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A kind of preparation method of polyurea waterproof coating applied to concrete surface

A concrete surface and waterproof coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor leveling effect, poor water resistance, and poor adhesion of concrete substrates on the coating film surface, so as to improve the binding force, The effect of water resistance improvement

Inactive Publication Date: 2019-10-01
上海途灏实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, polyurea waterproof coating needs to be applied by professional spraying equipment and its outdoor weather resistance is poor, so its application is limited in many occasions; in addition, its curing speed is too fast, and there is not enough time to infiltrate the surface of the substrate, which is easy to cause coating Poor adhesion of the coating to the concrete substrate, poor leveling effect on the surface of the coating film, poor water resistance when used outdoors, etc.

Method used

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  • A kind of preparation method of polyurea waterproof coating applied to concrete surface
  • A kind of preparation method of polyurea waterproof coating applied to concrete surface
  • A kind of preparation method of polyurea waterproof coating applied to concrete surface

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Embodiment 1

[0027] The first step, preparation of modifying agent: by weight, dissolve 22 parts of components shown in formula (I) in 60 parts of ethyl acetate, then add 0.5 parts of strong oxidizing agent H 5 IO 6 , carry out the oxidation reaction under the condition of avoiding light, the reaction temperature is 20°C, and the reaction time is 0.3h. After the reaction is completed, the solvent is distilled off under reduced pressure to obtain the aldehyde modified modifier;

[0028] (I);

[0029] Step 2, by weight, 45 parts of TDI (toluene-2,4-diisocyanate), 20 parts of polyether E-210, 12 parts of DMPA (2,2-dihydroxypropionic acid), 8 parts of alkoxy silicone oil Mix evenly, add 0.5 part of dibutyltin dilaurate to carry out the first reaction, then add 2 parts of the first chain extender neopentyl glycol to carry out the second reaction, the reaction temperature for the first and second time is 70 ℃, the first reaction time is 2h, the second reaction time is 1h, and then add 5 part...

Embodiment 2

[0034] The first step, the preparation of modifier: by weight, dissolve 45 parts of components shown in formula (I) in 95 parts of ethyl acetate, then add 1 part of strong oxidizing agent H 5 IO 6 , carry out the oxidation reaction under the condition of avoiding light, the reaction temperature is 30°C, and the reaction time is 1h. After the reaction is completed, the solvent is distilled off under reduced pressure to obtain the formylated modifier;

[0035] (I);

[0036] Step 2, by weight, 50 parts of TDI (toluene-2,4-diisocyanate), 25 parts of polyether E-210, 20 parts of DMPA (2,2-dihydroxypropionic acid), 12 parts of alkoxy silicone oil Mix evenly, add 1 part of dibutyltin dilaurate to carry out the first reaction, then add 8 parts of the first chain extender neopentyl glycol to carry out the second reaction, the reaction temperature for the first and second time is 90 ℃, the first reaction time is 4h, the second reaction time is 3h, then add 12 parts of ethyl acetate ...

Embodiment 3

[0041] The first step, the preparation of modifier: by weight, 35 parts of components shown in formula (I) are dissolved in 75 parts of ethyl acetate, then add 0.8 parts of strong oxidizing agent H 5 IO 6 , carry out the oxidation reaction under the condition of avoiding light, the reaction temperature is 25°C, and the reaction time is 0.7h. After the reaction is completed, the solvent is distilled off under reduced pressure to obtain the aldehyde modified modifier;

[0042] (I);

[0043] Step 2, by weight, 47 parts of TDI (toluene-2,4-diisocyanate), 22 parts of polyether E-210, 18 parts of DMPA (2,2-dihydroxypropionic acid), 10 parts of alkoxy silicone oil Mix evenly, add 0.8 part of dibutyltin dilaurate to carry out the first reaction, then add 5 parts of the first chain extender neopentyl glycol to carry out the second reaction, the reaction temperature of the first and second time is 75 ℃, the first reaction time is 3h, the second reaction time is 2h, then add 10 parts...

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Abstract

The invention relates to a preparation method of polyurea waterproof paint applied to a concrete surface, and belongs to the technical field of polyurea paint. Polyurea anti-corrosion paint applied toa petroleum pipeline provided by the invention has the advantages of good water-resistant performance and high combination force with concrete. The polyurea paint provided by the invention solves theproblem of low adhesion force of conventional paint on the concrete surface. Modifying agents are added into polyurea prepolymers, so that molecule structures of the prepolymer are changed; the combination force with concrete is improved; meanwhile, modified polyurethane is introduced, so that the water-resistant performance of the paint on the concrete surface is improved.

Description

technical field [0001] The invention relates to a preparation method of a polyurea waterproof coating applied to concrete surfaces, and belongs to the technical field of polyurea coatings. Background technique [0002] Polyurea waterproof coating (full name is spray polyurea elastomer coating) is a new type of solvent-free and pollution-free waterproof coating developed to meet the needs of environmental protection. [0003] Polyurea is usually also two-component reaction molding, but due to the extremely fast reaction speed, it can be cured within a few seconds, which cannot be realized by manual operation, so polyurea is generally formed by special mechanical spraying. The main features of spraying polyurea waterproof coating are as follows: (1) Fast curing and high construction efficiency. The curing speed of polyurea after spraying is extremely fast. Generally, the gel will not stick to hands within a few seconds, and it will reach walking strength after a few hours. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/63C09D7/65C08G18/10C08G18/32C08G18/34C08G18/48C08G18/61C08G18/66C08G18/50
Inventor 张军志
Owner 上海途灏实业有限公司
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