Polar liquid crystal

Details Polar liquid crystal Polar liquid crystal

2008-09-23

2008-09-23

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S349000, C549S357000, C549S407000, C546S026000, C546S255000, C544S242000, C544S245000, C544S335000, C349S001000

Reexamination Certificate

active

11695989

ABSTRACT:
Compounds that are useful in compositions for flat panel displays, for example, are provided. The compounds provided are polar, and are useful in low threshold voltage mixtures. The compounds provided have the general structure:CpCOCH2[A]nZ1[B]mZ2PhX1X2Y, where CpCOCH2 is the structure:A and B are independently in each instance selected from the group consisting of 1,4-cyclohexane, 1,4-phenyl, 1,3-dioxan-5,2-diyl; pyridine-5,2-diyl; and pyrimidin-5,2-diyl; n and m are independently in each instance 0, 1 or 2; Z1and Z2are independently a single bond, —(CH2)2—, CF2O, OCF2, CH2O, OCH2, —C≡C—, COO, OOC; and Y is selected from the group consisting of: F, Cl, CN, OCH2F, CHF2, OCF3, and CF3.

REFERENCES:
patent: 3644502 (1972-02-01), Morin et al.
patent: 3769316 (1973-10-01), Hauser et al.

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