Method for making polyarylene ethers with pyridine catalysts
AssigneeGeneral Electric Company
InventorDwain M. White
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Abstract
A method for making polyarylene ethers is described and the method comprises the step of polymerizing hydroxyaromatic monomers or oligomers prepared therefrom in the presence of pyridine catalysts.
Claims20
A method for making branched polyarylene ethers, said method comprising the step of melt polymerizing at least one first member selected from the group consisting of hydroxyaromatic monomers and oligomers prepared therefrom, in the presence of:
- (a) a catalyst composition comprising at least one second member selected from the group consisting of pyridine and substituted pyridine, in the amount of about 1-50 mole percent based on total moles of said hydroxyaromatic or structural units in said oligomer monomers;
- and
- (b) oxygen, wherein the method is conducted at a temperature of greater than about 100.degree. C. to about 220.degree. C.
A method for making branched polyarylene ethers, said method comprising the step of melt or solvent polymerizing at least one first member selected from the group consisting of 2,6-xylenol, 2,3,6-trimethylphenol and oligomers prepared therefrom, in the presence of:
- (a) a catalyst composition comprising at least one second member selected from the group consisting of pyridine and substituted pyridine;
- and
- (b) oxygen, wherein the method is conducted at a temperature of about 135.degree. C. to about 220.degree. C.
Dependencies are inferred from the claim text.