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Self-crosslinking polymer modified asphalt emulsion and preparation method thereof

A modified asphalt, cross-linked technology, applied in the direction of building structure, building components, building insulation materials, etc., can solve the problem of poor storage stability of modified asphalt emulsion, high requirements for crushing degree and emulsifier, and construction time Higher control requirements and other issues, to achieve the effect of low cost, good anti-rutting ability, and improved weather resistance

Pending Publication Date: 2022-01-11
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires two processes of preparation of modified asphalt and emulsification of modified asphalt, and the preparation efficiency is not high
In addition, this technique also has the following deficiencies: 1) the polymer forms a network structure in the asphalt, and a colloid mill with a strong shear force must be used to emulsify, and when the shear force is large enough, it will be emulsified. Cause damage to the network structure and reduce the modification effect
2) Modified asphalt is extremely difficult to emulsify, and an emulsifier with excellent performance is required to emulsify. At present, there is no emulsifier product that is fully suitable for emulsification of modified asphalt
3) The density of modified asphalt is high, the density of emulsified asphalt particles is high, and the relative stability is poor, so the storage stability of modified asphalt emulsion is also poor
However, this invention has high requirements on the crushing degree of SBS and emulsifier, and requires high-performance emulsifier and process equipment; patent CN108192363 discloses a preparation technology of water-based epoxy resin modified emulsified asphalt and its low-temperature performance improvement method , the invention is prepared by first emulsifying and then modifying. The prepared water-based epoxy resin modified emulsified asphalt has better stability, and the low-temperature performance of water-based epoxy resin-modified emulsified asphalt is improved by adding a toughening agent, so that the water-based epoxy resin modified emulsified asphalt Oxygen-modified emulsified asphalt has excellent performance, but due to the curing reaction between epoxy resin and curing agent, it requires high construction time control, and after construction, it needs to be cured, so that the pavement can reach the expected strength

Method used

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  • Self-crosslinking polymer modified asphalt emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 100 parts by weight of dicarboxyphenyl acetate monomer, 60 parts by weight of butadiene, 60 parts by weight of butyl methacrylate and 0.2 parts by weight of azobisisobutyronitrile and add them with stirring In the three-necked flask of the device and the condensing reflux device, heat and react with 800r / min speed stirring for 4 hours, then add 10 parts by weight of chlorosulfonic acid, and react for 1 hour. Finally, 5 parts by weight of 3% aqueous sodium hydroxide solution was added, stirred continuously for 1 hour, and dried to obtain a crosslinkable emulsification modifier.

[0039] (2) Weigh 10 parts by weight of cryptocrystalline graphene and 60 parts by weight of light coal tar and mix, then add 3 parts by weight of vinylsilane, and grind in a mill for 2 hours to obtain active cryptocrystalline graphene slurry. Weigh 50 parts by weight of matrix pitch, add 10 parts by weight of active cryptocrystalline graphene slurry and 20 parts by weight of cross-link...

Embodiment 2

[0042] (1) Weigh 100 parts by weight of dicarboxyphenyl acetate monomer, 70 parts by weight of butadiene, 50 parts by weight of butyl methacrylate and 10 parts by weight of azobisisobutyronitrile and add them with stirring In the three-necked flask of device and condensing reflux device, heating simultaneously with 1000r / min speed stirring reaction 4 hours, then add 13 parts by weight of chlorosulfonic acid, react 2 hours. Finally, 8 parts by weight of a 3% aqueous solution of sodium hydroxide was added, stirred continuously for 2 hours, and dried to obtain a crosslinkable emulsification modifier.

[0043] (2) Weigh 15 parts by weight of cryptocrystalline graphene and 45 parts by weight of light coal tar and mix, then add 5 parts by weight of vinylsilane, and grind in a mill for 1.5 hours to obtain active cryptocrystalline graphene slurry. Weigh 55 parts by weight of matrix pitch, add 15 parts by weight of active cryptocrystalline graphene slurry and 25 parts by weight of cros...

Embodiment 3

[0046] (1) Weigh 100 parts by weight of dicarboxyphenyl acetate monomer, 80 parts by weight of butadiene, 40 parts by weight of butyl methacrylate three kinds of reaction monomers and 20 parts by weight of dibenzoyl peroxide and add them with stirring In the three-necked flask of the device and the condensing reflux device, heat while stirring and reacting at a speed of 1000r / min for 4 hours, then add 11 parts by weight of chlorosulfonic acid, and react for 1 hour. Finally, 5 parts by weight of 3% aqueous sodium hydroxide solution was added, stirred continuously for 1 hour, and dried to obtain a crosslinkable emulsification modifier.

[0047] (2) Weigh 20 parts by weight of cryptocrystalline graphene and 30 parts by weight of light coal tar and mix, then add 8 parts by weight of vinylsilane, and grind in a mill for 2 hours to obtain active cryptocrystalline graphene slurry. Weigh 60 parts by weight of matrix pitch, add 20 parts by weight of active cryptocrystalline graphene sl...

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Abstract

The invention discloses a self-crosslinking polymer modified asphalt emulsion and a preparation method thereof. The preparation method comprises the following steps: 1) mixing a phenyl dicarboxyl acetate monomer, a butadiene monomer, a butyl methacrylate monomer, an initiator, a sulfonating agent and alkali playing a role in neutralization to prepare a crosslinkable emulsification modifier; 2) preparing active cryptocrystalline graphene slurry from cryptocrystalline graphene, light coal tar and a silane coupling agent, and adding a cross-linkable emulsion modifier into a mixed system of the active cryptocrystalline graphene slurry and matrix asphalt to obtain hybrid modified asphalt; and 3) preparing the self-crosslinking polymer modified asphalt emulsion from the hybrid modified asphalt, a stabilizer, a water-based crosslinking agent and water. The self-crosslinking polymer modified asphalt emulsion prepared by the preparation method disclosed by the invention is better in bonding strength and heat and humidity resistance to a base material, more excellent in storage stability and better in emulsifying effect, and the mechanical property and the rutting resistance are also improved.

Description

technical field [0001] The invention relates to the technical field of modified asphalt emulsion, in particular to a self-crosslinking polymer modified asphalt emulsion and a preparation method thereof. Background technique [0002] With the seriousness of road traffic problems, traffic requirements for road surfaces are also more stringent. In road construction projects, emulsified asphalt can adhere to wet aggregate, has strong cohesive force, good construction workability, easy mixing, and can save asphalt consumption. It is a road construction material with broad development prospects. However, ordinary emulsified asphalt is only suitable for ordinary roads. The maintenance of expressway asphalt pavement puts forward higher requirements for the application of emulsified asphalt. It has become the development trend of asphalt technology at home and abroad to improve the performance and prolong the service life of the pavement. [0003] Polymer modified asphalt emulsion ...

Claims

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Application Information

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IPC IPC(8): C08F220/30C08F236/06C08F8/36C08L95/00C08L33/14C08K3/04
CPCC08F8/36C08L95/00C08L2201/08C08F220/303C08F236/06C08L33/14C08K3/042
Inventor 陈顺朱颜田跃千贺行洋苏英陈威徐慧张博陈吉展潘应源童艳名储劲松
Owner HUBEI UNIV OF TECH
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