The present invention is 3,6-di [4- (n- alkyl) phenyl] pi romel discrete dianhydride and a manufacturing method represented by the following formula (1); Polyimide represented by the following general formula (3) the dianhydride is formed using a unit and a method of manufacturing the same; And relates to a liquid crystal cover element having an alignment film comprising a polyimide, 3,6-di [4- (n- alkyl) phenyl] pi romel discrete dianhydride according to the invention is a polyimide, a polyimide the jopi rolron, cross-linked polyester or is useful as a monomer for the synthesis of polymers such as polyamide, especially as compared to poly conventional aromatic polyimide (pi romel discrete imide) prepared from the dianhydride represented by the formula (1) Since Genie excellent dissolution property in an organic solvent as well as to process directly without passing through the polyamic acid the polyimide precursor, a liquid crystal display device having the alignment layer including the polyimide is excellent in thermal stability of alignment, horizontal excellent alignment properties would be highly useful for the production of a liquid crystal display element and is excellent in a wide viewing angle liquid crystal alignment.; Formula 1; Wherein, R represents an alkyl group of C 1 to C 24.展开▼
