Patent ID: 9139777
Filing Date: 2015-09-22
Classification: C08F,C09K

Abstract:
1. A composition of liquid crystal medium, comprising: a negative type liquid crystal material, a stabilizer, one or more than one type of polymerizable monomers capable of forming a polymerization under ultraviolent irradiation and a polymerizable photo-initiator; wherein a structural formula of the polymerizable monomers comprises at least one aromatic ring and at least a polymerizable group connected to the aromatic ring, in case the aromatic ring is a benzene ring, a number of the benzene ring(s) is one or two which the two benzene rings directly connect to each other, or indirectly connect via a group, and in case the aromatic ring is a naphthalene, a number of naphthalene is one; the polymerizable photo-initiator having a structural formula selected from one of following formulas: and in the formula 1˜10, P represents a polymerizable group which is selected from at least one of methacrylate group, acrylate group, vinyl group, ethylene group and epoxy group; n is a number of the polymerizable group(s), n is an integer of 1-3, and in case n is greater than 1, the polymerizable groups are identical or different; X represents a substituent group which is selected from at least one of —F, —Cl, —Br, methyl, —CN and straight-chain or branched-chain alkyl group composed of 2-8 carbon atoms, wherein one or more than one methyl in the branched-chain alkyl group composed of 2-8 carbon atoms can be substituted by an oxygen atom or sulfur atom; m is a number of the substituent group(s) connected to the same aromatic group, m is an integer of 1-3, and in case m is greater than 1, the substituent groups are identical or different; a sum of n plus m is less than groups capable of connecting to the same aromatic ring; in the formula 1-10 represents a substituted or unsubstituted benzene ring or cyclohexane structure, and in case is the substituted benzene ring or cyclohexane structure, the substituent group is the polymerizable group.