CN-121991594-A - High-pressure-resistant waterproof material composite coating and preparation method thereof

CN121991594ACN 121991594 ACN121991594 ACN 121991594ACN-121991594-A

Abstract

The application belongs to the technical field of materials, and particularly relates to a high-pressure-resistant waterproof material composite coating and a preparation method thereof, wherein the waterproof material composite coating comprises a first waterproof coating, a polyurea coating and a second waterproof coating which are arranged in a lamination manner; the first waterproof coating and the second waterproof coating are the same, the first waterproof coating and the second waterproof coating are rubber asphalt waterproof layers, and the composite coating also has waterproof performance under high pressure.

Inventors

WANG SHUAICHAO
LUO YINGYING
XING YUBO
LIU ZHENGJIE
SONG HONGHONG
CAO HAIFENG

Assignees

大禹伟业(北京)国际科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. The high-pressure-resistant waterproof material composite coating is characterized by comprising a first waterproof coating, a polyurea coating and a second waterproof coating which are arranged in a laminated manner; the first waterproof coating and the second waterproof coating are the same, and the first waterproof coating and the second waterproof coating are rubber asphalt waterproof layers.
2. The high pressure resistant waterproof material composite coating according to claim 1, wherein at least one of the following is satisfied: The raw materials of the first waterproof coating comprise 30-60 parts of modified emulsified asphalt, 30-60 parts of high polymer emulsion, 3-10 parts of tackifying resin, 5-30 parts of filler and 0.5-2.0 parts of defoamer; the polyurea coating is a single-component polyurea coating or a double-component polyurea coating.
3. The high pressure resistant waterproof material composite coating according to claim 2, wherein the raw materials of the single-component polyurea coating comprise 60-70 parts of NCO-terminated semi-prepolymer, 15-20 parts of closed amino-terminated chain extender, 8-12 parts of amino-terminated polyether, 2-3 parts of thixotropic agent, 0.5-1 part of ultraviolet absorber and 0.3-0.8 part of adhesion promoter.
4. The high-pressure resistant waterproof material composite coating according to claim 2, wherein the raw materials of the two-component polyurea coating comprise a component A and a component B; Wherein the component A comprises 40-50 parts of aromatic MDI, 30-35 parts of polytetrahydrofuran dihydric alcohol, 15-20 parts of polyether triol, 0.1-0.3 part of catalyst and 0.05-0.1 part of stabilizer; The component B comprises 50-60 parts of amino-terminated polypropylene oxide ether, 10-15 parts of ethylenediamine ethanesulfonate, 8-12 parts of 1, 4-butanediol diaminopropyl ether, 2-3 parts of first fumed silica, 0.5-1 part of dispersing agent, 0.5-2 parts of carbon black and 5-8 parts of talcum powder.
5. The high pressure resistant waterproof material composite coating according to claim 1, wherein at least one of the following is satisfied: the thickness of the first waterproof coating is 1.5-3.0mm; The thickness of the polyurea coating is 1.0-1.2mm; the thickness of the second waterproof coating is 1.5-3.0mm.
6. The high pressure resistant waterproof material composite coating according to claim 2, wherein at least one of the following is satisfied: the modified emulsified asphalt comprises SBS modified emulsified asphalt; the high polymer emulsion comprises at least one of acrylic emulsion, chloroprene rubber emulsion, natural rubber emulsion and styrene-butadiene rubber emulsion; the tackifying resin comprises at least one of coumarone resin, terpene resin, rosin resin and petroleum resin; the filler is a mixture of a silane coupling agent, nano silicon dioxide, a dispersing agent and water; The defoamer comprises an organosilicon defoamer.
7. The high pressure resistant waterproof material composite coating according to claim 6, wherein at least one of: The silane coupling agent comprises at least one of gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane and epoxy silane coupling agent; the dispersing agent comprises an aqueous polymer wetting dispersing agent; the particle size of the nano silicon dioxide is 10-50nm; the mass fraction of the silane coupling agent in the filler is 0.5-1%; The mass fraction of the dispersing agent in the filler is 5-8%; The mass fraction of the nano silicon dioxide in the filler is 20-50%; The silicone defoamer comprises a polydimethylsiloxane emulsion.
8. The high pressure resistant waterproof material composite coating according to claim 3, wherein at least one of: the terminal NCO semi-prepolymer comprises a TDI-polyether polyol type terminal NCO semi-prepolymer; The closed amino-terminated chain extender comprises caprolactam closed MDA; The amine-terminated polyether comprises polyoxypropylene diol diamine; The thixotropic agent comprises a second fumed silica; the ultraviolet absorber comprises 2, 4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol; The adhesion promoter comprises gamma-aminopropyl triethoxysilane.
9. The high pressure resistant waterproof material composite coating according to claim 4, wherein at least one of: The part ratio of the component A to the component B is 0.5:1-1:1.5; The aromatic MDI comprises 4,4' -diphenylmethane diisocyanate; the molecular weight of the polytetrahydrofuran dihydric alcohol is 2000; The polyether triol is glycerol-initiated polyoxypropylene triol, the functionality is 3, the molecular weight is 2800-3200, and the hydroxyl value is 54-58 mgKOH/g; the catalyst comprises dibutyl tin dilaurate; The stabilizer comprises benzoyl chloride; the dispersant comprises a high molecular weight block copolymer comprising pigment affinic groups.
10. The preparation method of the high-pressure-resistant waterproof material composite coating is characterized by comprising the following steps of: spraying first waterproof coating slurry on the base layer to form a first waterproof coating; coating polyurea slurry on the first waterproof coating to form a polyurea coating; and spraying second waterproof coating slurry on the polyurea coating to form a high-pressure-resistant waterproof material composite coating.

Description

High-pressure-resistant waterproof material composite coating and preparation method thereof Technical Field The application belongs to the technical field of materials, and particularly relates to a high-pressure-resistant waterproof material composite coating and a preparation method thereof. Background The spray-coating quick-setting waterproof material has wide application in the fields of building waterproofing, high-speed rail subways and the like. The current spray quick-setting waterproof material mainly comprises spray quick-setting rubber asphalt paint and polyurethane waterproof material, and can meet the waterproof requirement of a conventional building, but short plates exist in a high-pressure energy storage environment, wherein the tensile strength of the conventional waterproof material is only 0.5-1.0 MPa, the conventional waterproof material is far lower than the structural bearing requirement in a high-pressure environment, and is easy to crack and peel after long-term compression, in addition, the spray quick-setting waterproof material is a single coating, and is difficult to combine impermeability, water resistance and high-pressure tolerance, for example, the cross-linking density is insufficient after the quick-setting material is solidified, the pressure resistance is poor, and the high-strength material is easy to deform and crack, so that the problem of water seepage is caused. Disclosure of Invention The application aims to provide a high-pressure-resistant waterproof material composite coating and a preparation method thereof, which are used for solving the problem that the existing waterproof material is poor in anti-permeability and waterproof performance under a high-pressure condition. In order to solve the technical problems, the application provides a high-pressure-resistant waterproof material composite coating, which comprises a first waterproof coating, a polyurea coating and a second waterproof coating which are arranged in a lamination manner, wherein the first waterproof coating and the second waterproof coating are the same, and the first waterproof coating and the second waterproof coating are rubber asphalt waterproof layers. The application also provides a preparation method of the high-pressure-resistant waterproof material composite coating, which comprises the steps of spraying first waterproof coating slurry on a base layer to form a first waterproof coating, coating polyurea slurry on the first waterproof coating to form a polyurea coating, and spraying second waterproof coating slurry on the polyurea coating to form the high-pressure-resistant waterproof material composite coating. The application provides a high-pressure-resistant waterproof material composite coating, which comprises a first waterproof coating, a polyurea coating and a second waterproof coating which are arranged in a laminated manner, wherein the first waterproof coating is the same as the second waterproof coating, and the first waterproof coating and the second waterproof coating are rubber asphalt waterproof layers. The polyurea coating, the first waterproof coating and the second waterproof coating in the composite coating are all core waterproof layers, wherein the polyurea coating is a core bearing layer and mainly bears external pressure, so that the integrity of the composite coating under high pressure is guaranteed, the waterproof performance of the composite coating under high pressure is achieved, the high elasticity and the compactness are achieved, and the final sealing bearing of a base layer is finally realized. The first waterproof coating and the second waterproof coating serve as cooperative waterproof layers, so that micropores and microcracks on the surface of the substrate can be closed, tiny construction flaws (such as local pinholes and lap joints) of the polyurea coating can be sealed, and meanwhile, the waterproof coating has excellent waterproof performance. Therefore, even if a single coating is slightly damaged in the composite coating, other waterproof layers can still cooperate with water blocking permeation, so that the problem that the whole layer is damaged at one position of the single coating is completely solved. Meanwhile, the polyurea coating has the core advantages of high elasticity and high wear resistance, the first waterproof coating can pertinently strengthen the sealing effect and interfacial adhesion force on the base material, the second waterproof coating can pertinently strengthen the weather resistance and ageing resistance, surface sealing, stain resistance and chemical medium resistance of the composite coating, and the composite coating after the three are combined simultaneously has the full-dimensional properties of water resistance, strong adhesion, high elasticity, heavy corrosion resistance, weather resistance and good sealing, and is suitable for severe requirements of different use environments. Additional aspects and advantage