公开(公告)号：ZA846824B

公开(公告)日：1985-05-29

申请号：ZA846824

申请日：1984-08-31

Applicant: HOECHST AG

Inventor： DORRER BERNHARD ,  STRAMETZ HELMUT

IPC: C08F4/10 ,  C08F4/16 ,  C08F297/08 ,  C08L23/12 ,  C08L23/14 ,  C08F

Abstract: A polypropylene molding composition with a good hardness and good impact strength at low temperatures is formed by two-stage polymerization of propylene and ethylene in liquid propylene in the presence of a special supported catalyst.

公开(公告)号：AU530075B2

公开(公告)日：1983-06-30

申请号：AU4805279

申请日：1979-06-14

Applicant: HOECHST AG

Inventor： MAYER GUNTER ,  FISCHER EBERHARD ,  STRAMETZ HELMUT

IPC: C08F6/00 ,  C08F6/06 ,  C08F6/28 ,  C08F10/06 ,  C08F6/24 ,  C08J11/00 ,  C08J11/02

Abstract: During the recovery of the unreacted propylene from the mother liquor obtained in the polymerization of liquid propylene, the major part of the propylene is evaporated in a first evaporation step at a low temperature and the remaining part is evaporated in a second evaporator at a high temperature. In this way an early agglomerization of the atactic and/or low-molecular weight polymer dissolved in the mother liquor and fouling of the heat exchanger tubes and/or of the column trays is avoided.

公开(公告)号：AU529274B2

公开(公告)日：1983-06-02

申请号：AU5268179

申请日：1979-11-09

Applicant: HOECHST AG

Inventor： DORRER BERNHARD ,  KLOOS FRIEDRICH ,  NEUMANN HORST ,  STRAMETZ HELMUT

IPC: C08L23/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08F4/64 ,  C08F110/06

Abstract: A polypropylene molding composition of polypropylene, ethylene-propylene copolymer and polyethylene having a high hardness and increased impact strength and homogeneity after processing is obtained by way of a continuous three-stage polymerization, when the melt viscosities of the polymer mixtures obtained in the individual stages are in a determined ratio of one to the other.

公开(公告)号：CA1102048A

公开(公告)日：1981-05-26

申请号：CA285227

申请日：1977-08-22

Applicant: HOECHST AG

Inventor： STRAMETZ HELMUT ,  RUST KURT

IPC: C08F210/00 ,  C08F210/06 ,  C08F210/16

Abstract: PROPYLENE-TERPOLYMERS of the disclosure: A polypropylene having a strongly reduced melting temperature and improved optical properties is obtained by copolymerization of propylene with small quantities of ethylene and butene-(1).

公开(公告)号：CA1064010A

公开(公告)日：1979-10-09

申请号：CA221178

申请日：1975-02-28

Applicant: HOECHST AG

Inventor： RUST KURT ,  SCHROTT ERWIN ,  STRAMETZ HELMUT ,  KABLITZ HANS-JURGEN

IPC: C08F4/00 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00

Abstract: Process for the manufacture of a catalyst of the disclosure: A catalyst of high activity and stereospecificity in .alpha.-olefin, polymerization is obtained when titanium trichloride, prepared from titanium tetrachloride by reduction with an aluminum alkyl halide, is thermally treated, first with an ether in the presence of a cyclopolyene and the solid reaction product is then treated with an aluminum alkyl halide in the presence of a small amount of a cyclopolyene and/or an olefin. With the catalyst obtained high spacetime yields of .alpha.-olefin polymers and copolymers can be produced.

公开(公告)号：AU7863775A

公开(公告)日：1976-09-02

申请号：AU7863775

申请日：1975-02-27

Applicant: HOECHST AG

Inventor： RUST KURT ,  SCHROTT ERWIN ,  STRAMETZ HELMUT ,  KABLITZ HANS-JURGEN

IPC: C08F4/00 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00 ,  C08F1/56 ,  C08F3/10

Abstract: A catalyst of high activity and stereospecificity in alpha -olefin polymerization is obtained when titanium trichloride, prepared from titanium tetrachloride by reduction with an aluminum alkyl halide, is thermally treated, first with an ether in the presence of a cyclopolyene and the solid reaction product is then treated with an aluminum alkyl halide in the presence of a small amount of a cyclopolyene and/or an olefin. With the catalyst obtained high space-time yields of alpha -olefin polymers and copolymers can be produced.