Special matrix asphalt for modified asphalt and its preparation method

A technology of base asphalt and modified asphalt, which is applied in the direction of chemically processing tar asphalt/petroleum asphalt/natural asphalt, etc., can solve problems such as poor compatibility of high molecular polymers, solve product segregation problems, fast reaction speed, increase The effect of asphaltene content

Inactive Publication Date: 2006-05-24
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structural composition of these asphalts has poor compatibility with high molecular polymers (SBS, SBR, etc.) because they have not been specially improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Add vacuum residual oil, propane deoiled asphalt, furfural extracted oil from catalytic cracking cycle oil, 0.1% industrial phosphoric acid and petroleum acid in the oxidation kettle in the proportion of 50%, 20%, and 30%, at 200°C Inject 3L / Kg.min of air at the bottom, the reaction time is 4 hours, oxidize into base asphalt, in the container, weigh 380g of base asphalt, add 20sSBS (Yuehua Dao-2), at 190°C, 4500r / min Cut at the shear speed for 30 minutes, rest for 20 minutes, and then cut at 190 for 30 minutes, that is the SBS modified asphalt product.

Embodiment 2-6

[0008] Embodiment 2-6 (see table 1)

[0009] sample

[0010] sample

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PUM

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Abstract

The present invention relates to a modified asphalt base asphalt prepared by catalytic oxidation process and its preparation method. ~28%, 30~35% are blended as raw materials, and 0.1~3.0% industrial phosphoric acid and petroleum acid are used as catalysts to obtain oxidation reactions. The present invention effectively improves the mutual polymerization or The speed and selectivity of the condensation reaction improve the compatibility and compatibility of asphalt and improver, and solve the problem of product segregation. Modified asphalt products with stable colloidal structure, high and low temperature performance and elastic recovery can be obtained without adding additives during shearing. The process also has the advantages of fast reaction speed and short oxidation time.

Description

Technical field: [0001] The invention relates to a styrene-butadiene-styrene block copolymer (SBS) thermoplastic elastomer or / and styrene-butadiene rubber (SBR) and other polymers modified by a catalytic oxidation process. Special matrix asphalt for preparing modified asphalt by shearing, grinding and mixing process and preparation method thereof Background technique: [0002] The preparation methods of modified asphalt can be divided into two categories: one is the mother liquor process. The modifier, asphalt and other additives are directly mixed together, and evenly mixed by a shearing machine or a uniform mill to form a finished modified asphalt. Most of the asphalt used in mother liquor method and direct shear method is vacuum residue, or processed road asphalt and ordinary oxidized asphalt. The structural composition of these asphalts has poor compatibility with high molecular polymers (SBS, SBR, etc.) because they have not been specially improved. That is, the asph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/04
Inventor 熊良铨罗来龙杨克红李剑新蔺习雄王金勤高华
Owner PETROCHINA CO LTD
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