN SAID SLURRY HAVING A POST TREATMENT COATING CONSISTING OF FROM 5 TO 8 PERCENT HYDROUS SILICON OXIDE, FROM 3 TO 5.2 PERCENT HYDROUS ALUMINUM OXIDE AND FROM 0 TO 2 PERCENT HYDROUS TITANIUM OXIDE, THEREBY PRODUCING A COATED TITANIUM DIOXIDE PIGMENT HAVING AN OIL ABSORPTION OF FROM 36 TO AS HIGH AS 46.
Claim 2
Dependent Claim
107 words
AN AQUEOUS TITANIUM DIOXIDE PIGMENT SLURRY HAVING A SOLIDS CONTENT FROM 60 TO 65 PERCENT ON A SLURRY WEIGHT BASIS, SAID SLURRY BEING ADAPTABLE FOR USE IN LATEX PAINTS AND COMPRISING A DISPERSING AGENT IN AN AMOUNT FROM 0.2 TO 0.7 PERCENT ON PIGMENT WEIGHT BASIS AND A TITANIUM DIOXIDE PIGMENT, SAID PIGMENT IN SAID SLURRY HAVING A POST TREATMENT COATING CONSISTING OF FROM 5 TO 8 PERCENT HYDROUS SILICON OXIDE, FROM 3 TO 5.2 PERCENT HYDROUS ALUMINUM OXIDE AND FROM 0 TO 2 PERCENT HYDROUS TITANIUM OXIDE, THEREBY PRODUCING A COATED TITANIUM DIOXIDE PIGMENT HAVING AN OIL ABSORPTION OF FROM 36 TO AS HIGH AS 46.
Claim 3
Dependent Claim
16 words
An aqueous titanium dioxide pigment slurry according to claim 1 wherein said dispersant is potassium tripolyphosphate.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |