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US3607337A
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Process for the production of organically modified silicic acids and silicates
Assignee: DEUTCHE GOLD und SIBER SCHEIDE
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Filing: 1968-10-07
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Granted: 1971-09-21
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Expires: 1988-10-07
Abstract
Abstract A process for modifying silicic acids, gels, and silicates by impregnating them with a wax or a thermoplastic material, such as polyethylene. The silicic acids, silica gels, or silicates can be impregnated either as they are being formed or after they have formed by adding an aqueous emulsion or dispersion of wax or thermoplastic material to an aqueous suspension or dispersion of the silicic acids, gels or silicates. The mixture is then filtered, washed, dried, and finely ground. The organically modified silicic acids, gels, and silicates are useful as delustering agents in lacquer systems.
Inventors
- 👤 Edith Eisenmenger
- 👤 Otto Kuhnert
- 👤 Robert Kuhlmann
- 👤 Peter Nauroth
- 👤 Guenter Tuerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:41
CPC Classifications
C; C09; C09D; C09D167/00; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/152; C01B33/154; C01B33/18; C01B33/187; C01B33/193; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3072; C09C1/309; C09C3/00; C09C3/08; C09C3/10; C09D7/00; C09D7/40; C09D7/42; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/60; C01P2006/80; C01P2006/82; C01P2006/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
The process as defined in claim 1 wherein the impregnation step occurs simultaneously during the formation of the silicic acid, silica gel, or silicate precipitate.
Claim 2
Dependent Claim
34 words
The process as defined in claim 1 wherein the amount of said wax present on said silicic acid, silica gel, or silicate is from about 0.5 to less than 15 percent by weight thereof.
Claim 3
Dependent Claim
30 words
The process as defined in claim 3 wherein the amount of wax is from about 2 to about 10 percent by weight of said silicic acid, silica gel, or silicate.
Claim 4
Dependent Claim
24 words
The process as defined in claim 1 wherein the wax is selected from the group consisting of mineral waxes, animal waxes, and vegetable waxes.
Claim 5
Dependent Claim
13 words
The process as defined in claim 5 wherein the wax is paraffin wax.
Claim 6
Dependent Claim
23 words
The process as defined in claim 1 wherein the wax is selected from the group consisting of polyethylene, polyvinyl chloride, and polytetrafluorethylene waxes.
Claim 7
Dependent Claim
13 words
The process as defined in claim 7 wherein the wax is polyethylene wax.
Claim 8
Dependent Claim
26 words
The process as defined in claim 1 wherein said wax has a melting point of greater than 85* C. and a refractive index of about 1.50.
Claim 9
Dependent Claim
21 words
The process as defined in claim 1 wherein the precipitate is ground to a particle size of less than 10 microns.
Claim 10
Dependent Claim
64 words
The process as defined in claim 1 wherein a portion of the wax emulsion or dispersion required for impregnation is added during the formation of the silicic acid, silica gel, or silicate precipitate in the initial precipitation mix and the remainder of the wax emulsion or dispersion is added to the precipitate suspension after the silicic acid, silica gel, or silicate has completely precipitated.
Claim 11
Dependent Claim
39 words
Wax impregnated silicic acid, silica gel, or silicate granules wherein said wax is present in an amount of about 2 to about 10% by weight thereof and said granules are of a size of about 10 microns or less.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |