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:
Feb. 28, 2017
Filed:
Mar. 25, 2011
Applicant:
Usama E. Younes, McMurray, PA (US);
Inventor:
Usama E. Younes, McMurray, PA (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 75/08 (2006.01); C08K 7/02 (2006.01); B29C 47/76 (2006.01); C08G 18/71 (2006.01); C08G 18/76 (2006.01); C08G 18/48 (2006.01); C08J 5/04 (2006.01); C08G 18/18 (2006.01); B29C 70/44 (2006.01); B29L 31/08 (2006.01);
U.S. Cl.
CPC ...
C08L 75/08 (2013.01); B29C 70/44 (2013.01); C08G 18/1875 (2013.01); C08G 18/482 (2013.01); C08G 18/715 (2013.01); C08G 18/7664 (2013.01); C08J 5/04 (2013.01); B29L 2031/085 (2013.01); C08J 2375/04 (2013.01); Y02P 70/523 (2015.11);
Abstract
A polyurethane-forming system having a viscosity at 25° C. of less than 600 mPas for at least 30 minutes, a gel time at ambient temperature of greater than 60 minutes and a water content of less than 0.06% by weight, based on total system weight, is used to produce composites by a vacuum infusion process. This system makes it possible to produce large composites such as wind turbine blades having excellent physical properties.