Grafted gutta percha asphalt modifier
A technology of asphalt modifier and eucommia gum, which is applied in building components, building insulation materials, construction, etc., can solve the problems of cost and output impact, non-renewable, and difficulty in importing high-quality crude oil and asphalt, so as to break dependence and improve asphalt performance effect
Inactive Publication Date: 2011-06-15
李志刚 +2
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Problems solved by technology
[0002] At present, asphalt modifiers mainly use petrochemical by-products, such as SBS, SBR, etc. These materials are non-renewable and highly dependent on high-quality crude oil. Imported crude oil is mainly used for refining, and its cost and output will be affected by crude oil.
In addition, once the situation at home and abroad changes, it will be very difficult to import high-quality crude oil and asphalt, which will definitely have a great impact on road construction and maintenance
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[0023] 1. Add Eucommia gum to the internal mixer, plasticize at 150°C for 1 hour, and the speed is 50rad / min.
[0024] (2) Eucommia gum grafting
[0025] Add the plasticized eucommia gum into xylene, heat to 120 degrees and stir to dissolve. After the dissolution is complete, cool down to the reaction temperature, add maleic anhydride according to the formula, stir and dissolve, and pass nitrogen gas for 5 minutes. The initiator was dissolved in xylene and slowly added dropwise into the solution. Control the temperature and react for 60 minutes. The product was precipitated with absolute ethanol, and unreacted maleic anhydride was washed with absolute ethanol three times for two hours each time. The washed samples were filtered and then dried at room temperature.
[0026] Grafted eucommia gum can be blended with asphalt alone or compounded with SBS, SBR, PE and other modifiers to modify asphalt.
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The invention discloses a grafted gutta percha asphalt modifier which relates to modification of asphalt serving as a building material in the technical field of transportation. The conventional asphalt modifier is mainly selected from byproducts of the petrochemical industry, such as SBS (Styrene Butadiene Styrene), SBR (Styrene Butadiene Rubber) and the like. The materials are nonrenewable and have high dependence on high-quality crude oil. The invention provides natural renewable high polymer gutta percha for asphalt modification, which is used for lowering the dependence of the conventional asphalt modifier on petroleum serving as a nonrenewable resource. The gutta percha is trans-form-polyisoprene which is easy for ordered agglomeration and crystallization and cannot be directly applied to asphalt modification. In the grafted gutta percha asphalt modifier, small molecules are grafted on the long chain of a gutta percha molecule to partially damage the crystallization of the gutta percha. Although the elasticity of the gutta percha is not as high as that of gutta percha treated by vulcanization, a part of plasticity is kept and the gutta percha becomes a rubber-plastic dual thermoplastic elastic material. High and low temperature performance of asphalt can be improved, and technical requirements of national and ministerial standards are met.
Description
technical field [0001] The invention relates to the modification of asphalt, a building material in the technical field of traffic, and aims at improving the performance of the asphalt. Background technique [0002] At present, asphalt modifiers mainly use petrochemical by-products, such as SBS, SBR, etc. These materials are non-renewable and highly dependent on high-quality crude oil. Imported crude oil is mainly used for refining, and its cost and output will be affected by crude oil. In addition, once the situation at home and abroad changes, it will be very difficult to import high-quality crude oil and asphalt, which will definitely have a great impact on road construction and maintenance. [0003] Eucommia ulmoides is a unique forestry resource in my country. It mainly grows in the central and western regions. It is easy to plant, grows quickly, and has strong climate adaptability. Eucommia gum exists in the leaves, bark, and roots of the Eucommia tree, and is a wild ...
Claims
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IPC IPC(8): C08F289/00C08L51/00C08L95/00
Inventor 李志刚李烨李清泉
Owner 李志刚
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