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:
Mar. 15, 2022
Filed:
Jan. 15, 2018
Sumitomo Chemical Company, Limited, Tokyo, JP;
Koji Miyamoto, Osaka, JP;
Nozomi Masui, Tsukuba, JP;
Hiroko Sugiyama, Tsukuba, JP;
Katsunori Mochizuki, Tsukuba, JP;
Junichi Ikeuchi, Osaka, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
An object of the present invention is to provide a polyamideimide resin for an optical member having both high flexibility and bending resistance, and in particular, a polyamideimide resin for a front plate of an image display apparatus, and an optical member such as a front plate containing the polyamideimide resin. A polyamideimide resin having constitutional units represented by formula (1) and formula (2): in formula (1) and formula (2), X and Z each independently represent a divalent organic group,Y represents a tetravalent organic group, andat least a part of Z is constitutional unit represented by formula (3): in formula (3), Rto Reach independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and the hydrogen atoms contained in Rto Rmay be each independently substituted with a halogen atom,A represents —O—, —S—, —CO— or —NR—, and Rrepresents a hydrocarbon group having 1 to 12 carbon atoms which may be substituted with a halogen atom,m is an integer of 1 to 4, and* represents a bonding hand.