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A kind of production method of high-efficiency scratch-resistant polypropylene special material

A production method and scratch-resistant technology, which is applied in the production field of high-efficiency scratch-resistant polypropylene special materials, to achieve remarkable scratch-resistant effects

Active Publication Date: 2018-11-13
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, improving the scratch resistance of the product by improving the production device has not been reported yet.

Method used

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  • A kind of production method of high-efficiency scratch-resistant polypropylene special material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After the catalyst TK (purchased from Shanghai Rongtian Trading Co., Ltd.) is pre-polymerized, it is mixed with the cocatalyst triethylaluminum and the external electron donor dimethyldimethoxysilane (the addition amount of the main catalyst TK is 4.5kg / h, Triethylaluminum 4.3kg / h, external electron donor addition amount 1.1kg / h) add first reactor, reaction temperature 71 ℃, reaction pressure 2.9MPa, reaction time is 0.6hr, H2 / C3=mass ratio is controlled at 0.2‰, then enter the second reactor, close the hydrogen feed valve, the reaction temperature is 65°C, the reaction pressure is 2.5MPa, and the reaction time is 0.7hr, then enter the third gas phase fluidized bed reactor, the reaction temperature is 83°C, the reaction The pressure is 1.8MPa, the reaction time is 1.0hr, and finally enters the fourth gas phase reactor, the reaction temperature is 79°C, the reaction pressure is 1.2MPa, the reaction time is 1.2hr, a small amount (0.5Kg / h) of hydrogen is added appropriately...

Embodiment 2

[0026] After the catalyst ND (purchased from Shanghai Rongtian Trading Co., Ltd.) is pre-polymerized, it is added to the first reactor with the cocatalyst triethylaluminum and the external electron donor dimethyldimethoxysilane, (the addition of the main catalyst ND Amount of 4.3kg / h, triethylaluminum 4.1kg / h, external electron donor addition amount 1.0kg / h) reaction temperature 72 ℃, reaction pressure 2.9MPa, H 2 / C 3 ＝ The mass ratio is controlled at 0.3‰, then enters the second reactor, closes the hydrogen feed valve, the reaction temperature is 66°C, the reaction pressure is 2.5MPa, and then enters the third gas phase fluidized bed reactor, the reaction temperature is 82°C, and the reaction pressure is 1.8MPa , and finally enter the fourth gas phase reactor, the reaction temperature is 80°C, the reaction pressure is 1.2MPa, a small amount (0.4Kg / h) of hydrogen is suitably added, and a compounding assistant containing 2.5wt% organically modified silicone additives is added...

Embodiment 3

[0028] The catalyst CDI and NG (purchased from Shanghai Rongtian Trading Co., Ltd.) (according to 1:1) were first compounded, and then pre-polymerized, and the cocatalyst triisobutylaluminum and the external electron donor trimethylmethoxy Silane is added to the first reactor, (the addition amount of the compound main catalyst is 4.0kg / h, the addition amount of triethylaluminum is 4.1kg / h, and the addition amount of external electron donor is 0.9kg / h). The reaction temperature is 70°C and the reaction pressure is 2.9MPa. h 2 / C 3 ＝ The mass ratio is controlled at 0.3‰, then enters the second reactor, closes the hydrogen feed valve, the reaction temperature is 64°C, the reaction pressure is 2.5MPa, and then enters the third gas phase fluidized bed reactor, the reaction temperature is 83°C, and the reaction pressure is 1.8MPa , and finally enter the fourth gas phase reactor, the reaction temperature is 81°C, the reaction pressure is 1.2MPa, a small amount (0.3Kg / h) of hydrogen...

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Abstract

The invention discloses a production method for an efficient scratch-resistant polypropylene special material. A used reaction device comprises the following reactors, namely a first reactor, a second reactor, a third reactor and a fourth reactor which are connected in series in sequence, wherein the first reactor and the second reactor are liquid-phase reactors; the third reactor and the fourth reactor are gas-phase reactors. The scratch-resistant polypropylene special material resin produced by adopting the method disclosed by the invention has relatively high fluidity, is 10-14g / 10min in melt flow rate, and obvious and long-lasting in scratch-resistant effect, realizes comprehensive improvement of physical and mechanical properties and surface scratch resistance, can be directly applied to the fields of household appliances, automobiles, daily articles and the like with higher requirements for scratch resistance and has the characteristics that the tensile yield strength is larger than or equal to 30MPa, the bending modulus is larger than or equal to 1400MPa, the heat deformation temperature is larger than or equal to 95 DEG C and the Rockwell hardness is larger than or equal to 100.

Description

technical field [0001] The invention relates to a production method of a high-efficiency scratch-resistant polypropylene special material. Background technique [0002] Polypropylene (PP) has been widely used in automobiles, electrical appliances, daily necessities and other fields due to its excellent physical properties, and it has a tendency to expand to new fields. However, the surface of polypropylene is easily scratched by external forces, which greatly affects the appearance of the product, and the scratches on the surface of the product will lead to stress concentration, which limits its application. Therefore, improving the scratch resistance of the surface of the polypropylene composite material will contribute to the further development of the polypropylene material. [0003] Scratching is a way of damage to the surface of a material. Its type and mechanism are quite complex, and there are many influencing factors, such as the molecular structure, crystallinity a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/06C08F4/646C08L23/12
Inventor 魏峰徐振明傅勇
Owner SINOPEC YANGZI PETROCHEM