US4892676A
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Phenyl pyrimidine compound and liquid crystalline composition
Assignee: CLARIANT AZ (DEUTSCHLAND) AG
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Filing: 1987-09-08
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Granted: 1990-01-09
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Expires: 2007-09-08
Abstract
Abstract A phenyl pyrimidine compound of this invention represented by the following formula (I) forms a smectic C phase and is useful for a constituent of a ferroelectric liquid crystal composition. R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group, Py represents 2,5-pyrimidine, R 1 and R 2 represent independently an acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or a linear alkoxy group having more than seven carbon atoms. The compound of this invention has a properties of ○1 a low viscosity, ○2 of forming a smectic C phase (Sc), ○3 of being more than 70° C. of an upper limit temperature of a Sc phase. By applying these properties it is able to give a good alignment effect of a composition comprising the compound using a conventional alignment effect of a TN type cell.
Inventors
- 👤 Takao Sakurai
- 👤 Tadahiko Yokota
- 👤 Eri Komatsu
- 👤 Naoko Mikami
- 👤 Ryoichi Higuchi
- 👤 Koji Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A smectic C liquid crystal compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms.
Claim 2
Dependent Claim
61 words
A smectic C liquid crystal compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms.
Claim 3
Dependent Claim
81 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I): R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents a 1,4-phenylene group and Py represents a 2,5-pyrimidyl group, R 1 and R 2 represent independently, a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one other smectic C liquid crystal phenyl pyrimidine.
Claim 4
Dependent Claim
81 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I): R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents a 1,4-phenylene group and Py represents a 2,5-pyrimidyl group, R 1 and R 2 represent independently, a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one other smectic C liquid crystal phenyl pyrimidine.
Claim 5
Dependent Claim
78 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one smectic C liquid crystal ester compound.
Claim 6
Dependent Claim
78 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one smectic C liquid crystal ester compound.
Claim 7
Dependent Claim
78 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one smectic C liquid crystal biphenyl compound.
Claim 8
Dependent Claim
78 words
A smectic C liquid crystal composition comprising at least one phenyl pyrimidine compound represented by the following formula (I) R.sub.1 --Ph--Py--R.sub.2 (I) wherein Ph represents 1,4-phenylene group and Py represents 2,5-pyrimidyl group, R 1 and R 2 represent independently a linear acyloxy group or alkoxy group, either R 1 or R 2 represents a linear acyloxy group or linear alkoxy group having more than the seven carbon atoms, and at least one smectic C liquid crystal biphenyl compound.
Claim 9
Dependent Claim
15 words
The liquid crystal composition as set forth in claim 2, which has a nematic phase.
Claim 10
Dependent Claim
15 words
The liquid crystal composition as set forth in claim 3, which has a nematic phase.
Claim 11
Dependent Claim
15 words
The liquid crystal composition as set forth in claim 4, which has a nematic phase.
Claim 12
Dependent Claim
29 words
The chiral smectic C liquid crystal composition comprising a smectic C liquid crystal composition as set forth in claim 2, which further comprises at least one optically active compound.
Claim 13
Dependent Claim
29 words
The chiral smectic C liquid crystal composition comprising a smectic C liquid crystal composition as set forth in claim 3, which further comprises at least one optically active compound.
Claim 14
Dependent Claim
29 words
The chiral smectic C liquid crystal composition comprising a smectic C liquid crystal composition as set forth in claim 4, which further comprises at least one optically active compound.
Claim 15
Dependent Claim
40 words
A smectic C phenyl pyrimidine compound of formula (I) ##STR3## wherein R 1 is a linear alkoxy of more than seven carbon atoms and group R 2 is a linear acyloxy or linear alkoxy group having more than seven carbons.
Claim 16
Dependent Claim
40 words
A smectic C phenyl pyrimidine compound of formula (I) ##STR3## wherein R 1 is a linear alkoxy of more than seven carbon atoms and group R 2 is a linear acyloxy or linear alkoxy group having more than seven carbons.
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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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |