Patent ID: 6465059
Filing Date: 2002-10-15
Classification: C09K

Abstract:
A liquid-crystalline medium which is a mixture of polar compounds having positive dielectric anisotropy, comprising at least one compound of formula IA and one or more compounds of formula IB whereR, R* and R** each, independently of one another, are an alkyl or alkenyl radical having from 1 to 12 C atoms which is unsubstituted, singly substituted by CN or CF3 or at least singly substituted by halogen, with the additional option of one or more CH2 groups in these radicals, independently of one another in each case, being replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COâ€”Oâ€”, â€”Oâ€”COâ€” or â€”Oâ€”COâ€”Oâ€” in such a way that O atoms are not directly linked together, and â€ƒeach, independently of one another, are L is H or F, and Y is F, Cl, CN, halogentated alkyl, halogenated alkenyloxy, halogenated alkoxy or halogenated alkenyl having up to 9 C atoms, and z is 1 or 2.