CN112551947A - Dust-free polyurethane mortar and preparation method thereof - Google Patents
Dust-free polyurethane mortar and preparation method thereof Download PDFInfo
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- CN112551947A CN112551947A CN202011494715.9A CN202011494715A CN112551947A CN 112551947 A CN112551947 A CN 112551947A CN 202011494715 A CN202011494715 A CN 202011494715A CN 112551947 A CN112551947 A CN 112551947A
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- dust
- agent
- component
- free polyurethane
- polyurethane mortar
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/18—Polyesters; Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses dust-free polyurethane mortar which is composed of A, B and C, wherein the mass ratio of A, B, C three components is 10-20: 10-20: 70-90; the component A comprises 70-80% of polyol resin, 1-5% of an antibacterial agent, 1-5% of an auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler. The hydroxyl value of the polyether polyol is selected to be 56-116 mgKOH/g, and when the polyether polyol interacts with other substances in the components, the high ductility and the high stain resistance of the polyurethane mortar can be ensured, and the polyurethane mortar also has the characteristics of low shrinkage, wear resistance, chemical corrosion resistance, high strength, high impact strength, good toughness, construction convenience and the like.
Description
Technical Field
The invention relates to the technical field of polyurethane mortar, in particular to dust-free polyurethane mortar and a preparation method thereof.
Background
The polyurethane mortar is an engineering material prepared by adopting a polyurethane waterproof coating to replace cement as a gel material and matching sand, and plays roles of bonding, waterproofing and stress transfer in engineering application. The polyurethane waterproof coating is a reaction curing coating, has rubber elasticity, good ductility and cohesiveness, and strong adaptability of a coating film to deformation of a base layer crack. The polyurethane mortar has the characteristics of waterproof coating, has the advantages of excellent waterproof and anti-seepage performance, good bonding performance, excellent stretching performance, small volume shrinkage and the like as caulking materials compared with cement mortar, and is gradually replacing the cement mortar to be widely applied to industrial buildings. However, the polyurethane mortar contained in the market has generally poor stain resistance, and is not suitable for food processing plants, dairy factories, pharmaceutical production plants and other places requiring high-cleanness environment, and in the prior art, the polyurethane mortar has the difficulty of having excellent ductility and stain resistance.
Therefore, the invention aims to provide the dust-free polyurethane mortar, which has high ductility, high stain resistance, low shrinkage, wear resistance, chemical corrosion resistance, high strength, high impact strength, good toughness, construction convenience and the like.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides dust-free polyurethane mortar, which consists of A, B and C, wherein the mass ratio of the three components A, B, C is 10-20: 10-20: 70-90; the component A comprises 70-80% of polyol resin, 1-5% of an antibacterial agent, 1-5% of an auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
As a preferred embodiment, the polyol resin is polyether polyol.
As a preferable technical scheme, the hydroxyl value of the polyether polyol is 56-116 mgKOH/g.
As a preferable technical scheme, the viscosity of the polyether polyol at 25 ℃ is 140-750 mPa.s.
As a preferable technical scheme, the antibacterial agent is a nano silver solution.
As a preferable technical scheme, the auxiliary agent is at least one of a stain resistant agent, a dispersing agent and a defoaming agent.
As a preferable technical scheme, the isocyanate curing agent is at least one of MDI, HDI, IPDI, TDI, MDI dimer, HDI dimer, MDI trimer, HDI trimer, IPDI trimer and TDI trimer.
As a preferable technical scheme, the filler is at least one of carbon black, light calcium carbonate, heavy calcium carbonate and talcum powder.
As a preferable embodiment, the carbon black is water-soluble carbon black.
The second aspect of the invention also provides a preparation method of the dust-free polyurethane mortar, which comprises the following steps:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and water in the component A at 15-30 ℃, adding the component B, mixing for 1-3 min, slowly adding the component C, and mechanically mixing and stirring for 5-10 min to obtain the dust-free polyurethane mortar.
Advantageous effects
According to the invention, polyether polyol with a certain hydroxyl value is selected to react with isocyanate curing agent, the higher the hydroxyl value of polyether polyol is, the larger the crosslinking density of a paint film is, the larger the crosslinking density is, the more compact the formed mortar is, therefore, the permeability of the mortar against external pollutants is better, namely, the stain resistance of the mortar is stronger, but with the increase of the crosslinking density, the ductility of the mortar has a certain influence. The hydroxyl value of the polyether polyol is selected to be 56-116 mgKOH/g, and when the polyether polyol interacts with other substances in the components, the high ductility and the high stain resistance of the polyurethane mortar can be ensured, and the polyurethane mortar also has the characteristics of low shrinkage, wear resistance, chemical corrosion resistance, high strength, high impact strength, good toughness, construction convenience and the like.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
In order to solve the problems, the first aspect of the invention provides dust-free polyurethane mortar, which consists of A, B and C, wherein the mass ratio of the A, B, C three components is 10-20: 10-20: 70-90; the component A comprises 70-80% of polyol resin, 1-5% of an antibacterial agent, 1-5% of an auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
In some preferred embodiments, the polyol resin is a polyether polyol.
In some more preferred embodiments, the polyether polyol has a hydroxyl value of 56 to 116 mgKOH/g.
In some more preferred embodiments, the polyether polyol has a viscosity of 140 to 750mPa.s at 25 ℃.
In some preferred embodiments, the antimicrobial agent is a nanosilver solution.
In some more preferred embodiments, the content of Ag in the nano silver solution is 1000 to 4000 ppm. PPM: PPM represents the mass of solute contained in one million parts per mass of solution.
In some preferred embodiments, the adjuvant is at least one of a stain resist, a dispersant, a defoamer.
In some more preferred embodiments, the adjuvants are stain resists, dispersants, and defoamers.
In some more preferred embodiments, the mass ratio of the stain resistant agent to the dispersant to the defoaming agent is 3-5: 2-3: 1 to 2.
In some more preferred embodiments, the stain resistant agent is pioneer-E of Dow chemistry
In some more preferred embodiments, the dispersant is one of LP-1050, ACW-4040, DS-425, DS-376, DS-363, DS-360 of KS chemistry.
In some more preferred embodiments, the antifoaming agent is one of PB2001, PB2010, PB2018, PB2020, PB2021, PB2720 of basf antifoaming agents.
In some preferred embodiments, the isocyanate-based curing agent is at least one of MDI, HDI, IPDI, TDI, MDI dimer, HDI dimer, MDI trimer, HDI trimer, IPDI trimer, TDI trimer.
In some more preferred embodiments, the isocyanate-based curing agent is at least one of MDI dimer, HDI dimer, MDI trimer, HDI trimer, IPDI trimer, TDI trimer.
In some more preferred embodiments, the isocyanate-based curing agent is at least one of HDI trimer, IPDI trimer, TDI trimer.
In some more preferred embodiments, the isocyanate-based curing agent is an IPDI trimer.
In some more preferred embodiments, the viscosity (23 ℃) of the IPDI trimer is 600. + -. 200 mPa.s.
In some preferred embodiments, the filler is at least one of carbon black, light calcium carbonate, heavy calcium carbonate, talc.
In some more preferred embodiments, the filler is carbon black, ground calcium carbonate, and talc.
In some more preferred embodiments, the mass ratio of the carbon black, the ground calcium carbonate and the talc is 1: 2-4: 4.
in some preferred embodiments, the carbon black is a water-soluble carbon black.
In some more preferred embodiments, the water-soluble carbon black has an average particle size of 20 to 35 nm.
In some more preferred embodiments, the heavy calcium carbonate has a particle size of 600-800 mesh.
In some more preferred embodiments, the particle size of the talc is 800-1250 mesh.
The second aspect of the invention also provides a preparation method of the dust-free polyurethane mortar, which comprises the following steps:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and water in the component A at 15-30 ℃, adding the component B, mixing for 1-3 min, slowly adding the component C, and mechanically mixing and stirring for 5-10 min to obtain the dust-free polyurethane mortar.
Examples
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples. Unless otherwise specified, all the raw materials in the present invention are commercially available.
Example 1
Example 1 provides a dust-free polyurethane mortar, which consists of A, B and C, wherein the mass ratio of A, B, C three components is 10: 10: 80; wherein, the component A comprises 70 percent of polyol resin, 1 percent of antibacterial agent, 1 percent of auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
The polyol resin is polyether polyol, the hydroxyl value of the polyether polyol is 56-58 mgKOH/g, and the viscosity at 25 ℃ is 300-420 mPa.s (available from Nanjing Jinpu jin Hu chemical Co., Ltd., type: KGF-2000 MD).
The antibacterial agent is a nano silver solution, and the content of Ag in the nano silver solution is 1000ppm (available from Jinda nanotechnology (Xiamen) Co., Ltd., model: JDTKS-001).
The auxiliary agent comprises a stain resistant agent, a dispersing agent and a defoaming agent, and the mass ratio of the stain resistant agent to the dispersing agent to the defoaming agent is 3: 2: 1.
the stain resistant agent is Youguan-E (available from Keyin chemical industry, brand: Dow chemical).
The dispersant was LP-1050 (available from QIAGEN chemical, brand: KS chemical).
The defoamer was PB2001 (available from Kein chemical, Brand: Pasteur).
The isocyanate curing agent is IPDI trimer, and the viscosity (23 ℃) of the IPDI trimer is 600 +/-200 mPa.s (the IPDI trimer can be purchased from Guangzhou Haoya new material science and technology company, the model is Z4470).
The filler is carbon black, heavy calcium carbonate and talcum powder, and the mass ratio of the carbon black to the heavy calcium carbonate to the talcum powder is 1: 2: 4.
the carbon black is water-soluble carbon black, and the average particle size of the water-soluble carbon black is 20nm (available from Jinnan Delan chemical Co., Ltd.).
The ground calcium carbonate had a particle size of 600 mesh (available from the shipcheng mineral processing plant in the lingshou county).
The particle size of the talcum powder is 800-1250 meshes (can be purchased from Guangyi ultra-micro powder Co., Ltd., model: GY 915).
The embodiment also provides a preparation method of the dust-free polyurethane mortar, which comprises the following steps:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and the water in the component A at 15 ℃, adding the component B, mixing for 3min, slowly adding the component C, mechanically mixing and stirring for 10min to obtain the dust-free polyurethane mortar.
Example 2
Example 2 provides a dust-free polyurethane mortar, which consists of A, B and C, wherein the mass ratio of A, B, C three components is 20: 20: 70; wherein, the component A comprises 80 percent of polyol resin, 5 percent of antibacterial agent, 5 percent of auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
The polyol resin is polyether polyol, the hydroxyl value of the polyether polyol is 56-58 mgKOH/g, and the viscosity at 25 ℃ is 500-750 mPa.s (available from Nanjing Jinpu jin Hu chemical Co., Ltd., type: KGF-3000M).
The antibacterial agent is a nano silver solution, and the content of Ag in the nano silver solution is 4000ppm (available from Changzhou gold shield new material science and technology Co., Ltd.).
The auxiliary agent comprises a stain resistant agent, a dispersing agent and a defoaming agent, and the mass ratio of the stain resistant agent to the dispersing agent to the defoaming agent is 5: 3: 2.
the stain resistant agent is Youguan-E (available from Keyin chemical industry, brand: Dow chemical).
The dispersant was ACW-4040 (available from Kay chemical, brand: KS chemical).
The defoamer was PB2010 (available from Kain chemical, Brand: Pasteff).
The isocyanate curing agent is IPDI trimer, and the viscosity (23 ℃) of the IPDI trimer is 600 +/-200 mPa.s (the IPDI trimer can be purchased from Guangzhou Haoya new material science and technology company, the model is Z4470).
The filler is carbon black, heavy calcium carbonate and talcum powder, and the mass ratio of the carbon black to the heavy calcium carbonate to the talcum powder is 1: 4: 4.
the carbon black is water-soluble carbon black, and the average particle size of the water-soluble carbon black is 35nm (available from Jinnan Delan chemical Co., Ltd.).
The ground calcium carbonate had a particle size of 800 mesh (available from the shipcheng mineral processing plant in the lingshou county).
The particle size of the talcum powder is 800-1250 meshes (can be purchased from Guangyi ultra-micro powder Co., Ltd., model: GY 915).
The embodiment also provides a preparation method of the dust-free polyurethane mortar, which comprises the following steps:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and the water in the component A at 30 ℃, adding the component B, mixing for 1min, slowly adding the component C, mechanically mixing and stirring for 5min to obtain the dust-free polyurethane mortar.
Example 3
Example 3 provides a dust-free polyurethane mortar, which consists of A, B and C, wherein the mass ratio of A, B, C three components is 15: 20: 80; wherein, the component A comprises 75 percent of polyol resin, 3 percent of antibacterial agent, 3 percent of auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
The polyol resin is polyether polyol, the hydroxyl value of the polyether polyol is 112-116 mgKOH/g, and the viscosity at 25 ℃ is 140-220 mPa.s (available from Nanjing Jinpu jin Hu chemical Co., Ltd., type: KGF-1000 MD).
The antibacterial agent is a nano silver solution, and the content of Ag in the nano silver solution is 4000ppm (available from Changzhou gold shield new material science and technology Co., Ltd.).
The auxiliary agent comprises a stain resistant agent, a dispersing agent and a defoaming agent, and the mass ratio of the stain resistant agent to the dispersing agent to the defoaming agent is 4: 2.5: 1.5.
the stain resistant agent is Youguan-E (available from Keyin chemical industry, brand: Dow chemical).
The dispersant was DS-425 (available from QIAGEN chemical, brand: KS chemical).
The antifoaming agent is PB2018 (available from Kein chemical, Brand: Pasteur).
The isocyanate curing agent is IPDI trimer, and the viscosity (23 ℃) of the IPDI trimer is 600 +/-200 mPa.s (the IPDI trimer can be purchased from Guangzhou Haoya new material science and technology company, the model is Z4470).
The filler is carbon black, heavy calcium carbonate and talcum powder, and the mass ratio of the carbon black to the heavy calcium carbonate to the talcum powder is 1: 3: 4.
the carbon black is water-soluble carbon black, and the average particle size of the water-soluble carbon black is 30nm (available from Jinnan Delan chemical Co., Ltd.).
The ground calcium carbonate had a particle size of 800 mesh (available from the shipcheng mineral processing plant in the lingshou county).
The particle size of the talcum powder is 800-1250 meshes (can be purchased from Guangyi ultra-micro powder Co., Ltd., model: GY 915).
The embodiment also provides a preparation method of the dust-free polyurethane mortar, which comprises the following steps:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and the water in the component A at 25 ℃, adding the component B, mixing for 2min, slowly adding the component C, mechanically mixing and stirring for 8min to obtain the dust-free polyurethane mortar.
Comparative example 1
The hydroxyl value of the polyether polyol is changed to 28-30mgKOH/g, the viscosity at 25 ℃ is 850-1350 mPa.s (available from Nanjing Jinpu Jinhui chemical Co., Ltd., model: KGF-6020), and the rest is the same as in example 3.
Comparative example 2
The antibacterial agent in the component A is removed, and comprises 75 percent of polyol resin, 3 percent of auxiliary agent and the balance of water by mass percent, and the rest is the same as the example 3.
Comparative example 3
Removing a stain-resistant agent in an auxiliary agent, wherein the auxiliary agent is a dispersing agent and a defoaming agent, and the mass ratio of the dispersing agent to the defoaming agent is 2.5: 1.5, as in example 3.
Comparative example 4
Removing carbon black in a filler, wherein the filler is heavy calcium carbonate and talcum powder, and the mass ratio of the heavy calcium carbonate to the talcum powder is 3: 4 as in example 3.
Comparative example 5
Removing heavy calcium carbonate in a filler, wherein the filler is carbon black and talcum powder, and the mass ratio of the carbon black to the talcum powder is 1: 4 as in example 3.
Comparative example 6
Removing talcum powder in a filler, wherein the filler is carbon black and ground limestone, and the mass ratio of the carbon black to the ground limestone is 1: 3, the rest of the procedure was the same as in example 3.
Comparative example 7
The particle size of talc powder was changed to 3500 mesh (available from Guangyi ultra Fine powder Co., Ltd., model: GY935), and the rest was the same as in example 3.
Performance testing
1. 24h compressive strength: the test was carried out according to the GB/T17671 standard, see Table 1.
2. 7 day tensile bond strength (concrete base): the test was carried out according to the standard GB/T22374-2008, see Table 1.
3. Breaking strength: the test was carried out according to JC/T2327-2015 standard, see Table 1 for details.
TABLE 1
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The dust-free polyurethane mortar is characterized by consisting of A, B and C, wherein the mass ratio of the A, B, C three components is 10-20: 10-20: 70-90; the component A comprises 70-80% of polyol resin, 1-5% of an antibacterial agent, 1-5% of an auxiliary agent and the balance of water by mass percentage; the component B is isocyanate curing agent; the component C is a filler.
2. A dust-free polyurethane mortar as claimed in claim 1, wherein the polyol resin is a polyether polyol.
3. A dust-free polyurethane mortar as claimed in claim 2, wherein the polyether polyol has a hydroxyl value of 56 to 116 mgKOH/g.
4. A dust-free polyurethane mortar as claimed in claim 3, wherein the polyether polyol has a viscosity of 140 to 750mPa.s at 25 ℃.
5. The dust-free polyurethane mortar of claim 1, wherein the antimicrobial agent is a nano silver solution.
6. The dust-free polyurethane mortar of claim 1, wherein the auxiliary agent is at least one of a stain resistant agent, a dispersant, and a defoamer.
7. The dust-free polyurethane mortar of claim 1, wherein the isocyanate-based curing agent is at least one of MDI, HDI, IPDI, TDI, MDI dimer, HDI dimer, MDI trimer, HDI trimer, IPDI trimer, TDI trimer.
8. The dust-free polyurethane mortar of claim 1, wherein the filler is at least one of carbon black, light calcium carbonate, heavy calcium carbonate, and talc.
9. A dust-free polyurethane mortar as claimed in claim 7, wherein the carbon black is a water-soluble carbon black.
10. A process for the preparation of a dust-free polyurethane mortar according to any one of claims 1 to 9, comprising the steps of:
s1, uniformly mixing the polyol resin, the antibacterial agent, the auxiliary agent and water in the component A at 15-30 ℃, adding the component B, mixing for 1-3 min, slowly adding the component C, and mechanically mixing and stirring for 5-10 min to obtain the dust-free polyurethane mortar.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480930A (en) * | 2021-07-30 | 2021-10-08 | 上海岩皇环保科技有限公司 | UV-resistant polyol polyurethane teak-like self-leveling material and application thereof |
| CN115959881A (en) * | 2022-12-06 | 2023-04-14 | 无边界(苏州)新材料科技有限公司 | Grouting material for reinforcement and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102167544A (en) * | 2010-12-31 | 2011-08-31 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane resin mortar for cement base material repairing |
| US20190144735A1 (en) * | 2017-11-13 | 2019-05-16 | CDI Energy Products, Inc. | Hydrolytically degradable composition |
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2020
- 2020-12-17 CN CN202011494715.9A patent/CN112551947B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167544A (en) * | 2010-12-31 | 2011-08-31 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane resin mortar for cement base material repairing |
| US20190144735A1 (en) * | 2017-11-13 | 2019-05-16 | CDI Energy Products, Inc. | Hydrolytically degradable composition |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480930A (en) * | 2021-07-30 | 2021-10-08 | 上海岩皇环保科技有限公司 | UV-resistant polyol polyurethane teak-like self-leveling material and application thereof |
| CN113480930B (en) * | 2021-07-30 | 2022-03-25 | 上海岩皇环保科技有限公司 | UV-resistant polyol polyurethane teak-like self-leveling material and application thereof |
| CN115959881A (en) * | 2022-12-06 | 2023-04-14 | 无边界(苏州)新材料科技有限公司 | Grouting material for reinforcement and preparation method thereof |
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| CN112551947B (en) | 2021-09-17 |
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