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:
Sep. 13, 2005
Filed:
Jul. 25, 2003
Werner M. A. Grootaert, Oakdale, MN (US);
Klaus Hintzer, Kastl, DE;
Bernhard Hirsch, Burgkirchen, DE;
Harald Kaspar, Burgkirchen, DE;
Robert E. Kolb, Afton, MN (US);
Gernot Löhr, Burgkirchen, DE;
Werner Schwertfeger, Altoetting, DE;
Werner M. A. Grootaert, Oakdale, MN (US);
Klaus Hintzer, Kastl, DE;
Bernhard Hirsch, Burgkirchen, DE;
Harald Kaspar, Burgkirchen, DE;
Robert E. Kolb, Afton, MN (US);
Gernot Löhr, Burgkirchen, DE;
Werner Schwertfeger, Altoetting, DE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A curable fluoroelastomer composition for preparing a perfluoroelastomer. The composition includes; (1) a perfluoropolymer having one or more cure-sites selected from a halogen capable of participating in peroxide cure reaction and/or nitrile groups; (2) an organic peroxide and/or a compound capable of effecting curing of the perfluoropolymer through said nitrile groups; and (3) optionally a polyunsaturated coagent. The perfluoropolymer in the composition is essentially free of ionic end groups and the total amount of metal cations in the composition is not more than 10 μg/g perfluoropolymer. The perfluoroelastomers may be obtained from curing the composition in a sufficiently low amount of metal cations so as to make the fluoroelastomer suitable for use in the semi-conductor industry.