Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-10-19
1992-02-04
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526132, 526133, 526150, 526909, 526153, 526160, 526348, 526902, C08F 202, C08F 4602, C08F21016
Patent
active
050861344
ABSTRACT:
The invention relates to a process for the preparation of a predominantly crystalline ethylene/propylene copolymer having less than 15 mol % of propylene units, which can be carried out in liquid propylene as the suspending agent, if metallocene catalyst components of the formulae I, II or III are employed and the partial pressures of ethylene and propylene have a specific ratio. ##STR1## By means of this process, it is possible to increase the possible uses of polymerization plants which work with liquid propylene.
REFERENCES:
patent: 4542199 (1985-09-01), Kaminsky et al.
patent: 4794096 (1988-12-01), Ewen
patent: 4871705 (1989-10-01), Hoel
patent: 4952540 (1990-08-01), Kioka et al.
Antberg Martin
Luker Hartmut
Rohrmann Jurgen
Spaleck Walter
Winter Andreas
Hoechst Aktiengesellschaft
Smith Edward J.
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