US3864140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmentary compositions with reduced water absorption
Assignee: Individual
•
Filing: 1973-08-22
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Granted: 1975-02-04
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Expires: 1993-08-22
Abstract
Abstract Comminuted minerals are combined with inorganic binders and formed into agglomerates which, when calcined to bond the particles one to another, contain internal voids and surfaces of minor porosity. The resulting pigmentary compositions are then treated with a class of surface modifying agents to further reduce the surface porosity as measured by water absorption.
Inventors
- 👤 Thomas Howard Ferrigno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:37
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/60; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
41 words
A pigmentary composition as defined in claim 1 wherein said silicate mineral is an anhydrous silicate selected from the group consisting of silica; berylium, magnesium and calcium silicates; alumino-silicate; lithium, berylium, barium, sodium, magnesium, calcium and potassium alumino-silicates, and mixtures thereof.
Claim 2
Dependent Claim
41 words
A pigmentary composition as defined in claim 2 wherein said silicate mineral also includes hydrous silicate mineral selected from the group consisting of phyllosilicates, sorosilicates, opal and the zeolite group of tectosilicates, the amphibole group of inosilicates, perlite and mixtures thereof.
Claim 3
Dependent Claim
20 words
A pigmentary composition as defined in claim 1 wherein said agglomerates have a composition in parts by weight as follows:
Claim 4
Dependent Claim
26 words
A composition as defined in claim 1 wherein the amount of the silane present equals from about 0.05 to 1% of the weight of the agglomerate.
Claim 5
Dependent Claim
14 words
A pigmentary composition as defined in claim 4 wherein said silicate mineral is feldspar.
Claim 6
Dependent Claim
17 words
A composition as defined in claim 1 wherein the water absorption of the agglomerate is about zero.
Claim 7
Dependent Claim
38 words
The composition of claim 1, wherein the pigmentary composition has a water absorption of between 10% and greater than 0% by weight before and less than the original value after deposition on the surface thereof of an organo-silane.
Claim 8
Dependent Claim
21 words
A composition as defined in claim 1, wherein the silane on the surface of the agglomerate is deposited from a vapor.
Claim 9
Dependent Claim
29 words
A pigmentary composition as defined in claim 4 wherein said inorganic binder is selected from the group consisting of expanding lattice montmorillonites, sodium polyphosphates and soluble alkali metal silicates.
Claim 10
Dependent Claim
26 words
The composition of claim 1, wherein the silane is selected from the group consisting of tetraalkoxysilanes, alkylalkoxysilanes, alkenylalkoxysilanes, arylalkoxysilanes, tetrachlorosilane, alkylchlorosilanes, alkenychlorosilanes, arylchlorosilanes, and mixtures thereof.
Claim 11
Dependent Claim
57 words
The composition of claim 1, wherein the pigmentary composition has a water absorption of greater than 10% by weight before and less than 10% by weight after deposition thereon of from about 0.005% to about 1% by weight of the pigmentary composition of an organo-silane selected from the group consisting of tetralkoxysilanes, alkylalkoxysilanes, alkenylalkoxysilanes, and mixtures thereof.
Claim 12
Dependent Claim
60 words
The composition of claim 1, wherein the pigmentary composition has a water absorption of between 10% and greater than 0% by weight before and less than the original value after deposition thereon of from about 0.005% to about 1% by weight of the pigmentary composition of an organo-silane selected from the group consisting of tetraalkoxysilanes, alkylalkoxysilanes, alkenylalkoxysilanes, and mixtures thereof.
Claim 13
Independent Claim
84 words
The method of producing a pigmentary composition which comprises the steps of temporarily bonding a plurality of particles of silicate mineral together with an inorganic bonding agent in the presence of water to form agglomerated bodies, drying the resulting agglomerates to provide removal of water therefrom and assure the presence of voids therein, calcining the agglomerates to permanently bond the particles of silicate mineral together, and thereafter depositing an organo-silane to the surface of the calcined agglomerates to reduce the water absorbing property thereof.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |