Process for making polyetherimides

Details Process for making polyetherimides Process for making polyetherimides

1982-05-25

1983-11-22

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 26, 528125, 528126, 528128, 528172, 528180, 528181, 528182, 528185, 528207, 528208, C08G 7310

Patent

active

044170440

ABSTRACT:
A process for making polyetherimides involving reacting an aromatic bis(ether anhydride) with an organic diamine in an inert solvent to form a prepolymer solvent mixture, effecting solvent removal by thin-film evaporation, and heating the resulting prepolymer to a temperature above the glass transition temperature of the final polyetherimide product and less than 450.degree. C. to form the polyetherimide.

REFERENCES:
patent: 4157996 (1979-06-01), Boldebuck et al.

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