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Macromolecule wax for modified asphalt soft points for road and its uses

A technology of polymer wax and modified asphalt, which is used in building components, building insulation materials, buildings, etc., can solve the problems of increased viscosity, insufficient and weakened stability of modified asphalt at 135 °C

Inactive Publication Date: 2005-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experiments have shown that for every 1% increase in SBS, the softening point increases by about 2-3°C, and the effect is not obvious. On the contrary, it increases the viscosity of the modified asphalt at 135°C, and also makes the oil that promotes SBS dispersion in the modified asphalt system Parts tend to be insufficient, and the stability of the system is weakened

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add polyethylene wax with a molecular weight of 1000-2000, SBS with a molecular weight of 140000-160000, and sulfur to two parts of 1000 grams of No. 70 bitumen at a temperature of 160 °C as shown in the table below, and use a double-ring high-shear mixer to shear After cutting and stirring for 50 minutes, the obtained material was left to react at 180°C for 120 minutes to obtain the finished modified asphalt. The main performance indicators are shown in the data in the table below.

[0018] Comparative example 1

Embodiment 2

[0020] Add polypropylene wax with a molecular weight of 3,000 to 4,000, SBS with a molecular weight of 160,000 to 250,000, and thiuram disulfide to two portions of 1,000 grams of No. 90 asphalt at a temperature of 160°C. After shearing and stirring by the mixer for 50 minutes, the obtained material was allowed to stand and react for 120 minutes at 180° C. to obtain the finished modified asphalt product. The main performance indicators are shown in the data in the table below.

[0021] Comparative example 2

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PUM

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Abstract

The invention relates to a modified asphalt for roads and a preparation method thereof. Its constituent materials mainly include polymer wax, polymer elastomer (SBS), vulcanizing agent and basic asphalt. The polymer modified road asphalt product of the present invention has a high softening point, good construction performance and use performance, not only meets the technical requirements of ordinary road modified asphalt, but also can meet the requirements of high softening point materials in specific road construction .

Description

1. Technical field [0001] The invention relates to modified asphalt and a preparation method thereof, in particular to a modified asphalt for roads with a high softening point and a preparation method thereof. 2. Background technology [0002] Styrene-butadiene-styrene block copolymer (SBS) modified asphalt, as a bonding material for road construction, is mainly used in high-grade road construction. Compared with ordinary road asphalt, its sensitivity to temperature has been significantly improved, mainly in the softening point index has been significantly improved. In the technical specification for high-grade road petroleum asphalt, the softening point is specified as a maximum of 55°C, while in the specification for modified asphalt, the softening point can be higher than 60°C. The pavement can maintain a high viscosity under the ambient temperature of the pavement, and it is not easy to flow, which effectively maintains the stability of the structure of the pavement sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
Inventor 宁爱民徐青柏吴佩尊陈杰李志军
Owner CHINA PETROLEUM & CHEM CORP