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High-efficiency epoxy-based heat-reflecting coating for asphalt pavement

A technology of asphalt pavement and heat reflection, applied in the field of coatings, can solve the problems of reduced heat reflection performance of coatings, damage to reflective coatings, etc., to achieve the effect of increasing the surface area

Inactive Publication Date: 2021-11-05
ANHUI XINDALU SPECIAL PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN2020112037820 discloses polyurethane heat-reflective coatings and their preparation methods and uses. The emissive coatings use phase-change polyurethane resins with a specific structure as the resin base material, so that the coatings not only have good temperature regulation functions, but also have good wear resistance. ; But when the reflective coating is applied to the asphalt pavement, the vehicle will generate a backward friction and a downward pressure on the asphalt pavement during driving, and the friction and pressure will produce a downward composite force, which will damage the reflection Coating of paint, resulting in a reduction in the heat reflective properties of the paint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-efficiency epoxy-based heat-reflective paint for asphalt pavement, specifically comprising the steps of:

[0040] 1) Select calcium nitrate tetrahydrate and ammonium hydrogen phosphate as the calcium source and phosphorus source respectively, prepare the solution according to the molar ratio of Ca and P as 10:6, and then mix it with urea aqueous solution to adjust the pH value of the solution to 3. Add a certain amount of silver nitrate powder, control the atomic ratio of Ag / Ag+Ca to 2%, and the atomic ratio of Ca+Ag / P to 1.5, stir evenly, set the hydrothermal reaction temperature to 160°C, and the reaction time to 3h, the obtained The product was washed repeatedly with deionized water and alcohol, and dried in an oven at 80°C to obtain silver-doped hydroxyapatite micro-nanofibers;

[0041] 2) Add 5.5g antimony chloride to 600mL distilled water, stir at 150r / min for 10min, then add 7.6g sodium thiosulfate and 2.0g polyvinylpyrrolidone, continue stirring for 30min...

Embodiment 2

[0047] A high-efficiency epoxy-based heat-reflective paint for asphalt pavement, specifically comprising the steps of:

[0048] 1) Select calcium nitrate tetrahydrate and ammonium hydrogen phosphate as the calcium source and phosphorus source respectively, prepare the solution according to the molar ratio of Ca and P as 10:6, and then mix it with urea aqueous solution to adjust the pH value of the solution to 3.5. Add a certain amount of silver nitrate powder, control the atomic ratio of Ag / Ag+Ca to 5%, and the atomic ratio of Ca+Ag / P to 1.6, stir evenly, set the hydrothermal reaction temperature to 170°C, and the reaction time to 5h, the obtained The product was washed repeatedly with deionized water and alcohol, and dried in an oven at 80°C to obtain silver-doped hydroxyapatite micro-nanofibers;

[0049] 2) Add 6g antimony chloride into 700mL distilled water, stir at 200r / min for 10min, then add 8g sodium thiosulfate and 2.5g polyvinylpyrrolidone, continue stirring for 35min...

Embodiment 3

[0055] A high-efficiency epoxy-based heat-reflective paint for asphalt pavement, specifically comprising the steps of:

[0056] 1) Select calcium nitrate tetrahydrate and ammonium hydrogen phosphate as the calcium source and phosphorus source respectively, prepare the solution according to the molar ratio of Ca and P as 10:6, and then mix it with urea aqueous solution to adjust the pH value of the solution to 4. Add a certain amount of silver nitrate powder, control the atomic ratio of Ag / Ag+Ca to 8%, and the atomic ratio of Ca+Ag / P to 1.7, stir evenly, set the hydrothermal reaction temperature to 180°C, and the reaction time to 6h, the obtained The product was washed repeatedly with deionized water and alcohol, and dried in an oven at 80°C to obtain silver-doped hydroxyapatite micro-nanofibers;

[0057] 2) Add 6.5g antimony chloride to 800mL distilled water, stir at 230r / min for 15min, then add 8.3g sodium thiosulfate and 3.0g polyvinylpyrrolidone, continue stirring for 40min...

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Abstract

The invention discloses a high-efficiency epoxy-based heat-reflecting coating for an asphalt pavement, and relates to the technical field of coatings, and the high-efficiency heat-reflecting coating is prepared from the following raw materials in parts by weight: 100-120 parts of waterborne epoxy emulsion, 6-8 parts of precipitated phase silicon dioxide, 2-3 parts of hollow microspheres, 0.3-0.5 part of a defoaming agent, 0.2-0.6 part of a dispersing agent, 15-25 parts of hybrid sol and 80-90 parts of a curing agent. According to the invention, the hybrid sol is introduced into a water-borne epoxy resin system, and the hybrid sol can form a hybrid membrane with a stable structure in the water-borne epoxy resin system, so that the phenomenon that the heat reflectivity of the water-borne epoxy resin is reduced is not easy to occur under the external action; therefore, the water-borne epoxy resin-based heat reflection coating is coated on an asphalt pavement, has a long-term stable heat reflection effect, and can realize a stable pavement cooling effect for a long time.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a high-efficiency epoxy-based heat-reflecting coating for asphalt pavement. Background technique [0002] Asphalt pavement has the advantages of high smoothness, good comfort, and low noise. In road construction in my country, asphalt pavement is being widely used. Asphalt pavement is widely used in urban roads due to its short construction period and easy maintenance. However, asphalt has heat-absorbing characteristics, and the absorption rate of solar radiation is as high as 85-95%, resulting in the temperature of asphalt pavement reaching above 60°C in summer; And because asphalt is a kind of thermoplastic material, it will become soft and sticky after absorbing heat. Under the long-term action of vehicle load, problems such as rutting, wrapping, and cracking will occur, which not only affect the normal use of asphalt pavement, but also exacerbate the "urban heat island." Ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D5/33C09D7/61
CPCC09D163/00C09D5/004C09D7/61C08K2003/2244C08K2003/3009C08K7/08C08K3/22C08K3/36C08K9/12C08K3/30C08K7/00
Inventor 王保军拾振洪李海洋金传亮回留柱王家振
Owner ANHUI XINDALU SPECIAL PAINT CO LTD
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