| abstract |
The present invention provides a compound having high chemical stability, high ability to align liquid crystal molecules horizontally, high orientation in a wide range of addition concentrations, appropriate reactivity, and high solubility in liquid crystal compositions etc. at least one characteristic. The present invention provides a compound of the following formula (1). In formula (1), a and b are independently 0, 1 or 2, and 0≦a+b≦3, and ring A 1 , ring A 2 , ring A 3 and ring A 4 are independently, for example, 1,4- Cyclohexylene, Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are independently a single bond or an alkylene group having 1 to 10 carbon atoms, etc. Sp 1 and Sp 2 are independently a single bond or a carbon number 1 to 10 An alkylene group of 10, etc., P 1 and P 2 are independently specific polymerizable groups. |