Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1983-02-03
1985-06-04
Gron, Teddy S.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
2522995, 350350R, 350350S, 549372, 549376, C09K 334, C02F 113, C07D31906, C09K 1106
Patent
active
045213275
ABSTRACT:
The invention relates to nematic liquid crystals, especially for electro-optical components for the modulation of transmitted or reflected light, as well as for the display of numbers, symbols and images, exhibiting favorable physical characteristics, as well as to a method for the production of the new substances.
It has been found that new liquid crystal 2-substituted-1,3-dioxane-5-carboxylic acid esters of the general formula ##STR1## are suited for use in electro-optical components for the modulation of the light, as well as for the display of numbers, symbols and images, and can be used alone, in mixtures with each other and/or in mixtures with additional liquid crystal or non-liquid crystal substances.
In the method for the production of the new liquid crystal trans-2-substituted-1,3-dioxane-5-carboxylic acid esters, 2-substituted-1,3-dioxane carboxylic acids, with halogen donors such as thionyl chloride, sulfuryl chloride or phosphoric halides, preferably in the absence of organic bases, are converted into the corresponding acid chlorides, which are subsequently esterified in well-known fashion with alcohols or substituted phenols.
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Demus Dietrich
Hauser Anton
Vogel Jorg
Vorbrodt Hans-Matthias
Zaschke Horst
Gron Teddy S.
VEB Werk fur Fernsehelektronik im VEB Kombinat Mikroelektronik
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