US4937013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing liquid crystalline polymer composites
Assignee: CNA Holdings LLC
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Filing: 1988-09-19
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Granted: 1990-06-26
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Expires: 2008-09-19
Abstract
Abstract This invention provides an optical medium which consists of a composite of a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline polymer component. In one embodiment this invention provides a sole-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and a liquid crystalline polymer.
Inventors
- 👤 Alan Buckley
- 👤 Tessie M. Che
- 👤 Thomas M. Leslie
- 👤 James B. Stamatoff
- 👤 Dagobert E. Stuetz
- 👤 Donald R. Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:38
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K2323/00; C09K2323/06; C09K2323/061; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A process for producing a composite composition comprising a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline component, which comprises (1) hydrolyzing tetraalkoxysilane under acidic or basic pH conditions in a sol-gel reaction medium comprising water and a water-miscible organic solvent until gellation of the reaction medium is completed; (2) removing the solvent medium by drying to provide a porous glass monolith; and (3) impregnating the porous glass monolith with a liquid crystalline polymer component; wherein the glass monolith microporous structure has pore diameters in the range between about 15-2000 angstroms, and substantially all of the pore diameters are within about a 100 angstrom diameter variation range.
Claim 2
Dependent Claim
112 words
A process for producing a composite composition comprising a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline component, which comprises (1) hydrolyzing tetraalkoxysilane under acidic or basic pH conditions in a sol-gel reaction medium comprising water and a water-miscible organic solvent until gellation of the reaction medium is completed; (2) removing the solvent medium by drying to provide a porous glass monolith; and (3) impregnating the porous glass monolith with a liquid crystalline polymer component; wherein the glass monolith microporous structure has pore diameters in the range between about 15-2000 angstroms, and substantially all of the pore diameters are within about a 100 angstrom diameter variation range.
Claim 3
Dependent Claim
13 words
A composite composition produced in accordance with the sol-gel process of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |