Inhibitor for the polymerization of a 2-isocyanatoalkyl ester of

Details Inhibitor for the polymerization of a 2-isocyanatoalkyl ester of Inhibitor for the polymerization of a 2-isocyanatoalkyl ester of

1980-12-15

1982-07-06

Sever, Frank

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

For inhibiting or preventing a polymerization reaction

260453SP, 260453PH, B01D 334

Patent

active

043381626

ABSTRACT:
Nitrogen oxides have been found to be effective to inhibit during distillation the vinyl polymerization of a 2-isocyanatoalkyl ester of an unsaturated carboxylic acid. For example, crude 2-isocyanatoethyl methacrylate was sparged with nitric oxide in nitrogen gas during distillation at 90.degree. C., so as to effect a concentration of nitric oxide in the gas phase of 376 parts per million by weight. Essentially pure 2-isocyanatoethyl methacrylate was recovered in 70 percent yield.

REFERENCES:
patent: 3964978 (1976-06-01), Watson
patent: 3964979 (1976-06-01), Watson
J. F. Villa et al., Syn. React. Inorg. Metal-Org. Chem., 6(1), pp. 59-63, (1976).

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