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Stabilizer composition for polymer modified asphalt

A technology of modified asphalt and stabilizer, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problems of polymer and matrix asphalt segregation, uneven dispersion, and easy gelation, etc., and achieve low price, The raw materials are easy to obtain, and the effect is simple and convenient to use

Active Publication Date: 2015-05-13
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a polymer modified asphalt stabilizer composition, which can solve the problem that the polymer and matrix asphalt are prone to segregation during the production and storage of polymer modified asphalt, and other stabilizers During the cross-linking process, the cross-linking speed is slow, the dispersion is uneven, and the problem of gel is prone to occur

Method used

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  • Stabilizer composition for polymer modified asphalt
  • Stabilizer composition for polymer modified asphalt
  • Stabilizer composition for polymer modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 95.2% AH-90 (Korean SK asphalt, see Table 1 for basic properties) in a container with a stirring device, heat it to a fluid state, add 4% SBS (YH-791 type produced by Yueyang Petrochemical), at 170 ° C High-speed shear dispersion for 20 minutes (speed: 4500r / min), after heating up to 190°C, add 0.8% stabilizer composition, including 0.2% stearic acid, 0.3% naphthenic acid ethylene glycol ester (NAEP), and 0.3% sulfur After mixing for 60 minutes, modified asphalt was obtained (see Table 3 for the property analysis results of modified asphalt), and the obtained SBS modified asphalt index met the technical requirements of I-C polymer modified asphalt in JTG F40-2004 "Technical Construction Specifications for Highway Asphalt Pavement".

Embodiment 2

[0024] Add 94% AH-90 (SK asphalt, see Table 1 for basic properties) in a container with a stirring device, heat it to a fluid state, add 5% SBS (YH-791 type produced by Yueyang Petrochemical), and heat it at a high speed at 180°C Shear and disperse for 30min (rotating speed: 4500r / min), add 1.0% stabilizer composition after heating up to 180°C, wherein 0.2% phosphoric acid, pentaerythritol naphthenate (molecular formula is [C 6 h 5 (CH 2 ) 10 COOCH 2 ] 2 -C(CH 2 Oh) 2) 0.4%, powdered sulfur 0.4%, mixed for 90 minutes to obtain modified asphalt (see Table 3 for the property analysis results of modified asphalt), and the obtained SBS modified asphalt index meets the I-C polymerization in "Technical Construction Specifications for Highway Asphalt Pavement" JTG F40-2004 Technical requirements for chemically modified asphalt.

Embodiment 3

[0026] Add 95% AH-90 (Sinopec asphalt, see Table 1 for basic properties) in a container with a stirring device, add 4% SBS (YH-791 type produced by Yueyang Petrochemical), and disperse at high speed for 40 minutes at 180 ° C ( Speed: 4500r / min), after heating up to 185°C, add 1.0% stabilizer composition, including 0.2% pyrophosphoric acid, 0.5% sorbitan monooleate, and 0.3% insoluble sulfur, and mix for 30 minutes to obtain modified asphalt (The analysis results of modified asphalt properties are shown in Table 3). The obtained SBS modified asphalt index meets the technical requirements of I-C polymer modified asphalt in "Technical Construction Specifications for Highway Asphalt Pavement" JTGF40-2004.

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Abstract

The invention provides a stabilizer composition for polymer modified asphalt, which comprises a dispersion stabilizer and a crosslinking reactant, wherein the dispersion stabilizer comprises acid and polybasic alcohol ester, and the mass percent is 10-90%; and the crosslinking reactant is one or a mixture of sulfur and a compound, peroxide, inorganic metal oxide thereof, and the mass percent is 10-90%. In the production process of polymer modified asphalt, the stabilizer composition can be directly used, i.e. the stabilizer composition can be sequentially added during physical shearing and grinding; and the stabilizer composition can also be sequentially added after shearing and grinding, wherein the added stabilizer composition accounts for 0.1-2% of the total amount of the polymer modified asphalt. After the stabilizer composition is added, the polymer modified asphalt has favorable storage stability, and the prepared modified asphalt has excellent high / low temperature property.

Description

technical field [0001] The invention relates to a preparation process for polymer modified asphalt, in particular to a preparation process of a stabilizer for polymer modified asphalt. Background technique [0002] Compared with cement concrete pavement, asphalt pavement has the advantages of smooth surface, no joints, comfortable driving, wear resistance, small vibration, low noise, short construction period, and easy maintenance and repair, so it has been more and more widely used. With the rapid development of the economy, the road mileage in my country will increase year by year. Taking Xinjiang as an example, the road mileage will double during the "Twelfth Five-Year Plan" period in the future. The quality requirements of road surfaces are also getting higher and higher. Ordinary asphalt is a material with strong temperature sensitivity. When the temperature drops to near the brittle point, the asphalt becomes glassy and loses flexibility, and the mixture is prone to br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L67/02C08K13/02C08K5/00C08K5/10C08K5/103C08K3/26C08K5/46C08K5/14C08K5/11C08K5/37
Inventor 蔺习雄毛三鹏熊良铨杨克红王援李荣于曙艳
Owner PETROCHINA CO LTD
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