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US4865762A
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Polymers which form liquid-crystalline phases
Assignee: BASF SE
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Filing: 1987-05-12
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Granted: 1989-09-12
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Expires: 2007-05-12
Abstract
Abstract Polymers contain, as mesogenic groups, groups which produce a discotic phase, and furthermore can contain pleochroic dyes. The novel polymers possess novel properties, and combinations of properties, which the conventional polymers which form liquid-crystalline phases do not possess. The polymers can be used in electro-optical displays, in storage elements, as electrically or photo-electrically conductive polymers and as strain sensors.
Inventors
- 👤 Willi Kreuder
- 👤 Peter Neumann
- 👤 Karl-Heinz Etzbach
- 👤 Hans-Josef Sterzel
- 👤 Helmut Ringsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C09; C09B; C09B47/00; C09B47/04; C09B47/045; C09B67/00; C09B67/0032; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C09K19/38; C09K19/3804; C09K19/3809; C09K19/3833; C09K19/40; C09K19/406; C09K19/408; C09K2019/328
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A polymer which forms liquid-crystalline phases, wherein the polymer is a polyorganohydrogenosiloxane, with a group which forms a discotic phase and is of the formula ##STR26## being bonded via a radical R to a silicon atom of the siloxane chain where one radical R is a radical of the formula --Y'--Z'--V--Z' and the remaining radicals R are each a radical of the formula --Y'--Z'--A, Y' is a chemical bond, ##STR27## or --CH 2 , Z' is a chemical bond, --O--, --S--, --SO 2 --, --NH--, ##STR28## V is C 4 -C 25 -alkylene, and A is C 4 -C 12 -alkyl.
Claim 2
Dependent Claim
101 words
A polymer which forms liquid-crystalline phases, wherein the polymer is a polyorganohydrogenosiloxane, with a group which forms a discotic phase and is of the formula ##STR26## being bonded via a radical R to a silicon atom of the siloxane chain where one radical R is a radical of the formula --Y'--Z'--V--Z' and the remaining radicals R are each a radical of the formula --Y'--Z'--A, Y' is a chemical bond, ##STR27## or --CH 2 , Z' is a chemical bond, --O--, --S--, --SO 2 --, --NH--, ##STR28## V is C 4 -C 25 -alkylene, and A is C 4 -C 12 -alkyl.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |