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:
Feb. 17, 1998
Filed:
Aug. 12, 1996
Galina Mikhailovna Tyul'ga, St. Petersburg, RU;
Olga Borisovna Platonova, St. Petersburg, RU;
Irina Gennadievna Solodkaya, Pushkin, RU;
Dimetrii Stefanovich Rondarev, St. Petersburg, RU;
Yurii Kalmanovich Starobin, St. Petersburg, RU;
Sergey Vasilievich Sokolov, St. Petersburg, RU;
Albertus VanCleeff, Wilmington, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Perfluoroalkylene oxide copolymer having acid fluoride moieties are prepared by reaction of hexafluoropropylene oxide and 1,2-epoxypentafluoropropane 3-fluorosulfate in the presence of a cesium alkoxide initiator. The copolymers may be cured at room temperature and are useful in sealant and coating formulations. Derivatives of the copolymers containing ester, amide, nitrile, and ether moieties are also disclosed.