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Asphalt modified masterbatch and method for preparation

An asphalt modification and master batch technology, which is applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of rising processing costs, unfavorable modified asphalt, inability to use colloid mills and high-speed shearing equipment wear, etc. The effect of improving processability and improving performance

Active Publication Date: 2006-10-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Described filler is talcum powder, white carbon black, calcium carbonate, and these components can bring adverse effect to the subsequent processing of asphalt and the performance of asphalt, as the existence of filler will cause can not be used in the follow-up modified asphalt production Colloid mill and high-speed shearing machine (greater wear and tear on equipment), which will restrict the further dispersion of modifiers in asphalt, which is not conducive to the production of finished modified asphalt with stable thermal storage
[0006] The masterbatch involved in the preparation method of SBS modified asphalt disclosed in USP4,567,222 is to dissolve polymer and polysulfide with crude oil atmospheric and vacuum distillate and then mix with asphalt. Parts are removed, which will lead to an increase in processing costs and pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of asphalt modified masterbatch provided by the present invention comprises: first adding 65-95% by weight, preferably 70-90% by weight of polymer modifier, 1-30% by weight of asphalt, and 1-30% by weight of compatibilizer , 0.01-3% by weight of additives are uniformly mixed, and then the melt temperature of the mixture is controlled between 60-200°C, preferably 100-185°C, extruded and granulated on a twin-screw extruder.

[0019] The polymer modifier described in the preparation method of asphalt modified masterbatch is styrene / conjugated diene polymer and / or polyolefin polymer, in other words, the polymer modifier can be styrene / conjugated diene Polyolefin polymers, polyolefin polymers, or mixtures of styrene / conjugated diene polymers and polyolefin polymers. Among them, styrene / conjugated diene polymers refer to conjugated diene diblock polymers and triblock thermoplastic elastomers containing different proportions of styrene, such as SBS, SIS,...

Embodiment 1

[0028] Take by weighing 1800 grams of SBS, 100 grams of straight-run asphalt (its properties are shown in Table 1), 100 grams of compatibilizer solvent refining extract oil, 1.2 grams of auxiliary agent pentachlorothiophenol zinc salt, and add the above materials to the mixing pot Mix well, and then add it to the hopper of a twin-screw extruder (model SHJ-38, produced by Lanzhou Lantai Plastic Machinery Co., Ltd., the same below) with a barrel temperature of 175°C (melt temperature, the same below). , start the extruder, and cut the extrusion masterbatch into pellets with a thickness not greater than 2mm through a pelletizer, which is the asphalt modified masterbatch A prepared by the present invention. m .

[0029] Weigh 567 grams of blended asphalt and 33 grams of asphalt modified masterbatch A m , Pour the blended asphalt into the mixing tank first, and then add the asphalt modified masterbatch A when the asphalt is heated to 175°C m Add, turn on the agitator, and dischar...

Embodiment 2

[0034] Take by weighing 1600 grams of SBS, 200 grams of straight-run asphalt (its properties are shown in Table 1), 200 grams of compatibilizer solvent refining extract oil, 1.0 grams of auxiliary agent pentachlorothiophenol zinc salt, and add the above materials to the mixing pot Mix well, then add it into the hopper of the twin-screw extruder with a barrel temperature of 175°C, start the extruder, and cut the extruded masterbatch into pellets with a thickness of no more than 2mm through a pelletizer. The material is the asphalt modified masterbatch B prepared by the present invention m .

[0035] Weigh 564 grams of blended asphalt and 36 grams of asphalt modified masterbatch B m , first pour the asphalt into the stirring tank, when the asphalt is heated to 175°C, then add the asphalt modified masterbatch B m Add, turn on the agitator, and discharge after stirring for 45 minutes, the obtained sample is the modified asphalt product B. Asphalt modified masterbatch B m The c...

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PUM

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Abstract

An asphalt modified masterbatch comprises 65-95 wt% polymer modifier, 1-30 wt% asphalt, 1-30 wt% compatibilizer, 0.01-3 wt% additive; first mix 65-95 wt% Polymer modifier, 1-30 wt% asphalt, 1-30 wt% compatibilizer, 0.01-3 wt% additives are evenly mixed, then the melt temperature of the mixture is controlled between 60-200°C, and the twin-screw Extrude and granulate on an extruder to obtain asphalt modified masterbatch; heat 85-98% by weight of asphalt to 100-220°C, add 2-15% by weight of the above-mentioned asphalt-modified masterbatch and stir for 20-60 minutes to obtain modified asphalt. The asphalt modified masterbatch provided by the invention can effectively improve the dispersibility of the polymer modifier in the asphalt, can maximize the modification effect of the polymer modifier, and significantly improve the performance of the modified asphalt.

Description

technical field [0001] The invention relates to an asphalt material composition and a preparation method thereof, more specifically, an asphalt modified masterbatch and a preparation method thereof. Background technique [0002] As a pavement material for roads, construction and water conservancy industries, asphalt has developed very rapidly. However, asphalt is highly sensitive to temperature. There are problems of high temperature flow in summer and low temperature cracking in winter. Therefore, it has brought certain restrictions to its application. [0003] In view of this, adding polymer modifiers to asphalt to improve the temperature sensitivity of asphalt has attracted more and more attention. The addition of different types of polymer modifiers can improve the high temperature resistance of asphalt, improve the low temperature resistance of asphalt or improve the high and low temperature performance of asphalt at the same time, so as to reduce the temperature sensit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/10C08L95/00
Inventor 佘玉成王子军龙军王翠红鲍跃文
Owner CHINA PETROLEUM & CHEM CORP