Patent ID: 6689291
Filing Date: 2004-02-10
Classification: C07C,C07D,C09K

Abstract:
A liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, comprising at least one fluorophenylcyclohexene derivative of formula I whereinR is H, an unsubstituted alkyl or alkenyl radical having up to 18 carbon atoms, in which one or more non-adjacent CH2 groups are optionally replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”Oâ€”COâ€”, â€”COâ€”Oâ€” or â€”Câ‰¡Câ€”, X is CN or Qâ€”Y,Y is H, F or Cl, Q is â€”CF2â€”, â€”CHFâ€”, â€”OCF2â€”, â€”OCHFâ€”, â€”OCH2CF2â€”, â€”CH&boxH;CFâ€”, â€”CF&boxH;CHâ€”, â€”CF&boxH;CFâ€”, â€”Oâ€”CF&boxH;CFâ€”, â€”Oâ€”CH&boxH;CFâ€” or a single bond, m is 0 or 1, and n is 0, 1 or 2.