Fluorinated polycycles and their use in liquid-crystal mixtures

Details Fluorinated polycycles and their use in liquid-crystal mixtures Fluorinated polycycles and their use in liquid-crystal mixtures

2005-10-18

2005-10-18

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299010, C252S299610, C252S299620, C252S299630, C252S299500, C549S457000, C570S187000

Reexamination Certificate

active

06955838

ABSTRACT:
Compounds of the formula (I)where:R1, R2are each independentlya) Hb) -M1-A1-R5c) a straight-chain or branched alkyl radical having from 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having from 2 to 16 carbon atoms, wherec1) one or more nonadjacent and nonterminal CH2groups may be replaced by —O—, —C(═O)O—, —O—C(═O)—, —O—C(═O)—O—, —C(═O)— or —Si(CH3)2—, and/orc2) one CH2group may be replaced by —C≡C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/orc3) one or more hydrogen atoms may be replaced by F and/or Cl,p, q, r are each independently 0 or 1M1—is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH═CH—, —CF═CF—, —C≡C—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(═O)CF═CF— or a single bond,A1is 1,4-phenylene where one or two hydrogen atoms may be replaced by F, Cl, CN and/or OCF3, or up to three hydrogen atoms may be replaced by fluorine, 1,4-cyclohexylene where one or two hydrogen atoms may be replaced by CH3and/or F, 1-cyclohexene-1,4-diyl where one hydrogen atom may be replaced by CH3or F, or 1,3-dioxane-2,5-diyl,R5has the same possible definitions as R1and R2with the exception of -M1-A1-R5,with the provisos that:a) at least one of p, q, r is 1b) R1and R2must not at the same time be Hare used in liquid-crystal mixtures.

REFERENCES:
patent: 6558758 (2003-05-01), Yanai et al.
patent: 100 50 071 (2001-06-01), None
patent: WO 02/055463 (2002-07-01), None
patent: WO 03/010120 (2003-02-01), None
CAPLUS 1997: 352790.
Ichinose et al, High Optical Anisotropy and Small Rotational Viscosity LC Mixture for Field-Sequential Color TN-LCD'S, Abstract LCT4-3, 2000, pp. 77 to 80.

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