Compositions – Liquid crystal compositions
Patent
1975-10-03
1977-04-12
Padgett, Benjamin R.
Compositions
Liquid crystal compositions
260465D, 350160LC, C09K 334, G02F 113
Patent
active
040174166
ABSTRACT:
Novel nematic liquid crystal compounds having a broad nematic temperature range and a positive dielectric anisotropy by themselves, that is, p-cyanophenyl 4-alkyl-4'-biphenylcarboxylates wherein the alkyl is a straight chain alkyl group having 4-8 carbon atoms or a branched alkyl group having 4-7 carbon atoms and having methyl group as branched group, and a method for preparing the same are provided. Further, novel nematic liquid crystal compositions having a broader nematic temper range i.e. a sufficiently lower nematic limit and a sufficiently higher upper nematic limit is provided by using said compounds.
REFERENCES:
patent: 3923857 (1975-12-01), Doller et al.
patent: 3925238 (1975-12-01), Gavrilovic
patent: 3947375 (1976-03-01), Gray et al.
patent: 3952046 (1976-04-01), Scherrer et al.
Morrison; R. T. & Boyd; R. N., Organic Chemistry, Allyn & Bacon, Inc., Boston, pp. 440-441, 444-445, 474, 622 (1959).
Inukai Takashi
Ishibe Tetsuya
Sato Hideo
Sugimori Shigeru
Chisso Corporation
Gron T. S.
Padgett Benjamin R.
Philpitt Fred
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