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:
Jun. 21, 2011
Filed:
Nov. 13, 2007
Axel Hans-joachim Herzog, West Chester, PA (US);
Shaun Raymond Rinehimer, Philadelphia, PA (US);
Axel Hans-Joachim Herzog, West Chester, PA (US);
Shaun Raymond Rinehimer, Philadelphia, PA (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
This invention relates to surfactant compositions comprising a fluorosurfactant and a siloxane surfactant wherein the fluorosurfactant exhibits a disproportionate effect upon the resulting surfactant composition's ability to lower equilibrium surface tension. The fluorosurfactants and siloxane surfactants identified by the present invention exhibit a desirable disproportionate effect from the fluorosurfactant acting upon the resulting surfactant composition's ability to lower equilibrium surface tension. Because of this disproportionate effect, surfactant compositions of the present invention with no more than 21 weight percent fluorosurfactant have nearly identical ability to lower equilibrium surface tensions compared with surfactant compositions having higher amounts of fluorosurfactant. Such a disproportionate effect is desirable because it permits the use of lower amounts of the more costly fluorosurfactant and higher amounts of the less costly siloxane without significantly deteriorating equilibrium surface tension.