公开(公告)号：US3608001A

公开(公告)日：1971-09-21

申请号：US3608001D

申请日：1969-08-26

申请人： EXXON RESEARCH ENGINEERING CO

发明人： KOWALSKI RONALD C ,  HARRISON JOHN W ,  STATON JOHN C ,  KELLER JAMES P

IPC分类号： B29C47/92 ,  B29F3/00

CPC分类号： B29C47/92 ,  B29C47/0014 ,  B29C47/0021 ,  B29C2947/922 ,  B29C2947/92314 ,  B29C2947/92447 ,  B29C2947/92485 ,  B29C2947/92514 ,  B29C2947/92695 ,  B29C2947/92704 ,  B29C2947/92895 ,  B29C2947/92904 ,  B29C2947/92961 ,  C08F8/50 ,  C08F2810/10 ,  C08F110/06 ,  C08F8/06

摘要： A process for producing in a reproducible, predictable and controllable manner a polypropylene having a desired weight average molecular weight and molecular weight distribution by heating the polypropylene in an extruder-reactor, sampling a portion of the polypropylene to measure a parameter of molecular weight and controlling the conditions in the extruder-reactor in response to the measured parameter.

公开(公告)号：US3551943A

公开(公告)日：1971-01-05

申请号：US3551943D

申请日：1966-12-19

申请人： EXXON RESEARCH ENGINEERING CO

发明人： STATON JOHN C ,  KELLER JAMES P ,  KOWALSKI RONALD C ,  HARRISON JOHN W

IPC分类号： B29C47/92 ,  C08F8/06 ,  C08F8/50 ,  B29F3/08

CPC分类号： B29C47/92 ,  B29C47/0014 ,  B29C47/0016 ,  B29C47/0021 ,  B29C47/003 ,  B29C2947/922 ,  B29C2947/92209 ,  B29C2947/92695 ,  B29C2947/92704 ,  B29C2947/92895 ,  B29C2947/92923 ,  C08F8/50 ,  C08F2810/10 ,  C08F8/06 ,  C08F110/06

摘要： A SYSTEM FOR THE CONTROLLED SCISSION OF POLYPROPYLENE COMPRISES AN EXTRUDER-REACTOR, MEANS FOR MEASURING A PARAMETER OF MOLECULAR WEIGHT OF POLYPROPYLENE AFTER PASSING THROUGH THE EXTRUDER-REACTOR, AND FEEDBACK MEANS FOR CHANGING THE CONDITIONS IN THE EXTRUDER-REACTOR IN RESPONSE TO THE PARAMETER OF MOLECULAR WEIGHT MEASURED. THIS SYSTEM MAY CONTAIN A PELLETIZER AND A CONTINUOUS RHEOMETER WHICH MEASURES THE PARAMETER OF MOLECULAR WEIGHT OF THE PELLETIZED POLYPROPYLENE.