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A kind of two-component liquid joint glue for normal temperature pavement and preparation method thereof

A two-component, joint-filling technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of slow curing rate, long time of closed traffic, high price, etc., and achieve no VOC Volatilization, shortening construction time, and saving materials

Active Publication Date: 2021-11-16
河北德瑞公路工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, ordinary petroleum asphalt is difficult to meet the requirements of road surface filling in terms of high temperature stability, resistance to hard object embedding, and low temperature performance; and modified asphalt, which is usually used as a cement, is insufficient due to its resistance to hard object embedding and low temperature performance. It is generally considered to be suitable for middle and low-grade roads with low winter temperature, small crack expansion and displacement, and small traffic volume; while emulsified asphalt has poor bonding performance, low initial strength, and slow open traffic, so it is more used. It is suitable for filling joints with no or small displacement cracks; the special joint filling adhesive for pavement has the properties of strong adhesion to the joint wall, no flow at high temperature, no brittle cracking at low temperature, and the price is moderate. However, due to the heating required for construction, the road surface needs to be grooved , strong smell, unfriendly to the environment, poor aging resistance and wear resistance, some areas have begun to restrict the use
The normal temperature type sealant has excellent comprehensive performance, but the curing rate is slow, the sealing traffic time is long, and basically all of them are imported products from abroad, which are expensive

Method used

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  • A kind of two-component liquid joint glue for normal temperature pavement and preparation method thereof
  • A kind of two-component liquid joint glue for normal temperature pavement and preparation method thereof
  • A kind of two-component liquid joint glue for normal temperature pavement and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0040] A method for preparing two-component liquid joint glue for normal temperature roads, comprising the following steps:

[0041] a. Preparation of component A:

[0042] ①. Weigh polyether polyol, chlorinated paraffin and dioctyl phthalate according to the ratio and add them to the reaction kettle, start stirring and heat up to 120°C, keep stirring and keep warm at 120°C, close the reaction kettle, and turn on the vacuum pump Vacuum to -0.02MPa for 3 hours;

[0043] ②. Stop vacuuming, stir and cool down to 85°C, add diphenylmethane diisocyanate (MDI), and react for 3 hours;

[0044] ③. After the reaction is completed, turn on the vacuum pump and continue to evacuate to -0.02MPa, keep it for 1 hour, release the closed system of the reactor and discharge; obtain A component;

[0045] b. Preparation of component B:

[0046] ④. Add polyether polyol, chlorinated paraffin, moca, coupling agent and light calcium powder into the reaction kettle, stir and heat to 120°C; then contin...

Embodiment 1

[0051] Embodiment 1 proportioning

[0052]

[0053] Preparation:

[0054] a. Preparation of component A:

[0055] ①. Weigh polyether polyol DL-2000D 80Kg, polyether polyol 330N 20Kg, chlorinated paraffin (42#) 20Kg, and dioctyl phthalate 12.5Kg according to the proportion, add them to the reaction kettle, and start stirring Heat and keep the temperature at 120°C, close the reaction kettle, turn on the vacuum pump to evacuate to -0.02MPa for 3 hours;

[0056] ②. After vacuuming is completed, turn on the water circulation to stir and cool down and keep it at 85°C, add 15Kg of diphenylmethane diisocyanate (MDI) through negative pressure, and react for 3 hours;

[0057] ③. After the reaction is completed, continue to evacuate to -0.02MPa, keep it for 1 hour, cool down to 60°C, release the closed system of the reactor and discharge; obtain A component;

[0058] b. Preparation of component B:

[0059] ④. Add polyether polyol 2020 30Kg, polyether polyol 330N70Kg, chlorinated p...

Embodiment 2

[0064] Proportion:

[0065]

[0066] Preparation:

[0067] a. Preparation of component A:

[0068] ①.Weigh 70Kg of polyether polyol DL-2000D, 30Kg of polyether polyol 330N, 15Kg of chlorinated paraffin (42#), and 9Kg of dioctyl phthalate according to the proportion, add them to the reaction kettle, stir and heat Raise the temperature to 120°C, close the reaction kettle, turn on the vacuum pump to evacuate to -0.02MPa for 3 hours, put the barreled diphenylmethane diisocyanate (MDI) into a 70°C water bath to keep warm for later use.

[0069] ②. Vacuuming is completed, turn on the water circulation and cool down to 85°C, add 27Kg of diphenylmethane diisocyanate (MDI) through negative pressure, and close the reactor for 3 hours;

[0070] ③. After the reaction is completed, continue to evacuate to -0.02MPa, keep it for 1 hour, cool down to 60°C, release the closed system of the reactor and discharge; obtain A component;

[0071] b. Preparation of component B:

[0072] ④. Add...

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Abstract

The two-component liquid joint glue for normal temperature prepared by the present invention is polyurethane two-component A and B type liquid joint glue, wherein the A component is composed of diphenylmethane diisocyanate (MDI), polyether polyol, chlorine Prepolymer obtained by chemical synthesis of various materials such as paraffin wax and dioctyl phthalate; component B is asphalt, polyether polyol, chlorinated paraffin, polyisobutylene, crosslinking agent, coupling agent, catalyst , Drying agent, light calcium powder and other materials. When using, fully mix A and B components according to a certain proportion, and pour directly into the cracks of the road surface to obtain a road surface pouring with high cohesive force, high adhesion, high wear resistance, high weather resistance and fast curing. Seam, seam material. It can be used for various types of cracks in asphalt and cement pavement.

Description

technical field [0001] The invention belongs to the technical field of highway engineering, and in particular relates to a two-component liquid joint glue for normal-temperature pavement and a preparation method thereof. Background technique [0002] Cracks are one of the most common and most prone early diseases of pavement. Although the initial cracks basically have no effect on the service performance, the cracks destroy the integrity and continuity of the pavement structure and lead to a weakening of the structural strength to a certain extent. Make the base layer soft, and under the action of traffic load, it will lead to increased damage to the road surface, forming cracks and even slurry, which will greatly reduce the service life of the road. Therefore, early prevention and treatment of pavement cracks must be strengthened. [0003] At present, the joint filling materials used in pavement crack repair mainly include hot asphalt, emulsified asphalt, normal temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J191/06C09J195/00C09J11/04C09J11/06C08G18/48
CPCC08G18/48C08K2003/265C08L2205/035C09J11/04C09J11/06C09J175/08C08L91/06C08L95/00C08L23/22C08K3/26C08K5/12
Inventor 王洪刚何志刚朱佳凯
Owner 河北德瑞公路工程有限公司
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