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high pressure polymerization process to form ethylene-based polymer, ethylene-based polymer, composition, article and film
high pressure polymerization process to form ethylene-based polymer, ethylene-based polymer, composition, article and film
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机译:高压聚合工艺以形成基于乙烯的聚合物,基于乙烯的聚合物,组合物,制品和膜
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摘要
A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1.
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