Poly-2-pyrrolidone prepared with inert drying agent

Details Poly-2-pyrrolidone prepared with inert drying agent Poly-2-pyrrolidone prepared with inert drying agent

1976-01-14

1978-08-01

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528312, 528313, C08G 6924

Patent

active

041042603

ABSTRACT:
Process for polymerizing 2-pyrrolidone in high yield to produce a high molecular weight polymer having the advantageous physical properties of synthetic polymers, such as strength and wear-resistance, and the advantageous chemical properties of cotton, such as water-absorptivity and release, dye-receptivity and similar ironing capability. The process is a hydrogen transfer which is catalyzed by an anion and bone dry carbon dioxide, nitrogen dioxide or sulphur dioxide gas and pushed to high yield with drying agents. Pure anhydrous 2-pyrrolidone is first reacted with an analytical grade alkali metal or its hydroxide or bicarbonate as an anion source to form a mixture comprising 2-pyrrolidone and the metal salt of 2-pyrrolidone; the mixture is then treated with the bond dry CO.sub.2, NO.sub.2 or SO.sub.2 gas as a catalyst to open the ring of the lactam salt; a drying agent is then added; and finally the hydrogen transfer polymerization is accomplished under controlled heating conditions to produce a high yield of polymer.

REFERENCES:
patent: 3017391 (1962-01-01), Motlus et al.
patent: 3681293 (1972-08-01), Jarovitzky et al.
patent: 3682869 (1972-08-01), Jarovitzky
patent: 3683046 (1972-08-01), JAOVITZKY
patent: 3721652 (1973-03-01), Barnes
patent: 3778402 (1973-12-01), Kimura et al.
patent: 3842047 (1974-10-01), Pusztaszeri
patent: 4017465 (1977-04-01), Bacskai
Noble -- The Study of the Polymerization of .alpha.-Pyrrolidone, Doctoral Thesis, 1956, Univ. of Colorado.

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