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High-performance SBS modified asphalt and production process thereof

A modified asphalt, high-performance technology, used in building components, building insulation materials, buildings, etc., can solve the problem of insufficient anti-aging performance of asphalt, improve the stability of thermal and oxygen resistance, improve the cross-linking bond strength, improve the The effect of anti-aging properties

Active Publication Date: 2021-11-02
武汉思立特公路物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Regarding the above-mentioned anti-aging SBS modified asphalt, the inventor believes that in relatively harsh application environments, the anti-aging performance of asphalt is not strong enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The application provides a kind of preparation method of EVA grafted maleic anhydride, comprises the steps:

[0042] 1), after maleic anhydride, initiator, acetone, EVA are mixed uniformly, reaction material is obtained;

[0043] 2) Mixing, extruding, pelletizing and grinding the mixture in a screw extruder.

[0044] Preferably, the content of vinyl acetate in EVA is 14%, and the melt index is 6.

[0045] Preferably, the initiator is at least one of ammonium persulfate and dicumyl peroxide. Further preferably, the initiator is composed of ammonium persulfate and dicumyl peroxide in a mass ratio of 0.5:3.

[0046] Preferably, the graft ratio of maleic anhydride is 1.5-3%. Further preferably, the graft ratio of maleic anhydride is 2.6%.

[0047]Preferably, the mixing temperature is 165-180°C. More preferably, the kneading temperature is 170°C.

[0048] The application provides a kind of production technology of high-performance SBS modified asphalt, comprising the f...

Embodiment 1

[0058] The high-performance SBS modified asphalt of the present embodiment is made of the following raw materials: 80kg of asphalt, 3kg of SBS, 3kg of solubilizer, 0.5kg of stabilizer, 5kg of antiaging agent; antiaging agent consists of dibutyl adipate, N , N-bis(2-naphthyl)-p-phenylenediamine is composed of a mass ratio of 3:13.

[0059] Among them, the asphalt is No. 70 petroleum asphalt. SBS is a linear SBS, the tensile strength is 25.36Mpa, the melt flow rate is 0.3-0.38g / 10min, and the volatile content is less than 0.6%. The stabilizer is sulfur. The solubilizer is aromatic hydrocarbon oil, the aromatic hydrocarbon content is greater than 80%, and the manufacturer is Shandong Taichang Petrochemical Technology Co., Ltd.

[0060] The production technology of the high-performance SBS modified bitumen of the present embodiment, comprises the steps:

[0061] S1: Heat the asphalt to 160°C, then add SBS, solubilizer, and stabilizer, mix at a stirring speed of 1200rpm for 40mi...

Embodiment 2-5

[0064] The high-performance SBS modified asphalt of embodiment 2-5 is made of following raw material: asphalt, SBS, solubilizer, stabilizer, antiaging agent; Antiaging agent is made of dibutyl adipate, N, N-two ( 2-naphthyl)-p-phenylenediamine is composed in a mass ratio of 3:13.

[0065] The addition amount of each raw material of high-performance SBS modified asphalt in Examples 2-5 is shown in Table 2.

[0066] The addition of each raw material of table 2 embodiment 2-5 high-performance SBS modified asphalt

[0067] Raw material (kg) Example 1 Example 2 Example 3 Example 4 Example 5 asphalt 80 100 90 97 85 SBS 3 5.5 4.5 4 7 Solubilizers 3 8 6.5 5 10 stabilizer 0.5 1.5 1 0.8 1.2 anti aging agent 5 6.5 7.2 8 10

[0068] The production technology of the high-performance SBS modified bitumen of embodiment 2-5, comprises the steps:

[0069] S1: Heat the asphalt to 160°C, then add SBS, solubilizer, and st...

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Abstract

The invention relates to the technical field of modified asphalt, and particularly discloses high-performance SBS modified asphalt and a production process thereof. The high-performance SBS modified asphalt is mainly prepared from the following raw materials: asphalt, SBS, a solubilizer, a stabilizer and an anti-aging agent, the anti-aging agent is prepared from at least one of dibutyl adipate and tetrapropyl ammonium chloride and N, N-bis (2-naphthyl) p-phenylenediamine according to the mass ratio of (3 to 7) to (13 to 22). The production process of the high-performance SBS modified asphalt comprises the following steps: S1, heating asphalt to 160-175 DEG C, then adding SBS, the solubilizer and the stabilizer, and uniformly mixing to obtain an intermediate material; and S2, adding the anti-aging agent into the intermediate material, and stirring for 60-90 minutes, thereby obtaining the product. The high-performance SBS modified asphalt can be used in the industries of buildings, roads, bridges and the like, and has the advantages of aging resistance and high stability.

Description

technical field [0001] The application relates to the technical field of modified asphalt, more specifically, it relates to a high-performance SBS modified asphalt and its production process. Background technique [0002] Modified asphalt refers to asphalt added with modifiers, which can comprehensively improve the performance of asphalt in terms of temperature sensitivity, stability, durability, adhesion, and aging resistance. At present, the most widely used modifiers are elastomers or plastomeric polymers, which can resist permanent deformation. Among them, SBS is the most widely used elastomer modifier. [0003] SBS is styrene-butadiene-styrene block copolymer, which is a block copolymer prepared by anionic polymerization using butadiene and 1,3-butadiene as monomers. It has both plastic and rubber properties. A thermoplastic elastomer with physical and mechanical properties. It has good compatibility with asphalt and meets the corresponding high temperature and low tem...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L23/08C08L51/00C08K5/11C08K5/19C08K5/18
CPCC08L95/00C08L2205/03C08L2201/08C08L53/02C08K5/11C08K5/19C08K5/18C08L23/0853C08L51/003
Inventor 顾宗金陈铠
Owner 武汉思立特公路物资有限公司
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