US4886619A
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Fluorine-containing chiral smectic liquid crystals
Assignee: 3M Innovative Properties Co
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Filing: 1987-05-29
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Granted: 1989-12-12
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Expires: 2007-05-29
Abstract
Abstract Compounds are provided which comprise a fluorocarbon terminal portion and a chiral hydrocarbon terminal portion, said terminal portions being connected by a central core, said compounds having tilted smectic mesophases or having latent tilted smectic mesophases which develop when said compounds having said latent mesophases are in admixture with said compounds having tilted smectic mesophases or said compounds having latent tilted smectic mesophases.
Inventors
- 👤 Eugene P. Janulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:09
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/20; C09K19/2007; C09K19/2021; C09K19/22; C09K19/28; C09K19/32; C09K19/322; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463; C09K19/3469; C09K19/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
Compounds comprising a fluorocarbon terminal portion represented by the formula -DC q F 2q X where X is hydrogen or fluorine, q is 1 to 20, and D is ##STR95## --O--(CH 2 ) r --, --(CH 2 ) r --, --OSO 2 --, --SO 2 --, --SO 2 --(CH 2 ) r --, --O(CH 2 ) r --O(CH 2 ) r' --, ##STR96## where r and r' are independently 1 to 20, and p is 0 to 4, and a chiral hydrocarbon terminal portion, said terminal portions being connected by a central core, said compounds having tilted smectic mesophases or having latent tilted smectic mesophases which develop when said compounds having said latent mesophases are in admixture and said compounds having tilted smectic mesophases or said compounds having latent tilted smectic mesophases.
Claim 2
Dependent Claim
132 words
Compounds comprising a fluorocarbon terminal portion represented by the formula -DC q F 2q X where X is hydrogen or fluorine, q is 1 to 20, and D is ##STR95## --O--(CH 2 ) r --, --(CH 2 ) r --, --OSO 2 --, --SO 2 --, --SO 2 --(CH 2 ) r --, --O(CH 2 ) r --O(CH 2 ) r' --, ##STR96## where r and r' are independently 1 to 20, and p is 0 to 4, and a chiral hydrocarbon terminal portion, said terminal portions being connected by a central core, said compounds having tilted smectic mesophases or having latent tilted smectic mesophases which develop when said compounds having said latent mesophases are in admixture and said compounds having tilted smectic mesophases or said compounds having latent tilted smectic mesophases.
Claim 3
Dependent Claim
13 words
The compounds of claim 1 wherein said compounds have a suppressed cholesteric phase.
Claim 4
Dependent Claim
260 words
The chiral smectic or latent chiral smectic liquid crystal compounds represented by the formula ##STR97## where M, N, and P are each independently ##STR98## a, b, and c are each independently zero or an integer of from 1 to 3 with the proviso that the sum of a+b+c be at least 2; each A and B are independently nil, ##STR99## --CH═N--, --CH 2 --O--, ##STR100## --O--, --CH 2 CH 2 --, --CH═CH--, or --C.tbd.C--; each X, Y and Z are independently --H, --Cl, --F, --OCH 3 , --CH 3 , --NO 2 , --OH, --Br, --I, or --CN; each l, m, and n are independently zero or an integer of 1 to 4; D is ##STR101## --O--(CH 2 ) r --, --(CH 2 ) r --, --OSO 2 --, --SO 2 --, --SO 2 --(CH 2 ) r --, --O(CH 2 ) r --O(CH 2 ) r' --, ##STR102## where r and r' are independently 1 to 20, and p is 0 to 4; R is --OC q H 2q --OC q , H 2q'+1' --C q H 2q --O--C q' H 2q'+1 , --C q H 2q --R', --O--C q H q H 2q --R', ##STR103## where R' is --Cl, --F, --CF 3 , --NO 2 , --CN, --H, ##STR104## and q and q' are independently 1 to 20 with the proviso that R is chiral; R f is --C q F 2q --X or --C q F 2q --O--C q' F 2q' --X where X is H or F and q and q' are independently 1 to 20.
Claim 5
Dependent Claim
260 words
The chiral smectic or latent chiral smectic liquid crystal compounds represented by the formula ##STR97## where M, N, and P are each independently ##STR98## a, b, and c are each independently zero or an integer of from 1 to 3 with the proviso that the sum of a+b+c be at least 2; each A and B are independently nil, ##STR99## --CH═N--, --CH 2 --O--, ##STR100## --O--, --CH 2 CH 2 --, --CH═CH--, or --C.tbd.C--; each X, Y and Z are independently --H, --Cl, --F, --OCH 3 , --CH 3 , --NO 2 , --OH, --Br, --I, or --CN; each l, m, and n are independently zero or an integer of 1 to 4; D is ##STR101## --O--(CH 2 ) r --, --(CH 2 ) r --, --OSO 2 --, --SO 2 --, --SO 2 --(CH 2 ) r --, --O(CH 2 ) r --O(CH 2 ) r' --, ##STR102## where r and r' are independently 1 to 20, and p is 0 to 4; R is --OC q H 2q --OC q , H 2q'+1' --C q H 2q --O--C q' H 2q'+1 , --C q H 2q --R', --O--C q H q H 2q --R', ##STR103## where R' is --Cl, --F, --CF 3 , --NO 2 , --CN, --H, ##STR104## and q and q' are independently 1 to 20 with the proviso that R is chiral; R f is --C q F 2q --X or --C q F 2q --O--C q' F 2q' --X where X is H or F and q and q' are independently 1 to 20.
Claim 6
Dependent Claim
10 words
The compound of claim 1 represented by the formula ##STR105##
Claim 7
Dependent Claim
38 words
A liquid crystal display device comprising two bounding plates, the inside surfaces of which have electrodes applied thereto and at least one of which is transparent, said device containing a compound of claim 1 between said bounding plates.
Claim 8
Dependent Claim
10 words
The device of claim 5 wherein said device is surface-stabilized.
Claim 9
Dependent Claim
10 words
The device of claim 5 wherein said device is non-surface-stabilized.
Claim 10
Dependent Claim
11 words
The device of claim 5 wherein said device is optically addressable.
Claim 11
Dependent Claim
17 words
The device of claim 5 further comprising at least one pleochroic dye in admixture with said compound.
Claim 12
Dependent Claim
16 words
A mixture of at least one compound of claim 1 and an additional liquid crystal material.
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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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |