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. 18, 2005
Filed:
Mar. 13, 2002
Robert John Cavanaugh, Hilton Head Island, SC (US);
Clay Woodward Jones, Washington, WV (US);
Kazuo Konabe, Shimizu, JP;
Daniel N. Levy, Collex, CH;
Philippe Andre Fernand Thomas, Helecine, BE;
Theodore A. Treat, Washington, WV (US);
Robert John Cavanaugh, Hilton Head Island, SC (US);
Clay Woodward Jones, Washington, WV (US);
Kazuo Konabe, Shimizu, JP;
Daniel N. Levy, Collex, CH;
Philippe Andre Fernand Thomas, Helecine, BE;
Theodore A. Treat, Washington, WV (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.225 and about 2 to about 11 weight % surfactant based on the weight of said fluoropolymer comprising a compound or mixture of compounds of the formula:R(OCHCH)OHwherein R is a branched alkyl, branched alkenyl, cycloalkyl, or cycloalkenyl hydrocarbon group having 8-18 carbon atoms and n is an average value of 5 to 18. The fluoropolymer particles of the dispersion comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. Preferably, the aqueous dispersion composition comprises about 45 to about 65 weight % non-melt-processible fluoropolymer particles.