US3909286A
Expired / Lapsed
US
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Modified, precipitated alumino silicate pigments
Assignee: JM Huber Corp
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Filing: 1974-03-18
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Granted: 1975-09-30
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Expires: 1994-03-18
Abstract
Abstract Novel alkali aluminum silicate particulates, modified with and containing a chemically bound alkaline earth metal, are disclosed. The alumino silicate pigments contain an alkaline earth metal, preferably calcium or magnesium, in addition to an alkali metal, such as sodium. In chemical composition, the pigments contain oxides of the alkaline earth metal, the alkali metal, aluminum and silicon and are distinguishable from coprecipitates. The pigments are prepared by introducing dilute solutions of an alkali silicate and an aluminum salt of a mineral acid into an agitated aqueous receiving medium containing an alkaline earth salt or hydroxide. The pH of the fluid reaction medium may be controlled to form finely divided precipitated particulates having improved properties and which may be used as pigments in paper, paint, rubber, inks, plastics, and the like.
Inventors
- 👤 Robert C Fitton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:04
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; B; B82; B82Y; B82Y30/00; C01B33/26; C01B33/40; C01B33/46; C09; C09C; C09C1/00; C09C1/40; C09C1/405; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/11; C01P2006/12; C01P2006/19; C01P2006/60; C01P2006/80; C01P2006/82; C01P2006/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A FINELY DIVIDED, PRECIPITATED, WHITE POWDERY COMPOSITION COMPRISING CHEMICALLY BOUND OXIDE OF MAGNESIUM, SODIUM, ALUMINUM, AND SILICON IN A UNOFROM MATRIX SUBSTANTIALLY ALL OF THE PARTICLES OF WHICH ARE LESS THAN 1 MICRON IN DIAMETER, THE MOLAR RATIO OF SIO2 TO NA2O BEING AT LEAST ABOUT 4 TO 1 AND THE MOLAR RATIO OF NA2O TO AL2O3 BEING ABOUT 0.8 TO 14:1, SAID MAGNESIUM OXIDE BEING PRESENT IN AN AMOUNT OF FROM ABOUT 0.1 TO 8 PERCENT BASED ON THE DRY WEIGHT OF THE COMPOSITION, SAID COMPOSITION HAVING A SPECIFIC GAVITY OF 2.3 TO 2.4, SAID COMPOSITION FURTHER HAVING AN ALKALINITY IN THE RANGE OF FROM ABOUT 40-60 MEG/100 G, A LOI IN THE RANGE OF FROM ABOUT 6-8.5% BY WEIGHT, AN OIL ABSORPTION IN THE RANGE OF FROM ABOUT 110 TO 145 CC/100 G AND A SURFACE AREA IN THE RANGE OF FROM ABOUT 50 TO 120 M2/G.
Claim 2
Dependent Claim
149 words
A FINELY DIVIDED, PRECIPITATED, WHITE POWDERY COMPOSITION COMPRISING CHEMICALLY BOUND OXIDE OF MAGNESIUM, SODIUM, ALUMINUM, AND SILICON IN A UNOFROM MATRIX SUBSTANTIALLY ALL OF THE PARTICLES OF WHICH ARE LESS THAN 1 MICRON IN DIAMETER, THE MOLAR RATIO OF SIO2 TO NA2O BEING AT LEAST ABOUT 4 TO 1 AND THE MOLAR RATIO OF NA2O TO AL2O3 BEING ABOUT 0.8 TO 14:1, SAID MAGNESIUM OXIDE BEING PRESENT IN AN AMOUNT OF FROM ABOUT 0.1 TO 8 PERCENT BASED ON THE DRY WEIGHT OF THE COMPOSITION, SAID COMPOSITION HAVING A SPECIFIC GAVITY OF 2.3 TO 2.4, SAID COMPOSITION FURTHER HAVING AN ALKALINITY IN THE RANGE OF FROM ABOUT 40-60 MEG/100 G, A LOI IN THE RANGE OF FROM ABOUT 6-8.5% BY WEIGHT, AN OIL ABSORPTION IN THE RANGE OF FROM ABOUT 110 TO 145 CC/100 G AND A SURFACE AREA IN THE RANGE OF FROM ABOUT 50 TO 120 M2/G.
Claim 3
Dependent Claim
147 words
A finely divided precipitated, white powdery composition comprising chemically bound oxides of calcium, sodium, aluminum, and silicon in a uniform matrix substantially all of the particles of which are less tHan 1 micron in diameter, the molar ratio of SiO2 to Na2O being at least about 4 to 1 and the molar ratio of Na2O to Al2O3 being from about 0.8 to 1.4:1, said calcium being present in an amount of from about 0.1 to 8 percent based on the dry weight of the composition having a specific gravity of 2.0 to 2.4; said composition further having an alkalinity in the range of from about 40-60 meg/100 g; a LOI in the range of from about 6-8.5% by weight; an oil absorption in the range of from about 110 to 145 cc/100 g and a surface area in the range of from about 50 to 120 M2/g.
Claim 4
Dependent Claim
147 words
A finely divided precipitated, white powdery composition comprising chemically bound oxides of calcium, sodium, aluminum, and silicon in a uniform matrix substantially all of the particles of which are less tHan 1 micron in diameter, the molar ratio of SiO2 to Na2O being at least about 4 to 1 and the molar ratio of Na2O to Al2O3 being from about 0.8 to 1.4:1, said calcium being present in an amount of from about 0.1 to 8 percent based on the dry weight of the composition having a specific gravity of 2.0 to 2.4; said composition further having an alkalinity in the range of from about 40-60 meg/100 g; a LOI in the range of from about 6-8.5% by weight; an oil absorption in the range of from about 110 to 145 cc/100 g and a surface area in the range of from about 50 to 120 M2/g.
Claim 5
Dependent Claim
145 words
A finely divided, precipitated, white powdery composition comprising chemically bound oxides of barium, sodium, aluminum, and silicon in a uniform matrix substantially all of the particles of which are less than 1 micron in diameter, the molar ratio of SiO2 to Na2O being at least about 4 to 1 and the molar ratio of Na2O to Al2O3 being from about 0.8 to 1.4:1, said barium being present in an amount of from about 0.1 to 8 percent based on the dry weight of the composition having a specific gravity of 2.0 to 2.4; said composition further having an alkalinity in the range of from about 40-60 meg/100g; a LOI in the range of from about 6-8.5% by weight; an oil absorption in the range of from about 110 to 145 cc/100g and a surface area in the range of from about 50 to 120 M2/g.
Claim 6
Dependent Claim
145 words
A finely divided, precipitated, white powdery composition comprising chemically bound oxides of barium, sodium, aluminum, and silicon in a uniform matrix substantially all of the particles of which are less than 1 micron in diameter, the molar ratio of SiO2 to Na2O being at least about 4 to 1 and the molar ratio of Na2O to Al2O3 being from about 0.8 to 1.4:1, said barium being present in an amount of from about 0.1 to 8 percent based on the dry weight of the composition having a specific gravity of 2.0 to 2.4; said composition further having an alkalinity in the range of from about 40-60 meg/100g; a LOI in the range of from about 6-8.5% by weight; an oil absorption in the range of from about 110 to 145 cc/100g and a surface area in the range of from about 50 to 120 M2/g.
Claim 7
Dependent Claim
30 words
The composition in accordance with claim 1, said composition further comprising the oxides of magnesium, sodium, aluminum, and silicon precipitated in intimate association with finely divided particles of pre-precipitated silica.
Claim 8
Dependent Claim
30 words
The composition in accordance with claim 2, said composition further comprising the oxides of calcium, sodium, aluminum, and silicon precipitated in intimate association with finely divided particles of pre-precipitated silica.
Claim 9
Dependent Claim
30 words
The composition in accordance with claim 3, said composition further comprising the oxides of barium, sodium, aluminum, and silicon precipitated in intimate association with finely divided particles of pre-precipitated silica.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |