Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-09-19
1982-05-18
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 21, 528173, C08G 7310
Patent
active
043306667
ABSTRACT:
A method is provided for making polyetherimides based on the use of certain amphoteric catalysts such as hydroxy pyridines or aminocarboxylic acids to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine or prepolymer thereof under solution or melt polymerization conditions.
REFERENCES:
patent: 3847870 (1974-11-01), Takekoshi
patent: 3850885 (1974-11-01), Takekoshi et al.
patent: 3998840 (1976-12-01), Williams et al.
4--Dialkylaminopyridines as Highly Active Acylation Catalysts, Hofle et al., Angew. Chem. Int. Ed. Engl. 17, 569-583, (1978).
Structural Effects on the Rates of Formation of Amic Acids and Imides, Dror et al., J. Chem. Soc., Perkin II, 1425, (1974).
NASA Tech Brief, PB80-972160, ARC-11107, Improved Imide Polymerization Catalyst.
A Study of Base-Catalyzed and Salt-Catalyzed Acetylation of Hydroxyl Groups, Schenk et al., Anal. Chem., 34, 914-919, (1964).
Preparation of Acyclic Imides, Hurd et al., J. of Org. Chem., vol. 24, pp. 388-392, (1959).
Cyclization of Aromatic Polyamido Acids to Polyimides, Lavrov et al., Chemical Abstracts, vol. 87, (1977), p. 4.
A Case History of Transmuting an Idea into Money, M. Orchin., J. of Chem. Education, p. 782.
The Preparation of Phthalamic Acids and Their Conversion into Anthranilic Acids, Chapman et al., J. Chem. Soc. 127, 1791, (1925).
Keyes David G.
White Dwain M.
Davis Jr. James C.
General Electric Company
Teoli William A.
Welsh Maurice J.
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