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A kind of polyurethane single-component road liquid joint glue and preparation method thereof

A technology of polyurethane single and seam-filling glue, applied in the direction of polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problems of brittleness, long curing time, and inconvenient use, and achieve excellent Elongation ratio and tensile strength, avoid the expansion of cracks, the effect of simple and convenient use

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

But the construction needs to be heated, and asphalt heating produces exhaust gas, which pollutes the environment; the road surface needs to be grooved during construction, which is not convenient to use, which affects the construction efficiency; and the solid joint glue is exposed to the air for a long time after use, plus ultraviolet radiation. Its aging speed is very fast, so it becomes hard and brittle, and its poor aging resistance and wear resistance affect its sealing quality. Some areas have begun to restrict its use; the second largest category is normal temperature liquid joint glue, including modified emulsification Bitumen and solvent-based rubber bitumen
These two types of adhesives are greatly affected by the climate, and there are generally problems such as weak bonding, long curing time, and inability to quickly open traffic

Method used

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  • A kind of polyurethane single-component road liquid joint glue and preparation method thereof
  • A kind of polyurethane single-component road liquid joint glue and preparation method thereof
  • A kind of polyurethane single-component road liquid joint glue and preparation method thereof

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preparation example Construction

[0056] The preparation method of the polyurethane one-component road liquid joint glue, comprises the following steps:

[0057] g. Weigh polyether polyol, chlorinated paraffin, asphalt, and dioctyl phthalate according to the formula and add them to the reaction kettle, start stirring, and start heating;

[0058]h. When the temperature reaches 100-120°C, close the reaction kettle, turn on the vacuum pump to start vacuuming, start timing when the vacuum gauge reads 1200mmHg column, control the temperature at about 120°C, and keep it under negative pressure for 3 hours; stop heating at the same time, and Turn off the vacuum pump;

[0059] i. When the temperature drops to 80°C, turn on the vacuum pump, add diphenylmethane diisocyanate through negative pressure extraction, turn off the vacuum pump, control the temperature at 75-80°C, and keep the temperature for 2 hours;

[0060] d. Open the closed system of the reactor, turn off the heating system, add T-12 and curing agent LCA-3...

Embodiment 1

[0071]

[0072] Weigh 100Kg of polyether polyol, 15Kg of chlorinated paraffin, 15Kg of asphalt, and 30Kg of dioctyl phthalate into the reaction kettle, start stirring, and start heating; when the temperature reaches 100°C, close the reaction kettle, turn on the vacuum pump and start pumping. Vacuum, start timing when the reading of the vacuum gauge is 1200mmHg column, control the temperature at about 120°C, keep the negative pressure for 3 hours, stop heating at the same time, and turn off the vacuum pump; when the temperature drops to 80°C, turn on the vacuum pump, and add two Phenylmethane diisocyanate 17Kg, turn off the vacuum pump, the temperature should be controlled at 80°C, keep the temperature and stir for 2 hours; open the closed system of the reactor, turn off the heating system, when the temperature drops to 50°C, add 0.5Kg of T-12 catalyst, curing agent LCA -3000 7.5Kg, keep warm and stir for 30 minutes; stop heating and add 30Kg of light calcium powder, stir for...

Embodiment 2

[0074]

[0075] Weigh 80Kg of polyether polyol, 10Kg of chlorinated paraffin, 15Kg of asphalt, and 20Kg of dioctyl phthalate into the reaction kettle, start stirring, and start heating; when the temperature reaches 100°C, close the reaction kettle, turn on the vacuum pump and start pumping. Vacuum, start timing when the reading of the vacuum gauge is 1200mmHg column, control the temperature at about 120°C, keep the negative pressure for 3 hours, stop heating at the same time, and turn off the vacuum pump; when the temperature drops to 80°C, turn on the vacuum pump, and add two Phenylmethane diisocyanate 12Kg, turn off the vacuum pump, the temperature should be controlled at 80°C, keep the temperature and stir for 2 hours; open the closed system of the reactor, turn off the heating system, when the temperature drops to 50°C, add 0.2Kg of T-12 catalyst, curing agent LCA -3000 6Kg, keep warm and stir for 30 minutes; stop heating and add 20Kg of light calcium powder, stir for 30...

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Abstract

The invention belongs to the technical field of highway engineering, and specifically relates to a polyurethane single-component road liquid joint glue and a preparation method thereof. The polyurethane single-component road liquid joint glue proposed by the invention includes diphenylmethane diisocyanate, poly Ether polyol, chlorinated paraffin, dioctyl phthalate, asphalt, catalyst, curing agent and other materials are prepared by reaction. Traditional solid joint glue needs to be heated before use, and heating will inevitably produce harmful gases to pollute the environment. , the most important traditional solid joint glue has the problems of environmental protection, aging resistance and poor wear resistance, and its aging cycle is about one year. If it exceeds this cycle, it will inevitably produce multiple repairs, and it will appear easy to flow at high temperature and easy to flow at low temperature. Brittle problem. The polyurethane one-component liquid joint glue of the present invention can solve all the above-mentioned problems and can completely replace the solid joint glue. It not only has strong adhesion but also has excellent physical properties, which cannot be replaced by other joint glue.

Description

technical field [0001] The invention belongs to the technical field of highway engineering, and in particular relates to a polyurethane single-component liquid joint glue for roads and a preparation method thereof. Background technique [0002] Pavement cracks are one of the common diseases on the road surface, and they are more serious among many road diseases. If it is not treated in time, under the action of the vehicle load and the erosion of rainwater, the subgrade will be damaged, and the pavement will be quickly destroyed, causing large-scale cracks and even mud pumping, which will increase the maintenance and repair costs in the later period. Therefore, it is necessary to strengthen the prevention and control of early cracks on the pavement. [0003] At present, the treatment of pavement cracks is mainly to fill the joints with joint glue. From the perspective of the types of joint glue, it is mainly divided into two categories: the first category is thermal asphalt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J191/06C09J195/00C09J11/06C09J11/04C08G18/48
CPCC08G18/48C08K2003/265C08L2205/03C09J11/04C09J11/06C09J175/08C08L91/06C08L95/00C08K5/12C08K3/26
Inventor 朱佳凯王洪刚何志刚
Owner 河北德瑞公路工程有限公司
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