公开(公告)号：CA648262A

公开(公告)日：1962-09-11

申请号：CA648262D

Applicant: HOECHST AG

Inventor： WEISSERMEL KLAUS ,  LEDERER MICHAEL

公开(公告)号：FI63245C

公开(公告)日：1983-05-10

申请号：FI771953

申请日：1977-06-22

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  BOUMAN ANTONIUS J M

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F12/00 ,  C08F285/00 ,  C08F291/02 ,  C08F279/02 ,  C08F112/08

Abstract: There is described an improved process for the discontinuous suspension polymerization of alkenyl-aromatic compounds, which comprises re-using the aqueous polymerization medium, after separation of the polymer beads, as the polymerization medium of a subsequent polymerization. Monomer-soluble and water-soluble initiators and, optionally fresh water and dispersing agent, are added. Re-using the aqueous polymerization medium does not negatively affect the color and mechanical properties of the polymer obtained. The process of the invention results in considerable saving of energy.

公开(公告)号：CA1075395A

公开(公告)日：1980-04-08

申请号：CA259017

申请日：1976-08-13

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  STROBEL WOLFGANG

IPC: C08F4/00 ,  C08F2/16 ,  C08F4/28 ,  C08F255/00 ,  C08F255/04 ,  C08F255/06

Abstract: PROCESS FOR PREPARING IMPACT RESISTANT POLYVINYL AROMATICS of the disclosure There is disclosed an improved bulk-suspension process for polymerizing vinyl aromatic monomers in the presence of an ethylene-propylene-nonconjugated diene-rubber, which comprises using, in the suspension polymerization step, peroxy-carbonic esters as the polymerization initiator. The process of the invention yields products having improved notched impact strength, weatherability and elongation at break combined with a good shear stability.

公开(公告)号：CA832508A

公开(公告)日：1970-01-20

申请号：CA832508D

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  SOMMER SIEGFRIED ,  KOCH HEINRICH ,  HARREUS ALBRECHT

公开(公告)号：CA748909A

公开(公告)日：1966-12-20

申请号：CA748909D

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL

公开(公告)号：CA716573A

公开(公告)日：1965-08-24

申请号：CA716573D

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  JENSEN HARALD

公开(公告)号：CA1092294A

公开(公告)日：1980-12-23

申请号：CA281357

申请日：1977-06-24

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  BOUMAN ANTONIUS J M

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F12/00 ,  C08F285/00 ,  C08F291/02 ,  C08F12/04 ,  C08F253/00 ,  C08F279/00

Abstract: There is described an improved process for the discontinuous suspension polymerization of alkenyl-aromatic compounds, which comprises re-using the aqueous polymerization medium, after separation of the polymer beads, as the polymerization medium of a subsequent polymerization. Monomer-soluble and water-soluble initiators and, optionally fresh water and dispersing agent, are added. Re-using the aqueous polymerization medium does not negatively affect the color and mechanical properties of the polymer obtained. The process of the invention results in considerable saving of energy.

公开(公告)号：CA1051582A

公开(公告)日：1979-03-27

申请号：CA221477

申请日：1975-03-05

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  STROBEL WOLFGANG ,  JASTROW HORST

IPC: C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08F283/12 ,  C08F291/00 ,  C08F291/06

Abstract: PROCESS FOR PREPARING IMPACT RESISTANT POLYVINYL AROMATICS of the disclosure The invention relates to novel impact resistant graft copolymers of a vinyl aromatic on an EPTR especially characterized by an improved notched impact strengnth and resistancy to atmospheric corrosion, and a process for their preparation. Said copolymers are obtained by a two-step mass suspension polymerization process characterized by the presence of oxygen, preferably by the presence of air, at a pressure of from 0.05 to 10 atmospheres gauge during the course of the mass polymerization step.

公开(公告)号：AU7881775A

公开(公告)日：1976-09-09

申请号：AU7881775

申请日：1975-03-05

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL ,  STROBEL WOLFGANG ,  JASTROW HORST

IPC: C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08F283/12 ,  C08F291/00 ,  C08F19/04 ,  C08F27/00 ,  C08G31/22

Abstract: The invention relates to novel impact resistant graft copolymers of a vinyl aromatic on an ethylene/propylene/tercomponent rubber especially characterized by an improved notched impact strength and resistance to atmospheric corrosion, and a process for their preparation. Said copolymers are obtained by a two-step mass/suspension polymerization process characterized by the presence of oxygen, preferably by the presence of air, at a pressure of from 0.05 to 10 atmospheres gauge during the course of the mass polymerization step.

公开(公告)号：CA879171A

公开(公告)日：1971-08-24

申请号：CA879171D

Applicant: HOECHST AG

Inventor： LEDERER MICHAEL