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. 15, 2008
Filed:
Mar. 30, 2004
Applicants:
Ravi R. Vedula, North Ridgeville, OH (US);
Yinbing Xia, Beijing, CN;
Inventors:
Ravi R. Vedula, North Ridgeville, OH (US);
Yinbing Xia, Beijing, CN;
Assignee:
Lubrizol Advanced Materials, Inc., Cleveland, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
D01D 5/08 (2006.01); C08G 18/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
Thermoplastic polyether polyurethane polymers are disclosed which are mixed with a non-polyether crosslinking agent to achieve long run times in a melt spinning process to make elastic fibers. The crosslinking agent is preferably a polyester polyol reacted with a diisocyanate. A melt spinning process is also disclosed using a polyether polyurethane with a polyester crosslinking agent. Long melt spinning run times can be achieved without experiencing excessive pressure buildup in the spinneret and fiber breakage.