US 12,404,452 B2
Liquid-crystal medium comprising poylmerizable compounds
Sunny He, Shanghai (CN); Lynne Guo, Shanghai (CN); Shuo (Fisher) Yu, Shanghai (CN); and Yen-Kai Huang, Shanghai (CN)
Assigned to Merck Patent GmbH, Darmstadt (DE)
Filed by Merck Patent GmbH, Darmstadt (DE)
Filed on Jan. 27, 2023, as Appl. No. 18/102,128.
Claims priority of application No. 202210113187.0 (CN), filed on Jan. 30, 2022.
Prior Publication US 2023/0242817 A1, Aug. 3, 2023
Int. Cl. C09K 19/34 (2006.01); C09K 19/54 (2006.01); C09K 19/58 (2006.01); G02F 1/1334 (2006.01)
CPC C09K 19/3491 (2013.01) [C09K 19/542 (2013.01); C09K 19/586 (2013.01); G02F 1/1334 (2013.01); C09K 2019/548 (2013.01)] 22 Claims
 
1. An LC medium having negative dielectric anisotropy and comprising
one or more polymerizable compounds
and
one or more dopants of formula IA

OG Complex Work Unit Chemistry
wherein
alkyl and alkyl* each, independently of one another, denote a C1-6-straight-chain, C3-6-branched or C3-6-cyclic alkyl radical,
and
wherein the total proportion of the one or more dopants of formula IA in the LC medium is 0.05 to 0.3% by weight,
wherein said LC medium has the property of being UV polymerizable and has a UV polymerization time that is reduced compared to a UV polymerization time of an otherwise identical LC medium, but which does not contain the one or more dopants of formula IA, when polymerized under the same conditions as the otherwise identical LC medium.