Patent ID: 7413782

Claim:
A compound of a formula (1): wherein, in formula (1), Q 1 to Q 4 each independently represent a formula (2), a hydrogen atom, a halogen atom, or an alkyl group having from 1 to 30 carbon atoms; in the alkyl group, any —CH 2 — may be substituted with —O—, —S—, —COO—, —OCO—, —CH═CH— or —C≡C—, and any hydrogen may be substituted with a halogen atom; at least two of Q 1 to Q 4 are the formula (2) and may differ from each other; in formula (2), A independently represents a 1,4-cyclohexylene group, a 1,4-phenylene group, a 1,4-cyclohexenylene group, a pyridine-2,5-diyl group, a pyridazine-3,6-diyl group, a pyrimidine-2,5-diyl group, a bicyclo[2.2.2]octane-1,4-diyl group, a naphthalene-2,6-diyl group, a tetrahydronaphthalene-2,6-diyl group, a decalin-2,6-diyl group, or a 1,3-dioxane-2,5-diyl group; any hydrogen in these rings may be substituted with a halogen atom, an alkyl group having from 1 to 3 carbon atoms, or a fluoroalkyl group having from 1 to 3 carbon atoms; X independently represents a single bond, or an alkylene group having from 1 to 20 carbon atoms; any —CH 2 — in the alkylene group may be substituted with —O—, —S—, —COO— or —OCO—, and any hydrogen therein may be substituted with a fluorine atom; Z represents a single bond, —COO—, —OCO—, —CH 2 CH 2 —, —(CH 2 ) 4 —, —CH 2 O—, —OCH 2 —, —(CH 2 ) 3 O—, —O(CH 2 ) 3 —, —CF 2 CF 2 —, —CH═CH—, —CH═CHCH 2 CH 2 —, —CH 2 CH 2 CH═CH—, —CH═CHCH 2 O—, —OCH 2 CH═CH—, —CF═CF—, —C≡C—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 CF 2 O—, —OCF 2 CH 2 CH 2 —, —CH 2 CH 2 COO—, —OCOCH 2 CH 2 —, —CH═CHCOO—, —OCOCH═CH—, —C≡CCOO— or —OCOC≡C—; n indicates an integer of from 0 to 3; when n is 1, 2 or 3, then plural A's may be the same or different; when n is 2 or 3, then plural Z's may be the same or different; P represents any one of polymerizing groups of formulae (P1) to (P8); W represents a hydrogen atom, a halogen atom, an alkyl group having from 1 to 3 carbon atoms, or a fluoroalkyl group having from 1 to 3 carbon atoms; provided that when Q 1 and Q 2 are both hydrogen atoms and when Q 3 and Q 4 are both formula (2), then P must not be (P8); provided that when P is (P5) and X is an alkylene group having from 1 to 20 carbon atoms, then the —CH 2 — of the alkylene group directly bonded to P must not be substituted with —O—; provided that when Q 1 and Q 2 are both hydrogen atoms, Q 3 and Q 4 are both formula (2), the X directly bonded to the binaphthalene ring is —OCO—, n=0, A is a 1,4-phenylene group, the X directly bonded to P is —O(CH 2 ) 4 OCH 2 — and P is (P2), then W must not be ethyl.