公开(公告)号：US3627855A

公开(公告)日：1971-12-14

申请号：US3627855D

申请日：1967-09-05

Applicant: BASF AG

Inventor： SCHOTT OTTO ,  BRONSTERT KLAUS ,  ECHTE ADOLF ,  HOFMANN JUERGEN ,  STEIN DIETER

IPC: C08F2/18 ,  C08F279/04 ,  C08F15/04 ,  C08F1/04 ,  C08F1/11

CPC classification number: C08F279/04 ,  Y10S525/924

Abstract: Production of impact-resistant styrene copolymers by polymerizing styrene and acrylonitrile in the presence of butadiene polymers, the bulk of the acrylonitrile being added to the system after a disperse phase has formed from the homogeneous rubber monomers.

公开(公告)号：US3658946A

公开(公告)日：1972-04-25

申请号：US3658946D

申请日：1969-05-08

Applicant: BASF AG

Inventor： BRONSTERT KLAUS ,  BUCHHOLZ KARL ,  ECHTE ADOLF ,  HOFMANN JUERGEN

IPC: C08F291/00 ,  C08F279/02 ,  C08F15/00

CPC classification number: C08F279/02 ,  C08F212/04

Abstract: PROCESS FOR THE PRODUCTION OF IMPACT-RESISTANT POLYMERS BY THE CONTINUOUS POLYMERIZATION OF A SOLUTION OF A DIENE ELASTOMER OR ELASTOMERIC COPOLYMER OF ETHYLENE AND PROPYLENE, THE STARTING MATERIALS BEING FIRST PARTIALLY POLYMERIZED TO SUCH AN EXTENT THAT THE SOLIDS CONTENT OF THE MIXTURE IS 1.1 TO 2 TIMES THE CONTENT OF DIENE ELASTOMER BUT NOT MORE THAN 16% BY WEIGHT, THEN INTRODUCED INTO AN ISOTHERMAL POLYMERIZATION STAGE WHERE A MIXTURE CONTAINING LESS THAN 50% BY WEIGHT OF SOLIDS IS PREPARED AT A TEMPERATURE OF FROM 50* TO 150*C. WHILE MIXING, WHICH MIXTURE IS TOTALLY POLYMERIZED IN THE DOWNSTREAM CONTINUOUS POLYMERIZATION STAGES AT A TEMPERATURE OF UP TO 250*C. TO GIVE A MIXTURE CONTAINING MORE THAN 60% BY WEIGHT OF SOLIDS, AND THEN FREED IN A CONVENTIONAL MANNER FROM VOLATILE CONSTITUENTS.