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Synthesis of end amino phenylethylene/butadiene copolyer by tndcapping process and its method for preparing storage-stable modifie asphalt

A technology of amino-terminated styrene and modified asphalt, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve problems such as no application reports, improve storage stability, improve compatibility, The effect of simple preparation process

Inactive Publication Date: 2006-05-24
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared functionalized SBS has no application report in modified asphalt

Method used

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  • Synthesis of end amino phenylethylene/butadiene copolyer by tndcapping process and its method for preparing storage-stable modifie asphalt
  • Synthesis of end amino phenylethylene/butadiene copolyer by tndcapping process and its method for preparing storage-stable modifie asphalt
  • Synthesis of end amino phenylethylene/butadiene copolyer by tndcapping process and its method for preparing storage-stable modifie asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Use 2.2kg of cyclohexane with N 2 Press into the polymerizer, add a metered amount of styrene and preheat to 50°C, set THF / Li to 1.0, after adding THF, quickly add n-butyl lithium initiator to initiate the reaction for 30 minutes; according to the quality of the first stage styrene, Use a 1000ml croissant bottle to take a certain amount of pure liquid butadiene, use N 2 Press into the reaction kettle from the bottom of the kettle and react for 45 minutes; use N at the same temperature 2 The broken third stage of styrene was pressed into it, and the reaction was continued for 30 minutes, terminated with ethanol, and 1% antioxidant 264 was added. Then the solvent is removed, dehydrated and pressed into tablets to obtain SBS. GPC test shows that the molecular weight of the obtained SBS is 8.1×10 4 g / mol, the molecular weight distribution is 1.03.

Embodiment 2

[0058] Same as Example 1, the difference is that after the third stage of the styrene reaction is completed, the reaction temperature is reduced to 20°C, 1,5-diazabicyclo[3.1.0]hexane is added, and the reaction is conducted for 20 minutes. Stop with ethanol, add 1% antioxidant 264, remove solvent and water and press into tablets to obtain SBS-N. The test SBS end functionalization efficiency is 97%. The molecular weight of the tested SBS-N is 8.1×10 4 , The molecular weight distribution is 1.06. The mechanical properties are shown in Table 1.

[0059] Shore hardness

Embodiment 3

[0061] Weigh 250g of asphalt and heat it to 160°C in a mixing container, add 16g of SBS sample, stir for 20min at a shear rate of 3700r / min, then add 3 parts of sulfur and heat to 180°C. Stirring is continued for 40 minutes at a shear rate of 3700r / min to make the SBS and asphalt mix evenly.

[0062] The conventional performance of SBS modified asphalt was tested according to the national standard, and the results are shown in Table 2.

[0063] SBS type

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Abstract

The invention relates to an end capping method composing end amidogen cinnamene / butadiene copolymer and its preparation stockpile stable modified asphalt method. It belongs to polymer modified asphalt technique field. It uses butyl lithium as the anionic polymerization initiator, and 1, 5-dinirogen bicyclo caproylhydride as the anionic polymerization terminator. It makes omega-amidogen cinnamene / butadiene / cinnamene ternary block polymer. It adopts that end function SBS and the asphalt are mixed. This can effectively deduce the emanation degree of the SBS modified asphalt and obviously improve storage stability. It applies in modified asphalt manufacture field.

Description

Technical field [0001] The invention belongs to the technical field of polymer modified asphalt. The invention relates to a preparation method of a type of terminal functionalized styrene / butadiene block polymer and its use for preparing storage-stable modified asphalt. Background technique [0002] Thermoplastic elastomer styrene / butadiene / styrene block copolymer (SBS) is a block copolymer synthesized from two monomers, styrene and butadiene, which has both plastic melt processability and rubber elasticity. An important application area of ​​SBS is the use of modified asphalt as auxiliary equipment for highway pavement. Facts have proved that the comprehensive performance of SBS modified asphalt is the best among polymer modified asphalt. It can significantly improve the low-temperature plasticity, high-temperature stability, aging resistance, adhesion, elasticity, and stability of the mixture, and improve the asphalt The wear resistance and service life of the product. The main...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F8/32C08K5/17C08L3/02C08L95/00
Inventor 廖明义王玉荣王强倪阳
Owner CHINA PETROLEUM & CHEM CORP
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