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Anti-aging plastomer modified asphalt coating materials and preparation method thereof

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

Inactive Publication Date: 2013-12-04
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] 2 parts (by mass, the same below) of antioxidant-intercalated magnesium-aluminum-based bishydroxy composite metal hydroxide was added to 59 parts of asphalt (softening point 46°C, penetration 85dmm) that had been heated to 180°C, Keep the temperature at 180°C, stir at 4000rpm in a high shear mixer for 0.5 hours, add 12 parts of random polypropylene, keep the temperature at 180°C, stir at 2000rpm for 1 hour, raise the temperature to 190°C, add 27 Parts of fly ash (particle size of 200 mesh) were stirred at 1000 rpm for 2 hours to obtain an aging-resistant plastic body modified asphalt coating material.

[0022] In the UV aging test chamber (ultraviolet intensity is 1200μW / cm 2, the aging temperature is 60 ℃, the aging time is 6 days, the following ultraviolet aging methods are the same) and the thermo-oxidative aging test box (the thermo-oxidative aging temperature is 70 ℃, the aging time is 12 days, and the following thermo-oxidative aging methods are the same). The ag...

Embodiment 2

[0024] Add 4 parts of antioxidant intercalation modified layered bishydroxy composite metal hydroxide to 56 parts of asphalt (softening point 46 ℃, penetration 85dmm) that has been heated to 180 ℃, and keep the temperature at 180 ℃. Under the high shear mixer, stir at 4500rpm for 0.5 hours, add 14 parts of atactic polypropylene, keep the temperature at 180°C, stir at 2000rpm for 1 hour, then heat up to 190°C, add 26 parts of fly ash (granular) 150 mesh diameter), adjust the stirring speed to 1500 rpm, and stir for 2 hours to obtain an aging-resistant plastomer modified asphalt coating material.

[0025] The aging-resistant plastomer-modified asphalt coating material was subjected to ultraviolet aging and thermal-oxidative aging tests in an ultraviolet aging test chamber and a thermal-oxidative aging test chamber, respectively. The softening point of the aging-resistant plastomer-modified asphalt coating material before and after UV aging and thermal oxidation aging increased f...

Embodiment 3

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

[0028] The aging-resistant plastomer-modified asphalt coating material was subjected to ultraviolet aging and thermal-oxidative aging tests in an ultraviolet aging test chamber and a thermal-oxidative aging test chamber, respectively. The softening point of the aging-resistant plastomer-modified asphalt coating material before ...

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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 bitumen coating material for a waterproofing membrane and a preparation method thereof. Background technique [0002] Building waterproofing materials are an important type of building materials. Asphalt-based waterproofing materials are widely used because of their excellent waterproofing performance and low price. At present, the amount of asphalt-based waterproofing materials accounts for more than 70% of the total waterproofing materials in my country. The properties of asphalt-based waterproofing materials mainly depend on the asphalt coating material used. The plastic body modified asphalt coating material has become the most important asphalt coating material because it has the characteristics of non-flowing at high temperature and non-brittle cracking at low temperature. One of the coating materials. However, the roof waterproofing project is affected by natural factors such as ...

Claims

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Application Information

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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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