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. 09, 2007
Filed:
Aug. 06, 2002
Michael C. Dadalas, Eggenfelden, DE;
Rebekka Epsch, Berlin, DE;
Friedrich Kloos, Mainz, DE;
Leonard W. Harvey, Downingtown, PA (US);
Michael C. Dadalas, Eggenfelden, DE;
Rebekka Epsch, Berlin, DE;
Friedrich Kloos, Mainz, DE;
Leonard W. Harvey, Downingtown, PA (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present invention provides a fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol or contains the fluorinated surfactant having a molecular weight of less than 1000 g/mol in an amount of not more than 0.025% by weight based on the total weight of solids in the dispersion. The dispersion further comprises a non-ionic surfactant and an anionic surfactant selected from fluorinated anionic surfactants having a molecular weight of at least 1000 g/mol, non-fluorinated anionic surfactants and mixtures thereof.