US4028085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing silicate glasses from alkoxides
Assignee: OI Glass Inc
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Filing: 1976-02-03
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Granted: 1977-06-07
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Expires: 1996-02-03
Abstract
Abstract A process is provided for producing carbon-free homogeneous silicate compositions comprising; Combining a hydrolyzable metal alkoxide with a clear solution of a partially hydrolyzed silicon tetraalkoxide so as to form a clear solution of a further hydrolyzable metallosiloxane; Adding an additional quantity of water to said solution in an amount in excess of that required to theoretically hydrolyze residual alkoxy groups of said further hydrolyzable metallosiloxane, thereby forming a substantially hydrolyzed metallosiloxane; Fractionally distilling said substantially hydrolyzed metallosiloxane, i.e. heating under a fractionating column, in the presence of free water for a time sufficient to remove all residual alcohol as distillate and hydrolyze residual alkoxy groups.
Inventors
- 👤 Ian M. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; Y; Y10; Y10S; Y10S65/00; Y10S65/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A process for producing a carbon-free homogeneous silicate glass comprising a. combining a hydrolyzable metal alkoxide with a clear solution of a partially hydrolyzed silicon tetraalkoxide so as to form a clear solution of a further hydrolyzable metallosiloxane; b. adding an additional quantity of water to said solution in an amount in excess of that required to theoretically hydrolyze residual alkoxy groups of said further hydrolyzable metallosiloxane, thereby forming a substantially hydrolyzed metallosiloxane; c. fractionally distilling said substantially hydrolyzed metallosiloxane in the presence of free water for a time sufficient to remove all residual alcohol and hydrolyze residual alkoxy groups; d. heating the residue of fractional distillation at a temperature and for a time sufficient to form a silicate glass.
Claim 2
Dependent Claim
120 words
A process for producing a carbon-free homogeneous silicate glass comprising a. combining a hydrolyzable metal alkoxide with a clear solution of a partially hydrolyzed silicon tetraalkoxide so as to form a clear solution of a further hydrolyzable metallosiloxane; b. adding an additional quantity of water to said solution in an amount in excess of that required to theoretically hydrolyze residual alkoxy groups of said further hydrolyzable metallosiloxane, thereby forming a substantially hydrolyzed metallosiloxane; c. fractionally distilling said substantially hydrolyzed metallosiloxane in the presence of free water for a time sufficient to remove all residual alcohol and hydrolyze residual alkoxy groups; d. heating the residue of fractional distillation at a temperature and for a time sufficient to form a silicate glass.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said silicon tetraalkoxide is silicon tethraethoxide.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said metal alkoxide is aluminum alkoxide.
Claim 5
Dependent Claim
89 words
In a process for forming a carbon free silicate glass comprising: forming a hydrolysis reaction product of water, a silicon tetraalkoxide and a metal alkoxide, said reaction product comprising alcohol and hydrolyzable alkoxy groups and heating the product at a temperature and for a time sufficient to form a glass, the improvement comprising fractionally distilling said reaction product in the presence of free water with a fractionating column for a time sufficient to produce a column-head temperature of 100°C to remove all residual alcohol and hydrolyze residual alkoxy groups.
Claim 6
Dependent Claim
89 words
In a process for forming a carbon free silicate glass comprising: forming a hydrolysis reaction product of water, a silicon tetraalkoxide and a metal alkoxide, said reaction product comprising alcohol and hydrolyzable alkoxy groups and heating the product at a temperature and for a time sufficient to form a glass, the improvement comprising fractionally distilling said reaction product in the presence of free water with a fractionating column for a time sufficient to produce a column-head temperature of 100°C to remove all residual alcohol and hydrolyze residual alkoxy groups.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |