发明公开
EP0860452A1 Improved electron donor and catalyst system for monomer polymerization 失效
Verbesserte Electronen-Donor und Katalysatorsystemfürdie Polymerisation von Monomeren

Improved electron donor and catalyst system for monomer polymerization
摘要:
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:
wherein R 1 is alkyl or cycloakylgroup containing at least one secondary or tertiary carbon atom, R 2 and R 3 are each independently alkyl or aryl group, and R 4 is an alkyl group having a primary carbon bonded to the silicon atom; and
C) organic aluminum compound.
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