CN113004779A - Polyurea coating for seepage prevention of storage power station warehouse basin and preparation method thereof - Google Patents
Polyurea coating for seepage prevention of storage power station warehouse basin and preparation method thereof Download PDFInfo
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- CN113004779A CN113004779A CN202110223244.6A CN202110223244A CN113004779A CN 113004779 A CN113004779 A CN 113004779A CN 202110223244 A CN202110223244 A CN 202110223244A CN 113004779 A CN113004779 A CN 113004779A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
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- C08K2201/006—Additives being defined by their surface area
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The application provides a polyurea coating for preventing seepage of a storage power station warehouse basin, which belongs to the technical field of polyurea coatings and comprises a component A and a component B, wherein the component A is prepared by pre-polymerizing polyol, polyisocyanate and modified nano zinc oxide, the component B is prepared by mixing amino-terminated polyether, polyol, a coupling agent, a chain extender, a catalyst, a water removing agent and color paste, and the modified nano zinc oxide is prepared by modifying nano zinc oxide through boric acid o-methyl cyclohexanol diethanol amine ester. The invention also provides a preparation method of the polyurea coating for preventing seepage of the storage power station reservoir basin. According to the polyurea coating, the boric acid o-methylcyclohexanol diethanol amine ester enables the nano zinc oxide to be uniformly distributed on the polyurea body, so that the problems of agglomeration and uniform dispersion of the nano zinc oxide are solved, the performance of the nano zinc oxide is fully exerted, and the ageing resistance and the seepage resistance of the polyurea are improved while the excellent physical performance of the polyurea is maintained.
Description
Technical Field
The invention relates to the technical field of polyurea coatings, in particular to a polyurea coating for preventing seepage of a storage power station warehouse basin and a preparation method thereof.
Background
The upper reservoir of the pumped storage power station is at a high position, usually, no water source is supplied or the supply is not much, the leakage loss of water amount means the loss of electric quantity, and the leakage also influences the safety of the foundation and the bank slope of the surrounding building, so the anti-seepage requirement of the reservoir basin of the upper reservoir of the pumped storage power station is higher. The upper reservoirs of most pumped storage power stations always have some reservoir basin leakage problems, and certain engineering measures need to be taken, so that various seepage-proofing schemes are formed. Common anti-seepage schemes for sinks include reinforced concrete panels, asphalt concrete panels, clay, geomembranes, and the like.
Polyurea coating (polyurea coatings) adopts a one-time coating process, no connecting seam exists in any area, and the polyurea coating is also an environmental-friendly coating without voc and has the characteristics of strong adhesive force, friction resistance, good toughness and the like; the polyurea coating has the characteristics of better corrosion resistance, water resistance and wear resistance, and is widely applied in many fields in recent years. The patent with the application number of CN201920009740.X and the invention name of the warehouse basin seepage-proofing structure suitable for the upper warehouse of the pumped storage power station discloses a warehouse basin seepage-proofing structure suitable for the upper warehouse of the pumped storage power station, which comprises a warehouse basin slope surface formed by excavation; the warehouse basin slope surface is composed of a reinforced concrete panel or/and a concrete spraying panel, and an interface agent layer and a two-component polyurea coating are sequentially coated on the surface of the reinforced concrete panel or/and the concrete spraying panel. However, the formula of the polyurea coating suitable for the seepage prevention of the storage power station basin and the preparation method thereof are not disclosed or reported.
Therefore, a polyurea coating for preventing seepage of the storage power station warehouse basin and a preparation method thereof need to be researched, so that the storage power station warehouse basin has better seepage prevention performance and physical and chemical properties.
Disclosure of Invention
In view of the above, the invention provides a polyurea coating for preventing seepage of a storage power station warehouse basin and a preparation method thereof, the polyurea coating comprises A, B two components, wherein the polyurea coating is prepared by prepolymerization of polyol, polyisocyanate and modified nano zinc oxide, the modified nano zinc oxide is prepared by modifying the nano zinc oxide by boric acid o-methyl cyclohexanol diethanol amine ester, so that the nano zinc oxide is uniformly distributed on a polyurea body, the performance of the nano zinc oxide is fully exerted, and the aging resistance and the seepage resistance of the polyurea are improved while the excellent physical performance of the polyurea is maintained.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a polyurea coating for preventing seepage of a storage power station reservoir basin, which consists of a component A and a component B, wherein the following unit parts are parts by weight,
the component A is prepared by pre-polymerizing 50-200 parts of polyol, 150-250 parts of polyisocyanate and modified nano zinc oxide;
the component B is prepared by mixing 30-60 parts of amino-terminated polyether, 20-50 parts of polyhydric alcohol, 1-2 parts of coupling agent, 20-40 parts of chain extender, 0-1 part of catalyst, 1-5 parts of water removing agent and 1-5 parts of color paste;
the preparation method of the modified nano zinc oxide comprises the following steps: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
the-NCO content of the component A is 14% -17%, and the isocyanate index of the A, B component is 1.05-1.10;
the A, B components are stored independently, and when in use, the volume ratio of the A, B components is 1: 1, mixing uniformly.
Further, the polyisocyanate is one or a mixture of several of diphenylmethane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexyl diisocyanate and cyclohexanedimethylene isocyanate, xylylene diisocyanate and 1, 4-cyclohexanediisocyanate.
Furthermore, the purity of the boric acid o-methylcyclohexanol ethanolamine ester is more than or equal to 98 percent.
Further, the specific surface area of the nano zinc oxide is 30-50m2The zinc oxide content is higher than 95 percent.
Further, the polyalcohol is one or a mixture of more of polyoxypropylene diol, polytetrahydrofuran ether diol, polycaprolactone diol, polyester diol and polycarbonate diol; the average molecular weight of the polyhydric alcohol is 400-1500, the water content is less than or equal to 0.5 percent, and the acid value is less than or equal to 0.8mg KOH/g.
Further, the amino terminated polyether includes difunctional amino terminated polyether and trifunctional amino terminated polyether.
The chain extender is any one of 3, 5-dimethylthiotoluenediamine, 2, 4-diamino-3, 5-dimethylthiochlorobenzene, 4 ' -bis-sec-butylaminodiphenylmethane, N-dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3 ' -dimethyl-4, 4 ' -diaminodicyclohexylmethane, 4-bis-sec-butylaminodicyclohexylmethane, 3-dimethyl-4, 4-bis-sec-butylaminodicyclohexylmethane, trimethylhexamethylenediamine or hydrogenated MDA.
Further, the coupling agent is one or a compound of more of a silane coupling agent, a borate coupling agent, an aluminate coupling agent, a borate coupling agent, a bimetallic coupling agent and a phosphate coupling agent;
the catalyst is one or a mixture of more of bismuth isooctanoate, zinc isooctanoate, triethylene diamine, dimorpholinodiethyl ether, tetrabutyl borate and tetraisopropyl borate;
the water removing agent is a molecular sieve with the specification of 3a or 4 a.
Furthermore, the color paste is a color paste commonly used in the polyurethane industry, the color of the color paste is any one of red, yellow, blue, green, white and black color pastes, and the water content is less than or equal to 0.5 percent.
The invention also provides a preparation method of the polyurea coating for preventing seepage of the storage power station basin, which comprises the following steps:
(1) preparing modified nano zinc oxide: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
(2) preparation of the component A: stirring and heating 50-200 parts of polyol to 95-105 ℃, adding the modified nano zinc oxide, dehydrating for 5-7 h, relieving the vacuum, cooling to below 50 ℃, adding 150-250 parts of polyisocyanate, reacting for 3-4h at 90 ℃, and discharging after determining the-NCO value;
(3) preparation of the component B: according to the mass ratio of (30-60): (20-50): (1-2): (20-40): (0-1): (1-5): (1-5) stirring, grinding and filtering amino-terminated polyether, polyol, a coupling agent, a chain extender, a catalyst, a water removing agent and color paste;
(4) preparing paint: according to the volume ratio of the A, B components of 1: 1 mixing uniformly for use.
The polyurea coating for preventing seepage of the warehouse basin of the energy storage power station consists of A, B two components, wherein the polyurea coating is prepared by pre-polymerizing polyol, polyisocyanate and modified nano zinc oxide, the modified nano zinc oxide is prepared by modifying nano zinc oxide o-methylcyclohexanol diethanol amine borate, and the zinc borate o-methylcyclohexanol amine borate enables a molecular bridge with special functions to be established between inorganic nano zinc oxide and organic polymer polyurea, so that an interface layer is formed between zinc oxide and polyurea molecular chains, and the interface layer can transfer stress, thereby enhancing the combination between zinc oxide and polyurea molecules, and simultaneously solving the problems of nano zinc oxide agglomeration and uniform dispersion; the nano zinc oxide has large specific surface and high activity, improves the cross-linking density of polyurea, reduces the porosity of polyurea molecules, and shows that the tensile strength and the elongation at break are improved, so that the polyurea has better anti-seepage performance; the nano zinc oxide can also improve the stain resistance, water resistance, alkali resistance and washing resistance of the coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a polyurea coating for preventing seepage of a storage power station reservoir basin, which consists of a component A and a component B, wherein the following unit parts are parts by weight,
the component A is prepared by pre-polymerizing 50-200 parts of polyol, 150-250 parts of polyisocyanate and the modified nano zinc oxide;
the component B is prepared by mixing 30-60 parts of amino-terminated polyether, 20-50 parts of polyhydric alcohol, 1-2 parts of coupling agent, 20-40 parts of chain extender, 0-1 part of catalyst, 1-5 parts of water removing agent and 1-5 parts of color paste;
the preparation method of the modified nano zinc oxide comprises the following steps: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
the-NCO content of the component A is 14% -17%, and the isocyanate index of the A, B component is 1.05-1.10;
the A, B components are stored independently, and when in use, the volume ratio of the A, B components is 1: 1, mixing uniformly.
The coating adopts the nano zinc oxide in the raw materials, the nano zinc oxide has larger influence on the characteristics of the polyurea material, and the cross-linking density of the polyurea is improved and the porosity of polyurea molecules is reduced due to large specific surface and high activity, which shows that the tensile strength and the elongation at break are improved, so that the polyurea has better anti-seepage performance. And the nano zinc oxide active zinc oxide has strong infrared ray absorption capacity, the ratio of the absorption rate to the heat capacity is large, and the ultraviolet shielding rate is as high as 98 percent, so that the anti-aging property of the aromatic polyurea can be improved, and the nano zinc oxide active zinc oxide is more suitable for preventing seepage of an energy storage power station basin in an open-air environment, prolonging the service life of materials and reducing the maintenance cost. In addition, the nano zinc oxide can improve the stain resistance, the water resistance, the alkali resistance and the washing resistance of the coating.
Although nano zinc oxide as a nano filler can improve the performance of polyurea materials, the compatibility problem with polyurea materials must be solved when the nano zinc oxide is used, and in addition, nano zinc oxide is easy to agglomerate, and if the nano zinc oxide is not well dispersed in polyurea, the nano zinc oxide cannot exert the performance. Boric acid o-methylcyclohexanol diethanol amine ester is used as a borate coupling agent, and the borate coupling agent can form chemical combination between an inorganic substance and an organic substance through a chemical bond, so that a two-phase mixture finally forms a homogeneous structure, namely an organic activated monomolecular layer. The boric acid ester coupling agent has two functional groups with different properties in the molecular structure, and one functional group can react with the functional groups such as hydroxyl on the surface of the nano zinc oxide to form a covalent bond; the other end of the amino group can react with the isocyanate group of the polyurea, so that two materials with greatly different properties are firmly bonded, and a molecular bridge with special functions is established between the inorganic nano zinc oxide and the organic polymer polyurea. The coupling agent forms an interface layer between the zinc oxide and the polyurea molecular chain through the action of the molecular bridge, and the interface layer can transfer stress, so that the combination between the zinc oxide and the polyurea molecules is enhanced, and the problems of nano zinc oxide agglomeration and uniform dispersion are solved. In addition, the central boron atom SP2 is hybridized, the orbital configuration is a plane triangle, the number of bonding atoms is 3, the polyurea material has a unique valence electron configuration, and the cross-linking strength and the mechanical property of the polyurea material are improved.
The polyurea coating for preventing the seepage of the warehouse basin of the energy storage power station comprises raw material polyisocyanate which is one or a mixture of more of diphenylmethane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexyl diisocyanate, cyclohexanedimethylene diisocyanate, xylylene diisocyanate, 1,4 cyclohexanediisocyanate and the like.
Wherein the purity of the boric acid o-methylcyclohexanol ethanolamine ester is more than or equal to 98 percent. The specific surface area of the nano zinc oxide is 30-50m2The zinc oxide content is higher than 95 percent.
The polyalcohol is one or more of polyoxypropylene glycol, polytetrahydrofuran ether glycol, polycaprolactone diol, polyester diol, polycarbonate diol, etc.; the average molecular weight of the polyhydric alcohol is 400-1500, the water content is less than or equal to 0.5 percent, and the acid value is less than or equal to 0.8mg KOH/g.
The amino terminated polyether includes difunctional amino terminated polyether and trifunctional amino terminated polyether.
The chain extender is any one of 3, 5-dimethylthiotoluenediamine (E-300), 2, 4-diamino-3, 5-dimethylthiochlorobenzene (TX-2), 4 ' -bis-sec-butylaminodiphenylmethane (Unilink4200), N-dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3 ' -dimethyl-4, 4 ' -diaminodicyclohexylmethane (TX-3), 4-bis-sec-butylaminodicyclohexylmethane, 3-dimethyl-4, 4-bis-sec-butylaminodicyclohexylmethane, trimethylhexamethylenediamine, hydrogenated MDA, or the like.
The coupling agent is one or a compound of more of a silane coupling agent, a borate coupling agent, an aluminate coupling agent, a borate coupling agent, a bimetallic coupling agent, a phosphate coupling agent and the like;
the catalyst is one or a mixture of more of bismuth isooctanoate, zinc isooctanoate, triethylene diamine, dimorpholinodiethyl ether, tetrabutyl borate, tetraisopropyl borate and the like;
the water removing agent is preferably a molecular sieve with the specification of 3a or 4 a.
The color paste is universal in polyurethane industry, the color of the color paste is any one of red, yellow, blue, green, white and black paste, and the water content is less than or equal to 0.5 percent.
The invention also provides a preparation method of the polyurea coating for preventing seepage of the storage power station basin, which comprises the following steps:
(1) preparing modified nano zinc oxide: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
(2) preparation of the component A: stirring and heating 50-200 parts of polyol to 95-105 ℃, adding the modified nano zinc oxide, dehydrating for 5-7 h, relieving the vacuum, cooling to below 50 ℃, adding 150-250 parts of polyisocyanate, reacting for 3-4h at 90 ℃, and discharging after determining the-NCO value;
(3) preparation of the component B: according to the mass ratio of (30-60): (20-50): (1-2): (20-40): (0-1): (1-5): (1-5) stirring, grinding and filtering amino-terminated polyether, polyol, a coupling agent, a chain extender, a catalyst, a water removing agent and color paste;
(4) preparing paint: according to the volume ratio of the A, B components of 1: 1 mixing uniformly for use.
Example 1
A polyurea coating for preventing seepage of a storage power station reservoir basin is prepared by the following steps:
(1) preparing modified nano zinc oxide: in an inert environment, adding 2 parts of nano zinc oxide and 6 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol for ultrasonic dispersion for 1-2 hours, then, carrying out vacuum drying for 12 hours at the temperature of 60 ℃, and sealing and storing in the inert environment for later use;
(2) preparation of the component A: stirring and heating 100 parts of PTMEG1000 to 95 ℃, adding the modified nano zinc oxide prepared in the step (1) under the vacuum-0.1 MPa, dehydrating for 5 hours, relieving the vacuum, cooling to below 50 ℃, adding 200 parts of MDI-50, reacting for 4 hours at 90 ℃, and discharging after determining that the-NCO value is 14%;
(3) preparation of the component B: weighing the components according to the formula sequence, sequentially putting 30 parts of amino-terminated polyether D2000, 20 parts of PTMEG1000,2 parts of silane coupling agent A171, 35 parts of chain extender E100, 0.1 part of catalyst bismuth isooctanoate, 5 parts of 3A molecular sieve and 1 part of color paste into a storage tank of a high-speed dispersion machine, stirring for 15-30 min at room temperature, grinding by a sand mill until the fineness is qualified, and filtering and packaging by a 200-mesh copper filter screen;
(4) preparing paint: according to the volume ratio of the A, B components of 1: 1, mixing uniformly.
The performance test was as follows: the prepared paint is uniformly mixed by a spraying machine and sprayed on the surface of a steel plate, the coating is placed in an environment with the temperature of (25 +/-2) DEG C and the humidity of (50 +/-5)%, and after curing for 7 days, the test performance is as follows: the drawing strength is more than or equal to 8MPa, the tensile strength is 21MPa, the elongation at break is 450 percent, and the tearing strength is 75N/mm.
Example 2
A polyurea coating for preventing seepage of a storage power station reservoir basin is prepared by the following steps:
(1) preparing modified nano zinc oxide: in an inert environment, adding 10 parts of nano zinc oxide and 20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol for ultrasonic dispersion for 1-2 hours, then, carrying out vacuum drying for 12 hours at the temperature of 60 ℃, and sealing and storing in the inert environment for later use;
(2) preparation of the component A: stirring and heating 150 parts of PTMEG1000 to 95 ℃, adding the modified nano zinc oxide obtained in the step (1) under the vacuum-0.1 MPa, dehydrating for 5h, relieving the vacuum, cooling to below 50 ℃, adding 200 parts of MDI-50, reacting for 4h at 90 ℃, and discharging after determining that the-NCO value is 15%;
(3) preparation of the component B: weighing the components according to the formula sequence, sequentially putting 50 parts of amino-terminated polyether D2000, 20 parts of PTMEG650, 1 part of borate coupling agent KR-TTS, 20 parts of chain extender Unilink4200, 1 part of 4A molecular sieve and 4 parts of color paste into a storage tank of a high-speed dispersion machine, stirring for 15-30 min at room temperature, grinding by a sand mill until the fineness is qualified, and filtering and packaging by using a 200-mesh copper filter screen;
(4) preparing paint: according to the volume ratio of the A, B components of 1: 1, mixing uniformly.
The performance test was as follows: the prepared paint is uniformly mixed by a spraying machine and sprayed on the surface of a steel plate, the coating is placed in an environment with the temperature of (25 +/-2) DEG C and the humidity of (50 +/-5)%, and after curing for 7 days, the test performance is as follows: the drawing strength is more than or equal to 8.5MPa, the tensile strength is 26MPa, the elongation at break is 400 percent, and the tearing strength is 80N/mm.
The polyurea coating for preventing seepage of the warehouse basin of the energy storage power station consists of A, B two components, wherein the polyurea coating is prepared by pre-polymerizing polyol, polyisocyanate and modified nano zinc oxide, the modified nano zinc oxide is prepared by modifying nano zinc oxide o-methylcyclohexanol diethanol amine borate, and the zinc borate o-methylcyclohexanol amine borate enables a molecular bridge with special functions to be established between inorganic nano zinc oxide and organic polymer polyurea, so that an interface layer is formed between zinc oxide and polyurea molecular chains, and the interface layer can transfer stress, thereby enhancing the combination between zinc oxide and polyurea molecules, and simultaneously solving the problems of nano zinc oxide agglomeration and uniform dispersion; the nano zinc oxide has large specific surface and high activity, improves the cross-linking density of polyurea, reduces the porosity of polyurea molecules, and shows that the tensile strength and the elongation at break are improved, so that the polyurea has better anti-seepage performance; the nano zinc oxide can also improve the stain resistance, water resistance, alkali resistance and washing resistance of the coating.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The polyurea coating for preventing seepage of the storage power station basin is composed of a component A and a component B, and is characterized in that the following units are parts by weight,
the component A is prepared by pre-polymerizing 50-200 parts of polyol, 150-250 parts of polyisocyanate and modified nano zinc oxide;
the component B is prepared by mixing 30-60 parts of amino-terminated polyether, 20-50 parts of polyhydric alcohol, 1-2 parts of coupling agent, 20-40 parts of chain extender, 0-1 part of catalyst, 1-5 parts of water removing agent and 1-5 parts of color paste;
the preparation method of the modified nano zinc oxide comprises the following steps: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
the-NCO content of the component A is 14% -17%, and the isocyanate index of the A, B component is 1.05-1.10;
the A, B components are stored independently, and when in use, the volume ratio of the A, B components is 1: 1, mixing uniformly.
2. The polyurea coating for preventing seepage of basins of energy storage power stations as claimed in claim 1, wherein the polyisocyanate is one or a mixture of several of diphenylmethane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexyl diisocyanate, cyclohexanedimethylene diisocyanate, xylylene diisocyanate, and 1,4 cyclohexanediisocyanate.
3. The polyurea coating for seepage control of energy storage power station warehouse basins as claimed in claim 1, wherein the purity of the boric acid o-methylcyclohexanol ethanolamine ester is greater than or equal to 98%.
4. The polyurea coating for preventing seepage of basins of energy storage power stations and storehouses of claim 1, wherein the specific surface area of the nano zinc oxide is 30-50m2The zinc oxide content is higher than 95 percent.
5. The polyurea coating for preventing seepage of the basin of the energy storage power station warehouse as claimed in claim 1, wherein the polyalcohol is one or a mixture of polypropylene oxide glycol, polytetrahydrofuran ether glycol, polycaprolactone glycol, polyester glycol and polycarbonate glycol; the average molecular weight of the polyhydric alcohol is 400-1500, the water content is less than or equal to 0.5 percent, and the acid value is less than or equal to 0.8mg KOH/g.
6. The polyurea coating for energy storage power station warehouse basin seepage control of claim 1, wherein the amino-terminated polyether comprises a difunctional amino-terminated polyether and a trifunctional amino-terminated polyether.
7. The polyurea coating for energy storage power station warehouse basin seepage control according to claim 1, wherein the chain extender is any one of 3, 5-dimethylthiotoluenediamine, 2, 4-diamino-3, 5-dimethylthiochlorobenzene, 4 ' -bis-sec-butylaminodiphenylmethane, N-dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3 ' -dimethyl-4, 4 ' -diaminodicyclohexylmethane, 4-bis-sec-butylaminodicyclohexylmethane, 3-dimethyl-4, 4-bis-sec-butylaminodicyclohexylmethane, trimethylhexamethylenediamine, or hydrogenated MDA.
8. The polyurea coating for seepage control of the storage power station warehouse basin as claimed in claim 1, wherein the coupling agent is one or a compound of silane coupling agent, borate coupling agent, aluminate coupling agent, borate coupling agent, bimetallic coupling agent and phosphate coupling agent;
the catalyst is one or a mixture of more of bismuth isooctanoate, zinc isooctanoate, triethylene diamine, dimorpholinodiethyl ether, tetrabutyl borate and tetraisopropyl borate;
the water removing agent is a molecular sieve with the specification of 3a or 4 a.
9. The polyurea coating for seepage control of the storage power station warehouse basin as claimed in claim 1, wherein the color paste is a color paste commonly used in polyurethane industry, the color paste is any one of red, yellow, blue, green, white and black color pastes, and the water content is less than or equal to 0.5%.
10. A method for preparing the polyurea coating for preventing seepage of the basin of the energy storage power station warehouse as claimed in any one of claims 1 to 9, which comprises the following steps:
(1) preparing modified nano zinc oxide: respectively adding 1-10 parts of nano zinc oxide and 2-20 parts of boric acid o-methylcyclohexanol diethanol amine ester into 50 parts of methanol in an inert environment, ultrasonically dispersing for 1-2 hours, then drying in vacuum at 60 ℃ for 12 hours, and sealing in the inert environment for later use;
(2) preparation of the component A: stirring and heating 50-200 parts of polyol to 95-105 ℃, adding the modified nano zinc oxide obtained in the step, dehydrating for 5-7 hours, relieving vacuum, cooling to below 50 ℃, adding 150-250 parts of polyisocyanate, reacting for 3-4 hours at 90 ℃, measuring-NCO value, and discharging;
(3) preparation of the component B: according to the mass ratio of (30-60): (20-50): (1-2): (20-40): (0-1): (1-5): (1-5) stirring, grinding and filtering amino-terminated polyether, polyol, a coupling agent, a chain extender, a catalyst, a water removing agent and color paste;
(4) preparing paint: according to the volume ratio of the A, B components of 1: 1, mixing uniformly and then using.
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