Process for preparing polyetheramide-acids

Details Process for preparing polyetheramide-acids Process for preparing polyetheramide-acids

1977-04-18

1978-07-04

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604482B, 260516, 260517, 260519, C07D30791

Patent

active

040988007

ABSTRACT:
Disclosed is a process for preparing oligomeric polyetheramide-acid by reacting an aromatic dianhydride component including an aromatic bis(ether anhydride) with an organic diamine in an inert organic liquid selected from methylene chloride, chloroform, 1,2-dichloroethane, and mixtures thereof with acetone. The oligomeric polyetheramide-acid is substantially insoluble in the inert organic liquid, in which the oligomer typically appears as a precipitate which may be recovered in powder or finely divided particulate form without need for grinding.

REFERENCES:
patent: 3847867 (1974-11-01), Heath et al.
patent: 3991004 (1976-11-01), Takekoshi et al.
Dine-Hart et al., J. of Applied Polymer Science, vol. 11, (1967), pp. 609-626.

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