Two-component polyurethane elastic high-adhesion grouting material and preparation method thereof
Through the use of two-component polyurethane elastic high bond grouting material, the problems of high expansion, large water loss and shrinkage, small elasticity, high brittleness and poor bonding in the actual application of polyurethane grouting materials in the prior art are solved, and rapid reaction, compact consolidation, strong bonding and good elastic effects are achieved, enhancing the leakage plugging time and effect.
Patent Information
- Application Number
- CN202411640387.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-25
- Filing Date
- 2024-11-18
- Publication Date
- 2025-03-18
AI Technical Summary
In actual applications, existing polyurethane grouting materials and water-based grouting materials have problems such as high expansion, high water retention rate, large water loss and shrinkage, small elasticity, high brittleness and poor bonding, resulting in waterproofing failure in leak plugging and repair operations.
It provides a two-component polyurethane elastic high bond grouting material. By mixing components A and components B in equal proportions, the synergistic effect of isocyanate with catalyst and curing agent is used to quickly react to form a dense elastic solidified body with good bonding to the wet surface, achieving a fully bonded to the side wall of the crack and completely filled with elastic leakage plugging and waterproofing effect.
It achieves rapid reaction, tight consolidation, strong adhesion and good elastic effects, which can effectively resist the shrinkage of the material after losing solvents and foaming gas, and enhances the leakage plugging time and effect.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of building waterproof materials, relates to materials for repairing cracks in building structures and blocking water, and specifically relates to a two-component polyurethane elastic high-bonding grouting material and a preparation method thereof. Background Art
[0002] For water leakage and seepage caused by building cracks, polyurethane grouting is the most common leak-proof repair material. Polyurethane grouting is a grouting material with leak-proof and waterproofing effects, which is mainly made of excess isocyanate prepolymer made by the reaction of polymer polyol and isocyanate, and other additives are added. When in use, the polyurethane grouting material is poured into the cracks of water leakage through the grouting needle through a high-pressure grouting machine. The polyurethane grouting material can quickly react and foam and solidify when it encounters the leaking water in the cracks. Under the synergistic effect of mechanical injection pressure and reaction foaming volume expansion, it combines and squeezes out the water in the cracks, and then fills the entire crack space, achieving the purpose of immediate water blocking and subsequent waterproofing and leak plugging.
[0003] However, most of the polyurethane grouting materials currently used have many problems, such as: the material reacts quickly to foam and consolidate when it meets water, and only reacts quickly on the surface, and cannot enter the fine cracks to achieve the effect of complete plugging; and most of them have a large foaming ratio (high water content, large foaming rate); the foamed solid body after molding is hard and brittle, and has low deformation capacity; the solid body of the grouting material reacting with water has poor bonding ability with the cracks; after molding, the gas generated by the reaction is lost and the elastic structure shrinks, causing the solid body to separate from the cracks. Due to these reasons, secondary leakage occurs, and multiple grouting cannot solve the leakage problem. In specific use cases, the polyurethane used in most grouting materials is hard after consolidation, and the elastic deformation of the solid body is small. Due to the vibration of the building itself or the vibration of external force, the filling and plugging effect of the cracks is reduced after the solid body is broken, and secondary leakage is inevitable. Often, the effect of a grouting is maintained for a period of time. Subsequent repeated grouting not only causes loss of property, but also causes considerable damage to the building structure.
[0004] There are also some so-called brick-free and water-based grouting materials in the application, but these materials have such disadvantages: Water-based materials rely on water as a medium, so it is difficult to completely plug leaks; The reaction speed is slow, and it is impossible to quickly repair the parts with water pressure; For areas that are subject to dry-wet cycles, the volume of water-based materials cannot be restored to its original state after losing water and the waterproof effect is lost.
[0005] Therefore, there is an urgent need for a grouting plugging material that can quickly plug leaks, has a small volume change rate or basically no change, and has good bonding effect under humid conditions. Summary of the invention
[0006] The invention aims to solve the problem of waterproof failure in plugging and repairing operations caused by the high expansion, high water retention rate, large water loss shrinkage, low elasticity, high brittleness, and poor bonding of both polyurethane grouting materials and water-based grouting materials in the prior art. The first object of the invention is to provide a two-component polyurethane elastic high-bonding grouting material, which is injected into concrete cracks using a double-tube grouting machine, and can react quickly to form a dense elastic consolidation body that is well bonded to the wet surface, so as to achieve full bonding with the crack side wall and complete filling of elastic plugging and waterproofing; the second object of the invention is to provide a preparation method of the two-component polyurethane elastic high-bonding grouting material.
[0007] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a two-component polyurethane elastic high-bonding grouting material, which is formed by mixing component A and component B in equal proportions, wherein the component A includes a specific number of polyether polyols, polyether diols, isocyanates, liquid fillers, diluents and catalysts; the component B includes a specific number of liquid fillers, tackifying resins, curing agents and diluents; the above-mentioned component A and component B are matched according to a volume ratio of 1:1, and the isocyanate-terminated polymer of component A reacts at a very fast speed to form a polyurethane elastomer to plug cracks under the synergistic effect of the catalyst and the curing agent in component B, and the molding speed is solidified and formed within 2 to 3 minutes. In addition, during the reaction process, the isocyanate reaction is combined with the moist crack wall and the tackifying resin, and the two-component polyurethane elastic high-bonding grouting material is combined tightly, so that the two-component polyurethane elastic high-bonding grouting material is fast and effective and maintains the crack plugging effect for a long time.
[0008] The A component comprises the following components in parts by weight: Polyether polyol 20-30 parts Polyether diol 20-40 parts Isocyanate 10-15 parts Liquid filler 20-50 parts 5-10 parts of diluent Catalyst 0.5~1 part The B component comprises the following components in parts by weight: 40-50 parts of liquid filler 5-10 parts of tackifying resin 1-2 parts of curing agent 10-15 parts of diluent The functionality of the polyether polyol is 3.5-4.5, the number average molecular weight is 6000-9000, and the polyether polyol is at least one or two of polyether polyol 480, polyether polyol 460, and polyether polyol 4110.
[0009] The number average molecular weight of the polyether diol is 1000-4000, and the polyether diol is at least one or two of polyether diol 210, polyether diol 220, polyether diol 230 and polyether diol 240.
[0010] The isocyanate is one or both of toluene diisocyanate TDI and xylene methane diisocyanate MDI.
[0011] The liquid filler is at least one or two of dibutyl phthalate, dioctyl phthalate, 52# chlorinated paraffin, white oil and cyclohexane oil.
[0012] The diluent is one or two of dimethyl carbonate, xylene, methyl acetate and butyl acetate.
[0013] The tackifying resin is at least one of polyisobutylene, liquid coumarone and EVA tackifying resin.
[0014] The catalyst is at least one of T-12 dibutyltin dilaurate and T-9 stannous octoate.
[0015] The curing agent is at least one or two of MOCA and polyetheramine; the polyetheramine has a functionality of 2 to 3 and a number average molecular weight of 300 to 5000, and is one of polyetheramine D-230, D400, D2000, T403, and T5000.
[0016] The invention also discloses a preparation method of a two-component polyurethane elastic high-bonding grouting material; The synthesis process of component A is as follows: Add specific portions of polyether polyol, polyether diol and liquid filler into the reactor, raise the temperature while stirring, and dehydrate for 1.5 to 2 hours at a temperature of 110 to 120°C and a negative pressure of -0.09 to -0.1 MPa; after dehydration, lower the temperature to below 70°C, add a specific portion of isocyanate within 10 minutes, and then keep the temperature at 80 to 90°C and react for 2 to 3 hours; lower the temperature to 60°C, add a specific portion of catalyst and diluent, continue stirring for 0.5 hours, and then fill, seal and store; The synthesis process of component B is as follows: Add specific fractions of liquid filler and tackifying resin into the reactor, increase the temperature and stir, and dehydrate for 1.5 to 2 hours at a temperature of 110 to 120°C and a negative pressure of -0.095 to -0.1MPa. After dehydration, lower the temperature to below 50°C, add specific portions of curing agent and diluent, continue stirring for 0.5 hours, and then fill, seal and store.
[0017] The dehydration temperature of the two components is 110-120°C. The dehydration negative pressure is -0.095~-0.1MPa, The dehydration time is 1.5 to 2 hours, for example 1.5 hours, 2 hours; The reaction temperature of component A is 80-90°C, such as 80°C, 82°C, 84°C, 86°C, 88°C or 90°C; The reaction time of component A is 2 to 3 hours, such as 2 hours, 2.5 hours or 3 hours; By adopting the above technology, compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention changes the curing mode of the polyurethane grouting material from a foaming reaction upon contact with water to a rapid reaction molding mode of a curing agent. The solidified body of the material reaction is no longer a very low-strength material with a large water content that has foamed at a high rate, which improves the compactness of the solidified body and can resist the shrinkage of the material after losing the solvent and foaming gas. The effect of the material not shrinking after the grouting is completed can enhance the plugging time and effect.
[0018] (2) The present invention changes the reaction molding mechanism and elastic effect of the material through a two-component reaction molding curing method. The original single-component grouting material relies on water for expansion and molding. When it reacts with water, to a certain extent, the reaction structure will be inconsistent due to the amount of water, and the softness and hardness of the material will be different under each use condition. The reaction consolidation method has already determined the elastic effect of the main material cross-linking structure during the production process of component A. The rapid reaction with the curing agent of component B only determines the effect of material consolidation. This makes the grouting material of the present invention have a uniform elastic effect under various use conditions.
[0019] (3) The present invention enhances the wet bonding effect of the polyurethane grouting material on the cracks by adding bonding materials. In addition to the bonding effect of the elastic consolidation body on the cracks, the bonding effect on the wet interface is enhanced.
[0020] (4) The two-component polyurethane elastic grouting material provided by the present invention includes component A and component B, wherein the component A includes a specific number of polyether polyols, polyether diols, liquid fillers, a combination of diluents and catalysts; and the component B includes a specific number of liquid fillers, a tackifying resin, a diluent and a curing agent. The above-mentioned component A and component B are matched in a ratio of 1:1, and mixed and grouted by a two-component grouting device. The two components are mixed and quickly solidified and formed. The forming speed is within 2 to 3 minutes, and the forming elasticity effect is good and the dense solidified body with strong bonding force is formed.
[0021] The two-component polyurethane elastic high-bonding grouting material of the present invention is constructed using a double-tube grouting machine. The A and B components of the two-component polyurethane elastic high-bonding grouting material are added to two use tanks respectively. When in use, the valves of the two components are opened at the same time. Before grouting is completed, the valve of the B component is closed, and a section of the A component material is passed to ensure that the mixing head and the grouting port are not solidified and cannot be used further. DETAILED DESCRIPTION
[0022] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. Example 1
[0023] A two-component polyurethane elastic high-bonding polyurethane grouting material is made of the following components and weight components: Component A: Polyether 460 25 Polyether 210 20 TDI 11 52# Chlorinated paraffin 35 Methyl acetate 8.5 T-12 0.5 Component B: Naphthenic oil 4006 45 Polyisobutylene 2400 5 Liquid Coumaron 5 MOCA 0.5 Polyetheramine D2000 1.5 Methyl acetate 15 The preparation method of component A includes: Add polyether 460, polyether 210 and 52# chlorinated paraffin into the reactor, stir and heat, 115℃, -0.095MPa negative pressure, and dehydrate for 2h; Lower the temperature to below 70°C, add TDI to the material within 10 minutes, maintain the reaction temperature at 85°C, and react for 2.5 hours; Lower the temperature to below 60°C, add methyl acetate and T-12, continue to cool and stir for 0.5h to obtain component A; The preparation method of component B includes: 1) Add cyclohexane oil 4006, polyisobutylene 2400 and liquid coumarone into the reactor, stir and heat, and dehydrate for 1 hour at 115℃ and -0.095MPa negative pressure; 2) Lower the temperature to below 50°C, add polyetheramine D2000 and methyl acetate, continue to cool and stir for 0.5h to obtain component B; The two-component polyurethane elastic high-bonding grouting material prepared in this embodiment includes component A: component B in a usage ratio of 1:1. Example 2
[0024] A two-component polyurethane elastic high-bonding polyurethane grouting material is made of the following components and weight components: Component A: Polyether 480 30 Polyether 220 35 TDI 7 MDI 6 Dibutyl phthalate 30 Xylene 8.5 T-9 0.5 Component B: White oil 40 Polyisobutylene 1300 5 Polyetheramine D230 1 Xylene 15 The preparation method of component A includes: Add polyether 480, polyether 220 and dibutyl phthalate into the reactor, stir and heat to 118°C, under negative pressure of -0.098MPa, and dehydrate for 1.5h; Lower the temperature to below 70°C, add the mixture of TDI and MDI to the material dropwise within 10 minutes, maintain the reaction temperature at 87°C, and react for 3 hours; Lower the temperature to below 60°C, add xylene and T-9, continue to cool and stir for 0.5h to obtain component A; The preparation method of component B includes: 1) Add white oil and polyisobutylene 1300 into the reactor, stir and heat, 120℃, -0.098MPa negative pressure, and dehydrate for 1h; 2) Lower the temperature to below 50°C, add polyetheramine D230 and xylene, and continue to cool and stir for 0.5h to obtain component B; The two-component polyurethane elastic high-bonding grouting material prepared in this embodiment includes component A: component B in a usage ratio of 1:1. Example 3
[0025] A two-component polyurethane elastic high-bonding polyurethane grouting material is made of the following components and weight components: Component A: Polyether 460 30 Polyether 240 40 TDI 2 MDI 10 Dioctyl phthalate 40 Butyl acetate 10 T-12 0.7 Component B: Dioctyl phthalate 40 EVA value 150 2 Liquid Gumalon 3 Polyetheramine D400 0.5 Butyl acetate 15 The preparation method of component A includes: Add polyether 460, polyether 240 and dioctyl phthalate into the reactor, stir and heat to 115°C, under negative pressure of -0.098MPa, and dehydrate for 2h; Lower the temperature to below 70°C, add the mixture of TDI and MDI to the material dropwise within 10 minutes, maintain the reaction temperature at 89°C, and react for 2.5 hours; Lower the temperature to below 50°C, add butyl acetate and T-12, continue to cool and stir for 0.5h to obtain component A; The preparation method of component B includes: 1) Add dioctyl phthalate, EVA value 150, and liquid coumarone into the reactor, stir and heat, 115℃, -0.098MPa negative pressure, and dehydrate for 1h; 2) Lower the temperature to below 50°C, add polyetheramine D400 and butyl acetate, and continue to cool and stir for 0.5h to obtain component B; The two-component polyurethane elastic high-bonding grouting material prepared in this embodiment includes component A: component B in a usage ratio of 1:1.
[0026] Performance Test:
[0027] (1) Viscosity: According to the test standard of GB / T 2794-2013, the viscosity is measured using a DV2T viscometer within a torque range of 20 to 75. (2) Consolidation time: The two components are mixed in a ratio of 1:1. According to JC / T 2041-2010, 7.6 Gel time, the consolidation time is from the mixing of the two components to the time when the glass rod leaves the liquid surface and the wire drawing phenomenon stops; (3) Foaming rate: according to JC / T 2041-2010 7.11.2 OPU test; (4) Elongation at break: Tested in accordance with GB / T 528-2009; two components mixed and applied, sample thickness 1.5 mm, surface flat, smooth, and pollution-free, tested at 25°C, cured for 7 days before cutting standard specimens with a Type I dumbbell knife, tensile rate (500±50) mm / min; (5) Wet surface bonding strength: Tested according to method B of GB / T 16777-2008. After the two-component grouting material is mixed evenly, it is applied to the "8"-shaped cement mortar block interface that has been soaked in water for 24 hours and then wiped dry. The thickness of the grouting material shall not exceed 0.5 mm. The bonding strength tensile speed shall be (5±1) mm / min. The two-component polyurethane elastic strong bonding grouting material provided in Examples 1 to 3 was tested according to the above test method. The test results are shown in Table 1: Table 1 Performance test results of two-component polyurethane elastic strong bonding grouting materials provided in Examples 1 to 3
[0028] According to the data in Table 1, we can see that: The two-component polyurethane elastic strong bonding grouting material provided by the invention has the characteristics of low viscosity, fast solidification speed, low foaming rate, good elasticity and strong bonding force in a humid environment, and is a polyurethane grouting material with good plugging effect.
[0029] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A two-component polyurethane elastic high-bonding grouting material, characterized in that: The composition is formed by mixing component A and component B in equal proportions. Component A includes specific portions of polyether polyol, polyether diol, isocyanate, liquid filler, diluent and catalyst; and component B includes specific portions of liquid filler, tackifying resin, curing agent and diluent.
2. A two-component polyurethane elastic high-bonding grouting material according to claim 1, characterized in that: The A component comprises the following components in parts by weight: Polyether polyol 20-30 parts Polyether diol 20-40 parts Isocyanate 10-15 parts Liquid filler 20-50 parts 5-10 parts of diluent 0.5-1 part of catalyst; The B component comprises the following components in parts by weight: 40-50 parts of liquid filler 5-10 parts of tackifying resin 1-2 parts of curing agent 10 to 15 parts of diluent.
3. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The functionality of the polyether polyol is 3.5-4.5, the number average molecular weight is 6000-9000, and the polyether polyol is at least one or two of polyether polyol 480, polyether polyol 460, and polyether polyol 4110.
4. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The number average molecular weight of the polyether diol is 1000-4000, and the polyether diol is at least one or two of polyether diol 210, polyether diol 220, polyether diol 230 and polyether diol 240.
5. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The isocyanate is one or both of toluene diisocyanate TDI and xylene methane diisocyanate MDI.
6. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The liquid filler is at least one or two of dibutyl phthalate, dioctyl phthalate, 52# chlorinated paraffin, white oil, and cyclohexane oil; the diluent is one or two of dimethyl carbonate, xylene, methyl acetate, and butyl acetate.
7. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The catalyst is at least one of T-12 dibutyltin dilaurate and T-9 stannous octoate.
8. A two-component polyurethane elastic high-bonding grouting material according to claim 2, characterized in that: The tackifying resin is at least one of polyisobutylene, liquid coumarone and EVA tackifying resin; the curing agent is at least one or two of MOCA and polyetheramine; the polyetheramine has a functionality of 2 to 3 and a number average molecular weight of 300 to 5000, and is one of polyetheramine D-230, D400, D2000, T403 and T5000.
9. A method for preparing a two-component polyurethane elastic high-bonding grouting material according to any one of claims 1 to 8, characterized in that: It is formed by mixing component A and component B in equal proportions. The synthesis process of component A is as follows: Add specific portions of polyether polyol, polyether diol and liquid filler into the reactor, raise the temperature while stirring, and dehydrate under certain temperature and negative pressure conditions; after dehydration, lower the temperature to below 70°C, add specific portions of isocyanate within 10 minutes, and then keep the temperature at 80-90°C for 2-3 hours; lower the temperature to 60°C, add specific portions of catalyst and diluent, continue stirring for 0.5 hours, and then fill, seal and store; The synthesis process of the B component is as follows: Add specific fractions of liquid filler and tackifying resin into the reactor, increase the temperature and stir, and dehydrate under certain temperature and negative pressure conditions; after dehydration, lower the temperature to below 50°C, add specific fractions of curing agent and diluent, continue stirring for 0.5h, and then fill, seal and store.
10. The method for preparing the two-component polyurethane elastic high-bonding grouting material according to claim 9, characterized in that: The dehydration conditions during the synthesis of component A and component B are: dehydration for 1.5 to 2 hours at a temperature of 110 to 120°C and a negative pressure of -0.09 to -0.1 MPa.