US3840359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrated alkali metal silicate flakes
Assignee: PQ Corp
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Filing: 1972-05-18
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Granted: 1974-10-08
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Expires: 1992-05-18
Abstract
Abstract I have discovered a new procedure for the manufacture of soluble silicate glasses with a high rate of solution and have evolved an improved dissolving procedure to take advantage of this new product. Finely divided soluble silicate glass particles are formed by first drawing a sheet of glass from a furnace and attenuating the sheet with a high pressure stream of water whereby there are formed a very large number of finely divided thin flaky iridescent pieces of silicate glass film hydrated to the extent of about 4% H2O or more. The solution is easily obtained by agitation of the hydrated glass particles in water at atmospheric pressure and temperatures required by the ratio and time factor.
Inventors
- 👤 F Lazet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:27
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
179 words
IN THE PROCESS FOR PRODUCING SOLUBLE GLASS IN FINE PARTICULATE FORM BY ATTENUATING A SHEET OF MOLTEN SILICATE GLASS COMPRISING THE STEPS OF PASSING A MOLTEN GLASS RIBBON ACROSS A NARROW NORIZONTAL SLIT-LIKE NOZZLE WITH A PRESSURIZED STREAM PASSING THROUGH SAID NOZZLE, THE IMPROVEMENT WHEREIN SAID MOLTEN GLASS IS A BINARY GLASS WHICH HAS A VISCOSITY OF 800 TO 1000 POISES, A RIBBON THICKNESS OF LESS THAN 0.25 INCH, AND A 1.5 TO 4.0:1.0 MOLE RATIO OF SIO2 TO ALKALI METAL OXIDE, AND UTILIZING WATER AT 100 TO 1600 PSIG PASSED THROUGH SAID NOZZLE AT A RATE OF 5-25 GALLONS PER MINITES AS THE FORCE T SIMULTANEOUSLY COOL, BREAK-UP AND HYDRATE SAID MOLTEN GLASS RESULTING IN IRIDESCENT FLAKE FORMATION, SAID FLAKES HAVING A THICKNESS OF 0.001 TO 0.00025 INCH, A DIAMETER OF 0.5 TO 0.02 INCH AND BEING HYDRATED TO AT LEAST 4 AND UP TO 25 PERCENT ON A WEIGHT BASIS, THE PERCENT OF HYDRATION BEING CONTROLLED BY THE WATER INTRODUCED THROUGH THE NOZZLE, ESSENTIALLY ALL OF SAID WATER BEING COMBINED WITH SAID FLAKES AS WATER OF HYDRATION.
Claim 2
Dependent Claim
179 words
IN THE PROCESS FOR PRODUCING SOLUBLE GLASS IN FINE PARTICULATE FORM BY ATTENUATING A SHEET OF MOLTEN SILICATE GLASS COMPRISING THE STEPS OF PASSING A MOLTEN GLASS RIBBON ACROSS A NARROW NORIZONTAL SLIT-LIKE NOZZLE WITH A PRESSURIZED STREAM PASSING THROUGH SAID NOZZLE, THE IMPROVEMENT WHEREIN SAID MOLTEN GLASS IS A BINARY GLASS WHICH HAS A VISCOSITY OF 800 TO 1000 POISES, A RIBBON THICKNESS OF LESS THAN 0.25 INCH, AND A 1.5 TO 4.0:1.0 MOLE RATIO OF SIO2 TO ALKALI METAL OXIDE, AND UTILIZING WATER AT 100 TO 1600 PSIG PASSED THROUGH SAID NOZZLE AT A RATE OF 5-25 GALLONS PER MINITES AS THE FORCE T SIMULTANEOUSLY COOL, BREAK-UP AND HYDRATE SAID MOLTEN GLASS RESULTING IN IRIDESCENT FLAKE FORMATION, SAID FLAKES HAVING A THICKNESS OF 0.001 TO 0.00025 INCH, A DIAMETER OF 0.5 TO 0.02 INCH AND BEING HYDRATED TO AT LEAST 4 AND UP TO 25 PERCENT ON A WEIGHT BASIS, THE PERCENT OF HYDRATION BEING CONTROLLED BY THE WATER INTRODUCED THROUGH THE NOZZLE, ESSENTIALLY ALL OF SAID WATER BEING COMBINED WITH SAID FLAKES AS WATER OF HYDRATION.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said jet of water is at a pressure of 100 to 1000 psig.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the viscosity of said molten glass ribbon is between 850 and 950 Poises.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the resultant flakes are hydrated to a water content of 4 to 10 percent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |