Albertus Te Te Vancleeff

US Patent:

57392331, Apr 14, 1998

Filed:

Aug 12, 1996

Appl. No.:

8/698554

Inventors:

Sergey Vasilievich Sokolov - St. Petersburg, RU
Valeriya Ivanovna Skoblikova - St. Petersburg, RU
Vitali Iraklievich Purtseladze - St. Petersburg, RU
Tatiana Ivanovna Rabtseva - St. Petersburg, RU
Igor Vladimirovich Kokotin - St. Petersburg, RU
Nadyezhda Yegorovna Chulanova - St. Petersburg, RU
Lev Mikolayevich Senyushov - St. Petersburg, RU
Mikhail Vasilievich Zhuravlev - St. Petersburg, RU
Albertus VanCleeff - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 1820

US Classification:

526245

Abstract:

Low molecular weight copolymers of vinylidene fluoride with fluorinated comonomers having ester functionality are curable at low temperatures to produce elastomers useful as components of heat and corrosion resistant sealants and protective coatings.

US Patent:

57192596, Feb 17, 1998

Filed:

Aug 12, 1996

Appl. No.:

8/698555

Inventors:

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

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C08G 6522

US Classification:

528402

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.