Process for the production of elastomeric, primari

专利名称：Process for the production of elastomeric,

primarily isotactic polyolefins and catalystsfor use in said process

发明人：Robert C. Job申请号：US07/484314申请日：19900226公开号：US05089573A公开日：19920218

摘要：A process and a catalyst for the production of elastomeric primarily isotacticpolyolefins characterized by short average block lengths wherein olefins are

polymerized in the presence of the catalyst which comprises the reaction product of amagnesium alkoxide and a tetravalent titanium halide which takes place in the presenceof an electron donor, an organoaluminum compound, and a selectivity control agentwhich is an effectively hindered heterocyclic aromatic nitrogen compound wherein thehinderance is provided by a chloro or a methoxy group.

申请人：SHELL OIL COMPANY

代理人：Donald F. Haas

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