Patent ID: 6395353
Filing Date: 2002-05-28
Classification: C09K

Abstract:
A liquid crystal composition comprising Component I selected from the group consisting of the compounds represented by formula (I), Component II selected from the group consisting of the compounds represented by formula (II) and Component III selected from the group consisting of the compounds represented by formulas (III-1) and (III-2) wherein each R1 independently represents an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms; each R2 independently represents an alkyl or alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms; Z1 and Z2 represent â€”CH2SiH2â€”, a single bond or â€”CH2CH2â€”, with the proviso that one of Z1 and Z2 represents â€”CH2SiH2â€” and the other represents a single bond or â€”CH2CH2â€”; ring A1 represents a trans-1,4-cyclohexylene group, or a 1,4-phenylene group in which one or more hydrogen atoms may be substituted with fluorine atoms; m is 0 or 1, with the proviso that when m is 0, Z2 represents â€”CH2SiH2â€”; Z3 and Z4 each independently represent a single bond, â€”CH2CH2â€”, â€”CF2Oâ€” or â€”OCF2â€”; rings A2 and A3 represent a tetrahydropyran-2,5-diyl group, a trans-1,4-cyclohexylene group, a cyclohexa-1-ene-1,4-diyl group, or a 1,4-phenylene group in which one or more hydrogen atoms may be substituted with fluorine atoms; n is 0 or 1; with the proviso that when n=0 and Z4 represents a single bond or â€”CH2CH2â€”, then ring A3 represents a tetrahydropyran-2,5-diyl group; when n=0 and Z4 represents â€”CF2Oâ€” or â€”OCF2â€”, then ring A3 represents a trans-1,4-cyclohexylene group or a cyclohexa-1-ene-1,4-diyl group; when n=1 and Z3 and Z4 each independently represent a single bond or â€”CH2CH2â€”, then one of rings A2 and A3 represents a tetrahydropyran-2,5-diyl group; when n=1 and Z3 and/or Z4 represent â€”CF2Oâ€” or â€”OCF2â€”, then rings A2 and A3 represent a trans-1,4-cyclohexylene group, a cyclohexa-1-ene-1,4-diyl group, or a 1,4-phenylene group in which one or more hydrogen atoms may be substituted with fluorine atoms; each R3 independently represents an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms, in which one â€”CH2â€” may be substituted with â€”Oâ€”; ring A4 represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group; ring A5 represents a trans-1,4-cyclohexylene group, or a 1,4-phenylene group in which one or more hydrogen atoms may be substituted with fluorine atoms; p, q and s are each independently 0 or 1 with the proviso that (p+q) is 0 or 1.