Patent ID: 8399068

Claim:
A liquid crystal aligning agent comprising a reaction product of a compound of formula (1) and at least one selected from the group consisting of a polysiloxane having structural units of formula (S-1) and formula (S-3), a hydrolysate of the polysiloxane and a condensate of the hydrolysate of the polysiloxane; wherein said polysiloxane having structural units of formula (S-1) and formula (S-3), said hydrolysate of the polysiloxane and said condensate of the hydrolysate of the polysiloxane is obtained by copolymerizing a mixture of a silane compound of formula (S-1-1) and a silane compound selected from the group consisting of tetramethoxysilane, tetraethoxysilane, methyl trimethoxysilane, methyl triethoxysilane, phenyl trimethoxysilane and phenyl triethoxysilane in the presence of an alkali metal compound or an organic base: wherein Y I of formula (S-1) is a hydroxyl group, an alkoxyl group having 1 to 10 carbon atoms, an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 10 carbon atoms, R of formula (1) is a group comprising a structure of formula (2) and further comprising an alkyl group with 4 to 20 carbon atoms, a fluoroalkyl group with 1 to 20 carbon atoms, a cyclohexyl group, or a group comprising 17 to 51 carbon atoms and a steroid skeleton, and X I of formula (S-1) and Z of formula (1) react with each other to form a bonding group between the silicon atom of formula (S-1) and R of formula (1); wherein X III of formula (S-3) is a methoxy group, an ethoxy group, a methyl group, an or a phenyl group; Y III of formula (S-3) is a methoxy group or an ethoxy group; with the proviso that when X III is a methoxy group or an ethoxy group, Y III is the same as X III ; wherein X I and Y I of formula (S-1-1) are as defined in formula (S-1), Y′ is an alkoxyl group having 1 to 10 carbon atoms or a halogen atom, and n is an integer of 1 to 3; wherein d of formula (2) is an integer of 0 to 4, and each asterisk represents an atomic bonding.