申请人:JAPAN SYNTHETIC RUBBER CO., LTD.
公开号:EP0735403A1
公开(公告)日:1996-10-02
A liquid crystal aligning agent contains
(1) at least one polymer selected from the group consisting of a polyamic acid obtainable by a reaction between a tetracarboxylic acid dianhydride and a diamine compound and an imidized polymer obtainable by cyclization with dehydration of the polyamic acid;
(2) at least one first solvent selected from the group consisting of N-alkyl-2-pyrrolidones, lactones, and 1,3-dialkyl-2-imidazolidinones;
(3) at least one second solvent selected from the group consisting of:
(a) a first compound represented by general formula (I)
wherein R1 is an alkylene group having 2 or 3 carbon atoms; R2 is an alkyl group having 1 to 4 carbon atoms an acetyl group or a propionyl group; R3 is an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, or a halogen atom; a is 1 or 2; and b is 0 or integers of from 1 to 5; and
(b) a second compound represented by general formula (II)
wherein R4 is an alkyl group having 1 to 4 carbon atoms; R5 is an alkylene group having 2 or 3 carbon atoms; R6 is an alkyl group having 1 to 3 carbon atoms; and c is 1 or 2.
液晶对准剂包含
(1) 至少一种聚合物,选自由四羧酸二酐和二胺化合物反应生成的聚氨基 酸和聚氨基酸脱水环化生成的亚胺化聚合物组成的组;
(2) 至少一种第一溶剂,选自由 N-烷基-2-吡咯烷酮、内酯和 1,3-二烷基-2-咪唑烷酮组成的组;
(3) 至少一种第二溶剂,选自由下列物质组成的组
(a) 通式 (I) 所代表的第一种化合物
其中 R1 是具有 2 或 3 个碳原子的亚烷基;R2 是具有 1 至 4 个碳原子的烷基、乙酰基或丙酰基;R3 是具有 1 至 3 个碳原子的烷基、具有 1 至 3 个碳原子的烷氧基或卤原子;a 是 1 或 2;b 是 0 或 1 至 5 的整数;以及
(b) 通式(II)代表的第二种化合物
其中 R4 是具有 1 至 4 个碳原子的烷基;R5 是具有 2 或 3 个碳原子的亚烷基;R6 是具有 1 至 3 个碳原子的烷基;以及 c 是 1 或 2。