Patent ID: 6783812
Filing Date: 2004-08-31
Classification: C07F,C09K

Abstract:
A liquid crystal composition comprising one or more compounds of formula: where D is: where:R1 is an alkyl or alkenyl group having j carbon atoms and R2, R2â€², R3 and R3â€², independently of one another, are alkyl groups having from 1-6 carbon atoms; n1 and m are integers from 1 to about 20; n2 can be zero or an integer from 1 to 20 where the dashed line indicates a possible double or triple bond; k is 0 or an integer from 1 to 10; X is oxygen or a single bond; and j is an integer from 1 to 18; and wherein a, b, x, y, z can be 0 or 1; x+y+z is 1, 2 or 3, when x is 0, a is 0; when z is 0, b is 0; A and B, independently, when present, can be â€”Oâ€”, â€”COOâ€”, â€”OOCâ€”, â€”CH2â€”CH2â€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€”, â€”CH&boxH;CHâ€”CH&boxH;CHâ€”, â€”Oâ€”CH2â€” or â€”CH2â€”O; the A, B and C rings, independently of one another, are aromatic rings or alicyclic rings, where one or two carbons in the A, B or C rings that are aromatic can be replaced with a N, O or S and one or two of the carbons in the A, B or C rings that are alicylic can be replaced with a N; O or S or a C&boxH;O group; provided that the A, B, or C rings are not a 3,4-difluopropyridine ring; Y can represent up to four substituents on aromatic rings and up to 10 substituents on an alicyclic ring where Y can a halogen, CN group, NO2, alkyl or alkoxy; Z is a single bond, an â€”Oâ€” or a â€”COOâ€” or â€”OOCâ€” group, and M is a tail group which can be: a non-fluorinated alkyl, or ether group or RF, where RF is an alkyl, or ether group which is fully or partially fluorinated.