High-fluidity and high-gloss polypropylene composition and preparation method thereof
A polypropylene composition and high-fluidity technology, applied in the field of high-fluidity and high-gloss polypropylene composition and its preparation, can solve the problems of complicated and expensive modifiers and the like
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[0049] Example 1
[0050] Using propylene as raw material, feed 30 tons per hour, and mix catalyst titanium tetrachloride, carrier MgCl 2 , electron donor isobutyldimethoxysilane and co-catalyst triethylaluminum, add to the loop reactor, feed 2kg of catalyst per hour, control Al / Mg=4, Al / Si=4, control the loop reactor The reaction pressure was 3.4MPa, the reaction temperature was 70°C, and the hydrogen concentration in the reactor was 0.26% to obtain a polypropylene slurry. The polypropylene slurry enters the gas phase reactor, the reaction pressure of the gas phase reactor is controlled to be 1.2MPa, the reaction temperature is 68°C, and the ethylene concentration in the reactor is controlled to 6% to obtain a melt flow rate of 27.6g / 10min and an ethylene-propylene rubber content of 27.6g / 10min. It is 11.8wt%, the ethylene content is 2.9wt%, and the ethylene-propylene rubber particle size distribution is 10-300nm block copolymer polypropylene powder. Weigh 100 parts by weig...
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[0051] Example 2
[0052] Using propylene as raw material, feed 30 tons per hour, and mix catalyst titanium tetrachloride, carrier MgCl 2 , electron donor isobutyldimethoxysilane and co-catalyst triethylaluminum, add to the loop reactor, feed 2kg of catalyst per hour, control Al / Mg=4, Al / Si=4, control the loop reactor The reaction pressure is 3.4MPa, the reaction temperature is 70°C, and the hydrogen concentration in the reactor is 0.25% to obtain a polypropylene slurry. The polypropylene slurry enters the gas phase reactor, the reaction pressure of the gas phase reactor is controlled to be 1.2MPa, the reaction temperature is 68°C, the ethylene concentration in the reactor is controlled to 6.2%, and the melt flow rate is 27.1g / 10min, and the content of ethylene propylene rubber is It is 7.7wt%, the ethylene content is 2.0wt%, and the ethylene-propylene rubber particle size distribution is 10-250nm block copolymer polypropylene powder. Weigh 100 parts by weight of block copol...
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[0053] Example 3
[0054] Using propylene as raw material, feed 30 tons per hour, and mix catalyst titanium tetrachloride, carrier MgCl 2 , electron donor isobutyldimethoxysilane and co-catalyst triethylaluminum, add to the loop reactor, feed 2kg of catalyst per hour, control Al / Mg=4, Al / Si=4, control the loop reactor The reaction pressure is 3.4MPa, the reaction temperature is 70°C, and the hydrogen concentration in the reactor is 0.25% to obtain a polypropylene slurry. The polypropylene slurry enters the gas phase reactor, the reaction pressure of the gas phase reactor is controlled to be 1.2MPa, the reaction temperature is 68°C, the ethylene concentration in the reactor is controlled to 6.4%, and the melt flow rate is 28.7g / 10min. It is a block copolymer polypropylene powder with an ethylene content of 5.2 wt %, an ethylene content of 1.6 wt %, and an ethylene-propylene rubber particle size distribution of 10-200 nm. Weigh 100 parts by weight of block copolymerized polypr...
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