申请人:WAKO PURE CHEMICAL INDUSTRIES, LTD.
公开号:US20140378645A1
公开(公告)日:2014-12-25
A problem of the present invention is to provide a liquid crystal aligning agent which never deteriorates even in a method where UV is irradiated such as a liquid crystal dropping method or the like, and is capable of forming a liquid crystal alignment film having high UV resistance.
The present invention relates to,
(I) Compound represented by the following general formula [1]
(wherein n represents an integer of 1 to 6; and R represents an alkyl group having 8 to 20 carbon atoms or a group having a steroid skeleton),
(II) Polyamic acid or a polyimide obtained by a reaction of
(A) compound represented by the above general formula [1], and the following compounds (B) and (C),
(B) compound represented by the following general formula [2],
(wherein R
1
represents an alkyl group having 1 to 6 carbon atoms, or an arylalkyl group having 7 to 12 carbon atoms, p represents an integer of 0 to 4, and Y represents an amino group or a 4-aminophenyl group),
(C) compound represented by the following general formula [3] or [4],
(wherein Z represents a tetravalent hydrocarbon group), along with
(III) Liquid crystal aligning agent comprising the polyamic acid or the polyimide obtained by a reaction of the above compounds (A), (B) and (C).
本发明的问题是提供一种液晶取向剂,即使在诸如液晶滴落法等UV照射的方法中也不会恶化,并且能够形成具有高UV抵抗力的液晶取向膜。本发明涉及以下内容:(I)由下列通式[1]表示的化合物(其中n表示1至6的整数;R表示具有8至20个碳原子的烷基或具有类固醇骨架的基);(II)由化合物(A)和以下化合物(B)和(C)的反应获得的聚酰胺酸或聚酰亚胺;(B)由下列通式[2]表示的化合物(其中R1表示具有1至6个碳原子的烷基或具有7至12个碳原子的芳基烷基;p表示0至4的整数;Y表示氨基或4-氨基苯基);(C)由下列通式[3]或[4]表示的化合物(其中Z表示四价的碳氢基团);以及(III)包括上述化合物(A)、(B)和(C)的聚酰胺酸或聚酰亚胺的液晶取向剂。