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Special spray polyurea elastic coating for protecting hydraulic structure and preparation method and application method thereof

An elastic coating and hydraulic construction technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as insufficient hardness and toughness, long construction period, and human hazards, and achieve excellent comprehensive performance, good anti-leakage effect, fast curing effect

Active Publication Date: 2012-10-03
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing solutions, such as traditional epoxy mortar, inorganic mortar and other materials, have the following disadvantages: ①The hardness is insufficient and the toughness is insufficient, and it is easy to wear and fall under the cavitation and impact during flood discharge, and the service life is very short. , it needs to be fully repaired almost every time before the renewal comes, resulting in an increase in repair and maintenance costs; ②It is difficult to construct on the vertical surface or the top surface; ③The system contains organic solvents, which is harmful to the human body and pollutes the environment; ④Multi-channel construction must be used, Long construction period and low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 30 parts by weight of polyether diol with an equivalent of 1000 into a nitrogen-filled reactor, heat to (105-115)°C, vacuumize at a constant temperature until the pressure in the kettle is above -0.095MPa and dehydrate for 3 hours, then turn off the vacuum and cool down to Add 25 parts by weight of MDI-MI at (50-60) °C, heat to (70-90) °C and react for 3 hours, cool down to (50-60) °C, add 10 parts by weight of Lupranate M20S, 35 parts by weight of Modur 1453, stir evenly The material is A component. Component B is made by stirring and mixing 7 parts by weight of T-5000, 33 parts by weight of D-2000, 22 parts by weight of DETDA, 18 parts by weight of DMTDA, 15 parts by weight of talcum powder and 5 parts by weight of calcium carbonate in a reactor.

[0045] When in use, components A and B are sprayed by the H-XP3 host and Fusion MP spray gun of Graco Company of the United States at a ratio of 1:1 (volume ratio) to form polyurea elastomers. It is suitable for the sp...

Embodiment 2

[0050] Add 25 parts by weight of polyether triol with an equivalent of 1000 into a nitrogen-filled reactor, heat to (105-115)°C, vacuumize at a constant temperature until the pressure in the kettle is above -0.095MPa and dehydrate for 3 hours, then turn off the vacuum and cool down to Add 40 parts by weight of MDI-100 at (50-60)°C, heat to react at (70-90)°C for 3 hours, cool down to (50-60)°C, add 5 parts by weight of Suprasec 5005, 30 parts by weight of Suprasec 9009, and stir evenly, that is For the A component. Component B is prepared by stirring and mixing 40 parts by weight of T-5000, 20 parts by weight of D-2000, 20 parts by weight of DETDA, 10 parts by weight of talcum powder and 10 parts by weight of calcium carbonate in a reactor.

[0051] When in use, components A and B are sprayed by the H-XP3 host and Fusion MP spray gun of Graco Company of the United States at a ratio of 1:1 (volume ratio) to form polyurea elastomers. By adjusting the angle of the spray gun, the...

Embodiment 3

[0056] Add 50 parts by weight of polyether diol with an equivalent of 1000 into a nitrogen-filled reactor, heat to (105-115)°C, vacuumize at a constant temperature until the pressure in the kettle is above -0.095MPa and dehydrate for 3 hours, then turn off the vacuum and cool down to Add 30 parts by weight of MDI-100 at (50-60) °C, heat to (70-90) °C and react for 3 hours, cool down to (50-60) °C, add 5 parts by weight of Suprasec 5005, 15 parts by weight of Modur 1453, stir well, That is the A component. Component B is prepared by stirring and mixing 23 parts by weight of T-5000, 37 parts by weight of D-2000, 18 parts by weight of DETDA, 12 parts by weight of DMTDA and 10 parts by weight of calcium carbonate in a reactor.

[0057] When in use, components A and B are sprayed by the H-XP3 host and Fusion MP spray gun of Graco Company of the United States at a ratio of 1:1 (volume ratio) to form polyurea elastomers. By adjusting the angle of the spray gun, the system can obtain...

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Abstract

The invention discloses special spray polyurea elastic coating for protecting a hydraulic structure. The special spray polyurea elastic coating is two-component elastic coating subjected to field spray moulding and composed of a component A and a component B, wherein the component A consists of semi-prepolymer and 0-10 parts of diluent, wherein the semi-prepolymer is obtained by the reaction between 30-60 parts of polyisocyanate and 30-50 parts of polyether polyol all by weight; and the component B consists of 35-65 parts of amino-terminated polyether, 25-40 parts of liquid amine chain extender, 0-20 parts of pigment and 0-8 parts of assistant all by weight. In the special spray polyurea elastic coating for protecting a hydraulic structure, disclosed by the invention, the two components are quickly mixed and sprayed to the substrate surface by the spraying equipment, and quickly react to solidify into an elastic and tough coating. The coating has the functions of high anti-permeability, high strength, high elongation, water prevention, corrosion prevention, abrasion resistance, solvent resistance and the like.

Description

technical field [0001] The invention relates to a spray polyurea elastic paint specially used for hydraulic building protection, belonging to the field of building materials. Background technique [0002] In the face of emergencies such as flood disasters, it is very important to ensure the safe and reliable operation of hydraulic structures. Hydraulic discharge structures are an important part of water conservancy projects. Ensuring their normal operation, flood discharge and energy dissipation are crucial to the safety of the entire project. Critical. [0003] Erosion wear and cavitation damage are the most common engineering problems in the operation of hydraulic discharge structures (such as spillway, spillway, spillway, overflow dam, and scupper hole), especially with the increasing scale of hydraulic projects, The flow velocity of drainage structures generally exceeds 35m / s, and some have ultra-high flow velocity of 50-60m / s, and the problems of erosion and cavitation...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/12C08G18/66C08G18/50C08G18/48
Inventor 刘子康李红英
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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