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Process for the preparation of a catalytic composition for the polymerization of alpha-olefins, catalytic composition obtained and polymerization process using such a catalytic composition
Process for the preparation of a catalytic composition for the polymerization of alpha-olefins, catalytic composition obtained and polymerization process using such a catalytic composition
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机译:制备用于聚合α-烯烃的催化组合物的方法,获得的催化组合物和使用这种催化组合物的聚合方法
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摘要
Disclosed is for the preparation of a catalytic composition for the polymerization of alpha-olefins. The catalyst comprises a compound of a transition metal (i) of Groups 4 to 6 of the Periodic Table, containing at least one possibly substituted cyclopentadiene ligand, and an activator (ii) chosen from aluminoxanes and ionizing agents supported on a support (iii) consisting of porous particles of polyolefin(s). Preparation includes a preliminary polymerization which includes contact with an alpha-olefin, under polymerizing conditions, in a diluent whose kinematic viscosity, measured at 20 C., is from 3 to 3000 cSt (centistokes) from 3 to 3000 mm2/s, such as mineral oil which may be derived from coal tars and petroleum fractions, to form from 0.01 to 50 g of polyolefin per g of catalyst containing compounds (i), (ii) and (iii).
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机译:公开了用于制备用于α-烯烃聚合的催化组合物。该催化剂包含周期表第4-6族的过渡金属(i)的化合物,其包含至少一种可能被取代的环戊二烯配体,以及活化剂(ii),其选自负载在载体(iii)上的铝氧烷和电离剂。由聚烯烃的多孔颗粒组成。制备包括预聚合,该预聚合包括在聚合条件下在稀释剂中与α-烯烃接触,该稀释剂在20℃下测得的运动粘度为3-3000 cSt(厘oke)为3-3000 mm Sup 2每升含化合物(i),(ii)和(iii)的催化剂,例如矿物油(可能源自煤焦油和石油馏分),形成0.01至50 g聚烯烃。
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