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:
Mar. 08, 2011
Filed:
Mar. 24, 2006
Donald Scott Johnson, New York, NY (US);
Daniel Steiger, Clifton Park, NY (US);
Daniel Joseph Brunelle, Burnt Hills, NY (US);
Sean Elliot Armstrong, East Greenbush, NY (US);
Donald Scott Johnson, New York, NY (US);
Daniel Steiger, Clifton Park, NY (US);
Daniel Joseph Brunelle, Burnt Hills, NY (US);
Sean Elliot Armstrong, East Greenbush, NY (US);
Abstract
A polyethersulfone composition is disclosed which comprises structural units derived from bisphenol-A and 4,4'-biphenol, the structural units derived from 4,4′-biphenol being present in an amount corresponding to greater than 65 mole percent based on total moles of structural units derived from diphenolic monomers, wherein the polyethersulfone has a weight average molecular weight (M) of at least 54,000 grams per mole as measured by gel permeation chromatography. The polyethersulfone compositions of the invention display outstanding impact strength as measured using ASTM D256. Surprisingly, the polyethersulfone compositions of the invention show enhanced impact strength relative to known polyethersulfones such as RADEL R, a commercially available polyethersulfone engineering thermoplastic comprised of structural units derived from a dihalodiarylsulfone and 4,4′-biphenol and having a Notched Izod impact strength of about 700 Joules per meter.