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:
Oct. 01, 2019
Filed:
Oct. 11, 2017
Ohio Aerospace Institute, Brook Park, OH (US);
U.s. Government, Represented BY the Administrator of the National Aeronautics and Space Administration, Washington, DC (US);
Mary Ann B. Meador, Strongsville, OH (US);
Baochau N. Nguyen, North Royalton, OH (US);
Haiquan Guo, Avon, OH (US);
OHIO AEROSPACE INSTITUTE, Brook Park, OH (US);
U.S. GOVERNMENT AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, Washington, DC (US);
Abstract
Porous cross-linked partially aliphatic polyimide networks are provided. The polyimide networks comprise a polyamic acid oligomer that (i) comprises a repeating unit of a dianhydride and a diamine and terminal functional groups, (ii) has an average degree of polymerization of 10 to 70, (iii) has been cross-linked via a cross-linking agent, comprising three or more cross-linking groups, at a balanced stoichiometry of the cross-linking groups to the terminal functional groups, and (iv) has been chemically imidized to yield the porous cross-linked polyimide network. The polyimide networks are partially aliphatic based on (a) the diamine comprising a first diamine and a second diamine, wherein the first diamine comprises a linear aliphatic backbone chain, and the second diamine does not, and/or (b) the dianhydride comprising a first dianhydride and a second dianhydride, wherein the first dianhydride comprises a linear aliphatic backbone chain, and the second dianhydride does not.