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Vinyl chloride acrylate copolymer modified water-based asphalt and preparation method thereof

A technology of copolymer modification and acrylate, which is used in the preparation of new asphalt materials and the preparation of vinyl chloride/acrylate copolymer modified water-based asphalt, can solve the problems of low tensile strength and elongation at break, polluted water quality, etc. , to achieve the effect of high hardness ductility, good weather resistance, simple and fast preparation process

Active Publication Date: 2022-07-12
湖州合达图宏新材料技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the defect that the tensile strength and elongation at break of existing emulsified asphalt are generally low, and counterions such as sodium ions, ammonium ions, chloride ions, sulfate radicals and sulfite ions are polluted water quality problem

Method used

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  • Vinyl chloride acrylate copolymer modified water-based asphalt and preparation method thereof
  • Vinyl chloride acrylate copolymer modified water-based asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of soap solution:

[0041] The water of 250 grams is heated to 50 ℃, and the vinyl chloride of 25.5g (supplier, Shanghai Mokai Biotechnology Co., Ltd.; purity 0.2mg / mL in MeOH) is added, and the butyl acrylate of 5.1 grams is added successively after stirring and dissolving (supply). Shang, Shanghai Titan; specification, bottle; purity ≥ 99.0%) and 2.55g of glycidyl methacrylate, then add 1.3 g of ammonium persulfate (supplier, Shanghai Titan; specification 19333477 purity ≥ 98%) initiator, and finally Add 6g of sodium dodecyl sulfate (supplier, Shanghai Titan; specification 19333042 purity ≥88.0%) and polyvinyl alcohol (supplier, Shanghai Titan; specification 19333774 1788 type) composite emulsifier, stir and mix at a speed of 300r / min for 10min , and react at 40-50° C. for 4 hours to obtain a vinyl chloride-butyl acrylate-glycidyl methacrylate aqueous emulsion with a viscosity of 3000 mPa.s, that is, a soap solution.

Embodiment 2

[0043] Preparation of maleic anhydride pitch:

[0044] 400g base asphalt is heated to 140-160°C, 2-10wt% maleic anhydride is added based on the weight of the base asphalt, and 1% initiator is added based on the weight of the maleic anhydride, and the mixture is sheared and stirred at 8000r / min. React at 140-160°C for 4-6h to obtain maleic anhydride modified asphalt.

[0045] Table 1 Preparation of different maleic anhydride pitches

[0046] Experiment number Maleic anhydride (g) Ammonium persulfate (g) Softening point (g) 1 8 0.08 48 2 16 0.16 52 3 24 0.24 53 4 32 0.32 56 5 40 0.40 58

Embodiment 3

[0048] Preparation of vinyl chloride / acrylate copolymer modified water-based asphalt:

[0049] The maleic anhydride pitch obtained in experiment number 3 in Example 2 was added to the soap solution obtained in Example 1, and then a drier with an emulsion weight of 0.1-3wt% was added, and sheared for 15min at a rotating speed of 8000r / min, The vinyl chloride / acrylate copolymer modified water-based asphalt in the emulsion state is obtained.

[0050] Table 2 Performance comparison of prepared products of various vinyl chloride / acrylate copolymer modified water-based asphalts

[0051]

[0052] It can be seen from Table 1 that when the maleic anhydride pitch is prepared, the softening point increases with the increase of the maleic anhydride pitch content.

[0053] It can be seen from Table 2 that the asphalt product of the present invention has a tensile strength of more than 1 MPa, and an elongation at break of more than 150%, and has relatively high mechanical properties. T...

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Abstract

The invention discloses a method for preparing a vinyl chloride / acrylate copolymer modified water-based asphalt, which is characterized in that a vinyl chloride aqueous dispersion is prepared, butyl acrylate, glycidyl methacrylate and a catalyst are added, and the obtained mixture is adding an emulsifier to obtain a vinyl chloride-butyl acrylate-glycidyl methacrylate aqueous emulsion; heating the base asphalt, adding maleic anhydride and an initiator to obtain a maleic anhydride modified asphalt; adding the maleic anhydride modified asphalt adding a drier to the vinyl chloride-butyl acrylate-glycidyl methacrylate aqueous emulsion to obtain a vinyl chloride / acrylate copolymer modified aqueous asphalt in an emulsion state. The asphalt preparation process of the invention is simple and fast, and the product has high tensile strength and elongation at break, and good flame retardant performance, and a composite emulsifier with good performance is used in the production process, which has wide application. prospect.

Description

technical field [0001] The invention relates to a method for preparing a new type of asphalt material, in particular to a method for preparing a vinyl chloride / acrylate copolymer modified water-based asphalt, which belongs to the field of road construction. Background technique [0002] With the development of highway infrastructure, the asphalt industry, which is an irreplaceable material for highway infrastructure, has also made great technological progress. With the continuous improvement of asphalt application level, the deficiencies of traditional hot asphalt have also begun to appear. For example, the asphalt condensation speed is too fast, and it needs to be heated repeatedly during use, resulting in a lot of energy waste and environmental pollution. Repairs will inevitably result in a serious shortage of resources. The investigation and study found that the research and application of asphalt emulsifier is one of the effective ways to solve the above problems. Comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/00C08L27/06C08F289/00C08F222/06C08F214/06C08F220/18C08F220/32
Inventor 欧阳春发魏佳君吴修春李伟高群
Owner 湖州合达图宏新材料技术股份有限公司
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