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High-viscosity asphalt modifier and its preparation method

A technology of high-viscosity asphalt and modifier, applied in building components, building insulation materials, construction, etc., can solve the problems of unreported, poor stability, poor dispersion, etc., achieve simple process, improve adhesion, and improve flow sexual effect

Active Publication Date: 2007-04-25
SHANGHAI PUDONG ROAD & BRIDGE CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no report on a solution that can solve both poor dispersion and poor stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1kg of SBS501 (30% styrene content, molecular weight 150000) was blended with different amounts of C5 petroleum resin on a twin-screw extruder at about 160°C, and pelletized to obtain modifier masterbatches, and measured The melt index was obtained, and the data are shown in Table 1.

[0013] It can be seen from Table 1 that with the increase of the amount of petroleum resin in SBS, the melt index of the modifier increases and the fluidity improves, which is beneficial to the dispersion of SBS in asphalt. When the dispersion performance of the modifier is good, the SBS can be dispersed in the asphalt only by ordinary stirring.

[0014] Table 1 Properties of SBS / petroleum resin modifier

[0015]

[0016] Take the above-mentioned No. 1-4 basic formula modifiers containing 36g of SBS, add them into 600g of 160°C hot asphalt respectively, stir and disperse for 30 minutes, and prepare modified asphalt with a weight content of SBS of 6%. According to the T0605-199...

Embodiment 2

[0021] Mix 1kg of polymer (SBS501, 30% styrene content, 150,000 molecular weight) with different amounts of petroleum resin and diatomaceous earth on a twin-screw extruder at about 150°C, and granulate into strands to obtain a modifier . The composition and melt index of the modifier are shown in Table 3.

[0022] From Table 3, the petroleum resin can be C5 resin, C9 resin or C5 and C9 copolymer resin. As the amount of diatomite in the modifier increases, the melt index and fluidity decrease, which is not conducive to the improvement of dispersibility, so the content of diatomite should not be too high.

[0023] Table 3 Properties of SBS / petroleum resin / diatomite modifier

[0024] Modifier

party number

SBS

petroleum resin

diatomaceous earth

dispersion

Melt index g / 10min

(190℃, 2.16kg)

5

100

100 (carbon five)

0

it is good

22.1

6

...

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PUM

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Abstract

A modifier for high-viscosity asphalt is proportionaly from styrene-butadiene-styrene (SBS) copolymer, petroleum resin and diatomite through mixing, extruding out and granulating. It can improve the flowability and high-temp storage stability of asphalt.

Description

technical field [0001] The invention relates to a composition of an asphalt modifier and a preparation method thereof. Background technique [0002] High-viscosity asphalt refers to asphalt with a viscosity greater than 20kPa.s at 60°C, which is suitable for paving heavy traffic roads and drainage roads. High-viscosity asphalt is currently mainly prepared by adding polymers to petroleum asphalt. Adding polymers to modify petroleum asphalt can significantly improve the high and low temperature performance of asphalt, and improve the high temperature anti-rutting and low temperature anti-cracking capabilities of asphalt pavement. However, due to the differences in molecular weight and viscosity between polymers and asphalt, it is difficult to disperse polymer-modified asphalt; at the same time, because most polymers are not completely compatible with asphalt, and there is a difference in density, resulting in the modified asphalt system. The storage stability at high tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08L57/02C08L95/00C08K3/34
Inventor 徐斌赫振华罗芳艳王仕峰张勇张隐西
Owner SHANGHAI PUDONG ROAD & BRIDGE CONSTR
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