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Polyolefin alloy material and preparation method thereof

An alloy material and polyolefin technology, applied in the field of new polyolefin materials, can solve the problems of long polybutene crystal transformation time and narrow polymerization temperature window.

Active Publication Date: 2015-05-13
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the purposes of the present invention is to address the performance defects of the current single polyolefin examples, such as long polybutene crystal transformation time, high isotactic polybutene is very easy to dissolve in the butene monomer and the polymerization temperature window is too high. Narrow, providing a new polybutene material with a wide polymerization temperature window and rapid crystal transformation; the second purpose of the present invention is to provide a two-stage polymerization synthesis method for polyethylene / high isotactic polybutene alloy materials; The third object of the invention is to provide a novel polyolefin alloy material; the fourth object of the present invention is to provide a polyolefin material with a good particle shape in the kettle; the fifth object of the present invention is to provide a Catalyst preparation method of polyethylene / high isotactic polybutene alloy

Method used

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  • Polyolefin alloy material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0049] 1L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced with high-purity nitrogen several times, then metered and added triethylaluminum (Al) and external electron donor diphenyldimethoxysilane (Si ) and MgCl 2 Loaded TiCl 4 Catalyst (Ti content 2.5 wt.%) 0.25g, add ethylene 0.05Kg, wherein Al / Ti=50 (molar ratio), Al / Si=10 (molar ratio). 60 oC Stir the polymerization for 5 minutes, then lower the temperature and evacuate ethylene under reduced pressure, add 0.2Kg of butene-1 to the reactor, react at 30°C for 6 hours, and obtain 140g of powdery polymer directly after the drying is terminated. The properties of the alloy are shown in Table 1.

Embodiment 2

[0051] 1L fully enclosed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then metered 100ml of hexane, triethylaluminum (Al), and external electron donor cyclohexyltrimethoxysilane into the reaction kettle (Si) and MgI 2 Loaded TiCl 4 Catalyst (Ti content 2.5 wt.%) 0.25g, add ethylene 0.05Kg, wherein Al / Ti=80 (molar ratio), Al / Si=20 (molar ratio). 70 oC Stir and polymerize for 10 minutes, then lower the temperature and evacuate ethylene and hexane under reduced pressure, add 0.2Kg of butene-1 to the reactor, react at 35°C for 8 hours, and obtain 180g of powdery polymer directly after the drying is terminated. The properties of the alloy are shown in Table 1.

Embodiment 3

[0053] 10L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced with high-purity nitrogen for several times, then metered and added 150ml of heptane, triethylaluminum (Al), and external electron donor diphenyl dimethoxide into the reaction kettle Silane (Si) and SiO 2 Load VlCl 3 Catalyst (V content 3.3 wt.%) 1.0g, add ethylene 0.5Kg, wherein Al / V=50 (molar ratio), Al / Si=20 (molar ratio). 60 oC Stir the polymerization for 20 minutes, then lower the temperature and empty the ethylene and solvent heptane, add 3.5Kg of butene-1 to the reactor, react at 40°C for 8 hours, and obtain 3.9Kg of powdered polymer directly after drying. The properties of the polybutene alloy are shown in Table 1.

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Abstract

The invention discloses a polyolefin alloy material and a preparation method thereof, belongs to the field of polyolefin materials and in particular relates to a polyethylene / highly isotactic polybutene alloy material and a preparation method thereof. According to the polyethylene / highly isotactic polybutene alloy material disclosed by the invention, the mass content of polybutene is 10-98.9 percent (the isotacticity is more than 85 percent), the mass content of polyethylene is 1-80 percent, and the mass content of a butane-ethylene copolymer is 0.1-10 percent. By utilizing the supported titanium and / or vanadium catalyst, the polyethylene / highly isotactic polybutene alloy material is synthesized by virtue of two-section polymerization, and the obtained polybutene alloy is a powdery or spherical product with a core-shell structure, has the advantages of excellent impact resistance, thermal creep resistance and low shrinkage rate of polybutene-1 and high modulus, high surface hardness and quick setting property of polyethylene, is used for manufacturing pipes and pipe fittings and performing toughening modification on polypropylene, or can serve as a universal polyolefin material and is a novel polyolefin material.

Description

technical field [0001] The invention belongs to the technical field of novel polyolefin materials, and in particular relates to a preparation method of a polybutene alloy and a polyethylene / high isotactic polybutene alloy material prepared by the method. Background technique [0002] Isotactic polybutenes are prepared by the isotactic polymerization of butene-1 monomers. Isotactic polybutene-1 has outstanding creep resistance and stress crack resistance, and is an excellent resin for hot water pipes. However, isotactic polybutene has a very slow crystal transformation, and it often takes several days to more than ten days to complete the transformation and present stable performance. [0003] In order to reduce the heat-sealing temperature of polybutene-1, Chinese patent (ZL 01144854.7 and publication number: CN1090855A), Japanese patent (Japanese Patent Application No. 61-108615 and 60-38414), and U.S. patent (US4048419, 3944529, US 6998458) all Copolymerization of butene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20C08L23/06C08L53/00C08L23/08C08F293/00C08F210/08C08F210/02C08F110/08C08F110/02C08F4/646C08F4/654
CPCC08F110/02C08F110/08C08F210/16C08F293/00C08L23/20C08L2205/035C08L2205/02C08L23/06C08L23/0815C08L53/00C08F4/646C08F2/02
Inventor 贺爱华邵华锋刘晨光姜秀波刘振学
Owner QINGDAO UNIV OF SCI & TECH
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