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US4115310A
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Liquid crystalline composition
Assignee: Kawamura Institute of Chemical Research
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Filing: 1976-10-13
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Granted: 1978-09-19
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Expires: 1996-10-13
Abstract
Abstract A liquid crystalline composition comprising a nematic liquid crystalline substance and as an additive, a 1,8-diazo-bicyclo(5,4,0) undecene-7 alkyl ammonium salt of benzoic acid optionally having a substituent at the paraposition.
Inventors
- 👤 Hisato Sato
- 👤 Masayuki Tazume
- 👤 Takasi Yamaki
- 👤 Yutaka Fujita
- 👤 Yoshi Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:54
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A liquid crystalline composition comprising a nematic liquid crystalline substance having negative dielectric anisotropy and as an additive, at least one compound of the general formula ##STR15## wherein X is an amino group, a nitro group, a chlorine atom, a hydrogen atom, or a straight-chain alkyl group containing 1 to 6 carbon atoms, and R is a straight-chain alkyl group containing 10 to 20 carbon atoms with the proviso that when X is a hydrogen atom or a straight-chain alkyl group containing 1 to 6 carbon atoms, R is a straight-chain alkyl group containing 14 to 20 carbon atoms, and said additive being used in the range of 0.05 to 0.5% by weight of the nematic liquid crystalline substance.
Claim 2
Dependent Claim
119 words
A liquid crystalline composition comprising a nematic liquid crystalline substance having negative dielectric anisotropy and as an additive, at least one compound of the general formula ##STR15## wherein X is an amino group, a nitro group, a chlorine atom, a hydrogen atom, or a straight-chain alkyl group containing 1 to 6 carbon atoms, and R is a straight-chain alkyl group containing 10 to 20 carbon atoms with the proviso that when X is a hydrogen atom or a straight-chain alkyl group containing 1 to 6 carbon atoms, R is a straight-chain alkyl group containing 14 to 20 carbon atoms, and said additive being used in the range of 0.05 to 0.5% by weight of the nematic liquid crystalline substance.
Claim 3
Dependent Claim
14 words
The liquid crystalline composition according to claim 1 wherein X is an amino group.
Claim 4
Dependent Claim
14 words
The liquid crystalline composition according to claim 1 wherein X is a nitro group.
Claim 5
Dependent Claim
14 words
The liquid crystalline composition according to claim 1 wherein X is a chlorine atom.
Claim 6
Dependent Claim
13 words
The liquid crystalline composition of claim 1 wherein X is a hydrogen atom.
Claim 7
Dependent Claim
20 words
The liquid crystalline composition of claim 1 wherein X is a straight-chain alkyl group containing 1 to 6 carbon atoms.
Claim 8
Dependent Claim
32 words
The liquid crystalline composition according to claim 1 wherein said additive is used in an amount of 0.1 to 0.3% by weight, based on the weight of the nematic liquid crystalline substance.
Claim 9
Dependent Claim
172 words
The liquid crystalline composition according to claim 1 wherein the nematic liquid crystalline substance is selected from the group consisting of benzylidene aniline-type nematic liquid crystalline substances of the general formula ##STR16## wherein R 1 and R 2 both represent C n H 2n+1 --, C n H 2n+1 O--, or C n H 2n+1 COO--, in which n is an integer of 1 to 9, azoxybenzene-type nematic liquid crystalline substances of the general formula ##STR17## wherein R 1 is C n H 2N+1 --, or C n H 2n+1 O--, and R 2 is C n H 2n+1 --, C n H 2n+1 COO--, in which n is an integer of 1 to 9, and phenyl benzoate-type nematic liquid crystalline substances of the general formula ##STR18## wherein R 1 is C n H 2n+1 --, or C n H 2n+1 O--, and R 2 is C n H 2n+1 -- or C n H 2n+1 COO--, in which n is an integer of 1 to 9, or mixtures of these substances.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |