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Propylene polymerization or copolymerization and its multipolymer

A technology of propylene polymerization and copolymerization, which is applied in the field of polymers and can solve unsatisfactory problems

Active Publication Date: 2009-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerization temperature of the embodiments does not exceed 93°C, and the modulus of the obtained propylene homopolymer is improved, but it is still unsatisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Raw materials

[0034] Preparation of catalyst components: according to the catalyst preparation method disclosed in Example 1 of Chinese Patent CN1258683:

[0035] In the reactor fully replaced by high-purity nitrogen, add anhydrous MgCl in sequence 2 4.8g, 95ml of toluene, 4.0ml of epichlorohydrin (ECP) and 12.5ml of tributyl phosphate (TBP), the temperature was raised to 50°C under stirring, and maintained for 2.5 hours, the solid was completely dissolved, and then phthalic anhydride 1.4 g, maintained for another 1 hour, cooled the solution to -25°C, and added TiCl dropwise over 1 hour 4 56ml, the temperature was slowly raised to 80°C, during the heating process, solids were gradually precipitated. 1.6 ml of di-n-butyl phthalate (DNBP) was added, and the temperature was maintained at 80° C. for 1 hour. After filtration, it was washed twice with 100 ml of toluene to obtain a brownish yellow solid precipitate. Then add toluene 60ml, Ticl 4 40ml, treated at 9...

Embodiment 2

[0063] 1) raw material is with embodiment 1

[0064] 2) Experimental device

[0065] The device adopts the continuous combined process of pre-polymerization + horizontal tank gas phase polymerization + horizontal tank gas phase polymerization. The volume of the first prepolymerization reactor is 2 liters, which is a vertical stirred tank with jacket cooling, the stirring is crawler type, and the stirring speed is 500 rpm; the volume of the second horizontal gas phase reactor is 0.2 cubic meters, which is a horizontal type stirred tank, the stirring blade is a T-shaped inclined blade, the inclination angle is 10 degrees, and the stirring speed is 100 rpm; the volume of the third horizontal gas phase reactor is 0.2 cubic meters, which is a horizontal stirring tank, and the stirring paddle is a door Type paddle, stirring speed is 100 rev / min.

[0066] 3) Test conditions

[0067] (1) The first paragraph: pre-polymerization

[0068] The reaction pressure is 2.0MPa, the reaction...

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PUM

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Abstract

Propylene polymerization or copolymerization and its polymer are disclosed. The process contains tree stage polymerization and is carried out by propylene pre-polymerizing at 2-1000g polymer / 1g catalyst, polymerizing at 50-90 degree and polymerizing at 95-150 degree in proportion of 0.3-3. It has excellent particular appearance and its bending modulus is >1.7Gpa and bending strength is >40MPa.

Description

technical field [0001] The present invention relates to a method for propylene polymerization or copolymerization and the polymer obtained by the method. Especially by increasing the temperature of the polymerization reaction and controlling the proportion of each polymerization reaction stage, a propylene polymer with high flexural modulus and high flexural strength can be obtained. Background technique [0002] Polypropylene is a general-purpose plastic with excellent performance. It is the fastest growing variety among the five general-purpose thermoplastics. It is widely used in textiles, packaging, automobile manufacturing, electrical equipment and other civilian consumption fields. With the gradual improvement of the performance of polypropylene, its application will be more extensive. Improving rigidity (or modulus) is one of the current development directions of polypropylene. Polypropylene with higher rigidity can replace some engineering plastics; at the same time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/06C08F2/34
Inventor 李天益吴长江马青山沈贻芳于鲁强宋文波高明智
Owner CHINA PETROLEUM & CHEM CORP
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