METHODS OF MANUFACTURE FOR POLYETHERIMIDE

A method of making polyetherimide includes: reacting a diamine having four bonds between the amine groups, 4-halophthalic anhydride and 3-halophthalic anhydride at an imidization reaction temperature and pressure in the presence of a solvent and a polymer additive to produce a mixture including 3,3′...

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Bibliographische Detailangaben
Hauptverfasser:	KUHLMAN, Matthew L, JOHNSON, Peter, PATIL, Dadasaheb V
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A method of making polyetherimide includes: reacting a diamine having four bonds between the amine groups, 4-halophthalic anhydride and 3-halophthalic anhydride at an imidization reaction temperature and pressure in the presence of a solvent and a polymer additive to produce a mixture including 3,3′-bis(halophthalimide), 3,4′-bis(halophthalimide), 4,4′-bis(halophthalimide), solvent, and the polymer additive wherein the molar ratio of 3-halophthalic anhydride to 4-halophthalic anhydride is 95:05 to 60:40; reacting the mixture with an alkali metal salt of a dihydroxy aromatic compound to produce a polyetherimide having a cyclics content less than 6 weight percent, based on the total weight of the polyetherimide, a glass transition temperature greater than or equal to 220° C., and a weight average molecular weight greater than or equal to 25,000 Daltons; wherein the polymer additive dissolves in the solvent at the imidization reaction temperature and pressure.