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:
Apr. 22, 2008
Filed:
Jul. 12, 2006
Thomas P. Klun, Lakeland, MN (US);
Alan R. Kirk, Cottage Grove, MN (US);
George G. I. Moore, Afton, MN (US);
John C. Clark, White Bear Lake, MN (US);
Zai-ming Qiu, Woodbury, MN (US);
Thomas P. Klun, Lakeland, MN (US);
Alan R. Kirk, Cottage Grove, MN (US);
George G. I. Moore, Afton, MN (US);
John C. Clark, White Bear Lake, MN (US);
Zai-Ming Qiu, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A process for preparing fluorochemical monoisocyanates comprises reacting at least one fluorochemical alcohol represented by the formula CFSONCH(CH)OH, wherein n=2 to 5, and m=2 to 4, with 4,4'-diphenylmethane diisocyanate (MDI) in a solvent in which the resulting fluorochemical monoisocyanate is not soluble; wherein the molar ratio of fluorochemical alcohol:MDI is from about 1:1 to about 1:2.5.