| 摘要 |
<p>Provided is process of polymerizing monomer having at least one Ziegler-Natta polymerizable bond, comprising contacting monomer with, reacting monomer in presence of, or combinations thereof, catalyst system comprising: A) catalyst component consisting essentially of i) about 1.5 weight % to about 6 weight % titanium, ii) about 10 weight % to about 20 weight % magnesium, iii) about 40 weight % to about 70 weight % halogen, iv) about 5 weight % to about 25 weight % polycarboxylic ester selected from the group consisting of esters aliphatic, aromatic, alicyclic polycarboxylic acids, or combinations thereof or alkyl phthalates, and v) about 0.1 weight percent to about 2.5 weight % organic phosphorous compound selected from the group consisting of hydrocarbon esters of phosphoric acid such that each hydrocarbon group has one to about six carbon atoms; B) electron donor described by the formula: <CHEM> wherein R1 is alkyl or cycloakylgroup containing at least one secondary or tertiary carbon atom, R2 and R3 are each independently alkyl or aryl group, and R4 is an alkyl group having a primary carbon bonded to the silicon atom; and C) organic aluminum compound. CH</p> |
