26-03-2014 дата публикации
Номер: CN103665221A
Принадлежит:
The invention relates to a preparation method of a propene polymer composition. The method is characterized in that in the presence of catalyst components and hydrogen, firstly the propene homopolymer is produced in three or more than three reactors, then the propene polymer is produced in a final reactor, the multiple reactors comprise liquid reactors and gas reactors, the reaction temperature of the liquid reactor is 60-85 DEG C, the pressure of the liquid reactor is 2-5 MPa, the reaction temperature of the gas reactor is 70-90 DEG C, the pressure of the gas reactor is 1-3 MPa, the number-average molecular weight of the polymer is not less than the average molecular weight of the homopolymer, the ratio of the melt index of the final polymer and the melt index of the homopolymer is 0.3 to 1.0, and the catalyst component adopts the catalyst disclosed in the patent CN1453298A. The propene polymer composition is fewer in xylene soluble matters, the melt temperature is low, the molecular weight ...
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