Solvent free or sinterable polyetheramide acid reaction product

Details Solvent free or sinterable polyetheramide acid reaction product Solvent free or sinterable polyetheramide acid reaction product

1978-05-15

1980-04-08

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, 528179, 528185, 528188, 528207, C08G 7310

Patent

active

041973968

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.

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