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:
May. 17, 2016
Filed:
Mar. 18, 2010
Kenichi Fukukawa, Sodegaura, JP;
Tatsuhiro Urakami, Sodegaura, JP;
Yoshihiro Sakata, Sodegaura, JP;
Wataru Yamashita, Sodegaura, JP;
Masaki Okazaki, Sodegaura, JP;
Kenichi Fukukawa, Sodegaura, JP;
Tatsuhiro Urakami, Sodegaura, JP;
Yoshihiro Sakata, Sodegaura, JP;
Wataru Yamashita, Sodegaura, JP;
Masaki Okazaki, Sodegaura, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
Provided is a low-cost polyimide, containing cyclohexane diamine as a diamine unit, that has a low thermal expansion coefficient. Said block polyimide contains blocks having the repeating structural unit shown in formula (1A) and blocks having the repeating structural unit shown in formula (1B). This block polyimide is preferably obtained by imidizing a block polyamide acid imide that contains blocks having the repeating structural unit shown in formula (2A) and blocks having the repeating structural unit shown in formula (2B).