Copolyetherimides and phase catalyzed method for their preparati

Details Copolyetherimides and phase catalyzed method for their preparati Copolyetherimides and phase catalyzed method for their preparati

1997-10-06

1999-06-01

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528 26, 528126, 528128, 528171, 528172, 528173, 528174, 528175, 528179, 528182, 528185, 528188, 528214, 528215, 528219, 528220, 528229, 528350, 528351, 528352, 528353, C08G 802, C08G 7300, C08G 6926, C08G 7500

Patent

active

059089156

ABSTRACT:
Copolyetherimides are prepared by the reaction of an alkali metal salt of a dihydroxyaromatic compound with a bis(substituted phthalimide) and a third compound which may be a substituted aromatic ketone or sulfone or a macrocyclic polycarbonate or polyarylate oligomer. The reaction takes place the in presence of a solvent and a phase transfer catalyst having high thermal stability, such as a hexaalkylguanidinium halide. Random or block copolymers may be obtained, depending on the reaction conditions.

REFERENCES:
patent: 5229482 (1993-07-01), Brunelle

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