US4948843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye polymer/sol-gel composites
Assignee: Eastman Kodak Co
•
Filing: 1989-05-30
•
Granted: 1990-08-14
•
Expires: 2009-05-30
Abstract
Abstract Dye-containing polymers wherein the dyes are organic in nature are incorporated into glasses produced by a sol-gel technique. The glasses may be inorganic or organic-modified metal oxide heteropolycondensates. The dye-containing polymers are covalently bonded to the glass through a linking group. The products of this invention can be used to make optically clear colored films which can be employed in the imaging, optical, solar heat energy and related arts.
Inventors
- 👤 Michael R. Roberts
- 👤 Bradley K. Coltrain
- 👤 Sharon M. Melpolder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:08
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
A composite comprising a dye-containing polymer covalently bonded to a silicic acid heteropolycondensate, said dye-containing polymer having a backbone, and dye and SiR' x (OR) a units bonded to said backbone through a linking group; said silicic acid heteropolycondensate being the reaction product produced by hydrolysis and condensation of a source of said heteropolycondensate, said source having the formula R n 2 SiX b ; R 1 , R', and R 2 are alike or different, and are selected from alkyl groups having 1 to about 4 carbon atoms, X is a hydrolyzable group, (x+a) is a positive integer equal to one less than the valence of silicon, x being equal to 0 or 1, n is equal to zero, 1, or 2, and b is equal to the valence of silicon minus the value of n; said composite being characterized by covalent bonding between said polymer and said condensate, said bonding having been produced by participation of said SiR' x (OR) a units in said hydrolysis and condensation reaction forming said heteropolycondensate; said composite being further characterized by producing optically clear films.
Claim 2
Dependent Claim
183 words
A composite comprising a dye-containing polymer covalently bonded to a silicic acid heteropolycondensate, said dye-containing polymer having a backbone, and dye and SiR' x (OR) a units bonded to said backbone through a linking group; said silicic acid heteropolycondensate being the reaction product produced by hydrolysis and condensation of a source of said heteropolycondensate, said source having the formula R n 2 SiX b ; R 1 , R', and R 2 are alike or different, and are selected from alkyl groups having 1 to about 4 carbon atoms, X is a hydrolyzable group, (x+a) is a positive integer equal to one less than the valence of silicon, x being equal to 0 or 1, n is equal to zero, 1, or 2, and b is equal to the valence of silicon minus the value of n; said composite being characterized by covalent bonding between said polymer and said condensate, said bonding having been produced by participation of said SiR' x (OR) a units in said hydrolysis and condensation reaction forming said heteropolycondensate; said composite being further characterized by producing optically clear films.
Claim 3
Dependent Claim
13 words
A composite of claim 1 wherein R 2 n SiX b is tetramethoxysilane.
Claim 4
Dependent Claim
12 words
A composite of claim 1 wherein said dye is a cyanine dye.
Claim 5
Dependent Claim
12 words
A composite of claim 3 wherein said dye has the formula: ##STR36##
Claim 6
Dependent Claim
12 words
A composite of claim 3 wherein said dye has the formula: ##STR37##
Claim 7
Dependent Claim
23 words
A composite of claim 1 wherein the content of dye in said dye-containing polymer is from about 1 to about 80 weight percent.
References Cited (Backward Citations)
US4374933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |