摘要:
The present disclosure relates to olefin polymerization catalysts, and discloses a catalyst component for olefin polymerization or copolymerization and a preparation method therefor, and a catalyst and an application thereof. The catalyst component for olefin polymerization or copolymerization in the present disclosure comprises titanium element, magnesium element, an electron donor, an organic silicon polymer, and an inorganic oxide support, wherein the molecular composition of the organic silicon polymer is [R x SiO (4-x)/2 ] m , wherein R is selected from alkyl, aryl, vinyl or oxygen, x is 0 or more and 2 or less, and the value of m makes the number-average molecular weight of the organic silicon polymer be 1×10 3 -1×10 6 g/mol. The catalyst has the characteristics of high activity, good hydrogen-regulating copolymerization performance, high bulk density of resulting polymer powder, and a low content of fine powder in the polymer powder when applied to olefin polymerization, particularly to ethylene and α-olefin polymerization.
摘要:
The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ', M 2 ', M 3 ', M 4 ', M 5 ' and M 6 ' are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, -R 1 and -OR 2 , wherein R 1 and R 2 are each independently a C 1 -C 10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C 1 -C 10 alkoxy and heteroatoms; and wherein, when among M 1 -M 6 and M 1 '-M 6 ', any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R 1 and -OR 2 , the two adjacent groups may optionally be linked to form a ring, with a proviso that M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ', M 2 ', M 3 ', M 4 ', M 5 ' and M 6 ' are not simultaneously hydrogen.
摘要:
The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.