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:
Oct. 19, 2010
Filed:
Feb. 24, 2004
Dieter Freitag, Chelmsford, MA (US);
Michael A. Vinciguerra, Hampton, NH (US);
Norman Rice, Andover, MA (US);
Richard Lusignea, Allston, MA (US);
Dieter Freitag, Chelmsford, MA (US);
Michael A. Vinciguerra, Hampton, NH (US);
Norman Rice, Andover, MA (US);
Richard Lusignea, Allston, MA (US);
FRX Polymers, Inc., Chelmsford, MA (US);
Abstract
Disclosed are branched polyphosphonates produced using a polycondensation process, that result in polyphosphonates having a Tof at least 100° C., and which can be further processed to have improved hydrolytic stability compared to other polyphosphonates. The method and polyphosphonate compositions may be made from readily available starting materials providing lower cost fire retardant materials. Also disclosed are polymer compositions that comprise these branched polyphosphonates and at least one other polymer, wherein the resulting polymer compositions exhibit flame retardant properties.