CN112574663A - Environment-friendly weather-resistant modified single-component polyurethane waterproof coating and preparation method thereof - Google Patents
Environment-friendly weather-resistant modified single-component polyurethane waterproof coating and preparation method thereof Download PDFInfo
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- CN112574663A CN112574663A CN202011412229.8A CN202011412229A CN112574663A CN 112574663 A CN112574663 A CN 112574663A CN 202011412229 A CN202011412229 A CN 202011412229A CN 112574663 A CN112574663 A CN 112574663A
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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
- 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
- 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
- C09D7/63—Additives non-macromolecular organic
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention discloses an environment-friendly weather-resistant modified single-component polyurethane waterproof coating and a preparation method thereof, and the coating is mainly prepared from the following raw materials: 100 parts of modified polyurethane resin, 5-10 parts of plasticizer, 1-5 parts of coupling agent, 1-10 parts of crosslinking agent, 0-150 parts of filler and 0.001-0.01 part of catalyst. The preparation method of the polyurethane waterproof coating comprises the following specific steps: (1) preparing the modified polyurethane resin: mixing polyether polyol and polyether amine according to the proportion of 0.5-2 of the amount of the substance, and carrying out vacuum dehydration for 2h at the temperature of 100 ℃ and 120 ℃ until the water content is less than 0.05 percent; adding isocyanate group alkoxy silane into the prepared hydroxyl polymer to carry out end capping reaction, carrying out reaction at the temperature of not higher than 85 ℃, and determining that no hydroxyl exists in the product to obtain the product. (2) Mixing the above raw materials, stirring, reacting, discharging, packaging, and sealing. The prepared modified single-component polyurethane waterproof coating has good weather resistance, does not contain free isocyanate groups, and is environment-friendly.
Description
Technical Field
The invention belongs to the field of high polymer coatings, and particularly relates to a preparation technology of a modified polyurethane coating, which is mainly used in the field of exposed concrete building surface waterproof protection.
Background
The polyurethane waterproof coating has excellent cohesiveness and adjustable flexibility, and is widely applied to waterproof protection of concrete. The polyurethane coating can be divided into a multi-component coating and a single-component coating, wherein the multi-component coating has construction inconvenience, the multi-component coating needs to be stirred uniformly according to a strict proportion before construction, otherwise the actual protection effect is seriously influenced, certain operation time exists after the multi-component stirring, the coating needs to be used within the time, and otherwise the coating can not be constructed due to curing; although the single-component polyurethane coating can be used after being opened, has the advantages of simple operation and convenient construction, carbon dioxide gas is generated when the isocyanate group reacts with water vapor, so that the mechanical property of the single-component polyurethane coating is influenced; the common polyurethane waterproof coating has poor weather resistance and is not suitable for being applied outdoors, and the single-component weather-resistant polyurethane protective coating prepared by adopting aliphatic isocyanate (such as an HDI system) has higher cost and less application; the polyurethane waterproof coating contains isocyanate groups, and when the content of the isocyanate groups is excessive, the polyurethane waterproof coating can affect human health.
Disclosure of Invention
In order to solve the technical problems, the invention develops an environment-friendly weather-resistant single-component modified polyurethane waterproof coating which does not contain isocyanate groups, and the technical scheme provided by the invention is as follows:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
the environment-friendly weather-resistant single-component modified polyurethane waterproof coating disclosed by the invention has good weather resistance, can be used outdoors and has the advantages of simplicity and convenience in operation and high ultraviolet aging tensile strength retention rate compared with a common single-component or multi-component polyurethane waterproof coating, and compared with a common non-exposed polyurethane sealant, the environment-friendly weather-resistant single-component modified polyurethane waterproof coating disclosed by the invention is applicable to outdoor use.
Preferably, the plasticizer is at least one of phthalate ester liquid, aromatic hydrocarbon oil and polyether polyol plasticizer.
Preferably, the coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-aminopropylmethyldiethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, Y-aminopropyltrimethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropylmethyldimethoxysilane. The coupling agent provides bonding strength with a base surface for reaction in the modification and improvement of the composite product.
Preferably, the cross-linking agent is one or more of phenyl tributyl ketoxime silane, methyl tributyl ketoxime silane, tetrabutyl ketoxime silane and ethyl orthosilicate. The cross-linking agent provides cohesive force and improves the cross-linking strength of the product.
Preferably, the filler is calcium carbonate with the average particle size of less than 13 μm, and is baked and dehydrated in advance before being added, so that the water content is controlled to be less than 0.05%.
Preferably, the catalyst is at least one of organic bismuth and organic tin.
As a general technical concept, the invention also provides a preparation method of the modified single-component polyurethane waterproof coating, which comprises the following steps:
(1) mixing and stirring modified polyurethane resin, plasticizer and filler;
(2) adding a catalyst into the step (1), stirring, reacting, discharging, filling and sealing to finish the preparation of the modified single-component polyurethane waterproof coating.
As a preferable aspect of the above technical method, the present invention also provides a method for producing the modified polyurethane resin, comprising:
(1) mixing polyether polyol and polyether amine according to the mass ratio of 0.5-2, and simultaneously heating to 100-120 ℃, vacuumizing and dehydrating for at least 2h, wherein the vacuum degree is less than-0.090 MPa until the water content is less than 0.05% in the test to obtain a hydroxyl polymer; the water can react with isocyanate in the isocyanate-silicon-oxygen silane in the next step, so that effective substances are consumed, and the reduction of the water content is beneficial to improving the preparation efficiency.
(2) Adding isocyanate group alkoxy silane into the prepared hydroxyl polymer to carry out end capping reaction, carrying out reaction at the temperature of not higher than 85 ℃, and determining that no hydroxyl exists in the product to obtain the product. Hydroxyl and isocyanate group react, if the isocyanate group is excessive, the hydroxyl can be completely reacted, and if the hydroxyl is not contained, the reaction is finished, and the obtained product does not contain the isocyanate group, is non-toxic and harmless and is beneficial to human health.
Preferably, in the above-mentioned method, the polyether polyol has a hydroxyl value of 25 to 295mgKOH/g, and the polyetheramine has an amine value of 25 to 550 mgKOH/g. The matching selection is carried out according to the molecular weight, the smaller the molecular weight is, the higher the hydroxyl value is, the higher the activity is, the higher the mechanical strength is, the poorer the elasticity is, and the matching reaction effect is the best in the interval of the scheme.
Preferably, the amount of the isocyanatoalkoxysilane is 1 to 1.2 times the amount of the active hydrogen species of the hydroxyl polymer.
Compared with the prior art, the invention has the beneficial effects that:
(1) the environment-friendly weather-resistant single-component modified polyurethane waterproof coating has good weather resistance, and can be used outdoors.
(2) The environment-friendly weather-resistant single-component modified polyurethane waterproof coating is a single-component product, has the characteristics of simple operation and convenient construction, does not generate bubbles in the curing process compared with a single-component polyurethane coating, and has better adhesion with a concrete substrate.
(3) The environment-friendly weather-resistant single-component modified polyurethane waterproof coating does not contain free NCO groups, and is environment-friendly.
(4) The preparation method is completed by adopting a two-step method, wherein the first step is to prepare prepolymer resin; the second part is to add materials such as powder, auxiliary agent and the like; the process is perfect, the quality is controllable, the operability is strong, and the method is suitable for large-scale production.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 10000mPa & s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 2000 parts of polyether amine (Barris D-2000, the amine value is 55mgKOH/g), adding 2400 parts of polyether polyol (EP-330N, Dongdong blue, the hydroxyl value is 35mgKOH/g), uniformly stirring, raising the temperature to 100 ℃ and 120 ℃, vacuumizing and dehydrating for 2h, wherein the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 950 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) dispersing and stirring 100 parts of modified polyurethane resin, 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyltriethoxysilane and 3 parts of ethyl orthosilicate for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and controlling the material temperature to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
Example 2:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 10000mPa & s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 2000 parts of polyether amine (Barris D-2000, the amine value is 55mgKOH/g), adding 2400 parts of polyether polyol (EP-330N, Dongdong blue, the hydroxyl value is 35mgKOH/g), uniformly stirring, raising the temperature to 100 ℃ and 120 ℃, vacuumizing and dehydrating for 2h, wherein the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
(2) and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 950 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) dispersing and stirring 100 parts of modified polyurethane resin, 150 parts of filler (the water content is controlled to be 0.05 percent by baking and dehydrating before adding), 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyl triethoxysilane and 3 parts of tetraethoxysilane for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and controlling the material temperature to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
Example 3:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 6000 mPa.s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 5000 parts of polyether amine (Barris T-5000, the amine value is 30mgKOH/g), adding 325 parts of polyether polyol (Barris tetrahydrofuran polyether PTMEG-650, the hydroxyl value is 172mgKOH/g), uniformly stirring, raising the temperature to 100-120 ℃, vacuumizing and dehydrating for 2h, the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
(2) and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 1038 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) dispersing and stirring 100 parts of modified polyurethane resin, 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyltriethoxysilane and 3 parts of ethyl orthosilicate for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and controlling the material temperature to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
Example 4:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 6000 mPa.s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 5000 parts of polyether amine (Barris T-5000, the amine value is 30mgKOH/g), adding 325 parts of polyether polyol (Barris tetrahydrofuran polyether PTMEG-650, the hydroxyl value is 172mgKOH/g), uniformly stirring, raising the temperature to 100-120 ℃, vacuumizing and dehydrating for 2h, the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
(2) and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 1038 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) dispersing and stirring 100 parts of modified polyurethane resin, 150 parts of filler (the water content is controlled to be 0.05 percent by baking and dehydrating before adding), 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyl triethoxysilane and 3 parts of tetraethoxysilane for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and controlling the material temperature to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
Example 5:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 8000 mPa.s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 230 parts of polyether amine (Barris D-230, the amine value is 480mgKOH/g), adding 6000 parts of polyether polyol (Barris tetrahydrofuran polyether PTMEG-3000, the hydroxyl value is 36mgKOH/g), uniformly stirring, raising the temperature to 100-120 ℃, vacuumizing and dehydrating for 2h, the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
(2) and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 2075 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) dispersing and stirring 100 parts of modified polyurethane resin, 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyltriethoxysilane and 3 parts of ethyl orthosilicate for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and controlling the material temperature to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
Example 6:
an environment-friendly weather-resistant modified single-component polyurethane waterproof coating is mainly prepared from the following raw materials in parts by weight:
wherein the viscosity of the modified polyurethane resin is 8000 mPa.s, and the modified polyurethane resin is prepared by the following preparation method:
(1) selecting 230 parts of polyether amine (Barris D-230, the amine value is 480mgKOH/g), adding 6000 parts of polyether polyol (Barris tetrahydrofuran polyether PTMEG-3000, the hydroxyl value is 36mgKOH/g), uniformly stirring, raising the temperature to 100-120 ℃, vacuumizing and dehydrating for 2h, the vacuum degree is less than-0.090 MPa, and carrying out the next reaction after detecting that the water content of the hydroxyl mixture is less than 0.05%;
(2) and (2) when the temperature of the hydroxyl mixture in the step (1) is reduced to 60 ℃, adding 2075 parts of isocyanate propyl triethoxysilane, keeping the temperature, reacting for 0.5h, heating to 70-85 ℃, reacting for 2h, and detecting that no hydroxyl exists in the polymer to obtain the modified polyurethane resin.
The modified single-component polyurethane waterproof coating of the embodiment is prepared by the following specific steps:
(1) 100 parts of modified polyurethane resin, 150 parts of filler (the water content is controlled to be 0.05 percent by baking and dehydration before adding), 10 parts of dioctyl phthalate, 2 parts of gamma-aminopropyltriethoxysilane, 3 parts of tetraethoxysilane and 0.01 part of pigment are dispersed and stirred for 30 minutes under the condition that the vacuum degree is-0.09 MPa, and the material temperature is controlled to be below 60 ℃;
(2) and (2) adding 0.001 part of dibutyltin dilaurate into the step (1), stirring for 30 minutes under the condition that the vacuum degree is-0.09 MPa, controlling the material temperature below 60 ℃, discharging, filling and sealing to finish the preparation of the environment-friendly weather-resistant single-component modified polyurethane waterproof coating.
The environmental-friendly weather-resistant modified single-component polyurethane waterproof coating prepared in the embodiments 1 to 6, the existing single-component polyurethane waterproof coating on the market and the existing double-component polyurethane waterproof coating on the market are subjected to related performance tests under the same conditions, the test results are shown in table 1, and as can be seen from table 1, the environmental-friendly weather-resistant single-component modified polyurethane coating disclosed by the invention has excellent weather resistance and high retention rate of ultraviolet aging tensile strength.
TABLE 1 relevant Properties of the sealants of the examples and comparative examples
Claims (10)
1. The environment-friendly weather-resistant modified single-component polyurethane waterproof coating is characterized by being mainly prepared from the following raw materials in parts by weight:
2. the modified one-component polyurethane waterproofing coating according to claim 1, wherein the plasticizer is at least one of phthalate ester type liquid, aromatic hydrocarbon oil, polyether polyol plasticizer.
3. The modified one-component polyurethane waterproof coating as claimed in claim 1, wherein the coupling agent is one or more of γ -aminopropyltriethoxysilane, γ -aminopropylmethyldiethoxysilane, γ - (methacryloyloxy) propyltrimethoxysilane, Y-aminopropyltrimethoxysilane, N- (β -aminoethyl) - γ -aminopropyltrimethoxysilane, and N- (β -aminoethyl) - γ -aminopropylmethyldimethoxysilane.
4. The modified mono-component polyurethane waterproof paint as claimed in claim 1, wherein the cross-linking agent is one or more of phenyl tributyl ketoxime silane, methyl tributyl ketoxime silane, tetrabutyl ketoxime silane and ethyl orthosilicate.
5. The modified one-component polyurethane waterproofing paint according to claim 1, wherein the filler is calcium carbonate having an average particle diameter of less than 13 μm, and is previously baked and dehydrated before being added to control the water content to 0.05% or less.
6. The modified one-component polyurethane waterproofing paint according to any of claims 1 to 5, wherein the catalyst is at least one of organic bismuth and organic tin.
7. A preparation method of the modified single-component polyurethane waterproof coating as claimed in any one of claims 1 to 6, comprising the following specific steps:
(1) mixing and stirring modified polyurethane resin, a plasticizer, a coupling agent, a crosslinking agent and a filler;
(2) adding a catalyst into the step (1), stirring, reacting, discharging, filling and sealing to finish the preparation of the modified single-component polyurethane waterproof coating.
8. The method according to claim 7, wherein the method for producing the modified polyurethane resin comprises:
(1) mixing polyether polyol and polyether amine according to the mass ratio of 0.5-2, simultaneously heating to 100-120 ℃, vacuumizing and dehydrating for at least 2h, controlling the vacuum degree to be less than-0.090 MPa and the material temperature to be less than 60 ℃ until the water content is less than 0.05% in a test, and obtaining a hydroxyl polymer;
(2) adding isocyanate group alkoxy silane into the prepared hydroxyl polymer to carry out end capping reaction, carrying out reaction at the temperature of not higher than 85 ℃, and determining that no hydroxyl exists in the product to obtain the product.
9. The process of claim 8, wherein the polyether polyol has a hydroxyl value of from 25 to 295mgKOH/g and the polyetheramine has an amine value of from 25 to 550 mgKOH/g.
10. The method according to claim 8 or 9, wherein the amount of the substance of the isocyanatoalkoxysilane is 1 to 1.2 times the amount of the active hydrogen substance of the hydroxyl polymer.
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| CN113683951A (en) * | 2021-09-07 | 2021-11-23 | 建国伟业防水科技望都有限公司 | Environment-friendly single-component polyurethane coating and preparation method thereof |
| CN114292574A (en) * | 2021-08-13 | 2022-04-08 | 荆门科顺新材料有限公司 | Single-component polyurethane waterproof coating and preparation method thereof |
| CN115093779A (en) * | 2022-06-24 | 2022-09-23 | 广州集泰化工股份有限公司 | Solvent-free transparent waterproof coating and preparation method thereof |
| CN116285641A (en) * | 2023-02-15 | 2023-06-23 | 北京东方雨虹防水技术股份有限公司 | High-performance single-component polyurethane waterproof coating and preparation method thereof |
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| CN116285641A (en) * | 2023-02-15 | 2023-06-23 | 北京东方雨虹防水技术股份有限公司 | High-performance single-component polyurethane waterproof coating and preparation method thereof |
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