Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1979-05-09
1980-09-09
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528126, 528128, 528172, 528179, 528185, 528207, 528208, C08G 7310
Patent
active
042218977
ABSTRACT:
A method is provided for making polyetheramide acid having an intrinsic viscosity in N,N-dimethylacetamide of about 0.05 dl/g to 0.4 dl/g at 25.degree. C. A mixture of aromatic bis(ether dicarboxylic acid) or dianhydride is heated with a substantially equal molar amount of organic diamine in the presence of water and in the substantial absence of an organic solvent. The resulting polyetheramide acid is recovered as a finely divided powder and can be used to make high molecular weight polyetherimide by melt extrusion.
REFERENCES:
patent: 3528937 (1970-09-01), Reynolds
patent: 3575923 (1971-04-01), Jones
patent: 3847867 (1974-11-01), Heath et al.
patent: 3905942 (1975-09-01), Takekoshi et al.
patent: 3983093 (1976-09-01), Williams et al.
patent: 3989670 (1976-11-01), Takekoshi et al.
patent: 4048142 (1977-09-01), Takeoshi
patent: 4073773 (1978-02-01), Banucci et al.
patent: 4087441 (1978-05-01), Lee
patent: 4157996 (1979-06-01), Boldebuck et al.
Thermo-analytical Investigation of Transformation of Polyamido Acid into Polyimide, J. of Applied Poly. Sci., vol. 19, pp. 2335-2345 (1975), Sazanov et al.
Amine Salts of Polypyrromellitamic Acids, J. of Poly. Sci., Reynolds et al., pp. 45-56 (1968).
Davis Jr. James C.
General Electric Company
Lee Lester L.
Teoli William A.
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