| 摘要 |
<p>The present invention is related to a method for polymerizing C4-C40 alpha -olefins alone or with other alpha -olefins in one or more steps using a Ziegler-Natta catalyst composition comprising a procatalyst, in which on a spray-crystallized support formed by a magnesium halide and a lower alcohol is deposited a titanium compound and an internal donor comprising an ester of a carboxylic acid with a long-chain alkyl group, said alkyl group being subjected to transesterification, and a cocatalyst made from a metallic compound of the I-III group of the periodic system of elements, and possibly including an external electron donor compound. The homo- or copolymer obtained by virtue of the method can be used for producing films, sheets, pipes, bottles and large containers. It is also suited for use in lubricating oils as a viscosity-reducing component. Further use of the polymer is found in coating, adhesive and cosmetic product formulas. The polymer is suited for use in different kinds of fuels and oils including such products as candles and similar.</p> |
