Method for anionic polymerization of alpha-pyrrolidone or alpha-piperidone with quaternary ammonium salts

Assignee: Bpifrance Financement SA

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Filing: 1972-02-14

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Granted: 1974-09-10

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Expires: 1992-02-14

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Abstract

Abstract THE INVENTION PROPOSES NEW CATALYST CONSISTING OF QUATERNNARY AMMONIUM SALTS OF LACTAMS OR ETHER ORGANIC COMPOUNDS HAVING ONE OR MORE HYDROGEN ATOMS OF ACIDIC NATURE AND HAVING PK VALUES RANGING FROM ABOUT 14 TO ABOUT 30, WHICH CATALYSTS ARE OBTAINED BY REACTING QUATERNARY AMMONIUM ALKOXIDES WITH CORRESPONDING LACTAMS OR WEAK ACIDS, AS WELL AS A NEW PROCESS FOR POLYMERIZING OMEGA-LACTAMS, IN PARTICULAR ALPHA-PYRROLIDONE AND ALPHAPIPERIDONE, IN PRESENCE OF THE ABOVE CATALYSTS.

Inventors

👤 H Sekiguchi
👤 P Rapacoulia
👤 B Coutin

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-08 16:20

CPC Classifications

C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24

Claims Analysis

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-09-09	1978-03-11	1978-09-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-09-09	1982-03-11	1982-09-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-09-09	1986-03-11	1986-09-10	$7700.00	Window Closed / Lapsed

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