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A kind of anti-aging plastic body modified asphalt coating material and preparation method thereof

A body modification and anti-aging technology, used in building thermal insulation materials, building components, buildings, etc., can solve the problem that antioxidants cannot be effective for a long time in the anti-aging effect of asphalt, and the effect of thermal-oxidative aging performance of asphalt is not obvious and reduces. Anti-thermal oxidation aging ability and other problems, to achieve the effect of improving anti-ultraviolet aging performance and improving anti-thermal oxidation aging ability

Inactive Publication Date: 2016-01-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN102199359A proposes to add magnesium-aluminum-based layered double hydroxide to asphalt, and utilize the physical shielding effect of magnesium-aluminum-based layered double hydroxide on ultraviolet rays to improve the anti-ultraviolet aging ability of plastic modified asphalt, but asphalt is used In the process, in addition to the aging caused by ultraviolet light, thermal and oxygen aging will also occur under the action of heat and oxygen, and the effect of magnesium-aluminum-based layered double hydroxide on improving the thermal and oxygen aging resistance of asphalt is not obvious
Adding antioxidants to asphalt can improve the thermal and oxidative aging resistance of asphalt to a certain extent, but since antioxidants are low molecular weight organic compounds, they are easily volatilized by heat when mixed with hot asphalt under high temperature conditions, and their It will also reduce the anti-thermal oxygen aging ability due to aging, so that the anti-aging effect of antioxidants on asphalt cannot be effective for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 2 parts (parts by mass, the same below) of antioxidant intercalated magnesium-aluminum-based layered double hydroxy composite metal hydroxide to 59 parts of asphalt (softening point 46°C, penetration 85dmm) that has been heated to 180°C, Keep the temperature at 180℃, stir in a high-shear mixer at 4000rpm for 0.5 hours, add 12 parts of random polypropylene, keep the temperature at 180℃, stir at 2000rpm for 1 hour, heat up to 190℃, add 27 A portion of fly ash (with a particle size of 200 mesh) is stirred at 1000 rpm for 2 hours to obtain an aging resistant plastic body modified asphalt coating material.

[0022] In the ultraviolet aging test chamber (ultraviolet intensity is 1200μW / cm 2 , The aging temperature is 60℃, the aging time is 6 days, the following UV aging method is the same) and the thermal oxygen aging test box (the thermal oxygen aging temperature is 70℃, the aging time is 12 days, the following thermal oxygen aging method is the same) The aging-resistant pl...

Embodiment 2

[0024] Add 4 parts of antioxidant intercalation modified layered bishydroxy composite metal hydroxide to 56 parts of pitch (softening point 46℃, penetration 85dmm) that has been heated to 180℃, keep the temperature at 180℃, Stir for 0.5 hour at 4500rpm under high shear mixer, add 14 parts of random polypropylene, keep the temperature at 180℃, stir at 2000rpm for 1 hour, then heat up to 190℃, add 26 parts of fly ash (particles) The diameter is 150 meshes), the stirring speed is adjusted to 1500 rpm, and stirring is carried out for 2 hours to obtain an aging resistant plastic body modified asphalt coating material.

[0025] Ultraviolet aging and thermal oxidizing aging tests were performed on the aging resistant plastic body modified asphalt coating material in the ultraviolet aging test box and the thermal oxygen aging test box. The softening point of the aging-resistant plastic body modified asphalt coating material before and after UV aging and thermal oxidative aging increased ...

Embodiment 3

[0027] Add 5 parts of antioxidant intercalated magnesium-aluminum-based layered double-hydroxy composite metal hydroxide to 59 parts of pitch (softening point 48.7°C, penetration 78dmm) that has been heated to 180°C, and keep the temperature at 180°C. Stir at 3500rpm for 0.5 hour under high shear mixer, add 4 parts of random polypropylene and 4 parts of amorphous olefin copolymer, keep the temperature at 180℃, stir at 1500rpm for 1 hour, heat up to 190℃, add 28 parts of fly ash (particle size of 100 mesh), control the stirring speed to 1000 rpm, stir for 3 hours to obtain an aging resistant plastic body modified asphalt coating material.

[0028] Ultraviolet aging and thermal oxidizing aging tests were performed on the aging resistant plastic body modified asphalt coating material in the ultraviolet aging test box and the thermal oxygen aging test box. The softening point of the aging-resistant plastic body modified asphalt coating material before and after UV aging and thermal o...

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Abstract

The invention relates to anti-aging plastomer modified asphalt coating materials and a preparation method of the anti-aging plastomer modified asphalt coating materials. The anti-aging plastomer modified asphalt coating materials are characterized by comprising, by mass, 50%-66% of asphalt, 8%-14% of plasticity modifying agents, 1%-6% of antioxidant intercalation magnalium base layer double-hydroxyl composite metal hydroxide and 25%-30% of padding. According to the anti-aging plastomer modified asphalt coating materials and the preparation method of the anti-aging plastomer modified asphalt coating materials, the prepared antioxidant intercalation magnalium base layer double-hydroxyl composite metal hydroxide is added into plastomer modified asphalt; due to the facts that the magnalium base layer double-hydroxyl composite metal hydroxide has the good physical shielding effect to ultraviolet rays, and interlayer antioxidants have the effect for blocking free radical chain reaction in the plastomer modified asphalt ageing process, the ultraviolet aging resistant capacity and thermo-oxidative aging resistant capacity of the plastomer modified asphalt coating materials are improved, and the anti-aging capacity of the prepared plastomer modified asphalt coating materials is significantly improved.

Description

Technical field [0001] The invention relates to an aging resistant plastic body modified asphalt coating material for waterproof coiled materials and a preparation method thereof. Background technique [0002] Building waterproof materials are an important type of building materials. Asphalt-based waterproof materials are widely used because of their excellent waterproof performance and low price. The current consumption accounts for more than 70% of my country's total waterproof materials. The properties of asphalt-based waterproofing materials mainly depend on the asphalt coating material used. The plastic modified asphalt coating material has no flow at high temperature and no brittleness at low temperature, and can well adapt to the deformation of the base layer. It has become the most important asphalt. One of the coating materials. However, the roof waterproofing project is affected by natural environmental factors such as ultraviolet light, heat, oxygen, etc. The plastic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L23/12C08L23/00C08K9/04C08K3/22
Inventor 余剑英徐松但维李汶卒贾晓娟付靖宜艾平松
Owner WUHAN UNIV OF TECH
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