Process for the preparation of polyterephthaloyl-and polydipheny

Details Process for the preparation of polyterephthaloyl-and polydipheny Process for the preparation of polyterephthaloyl-and polydipheny

1978-01-20

1980-06-17

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

264178F, 264205, 528208, 528336, 528342, C08G 6932, C08G 7300

Patent

active

042085098

ABSTRACT:
A process for the production of high molecular weight, fiber- and film-trimming polyterephthaloyl oxalamidrazone and polydiphenylether-4,4'-dicarboxylic acid oxalamidrazone where a solution of pure terephtaloyl chloride or diphenyl-ether-4,4'-dicarboxylic acid dichloride in an inert solvent free from amines and water is slowly added, at a temperature between 10.degree. C. and 35.degree. C., to a solution of pure oxalic acid bisamidrazone in dimethyl acetamide and/or N-methyl pyrrolidone, free from amines and water, containing 4 to 6 percent by weight of anhydrous lithium chloride, the total quantity of the solvents used amounting to 1.25 to 3.30 liters per mole of oxalic acid bisamidrazone.

REFERENCES:
patent: 3544528 (1970-12-01), Magerlein et al.
patent: 3560452 (1971-02-01), Schulze et al.
patent: 3560453 (1971-02-01), Schopf et al.
patent: 3718625 (1973-02-01), Wallrabenstein et al.
patent: 3876586 (1975-04-01), Wallrabenstein et al.

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