The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2016
Filed:
Apr. 27, 2012
Hideo Suzuki, Funabashi, JP;
Takahiro Noda, Funabashi, JP;
Hideo Suzuki, Funabashi, JP;
Takahiro Noda, Funabashi, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
To provide a polyimide precursor and/or polyimide which has an excellent solubility in various organic solvents, and with which a liquid crystal alignment film can be obtained which is excellent in a rubbing resistance and which is hardly deteriorated even by irradiation with backlight. A polyimide precursor having its terminal amino group modified with at least one alicyclic epoxydicarboxylic acid anhydride selected from the group consisting of compounds of the formulae [1] and [2], or a polyimide obtained by imidizing it: wherein Y is a Calkylene or an oxygen atom, and Ris a hydrogen atom or an organic group represented by —X—X—X, wherein Xis a single bond or —CH—, Xis a single bond or —O—, and Xis a Calkyl group, a Chaloalkyl group or a Calkyl group containing a cyano group.