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Linear styrene-butadiene block copolymer and preparation method and application thereof

A technology of linear styrene-butadiene block and copolymer, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problems that the high temperature retardation effect cannot be guaranteed, and the low temperature resistance of matrix asphalt cannot be well improved.

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to overcome adopting existing retarder in the process that adopts existing retardation anionic polymerization to prepare SBS copolymer to be unable to guarantee to have high temperature retardation effect and wider operating window simultaneously, and the SBS copolymer that obtains Can not improve the defect of the low-temperature resistance property of base asphalt well, and provide a kind of new linear styrene-butadiene block copolymer, a kind of preparation method of linear-type styrene-butadiene block copolymer, the linear styrene-butadiene block copolymer prepared by said method Type styrene-butadiene block copolymer and the application of the linear-type styrene-butadiene block copolymer as bitumen modifier

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  • Linear styrene-butadiene block copolymer and preparation method and application thereof

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preparation example Construction

[0026] The preparation method of linear styrene-butadiene block copolymer provided by the invention may further comprise the steps:

[0027] (1) In the presence of an organic monolithium initiator, styrene is carried out in an inert solvent for the first anionic polymerization reaction to obtain a solution containing polystyrene;

[0028] (2) Add an organoaluminum compound to the solution containing polystyrene and mix for 5-10 minutes, then add butadiene to continue the second anionic polymerization reaction to obtain a block polymer containing styrene and butadiene The solution; The organoaluminum complex contains at least one general formula of AlR 1 R 2 R 3 Alkyl aluminum Al 1 and at least one of the general formula AlR 4 R 5 R 6 Alkyl aluminum Al 2 , R 1 , R 2 and R 3 each independently for C 1 -C 4 the alkyl group, R 4 , R 5 and R 6 each independently for C 6 -C 20 Alkyl or C 6 -C 20 the aryl group;

[0029] (3) Add a coupling agent to the solution of...

Embodiment 1

[0050] Under the protection of high-purity nitrogen, 1800g of cyclohexane and 230g of styrene were sequentially added to a 5L batch polymerization reactor equipped with an anchor stirrer, stirring was started, and the circulating water bath was heated to 60°C, and then 9ml of n-butylene was added to the reactor Lithium solution (1.6M hexane solution, the same below) initiates the polymerization reaction. After 20min, the styrene stage reaction ends, and 4ml of triisobutylaluminum solution (1.1M hexane solution, the same below) and 17ml triisobutylaluminum solution are added to the reactor. Phenyl aluminum solution (1.0M hexane solution, the same below), add 540g butadiene in the reactor after 10min, after 1h the reaction ends, add 8ml of 1,8-dibromooctane solution (0.5 M cyclohexane solution, the same below), 1ml isopropanol was added after 30min, 6g antioxidant 264 was added after 5min, after stirring evenly, water vapor condensed to remove cyclohexane, dried in a vacuum oven ...

Embodiment 2

[0052] Under the protection of high-purity nitrogen, 1800g of cyclohexane and 255g of styrene were sequentially added to a 5L batch polymerization reactor equipped with an anchor stirrer, stirring was started, and the circulating water bath was heated to 60°C, and then 8ml of n-butylene was added to the reactor Lithium-based solution initiates the polymerization reaction. After 20 minutes, the styrene segment reaction ends. Add 6ml of triisobutylaluminum solution and 8ml of triphenylaluminum solution to the reactor, add 515g of butadiene to the reactor after 10 minutes, and react after 1 hour. At the end, add 10.5ml of 1,8-dibromooctane solution to the reactor, add 1ml of isopropanol after 30 minutes, add 6g of antioxidant 264 after 5 minutes, stir evenly, water vapor condenses to remove cyclohexane, and vacuum oven Dry until the volatile matter is less than 1% by weight to obtain the styrene-butadiene block copolymer SBS-2. The analysis and characterization of the styrene-but...

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Abstract

The invention relates to the field of polymer and specifically provides a linear styrene-butadiene block copolymer and a preparation method and application thereof. The preparation method of the linear styrene-butadiene block copolymer comprises the following steps: (1) carrying out a first anionic polymerisation reaction on styrene; (2) adding an organo-aluminium compound into a polystyrene-containing solution obtained in the step (1) and mixing for 5-10 min, and adding butadiene to carry out a second anionic polymerisation reaction; wherein the organo-aluminium compound contains at least an aluminium alkyl Al1 and at least an aluminium alkyl Al2; and (3) adding a coupling agent with two coupling functional groups to carry out a coupled reaction. According to the preparation method of the linear styrene-butadiene block copolymer, two kinds of aluminium alkyl are used in cooperation such that a good high-temperature blockage effect can be guaranteed in a wide operation window, and the obtained linear styrene-butadiene block copolymer has good compatibility with matrix asphalt. In addition, low temperature performance of matrix asphalt can be remarkably reduced. The product has an industrial application prospect.

Description

technical field [0001] The invention relates to a linear styrene-butadiene block copolymer, a preparation method of a linear styrene-butadiene block copolymer, a linear styrene-butadiene block copolymer prepared by the method, and the linear styrene-butadiene block copolymer. Application of segment copolymers as bitumen modifiers. Background technique [0002] Styrene-butadiene-styrene block copolymer (SBS) modified asphalt is a new type of high-quality road construction material with high technical content and added value. Compared with original asphalt, SBS modified asphalt can significantly improve the quality of asphalt. high and low temperature performance. There are two types of SBS used for asphalt modification: star-type and linear-type. Star-type SBS can significantly improve the high-temperature performance of asphalt. Not very good, and linear SBS has better compatibility with base asphalt. [0003] Traditional linear styrene-butadiene-styrene (SBS) is prepared...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/18C08L95/00C08L53/02
Inventor 李建成徐林王雪刘天鹤毕海鹏赵姜维
Owner CHINA PETROLEUM & CHEM CORP
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