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Poly 1-butene/1-butylene-propylene copolymer in-reactor alloy and preparation method thereof

A technology of propylene copolymer and alloy in the kettle, applied in the field of polyolefin alloys, can solve the problems of long setting time, slow melt cooling rate, low strength, etc., achieve low shrinkage rate, improve crystal transformation rate, and excellent impact resistance performance effect

Active Publication Date: 2014-07-30
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the purposes of the present invention is to prepare a novel poly-1-butene with improved cooling crystallization speed and higher strength in order to solve the problems of slow cooling rate of melt in current poly-1-butene, resulting in long setting time and low strength. -Butene alloy material

Method used

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  • Poly 1-butene/1-butylene-propylene copolymer in-reactor alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 3L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then added 350g of 1-butene monomer, triethylaluminum (Al), and external electron donor diphenyl Dimethylsilane (Si) and supported Ti catalyst (Ti) 0.26g, where Al / Ti=150, Si / Ti=10 (molar ratio), add 60ml of hydrogen, evacuate the remaining 1-butane after polymerization at 28°C for 6h ethylene monomer, 77g of mixed gas of 1-butene and propylene was introduced, the reaction was continued for 2h, and the drying was terminated to obtain 330g of powdered poly-1-butene / 1-butene-propylene copolymer alloy in an autoclave.

[0029] The properties of the alloy in the poly-1-butene kettle are shown in Table 1.

Embodiment 2

[0031] 3L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then added 350g of 1-butene monomer, triethylaluminum (Al), and external electron donor diphenyl Dimethylsilane (Si) and supported Ti catalyst (Ti) 0.26g, where Al / Ti=150, Si / Ti=10 (molar ratio), add 40ml of hydrogen, after 6 hours of polymerization at 28°C, empty the remaining 1- For butene monomer, 100 g of mixed gas of 1-butene and propylene was introduced, the reaction was continued for 2 hours, and the drying was terminated to obtain 365 g of powdered poly-1-butene / 1-butene-propylene copolymer alloy in a kettle.

[0032] The properties of the alloy in the poly-1-butene kettle are shown in Table 1.

Embodiment 3

[0034] 3L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then added 350g of 1-butene monomer, triethylaluminum (Al), and external electron donor diphenyl Dimethylsilane (Si) and supported Ti catalyst (Ti) 0.26g, where Al / Ti=150, Si / Ti=10 (molar ratio), after polymerization at 28°C for 6h, directly feed 76g of propylene, and continue the reaction for 2h , the drying was terminated to obtain 370 g of powdered poly-1-butene / 1-butene-propylene copolymer alloy in a kettle.

[0035] The properties of the alloy in the poly-1-butene kettle are shown in Table 1.

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Abstract

The invention discloses a poly 1-butene / 1-butylene-propylene copolymer in-reactor alloy material and a preparation method thereof, belongs to the field of polyolefin material, and relates to poly 1-butene in-reactor alloy, and a preparation method and applications thereof. According to the poly 1-butene / 1-butylene-propylene copolymer in-reactor alloy material, a poly 1-butene homopolymer is taken as a main ingredient, and the poly 1-butene / 1-butylene-propylene copolymer in-reactor alloy material comprises a small amount of a 1-butylene / propylene copolymer, wherein molar content of propylene monomer unit ranges from 2 to 25%, molar content of 1-butene monomer unit range from 75 to 98%, mass content of poly 1-butene ranges from 65 to 89%, and mass content of the 1-butylene / propylene copolymer ranges from 35 to 11%. The poly 1-butene / 1-butylene-propylene copolymer in-reactor alloy material is prepared by adopting a high-efficient loaded Ti catalytic system and via two-stage bulk in-suit polymerization. The polybutene alloy material possesses excellent shock resistance and thermal creep resistance, and low shrinking rate of the poly 1-butene homopolymer; is capable of increasing crystal transfer rate of poly 1-butene, and shortening shaping and curing time at the same time; and can be used for replacing a part of polyethylene and polypropylene for preparation of tubular products or for toughening modification of polypropylene.

Description

technical field [0001] The invention belongs to the field of polyolefin alloys, and relates to a preparation method of a poly1-butene / 1-butene-propylene copolymer alloy in a kettle and an obtained alloy material. Background technique [0002] Isopoly-1-butene is a semi-crystalline polymer with high flexibility, outstanding creep resistance, and high temperature tensile strength. However, the curing time of poly-1-butene resin is long, and it often takes several days to more than ten days to show stable performance. [0003] Synthesis of poly-1-butene / butene-propylene copolymer tank alloy by two-stage polymerization, one-stage 1-butene bulk polymerization can synthesize high isotactic poly-1-butene resin with good particle shape, and two-stage polymerization introduces propylene monomer , the introduction of a small amount of propylene monomer units into the poly-1-butene molecular chain can significantly accelerate the crystal transformation speed of poly-1-butene resin, im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20C08F110/08C08F210/08C08F210/06C08F4/649C08F4/646
CPCC08F110/08C08F210/08C08L23/20C08L2203/18C08L2205/025C08L2314/02C08F4/6494C08F210/06
Inventor 邵华锋姚薇蒋东旭贺爱华
Owner QINGDAO UNIV OF SCI & TECH
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