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Grafting type asphalt modified masterbatch and method for preparation

A bitumen modification and grafting technology, applied in building insulation materials, building components, buildings, etc., can solve the problems of solvent recovery, high cost, pollution, etc., and achieve improved processing performance, improved compatibility, and improved storage stability Effect

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

However, this method has problems such as solvent recovery, high cost, and pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the grafted asphalt modified masterbatch provided by the present invention comprises: first, 65 to 95 weight % of polymer modifier, 0.5 to 30 weight % of asphalt, 0.5 to 30 weight % of compatibilizer, 4 to 12% by weight of the grafting reaction auxiliary agent is uniformly mixed, and then the melt temperature of the mixture is controlled between 80-200° C., preferably 100-180° C., extruded and granulated on a twin-screw extruder.

[0021] The polymer modifier described in the preparation method of grafted asphalt modified masterbatch is styrene / conjugated diene polymer and / or polyolefin polymer, in other words, the polymer modifier can be styrene / The conjugated diene polymer may also be a polyolefin polymer, and may also be a mixture of a styrene / conjugated diene polymer and a polyolefin polymer. Among them, styrene / conjugated diene polymers refer to conjugated diene diblock polymers and triblock thermoplastic elastomers containing different s...

Embodiment 1

[0030] Take by weighing 1600 grams of SBS, 200 grams of straight-run pitch (its properties are as shown in Table 1), 200 grams of compatibilizer solvent refining extract oil, 100 grams of graft reaction auxiliary maleic anhydride, add the above materials to the mixing Mix well in the pot, and then add it to a twin-screw extruder (model SHJ-38, produced by Lanzhou Lantai Plastic Machinery Co., Ltd. ) in the hopper, start the extruder, and cut the extruded masterbatch into pellets with a thickness not greater than 2mm through a pelletizer, which is the grafted asphalt modified masterbatch A prepared by the present invention m .

[0031] Weigh 564 grams of blended asphalt and 36 grams of grafted asphalt modified masterbatch A m , first pour the asphalt into the stirring tank, when the asphalt is heated to 175 ° C, then the grafted asphalt modified masterbatch A m Add, turn on the agitator, and discharge after stirring for 60 minutes, the obtained sample is the modified asphalt ...

Embodiment 2

[0040] Take by weighing 1600 grams of SBS, 200 grams of straight-run pitch (its properties are as shown in Table 1), 200 grams of compatibilizer solvent refining extract oil, 200 grams of graft reaction auxiliary maleic anhydride, add the above materials to the mixing Mix well in the pot, then add it into the hopper of the twin-screw extruder with the temperature of the barrel at 165°C and the temperature of the extrusion head at 150°C, start the extruder, and cut the extruded masterbatch into A pellet with a thickness not greater than 2mm, which is the grafted asphalt modified masterbatch B prepared in the present invention m .

[0041] Weigh 564 grams of blended asphalt and 36 grams of grafted asphalt modified masterbatch B m , first pour the asphalt into the stirring tank, when the asphalt is heated to 175 ° C, then the grafted asphalt modified masterbatch B m Add, turn on the agitator, and discharge after stirring for 60 minutes, the obtained sample is the modified aspha...

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Abstract

A grafted asphalt modified masterbatch includes 65-95% by weight of polymer modifier, 0.5-30% by weight of asphalt, 0.5-30% by weight of compatibilizer, and 4-12% by weight of graft reaction assistant; 65-95% by weight of polymer modifier, 0.5-30% by weight of asphalt, 0.5-30% by weight of compatibilizer, and 4-12% by weight of graft reaction auxiliary agent are uniformly mixed, and then the melt temperature of the mixture is controlled at 80 Between ~200°C, extrude and granulate on a twin-screw extruder to obtain grafted asphalt modified masterbatch; heat 85~98% by weight of asphalt to 100~220°C, add 2~15% by weight of the above The grafted asphalt modified masterbatch is stirred for 30-80 minutes to obtain the modified asphalt. The asphalt modified masterbatch provided by the invention can effectively improve the dispersibility of the polymer modifier in asphalt, can maximize the modification effect of the polymer modifier, significantly improve the performance of the modified asphalt, and improve the modified Storage stability of asphalt.

Description

technical field [0001] The invention relates to an asphalt material composition and a preparation method thereof, more specifically, a grafted 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] Therefore, 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 redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/10C08L23/08C08L95/00
Inventor 佘玉成王子军龙军罗爱兰韩冬张彪
Owner CHINA PETROLEUM & CHEM CORP
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