US4486332A
Expired / Lapsed
US
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Liquid crystalline nematic substances
Assignee: BERLIN-OBERSCHOENEWEIDE
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Filing: 1982-08-04
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Granted: 1984-12-04
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Expires: 2002-08-04
Abstract
Abstract The invention relates to liquid crystal nematic substances based on new derivatives of 1,3-dioxanes in electro-optical components, which are used, for instance, as displays in electronic clocks and computer systems. The subject of the invention is nematic liquid crystal substances with favorable properties concerning melting and clear temperatures, stability against thermal stress and electrical fields, low viscosity and low threshold voltage. It was found that liquid crystal 2,5-di-substituted cyclohexyl derivatives of 1,3 dioxanes, having the general formula ##STR1## R 1 =C n H 2n+1 ; C n H 2n+1 O; C n H 2n+1 COO; CN; NO 2 ; F; Cl; Br and R 2 =C n H 2n+1 with n+1 to 9 are suitable for use in electro-optical components.
Inventors
- 👤 Dietrich Demus
- 👤 Horst Zaschke
- 👤 Hans-Matthias Vorbrodt
- 👤 Sylvia Deresh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:29
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
59 words
A liquid crystal nematic composition, comprising at least one 2,5-di-substituted cyclohexyl derivative of 1,3-dioxane having the general formula: ##STR11## wherein: R 1 =C n H 2n+1 ; C n H 2n+1 O; C n H 2n+1 COO; CN; NO 2 ; F; Cl; Br R 2 =C n H 2n+1 and n=1 to 9 and mixtures of said derivatives.
Claim 2
Dependent Claim
59 words
A liquid crystal nematic composition, comprising at least one 2,5-di-substituted cyclohexyl derivative of 1,3-dioxane having the general formula: ##STR11## wherein: R 1 =C n H 2n+1 ; C n H 2n+1 O; C n H 2n+1 COO; CN; NO 2 ; F; Cl; Br R 2 =C n H 2n+1 and n=1 to 9 and mixtures of said derivatives.
Claim 3
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR12##
Claim 4
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR13##
Claim 5
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR14##
Claim 6
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR15##
Claim 7
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR16##
Claim 8
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR17##
Claim 9
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR18##
Claim 10
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR19##
Claim 11
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR20##
Claim 12
Dependent Claim
15 words
A liquid crystal nematic composition according to claim 1, comprising a compound which is ##STR21##
Claim 13
Dependent Claim
31 words
An electro-optical device for modulation of incident and transmitted light, and for the display of numerals, symbols, or images, containing at least one nematic liquid crystal composition according to claim 1.
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