Method of manufacturing thermoplastic olefine polymer modified asphalt having good stability

A thermoplastic olefin technology with good stability, which is applied in building construction, coking ovens with vertical carbonization chambers, building components, etc. It can solve the problems of low stability of modified asphalt, special requirements for equipment, complex manufacturing process, etc. question

Inactive Publication Date: 2003-07-16
重庆美仑道路沥青工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the shortcomings of the thermoplastic olefin polymer modified asphalt prepared in the prior art, such as low stability, complex manufacturing process and special requirements for equipment, the inventors, after extensive and in-depth research, invented a manufacturing heat storage stable The method of using SBS or SBR modified asphalt with good performance, the prepared modified asphalt is evaluated according to the above detection method, and no phase separation occurs during thermal storage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0047] Component Weight Fraction

[0048] SK90 asphalt 100.00

[0049] SBSYH791 4.30

[0050] Composite stabilizer 2.00

[0051] Preparation method:

[0052] Add SBSYH791 when the asphalt is 170°C, stop circulating after 1.5 hours of colloid mill circulation, then add composite stabilizer, and stir for 40 minutes.

[0053] The composition of the composite stabilizer is calculated by weight fraction, wherein the liquid aromatic regulator pine tar 80, sulfur 5, zinc oxide 20, zinc diethyldithiocarbamate 10, N-cyclohexyl-2-benzothiazole sulfenamide 5. p-phenylenediamine5.

[0054] The prepared sample meets the SBS modified asphalt I-D index required by the JTJ36-98 specification. Its softening point is 85°C; at 25°C, the penetration is 56dmm; the elastic recovery is 85%; the segregated softening point difference is 1.0°C.

[0055] As a comparison, the softening point of the modified asphalt without compound stabilizer i...

Embodiment 3

[0056] Component Weight Fraction

[0057] Xingneng No. 90 asphalt 100.00

[0058] Three line oil 2.00

[0059] SBS1301 4.40

[0060] Composite stabilizer 2.00 Preparation method:

[0061] Add SBS1301 when the asphalt is 170°C, stir and swell for 30 minutes, and circulate in the colloid mill for 1.5 hours. No more circulation, heat up to 180°C, then add composite stabilizer and stir for 30 minutes.

[0062] The composition of the composite stabilizer is calculated by weight fraction, including pine tar 60, liquid coumarone resin 60, sulfur 8, N-cyclohexyl-2-benzothiazole sulfenamide 8, zinc oxide 5, p-phenylenediamine 5 .

[0063] The prepared sample conforms to JTJ36-98, the index of SBS modified asphalt I-D, its softening point is 80°C; the penetration at 25°C is 56dmm; the elastic recovery rate is 85%; the segregated softening point difference is less than 1.5°C.

[0064] As a com...

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Abstract

A process for preparing high-stability modified asphalt features that the asphalt is modified by thermoplastic olefine polymer (SBS) or unsulfurized rubber (SBR) while a composite stabilizer is added, which is prepared from arylhydrocarbon concentration regulator, zinc oxide, S,N-substituted 2-benzothiazole sulfenamide, zinc dithioaminoformate, and p-phenyldiamine.

Description

technical field [0001] The invention belongs to a method for manufacturing modified asphalt, in particular to a method for manufacturing modified asphalt with good stability. Background technique [0002] In view of the importance of the stability of polymer-modified asphalt to construction and long-term performance, it has always been valued by the road and construction industries. This stability has two meanings: one is that the modified bitumen does not bleed oil during use, and the other is that it does not separate during thermal storage. [0003] These two stability evaluation methods are directly related to the compatibility between the asphalt phase and the polymer phase in the polymer modified asphalt system, so the research on compatibility plays an important role in the technical progress of modified asphalt. is great. The modified asphalt with good compatibility has not only good stability, but also other indicators have been greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C10B3/02
Inventor 孔宪明杨步然张玉贞
Owner 重庆美仑道路沥青工程有限公司
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