Phase transfer catalyzed method for preparation of polyetherimides

US7714095B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Daniel J. Brunelle · Scotia, US
• Havva Acar · Clifton Park, US
• Farid Fouad Khouri · Clifton Park, US
• Thomas Link Guggenheim · Greenwood, US
• David Woodruff · Clifton Park, US
• Norman Johnson · Pittsfield, US

Key dates

• Filing date: Feb 28, 2006
• Grant date: May 11, 2010
• Expiry date: Dec 10, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/124
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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 1,4-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.