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. 01, 2005
Filed:
Oct. 18, 2001
Ernst Poppe, Bernex, CH;
Hans-jurgen Huber, Usingen, DE;
Ralf Hoffmann, Berlin, DE;
Angelo Polese, Falkensee, DE;
Ernst Poppe, Bernex, CH;
Hans-Jurgen Huber, Usingen, DE;
Ralf Hoffmann, Berlin, DE;
Angelo Polese, Falkensee, DE;
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention provides a molded composition having improved noise damping properties, made of a blend of a soft thermoplastic polyether elastomer and a hard polyester resin reinforced with a fibrous or particulate filler, the molded composition having an inhomogeneous structure comprising a surface part which is rich in elastomer and depleted in the polyester resin and the reinforcing filler compared to its inner part, obtained by monocomponent injection molding of a blend of the soft and the hard polyester resin wherein only the polyester resin contains the reinforcing particulate filler. The molded composition has a flex modulus Fm in the range 0.5 to 10 GPa, and maintains a sufficient minimum tan delta damping factor t_ over a temperature range of −50° C. to 170° C.