Polar liquid crystal

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

Reexamination Certificate

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Details

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

Reexamination Certificate

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07427693

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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