Process for the production of block copolymers of

专利名称：Process for the production of block

copolymers of propylene

发明人：Fujio, Ichiro,Ito, Kaneo,Asanuma, Tadashi申请号：EP87300041.8申请日：19870106公开号：EP0234672A2公开日：19870902

专利附图：

摘要：A block copolymer of propylene is obtained with its quality kept uniform byfirst conducting continuous polymerization of propylene in a polymerization system (A,B), discharging a polymer slurry continuously from the polymerization system (A, B) into a

batchwise polymerization tank (C, or C2), and by feeding ethylene to the tank for

conducting batchwise polymerization therein of ethylene and propylene. Subsequently, acopolymer slurry formed by the preceding batchwise polymerization is discharged,leaving at least a predetermined amount of unreacted ethylene in the tank (C1 or C2).Into the tank with the unreacted ethylene still left therein, are simultaneously chargedpolymer slurry from the polymerization system (A, B) and a deactivator, without

supplying ethylene, and the deactivator charging rate is controlled in such a way that thepartial pressure of ethylene in the vapor phase of the tank always reaches a

predetermined value at the time point of completion of reception of the polymer slurrytherein. After batch polymerization, a polymer slurry is fed to a flash tank (E) whichfunctions to provide the block copolymer in powder form for collection in a receiver (F).

申请人：MITSUI TOATSU CHEMICALS, Inc.

地址：2-5 Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 JP

国籍：JP

代理机构：Harvey, David Gareth

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