公开(公告)号：US3773726A

公开(公告)日：1973-11-20

申请号：US3773726D

申请日：1971-07-07

Applicant: DYNAMIT NOBEL AG

Inventor： VOLLKOMMER N ,  KLINKENBERG H ,  TRAUTVETTER W ,  BUENING R

IPC: C08G63/78 ,  C08G17/017

CPC classification number: C08G63/785

Abstract: POLYESTERS IN POWDER FORM ARE PREPARED BY MASS POLYMERIZATION OF BETA-PROPIOLACTONES UTILIZING INTENSIVE MIXING TO PREVENT AGGLOMERATION OF THE POLYMERS AND PROMOTE THE FORMATION OF UNIFORM PARTICLES. THE MIXING IS BEST ACCOMPLISHED USING A HELICAL BAND STIRRER THAT ROTATES IN CLOSE PROXIMITY TO THE REACTOR WALL.

公开(公告)号：US3658768A

公开(公告)日：1972-04-25

申请号：US3658768D

申请日：1970-04-24

Applicant: UNIROYAL INC

Inventor： HARVEY MERLIN P ,  RELYEA DOUGLAS I

IPC: C08G63/82 ,  C08G17/017

CPC classification number: C08G63/823

Abstract: THE INVENTION RESIDES IN A NOVEL CATALYST SYSTEM USED FOR THE POLYMERIZATION OF PIVALOLACTONE. THESE CATALYSTS OR INITATORS ARE PRODUCED FROM POLYBASIC ACIDS AND QUATERNARY AMMONIUM SALTS.

公开(公告)号：US3522219A

公开(公告)日：1970-07-28

申请号：US3522219D

申请日：1967-01-18

Applicant: MONTEDISON SPA

Inventor： CIAPERONI ALDEMARO ,  GECHELE GIOVANNI B

IPC: C08G63/82 ,  C08G17/017

CPC classification number: C08G63/823

公开(公告)号：US3516973A

公开(公告)日：1970-06-23

申请号：US3516973D

申请日：1968-03-25

Applicant: DAICEL LTD

Inventor： KATO RIKITARO ,  NAGATO SYOICHI ,  SUZUKI JURO

IPC: C08G63/82 ,  C08G17/017

CPC classification number: C08G63/823

公开(公告)号：US3476715A

公开(公告)日：1969-11-04

申请号：US3476715D

申请日：1966-06-01

Applicant: DU PONT

Inventor： WAGNER PHILIP LYLE

IPC: C08G63/82 ,  C08G17/017 ,  C08G17/02

CPC classification number: C08G63/823

公开(公告)号：US3468853A

公开(公告)日：1969-09-23

申请号：US3468853D

申请日：1966-06-15

Applicant: AMERICAN CYANAMID CO

Inventor： SCHMITT EDWARD EMIL ,  POLISTINA ROCCO ALBERT

IPC: C08G63/08 ,  D01F6/62 ,  C08G17/017 ,  C08G17/02

CPC classification number: D01F6/625 ,  C08G63/08

公开(公告)号：US3669940A

公开(公告)日：1972-06-13

申请号：US3669940D

申请日：1969-10-09

Applicant: SHELL OIL CO

Inventor： DESGURSE PAUL J A ,  ROGAAR HARM P

IPC: C08G63/78 ,  C08G63/82 ,  C08G17/017

CPC classification number: C08G63/785 ,  C08G63/823

Abstract: Between 50 and 85 per cent of a beta-lactone such as pivalolactone is bulk polymerized in an initial reactor at a maximum temperature of 300* C. The polymerization is then continued in at least one subsequent reactor. Preferably, the reactors are gear pumps.

Abstract translation: 在最初温度为300℃的初始反应器中，大部分聚合了50-85％的β-内酯如新戊内酯。然后在至少一个随后的反应器中继续进行聚合。 优选地，反应器是齿轮泵。

公开(公告)号：US3655631A

公开(公告)日：1972-04-11

申请号：US3655631D

申请日：1969-11-17

Applicant: LAPORTE INDUSTRIES LTD

Inventor： FRASER JAMES R ,  JENKINS VICTOR F

IPC: C08G63/08 ,  C08G63/82 ,  C08G17/017

CPC classification number: C08G63/823 ,  C08G63/08

Abstract: DELTA, EPSILON, AND ZETA LACTONES ARE POLYMERIZED IN THE PRESENCE OF STRONG ORGANIC ACIDS SUCH AS HALOGEN ACTIVATED CARBOXYLIC ACIDS OR SULFONIC ACIDS AS CATALYST AND COMPOUNDS OF THE FORMULA L-CH2OH AS INITIATOR WHEREIN L CONTAINS ETHYLENIC UNSATURATION ACTIVATED BY AMIDE OR ESTER LINKAGES. THE RESULTING TERMINALLY UNSATURATED POLYLACTONES ARE SUITABLE FOR COPOLYMERIZATION WITH ETHYLENICALLY UNSATURATED MONOMERS.

公开(公告)号：US3607841A

公开(公告)日：1971-09-21

申请号：US3607841D

申请日：1968-03-06

Applicant: KANEGAFUCHI SPINNING CO LTD

Inventor： NAKAHARA MASATAKA ,  OGAWA YASUHIRO

IPC: C08G63/08 ,  C08G17/017

CPC classification number: C08G63/08

Abstract: A method of producing poly- Alpha , Alpha -disubstituted- Beta propiolactones by ring-opening polymerizing a compound of the formula wherein R1 and R2 are aryl or alkyl having 1-4 carbon atoms, in the presence of an anionic polymerization catalyst, characterized by conducting the polymerization in the presence of a molecular weight controlling agent selected from the group consisting of acid anhydrides, aldehydes, sulfoxides, organic acids and phenolic compounds in order to control the molecular weight of the polymer.

公开(公告)号：US3578700A

公开(公告)日：1971-05-11

申请号：US3578700D

申请日：1968-03-29

Applicant: SHELL OIL CO

Inventor： KLOOTWIJK ARIE ,  BERGWERF WILLEM ,  WAGNER WILLEM M

IPC: C08G63/82 ,  C08G17/017

CPC classification number: C08G63/823

Abstract: POLY(BETA-LACTONE) PREPOLYMERS HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO 10,000 AND WHICH ARE ESPECIALLY SUITABLE AS INITIATORS FOR THE POLYMERIZATION OF POLY(BETA-LACTONES) ARE PREPARED BY REACTING A BETALACTONE AND PREFERABLY AN ALPHA,ALPHA-DIALKYL-BETA-PROPIOLACTONE WITH A NUCLEOPHILIC AGENT AS HEREINAFTER MORE FULLY DESCRIBED SUCH AS THE TERTIARY PHOSPHINES, IN A MOLAR RATIO OF 20:1 TO 1:40.