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Preparation method of polybutene alloy

A polybutene alloy and butene technology, applied in the field of new polyolefin synthesis, can solve the problems of difficult to achieve smaller scale or even molecular level, reduce material modulus, strength and thermal deformation temperature, etc. Excellent capacitance and the effect of improving aging resistance

Active Publication Date: 2015-05-20
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the means of physical blending are usually difficult to achieve mixing on a smaller scale or even at the molecular level.
Chinese patents CN1090855A, ZL01144854.7, ZL 03800736.3, CN 1989199A, ZL 01142929.1, CN 1032172A and ZL 99800235.6 etc. have announced a series of polybutene copolymers, by adding comonomers to change the chain structure of the polymer, etc., improving polybutene The melting point of ene, but also reduce the material's modulus, strength and heat distortion temperature and other properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped out and replaced with high-purity nitrogen for several times, then metered and added 600ml of toluene, triethylaluminum (Al), external electron donor diphenyldimethoxy Silane (Si) and propylene 0.03Kg, add 0.25g of supported titanium catalyst (Ti mass content 3.5%), wherein Al / Ti=50 (molar ratio), Al / Si=10 (molar ratio). Stir and polymerize at 100°C until the reaction of propylene is complete, add 0.15Kg of 1-butene to the reactor, react at 250°C for 6 hours, recover unreacted 1-butene, then filter while it is hot, recover the catalyst residue, add the filtrate to industrial alcohol As a terminator and an anti-aging agent, 147 g of floc polymer polybutene alloy was directly obtained after the polymer was terminated and dried. It is measured that the high isotactic polybutene content in the polybutene alloy is 75wt.%, the high isotactic polypropylene is 19.5wt.%, and the polypropylen...

Embodiment 2

[0041] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then metered and added p-xylene 500ml, dimethylaluminum monochloride (Al), external electron donor cyclohexyl Trimethoxysilane and propylene 0.03Kg, add 0.25g of supported titanium catalyst (Ti mass content 3.5%), wherein Al / Ti=80 (molar ratio), Al / Si=20 (molar ratio). Stir and polymerize at 250°C until propylene is completely reacted, add 0.14Kg of 1-butene to the reactor, react at 100°C for 8 hours, recover unreacted 1-butene, then filter while it is hot, recover the catalyst residue, add the filtrate to industrial alcohol As a terminator and an anti-aging agent, 128 g of floc polymer polybutene alloy is obtained directly after the polymer is terminated and dried. It is measured that the high isotactic polybutene content in the polybutene alloy is 72wt.%, the high isotactic polypropylene is 22.8wt.%, and the polypropylene-polyb...

Embodiment 3

[0043] 10L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then metered and added 4000ml of toluene, monoethylaluminum dichloride (Al), external electron donor methylcyclohexyl Dimethoxysilane (silicon Si compound) and propylene 0.15Kg, add supported titanium catalyst (Ti mass content 3.5%) 1.0g, wherein Al / Ti=50 (molar ratio), Al / Si=20 (molar ratio). Add 40mL of hydrogen, stir and polymerize propylene at 160°C for complete reaction, add 0.8Kg of 1-butene to the reactor, react at 160°C for 6 hours, recover unreacted 1-butene, then filter while hot, recover catalyst residue, and filter the filtrate Add denatured alcohol as terminator and anti-aging agent, and directly obtain 800 g of granular polymer polybutene alloy after the polymer is terminated and dried. It is measured that the high isotactic polybutene content in the polybutene alloy is 78wt.%, the high isotactic polypropylene is 18...

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PUM

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Abstract

The invention discloses a preparation method of a polybutene alloy by a solution process. 1-butene and propylene are dissolved in an aromatic organic solvent to perform sectional solution polymerization, and one polymerization reaction device or a plurality of polymerization reaction devices connected in series is / are utilized for polymerization to obtain the multicomponent-structure polybutene alloy dissolved in the organic solvent. By using the solution polymerization process, the multicomponent structure in the polybutene alloy is uniformly mixed on the molecular level under the action of the organic solvent, thereby obtaining the polybutene alloy material with higher impact strength and toughness than that prepared by a physical blending process; and the catalyst residues can be removed in the after-treatment technique, thereby lowering the ash content in the polybutene alloy and enhancing the aging resistance.

Description

technical field [0001] The invention relates to the field of novel polyolefin synthesis, in particular to a solution polymerization preparation method of polybutene alloy. Background technique [0002] The performance of a single polymer material often cannot meet the higher requirements for use in certain aspects. For example, polypropylene has high strength and modulus, but its impact resistance is relatively low. When it is used in applications such as automobile bumpers and water pipes, it often has low stress impact toughness. Polybutene, which is also an α-olefin, has a greatly improved impact resistance compared to polypropylene. If polypropylene and polybutene are blended, the impact resistance of the blend system can be greatly improved on the basis of slightly reducing the strength and modulus of the blend system. [0003] Based on the above ideas, Chinese invention patent application 201310608858.1 physically blends polypropylene and polybutene to obtain a polyp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/08C08F110/06C08F293/00C08F4/646C08F2/06C08F2/01C08L23/20C08L23/12C08L53/00
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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