Process for the manufacture of low molecular weight polyphenylene ether resins
AssigneeGeneral Electric Company
InventorsAdrianus J. F. M. Braat, Hugo Ingelbrecht, Ruud Trion
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Abstract
The invention relates to a novel process for the manufacture of very low molecular weight polyphenylene ether resin, typically within the intrinsic viscosity range of about 0.08 dl/g to about 0.16 dl/g as measured in chloroform at 25° C. The method preferably comprises 2,6-dimethylphenol as a monovalent phenol species. The invention also relates to the polyphenylene ether resin made by the process as well as blends and articles containing the polyphenylene ether resin made by the process.
Claims17
A process to produce a polyphenylene ether resin having an intrinsic viscosity between about 0.08 dl/g and 0.16 dl/g when measured in chloroform at 25° C., said process comprising oxidative coupling in a reaction solution at least one monovalent phenol species using an oxygen containing gas and a complex metal catalyst to produce a polyphenylene ether resin having an intrinsic viscosity within the range of about 0.08 dl/g to about 0.16 dl/g as measured in chloroform at 25° C.;
- recovering the complex metal catalyst with an aqueous containing solution and isolating the polyphenylene ether resin through devolatilization of the reaction solvent.
A process to produce a polyphenylene ether resin having a glass transition temperature in the range of about 150° C. to about 160° C., said process comprising oxidative coupling in a reaction solution at least one monovalent phenol species using an oxygen containing gas and a complex metal catalyst to produce a polyphenylene ether resin having an intrinsic viscosity within the range of about 0.08 dl/g to about 0.16 dl/g as measured in chloroform at 25° C.;
- recovering the complex metal catalyst with an aqueous containing solution and isolating the polyphenylene ether resin through devolatilization of the reaction solvent.
A process to produce a polyphenylene ether resin having an intrinsic viscosity between about 0.08 dl/g and 0.16 dl/g when measured in chloroform at 25° C., said process comprising oxidative coupling in a reaction solution at least one monovalent-phenol species using an oxygen containing gas and a complex metal catalyst to produce a polyphenylene ether resin having an intrinsic viscosity within the range of about 0.08 dl/g to about 0.16 dl/g as measured in chloroform at 25° C.;
- recovering the complex metal catalyst with an aqueous containing solution and isolating the polyphenylene ether resin through devolatilization of the reaction solvent, wherein the yield of isolated polyphenylene ether resin is over 90% based upon the amount of monovalent phenol utilized.
Dependencies are inferred from the claim text.