US4222887A
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Liquid crystal composition
Assignee: Canon Inc
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Filing: 1978-07-11
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Granted: 1980-09-16
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Expires: 1998-07-11
Abstract
Abstract A liquid crystal composition comprising a mixture of at least one kind of liquid crystal substance represented by the following general formula (1) and at least one kind of compound selected from the groups consisting of the compounds represented by the following general formulas (2) to (8): ##STR1## wherein R 1 and R 2 are CN group or selected from C n H 2n+1 , C n H 2n+1 O and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and both R 1 and R 2 are not CN group simultaneously; ##STR2## wherein R 3 and R 4 are CN group, or selected from C n H 2n+1 , C n H 2n+1 O, C n H 2n+1 COO and C n H 2n+1 OCOO groups where n is an integer of from 1 to 10, and both R 3 and R 4 are not CN group simultaneously; R 5 is selected from the above-described groups, except for CN group; and R 6 is selected from --COO--, --C 2 H 4 --, --O--CH 2 -- and --C 2 H 2 --.
Inventors
- 👤 Yohji Matsufuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:09
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
176 words
A liquid crystal composition comprising a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR24## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formulas (2) and (3): ##STR25## wherein R 3 and R 4 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n h 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 3 R 4 are not CN groups simultaneously; ##STR26## wherein r 5 is selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10.
Claim 2
Dependent Claim
176 words
A liquid crystal composition comprising a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR24## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formulas (2) and (3): ##STR25## wherein R 3 and R 4 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n h 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 3 R 4 are not CN groups simultaneously; ##STR26## wherein r 5 is selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10.
Claim 3
Dependent Claim
39 words
A liquid crystal conposition as claimed in claim 1, wherein C n H 2n+1 , C n+1 O and C n H 2n+1 COO groups in the general formulas (1), (2) and (3) are in the straight chain form.
Claim 4
Dependent Claim
50 words
A liquid crystal composition as claimed in claim 1, wherein R 1 and R 2 in the general formula (1) are selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 8.
Claim 5
Dependent Claim
50 words
A liquid crystal composition as claimed in claim 1, wherein one of R 1 and R 2 in the general formula (1) is a CN group, while the other one is selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups.
Claim 6
Dependent Claim
60 words
A liquid crystal composition as claimed in claim 1, wherein at least one of R 3 and R 4 , and R 5 in the general formulas (2) and (3) are selected from C n H 2n+1 , C n H 2n+1 O and C n H 2n+1 COO groups where n is an integer of from 2 to 8.
Claim 7
Dependent Claim
26 words
A liquid crystal composition as claimed in claim 1, wherein one of R 3 and R 4 in the general formula (2) is a CN group.
Claim 8
Dependent Claim
38 words
A liquid crystal composition as claimed in claim 1, wherein said mixture of liquid crystal substances consists of two or more kinds of compounds belonging to the same general formulas (1) to (3) and exhibits positive dielectric anisotropy.
Claim 9
Dependent Claim
28 words
A liquid crystal composition as claimed in claim 1, wherein each and every liquid crystal substance represented by the general formulas (1) to (3) has positive dielectric anisotropy.
Claim 10
Dependent Claim
33 words
A liquid crystal composition as claimed in claim 1, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges form 5 to 90% by weight.
Claim 11
Dependent Claim
33 words
A liquid crystal composition as claimed in claim 1, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 10 to 70% by weight.
Claim 12
Dependent Claim
48 words
A liquid crystal composition as claimed in claim 1, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 1- to 90% by weight, when it is mixed with the liquid crystal substance represented by the general formula (3).
Claim 13
Dependent Claim
26 words
A liquid crystal composition as claimed in claim 1, further comprising an amount not exceeding 10% by weight of the compound of the general formula: ##STR27##
Claim 14
Dependent Claim
26 words
A liquid crystal composition as claimed in claim 1, further comprising an amount not exceeding 10% by weight of the compound of the general formula: ##STR28##
Claim 15
Dependent Claim
26 words
A liquid crystal composition as claimed in claim 1, further comprising an amount not exceeding 10% by weight of the compound of the general formula: ##STR29##
Claim 16
Dependent Claim
23 words
A liquid crystal composition as claimed in claim 1, further comprising an amount not exceeding 5% by weight of a cholesteric liquid crystal.
Claim 17
Dependent Claim
24 words
A liquid crystal composition as claimed in claim 1, further comprising an amount not exceeding 5% by weight of a chiral nematic liquid crystal.
Claim 18
Dependent Claim
142 words
A liquid crystal composition consisting of a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR30## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formula (2): ##STR31## wherein R 3 and R 4 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 3 and R 4 are not CN groups simultaneously.
Claim 19
Dependent Claim
142 words
A liquid crystal composition consisting of a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR30## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formula (2): ##STR31## wherein R 3 and R 4 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 3 and R 4 are not CN groups simultaneously.
Claim 20
Dependent Claim
31 words
A liquid crystal composition as claimed in claim 17, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 1 to 99%.
Claim 21
Dependent Claim
33 words
A liquid crystal composition as claimed in claim 17, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 5 to 90% by weight.
Claim 22
Dependent Claim
33 words
A liquid crystal composition as claimed in claim 17, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 10 to 70% by weight.
Claim 23
Dependent Claim
125 words
A liquid crystal composition consisting of a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR32## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formula (2): ##STR33## wherein R 5 is selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10.
Claim 24
Dependent Claim
125 words
A liquid crystal composition consisting of a mixture of at least one kind of liquid crystal substance represented by the following general formula (1): ##STR32## wherein R 1 and R 2 are selected from CN, C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10, and wherein both R 1 and R 2 are not CN groups simultaneously; and at least one kind of liquid crystal substance represented by the following general formula (2): ##STR33## wherein R 5 is selected from C n H 2n+1 , C n H 2n+1 O, and C n H 2n+1 COO groups where n is an integer of from 1 to 10.
Claim 25
Dependent Claim
31 words
A liquid crystal composition as claimed in claim 21, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 1 to 90%.
Claim 26
Dependent Claim
31 words
A liquid crystal composition as claimed in claim 21, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 5 to 70%.
Claim 27
Dependent Claim
31 words
A liquid crystal composition as claimed in claim 21, wherein the amount of the liquid crystal substance represented by the general formula (1) in said mixture ranges from 10 to 50%.
Claim 28
Dependent Claim
85 words
A liquid crystal composition as claimed in claim 1, further comprising at least one liquid crystal compound selected from compounds of formulas (6) and (8): ##STR34## wherein R 3 and R 4 in formula (6) are selected from CN, C n H 2n+1 , C n H 2n+1 O, C n H 2n+1 COO and C n H 2n+1 OCOO groups; wherein said R 3 and R 4 are not CN groups simultaneously; and wherein R 5 has the same meansing as in claim 1.
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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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |