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Aging resistant SBS modified asphalt and preparation method thereof

A modified asphalt, anti-aging technology, used in building components, building thermal insulation materials, construction and other directions, can solve the problem of not being able to improve the anti-aging performance of modified asphalt, so as to improve the anti-oxidation ability, slow down aging, improve The effect of antioxidant properties

Active Publication Date: 2019-02-01
湖北津泰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical solution disclosed in this patent only focuses on the anti-ultraviolet performance of modified asphalt, and the physical factor of the aging of modified asphalt is not only ultraviolet rays, so improving the anti-ultraviolet performance of modified asphalt cannot be well improved. aging resistance

Method used

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  • Aging resistant SBS modified asphalt and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of aging-resistant SBS modified asphalt is prepared through the following steps:

[0027] Step 1. Weigh the raw materials in the following parts by weight: 90 parts of matrix asphalt, 3 parts of SBS modifier, 0.5 part of arabinoxylan-chitosan compound, poly(dicyclopentadiene-co-p-cresol ) 1 part, pentaerythritol tetrakis (2-cyano-3,3-diphenylacrylate) 2 parts, decylacrylonitrile dimethylsiloxane 0.2 part and 4-benzoyloxy-2,2,6 , 0.3 parts of 6-tetramethylpiperidine;

[0028]Step 2: Heat the base asphalt to 135-145°C, add SBS modifier, arabinoxylan-chitosan complex, poly(dicyclopentadiene-co-p-cresol), pentaerythritol to the base asphalt Tetrakis(2-cyano-3,3-diphenylacrylate), decylacrylonitrile dimethylsiloxane and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, Raise the temperature to 170-190°C, keep the reaction temperature, stir for 20-30min, mix the raw materials evenly, grind in the colloid mill for 0.5-1h, stop the colloid mill, keep the reaction temperature...

Embodiment 2

[0030] A kind of aging-resistant SBS modified asphalt is prepared through the following steps:

[0031] Step 1, take the raw materials by the following parts by weight: 100 parts of base asphalt, 5 parts of SBS modifier, 3.5 parts of arabinoxylan-chitosan complex, poly(dicyclopentadiene-co-p-cresol ) 5 parts, polyacrylamide methylbenzylidene camphor 3 parts, decylacrylonitrile dimethyl siloxane 0.7 part and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine 0.8 copies;

[0032] Step 2: Heat the base asphalt to 135-145°C, add SBS modifier, arabinoxylan-chitosan compound, poly(dicyclopentadiene-co-p-cresol), poly(dicyclopentadiene-co-p-cresol) to the base asphalt Acrylamidomethylbenzylidene camphor, decylacrylonitrile dimethylsiloxane and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, heat up to 170-190°C, keep Reaction temperature, stirring for 20-30 minutes to mix all raw materials evenly, grinding in the colloid mill for 0.5-1 hour, after stopping the colloid mill, keep the reaction t...

Embodiment 3

[0034] A kind of aging-resistant SBS modified asphalt is prepared through the following steps:

[0035] Step 1, take the raw materials by the following parts by weight: 95 parts of base asphalt, 4 parts of SBS modifier, 2 parts of arabinoxylan-chitosan compound, poly(dicyclopentadiene-co-p-cresol ) 3 parts, 3,4'-methylbenzylidene camphor 2.5 parts, decylacrylonitrile dimethylsiloxane 0.5 parts and 4-benzoyloxy-2,2,6,6-tetramethylpiper 0.5 parts of pyridine;

[0036] Step 2, heating the base asphalt to 135-145°C, adding SBS modifier, arabinoxylan-chitosan complex, poly(dicyclopentadiene-co-p-cresol), 3 ,4'-Methylbenzylidene camphor, decylacrylonitrile dimethylsiloxane and 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, heat up to 170~190°C, Keep the reaction temperature, stir for 20-30 minutes, mix all raw materials evenly, grind in the colloid mill for 0.5-1 hour, after stopping the colloid mill, keep the reaction temperature at 170-190°C, and continue stirring for 2-3 hours to ...

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Abstract

Belonging to the technical field of modified asphalt, the invention discloses an aging resistant SBS modified asphalt and a preparation method thereof. The aging resistant SBS modified asphalt comprises the following components by weight: 90-100 parts of matrix asphalt, 3-5 parts of an SBS modifier, 0.5-3.5 parts of an oxygen barrier agent, and 1-5 parts of an antioxidant. The oxygen barrier agentis an arabinoxylan-chitosan compound. The arabinoxylan-chitosan compound on the one hand can form an oxygen barrier layer to separate oxygen from asphalt and prevent oxidation reaction of asphalt when contacting oxygen, thus slowing down asphalt aging; and on the other hand, the arabinoxylan-chitosan compound can cooperate with the antioxidant to scavenge the free radicals generated by active groups in the asphalt autoxidation process and prevent reaction of the free radicals with oxygen molecules, thus effectively slowing down the autoxidation aging of asphalt. At the same time, under the synergistic action of an ultraviolet barrier agent and a light stabilizer, the whole SBS modified asphalt system has excellent aging resistance.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, in particular to an aging-resistant SBS modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement has the advantages of comfortable driving, low energy consumption and easy maintenance, etc., and its proportion in road construction is getting higher and higher. However, ordinary asphalt has poor high and low temperature performance, and the road paved with it is prone to defects such as ruts and potholes, and has a short service life, especially under heavy traffic conditions. To solve this problem, polymers are usually used to modify asphalt, so as to improve the road performance of asphalt mixture. Among them, styrene-butadiene-styrene triblock copolymer (SBS) is a linear or star-shaped block copolymer synthesized from styrene and butadiene, which belongs to a typical thermoplastic elastomer. . SBS can form a network structure in asphalt throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L87/00C08K5/13C08K5/544C08K5/3435
CPCC08L95/00C08L2201/08C08L2205/035C08L53/02C08L87/005C08K5/13C08K5/544C08K5/3435
Inventor 宗博
Owner 湖北津泰环保科技有限公司