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US 8,507,636 B2Granted
High molecular weight poly(2,6-dimethyl-1,4-phenylene ether) and process therefor
AssigneeSabic Innovative Plastics IP B.V.
InventorsErik Rene Delsman, Gert-Jan Schoenmakers
Life of this patent
Estimating the term…
Abstract
A poly(2,6-dimethyl-1,4-phenylene ether) having a high molecular weight and a reduced content of low molecular weight species can be prepared by a method that includes specific conditions for the oxidative polymerization, chelation, and isolation steps. The poly(2,6-dimethyl-1,4-phenylene ether) is particularly useful for the fabrication of fluid separation membranes.
Claims6
A poly(2,6-dimethyl-1,4-phenylene ether) solid having
- a number average molecular weight of 20,000 to 40,000 atomic mass units,
- a weight average molecular weight of 150,000 to 400,000 atomic mass units, and
- 10 to 30 weight percent of molecules having a molecular weight less than 30,000 atomic mass units.
Dependencies are inferred from the claim text.