06221984 is referenced by 17 patents and cites 20 patents.

Random copolymers of propylene with ethylene and at least one C

4

-C

10

-alk-1-ene, having a melting point, determined by the DSC method, of less than or equal to 135° C., are obtainable by polymerization of propylene, ethylene and at least one C

4

-C

10

-alk-1-ene in the absence of a liquid reaction medium from the gas phase at from 50 to 100° C. and a pressure of from 15 to 40 bar in the presence of a Ziegler-Natta catalyst system comprising

a) a titanium-containing solid component comprising at least one halogen-containing magnesium compound, an electron donor and an inorganic oxide as support,

b) an aluminum compound and

c) a further electron donor compound,

wherein the ratio of the partial pressures of propylene and ethylene is set to from 20:1 to 100:1 and the ratio of the partial pressures of the C

4

-C

10

-alk-1-ene(s) and ethylene is set to from 2.5:1 to 20:1. A process for preparing such random copolymers is also provided, and they can be used in films, fibers or moldings.

Title
Random propylene copolymer
Application Number
9/82056
Publication Number
6221984 (B1)
Application Date
May 21, 1998
Publication Date
April 24, 2001
Inventor
Franz Langhauser
Ruppertsberg
US
Werner Schöne
Schriesheim
US
Meinolf Kersting
Neustadt
US
Agent
Keil & Weinkauf
US
Assignee
BASF Aktiengesellschaft
US
IPC
C08F 4/44
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