公开(公告)号：US3637608A

公开(公告)日：1972-01-25

申请号：US3637608D

申请日：1969-09-25

Applicant: INVENTA AG

Inventor： SCHAAF SIEGFRIED ,  BERTHER CLAU

IPC: C08G69/00 ,  C08G69/18 ,  C08G69/20 ,  C08G20/18

CPC classification number: C08G69/18 ,  C08G69/20

Abstract: THE METHOD RELATES TO THE POLYMERIZATION OF LACTAMS HAVING MORE THAN 6 MEMBER RINGS, AT A TEMPERATURE IN THE RANGE OF 130-180*C. AN ALKALINE POLYMERIZATION CATALYST AND A MIXTURE OF COCATALYSTS IS EMPLOYED IN THE POLYMERIZATION REACTION. THE COCATALYST MIXTURE CONSISTS OF FROM 30-70% OF A HIGH-ACTIVITY COCATALYST COMPRISING ACETYLLACTAMS, ACID CHLORIDES, ACID ANHYDRIDES, CYANAMIDES, ISOCYANATES, KETENES, AND OXAZOLIDINEDIONE DERIVATIVES, AND THE BALANCE CONSISTING OF POLYCARBODIMIDES.

公开(公告)号：US3538060A

公开(公告)日：1970-11-03

申请号：US3538060D

申请日：1969-04-28

Applicant: INVENTA AG

Inventor： SCHAAF SIEGFRIED ,  GAUT PETER S

IPC: C08G69/20 ,  C08G20/12

CPC classification number: C08G69/20

公开(公告)号：US3564599A

公开(公告)日：1971-02-16

申请号：US33960164

申请日：1964-01-23

Applicant: INVENTA AG

Inventor： SCHAAF SIEGFRIED ,  GRIEHL WOLFGANG

IPC: C08G69/16 ,  C08G20/10

CPC classification number: C08G69/16

Abstract: 1. A PROCESS FOR PREPARING A HIGH MOLECULAR WEIGHT POLYAMIDE CAPABLE OF AFTER-POLYMERIZATION IN AN INERT GAS ATMOSPHERE AT TEMPERTURES BELOW ITS MELTING POINT, WHICH COMPRISES POLYMERIZING W-DODECALACTAM BY HEATING UNDER EXCLUSION OF WATER AT TEMPERATURE ABOVE 300*C. IN THE PRESENCE OF A PHOSPHONIC ACID IN THE AMOUNT OF 0.05-1% BY WEIGHT CALCULATED ON THE W-DODECALACTAM.

公开(公告)号：US3536780A

公开(公告)日：1970-10-27

申请号：US3536780D

申请日：1968-06-06

Applicant: INVENTA AG

Inventor： SCHAAF SIEGFRIED ,  GAUT PETER SYDNEY

IPC: C08G69/02 ,  C08G69/36 ,  C08G41/04

CPC classification number: C08G69/36 ,  C08G69/02