US4637896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric liquid crystals
Assignee: ADVANTAGE TECHNOLOGY Inc
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Filing: 1984-10-12
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Granted: 1987-01-20
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Expires: 2004-10-12
Abstract
Abstract The present invention concerns novel cholesteric liquid crystalline monomers and combinations thereof with materials that will support formation of a mixture which demonstrates cholesteric liquid crystalline properties. These materials may be formed as coatings, heated or cooled to a desired temperature to cause the cholesteric coating to exhibit a desired optical response, and photopolymerized to essentially fix the optical characteristics of the resulting polymer.
Inventors
- 👤 Paul J. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/36; C09K2019/0444; C09K2019/0448; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A polymeric coating exhibiting a fixed cholesteric optical response, said coating being obtained by photopolymerizing a composition comprising a photopolymerizable monomer having the structure: ##STR7## where R 1 =H or CH 3 , A=--R 2 --, --R 3 O--, or --R 4 O--, R 2 =an alkylene chain having from 3-14 methylene or lower alkyl-substituted methylene groups, R 3 =an alkylene chain having from 2-14 methylene or lower alkyl-substituted methylene groups, R 4 =an alkylene ether, diether or triether having a total of from 3-14 carbon atoms in the alkylene moieties, provided that the terminal alkylene moiety adjacent the carbonate moiety comprises not less than two carbon atoms, and y=0 or 1; and a suitable photoinitiator, said composition having exhibited cholesteric liquid crystalline properties at the time photopolymerization occurred.
Claim 2
Dependent Claim
129 words
A polymeric coating exhibiting a fixed cholesteric optical response, said coating being obtained by photopolymerizing a composition comprising a photopolymerizable monomer having the structure: ##STR7## where R 1 =H or CH 3 , A=--R 2 --, --R 3 O--, or --R 4 O--, R 2 =an alkylene chain having from 3-14 methylene or lower alkyl-substituted methylene groups, R 3 =an alkylene chain having from 2-14 methylene or lower alkyl-substituted methylene groups, R 4 =an alkylene ether, diether or triether having a total of from 3-14 carbon atoms in the alkylene moieties, provided that the terminal alkylene moiety adjacent the carbonate moiety comprises not less than two carbon atoms, and y=0 or 1; and a suitable photoinitiator, said composition having exhibited cholesteric liquid crystalline properties at the time photopolymerization occurred.
Claim 3
Dependent Claim
30 words
The invention as set forth in claim 1 hereof wherein said composition comprises a second material which facilitate to permit formation of a coating that exhibits cholesteric liquid crystalline properties.
Claim 4
Dependent Claim
22 words
The invention as set forth in claim 2 hereof wherein said second material is a compound having the structure of Formula I.
Claim 5
Dependent Claim
28 words
The invention as set forth in claim 2 hereof wherein said second material is a photopolymerizable material having a structure which is different from that of Formula I.
Claim 6
Dependent Claim
28 words
The invention as set forth in claim 2 hereof wherein said second material is a mesogenic material having a structure which is different from that of Formula I.
Claim 7
Dependent Claim
17 words
The invention as set forth in claim 5 hereof wherein said second material comprises a photopolymerizable moiety.
Claim 8
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said composition comprises a cross-linking agent.
Claim 9
Dependent Claim
23 words
The invention as set forth in claim 2 hereof wherein at least one of the alkylene moieties of R 4 is lower-alkyl substituted.
Claim 10
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said coating selectively reflects visible light.
Claim 11
Dependent Claim
21 words
The invention as set forth in claim 9 hereof wherein said coating selectively reflects visible light to provide multiple color effects.
Claim 12
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said coating selectively reflects ultraviolet light.
Claim 13
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said coating selectively reflects infrared light.
Claim 14
Dependent Claim
23 words
The invention as set forth in claim 2 hereof wherein said composition is substantially uniformly mechanically aligned to provide a cholesteric planar texture.
Claim 15
Dependent Claim
25 words
The invention as set forth in claim 2 hereof wherein said composition is selectively mechanically aligned to provide a cholesteric planar texture in selected areas.
Claim 16
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said coating comprises a homeotropic texture.
Claim 17
Dependent Claim
16 words
The invention as set forth in claim 2 hereof wherein said coating comprises a focalconic texture.
References Cited (Backward Citations)
US4293435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |