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Stable polymer-asphalt composition

A kind of asphalt composition and polymer technology, applied in the direction of building structure, building components, building insulation materials, etc., can solve problems such as environmental pollution, complicated preparation process, and application restrictions

Inactive Publication Date: 2004-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, it can be seen that the storage stability of modified asphalt is a problem that needs to be solved when asphalt is modified. Although the above patents provide some solutions, they also have certain limitations, such as the preparation process is complicated. High equipment requirements, or pollution to the environment, so that its application is subject to certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The method for preparing the asphalt composition provided by the present invention is as follows: heating 88-97.9 parts (parts by weight) of asphalt to 120-220°C, preferably 150-200°C, and sequentially adding 1 to 5 parts (parts by weight) of A Type polymer, 1 to 5 parts (parts by weight) of type B polymer and 0.1 to 2 parts (parts by weight) of stabilizer, reacted under high shear for 0.5 to 4 hours, preferably 1 to 3 hours, The rotation speed is 500 to 5,000 revolutions per minute (rpm), preferably 1,000 to 3,000 rpm.

[0027] The present invention uses polymers of different composition or structure for compounding, and uses the complementary effects of their properties to prepare a polymer asphalt composition with good stability. Polymers with different compositions or structures have different properties after asphalt modification. Impact. Generally speaking, polymers with lower molecular weight or polar functional groups in the molecular structure have better compatibi...

Embodiment 1

[0038] This example illustrates that the present invention uses two different types of Class A polymers and Class B polymers to prepare a polymer asphalt composition with good storage stability.

[0039]Compared with Comparative Example 1, this example reduces the amount of SBS in Comparative Example 1 from 5 parts (parts by weight) to 3 parts, and adds 2 parts (parts by weight) of polyethylene wax with a lower molecular weight. The test results found that the difference in the segregation softening point of the sample was 1.2℃, indicating that the two polymers after compounding were dispersed and stable in the asphalt without segregation, and the softening point of the modified asphalt was greater than that of the base asphalt. The improvement indicates that after compounding polymers of different compositions and structures, a modified asphalt with stable storage and high temperature performance can be obtained.

Embodiment 2

[0041] Compared with Example 1, the polyethylene wax is replaced with glycidyl ester (Tianjin Jindong Chemical Plant). The test results show that a polymer asphalt composition with good storage stability and good high temperature performance can also be obtained.

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PUM

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Abstract

The stable polymer-asphalt composition includes: asphalt in 88-97.9 pts.wt.; polymer A is 1-5 pts.wt. polymer B in 1-5 pts.wt. and stabilizer in 0.1-2 pts.wt. The separation test on the composition shows that the composition has softening point difference within 2.5 deg.c. The product may be stored for long time without separation between the polymer and asphalt.

Description

Technical field [0001] The present invention relates to an asphalt material, more specifically, a stable polymer asphalt composition. Background technique [0002] As we all know, asphalt is an important road paving material. Some properties of asphalt can be modified by adding certain polymers to improve its performance. For example, USP 4,314,921 uses a special high-speed shear colloid mill to make polyethylene (PE ) Is dispersed in the asphalt to achieve the purpose of improving the performance of the asphalt. After the modification, the anti-high and low temperature ability and anti-aging ability of the modified asphalt are obviously enhanced. After the shearing action is stopped, the dispersed PE particles in the asphalt are easy to aggregate, resulting in the stratification of the PE phase and the asphalt phase, which is difficult to store stably, and has certain limitations. It is mainly used for on-site mixing methods to modify the asphalt. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
Inventor 佘玉成王子军龙军李锐郭淑华
Owner CHINA PETROLEUM & CHEM CORP