US Patent 7217780 Polyether ketone and method of producing the same

Patent 7217780 was granted and assigned to Mitsui Chemicals on May, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Mitsui Chemicals

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7217780

Date of Patent

May 15, 2007

Patent Application Number

10498096

Date Filed

December 10, 2002

Patent Primary Examiner

‌

Duc Truong

Patent abstract

There are disclosed, a polyether ketone having a primary particle size of 50 μm or less; and a method of producing a polyether ketone by a desalting polycondensation, which contains a step of conducting a polymerization reaction under a condition of deposition of the polymer. The polyether ketone obtained by the present invention has small particle size, high molecular weight and sufficiently small content of impurities such as alkali metal components.