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A kind of polybutene alloy material and preparation method thereof

A technology of polybutene alloy and butene, which is applied in the field of new polyolefin materials, can solve the problems of poor mechanical properties of polypropylene, unsatisfactory pressure resistance, and large molding shrinkage, and achieve excellent impact resistance and good hydrogen sensitivity. Sex, low shrinkage effect

Active Publication Date: 2011-12-07
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] One of the purposes of the present invention is to address the performance defects of the current single polyolefin example, such as long curing time of polybutene, unsatisfactory pressure resistance, etc., while polypropylene has poor mechanical properties at low temperature, large molding shrinkage, easy aging, Poor thermal creep resistance greatly limits its scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped out and replaced with high-purity nitrogen several times, then metered and added triethylaluminum (Al) and external electron donor diphenyldimethoxysilane (Si ) and supported titanium catalyst (Ti) 0.25g, add propylene 0.05Kg, wherein Al / Ti=50 (molar ratio), Al / Si=10 (molar ratio). Stir and polymerize at 60°C for 20 minutes, then cool down and empty the propylene, add 0.2Kg of 1-butene into the reactor, react at 30°C for 6h, and obtain 141g of powdered polymer polybutene alloy directly after drying.

[0055] The properties of the polybutene alloy are shown in Table 1.

Embodiment 2

[0057] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced with high-purity nitrogen for several times, then metered 100ml of hexane, triethylaluminum (Al), and external electron donor cyclohexyltrimethoxysilane into the reaction kettle in sequence And support titanium catalyst (Ti) 0.25g, add propylene 0.05Kg, wherein Al / Ti=80 (molar ratio), Al / Si=20 (molar ratio). Stir and polymerize at 70°C for 20 minutes, then cool down and empty the propylene, add 0.2Kg of 1-butene into the reactor, react at 35°C for 8 hours, and obtain 172g of powdered polymer polybutene alloy directly after drying.

[0058] The properties of the polybutene alloy are shown in Table 1.

Embodiment 3

[0060] 10L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced with high-purity nitrogen several times, then metered and added 150ml of heptane, triethylaluminum (Al), and external electron donor diphenyl dimethoxy Base silane (silicon Si compound) and supported titanium catalyst (Ti) 1.0g, add propylene 0.5Kg, wherein Al / Ti=50 (molar ratio), Al / Si=20 (molar ratio). Stir and polymerize at 60°C for 0.5hr, then cool down and empty the propylene and solvent heptane, add 4.0Kg of 1-butene to the reaction kettle, react at 40°C for 6h, and obtain 3.3Kg of powdered polymer polybutene alloy directly after drying . The properties of the polybutene alloy are shown in Table 1. Polybutene alloys can replace part of polyethylene and polypropylene for the production of pipes and fittings or as general polyolefin materials.

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PUM

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Abstract

The invention discloses a polybutene alloy material and a preparation method thereof, and belongs to the field of polyolefin material, specifically relates to a polybutene alloy material and a preparation method thereof. The polybutene alloy material provided by the present invention comprises, by mass, 50-99% of poly-1-butene, 1-40% of polypropylene and 0-10% of a butane-propylene copolymer. Thepreparation method is characterized by: adopting a TiCl4 / MgCl2 supported titanium catalyst for synthesis of the polybutene alloy material through a two-phase polymerization method. The polybutene alloy material provided by the present invention has a core-shell structure, and has advantages of the combination of the excellent impact resistance of the poly-1-butene, the heat resistance and creep property of the poly-1-butene, the low shrinkage rate of the poly-1-butene, the high modulus of the polypropylene, the high surface hardness of the polypropylene, the rapid shaping of the polypropylene, and the like, such that the polybutene alloy material can replace the partial use of the poly-1-butene and the polypropylene. In addition, the polybutene alloy material can be applicable for preparation of the pipe and the pipe fitting, toughening modification of the polypropylene, or the polybutene alloy material can be used as the general polyolefin material.

Description

technical field [0001] The invention relates to the field of a novel polyolefin material, in particular to a method for preparing a polybutene alloy and a polybutene-polypropylene alloy material prepared by the method. Background technique [0002] Generally, polypropylene has the characteristics of low density, low price, and good processability, and its yield strength, tensile strength, surface hardness, and elastic modulus are all excellent. However, PP has poor impact resistance at low temperature, large molding shrinkage, easy aging, and poor thermal creep resistance, which greatly limits its application range. [0003] Isotactic polybutene is a semi-crystalline polymer composed of 1-butene as a monomer. The properties of isotactic polybutene include high flexibility, outstanding creep resistance and high temperature resistance. tensile strength. However, poly-1-butene resin takes a long time to cure, and it often takes several days to more than ten days to show stabl...

Claims

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Application Information

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IPC IPC(8): C08L23/20C08L23/12C08L23/14C08F110/06C08F2/02C08F2/06C08F110/08C08F210/06C08F210/08
Inventor 贺爱华黄宝琛姚薇邵华锋刘晨光
Owner QINGDAO UNIV OF SCI & TECH
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