Patent US3127484A successfully refreshed from Google Patents.
Patent EP0433990A2 successfully refreshed from Google Patents.
EP0433990A2
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EP
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Process for preparing polypropylene molding compositions
Assignee: Hoechst AG
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Filing: 1990-12-18
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Granted: —
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Expires: 2010-12-18
Abstract
Abstract A propylene block copolymer of high flowability and very good low-temperature toughness is obtained in high yield if the polymerisation of the propylene and the comonomers is carried out using a catalyst comprising a chiral metallocene of the formula I <IMAGE> containing bridges, and an aluminoxane. The polymerisation is carried out in two steps, a crystalline propylene polymer being prepared in liquid monomers in the first step, and a copolymer being prepared in the gas phase in the second step.
Inventors
- 👤 Michael Dr. Schreck
- 👤 Andreas Dr. Winter
- 👤 Walter Dr. Spaleck
- 👤 Hartmut Dr. Kondoch
- 👤 Jürgen Dr. Rohrmann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 20:47
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08F; C08F210/00; C08F210/04; C08F210/06; C08F297/00; C08F297/06; C08F297/08; C08F297/083; C08L23/14; C08L23/142; C08L53/00; C08F110/00; C08F110/04; C08F110/06; C08L23/16; C08L2308/00; C08L2314/00; C08L2314/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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