Method of making polyetherimide
AssigneeSabic Global Technologies B.V.
InventorsTHOMAS LINK GUGGENHEIM, NITIN VILAS TOPLE, KARTHIK VENKATARAMAN
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Abstract
A method of making a polyetherimide comprises: combining a bisphenol A dianhydride, p-phenylene diamine and a halogenated aromatic solvent to form a reactant solution; heating the reactant solution to a temperature of 205° C. to 330° C. at a pressure sufficient to prevent boiling to afford a reaction solution; removing water from the reaction solution; maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling for 10 minutes to 5 hours to form a product mixture comprising the polyetherimide and solvent; and isolating the polyetherimide.
Claims24
A method of making a polyetherimide comprising:
- combining a bisphenol A dianhydride, p-phenylene diamine and a halogenated aromatic solvent to form a reactant solution;
- heating the reactant solution to a temperature of 205° C. to 330° C. at a pressure sufficient to prevent boiling to afford a reaction solution;
- removing water from the reaction solution;
- maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling for 10 minutes to 5 hours to form a product mixture comprising the polyetherimide and solvent;
- and
- isolating the polyetherimide.
A method of making a polyetherimide comprising:
- combining bisphenol A dianhydride and a halogenated aromatic solvent to form a reactant solution;
- heating the reactant solution to a temperature of 205° C. to 330° C. at a pressure sufficient to prevent boiling,
- adding p-phenylene diamine to the heated pressurized reactant solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling to form a reaction solution;
- maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling to afford a product mixture comprising the polyetherimide and solvent;
- and
- isolating the polyetherimide.
4-5. (canceled)
8-9. (canceled)
A method of making a polyetherimide comprising:
- combining a bisphenol A dianhydride, p-phenylene diamine and a halogenated aromatic solvent to form a reactant solution;
- heating the reactant solution to reflux and removing water to afford a reaction slurry;
- heating the reactant slurry to a temperature of 205° C. to 330° C. at a pressure to afford a reaction solution;
- removing water from the reaction solution;
- maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling for 10 minutes to 5 hours to form a product mixture comprising the polyetherimide and solvent;
- and
- isolating the polyetherimide.
14-16. (canceled)
(canceled)
Dependencies are inferred from the claim text.