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MANUFACTURE OF ALPHAAOLEFIN POLYMER OR COPOLYMER HAVING HIGH ISOTACTICITY INDEX
MANUFACTURE OF ALPHAAOLEFIN POLYMER OR COPOLYMER HAVING HIGH ISOTACTICITY INDEX
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机译:具有高等规度指数的α-烯烃聚合物或共聚物的生产
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摘要
A process for making crystalline polymers or copolymers of alpha-olefins containing 3 to 8 carbon atoms, such as polypropylene, by polymerization with a catalyst consisting of a combination of titanium chloride and an organic aluminum compound, in the presence of a stereospecificity additive. This stereospecificity additive is a cyclic polyether of the crown ether type, which may contain sulphur atoms and/or nitro radicals; this additive may be used together with an activator. The process produces polymers or copolymers with a high isotacticity index, while keeping catalyst activity sufficiently high.
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