| 摘要 |
<p>New catalysts for (co)polymerising olefins consist of (A) the reaction prod. of (1) a cpd. of Ti, V or Zr, contg. halogen, or an organic cpd. free from halogen but contg. 0, and (2) a cpd., contg. is not 1 metal M and a halogen, prepd. by decomposing a complex of formula MX2.nAIRX2.pAIX3 to give M dihalide or a prod. contg. M dihalide; in the formula M=Ba, Ca, Mg or Mn; X=Cl or Br in MX2 and AIX3; X=Cl, Br or an alkoxy residue in AIRX2; R= a 1-20C hydrocarbon radical, esp. 1-10C alkoxy, 6-8C cycloalkyl or aryl; n = 1-4; p = 0.1; =n + p=4. Opt, the catalyst also contains (B) an organometallic cpd. of Gp. I, II or III, esp. an alkyl-aluminium. A soln. of the complex in an excess of an alkyl Al dihalide can be used to impregnate a carrier; the transition metal cpd. may be added to the support before or after the complex.</p> |
