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Stabilizer for SBS (styrene butadiene styrene) modified asphalt and preparation method thereof

A technology of modified asphalt and stabilizer, applied in building components, building insulation materials, buildings, etc., can solve problems such as unsatisfactory stabilization effect, lack of versatility, and cumbersome feeding process, and achieve good applicability, good effect, Actionable effect

Active Publication Date: 2013-10-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stabilizer is effective for small test modified asphalt with less than 6% SBS, and is not universal; the feeding process is cumbersome and the operating environment is poor;
[0008] Patent No.: 00123513.3 Guo Shuhua; Huang Weiqi; Wang Zijun; Zhang Baichun; She Yucheng; Sinopec Research Institute of Petrochemical Sciences; A preparation method of modified asphalt to improve storage stability, adding vulcanization accelerators as morpholines Or thiuram compounds, adding polar compounds, acidic compounds, etc. to change the polarity of asphalt; the operating environment is poor, the process is cumbersome, and the process time is long. SBS needs to be pretreated for 5-7 small tests in advance, and the reaction time is 1 -6 hours; and the stabilization effect is not ideal, the segregation test result is around 2°C, which is not universal;

Method used

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  • Stabilizer for SBS (styrene butadiene styrene) modified asphalt and preparation method thereof
  • Stabilizer for SBS (styrene butadiene styrene) modified asphalt and preparation method thereof
  • Stabilizer for SBS (styrene butadiene styrene) modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw asphalt is Huanxiling AH-110, with a penetration of 112. Take 1000 grams of sample, add 55 grams of SBS, and add 2.5 grams of stabilizer (including 0.75 grams of sulfur, 1.0 grams of aromatic oil, 0.5 grams of carbon black, and 0.25 grams of polystyrene) , shear at high speed with an emulsifying disperser for 40-60 minutes, and the reaction temperature is 170-185°C, and the asphalt sample obtained is No. 1. The performance analysis results are shown in Table 2, meeting the technical requirements of I-B in JTG F40-2004.

Embodiment 2

[0022] Raw asphalt is Huanxiling AH-110, with a penetration of 112. Take 1000 grams of sample, add 65 grams of SBS, and add 2.5 grams of stabilizer (including 0.75 grams of sulfur, 1.0 grams of aromatic oil, 0.5 grams of carbon black, and 0.25 grams of polystyrene) ,, High-speed shearing with emulsifying disperser for 40-60 minutes, the reaction temperature is 170-185 ° C, the asphalt sample obtained is No. 2. The performance analysis results are shown in Table 2, meeting the technical requirements of I-C in JTGF40-2004.

Embodiment 3

[0024] Raw asphalt is Huanxiling AH-110, with a penetration of 112. Take 1000 grams of sample, add 75 grams of SBS, and add 2.5 grams of stabilizer (including 0.75 grams of sulfur, 1.0 grams of aromatic oil, 0.5 grams of carbon black, and 0.25 grams of polystyrene) ,, High-speed shearing with emulsifying disperser for 40-60 minutes, the reaction temperature is 170-185 ° C, the asphalt sample obtained is No. 3. The performance analysis results are shown in Table 2, meeting the technical requirements of I-C in JTGF40-2004.

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Abstract

The invention relates to a stabilizer for SBS (styrene butadiene styrene) modified asphalt and a preparation method thereof. The stabilizer comprises the following components in parts by weight: 6-30 parts of sulfur, 6-15 parts of phenyl olefin polymers, 30-40 parts of aromatic hydrocarbon thick oil and 10-40 parts of dispersed carrier substances. The preparation method comprises the following steps of: adding the components into an internal mixer at 180 DEG C, carrying out blending and internal mixing, and carrying out extruding, pelleting and cooling. The stabilizer is used for producing high-proportion SBS modified asphalt and high-viscosity asphalt and has the advantages that an isolation test result is lower than 2.5 DEG C, the softening point can reach 70-90 DEG C, and technical requirements in industry specifications of ministry of communications, namely 'Standard Specification for Construction and Acceptance of Highway Asphalt Pavements' (JTG F40-2004) are met.

Description

technical field [0001] The invention relates to a stabilizer of SBS modified asphalt suitable for the production of various straight-run petroleum asphalts and a preparation method thereof, which solves the problem of segregation of SBS modified asphalt and belongs to the field of petrochemical industry. Background technique [0002] Due to the large molecular weight difference between asphalt and polymer polystyrene-butadiene (SBS), the thermal storage stability of SBS modified asphalt is poor, and the results of segregation tests cannot meet the technical requirements. The stabilization technology of polymer modified asphalt has always been a difficult technical problem. [0003] The current research mainly adds sulfur to the asphalt, and under certain reaction conditions, the cross-linking reaction of SBS occurs. Because asphalt has a certain polarity and can be partially compatible with SBS, the interfacial energy can be reduced through the cross-linking reaction of SBS...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L25/02C08K13/02C08K5/01C08K3/04C08K3/36C08K3/34C08K3/06
Inventor 曹朋云相养冬于洋刘海澄张华
Owner PETROCHINA CO LTD
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