High molecular weight poly(2,6-dimethyl-1,4-phenylene ether) and process therefor
First Claim
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1. A poly(2,6-dimethyl-1,4-phenylene ether) solid havinga 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, andto 30 weight percent of molecules having a molecular weight less than 30,000 atomic mass units.
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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.
22 Citations
6 Claims
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1. 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 to 30 weight percent of molecules having a molecular weight less than 30,000 atomic mass units.
Specification
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Current AssigneeSHPP Global Technologies BV
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Original AssigneeSabic Innovative Plastics IP BV (Government of Saudi Arabia)
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InventorsDelsman, Erik Rene, Schoenmakers, Gert-Jan
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Primary Examiner(s)Truong, Duc
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Application NumberUS13/205,131Publication NumberTime in Patent Office736 DaysField of Search528/86, 528/396, 528/212US Class Current528/212CPC Class CodesC08G 65/4093 characterised by the proces...C08G 65/44 by oxidation of phenolsC08G 65/485 Polyphenylene oxidesY10T 428/2975 Tubular or cellular
