摘要 |
Polyether polymers, such as polyetherimides, are prepared by the reaction of a dihydroxy-substituted aromatic hydrocarbon alkali metal salt, such as bisphenol A disodium salt, with a bis(N-(chlorophthalimido))aromatic compound, such as 1,3- and/or l,4-bis(N-(4-chlorophthalimido))benzene, in a solvent such as o-dichlorobenzene and in the presence of a phase transfer catalyst such as a hexaalkylguanidinium chloride. Several embodiments may be employed to improve the method. They comprise employing substantially dry reagents, employing a high solids level in solvent, beginning with an excess of bis(N-(chlorophthalimido))- aromatic compound and incrementally adding alkali metal salt, employing alkali metal salt of small particle size, and using reagents of high purity. |
申请人 |
GENERAL ELECTRIC COMPANY;BRUNELLE, DANIEL, JOSEPH;ACAR, HAVVA, YAGCI;KHOURI, FARID, FOUAD;GUGGENHEIM, THOMAS, LINK;WOODRUFF, DAVID, WINFIELD;JOHNSON, NORMAN, ENOCH |
发明人 |
BRUNELLE, DANIEL, JOSEPH;ACAR, HAVVA, YAGCI;KHOURI, FARID, FOUAD;GUGGENHEIM, THOMAS, LINK;WOODRUFF, DAVID, WINFIELD;JOHNSON, NORMAN, ENOCH |