Prepolymerized catalyst components for polymerization of olefins

Prepolymerized catalyst components for polymerization of olefins

  • CN 100,406,476 C
  • Filed: 03/18/1999
  • Issued: 07/30/2008
  • Est. Priority Date: 03/23/1998
  • Status: Active Grant
First Claim
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1. one kind is used for alkene CH 2=CHR polymeric pre-polymerized catalyst components, wherein, R is C 1-C 12Alkyl, it is characterized in that, this component comprises a kind of ingredient of solid catalyst, it comprises the titanium compound and the electronic donor compound capable that have Ti-halogen key at least that is carried on the magnesium dihalide, this component can obtain insoluble 90% the alfon that is higher than in dimethylbenzene under 25 ℃

  • under standard propylene polymerization condition, described ingredient of solid catalyst and ethene carry out prepolymerization, the prepolymerization degree makes the amount of ethylene prepolymer be up to the 100g/g ingredient of solid catalyst, described electronic donor compound capable is selected from monocarboxylic alkyl, cycloalkyl or aryl ester, described alkyl, cycloalkyl or aryl have 1-18 carbon atom, and be selected from 1 of formula (I), 3-diether;

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