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SBS modified asphalt

A technology of modified asphalt and matrix asphalt, used in building components, building insulation materials, buildings, etc., can solve the problems of poor weather resistance, aging, cracking, etc., and achieve excellent flexibility, improved weather resistance, and increased impact resistance. Effect

Inactive Publication Date: 2019-05-31
南京国路沥青有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the modified asphalt is affected by the climate for a long time when it is used in road construction, the existing SBS modified asphalt is still prone to cracking, deformation, poor weather resistance and aging after a long period of use. question

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The highly weather-resistant SBS asphalt modifier comprises the following parts by weight: 46 parts of SBS matrix; 15 parts of high-density polyethylene; 9 parts of ultraviolet absorber; 7 parts of dispersant.

[0033] Among them: the average relative molecular mass of the SBS matrix is ​​140,000, the mass ratio of styrene to butadiene in the SBS matrix is ​​1.2, and the density of high-density polyethylene is 0.935g / cm 3 ;

[0034] The ultraviolet absorber is 2,4-dihydroxybenzophenone and hindered amine, and the mass ratio of hindered amine and 2,4-dihydroxybenzophenone is 2;

[0035] The dispersant is vinyl bis stearamide.

[0036] The preparation method of high weather resistance SBS asphalt modifier comprises the following steps:

[0037] Stir the SBS matrix at a temperature of 135° C. for 75 minutes to obtain a SBS melt;

[0038] Add 5 parts of high-density polyethylene into the SBS melt every 10 minutes, raise the temperature to 150°C, and stir for 90 minutes. ...

Embodiment 2

[0044] The highly weather-resistant SBS asphalt modifier comprises the following parts by weight: 50 parts of SBS matrix; 20 parts of high-density polyethylene; 10 parts of ultraviolet absorber; and 10 parts of dispersant.

[0045] Among them: the average relative molecular mass of the SBS matrix is ​​150,000, the mass ratio of styrene to butadiene in the SBS matrix is ​​1.5, and the density of high-density polyethylene is 0.938g / cm 3 ;

[0046] The ultraviolet absorber is 2,4-dihydroxybenzophenone and hindered amine, and the mass ratio of hindered amine and 2,4-dihydroxybenzophenone is 3;

[0047] The dispersant is vinyl bis stearamide.

[0048] The preparation method of high weather resistance SBS asphalt modifier comprises the following steps:

[0049] Stir the SBS matrix at a temperature of 139°C for 70 minutes to obtain a SBS melt;

[0050] Add 4 parts of high-density polyethylene into the SBS melt every 10 minutes, raise the temperature to 155 ° C, and stir for 60 min...

Embodiment 3

[0056] The highly weather-resistant SBS asphalt modifier comprises the following parts by weight: 55 parts of SBS matrix; 25 parts of high-density polyethylene; 12 parts of ultraviolet absorber; and 12 parts of dispersant.

[0057] Among them: the average relative molecular mass of the SBS matrix is ​​180,000, the mass ratio of styrene to butadiene in the SBS matrix is ​​2, and the density of high-density polyethylene is 0.939g / cm 3 ;

[0058] The ultraviolet absorber is 2,4-dihydroxybenzophenone and hindered amine, and the mass ratio of hindered amine and 2,4-dihydroxybenzophenone is 4;

[0059] The dispersant is vinyl bis stearamide.

[0060] The preparation method of high weather resistance SBS asphalt modifier comprises the following steps:

[0061] Stir the SBS matrix at a temperature of 140°C for 60 minutes to obtain a SBS melt;

[0062] Add 5 parts of high-density polyethylene into the SBS melt every 10 minutes, raise the temperature to 155°C, and stir for 70 minutes...

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Abstract

The invention discloses SBS modified asphalt, which relates to the field of modified asphalt and aims to solve the problem of poor weather resistance of the existing SBS modified asphalt. The technical key points of the SBS modified asphalt comprise the following parts by weight: 95-125 parts of matrix asphalt; 23-45 parts of SBS asphalt modifiers with high weatherability; 12-25 parts of rubber oil; 9-21 parts of shielding anti-ultraviolet agents; 12-25 parts of bonding agents; and 10-26 parts of asphalt stabilizers. By adding the SBS asphalt modifiers with high weatherability and other functional additives, the weatherability of the SBS modified asphalt can be effectively improved, and the service life of the SBS modified asphalt is prolonged.

Description

technical field [0001] The invention relates to the field of modified asphalt, more specifically, it relates to a kind of SBS modified asphalt. Background technique [0002] Modified asphalt is the addition of external additives (modifiers) such as rubber, resin, high molecular polymer, ground rubber powder or other fillers, or taking measures such as mild oxidation of asphalt to make asphalt or asphalt mixture There are two mechanisms of modified asphalt, one is to change the chemical composition of asphalt, and the other is to make the modifier evenly distributed in the asphalt to form a certain spatial network structure. [0003] Among them, SBS modified asphalt has excellent high-temperature anti-rutting, low-temperature anti-cracking, anti-fatigue performance and excellent elastic recovery ability. It is mainly used in high-grade pavements such as the upper layer of expressways, heavy traffic and road sections with many overloaded vehicles. Based on With the above exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L23/06C08L91/00C08L23/28C08K13/02C08K5/20C08K5/132C08K5/098
Inventor 钱成来
Owner 南京国路沥青有限公司
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