Heterophasic copolymer and metallocene catalyst system and method of producing the heterophasic copolymer using the metallocene catalyst system

Heterophasic copolymer and metallocene catalyst system and method of producing the heterophasic copolymer using the metallocene catalyst system

  • CN 1,972,994 B
  • Filed: 04/07/2005
  • Issued: 01/16/2013
  • Est. Priority Date: 04/20/2004
  • Status: Active Grant
First Claim
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1. multiphase polymer, its mobile value is in 20-80 Grams Per Second scope, described mobile value is to measure multiphase polymer according to ASTMD 1895-96 under room temperature and ambient moisture to estimate by the weight of funnel within a certain period of time, the xylene soluble part content of described multiphase polymer is not more than 15 % by weight, wherein in the first reactions steps under polymeric reaction condition in the presence of supported metallocene catalyst system, make the alkene that is selected from ethene and contains the alpha-olefin of 3-20 carbon atom carry out polymerization with the homopolymer of preparation monomer, in the second reactions steps in the presence of homopolymer matrix in the presence of supported metallocene catalyst system, make one or more olefin comonomers carry out polymerization contains multiphase polymer with formation rubber, wherein said supported metallocene catalyst system loads on the silica supports, and described silica supports to be further defined to its average pore volume be that 1.4-1.8cc/g and average total surface area are at least 311 meters 2/ gram.

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