Secondarily-curable polyurethane modified epoxy asphalt mixture, preparation method therefor and application thereof

A technology of polyurethane modified and epoxy asphalt, which is applied to thermosetting high-performance polyurethane modified epoxy asphalt mixture, the preparation of the above mixture, and the application field of the above mixture, which can solve the complex compatibilizer preparation method and heat resistance. Poor performance, poor fatigue resistance and other problems, to achieve the effect of high temperature and low temperature secondary curing, reduce the restrictions of construction conditions, improve strength and toughness

Active Publication Date: 2015-11-04
中路交建(北京)工程材料技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN1952012A discloses a thermosetting epoxy asphalt material, which uses a special compatibilizer to improve the compatibility of epoxy resin and asphalt. The stability of medium-modified asphalt is difficult to control, and the use process is complicated
[0007] Due to the high cross-linking density of the cured product of epoxy resin, it has a three-dimensional network structure, resulting in large internal stress, high brittleness, poor fatigue resistance, poor heat resistance, and low impact strength. In the application of steel bridge decks, The epoxy asphalt pavement layer has a large number of cracks and damages, which causes large-scale delamination and other diseases, which greatly reduces the service life of the pavement layer and affects driving safety.

Method used

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  • Secondarily-curable polyurethane modified epoxy asphalt mixture, preparation method therefor and application thereof

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preparation example Construction

[0061] The preparation method of tung oil modified amine curing agent is as follows: mix tung oil, phenols and acidic catalyst, heat up to 50-110°C, react for 0.5-3h, then cool down to 30-60°C, add amines, stir and heat up to 70- At 90°C, after mixing evenly, add aldehydes dropwise, react for 2-5 hours and then dehydrate to obtain tung oil modified amine.

[0062] The long-chain curing agent is synthesized from tung oil and maleic anhydride.

[0063] The preparation method of the long-chain curing agent is as follows: mix tung oil and maleic anhydride, pass nitrogen into the container for protection, raise the temperature to 180-210°C, and react for 1-5 hours to obtain the long-chain curing agent.

[0064] Accelerators for component B are tertiary amines or imidazoles. The tertiary amine accelerator is one or more of benzyldimethylamine, N,N-dimethylaniline, diethylaminopropylamine, 2,4,6-tris(dimethylaminomethyl)phenol kind. The imidazole accelerator is one or more of imid...

Embodiment 1

[0077] (1) Vacuum dehydrate 5 parts of polyoxypropylene diol at 120°C for 1 hour, add 4 parts of diphenylmethane diisocyanate, stir and raise the temperature to 80°C for 2 hours to obtain a polyurethane prepolymer.

[0078] (2) Add 100 parts of epoxy resin to the polyurethane prepolymer, continue to stir and react at 80° C. for 2 hours, and perform vacuum defoaming treatment to obtain component A polyurethane modified epoxy resin.

[0079] (3) Add 60 parts of polyamide 650 curing agent with heat preservation at 60 degrees to the reaction kettle, add 60 parts of long-chain curing agent, 0.005g of N,N-dimethylaniline accelerator, mix and stir for 20 minutes, and complete the preparation of component B. preparation;

[0080] (4) Mix 100 parts of component A polyether type polyurethane modified epoxy resin with component B, and stir at room temperature for 5 minutes;

[0081] (5) Mix components A and B with 110 parts of 70# petroleum asphalt kept at 120°C for 10 minutes to obtain...

Embodiment 2

[0084] (1) Vacuum dehydrate 6 parts of polyoxypropylene triol at 110° C. for 1.5 h, add 6 parts of hexamethylene diisocyanate, stir and heat up to 85° C. for 2 h to obtain a polyurethane prepolymer.

[0085] (2) Add 100 parts of epoxy resin to the polyurethane prepolymer, continue to stir and react at 80° C. for 3 hours, and perform vacuum defoaming treatment to obtain component A polyurethane modified epoxy resin.

[0086] (3) Add 50 parts of polyamide 650 curing agent at a temperature of 60 degrees to the reaction kettle, add 75 parts of long-chain curing agent, 0.00625 g of benzyldimethylamine accelerator, mix and stir for 20 minutes, and complete the preparation of component B;

[0087] (4) Mix 100 parts of component A polyether type polyurethane modified epoxy resin with component B, and stir at room temperature for 5 minutes;

[0088] (5) Mix the material mixed in step 4, 112.5 parts of 70# petroleum asphalt with heat preservation at 110°C into the stone, and stir at 100...

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Abstract

The present invention provides a secondarily-curable polyurethane modified epoxy asphalt mixture which is prepared by mixing 2-8 parts by mass of polyurethane modified epoxy asphalt with 92-98 parts by mass of mineral aggregates; the polyurethane modified epoxy asphalt consists of a component A, a component B, and a component C, wherein the component A is 100 parts of polyurethane modified epoxy resin; the component B consists of the following substances in parts by mass: 70-150 parts of a curing agent and 0-0.02 parts of an accelerator; and the component C is 50-200 parts of asphalt. The secondarily-curable polyurethane modified epoxy asphalt mixture provided by the present invention is suitable for paving a steel bridge deck and a cement concrete bridge deck and paving and repairing an asphalt pavement, and is used for special road sections such as an intersection and a bus stop.

Description

technical field [0001] The invention relates to a modified asphalt for roads, specifically a three-component thermosetting high-performance polyurethane modified epoxy asphalt mixture capable of secondary curing. [0002] The present invention also relates to a preparation method of the above-mentioned mixture. [0003] The present invention also relates to the application of the above-mentioned mixture. Background technique [0004] In recent years, epoxy asphalt material, as a new type of thermosetting high-performance material, has been widely used in bridge and road pavement and repair in my country. In order to give full play to its performance, the epoxy resin must be uniformly and fully distributed in the asphalt, but the epoxy resin is a polar substance, while the asphalt is a non-polar or weak polar substance, so the epoxy resin and asphalt compatibility is crucial. [0005] Chinese patent CN101255276A discloses an epoxy asphalt material for road bridges and its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C08G18/58C08G18/48
Inventor 曹东伟张艳君靳明洋张海燕
Owner 中路交建(北京)工程材料技术有限公司
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