Patent ID: 8992796
Filing Date: 2015-03-31
Classification: C08F,C09K,G02B

Abstract:
1. A polymerizable liquid crystal composition comprising: polymerizable liquid crystal compounds; and a photoinitiator having a light absorption band in a wavelength range of 280 to 400 nm, wherein: (i) at least one of the polymerizable liquid crystal compounds has a light absorption band in a wavelength range of 320 to 400 nm, and the difference between the peak wavelength of the light absorption band of the photoinitiator and the peak wavelength of the light absorption band of the at least one polymerizable liquid crystal compound having a light absorption band in the wavelength range of 320 to 400 nm is within 30 nm, or the composition comprises a first photoinitiator having a light absorption band in a wavelength range of 320 to 380 nm and a second photoinitiator having a light absorption band in a wavelength range of 280 to below 320 nm; or (ii) the composition further contains a light-absorbing agent having a light absorption band in a wavelength range of 280 to 400 nm, wherein the light-absorbing agent is a compound represented by general formula (X) where X 1 to X 4 each independently represent a fluorine atom, an alkyl group, alkoxy group, acyl group, or alkoxycarboxy group having 1 to 18 carbon atoms, or an alkenyl group or alkenyloxy group having 2 to 18 carbon atoms; 1 and o each independently represent an integer of 1 to 5; m and n each independently represent an integer of 1 to 4; and L 1 to L 3 each independently represent a single bond or —CH═CH—, but at least two of L 1 to L 3 represent —CH═CH—.