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, 2022
Filed:
Mar. 26, 2020
Agc Inc., Chiyoda-ku, JP;
Takeshi Yamada, Chiyoda-ku, JP;
Toshifumi Kakiuchi, Chiyoda-ku, JP;
Aya Serita, Chiyoda-ku, JP;
Masahide Yodogawa, Chiyoda-ku, JP;
AGC Inc., Chiyoda-ku, JP;
Abstract
To provide a fluorinated elastic copolymer composition such that solubility of a fluorinated elastic copolymer in a solvent is excellent, the solvent is easily removed, and the solvent is easily available. A fluorinated elastic copolymer composition comprising a fluorinated elastic copolymer having units based tetrafluoroethylene and units based on CF=CFOR(wherein Ris a Cperfluoroalkyl group), and a fluorinated solvent having a perfluorohydrocarbon group, wherein the perfluorohydrocarbon group having the largest number of carbon atoms in the fluorinated solvent has from 3 to 7 carbon atoms, the fluorinated solvent has a boiling point of from 50 to 160° C., and the fluorinated solvent has a fluorine atom content (fluorine atom content (mass %)=(19× number of fluorine atoms in the fluorinated solvent/molecular weight of the fluorinated solvent)×100) of from 69 to 80 mass %.