Process for preparing creep-resistant atactic polypropylene copolymer
A technology of random polypropylene and copolymers, which is applied in the field of preparation of random polypropylene copolymer materials, and can solve problems such as sticking to the kettle, difficulty and complexity, and blockage
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[0016] The main catalytic agent is prepolymerized, and then it enters the first liquid phase reactor D-201 to contact with propylene for liquid phase polymerization. A small amount of hydrogen is introduced to control the melt flow rate (MFR) of the polymer, and ethylene is introduced for an appropriate amount. Copolymerization reaction; then the reactants in the first liquid phase reactor D-201 continuously enter the second liquid phase reactor D-202, and continue the copolymerization reaction under the action of hydrogen, propylene, and ethylene, and the resulting slurry then enters The first gas phase reactor D-203, where it undergoes gas phase copolymerization with gas phase propylene, hydrogen, and ethylene, then enters the second gas phase reactor D-204 for gas phase copolymerization with gas phase propylene, hydrogen, and ethylene, and then enters separator D -206 dryer D-207 separates and dries to form the final product polypropylene powder. The control methods of some imp...
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