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Polypropylene composition and preparation method thereof

A polypropylene composition and propylene polymer technology, applied in the field of new materials, can solve the problems that propylene polymers cannot meet, less surface crystal points, etc., and achieve excellent molding processability and mechanical properties, less crystal points and defects, and the method simple effect

Active Publication Date: 2017-05-24
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: the purpose of the present invention is to solve the problem that the propylene polymer in the prior art cannot satisfy the application in the filter membrane or the lithium battery diaphragm, and provide a kind of low ash (impurity) content, good micropore porosity, and at the same time Polypropylene composition providing good tensile properties, puncture resistance and less surface crystal point defects and preparation method thereof, so as to satisfy applications as filter membranes or lithium battery separators, etc.

Method used

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  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of homopolypropylene:

[0049] The polymerization reaction is carried out in a 10L autoclave (bulk polymerization): inject 2L of liquid propylene into the autoclave that has been purged with hot nitrogen for more than 3 times, add 6ml of cocatalyst triethylaluminum, start stirring, and then inject 2L of liquid propylene ; Add 11 mg of HA catalyst and 30 g of hydrogen, and finally inject 1 L of liquid propylene, flush all the catalyst into the reactor, and close the feed valve. Raise the temperature of the high-pressure polymerization reactor to 70°C within 15 to 20 minutes, then count the time, discharge the residual gas after 2 hours of reaction, and discharge the material to obtain white homopolypropylene powder. After the homopolypropylene powder is fully dried, the total weight of the polymer is weighed to 1040 grams, and the catalytic efficiency of the catalyst is calculated to be 95,000 times.

[0050] Preparation of polypropylene composition:

[005...

Embodiment 2

[0054] Preparation of homopolypropylene:

[0055] The polymerization reaction is carried out in a 10L autoclave (bulk polymerization): inject 2L of liquid propylene into the autoclave that has been purged with hot nitrogen for more than 3 times, add 6ml of cocatalyst triethylaluminum, start stirring, and then inject 2L of liquid propylene ; Add 10 mg of HA catalyst and 70 g of hydrogen, and finally inject 1 L of liquid propylene, flush all the catalyst into the reactor, and close the feed valve. Raise the temperature of the high-pressure polymerization reactor to 70°C within 15 to 20 minutes, then count the time, discharge the residual gas after 2 hours of reaction, and discharge the material to obtain white homopolypropylene powder. After the homopolypropylene powder is fully dried, the total weight of the polymer is weighed to 1180 grams, and the catalytic efficiency of the catalyst is calculated to be 118,000 times.

[0056] Preparation of polypropylene composition:

[00...

Embodiment 3

[0059] Preparation of homopolypropylene:

[0060] The polymerization reaction is carried out in a 10L autoclave (bulk polymerization): inject 2L of liquid propylene into the autoclave that has been purged with hot nitrogen for more than 3 times, add 6ml of cocatalyst triethylaluminum, start stirring, and then inject 2L of liquid propylene ; Add 8 mg of HA catalyst and 150 g of hydrogen, and finally inject 1 L of liquid propylene, flush all the catalyst into the reactor, and close the feed valve. Raise the temperature of the high-pressure polymerization reactor to 70°C within 15 to 20 minutes, then count the time, discharge the residual gas after 2 hours of reaction, and discharge the material to obtain white homopolypropylene powder. After the homopolypropylene powder is fully dried, the total weight of the polymer is weighed to 790 grams, and the catalytic efficiency of the catalyst is calculated to be 99,000 times.

[0061] Preparation of polypropylene composition:

[0062...

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Abstract

The invention discloses a polypropylene composition. The polypropylene composition consists of the following components: 100 parts of a propylene polymer, 0.05 to 0.15 part of a main antioxidant, 0.1 to 0.3 part of an auxiliary antioxidant, 0.01 to 0.05 part of a halogen absorbing agent and 0.05 to 0.3 part of a beta crystal nucleating agent. The invention also discloses a preparation method of the propylene polymer. The preparation method is simple and suitable for large-scale production; a polypropylene microporous film is prepared through melt drawing formation of the polypropylene composition provided by the invention, the microporous film has excellent formation processing performance and mechanical performance, and the film has few crystal points and defects, so that the strict requirements of the film comprising a lithium battery diaphragm can be met; the polypropylene composition can be applied to the polypropylene microporous film manufactured through dry double-drawing pore forming, and the film can be applied in the fields of artificial kidney dialysis membranes, artificial lung membranes, sterile filtering and sterile packaging membranes, lithium battery diaphragms, air purifying membranes, films for water treatment, films for gas separation, food preservative films and the like.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene microporous membrane is a microporous membrane with an average pore size of 0.01 to 10 microns obtained through a special molding method using polypropylene as a raw material. The polypropylene microporous membrane has both the high-efficiency separation ability of a functional membrane and the plastic film Excellent mechanical properties, can completely block various bacteria larger than 0.2-0.5μ and dust above 0.1μ, and even block some larger viruses, so it has been widely used in medicine, batteries, air purification, food industry and even daily life. widely used. [0003] At present, the preparation method of polypropylene microporous membrane is mainly formed by dry process, which can be further divided into uniaxial stretching process and biaxial stretching pr...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K5/00C08K5/134C08K5/526C08K5/098C08K5/20C08F110/06C08F210/06
Inventor 左胜武梅利邱敦瑞徐振明傅勇袁小亮尚小杰
Owner SINOPEC YANGZI PETROCHEM
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