CN109486401B - Waterborne polyurethane waterproof coating and preparation method thereof - Google Patents
Waterborne polyurethane waterproof coating and preparation method thereof Download PDFInfo
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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
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
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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
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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
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K2201/011—Nanostructured additives
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Abstract
The invention relates to the field of polyurethane waterproof coatings, and particularly relates to a waterborne polyurethane waterproof coating and a preparation method thereof. A coating component A is mainly synthesized by the following raw materials: according to parts by weight, 80 parts of polytetrahydrofuran ether glycol, 3-5 parts of tartaric acid, 20-25 parts of isocyanate and 0.5-1 part of nano titanium dioxide. The preparation method comprises the steps of taking polytetrahydrofuran ether glycol, tartaric acid and isocyanate as main raw materials, enabling the tartaric acid and the polytetrahydrofuran ether glycol to contain hydroxyl groups and react with an isohydric acid ester to generate a polymer with a polyaminoester structure, and then carrying out photocatalytic decomposition on an isohydric acid ester residue through nano titanium dioxide to obtain a mixture mainly containing the polymer with the polyaminoester structure, wherein the weight-average molecular weight of the polymer is 9000-12000. The waterborne polyurethane waterproof coating has high solid content, short surface drying time and actual drying time of a coating film, high tensile strength and elongation at break, impermeability and low-temperature flexibility.
Description
Technical Field
The invention relates to the field of polyurethane waterproof coatings, and particularly relates to a waterborne polyurethane waterproof coating and a preparation method thereof.
Background
The polyurethane waterproof coating is a novel high-grade waterproof and anticorrosive coating, can meet the requirements of various roof waterproof projects, is suitable for base layer construction with complicated structures, is particularly suitable for waterproofing and seepage prevention of roofs, basements and washrooms with more pipelines with special structures, ensures the waterproofing and seepage prevention quality of the whole project, overcomes the defects of the traditional asphalt series waterproof coating and waterproof coiled materials, has the advantages of excellent overall waterproof effect, high strength, good elasticity, strong cohesive force, high temperature resistance, simple and convenient construction, easy repair and the like, and is popular with the national and foreign waterproof borders.
The chemical building materials ' nine five and ' fifteen ' and the development planning outline in 2010 and 2015 take polyurethane as a development variety which is mainly popularized. In addition, the construction department publicizes and popularizes and applies the novel building waterproof material, the application proportion of the novel building waterproof in the large and medium-sized cities in the fifteen-period is not less than 50% of the total area of the building waterproof engineering, and reaches 70% in 2010, which undoubtedly brings a large space for the market of the polyurethane waterproof coating, but the polyurethane waterproof coating in the current market is mostly oil-soluble, which is contrary to the national requirement for higher and higher environmental protection, and in addition, because of some problems of the polyurethane in the current market, the novel building waterproof material is not beneficial to site construction. Therefore, the development of the environment-friendly waterborne polyurethane with strong applicability is imminent.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide the waterborne polyurethane waterproof coating which has high solid content, short surface drying time and actual drying time of a coating film, high tensile strength and elongation at break, water impermeability and low-temperature flexibility.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a coating component A is mainly synthesized by the following raw materials: according to parts by weight, 80 parts of polytetrahydrofuran ether glycol, 3-5 parts of tartaric acid, 20-25 parts of isocyanate and 0.5-1 part of nano titanium dioxide.
The isocyanate compounds contain highly unsaturated isocyanate groups and are therefore very reactive chemically. Since the electron cloud density is high on oxygen and nitrogen atoms, the oxygen atom of an isocyanate group (NCO) has the greatest electronegativity and is a nucleophilic center, and can attract a hydrogen atom on an active hydrogen-containing compound molecule to generate a hydroxyl group, but the hydroxyl group on an unsaturated carbon atom is unstable and rearranges to form a carbamate. The carbon atom has the lowest electron cloud density, is stronger electropositive, is an electrophilic center and is easy to be attacked by a nucleophilic reagent. The reaction of the isocyanate with the active hydrogen compound is caused by the attack of the affinity center in the molecule of the active hydrogen compound on the carbon atom of the isocyanate group.
Polytetrahydrofuran ether glycol is a chemical substance and has a molecular formula of HO [ CH2CH2CH2CH2O ] nH. White waxy solids that become clear liquids when the temperature exceeds room temperature. Easily soluble in alcohols, esters, ketones, aromatic hydrocarbons and chlorinated hydrocarbons, and insoluble in aliphatic hydrocarbons and water. As the molecular weight increases, the solubility decreases. PTMEG had water absorption at room temperature. The water absorption depends on the molecular weight, and the maximum water absorption can absorb 2 percent of water. Before use, water is removed and deoxidization is carried out.
The preparation method comprises the steps of taking polytetrahydrofuran ether glycol, tartaric acid and isocyanate as main raw materials, enabling the tartaric acid and the polytetrahydrofuran ether glycol to contain hydroxyl groups and react with an isohydric acid ester to generate a polymer with a polyaminoester structure, and then carrying out photocatalytic decomposition on an isohydric acid ester residue through nano titanium dioxide to obtain a mixture mainly containing the polymer with the polyaminoester structure, wherein the weight-average molecular weight of the polymer is 9000-12000.
The invention also provides a preparation method of the coating component A, which is characterized by comprising the following steps:
mixing polytetrahydrofuran ether glycol and tartaric acid;
and then adding isocyanate for reaction, and after the reaction is finished, adding nano titanium dioxide for photocatalysis to obtain the coating.
The preparation method of the coating component A provided by the invention comprises the steps of mixing polytetrahydrofuran ether glycol and tartaric acid, fully mixing the polytetrahydrofuran ether glycol and the tartaric acid, adding isocyanate to carry out polymerization reaction to obtain a polymer with a polyamino ester structure, adding nano titanium dioxide to carry out photocatalytic decomposition on isocyanate residues, and simultaneously, dispersing the titanium dioxide to obtain the coating component A.
The principle of the photocatalytic decomposition of the nano titanium dioxide is as follows:
TiO2+hv→e-+h+
h++H2O→·OH+H+
e-+O2→O2 -
O2、H2o,. OH + org (organic substance) → CO2+H2O
O2- + org (organic) → CO2+H2O
OH is a main active substance of the photocatalytic reaction. Light with a wavelength less than 385nm is required to use TiO2Excitation of electrons in (1); can also be applied to TiO2Modifying to make TiO2The band gap of (2) is narrowed, thereby further improving the photocatalytic efficiency.
Further, polytetrahydrofuran ether glycol and tartaric acid are mixed in a reaction kettle under the following mixing conditions: the temperature is 30 + -5 deg.C, and the mixing time is 60-80 min.
So as to fully and uniformly mix the two components and provide good conditions for subsequent reaction.
Further, after the isocyanate is added, the reaction is carried out while stirring at the temperature of 60-70 ℃, and the reaction time is 100-150 min.
Further, after the reaction is finished, cooling to below 40 ℃ and filling.
The invention also provides a waterborne polyurethane waterproof coating, which comprises the coating component A and the coating component B;
the coating component B is mainly prepared by mixing the following raw materials: according to parts by weight, 28-35 parts of coumarone resin, 0.2-0.4 part of sodium dodecyl benzene sulfonate, 0.2-0.4 part of dibutyltin dilaurate, 28-35 parts of talcum powder, 4.0-4.5 parts of calcium hydroxide and 7.5-8.5 parts of water.
Further, the coating component B is prepared by the following steps:
dispersing coumarone resin, sodium dodecyl benzene sulfonate and dibutyltin dilaurate in water to obtain an emulsion;
adding talcum powder and calcium hydroxide, and continuously dispersing to obtain a base material;
and dispersing and grinding to obtain the coating component B.
Further, in the step of dispersing the coumarone resin, the Tween-80 and the dibutyltin dilaurate in water, the dispersing speed is 500-550 r/min;
adding talcum powder and calcium hydroxide, and continuously dispersing at the speed of 950-;
in the step of obtaining the coating component B through dispersion and grinding, the dispersion speed is 500-550 r/min.
Furthermore, the dispersion time is 15-20 min.
Further, the dispersion is carried out in a high-speed disperser.
Further, the grinding speed is 80-90 r/min. The grinding time is generally 20-30 min.
Further, filtering and filling are carried out after grinding.
The invention also provides a water-based polyurethane waterproof coating which is prepared by mixing the coating component A and the coating component B.
The waterborne polyurethane waterproof coating provided by the invention is prepared in situ.
Further, the weight ratio of the coating component A to the coating component B is 1: 3-4.
The two components are mixed together and then uniformly mixed for use.
Compared with the prior art, the invention has the beneficial effects that:
(1) the waterborne polyurethane waterproof coating provided by the invention has the advantages of high solid content, short surface drying time and actual drying time of a coating film, high tensile strength and elongation at break, and impermeability and low-temperature flexibility.
(2) The waterborne polyurethane waterproof coating provided by the invention is simple and convenient to prepare and facilitates industrial production.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The component A comprises the following production steps:
weighing 80kg of polytetrahydrofuran ether glycol and 3kg of tartaric acid, putting into a vacuum reaction kettle, and stirring at 30 +/-5 ℃ for 70 min;
adding 20kg of isocyanate into the materials, stirring at 65 ℃, reacting for 120min in a vacuum reaction kettle, and adding 0.5kg of nano titanium dioxide for ultraviolet light catalysis;
and cooling the obtained product to 40 ℃ after the synthesis reaction, and filling to obtain the component A of the waterproof coating.
The production steps of the component B are as follows:
weighing 28kg of coumarone, 0.2kg of sodium dodecyl benzene sulfonate, 7.5kg of water and 0.2kg of dibutyltin dilaurate, putting coumarone resin, sodium dodecyl benzene sulfonate, dibutyltin dilaurate and water into a high-speed dispersion machine, and dispersing at a high speed for 15min at a rotating speed of 500r/min to prepare an emulsion;
adding 28kg of talcum powder and 4.0kg of calcium hydroxide into the emulsion, and dispersing for 15min by using a high-speed dispersion machine under the high-speed dispersion of 950r/min to prepare a base material;
dispersing for 15min by a high-speed dispersion machine at the rotating speed of 500r/min to prepare a semi-finished product;
and (3) putting the semi-finished product into a grinder, grinding for 20min at the speed of 80r/min, and then filtering and filling to obtain the waterproof coating B component.
When in use, the component A comprises the following components in percentage by weight: and (3) mixing the component A and the component B according to the proportion of 1:3, and mechanically stirring for 10min to obtain the waterproof coating.
Taking the waterproof coating according to the proportion of 320g/m2And (4) coating twice, wherein after the first coating is finished, coating twice after curing, and controlling the coating thickness to be 1.5-2.0 mm.
Example 2
The component A comprises the following production steps:
weighing 80kg of polytetrahydrofuran ether glycol and 5kg of tartaric acid, putting into a vacuum reaction kettle, and stirring for 80min at the temperature of 30 +/-5 ℃;
adding 25kg of isocyanate into the materials, stirring at 65 ℃, reacting for 150min in a vacuum reaction kettle, and adding 1kg of nano titanium dioxide for ultraviolet light catalysis;
and cooling the obtained product to 40 ℃ after the synthesis reaction, and filling to obtain the component A of the waterproof coating.
The production steps of the component B are as follows:
weighing 35kg of coumarone, 0.4kg of sodium dodecyl benzene sulfonate, 8.5kg of water and 0.4kg of dibutyltin dilaurate, putting coumarone resin, sodium dodecyl benzene sulfonate, dibutyltin dilaurate and water into a high-speed dispersion machine, and dispersing at a high speed for 20min at a rotating speed of 550r/min to prepare an emulsion;
adding 30kg of talcum powder and 4.2kg of calcium hydroxide into the emulsion, and dispersing for 20min by using a high-speed dispersion machine under the high-speed dispersion of 1000r/min to prepare a base material;
dispersing for 20min by a high-speed dispersion machine at the rotating speed of 550r/min to prepare a semi-finished product;
and (3) putting the semi-finished product into a grinder, grinding for 25min at the speed of 90r/min, and then filtering and filling to obtain the waterproof coating B component.
When in use, the component A comprises the following components in percentage by weight: and (3) mixing the component A and the component B according to the proportion of 1:3, and mechanically stirring for 10min to obtain the waterproof coating.
Taking the waterproof coating according to the proportion of 320g/m2And (4) coating twice, wherein after the first coating is finished, coating twice after curing, and controlling the coating thickness to be 1.5-2.0 mm.
Example 3
The component A comprises the following production steps:
weighing 80kg of polytetrahydrofuran ether glycol and 4kg of tartaric acid, putting into a vacuum reaction kettle, and stirring at 30 +/-5 ℃ for 70 min;
adding 22kg of isocyanate into the materials, stirring at 65 ℃, reacting for 150min in a vacuum reaction kettle, and adding 1kg of nano titanium dioxide for ultraviolet light catalysis;
and cooling the obtained product to 40 ℃ after the synthesis reaction, and filling to obtain the component A of the waterproof coating.
The production steps of the component B are as follows:
weighing 35kg of coumarone, 0.4kg of sodium dodecyl benzene sulfonate, 8.5kg of water and 0.4kg of dibutyltin dilaurate, putting coumarone resin, sodium dodecyl benzene sulfonate, dibutyltin dilaurate and water into a high-speed dispersion machine, and dispersing at a high speed for 20min at a rotating speed of 500r/min to prepare an emulsion;
adding 30kg of talcum powder and 4.2kg of calcium hydroxide into the emulsion, and dispersing for 20min by using a high-speed dispersion machine under the high-speed dispersion of 1000r/min to prepare a base material;
dispersing for 20min by a high-speed dispersion machine at the rotating speed of 500r/min to prepare a semi-finished product;
and (3) putting the semi-finished product into a grinder, grinding for 25min at the speed of 80r/min, and then filtering and filling to obtain the waterproof coating B component.
When in use, the component A comprises the following components in percentage by weight: and (3) mixing the component A and the component B according to the proportion of 1:3, and mechanically stirring for 10min to obtain the waterproof coating.
Taking the waterproof coating according to the proportion of 320g/m2And (4) coating twice, wherein after the first coating is finished, coating twice after curing, and controlling the coating thickness to be 1.5-2.0 mm.
Comparative example 1
The component A comprises the following production steps:
weighing 80kg of polytetrahydrofuran ether glycol and 0.8kg of tartaric acid, putting into a vacuum reaction kettle, stirring at 100 ℃ and 0.08Mpa for 80 min;
adding 18kg of isocyanate into the materials, stirring at 60 ℃, and reacting in a vacuum reaction kettle for 120 min;
and cooling the obtained product to 40 ℃ after the synthesis reaction, and filling to obtain the component A of the waterproof coating.
The production steps of the component B are as follows:
weighing 30kg of coumarone, 8kg of tween-800.3 kg of water and 0.3kg of dibutyltin dilaurate, putting coumarone resin, tween-80, dibutyltin dilaurate and water into a high-speed dispersion machine, and dispersing at a high speed for 20min at a rotating speed of 500r/min to prepare an emulsion;
adding 30kg of talcum powder and 4.2kg of calcium hydroxide into the emulsion, and dispersing for 20min by using a high-speed dispersion machine under the high-speed dispersion of 1000r/min to prepare a base material;
adding 0.007kg RQT-X-1 high-efficiency ultraviolet absorbent into the base material, and dispersing for 20min by a high-speed dispersion machine at the rotating speed of 500r/min to obtain a semi-finished product;
and (3) putting the semi-finished product into a grinder, grinding at the speed of 80r/min, and then filtering and filling to obtain the waterproof coating B component.
When in use, the component A comprises the following components in percentage by weight: and (3) mixing the component A and the component B according to the proportion of 1:3, and mechanically stirring for 10min to obtain the waterproof coating.
Taking the waterproof coating according to the proportion of 320g/m2And (4) coating twice, wherein after the first coating is finished, coating twice after curing, and controlling the coating thickness to be 1.5-2.0 mm.
Comparative example 2
The amount of tartaric acid was 1kg, which was the same as in example 3.
Comparative example 3
The amount of tartaric acid was 2kg, which was the same as in example 3.
Comparative example 4
The difference from example 3 is that no nano titanium dioxide is added, and the rest is the same.
The coatings obtained in example 1 and comparative examples 1 to 4 were subjected to property tests, and the results are shown in tables 1 and 2.
Table 1 paint property testing provided by the examples of the present invention
Table 2 paint property testing of the comparative examples of the invention
From the above, the waterborne polyurethane waterproof coating provided by the invention has the advantages of high solid content, short surface drying time and actual drying time of a coating film, high tensile strength and elongation at break, water impermeability and low-temperature flexibility.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (12)
1. The water-based polyurethane waterproof coating is characterized by comprising a coating component A and a coating component B;
the coating component A is mainly synthesized from the following raw materials: 80 parts of polytetrahydrofuran ether glycol, 3-5 parts of tartaric acid, 20-25 parts of isocyanate and 0.5-1 part of nano titanium dioxide;
the coating component B is mainly prepared by mixing the following raw materials: according to parts by weight, 28-35 parts of coumarone resin, 0.2-0.4 part of sodium dodecyl benzene sulfonate, 0.2-0.4 part of dibutyltin dilaurate, 28-35 parts of talcum powder, 4.0-4.5 parts of calcium hydroxide and 7.5-8.5 parts of water.
2. The waterborne polyurethane waterproof coating of claim 1, wherein the preparation method of the coating component A comprises the following steps:
mixing polytetrahydrofuran ether glycol and tartaric acid;
and then adding isocyanate for reaction, and after the reaction is finished, adding nano titanium dioxide for photocatalysis to obtain the coating.
3. The waterborne polyurethane waterproof coating of claim 2, wherein the polytetrahydrofuran ether glycol and the tartaric acid are mixed in a reaction kettle under the following conditions: the temperature is 30 + -5 deg.C, and the mixing time is 60-80 min.
4. The waterborne polyurethane waterproof coating as claimed in claim 3, wherein the reaction is carried out while stirring at 60-70 ℃ after the isocyanate is added, and the reaction time is 100-150 min.
5. The waterborne polyurethane waterproof coating of claim 4, wherein the temperature is reduced to below 40 ℃ after the reaction is completed, and the filling is performed.
6. The waterborne polyurethane waterproof coating of claim 1, wherein the coating component B is prepared by the following steps:
dispersing coumarone resin, sodium dodecyl benzene sulfonate and dibutyltin dilaurate in water to obtain an emulsion;
adding talcum powder and calcium hydroxide, and continuously dispersing to obtain a base material;
and dispersing and grinding to obtain the coating component B.
7. The waterborne polyurethane waterproof coating of claim 1, wherein in the step of dispersing the coumarone resin, the tween-80 and the dibutyltin dilaurate in water, the dispersion speed is 500-550 r/min;
adding talcum powder and calcium hydroxide, and continuously dispersing at the speed of 950-;
in the step of obtaining the coating component B through dispersion and grinding, the dispersion speed is 500-550 r/min.
8. The waterborne polyurethane waterproof coating of claim 1, wherein the dispersion time is 15-20 min.
9. The aqueous polyurethane waterproofing paint according to claim 8, wherein the dispersion is carried out in a high-speed dispersing machine.
10. The aqueous polyurethane waterproof coating material according to claim 6, wherein the grinding speed is 80 to 90 r/min.
11. The aqueous polyurethane waterproofing paint according to claim 10, wherein the filtration and filling are performed after grinding.
12. The aqueous polyurethane waterproofing coating according to any of claims 1 to 11, wherein the weight ratio of the coating component a to the coating component B is 1:2 to 3.
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| CN103666261B (en) * | 2013-12-23 | 2016-06-01 | 李崇 | The uncured rubber asphalt waterproof coating of high solids content solvent-borne type and preparation method |
| CN104087149B (en) * | 2014-07-21 | 2016-04-27 | 段宝荣 | A kind of preparation method of light-resistant waterborne polyurethane coating |
| CN104403548B (en) * | 2014-12-29 | 2016-10-05 | 中科院广州化学有限公司 | Containing polyether polyol/nano-TiO2the aqueous polyurethane coating of hybrid material |
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