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US 6,444,779 B1Granted
Method of preparing a poly(arylene ether), and a poly(arylene ether) prepared thereby
AssigneeGeneral Electric Company
InventorsProbjot Singh, Hugo Gerard Eduard Ingelbrecht, David Parrillo, Mukund Parthasarathy
Life of this patent
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Abstract
A method of preparing a poly(arylene ether) includes oxidatively polymerizing a monohydric phenol in solution, concentrating the solution by removing a portion of the solvent to form a concentrated solution having a cloud point, Tcloud, adjusting the temperature of the concentrated solution to at least about (Tcloud−10° C.), and combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether). The method reduces the formation of undesirably fine particles in the product poly(arylene ether).
Claims43
A method of preparing a poly(arylene ether), comprising:
- oxidatively coupling a monohydric phenol using an oxygen-containing gas in the presence of a solvent and a complex metal catalyst to produce a poly (arylene ether) resin;
- removing a portion of the solvent to produce a concentrated solution having a cloud point, Tcloud;
- adjusting the temperature of the concentrated solution to at least about (Tcloud−10° C.);
- and
- combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether).
2 more elements
A method of preparing a poly(arylene ether), comprising:
- oxidatively coupling a monohydric phenol using an oxygen-containing gas in the presence of a solvent and a complex metal catalyst to produce a poly (arylene ether) resin;
- removing a portion of the solvent to produce a concentrated solution having a cloud point, Tcloud;
- and
- combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether);
- wherein a temperature of at least about (Tcloud−10° C.) is maintained in the poly(arylene ether)-containing solution from the beginning of the concentration step to the moment immediately before the concentrated solution is combined with anti-solvent.
2 more elements
A method of preparing a poly(arylene ether), comprising:
- oxidatively coupling 2,6-dimethylphenol and 2,3,6-trimethylphenol using an oxygen-containing gas in the presence of toluene and a complex copper catalyst to produce a poly(arylene ether) copolymer resin;
- removing a portion of the solvent to produce a concentrated solution having a cloud point, Tcloud;
- and adjusting the temperature of the concentrated solution to a temperature, T, satisfying the inequality T > ( φ s - ( 0.296 × IV + 1.27 × TMP - 35.7 ) 1.97 ( 1 - 0.00795 × IV - 0.0249 × TMP ) - 10 )
- where øS is the polymer concentration (expressed in weight percent), IV is the intrinsic viscosity of the copolymer in chloroform at 25° C. (expressed in mL/g), and TMP is the 2,3,6-trimethylphenol content of the copolymer (expressed in weight %);
- and
- combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether).
3 more elements
A method of preparing a poly(arylene ether), comprising:
- oxidatively coupling 2,6-dimethylphenol and 2,3,6-trimethylphenol using an oxygen-containing gas in the presence of toluene and a complex copper catalyst to produce a poly(arylene ether) copolymer resin;
- wherein the weight ratio of 2,6-dimethylphenol to 2,3,6-trimethylphenol is about 3:1 to about 6:1;
- recovering the complex metal catalyst with an aqueous solution;
- removing a portion of the solvent to produce a concentrated solution comprising about 30 to about 45 weight percent of the poly(arylene ether) copolymer resin and having a cloud point, Tcloud;
- adjusting the temperature of the concentrated solution to at least about (Tcloud+10° C.);
- and
- combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether);
- wherein the precipitated poly(arylene ether) has an intrinsic viscosity of about 0.25 to about 0.50 dL/g;
- and
- wherein the precipitated poly(arylene ether) comprises up to about 15 weight percent of particles smaller than 38 micrometers.
7 more elements
A method of preparing a poly(arylene ether), comprising:
- oxidatively coupling 2,6-dimethylphenol and 2,3,6-trimethylphenol using an oxygen-containing gas in the presence of toluene and a complex copper catalyst to produce a poly(arylene ether) copolymer resin;
- wherein the weight ratio of 2,6-dimethylphenol to 2,3,6-trimethylphenol is about 3:1 to about 6:1;
- recovering the complex metal catalyst with an aqueous solution;
- removing a portion of the solvent to produce a solution having about 30 to about 45 weight percent poly(arylene ether);
- adjusting the temperature of the concentrated solution to at least about 80° C.;
- and
- combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether);
- wherein the precipitated poly(arylene ether) has an intrinsic viscosity of about 0.25 to about 0.40 dL/g;
- and
- wherein the precipitated poly(arylene ether) comprises up to about 15 weight percent of particles smaller than 38 micrometers.
7 more elements
Dependencies are inferred from the claim text.