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Star-shaped styrene-butadiene block copolymer and its preparation method and application

A styrene-butadiene block and copolymer technology, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems that the solubility cannot be improved well, and the blocking agent cannot guarantee the high-temperature blocking effect, etc.

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 its dissolubility in asphalt well, and provide a kind of new star-shaped styrene-butadiene block copolymer, a kind of preparation method of star-shaped styrene-butadiene block copolymer, prepared by the above-mentioned method Star-shaped styrene-butadiene block copolymer and the application of said star-shaped styrene-butadiene block copolymer as bitumen modifier

Method used

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preparation example Construction

[0026] The preparation method of the star-shaped styrene butadiene block copolymer provided by the present invention includes the following steps:

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

[0028] (2) Add the organoaluminum compound to the polystyrene-containing solution 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 organic aluminum composite contains at least one general formula AlR 1 R 2 R 3 Al alkyl Al 1 And at least one general formula is AlR 4 R 5 R 6 Al alkyl Al 2 , R 1 , R 2 And R 3 Each independently C 1 -C 4 The alkyl group, R 4 , R 5 And R 6 Each independently C 6 -C 20 The alkyl group or C 6 -C 20 的aryl;

[0029] (3) A coupling agent is added to the solution containing the block polymer of sty...

Embodiment 1

[0050] Under the protection of high-purity nitrogen, 1800g cyclohexane and 230g styrene were sequentially added to a 5L batch polymerization reactor equipped with an anchor stirrer. The stirring was started. The circulating water bath was heated to 60℃, and then 10ml n-butyl was added to the reactor. Base lithium solution (1.6M hexane solution, the same below) initiates the polymerization reaction. After 20 minutes, the styrene section reaction is over. Add 4.5ml of triisobutyl aluminum solution (1.1M hexane solution, the same below) and 19ml into the reactor. Triphenylaluminum solution (1.0M hexane solution, the same below), add 540g butadiene into the reactor after 10min, the reaction is over after 1h, add 8.5ml silicon tetrachloride solution (0.4M cyclohexane Alkane solution, the same below), add 1ml of isopropanol after 30min, add 6g of antioxidant 264 after 5min, stir evenly, water vapor condenses to remove cyclohexane, vacuum oven dried to volatile content less than 1% by ...

Embodiment 2

[0052] Under the protection of high-purity nitrogen, 1800g cyclohexane and 255g styrene were sequentially added to a 5L batch polymerization reactor equipped with an anchor stirrer. The stirring was started, and the circulating water bath was heated to 60°C, and then 8.5ml normal was added to the reactor. The butyl lithium solution initiates the polymerization reaction. After 20 minutes, the styrene reaction is completed. Add 6ml of triisobutylaluminum solution and 8ml of triphenylaluminum solution to the reactor. After 10 minutes, add 515g of butadiene to the reactor. After 1h After the reaction is over, add 8.2ml silicon tetrachloride solution to the reactor, add 1ml isopropanol after 30min, add 6g antioxidant 264 after 5min, stir evenly, steam condenses to remove cyclohexane, vacuum oven dry to volatile Less than 1% by weight to obtain styrene-butadiene block copolymer SBS-2. Analyzing and characterizing the styrene-butadiene block copolymer SBS-2, its molecular weight distr...

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Abstract

The invention relates to field of polymers, in particular to a star type butylbenzene block copolymer and a preparation method and application thereof. The preparation method includes the steps of firstly, allowing styrene to have a first anionic polymerization reaction; secondly, adding an organic aluminum compound into a solution, containing polystyrene, obtained in the first step, mixing for 5-10 minutes, and adding butadiene to perform a second anionic polymerization reaction, wherein the organic aluminum compound contains at least one alkyl aluminum Al1 and at least one alkyl aluminum Al2; thirdly, adding a coupling agent with coupling functional groups being 3-4 to perform a coupling reaction. The preparation method has the advantages that the two alkyl aluminum are coordinated, a good high temperature resistant effect in a wide operating window can be guaranteed, and the obtained star type butylbenzene block copolymer can increase the high temperature performance of modified asphalt, has good compatibility with matrix asphalt and is promising in industrial application prospect.

Description

Technical field [0001] The invention relates to a star-shaped styrene-butadiene block copolymer, a method for preparing a star-shaped styrene-butadiene block copolymer, a star-shaped styrene-butadiene block copolymer prepared by the method, and the star-shaped styrene-butadiene block copolymer Segment copolymers are used as asphalt modifiers. Background technique [0002] Styrene-butadiene-styrene block copolymer (SBS) modified asphalt is a new high-quality road construction material with higher technical content and added value. Compared with the original asphalt, SBS modified asphalt can significantly improve the asphalt The high and low temperature performance. The SBS used for asphalt modification is divided into two types: star-shaped and linear. Star-shaped SBS can significantly improve the high-temperature performance of asphalt. However, due to the vast difference in the composition of base asphalt, the solubility of star-shaped SBS in base asphalt is in many cases Not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08F2/40C08F8/42C08L95/00C08L53/02
Inventor 李建成毕海鹏刘天鹤赵姜维
Owner CHINA PETROLEUM & CHEM CORP
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