CN111117468A - Semi-submersible curing type single-component polyurethane waterproof coating and preparation method thereof - Google Patents
Semi-submersible curing type single-component polyurethane waterproof coating and preparation method thereof Download PDFInfo
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- CN111117468A CN111117468A CN201911397836.9A CN201911397836A CN111117468A CN 111117468 A CN111117468 A CN 111117468A CN 201911397836 A CN201911397836 A CN 201911397836A CN 111117468 A CN111117468 A CN 111117468A
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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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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Abstract
The invention belongs to the field of materials, and discloses a semi-submersible curing type single-component polyurethane waterproof coating and a preparation method thereof. The preparation method comprises the following steps: 1) polyether polyol, a plasticizer, a defoaming agent, a dispersing agent and solid powder are uniformly mixed and heated, and then vacuum dehydration is carried out; 2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, adding solvent oil; continuously reducing the temperature to 60-70 ℃, adding isocyanate, and then heating to 80-90 ℃ for reaction; 3) cooling the mixture obtained in the step 2), adding a catalyst, and heating for reaction; 4) and (3) cooling the mixture obtained in the step 3), adding a latent curing agent and a flatting agent, continuously cooling to 40-60 ℃, and degassing in vacuum to obtain the semi-latent curing type single-component polyurethane waterproof coating which is free of bubbles in appearance, high in drying speed and good in storage performance.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to a semi-latent curing type single-component polyurethane waterproof coating and a preparation method thereof.
Background
At present, the waterproof coatings used in the market mainly comprise polyurethane waterproof coatings, acrylate waterproof coatings, polymer cement composite waterproof coatings, polymer modified emulsified asphalt waterproof coatings and the like. Among them, the polyurethane waterproof coating has been generally accepted and applied in the construction industry with excellent physical properties, chemical properties and workability. The polyurethane waterproof paint mainly comprises a single-component polyurethane waterproof paint and a double-component polyurethane waterproof paint. The two-component polyurethane waterproof coating is prepared on a construction site, and problems of foaming, bulging, stickiness, poor adhesion and the like of a coating film of the two-component polyurethane waterproof coating are caused due to inaccurate proportion and uneven stirring, so that waterproof quality accidents are caused finally. Compared with a double-component polyurethane waterproof coating which needs to mix two components in advance before construction, the single-component polyurethane waterproof coating does not need to be stirred before construction, metering errors cannot occur, construction is convenient, the requirement on the quality of constructors is not high, and risks of inaccurate proportion metering and uneven mixing of the two components do not exist. Therefore, one-component polyurethane waterproof coatings are always one of the most important waterproof materials in the civil and industrial construction fields.
The single-component polyurethane waterproof paint is prepared by carrying out chemical reaction and physical mixing on a prepolymer containing isocyanate groups, which is generated by carrying out polymerization reaction on polyol and isocyanate, a filler and various functional auxiliaries in a reaction kettle. The finished waterproof paint is a single component, does not need to be stirred and mixed during construction, is directly brushed for use, and has the characteristics of excellent comprehensive performance and convenience and quickness in construction. The single-component polyurethane waterproof coating is amorphous liquid before construction and curing, is easy to construct for any base layer with complex shape, vertical and horizontal pipelines and variable cross section, is especially easy to treat at the concave and convex corners, corner channel roots, water falling ports and the head part of the waterproof layer, and can form an integral coating waterproof layer with flexibility and no seams. The cured single-component polyurethane waterproof coating has excellent mechanical properties, good elasticity and tensile property, and extraordinary low-temperature resistance, and can be bent at-59 ℃ without cracking. However, the existing single-component polyurethane waterproof paint generally has the defects of a large amount of bubbles in a coating film, poor performance after construction and water leakage risk or short storage time.
Disclosure of Invention
The invention aims to provide a novel semi-latent curing type single-component polyurethane waterproof coating and a preparation method thereof.
In order to achieve the above object, the present invention provides a method for preparing a semi-latent curable one-component polyurethane waterproof coating, comprising:
1) uniformly mixing polyether polyol, a plasticizer, a defoaming agent, a dispersing agent and solid powder, heating to 95-115 ℃, and then carrying out vacuum dehydration;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, adding solvent oil; when the temperature is continuously reduced to 60-70 ℃, adding isocyanate, and then heating to 80-90 ℃ for reaction;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding a catalyst, and heating to 70-80 ℃ for reaction;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding a latent curing agent and a flatting agent, then continuously cooling to 40-60 ℃, and degassing under vacuum to prepare a semi-latent curing type single-component polyurethane waterproof coating;
wherein the adding amount m of the latent curing agentDosage ofCalculated by the formulas 1-3:
mdosage of＝nNCO×mEquivalent weightX (25-60)% of formula 3
Wherein the content of the first and second substances,
nNCOresidual NCO molar weight;
mNCOthe amount of isocyanate used;
MNCOisocyanate equivalent weight;
m-OHithe amount of polyether polyol i;
M-OHiequivalent weight of polyether polyol i;
mequivalent weightEquivalents of latent curative;
Mrelative molecular massRelative molecular mass of the latent curative;
nfunctionality degreeThe functionality of the latent curative;
mdosage ofThe amount of latent curing agent.
The equivalent weight of each compound mentioned above is the molecular weight per unit functionality in each compound molecule, i.e. the equivalent weight is the ratio of the molecular weight to the functionality.
The preparation method is preferably as follows:
1) uniformly stirring polyether polyol, a plasticizer, a defoaming agent, a dispersing agent and solid powder at the rotating speed of 200-400 r/min, heating to 95-115 ℃, and then carrying out vacuum dehydration for 1-3 h at the pressure of-0.09 to-0.1 MPa and the temperature of 105-110 ℃;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, adding solvent oil; when the temperature is continuously reduced to 60-70 ℃, adding isocyanate, stirring for 5-15 min, then heating to 80-90 ℃, and reacting for 1-3 h;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding a catalyst, stirring for 2-8 min, heating to 70-80 ℃, and reacting for 0.2-0.8 h;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding the latent curing agent and the flatting agent, stirring for 20-40 min, then continuously cooling to 40-60 ℃, and degassing for 10-30 min under the pressure of-0.08 MPa to-0.1 MPa to prepare the semi-latent curing type single-component polyurethane waterproof coating.
According to the invention, preferably, in the preparation process, the mass percentage of the used amount of each component is as follows: 24.80-32.15% of polyether polyol, 7.85-18.7% of plasticizer, 0.08-0.5% of defoaming agent, 0.08-0.2% of dispersing agent, 42.69-53.1% of solid powder, 0.03-0.10% of catalyst and 0.08-0.18% of flatting agent; the dosage of the latent curing agent is 0.98-1.68.
In the invention, polyether polyol and isocyanate are subjected to chemical reaction to form a prepolymer with a reticular cross-linked structure and form a basic skeleton of the coating, preferably, the polyether polyol is polyether diol and/or polyether triol, more preferably a mixture of the polyether diol and the polyether triol, wherein the dosage ratio of the polyether diol to the polyether triol is preferably 2.0-4.5: 1. In the present invention, the polyether diol preferably has at least one of molecular weights of 500, 1000 and 2000, and the polyether triol preferably has at least one of molecular weights of 1000, 3000 and 5000; the isocyanate is at least one of MDI-50, MDI-100, TDI80 and TDI 65.
In the invention, a defoaming agent is added into the system, and the crosslinking speed at the initial stage of curing is slowed down by controlling the surface drying time of the coating, so that the speed of viscosity increase in the curing process is controlled, bubbles can conveniently overflow from a coating film, and the purpose of eliminating the bubbles is achieved.
In the invention, the dispersing agent not only has the effect of enhancing the dispersion of the filler and reducing the viscosity of the product, but also can play a role in inhibiting to a certain extent, and is matched with the catalytic action of the latent curing agent to control the drying time of a coating film, so that bubbles can overflow from the coating to achieve the purpose of defoaming.
In order to further reduce the viscosity and improve the low temperature resistance and flexibility of the coating film, the plasticizer is preferably at least one of chlorinated paraffin, DINP, DINCH, heavy aromatic hydrocarbon, and synthetic vegetable ester.
In the present invention, the solid powder is at least one of heavy calcium, talc powder, light calcium, quartz powder, calcium oxide and kaolin conventionally used in the art, and preferably, the particle sizes of the heavy calcium, the talc powder, the light calcium, the quartz powder, the calcium oxide and the kaolin are at least one of 600 meshes, 800 meshes and 1250 meshes, respectively.
According to the invention, preferably, the solvent oil is at least one of 100#, 150#, 200# solvent oil; the latent curing agent is an imine and/or oxazolidine; the leveling agent is at least one of polydimethylsiloxane, polymethylphenylsiloxane, polyether polyester modified organic siloxane and alkyl modified organic siloxane.
In the present invention, in order to better control the reaction rate and the drying rate of the synthesis, it is preferable that the catalyst is at least one of DMDEE, organotin, zinc isooctanoate, and lead isooctanoate.
The invention also provides a waterproof coating prepared by the preparation method.
Compared with the prior art, the waterproof coating prepared by the preparation method provided by the invention has no bubbles and no pinholes, and has excellent storage performance. Meanwhile, the accurate dosage of the latent curing agent is further obtained by calculating the molar weight of the residual NCO, so that the addition amount of the latent curing agent is more accurate.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein.
The raw material information referred to in the following examples of the invention is as follows:
polyether polyol: polyether diol TDB-2000, polyether triol TEP-330N, available from Tianjin petrochemical;
plasticizer: DINP, available from exxonmobil; synthetic vegetable esters, available from Guangzhou Xianghu chemical industry and trade Co., Ltd; chlorinated paraffin 52# purchased from Nanjing national Wei chemical Co., Ltd;
acid dispersant: FT-202, available from Suzhou non-brother New Material Co., Ltd;
defoaming agent: BYK-065 available from Rabdosia coatings, Inc.;
solid-state filler: 1250 mesh talc, purchased from beijing chang national ltd; 800 mesh coarse whiting, purchased from Jiangxi Guangyi chemical Co., Ltd;
solvent oil: 150# solvent oil, purchased from Jiangsu Hualun chemical Co., Ltd;
isocyanate: TDI-80, available from Pasteur;
organotin catalyst: t-12, available from Tianjin Akeli International trade, Inc.;
latent curing agent: ALT-402 with an equivalent weight of 160g/mol, available from Ailite chemical Co., Ltd, Anxiang;
leveling agent: AFCONA 3236 available from Tianjin Akori International trade, Inc.;
example 1
1) 225g of polyether diol, 62g of polyether triol, 30.35g of chlorinated paraffin, 54.1g of synthetic vegetable ester, 29.4g of DINP, 2.1g of defoaming agent BYK-065, 1g of acidic dispersant non-FT-202, 115g of talcum powder and 329g of heavy calcium are stirred uniformly at the rotating speed of 200-400 r/min and then heated to 95-115 ℃, and then vacuum dehydration is carried out for 1-3 h at the pressure of-0.09 MPa to-0.1 MPa and the temperature of 105-110 ℃;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, 85g of No. 150 solvent oil is added; when the temperature is continuously reduced to 60-70 ℃, adding 39.85g of TDI-80, stirring for 5-15 min, heating to 80-90 ℃, and reacting for 1-3 h;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding 0.5g of organic tin catalyst T-12, stirring for 2-8 min, heating to 70-80 ℃, and reacting for 0.2-0.8 h;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding 15g of latent curing agent ALT-402 and 1g of flatting agent AFCONA 3236, stirring for 20-40 min, then continuously cooling to 40-60 ℃, and degassing for 10-30 min under the pressure of-0.08 MPa to-0.1 MPa to prepare a semi-latent curing type single-component polyurethane waterproof coating;
the calculation method of the latent curing agent ALT-402 comprises the following steps: in the embodiment, the dosage of TDI-80 is 39.85g, and the equivalent weight is 87 g/mol; the using amount of the polyether glycol is 225g, and the equivalent weight is 1000 g/mol; the amount of the polyether triol used was 62g, the equivalent weight was 1666.67g/mol, and the percentage of the latent curing agent added was 47.8% of the theoretical value, from which it was found that the amount of the latent curing agent used was:
example 2
1) 105.89g of polyether diol, 37.4g of polyether triol, 20.66g of chlorinated paraffin, 21g of synthetic vegetable ester, 18.97g of DINP, 1.72g of defoamer BYK-065, 0.57g of acidic dispersant non-FT-202, 61.53g of talcum powder and 188.31g of coarse whiting are stirred uniformly at the rotating speed of 200-400 r/min, heated to 95-115 ℃, and then vacuum dehydrated for 1-3 hours at the temperature of 105-110 ℃ under the pressure of-0.09 to-0.1 MPa;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, 48.66g of No. 150 solvent oil is added; when the temperature is continuously reduced to 60-70 ℃, 22.81g of TDI-80 is added, stirred for 5-15 min and then heated to 80-90 ℃ for reaction for 1-3 h;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding 0.29g of organic tin catalyst T-12, stirring for 2-8 min, heating to 70-80 ℃, and reacting for 0.2-0.8 h;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding 5.60g of latent curing agent ALT-402 and 0.57g of flatting agent AFCONA 3236, stirring for 20-40 min, then continuously cooling to 40-60 ℃, and degassing for 10-30 min under the pressure of-0.08 MPa to-0.10 MPa to prepare a semi-latent curing type single-component polyurethane waterproof coating;
the calculation method of the latent curing agent ALT-402 comprises the following steps: in the embodiment, the using amount of TDI-80 is 22.81g, and the equivalent weight is 87 g/mol; the using amount of the polyether glycol is 105.89g, and the equivalent weight is 1000 g/mol; the amount of polyether triol used was 37.4g, the equivalent weight was 1666.67g/mol, and the percentage of latent hardener addition was 26.1% of the theoretical value, from which it was found that the amount of latent hardener used was:
mdosage of＝nNCo×mEquivalent weight×26.1％
＝0.134mol×l60g/mol×26.1％＝5.6g。
Example 3
1) Uniformly stirring 450g of polyether diol, 132g of polyether triol, 83.03g of chlorinated paraffin, 60.7g of synthetic vegetable ester, 124.43g of DINP, 6.9g of defoaming agent BYK-065, 2.3g of non-FT-202 acidic dispersing agent, 247.25g of talcum powder and 783.43g of heavy calcium at the rotation speed of 200-400 r/min, heating to 95-115 ℃, and then carrying out vacuum dehydration for 1-3 h at the pressure of-0.09 to-0.1 MPa and the temperature of 105-110 ℃;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, 205.6g of No. 150 solvent oil is added; when the temperature is continuously reduced to 60-70 ℃, adding 91.66g of TDI-80, stirring for 5-15 min, then heating to 80-90 ℃, and reacting for 1-3 h;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding 1.15g of organic tin catalyst T-12, stirring for 2-8 min, heating to 70-80 ℃, and reacting for 0.2-0.8 h;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding 27.58g of latent curing agent ALT-402 and 2.3g of flatting agent AFCONA 3236, stirring for 20-40 min, then continuously cooling to 40-60 ℃, and degassing for 10-30 min under the pressure of-0.08 MPa to-0.10 MPa to prepare a semi-latent curing type single-component polyurethane waterproof coating;
the calculation method of the latent curing agent ALT-402 comprises the following steps: in the embodiment, the dosage of TDI-80 is 91.66g, and the equivalent weight is 87 g/mol; the using amount of the polyether glycol is 450g, and the equivalent weight is 1000 g/mol; the polyether triol is used in an amount of 132g, the equivalent weight is 1666.67g/mol, and the percentage of latent hardener added is 32.9% of the theoretical value, from which it can be seen that the amount of latent hardener is:
comparative example 1
In comparison with example 1, comparative example 1 differs only in that: no latent curing agent was added.
Comparative example 2
In comparison with example 1, comparative example 2 differs only in that: the percentage of the latent hardener added in comparative example 2 is 90% of the theoretical value, which is:
the semi-latent curable one-component polyurethane waterproof coatings prepared in examples 1 to 3 and the waterproof coatings prepared in comparative examples 1 to 2 were subjected to performance tests, and the test results are shown in table 1:
TABLE 1
As can be seen from Table 1, the performance of the semi-latent curing type single-component polyurethane waterproof coating prepared by the preparation method of the invention meets the national standard.
The waterproof coatings prepared in examples 1 to 3 and comparative examples 1 to 2 were stored in 5 identical 1000ml iron cans having excellent sealability in an oven at 50 ℃ for a certain period of time, and then the kinematic viscosity of the coatings was measured at 25 ℃ to evaluate the storage properties, and the results are shown in Table 2:
TABLE 250 ℃ Change in viscosity on thermal storage (unit: mpa.s)
| Length of storage time | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Initial value | 7100 | 7260 | 6930 | 7800 | 6820 |
| 1 week | 8500 | 9110 | 8650 | 7960 | 13400 |
| 2 weeks | 9760 | 10800 | 10300 | 8070 | 22800 |
| 3 weeks | 11800 | 12100 | 12500 | 7900 | 38500 |
| 4 weeks | 12500 | 13600 | 13400 | 8200 | 81400 |
The waterproof coatings prepared in examples 1 to 3 and comparative examples 1 to 2 were respectively subjected to tensile tests, and the results are shown in Table 3:
TABLE 3 tensile Property Change (Unit: MPa)
As can be seen from tables 2-3, the viscosity of the waterproof coating prepared by the method is only slightly increased when the waterproof coating is stored at 50 ℃, and the tensile strength of the waterproof coating is almost unchanged along with the extension of the storage time under the normal-temperature storage; in contrast, the viscosity of the waterproof coating prepared in comparative example 2 is greatly increased in the heat storage process, which affects the construction and the shelf life of the product. Although the waterproof coating material prepared in comparative example 1 has substantially no change in viscosity when stored at 50 ℃, the tensile strength thereof is significantly reduced or even failed (≦ 2.00MPa) with the waterproof coating material prepared in comparative example 2 as the storage time is prolonged.
The waterproof coating prepared by the method has the elongation rate which is in a descending trend along with the prolonging of the storage time under the normal-temperature storage, and still meets the national standard (the elongation rate is more than or equal to 500%) after 6 months. The waterproof coatings prepared in comparative examples 1 and 2 have extremely rapid attenuation of elongation with prolonged storage time, and the elongation after storage for two months does not meet the national standard (the elongation is less than or equal to 500%).
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A preparation method of a semi-latent curing type single-component polyurethane waterproof coating is characterized by comprising the following steps:
1) uniformly mixing polyether polyol, a plasticizer, a defoaming agent, a dispersing agent and solid powder, heating to 95-115 ℃, and then carrying out vacuum dehydration;
2) when the water content in the mixture in the step 1) is less than or equal to 0.02 wt%, cooling; when the temperature is reduced to 75-85 ℃, adding solvent oil; when the temperature is continuously reduced to 60-70 ℃, adding isocyanate, and then heating to 80-90 ℃ for reaction;
3) cooling the mixture obtained in the step 2) to 60-70 ℃, adding a catalyst, and heating to 70-80 ℃ for reaction;
4) cooling the mixture obtained in the step 3) to 60-70 ℃, adding a latent curing agent and a flatting agent, then continuously cooling to 40-60 ℃, and degassing under vacuum to prepare a semi-latent curing type single-component polyurethane waterproof coating;
wherein the dosage m of the latent curing agentDosage ofCalculated by the formulas 1-3:
mdosage of＝nNCO×mEquivalent weightX (25-60)% of formula 3
Wherein the content of the first and second substances,
nNCOresidual NCO molar weight;
mNCOthe amount of isocyanate used;
MNCOisocyanate equivalent weight;
m-OHithe amount of polyether polyol i;
M-OHiequivalent weight of polyether polyol i;
mequivalent weightEquivalents of latent curative;
Mrelative molecular massRelative molecular mass of the latent curative;
nfunctionality degreeThe functionality of the latent curative;
mdosage ofThe amount of latent curing agent.
2. The preparation method according to claim 1, wherein in the preparation process, the mass percentage of the used amount of each component is as follows: 24.80-32.15% of polyether polyol, 7.85-18.70% of plasticizer, 0.08-0.5% of defoaming agent, 0.08-0.2% of dispersing agent, 42.69-53.10% of solid powder and 8-11.5% of solvent oil; 4-4.96% of isocyanate; 0.03-0.10% of catalyst and 0.08-0.18% of flatting agent; the dosage of the latent curing agent is 0.98-1.68%.
3. The preparation method according to claim 1, wherein in the step (1), the polyether polyol, the plasticizer, the defoaming agent, the dispersing agent and the solid powder are uniformly stirred at a rotation speed of 200-400 r/min and then heated to 95-115 ℃, and the vacuum dehydration is performed for 1-3 hours at a pressure of-0.09-0.1 MPa and a temperature of 105-110 ℃.
4. The preparation method of claim 1, wherein in the step (2), the isocyanate is added, stirred for 5-15 min and then heated to 80-90 ℃ for reaction for 1-3 h.
5. The preparation method according to claim 1, wherein in the step (3), the catalyst is added, stirred for 2-8 min, heated to 70-80 ℃ and reacted for 0.2-0.8 h.
6. The preparation method of claim 1, wherein in the step (4), the latent curing agent and the leveling agent are added and stirred for 20-40 min, then the temperature is continuously reduced to 40-60 ℃, and degassing is carried out for 10-30 min under the pressure of-0.08 MPa to-0.1 MPa, so as to prepare the semi-latent curing type single-component polyurethane waterproof coating.
7. The production method according to claim 1, wherein the polyether polyol is a polyether diol and/or a polyether triol, the polyether diol has a molecular weight of at least one of 500, 1000 and 2000, and the polyether triol has a molecular weight of at least one of 1000, 3000 and 5000.
8. The method according to claim 1, wherein the plasticizer is at least one of chlorinated paraffin, DINP, DINCH, heavy aromatic hydrocarbon, synthetic vegetable ester;
the defoaming agent is at least one of polysiloxane diisobutyl ketone solution, polymer and polysiloxane solution, polysiloxane propylene glycol solution and modified siloxane cyclohexanone solution;
the dispersant is an acidic dispersant, preferably at least one of polycarboxylic acid alkyl ammonium salt, polycarboxylic acid and amide polygum salt, unsaturated fatty acid alkyl ammonium salt, polyurethane solution, unsaturated polyamine amide and carboxyl-containing polyester salt.
9. The preparation method according to claim 1, wherein the solid powder is at least one of heavy calcium, talc, light calcium, quartz powder, calcium oxide and kaolin, and the particle sizes of the heavy calcium, the talc, the light calcium, the quartz powder, the calcium oxide and the kaolin are at least one of 600 meshes, 800 meshes and 1250 meshes respectively and independently;
the solvent oil is at least one of 100#, 150#, and 200# solvent oils;
the isocyanate is at least one of MDI-50, MDI-100, TDI80 and TDI 65;
the catalyst is at least one of DMDEE, organotin, zinc isooctanoate and lead isooctanoate;
the latent curing agent is an imine and/or oxazolidine;
the leveling agent is at least one of polydimethylsiloxane, polymethylphenylsiloxane, polyether polyester modified organic siloxane and alkyl modified organic siloxane.
10. The waterproof coating material produced by the production method according to any one of claims 1 to 9.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111548720A (en) * | 2020-06-11 | 2020-08-18 | 三棵树涂料股份有限公司 | Bio-based single-component polyurethane waterproof coating and preparation method thereof |
| CN111592821A (en) * | 2020-06-22 | 2020-08-28 | 安徽三棵树涂料有限公司 | Odorless polyurethane waterproof coating and preparation method thereof |
| CN111647347A (en) * | 2020-06-22 | 2020-09-11 | 安徽三棵树涂料有限公司 | Low free TDI (toluene diisocynate) single-component polyurethane waterproof paint and preparation method thereof |
| CN112500778A (en) * | 2020-12-10 | 2021-03-16 | 株洲飞鹿高新材料技术股份有限公司 | Environment-friendly one-component polyurethane coating and preparation method thereof |
| CN113372804A (en) * | 2021-05-27 | 2021-09-10 | 锦绣防水科技有限公司 | Single-component polyurethane waterproof paint capable of forming film once and preparation method thereof |
| CN113444440A (en) * | 2021-07-22 | 2021-09-28 | 福建省三棵树新材料有限公司 | Single-component polyurethane waterproof coating and preparation method thereof |
| CN113502121A (en) * | 2021-08-02 | 2021-10-15 | 福建省三棵树新材料有限公司 | Palm oil-based plasticizer latent curing type single-component polyurethane waterproof coating and preparation method thereof |
| CN113652159A (en) * | 2021-07-29 | 2021-11-16 | 南通科顺建筑新材料有限公司 | Epoxy resin modified polyurethane waterproof coating and preparation method and application thereof |
| CN114085605A (en) * | 2021-12-21 | 2022-02-25 | 上海东大化学有限公司 | High-storage-stability anti-settling type single-component polyurethane waterproof coating and preparation method thereof |
| CN114634754A (en) * | 2022-03-18 | 2022-06-17 | 河南东方雨虹建筑材料有限公司 | Silane modified single-component polyurethane waterproof coating and preparation method thereof |
| CN115595058A (en) * | 2022-10-28 | 2023-01-13 | 广西神宇新材料有限公司（Cn） | Quick-drying moisture-curing single-component polyurethane waterproof coating and preparation method thereof |
| CN116042069A (en) * | 2022-11-03 | 2023-05-02 | 中建工程产业技术研究院有限公司 | Single-component polyurea waterproof coating with refrigeration function and preparation method thereof |
| CN116082948A (en) * | 2022-12-30 | 2023-05-09 | 四川省飞翎防水科技有限公司 | Production process and performance detection method of polyurethane waterproof coating |
| CN116239947A (en) * | 2022-12-09 | 2023-06-09 | 株洲飞鹿高新材料技术股份有限公司 | Single-component polyurethane coating and preparation method thereof |
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Cited By (15)
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| CN111548720A (en) * | 2020-06-11 | 2020-08-18 | 三棵树涂料股份有限公司 | Bio-based single-component polyurethane waterproof coating and preparation method thereof |
| CN111647347B (en) * | 2020-06-22 | 2023-10-31 | 安徽三棵树涂料有限公司 | Low free TDI single-component polyurethane waterproof coating and preparation method thereof |
| CN111592821A (en) * | 2020-06-22 | 2020-08-28 | 安徽三棵树涂料有限公司 | Odorless polyurethane waterproof coating and preparation method thereof |
| CN111647347A (en) * | 2020-06-22 | 2020-09-11 | 安徽三棵树涂料有限公司 | Low free TDI (toluene diisocynate) single-component polyurethane waterproof paint and preparation method thereof |
| CN112500778A (en) * | 2020-12-10 | 2021-03-16 | 株洲飞鹿高新材料技术股份有限公司 | Environment-friendly one-component polyurethane coating and preparation method thereof |
| CN113372804A (en) * | 2021-05-27 | 2021-09-10 | 锦绣防水科技有限公司 | Single-component polyurethane waterproof paint capable of forming film once and preparation method thereof |
| CN113444440A (en) * | 2021-07-22 | 2021-09-28 | 福建省三棵树新材料有限公司 | Single-component polyurethane waterproof coating and preparation method thereof |
| CN113652159A (en) * | 2021-07-29 | 2021-11-16 | 南通科顺建筑新材料有限公司 | Epoxy resin modified polyurethane waterproof coating and preparation method and application thereof |
| CN113502121A (en) * | 2021-08-02 | 2021-10-15 | 福建省三棵树新材料有限公司 | Palm oil-based plasticizer latent curing type single-component polyurethane waterproof coating and preparation method thereof |
| CN114085605A (en) * | 2021-12-21 | 2022-02-25 | 上海东大化学有限公司 | High-storage-stability anti-settling type single-component polyurethane waterproof coating and preparation method thereof |
| CN114634754A (en) * | 2022-03-18 | 2022-06-17 | 河南东方雨虹建筑材料有限公司 | Silane modified single-component polyurethane waterproof coating and preparation method thereof |
| CN115595058A (en) * | 2022-10-28 | 2023-01-13 | 广西神宇新材料有限公司（Cn） | Quick-drying moisture-curing single-component polyurethane waterproof coating and preparation method thereof |
| CN116042069A (en) * | 2022-11-03 | 2023-05-02 | 中建工程产业技术研究院有限公司 | Single-component polyurea waterproof coating with refrigeration function and preparation method thereof |
| CN116239947A (en) * | 2022-12-09 | 2023-06-09 | 株洲飞鹿高新材料技术股份有限公司 | Single-component polyurethane coating and preparation method thereof |
| CN116082948A (en) * | 2022-12-30 | 2023-05-09 | 四川省飞翎防水科技有限公司 | Production process and performance detection method of polyurethane waterproof coating |
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