Organic enhanced alkali lignin/SBS (styrene-butadiene-styrene) composite modifier as well as preparation method and application thereof

A composite modifier and alkali lignin technology, applied in the field of asphalt processing, can solve the problems of depletion of industrial synthetic modifier raw materials, pollution treatment and other problems

Pending Publication Date: 2022-05-20
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopting the method in the present invention can not only solve the problems of asphalt ultraviolet aging and thermal oxygen aging, but also reduce the cost of asphalt anti-aging additives, and simultaneously solve the problems of depletion of raw materials for industrial synthesis modifiers and pollution treatment in the dark night of papermaking, and finally realize the sustainable development

Method used

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  • Organic enhanced alkali lignin/SBS (styrene-butadiene-styrene) composite modifier as well as preparation method and application thereof
  • Organic enhanced alkali lignin/SBS (styrene-butadiene-styrene) composite modifier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides an organically enhanced soda lignin / SBS composite modifier, in terms of mass fraction, consisting of the following raw materials: 24% organically enhanced solix, 62.6% SBS, 0.4% tetrasulfide bis (1,5-pentyl) Tyrrum, 13% catalytic oil slurry; the preparation method of the organically enhanced sognin comprises the following steps:

[0032] S1, the 4,4'-diphenylmethane diisocyanate, cyclohexylamine and tetrahydrofuran were mixed according to the mass ratio of 5:2:43, stirred at 50 °C for 1h to give solution A; the alkali lignin and tetrahydrofuran were mixed according to the mass ratio 10:90, and the reaction was stirred at 60 °C for 1h to give solution B;

[0033] S2, under the protection of nitrogen, the solution A and the solution B are mixed according to the mass ratio 1:3, stirred at 60 ° C for 5h; after the reaction is over, decompression is filtered, the filter cake is washed with deionized water 3 times and then washed 3 times with tol...

Embodiment 2

[0042] The organically enhanced solyda / SBS composite modifier provided in the present embodiment, in terms of mass fraction, consists of the following raw materials: 20% organically enhanced solix, 67.7% SBS, 0.3% tetramethylcholamm disulfide, 12% catalytic oil slurry;

[0043] The preparation method of the organically enhanced alkali lignin comprises the following steps:

[0044] S1, the 2,4'-diphenylmethane diisocyanate, cyclohexylamine and tetrahydrofuran according to the mass ratio of 10: 5: 85 mixed, stirred at 45 ° C for 2h, to give solution A; the alkali lignin and tetrahydrofuran were mixed according to the mass ratio of 20:80, stirred at 55 ° C for 2h, to give solution B;

[0045]S2, under the protection of nitrogen, the solution A and the solution B are mixed according to the mass ratio 1:4, stirred at 55 ° C for 6h; after the end of the reaction, decompression filtration, filter cake washed with deionized water 5 times and then washed with toluene 5 times, and then fi...

Embodiment 3

[0052] The organically enhanced solydain / SBS composite modifier provided in the present embodiment, in terms of mass fraction, consists of the following raw materials: 30% organically enhanced soled lignin, 54.5% SBS, 0.5% tetraethyl thirulam disulfide, 15% catalytic oil slurry;

[0053] The preparation method of the organically enhanced alkali lignin comprises the following steps:

[0054] S1, the 2,2'-diphenylmethane diisocyanate, cyclohexylamine and tetrahydrofuran were mixed according to the mass ratio of 10:6:84, stirred at 48 °C for 1.5h to give solution A; the alkali lignin was mixed with the tetrahydrofuran according to the mass ratio of 15:85, stirred at 57 °C for 1.5h, to give solution B;

[0055]S2, under the protection of nitrogen, the solution A and the solution B are mixed according to the mass ratio of 3:7, stirred at 58 ° C for 4h; after the reaction is over, decompression is filtered, the filter cake is washed with deionized water 4 times and then washed with to...

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Abstract

The invention provides an organic enhanced alkali lignin/SBS (styrene-butadiene-styrene) composite modifier as well as a preparation method and application thereof, and belongs to the technical field of asphalt processing. The organic enhanced alkali lignin/SBS composite modifier is prepared from the following raw materials in percentage by mass: 20%-35% of organic enhanced alkali lignin, 47.2%-67.7% of SBS, 0.3%-0.8% of an accelerant and 12%-17% of a compatilizer, the organic enhanced alkali lignin is obtained by taking diphenylmethane diisocyanate, cyclohexylamine and alkali lignin as raw materials to react in tetrahydrofuran. The organic enhanced alkali lignin/SBS composite modifier is used for preparing the anti-aging SBS asphalt, and the anti-aging SBS asphalt is prepared from the following raw materials in percentage by mass: 81.90%-91.98% of asphalt, 8.00%-18.00% of the organic enhanced alkali lignin/SBS composite modifier and 0.05%-0.10% of a stabilizer. The anti-aging SBS asphalt has excellent thermo-oxidative aging resistance and ultraviolet aging resistance.

Description

Technical field [0001] The present invention belongs to the field of asphalt processing technology, specifically relates to an organically enhanced alkali lignin / SBS composite modifier and its preparation method and application in asphalt processing. Background [0002] Styrene-butadiene-styrene triblock copolymer (SBS) modified asphalt pavement has become the most widely used modified asphalt in the world due to its excellent road properties such as high temperature rutting resistance and low temperature crack resistance. However, in the long-term use of SBS modified asphalt pavement due to the natural factors of heat, moisture, ultraviolet rays, oxygen and the action of vehicle load, many complex physical and chemical changes will occur, resulting in the aging degradation of SBS modified asphalt and the deterioration of asphalt performance eventually lead to road surface ruts, flaking, cracks and pits and other pavement diseases, which seriously affect the durability of aspha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L97/00C08L95/00C08H7/00
CPCC08L53/02C08L95/00C08H6/00C08L2201/08C08L97/005Y02W30/91
Inventor 何边阳朱磊李艳芳夏甜万世恒程壮陈俊峰李维双杨梦丽汪连生
Owner HUBEI ENG UNIV
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