公开(公告)号：US3654238A

公开(公告)日：1972-04-04

申请号：US3654238D

申请日：1969-07-14

Applicant: STAMICARBON

Inventor： KOOIJMAN SEBASTIAAN E M ,  THOMA JOZEF A

IPC: C08G69/42 ,  C08G75/18 ,  C08J7/12 ,  C08G20/38

CPC classification number: C08J7/12 ,  C08G69/42 ,  C08G75/18

Abstract: POLYAMIDE SULPHOXIDES ARE PREPARED BY OXIDIZING POLYAMIDES COMPOSED OF MONOMER UNITS HAVING THE FORMULA (-NH-CO-(CH2)2-S-(CH2)3-) WITH AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE AT ABOUT ROOM TEMPERATURE. POLYAMIDE ARTICLES WHICH HAVE BEEN TREATED ACCORDING TO THE PROCESS OF THE PRESENT INVENTION HAVE VEEN FOUND TO HAVE SUBSTANTIALLY REDUCED SURFACE CHARGE.

公开(公告)号：US3639359A

公开(公告)日：1972-02-01

申请号：US3639359D

申请日：1969-03-21

Applicant: STAMICARBON

Inventor： GARRITSEN JOHAN W ,  KOOIJMAN SEBASTIAAN E M ,  GREGOIRE JOHANNES H C M A ,  VERBRUGGE HENNY

IPC: C08G69/20 ,  C08G20/18

CPC classification number: C08G69/20

Abstract: A PROCESS FOR THE ANIONIC POLYMERIZATION OF LACTAMS IS DISCLOSED, WHEREIN THE LACTAMS ARE POLYMERIZED IN THE PRESENCE OF A CATALYST AND A PROMOTER, WITH THE PROMOTER BEING DI-$-CAPROLACTIM-ETHER-DIHYDROCHLORIDE OR DI-$-CAPROLACTIM-EITHER-MONOHYDROCHLORIDE, WHICH LATTER COMPOUND MAY CONTAIN UP TO 90 MOLE PERCENT OF DI-$-CAPROLACTIM-EITHER. THE PROMOTERS OF THE PRESENT INVENTION ALLOW THE POLYMERIZATION TIME TO BE REDUCED. THE POLYMERIZATION OF LACTAMS PRODUCES USEFUL POLYAMIDES.