Patent ID: 6805920
Filing Date: 2004-10-19
Classification: C09K

Abstract:
A polymerizable liquid crystal compound comprising at least one polymerizable reactive group and showing nematic liquid crystal properties, wherein said compound has a &Dgr;n/n value of 0.14 or more wherein n is average refractive index and &Dgr;n is extraordinary light refractive index (ne) minus ordinary light refractive index (no), and is aligned by application onto an alignment film, and wherein said compound includes a liquid crystal (meth)acrylate compound represented by the general formula (2): wherein R1 to R12 are the same or different and each represent â€”F, â€”H, â€”CH3,â€”C2H5 or â€”OCH3; R13 represents â€”H or â€”CH3; X1 represents a bifunctional group represented by the formula â€”(CH2CH2O)a(CH2)b(O)câ€”wherein a is an integer of 0 to 3, b is an integer of 0 to 12, and c is 0 or 1 provided that when a is an integer of 1 to 3, b is 0 and c is 0 and when a is 0, b is an integer of 1 to 12, and c is 1; and X2 represents â€”CN or â€”F, with the proviso that when X1 is â€”(CH2)2Oâ€”and X2 is â€”CN, not all one of R1 to R12 is â€”H.