EP0076633A1
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Guest-host type liquid crystal composition
Assignee: Hitachi Ltd En Mitsubishi Kasei Corp Beid
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Filing: 1982-09-29
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Granted: —
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Expires: 2002-09-29
Abstract
Abstract A guest-host type liquid crystal composition comprising one or more host liquid crystals and dissolved therein one or more pleochroic dyes having a trans-4-substituted cyclohexyl group, preferably in an amount of 70% by mole or more of said trans-4-substituted cyclohexyl group among 4-substituted cyclohexyl groups, can afford a liquid crystal display device improved in display contrast and good stability due to no photo-chemical reaction of the liquid crystal composition.
Inventors
- 👤 Masaharu Kaneko
- 👤 Tetsuo Ozawa
- 👤 Tomio Yoneyama
- 👤 Shuji Imazeki
- 👤 Akio Mukoh
- 👤 Mikio Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 23:41
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B1/00; C09B1/02; C09B1/06; C09B1/08; C09B1/16; C09B1/20; C09B1/50; C09B1/503; C09B1/51; C09B1/54; C09B1/542; C09B1/56; C09B1/58; C09B1/60; C09B23/00; C09B23/10; C09B23/102; C09B25/00; C09B29/00; C09B29/0003; C09B29/06; C09B29/08; C09B29/0805; C09B29/0807; C09B29/0809; C09B29/0811; C09B29/083; C09B29/34; C09B29/36; C09B29/3604; C09B31/00; C09B31/02; C09K; C09K19/00; C09K19/52; C09K19/60
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
34 words
A guest-host type liquid crystal composition which comprises one or more host liquid crystals, and one or more pleochroic dyes which have a trans-4-substituted cyclohexyl group and are dissolved in said host liquid crystals.
Claim 2
Dependent Claim
34 words
A guest-host type liquid crystal composition which comprises one or more host liquid crystals, and one or more pleochroic dyes which have a trans-4-substituted cyclohexyl group and are dissolved in said host liquid crystals.
Claim 3
Dependent Claim
47 words
A guest-host type liquid crystal composition according to Claim 1, wherein the dye having a trans-4- substituted cyclohexyl group is at least one member selected from the group consisting of anthraquinone dyes, azo dyes, azomethine dyes, quinophthalone dyes, perynone dyes, thioindigo dyes, naphthalimide dyes and oxazine dyes.
Claim 4
Dependent Claim
108 words
A guest-host type liquid crystal composition according to Claim 1, wherein the dye having a trans-4- substituted cyclohexyl group is represented by the formula: wherein W is a trans-4-substituted cyclohexyl group; D is a grouping of organic dye containing no ionic group; B is -0- , -S- , -CH 2 - , -NH- or -OCOO- ; X 1 and X 2 are independently an oxygen atom, a sulfur atom, a group of the formula: -CH 2 - or -N R 1- ; R 1 is a hydrogen atom or a lower alkyl group; m is 1, 2 or 3; and ℓ is zero or an integer of 1.
Claim 5
Dependent Claim
206 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein K is a group of the formula: or a nitrogen-containing heterocyclic group; Y 1 is a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a nitro group, a cyano group, a carboxylic acid ester group, an acyloxy group, an alkylsulfonyl group, an aryl group, a halogen atom, a group of the formula: ―( B―)ℓ W in which B, W and ℓ are as defined in Claim 3, or R 2 and R 3 are independently a hydrogen atom or an alkyl group or R 2 and R 3 may form together with each other a nitrogen-containing ring; Z 1 , Z 2 and Z 3 are independently a hydrogen atom, a halogen atom, a methyl group, a hydroxyl group, a methoxy group, or a cyano group, or at least one of Z 1 to Z 3 may form together with R 2 and R 3 a part of a julolidine ring, or Z 1 and Z 2 may form a part of a naphthalene ring by combining each other; and n is zero or an integer of 1 or 2.
Claim 6
Dependent Claim
105 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y , Y , Y 4 and Y 5 are independently a hydrogen atom, an amino group, or a hydroxyl group, and at least one of them is either an amino group or a hydroxyl group; Y 6 is a hydrogen atom, a halogen atom, an alkoxy group, or a group of the formula: ―(B―)ℓ W in which B, W and ℓ are as defined in Claim 3; and Y 7 is a hydrogen atom, a halogen atom, or a cyano group.
Claim 7
Dependent Claim
50 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y 8 and Y 9 are independently an amino group or a hydroxyl group; Y 10 is a hydrogen atom, a halogen atom or an alkoxy group.
Claim 8
Dependent Claim
89 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y 11 and Y 13 are independently a hydrogen atom, an amino group, or a hydroxyl group; Y 12 is a hydrogen atom, an amino group, a hydroxyl group or a group of the formula: , in which B, W and ℓ are as defined in Claim 3; and Y 14 and Y 15 are independently a hydrogen atom, a halogen atom, or an alkoxy group.
Claim 9
Dependent Claim
75 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: or wherein Y 16 is a hydrogen atom or a hydroxyl group; Y 17 is a hydrogen atom or a halogen atom; Y 18 is a hydrogen atom, an alkyl group, an alkoxy group or a group of the formula; in which B, W and ℓ are as defined in Claim 3. -
Claim 10
Dependent Claim
68 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: or wherein Y 19 and Y 20 are independently a hydrogen atom, a group of the formula: ; R 4 is an alkyl group or a group of the formula: ―( B ―)ℓ W, in which B, W and ℓ are as defined in Claim 3.
Claim 11
Dependent Claim
69 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y 21 and Y 22 are independently a group of the formula: R 5 is a hydrogen atom, a halogen atom, an alkoxy group or a group of the formula: ―( B ―)ℓ W in which B, W and ℓ are as defined in Claim 3.
Claim 12
Dependent Claim
36 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y 23 is a hydrogen atom, an alkyl group or an alkoxy group.
Claim 13
Dependent Claim
71 words
A guest-host type liquid crystal composition according to Claim 3, wherein the D in the formula (I) is represented by the formula: wherein Y 24 and Y 25 are independently a hydrogen atom, or a halogen atom; Y 26 is a hydrogen atom or an alkoxy group, an acyloxy group or a group of the formula: ―(B―)ℓ W , in which B, W and ℓ are as defined in Claim 3.
Claim 14
Dependent Claim
59 words
A guest-host type liquid crystal composition which comprises one or more host liquid crystals, and one or more pleochroic dyes which have a 4- substituted cyclohexyl group and are dissolved in the host liquid crystals, the pleochroic dyes having a trans-4-substituted cyclohexyl group being present in an amount of about 70% by mole or more in said pleochroic dyes.
Claim 15
Dependent Claim
59 words
A guest-host type liquid crystal composition which comprises one or more host liquid crystals, and one or more pleochroic dyes which have a 4- substituted cyclohexyl group and are dissolved in the host liquid crystals, the pleochroic dyes having a trans-4-substituted cyclohexyl group being present in an amount of about 70% by mole or more in said pleochroic dyes.
Claim 16
Dependent Claim
21 words
A liquid crystal display device containing a guest host type liquid crystal composition according to any one of the preceding claims.
References Cited (Backward Citations)
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