Quaternary Group VA salt catalyzed method for making polyetherim

Details Quaternary Group VA salt catalyzed method for making polyetherim Quaternary Group VA salt catalyzed method for making polyetherim

1980-09-25

1982-04-13

Welsh, Maurice J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G 7310

Patent

active

043248853

ABSTRACT:
A method is provided for making polyetherimides, based on the use of certain quaternary Group VA salts, for example tetra-alkylammonium halides, to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine under solution or melt polymerization conditions. The resulting polyetherimides are high performance, injection moldable thermoplastics.

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, pp. 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).

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