Wear-resistant SBS modified asphalt and preparation method thereof

A modified asphalt and modified technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of lack of wear resistance, high molecular weight, low density, etc., and achieve greater sliding difficulty, higher molecular weight and density, The effect of increasing polarity

Active Publication Date: 2021-07-23
江阴市新远见工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with asphalt, SBS has lower density, higher molecular weight, higher viscosity, and is a non-polar substance, which makes it easy to gather on the top of the asphalt after asphalt blending, while the asphalt sinks to the bottom and phase separation occurs Phenomenon, and when applied to the friction surface, the wear resistance is lacking

Method used

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  • Wear-resistant SBS modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of modified SBS:

[0040] Mix vinyl chloride and vinyl acetate, add photoinitiator 1-hydroxycyclohexyl phenylhexanone, in nitrogen atmosphere, use 150μW / cm 2The light intensity of ultraviolet light was irradiated for 40 minutes; the reaction product was pulverized, soaked in acetone for 48 hours, stirred and dissolved, added deionized water, and the precipitate was dried at 80°C for 48 hours to obtain product A; among them, vinyl chloride and vinyl acetate The mass ratio is 4.2:1.0, and the concentration of the photoinitiator in the reaction system is 3×10 -3 mol / L;

[0041] Take the product A, add methanol, heat to dissolve, adjust the temperature of the system to 40°C, add sodium hydroxide solution and methanol, stir for 30 minutes, add sodium hydroxide solution and methanol, increase the stirring speed, and continue stirring for 75 minutes; take the solid product for washing, Dry at 80°C for 12 hours to obtain product B;

[0042] Dissolve SBS and p...

Embodiment 2

[0050] (1) Preparation of modified SBS:

[0051] Mix vinyl chloride and vinyl acetate, add photoinitiator 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, in nitrogen atmosphere, at 20μW / cm 2 The light intensity of ultraviolet light was irradiated for 60 minutes; the reaction product was crushed, soaked in acetone for 45 hours, stirred and dissolved, added deionized water, and the precipitate was dried at 75°C for 45 hours to obtain product A; among them, vinyl chloride and vinyl acetate The mass ratio is 1.0:1.8), and the concentration of the photoinitiator in the reaction system is 1×10 -5 mol / L;

[0052] Take the product A, add methanol, heat to dissolve, adjust the temperature of the system to 35°C, add sodium hydroxide solution and methanol, stir and react for 20 minutes, add sodium hydroxide solution and methanol, increase the stirring speed, and continue stirring for 60 minutes; take the solid product for washing, Dry at 75°C for 10 hours to obtain prod...

Embodiment 3

[0061] (1) Preparation of modified SBS:

[0062] Mix vinyl chloride and vinyl acetate, add photoinitiator azobisisoheptanonitrile, in nitrogen atmosphere, use 300μW / cm 2 The light intensity of ultraviolet light was irradiated for 20 minutes; the reaction product was crushed, soaked in acetone for 54 hours, stirred and dissolved, added deionized water, and the precipitate was dried at 85 ° C for 50 hours to obtain product A; among them, vinyl chloride and vinyl acetate The mass ratio is 2.6:1.4, and the concentration of the photoinitiator in the reaction system is 5×10 -3 mol / L;

[0063] Take the product A, add methanol, heat to dissolve, adjust the temperature of the system to 45°C, add sodium hydroxide solution and methanol, stir for 40 minutes, add sodium hydroxide solution and methanol, increase the stirring speed, and continue stirring for 90 minutes; take the solid product for washing, Dry at 85°C for 15 hours to obtain product B;

[0064] Dissolve SBS and product B in...

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Abstract

The invention discloses wear-resistant SBS modified asphalt and a preparation method thereof, the wear-resistant SBS modified asphalt comprises the following components in parts by weight: 90-100 parts of asphalt, 2-6 parts of modified SBS and 7-13 parts of modified nanoparticles, and the modified SBS comprises the following components: SBS, vinyl chloride, vinyl acetate, methanol, a photoinitiator, a catalyst and diisocyanate. According to the invention, through blending reaction of the isocyanato phenolic acid terminated modified SBS, the epoxy group-containing modified nano particles and the asphalt, the compatibility of the SBS in the asphalt is improved, the phase separation phenomenon is prevented, the stability is improved, the SBS modified asphalt forms a three-dimensional network structure, the nano particles are coated, the limitation on the molecular chain is enhanced, the internal stress is weakened, and the wear resistance and the mechanical property are improved.

Description

technical field [0001] The invention relates to the technical field of asphalt, in particular to a wear-resistant SBS modified asphalt and a preparation method thereof. Background technique [0002] The surface of asphalt is black and mostly exists in liquid or semi-solid state. It is composed of hydrocarbons with different molecular weights and their non-metallic derivatives. SBS is a styrene-butadiene-styrene block copolymer, a thermoplastic elastomer with the largest output in the world and the most similar properties to rubber. The SBS modified asphalt is to use shearing, stirring and other methods to uniformly disperse a certain amount of SBS in the raw material matrix asphalt to form an SBS blend material. The good physical properties of SBS are used to modify the asphalt, which can improve the asphalt. High and low temperature resistance, improve its elasticity, toughness, bearing capacity, etc. Asphalt and SBS are blended to form a micro-mixed compatible state. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L87/00C08K9/06C08K3/36C08G81/02
CPCC08L95/00C08G81/022C08K2201/011C08L87/005C08K9/06C08K3/36
Inventor 马晓琴唐春龙
Owner 江阴市新远见工程有限公司
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