申请人:Saigusa Kazuhiko
公开号:US20060222784A1
公开(公告)日:2006-10-05
In order to obtain such a liquid crystal thin film having optical anisotropy that suffers less change in optical characteristics thereof under heating to 200° C., the following polymerizable liquid crystal composition is provided as a raw material therefor. The composition contains Compound (1) and at least one of Compound (2) and Compound (3), with a proportion of Compound (1) being from 50 to 99% by weight, a proportion of Compound (2) being from 0 to 50% by weight, and a proportion of Compound (3) being from 0 to 50% by weight:
wherein R is alkyl; each of W
1
and W
2
is independently hydrogen, chlorine, fluorine or —CH
3
; each of W
3
and W
4
is independently hydrogen, chlorine, fluorine, —CH
3
or —CF
3
; W
5
is alkyl having, alkoxy, chlorine, fluorine, —CN or —OCF
3
; X is a single bond, —CH═CH— or —CH
2
CH
2
—; Z is a single bond, —COO—, —OCO— or —CH
2
CH
2
—; and q is an integer of from 1 to 20.
为了获得具有光学各向异性的液晶薄膜,在加热至200℃时其光学特性变化较小,以下可聚合液晶组合物被提供作为其原材料。该组合物含有化合物(1)和化合物(2)和/或化合物(3)中的至少一种,其中化合物(1)的比例为50至99重量%,化合物(2)的比例为0至50重量%,化合物(3)的比例为0至50重量%。其中R为烷基; W1和W2分别为氢、氯、氟或—CH3; W3和W4分别为氢、氯、氟、—CH3或—CF3; W5为烷基、烷氧基、氯、氟、—CN或—OCF3; X为单键、—CH═CH—或—CH2CH2—; Z为单键、—COO—、—OCO—或—CH2CH2—; q为1至20的整数。