Steel structure roof waterproof coating and preparation method thereof

Abstract

The invention discloses a steel structure roof waterproof coating and a preparation method thereof, and belongs to the technical field of waterproof coating preparation, the steel structure roof waterproof coating comprises the following components by weight: 10-40 parts of an epoxy resin monomer or a prepolymer thereof; 10-40 parts of an acrylate monomer or a prepolymer thereof; 5 to 15 parts of an epoxy acrylate monomer; 1-8 parts of ethylene glycol glycidyl ether; 1 to 8 parts of hydroxyl acrylate; 2 to 12 parts of sodium hydrogen sulfite terminated diisocyanate; 2 to 10 parts of an amino functionalized metal organic framework UiO-66-NH2; 1 to 8 parts of benzotriazole; 0.1 to 0.5 part of an initiator; 5-30 parts of a filler; 0-3 parts of an auxiliary agent; 50 parts of deionized water; the waterproof coating with the epoxy resin, the polyacrylate and the polyurethane polymer chain as an interpenetrating network is prepared through the composite components, and the coating has the good affinity adhesion performance of the epoxy resin to metal, the weather resistance and aging resistance of the polyacrylate and the toughness of the polyurethane.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof coating preparation, and in particular to a steel structure roof waterproof coating and a preparation method thereof. Background Art

[0002] Metal / steel roofs are widely used in industrial buildings, public buildings, transportation buildings and other fields because of their light weight, high strength, easy installation and good aesthetics. Steel structure roofs have the following characteristics: Environmental protection, energy saving and pollution-free: Steel structure roof panels are environmentally friendly and energy-saving, and will not pollute the environment; Lightweight and high-strength: Steel structure roof materials have the characteristics of light weight and high strength, can bear a lot of weight and provide excellent structural support; Good earthquake resistance: Steel structure has good earthquake resistance and can maintain structural stability in natural disasters such as earthquakes; Quick construction: The installation and construction speed of steel structure roofs is fast , which can greatly shorten the construction period; at the same time, steel structure roofs are also prone to leakage. On the one hand, leakage is very likely to occur in the overlap of corrugated sheets, roof lighting strips, and the connection between eaves gutter steel plates and cement walls. On the other hand, as time goes by, metal roofs will be eroded by the natural environment, especially in areas with high humidity, frequent acid rain or high salt content. Metal roofs are prone to oxidation reactions and rust and corrosion, which not only affects the appearance of the roof, but also weakens its structural integrity, causing seepage and leakage problems; in order to ensure the long-term performance and safety of steel structure roofs, waterproofing is an indispensable part.

[0003] In actual applications, the waterproofing of steel structure roofs faces more severe environmental tests, especially when exposed outdoors. Exposed waterproofing projects must be able to withstand extreme weather conditions, including strong solar radiation, acid rain, temperature changes, wind loads, and thermal expansion and contraction and vibration of the steel structure itself. These external environmental problems place extremely high demands on the aging resistance, corrosion resistance, and impermeability of waterproof materials.

[0004] Applying waterproof coating on steel structure roof is a simple and effective waterproof protection method, but the existing steel structure waterproof coating has poor waterproof performance and is prone to leakage, which makes the waterproofing fail. The main reasons are that the coating has poor aging resistance, is not resistant to high temperature, is not heat-insulating, not rust-proof, has a short service life or is not firmly bonded. Summary of the invention

[0005] In view of the above problems, the present invention provides a steel structure roof waterproof coating and a preparation method thereof.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A steel structure roof waterproof coating, comprising the following components by weight:

[0008] 10-40 parts of epoxy resin monomer or its prepolymer;

[0009] 10-40 parts of acrylate monomer or prepolymer;

[0010] Epoxy acrylate monomer 5-15 parts;

[0011] 1-8 parts of ethylene glycol glycidyl ether;

[0012] 1-8 parts of hydroxy acrylate;

[0013] 2-12 parts of sodium bisulfite blocked diisocyanate;

[0014] Amino-functionalized metal organic framework UiO-66-NH2 2-10 parts;

[0015] 1-8 parts of benzotriazole;

[0016] Initiator 0.1-0.5 parts;

[0017] 5-30 parts of filler;

[0018] Additives 0-3 parts;

[0019] 50 parts of deionized water.

[0020] In some preferred embodiments, the epoxy resin monomer is one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolac epoxy resin, glycerol epoxy resin, tetraphenol ethane tetraglycidyl ether, resorcinol glycidyl ether, pyrogallol glycidyl ether, bisresorcinol acetal tetraglycidyl ether, amine amino tetrafunctional epoxy resin, para-aminophenol epoxy resin, T epoxy resin, and tetrahydrophthalate epoxy resin.

[0021] In some preferred embodiments, the acrylic acid ester monomer is one or more of methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate and lauryl methacrylate.

[0022] In some preferred embodiments, the molecular weight of the prepolymer of the acrylate monomer is 200-4000.

[0023] In some preferred embodiments, the prepolymer of the epoxy resin monomer has a viscosity of 300 to 600 cps at 25°C.

[0024] In some preferred embodiments, the initiator is an organic peroxide, and the organic peroxide is one or more of diisopropylbenzene peroxide, cumene hydroperoxide, di-tert-butyl peroxide, tert-butyl peroxybenzoate and tert-butyl hydroperoxide.

[0025] In some preferred embodiments, the filler is hydrophobically modified silica.

[0026] In some preferred embodiments, the method for preparing the hydrophobically modified silica comprises the following steps:

[0027] Perfluoroalkylethyltrialkoxysilane, tetraethyl silicate and ammonia solution are added to an alcohol solvent, and an alcohol solvent dispersion of nano-silicon dioxide is added, and the mixture is stirred for reaction at room temperature for 1-6 hours. After the reaction is completed, the precipitate is separated, washed with an alcohol solvent, and dried to obtain the product.

[0028] In some preferred embodiments, the mass ratio of the perfluoroalkylethyltrialkoxysilane to the tetraethyl silicate, the ammonia water, and the nano-silicon dioxide is (5.8-7.2):(2.8-3.5):(18-23):100.

[0029] In some preferred embodiments, the auxiliary agent is one or more of an emulsifier, a thickener, a coupling agent, a defoaming agent, a rheological agent, a stabilizer, an antioxidant, an antifreeze agent, a dispersant, and a pH adjuster.

[0030] Another aspect of the present invention is to provide a method for preparing the steel structure roof waterproof coating, comprising the following steps:

[0031] S1. Weigh each raw material component according to the ratio and set aside;

[0032] S2. Dispersing the epoxy resin monomer or its prepolymer, the acrylate monomer or its prepolymer, the epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate in deionized water to obtain solution A; dispersing the amino-functionalized metal organic framework UiO-66-NH2, the filler, the benzotriazole, and the initiator in deionized water to obtain solution B; dispersing the sodium bisulfite-terminated diisocyanate in deionized water to obtain solution C, mixing the solution A, solution B, and solution C, adding the auxiliary agent, and mixing well to obtain the solution.

[0033] The beneficial effects of the present invention are:

[0034] The waterproof coating of the present invention is prepared by composite components to form a waterproof coating with epoxy resin, polyacrylate and polyurethane polymer chains as an interpenetrating network. The coating has good affinity and adhesion performance of epoxy resin to metal, weather resistance and aging resistance of polyacrylate and toughness of polyurethane, and is a multifunctional waterproof coating; wherein epoxy acrylate monomer, ethylene glycol glycidyl ether and hydroxy acrylate play the role of cross-linking monomers, improve the cross-linking degree of the coating, and improve its anti-leakage performance. Furthermore, the present invention uses amino-functionalized metal organic framework UiO-66-NH2 as a cross-linking curing agent for epoxy resin and isocyanate, which improves the mechanical properties of the coating on the one hand, and can also be used as a slow-release carrier of the corrosion inhibitor benzotriazole to improve the corrosion resistance of the coating. Furthermore, the present invention further improves the waterproof and rust-proof properties of the coating by subjecting the silica filler to an organic-inorganic composite hydrophobic treatment. DETAILED DESCRIPTION

[0035] The present invention is further described in conjunction with the following examples.

[0036] Example 1

[0037] A steel structure roof waterproof coating, comprising the following components by weight:

[0038] Epoxy resin monomer 29 parts;

[0039] Acrylate monomer 22 parts;

[0040] 8.9 parts of bisphenol A epoxy acrylate;

[0041] 4.6 parts of ethylene glycol glycidyl ether;

[0042] 5.5 parts of hydroxy acrylate;

[0043] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0044] 6.2 parts of amino-functionalized metal organic framework UiO-66-NH2;

[0045] 5 parts of benzotriazole;

[0046] 0.35 parts of diisopropylbenzene peroxide initiator;

[0047] 18 parts of nano-silicon dioxide filler;

[0048] Emulsifier AS-906 0.7 parts;

[0049] 50 parts of deionized water;

[0050] The epoxy resin monomer is a mixture of bisphenol A epoxy resin and pyrogallol glycidyl ether in a molar ratio of 3:1;

[0051] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0052] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0053] S1. Weigh each raw material component according to the ratio and set aside;

[0054] S2, the epoxy resin monomer, the acrylate monomer, the bisphenol A epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate are dispersed in deionized water to obtain solution A; the amino-functionalized metal organic framework UiO-66-NH2, the nano-silica filler, the benzotriazole and the diisopropylbenzene peroxide initiator are dispersed in deionized water to obtain solution B; the sodium bisulfite-terminated diisocyanate is dispersed in deionized water to obtain solution C, the solution A, solution B and solution C are mixed, the emulsifier AS-906 is added, and the mixture is mixed evenly to obtain the solution.

[0055] Example 2

[0056] A steel structure roof waterproof coating, comprising the following components by weight:

[0057] Acrylate monomer 22 parts;

[0058] 8.9 parts of bisphenol A epoxy acrylate;

[0059] 4.6 parts of ethylene glycol glycidyl ether;

[0060] 5.5 parts of hydroxy acrylate;

[0061] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0062] 6.2 parts of amino-functionalized metal organic framework UiO-66-NH2;

[0063] 5 parts of benzotriazole;

[0064] 0.35 parts of diisopropylbenzene peroxide initiator;

[0065] 18 parts of nano-silicon dioxide filler;

[0066] Emulsifier AS-906 0.7 parts;

[0067] 50 parts of deionized water;

[0068] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0069] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0070] S1. Weigh each raw material component according to the ratio and set aside;

[0071] S2, dispersing the acrylate monomer, the bisphenol A epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate in deionized water to obtain solution A; dispersing the amino-functionalized metal organic framework UiO-66-NH2, the nano-silica filler, the benzotriazole, and the diisopropylbenzene peroxide initiator in deionized water to obtain solution B; dispersing the sodium bisulfite-terminated diisocyanate in deionized water to obtain solution C, mixing the solution A, solution B, and solution C, adding the emulsifier AS-906, and mixing well to obtain the solution.

[0072] Example 3

[0073] A steel structure roof waterproof coating, comprising the following components by weight:

[0074] Epoxy resin monomer 29 parts;

[0075] 8.9 parts of bisphenol A epoxy acrylate;

[0076] 4.6 parts of ethylene glycol glycidyl ether;

[0077] 5.5 parts of hydroxy acrylate;

[0078] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0079] 6.2 parts of amino-functionalized metal organic framework UiO-66-NH2;

[0080] 5 parts of benzotriazole;

[0081] 0.35 parts of diisopropylbenzene peroxide initiator;

[0082] 18 parts of nano-silicon dioxide filler;

[0083] Emulsifier AS-906 0.7 parts;

[0084] 50 parts of deionized water;

[0085] The epoxy resin monomer is a mixture of bisphenol A epoxy resin and pyrogallol glycidyl ether in a molar ratio of 3:1;

[0086] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0087] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0088] S1. Weigh each raw material component according to the ratio and set aside;

[0089] S2, dispersing the epoxy resin monomer, the bisphenol A epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate in deionized water to obtain solution A; dispersing the amino-functionalized metal organic framework UiO-66-NH2, the nano-silica filler, the benzotriazole, and the diisopropylbenzene peroxide initiator in deionized water to obtain solution B; dispersing the sodium bisulfite-terminated diisocyanate in deionized water to obtain solution C, mixing the solution A, solution B, and solution C, adding the emulsifier AS-906, and mixing well to obtain the solution.

[0090] Example 4

[0091] A steel structure roof waterproof coating, comprising the following components by weight:

[0092] Epoxy resin monomer 29 parts;

[0093] Acrylate monomer 22 parts;

[0094] 8.9 parts of bisphenol A epoxy acrylate;

[0095] 4.6 parts of ethylene glycol glycidyl ether;

[0096] 5.5 parts of hydroxy acrylate;

[0097] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0098] 5 parts of benzotriazole;

[0099] 0.35 parts of diisopropylbenzene peroxide initiator;

[0100] 18 parts of nano-silicon dioxide filler;

[0101] Emulsifier AS-906 0.7 parts;

[0102] 50 parts of deionized water;

[0103] The epoxy resin monomer is a mixture of bisphenol A epoxy resin and pyrogallol glycidyl ether in a molar ratio of 3:1;

[0104] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0105] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0106] S1. Weigh each raw material component according to the ratio and set aside;

[0107] S2, the epoxy resin monomer, the acrylate monomer, the bisphenol A epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate are dispersed in deionized water to obtain solution A; the nano-silica filler, the benzotriazole and the diisopropylbenzene peroxide initiator are dispersed in deionized water to obtain solution B; the sodium bisulfite-terminated diisocyanate is dispersed in deionized water to obtain solution C, the solution A, solution B and solution C are mixed, the emulsifier AS-906 is added, and the mixture is mixed evenly to obtain the solution.

[0108] Example 5

[0109] A steel structure roof waterproof coating, comprising the following components by weight:

[0110] Epoxy resin monomer 29 parts;

[0111] Acrylate monomer 22 parts;

[0112] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0113] 6.2 parts of amino-functionalized metal organic framework UiO-66-NH2;

[0114] 5 parts of benzotriazole;

[0115] 0.35 parts of diisopropylbenzene peroxide initiator;

[0116] 18 parts of nano-silicon dioxide filler;

[0117] Emulsifier AS-906 0.7 parts;

[0118] 50 parts of deionized water;

[0119] The epoxy resin monomer is a mixture of bisphenol A epoxy resin and pyrogallol glycidyl ether in a molar ratio of 3:1;

[0120] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0121] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0122] S1. Weigh each raw material component according to the ratio and set aside;

[0123] S2, dispersing the epoxy resin monomer and the acrylate monomer in deionized water to obtain solution A; dispersing the amino-functionalized metal organic framework UiO-66-NH2, the nano-silica filler, the benzotriazole and the diisopropylbenzene peroxide initiator in deionized water to obtain solution B; dispersing the sodium bisulfite-terminated diisocyanate in deionized water to obtain solution C, mixing the solution A, solution B and solution C, adding the emulsifier AS-906, and mixing well to obtain the solution.

[0124] Example 6

[0125] A steel structure roof waterproof coating, comprising the following components by weight:

[0126] Epoxy resin monomer 29 parts;

[0127] Acrylate monomer 22 parts;

[0128] 8.9 parts of bisphenol A epoxy acrylate;

[0129] 4.6 parts of ethylene glycol glycidyl ether;

[0130] 5.5 parts of hydroxy acrylate;

[0131] 7.4 parts of sodium bisulfite blocked diisocyanate;

[0132] 6.2 parts of amino-functionalized metal organic framework UiO-66-NH2;

[0133] 5 parts of benzotriazole;

[0134] 0.35 parts of diisopropylbenzene peroxide initiator;

[0135] 18 parts of hydrophobically modified nano-silica filler;

[0136] Emulsifier AS-906 0.7 parts;

[0137] 50 parts of deionized water;

[0138] The epoxy resin monomer is a mixture of bisphenol A epoxy resin and pyrogallol glycidyl ether in a molar ratio of 3:1;

[0139] The acrylic acid ester monomers are methyl acrylate, methyl methacrylate and isooctyl acrylate in equal molar ratios;

[0140] The preparation method of the hydrophobically modified nano-silica filler comprises the following steps:

[0141] Perfluorohexylethyltrimethoxysilane, tetraethyl silicate and ammonia solution (20wt%) are added to an ethanol solvent, and an ethanol solvent dispersion of nano-silicon dioxide is added, and the mixture is stirred and reacted for 4 hours at room temperature. After the reaction is completed, the precipitate is separated, washed with an ethanol solvent, and dried to obtain a product; wherein the mass ratio of the perfluorohexylethyltrimethoxysilane to the tetraethyl silicate, the ammonia solution, and the nano-silicon dioxide is 6:3:20:100;

[0142] The preparation method of the steel structure roof waterproof coating comprises the following steps:

[0143] S1. Weigh each raw material component according to the ratio and set aside;

[0144] S2, the epoxy resin monomer, the acrylate monomer, the bisphenol A epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate are dispersed in deionized water to obtain solution A; the amino-functionalized metal organic framework UiO-66-NH2, the hydrophobically modified nano-silica filler, the benzotriazole and the diisopropylbenzene peroxide initiator are dispersed in deionized water to obtain solution B; the sodium bisulfite-terminated diisocyanate is dispersed in deionized water to obtain solution C, the solution A, solution B and solution C are mixed, the emulsifier AS-906 is added, and the mixture is mixed evenly to obtain the solution.

[0145] Experimental example

[0146] The product performance of the waterproof coating prepared in Examples 1-6 was tested, and the determination method was carried out with reference to the determination method described for ordinary products in the industry standard JG / T375-2012. The determination results are as follows:

[0147]

[0148]

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A steel structure roof waterproof coating, characterized in that: By weight, it includes the following components: 10-40 parts of epoxy resin monomer or its prepolymer; 10-40 parts of acrylate monomer or prepolymer; Epoxy acrylate monomer 5-15 parts; 1-8 parts of ethylene glycol glycidyl ether; 1-8 parts of hydroxy acrylate; 2-12 parts of sodium bisulfite blocked diisocyanate; Amino-functionalized metal organic framework UiO-66-NH2 2-10 parts; 1-8 parts of benzotriazole; Initiator 0.1-0.5 parts; 5-30 parts of filler; Additives 0-3 parts; 50 parts of deionized water.

2. A steel structure roof waterproof coating according to claim 1, characterized in that: The epoxy resin monomer is one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolac epoxy resin, glycerol epoxy resin, tetraphenol ethane tetraglycidyl ether, resorcinol glycidyl ether, pyrogallol glycidyl ether, bisresorcinol acetal tetraglycidyl ether, amine amino tetrafunctional epoxy resin, para-aminophenol epoxy resin, T epoxy resin, and tetrahydrophthalate epoxy resin.

3. A steel structure roof waterproof coating according to claim 1, characterized in that: The acrylic acid ester monomer is one or more of methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate and lauryl methacrylate.

4. A steel structure roof waterproof coating according to claim 1, characterized in that: The molecular weight of the prepolymer of the acrylic ester monomer is 200-4000; the viscosity of the prepolymer of the epoxy resin monomer at 25° C. is 300-600 cps.

5. The steel structure roof waterproof coating according to claim 1, characterized in that: The initiator is an organic peroxide, and the organic peroxide is one or more of diisopropylbenzene peroxide, cumene hydroperoxide, di-tert-butyl peroxide, tert-butyl peroxybenzoate and tert-butyl hydroperoxide.

6. A steel structure roof waterproof coating according to claim 1, characterized in that: The filler is hydrophobically modified silica.

7. A steel structure roof waterproof coating according to claim 6, characterized in that: The preparation method of the hydrophobically modified silica comprises the following steps: Perfluoroalkylethyltrialkoxysilane, tetraethyl silicate and ammonia solution are added to an alcohol solvent, and an alcohol solvent dispersion of nano-silicon dioxide is added, and the mixture is stirred for reaction at room temperature for 1-6 hours. After the reaction is completed, the precipitate is separated, washed with an alcohol solvent, and dried to obtain the product.

8. A steel structure roof waterproof coating according to claim 7, characterized in that: The mass ratio of the perfluoroalkylethyltrialkoxysilane to the tetraethyl silicate, the ammonia water and the nano-silicon dioxide is (5.8-7.2):(2.8-3.5):(18-23):

100.

9. The steel structure roof waterproof coating according to claim 1, characterized in that: The auxiliary agent is one or more of an emulsifier, a thickener, a coupling agent, a defoamer, a rheological agent, a stabilizer, an antioxidant, an antifreeze agent, a dispersant, and a pH regulator.

10. A method for preparing a waterproof coating for steel structure roof according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh each raw material component according to the ratio and set aside; S2. Dispersing the epoxy resin monomer or its prepolymer, the acrylate monomer or its prepolymer, the epoxy acrylate monomer, the ethylene glycol glycidyl ether, and the hydroxy acrylate in deionized water to obtain solution A; dispersing the amino-functionalized metal organic framework UiO-66-NH2, the filler, the benzotriazole, and the initiator in deionized water to obtain solution B; dispersing the sodium bisulfite-terminated diisocyanate in deionized water to obtain solution C, mixing the solution A, solution B, and solution C, adding the auxiliary agent, and mixing well to obtain the solution.

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