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Propylene polymer and preparation method thereof

A technology of propylene polymers and compounds, applied in the field of propylene polymers, can solve the problems of increasing the cost of polypropylene resins, problems in product separation, etc.

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Those skilled in the art know that the use of metallocene catalysts will increase the cost of polypropylene resins, and most of the catalysts are homogeneous catalysts, and there are also problems in the separation of products.

Method used

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  • Propylene polymer and preparation method thereof

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preparation example Construction

[0028] The present invention also provides a method for preparing a propylene polymer, the method comprising: under olefin polymerization conditions, in the presence of a catalyst, propylene or propylene and ethylene and / or selected from C 4 -C 8 A mixture of α-olefins is polymerized, the catalyst contains a solid component, an alkylaluminum compound and optionally an external electron donor compound, the solid component comprising the reaction product of the following components:

[0029] (i) magnesium compound, described magnesium compound is the magnesium compound shown in formula (1) or formula (2);

[0030] (ii) at least one titanium compound;

[0031] (iii) at least one internal electron donor; and

[0032] (iv) oxirane compounds represented by formula (3),

[0033] (R 1 O) m MgT n Formula (1), MgX k (R 4 Oh) p (H 2 O) q Formula (2),

[0034] Formula (3),

[0035] Among them, T is

[0036] R 1 and R 4 the same or different, each independently as C 1 ...

preparation example 1

[0140] This preparation example is used to illustrate the catalyst component for olefin polymerization provided by the present invention and its preparation method.

[0141] (1) In a 1.6L reactor, add 200mL No. 5 white oil (Sigma-Aldrich Company), 8.0g (0.084mol) magnesium chloride, 6g surfactant span80 (Sigma-Aldrich Company), 100mL (1.70mol) ethanol in sequence , under stirring, the temperature was raised to 90°C. After reacting at constant temperature for 1 hour, the resulting mixture was stirred and dispersed for 30 minutes for emulsification. And add 25mL (0.32mol) epichlorohydrin in the obtained emulsification product, maintain temperature reaction 0.5 hour, carry out pressure filtration then, filter off liquid, wash 5 times with hexane, vacuum-dry, obtain magnesium compound A1, through infrared spectrum Law and 1 H-NMR method is measured, and magnesium compound A1 structural formula is as follows formula (8) expression (R 1 is ethyl, R 2 for hydrogen, R 3 is chloro...

preparation example 2

[0145] This preparation example is used to illustrate the catalyst component for olefin polymerization provided by the present invention and its preparation method.

[0146] (1) The magnesium-containing compound is prepared according to the disclosed method of Example 1 in CN1718595A, specifically as follows:

[0147] In a stirred 150L reactor, 10kg (105mol) of magnesium chloride and 12.6kg (273mol) of ethanol were added into 60L of white oil with a viscosity of 30 centipoise (20°C) and reacted at 125°C for 2 hours. Then transfer the mixture of molten adduct and white oil to the medium of methyl silicone oil which has been preheated to 125°C; the viscosity of methyl silicone oil is 300 centipoise (20°C), and the amount of methyl silicone oil is 120L ; Stir at a speed of 200 rpm for 10-30 minutes to obtain a mixed solution. Introduce the mixed solution into a high-gravity rotating bed for dispersion, and introduce the dispersed mixed solution into a hexane medium that has been...

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Abstract

The present invention provides a propylene polymer and a preparation method thereof, the number average molecular weight of the propylene polymer is 3 *10<4> to 5 * 10<4>, the molecular weight distribution index is 3-8, and the isotactic index is 70-95%. The preparation method of the propylene polymer is as follows: under olefin polymerization conditions, in the presence of a catalyst, propylene or a mixture of propylene and ethylene and / or an alpha olefin selected from C4-C8 are polymerized, the catalyst comprises a solid component, an alkyl aluminum compound and an optional external electron donor compound, the solid component comprises the following reaction product components: (i) a magnesium compound shown as a formula (1) or (2); (ii) at least one titanium compound; (iii) at least one internal electron donor; and (iv) an oxirane compound shown as a formula (3). The preparation method can be used for preparing polypropylene with low isotactic index and high molecular weight.

Description

technical field [0001] The invention relates to a propylene polymer, a preparation method of the propylene polymer and a propylene polymer prepared by the method. Background technique [0002] As we all know, according to the three-dimensional structure of the methyl side chain in the polymer chain, polypropylene homopolymer can be divided into isotactic polypropylene, syndiotactic polypropylene and atactic polypropylene. Among them, isotactic polypropylene products have good mechanical properties and have been widely used. [0003] Atactic polypropylene is a polypropylene with a low isotactic index. Atactic polypropylene is also widely used because of its good adhesion, excellent hydrophobicity, chemical resistance, electrical insulation, adhesion and good compatibility. It can be used to make waterproof membranes and adhesives made of modified petroleum asphalt, and make self-adhesive films, used as vacuum grease thickeners, lubricating oil modifiers, anti-oil mist addit...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F4/645
Inventor 凌永泰夏先知刘月祥李威莅高富堂赵瑾张纪贵谭扬彭人琪高平张天一张志会
Owner CHINA PETROLEUM & CHEM CORP
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