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US Patent 7902316 Polyethersulfone composition, method of making and articles therefrom

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Patent
Patent
1

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
79023161
Patent Inventor Names
Sean Elliot Armstrong1
Daniel Joseph Brunelle1
Daniel Steiger1
Donald Scott Johnson1
Date of Patent
March 8, 2011
1
Patent Application Number
113887101
Date Filed
March 24, 2006
1
Patent Primary Examiner
‌
Duc Truong
1
Patent 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 (Mw) 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.

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