公开(公告)号：US3629174A

公开(公告)日：1971-12-21

申请号：US3629174D

申请日：1970-02-25

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  PERAZZONI PIERLUIGI ,  SILVESTRONI PIER GIORGIO

IPC: C08G69/00 ,  C08G69/04 ,  C08K5/02 ,  C08L77/00 ,  D01F6/90 ,  C08G51/26 ,  C08G51/58 ,  C08G51/62

CPC classification number: C08K5/02 ,  C08L77/00

Abstract: IN THE MANUFACTURE OF POLYAMIDES FOR INDUSTRIAL USES IN GENERAL, SUCH AS FOR THE PRODUCTION OF FIBERS, YARNS MOULDED ARTICLES AND THE LIKE, THE IMPROVEMENT IS HEREIN DISCLOSED, WHICH CONSISTS IN THE CONCURRENT ADDITION OF A STABILIZING COPPER COMPOUND AND OF AN ALLYL HALIDE, IN WHICH THE HYDROGEN ATOM OF THE DOUBLE-BONDED METHYLENE GROUPING IS POSSIBLY SUBSTITUTED BY AN ALIPHATIC RADICAL. ALLYL CHLORDE HAS PROVEN TO BE THE MOST ADVANTAGEOUS IN ITS CLAS. VERY SUPRISINGLY, THE PRESENCE OF AN ALLYL CHLORIDE AS DEFINED ABOVE HAS EXHIBITED AN UNPREDICTABLE ACTIVITY IN NUETRALIZING THE DISCOLOURATION WHICH WOULD BE OTHERWISE EXPERIENCED SHOULD THE COPPER COMPOUND BE USED ALONE. PRODUCTS HAVING AN OUTSTANDINGLY HIGH WHITENESS RATING HAVE BEEN THUS OBTAINED.

公开(公告)号：US3448186A

公开(公告)日：1969-06-03

申请号：US3448186D

申请日：1964-04-13

Applicant: EMILIA MANFREDINI GIACOBONE ,  SNIA VISCOSA

Inventor： NICITA DOMENICO ,  MADERNO CESANO ,  PARMEGGIANI PAOLO ,  PERAZZONI PIERLUIGI ,  GIACOBONE PIERO

IPC: D01D5/08 ,  D01D5/084 ,  D01F6/60 ,  D01D5/10 ,  D02J1/22

CPC classification number: D01D5/084 ,  D01D5/08 ,  D01F6/60