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. 12, 2020
Filed:
Dec. 17, 2015
Applicant:
Rhodia Operations, Paris, FR;
Inventor:
Thomas Ternisien, Villeurbanne, FR;
Assignee:
RHODIA OPERATIONS, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 73/10 (2006.01); C08G 69/26 (2006.01);
U.S. Cl.
CPC ...
C08G 73/1032 (2013.01); C08G 69/26 (2013.01); C08G 73/1028 (2013.01); C08G 73/1082 (2013.01);
Abstract
The invention relates to a process for producing an aromatic polyimide, comprising the following steps: (a) preparing one or more salt(s) by reacting one or more aromatic tetracarboxylic acid(s) in the solid state and one or more diamine(s), optionally in the presence of one or more chain limiter(s), in the presence of one or more binder(s), comprising one or more organic liquid(s), in an amount of from 1% to 25% by weight relative to the total weight of the aromatic tetracarboxylic acid(s), of the diamine(s) and of the optional chain limiter(s), then; (b) polymerising the salt(s) obtained in step (a).