Reinforcing and repairing adhesive for building and preparation method of reinforcing and repairing adhesive

Abstract

The invention relates to the technical field of reinforcing and repairing adhesives, and discloses a reinforcing and repairing adhesive for buildings and a preparation method thereof.The reinforcing and repairing adhesive for the buildings comprises a main agent, a curing agent, filler and a catalyst.The main agent is prepared from, by weight, 30-40 parts of polyurethane resin, 30-40 parts of low-molecular-weight bisphenol A epoxy resin, 30-40 parts of low-molecular-weight bisphenol A epoxy resin, 30-40 parts of low-molecular-weight bisphenol A epoxy resin, 30-40 parts of low-molecular-weight bisphenol A epoxy resin the curing agent is prepared from the following raw materials in parts by weight: 30 to 40 parts of modified amine and 30 to 40 parts of modified polyamide, the filler is prepared from the following raw materials in parts by weight: 10 to 15 parts of wollastonite, 10 to 15 parts of glass beads, 10 to 15 parts of aluminum powder and 10 to 15 parts of calcium carbonate, and the catalyst is prepared from the following raw materials in parts by weight: 12 to 16 parts of polysulfide rubber and 12 to 16 parts of nitrile rubber. The reinforcing and repairing adhesive for the building does not contain volatile, toxic and harmful products, is suitable for being used under the normal-temperature outdoor condition, is high in bonding strength, has good toughness and impact resistance, and improves the wind resistance and shock resistance of the whole building and the bearing capacity of the whole structure.

Description

Technical Field

[0001] The invention relates to the field of reinforcement repair adhesive, in particular to a reinforcement repair adhesive for construction and a preparation method thereof. Background Art

[0002] The seismic reinforcement of building structures and the repair of damaged structures after earthquakes both require advanced reinforcement technologies to improve the repair effect and efficiency. In addition, a large number of existing buildings have failed to meet the requirements due to increased loads, natural disasters, environmental erosion, changes in use, updated design standards, and increased requirements for structural reliability, and they also need to be reinforced in a timely manner. As a result, more and more reinforcement repair adhesives have appeared in people's field of vision.

[0003] However, there are some problems with the prior art. Some reinforcement repair glues have a little stickiness, which leads to poor construction when entering the hole, or flowing when constructing on the back, which not only wastes engineering materials but also affects the construction environment. In addition, some reinforcement repair glues generally have problems such as excessive fillers and insufficient material toughness, resulting in greater brittleness, easy to break, and thus poor reinforcement effect. For this reason, the present application proposes an epoxy resin glue for building crack repair and a preparation method thereof. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The object of the present invention is to provide a building reinforcement repair adhesive and a preparation method thereof to solve the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a reinforcement and repair glue for construction, comprising a main agent, a curing agent, a filler and a catalyst, wherein the main agent comprises the following raw materials in a weight ratio: 30-40 parts of polyurethane resin and 30-40 parts of low molecular weight bisphenol A epoxy resin, the curing agent comprises the following raw materials in a weight ratio: 30-40 parts of modified amine and 30-40 parts of modified polyamide, the filler comprises the following raw materials in a weight ratio: 10-15 parts of wollastonite, 10-15 parts of glass microbeads, 10-15 parts of aluminum powder and 10-15 parts of calcium carbonate, and the catalyst comprises the following raw materials in a weight ratio: 12-16 parts of polysulfide rubber, 12-16 parts of nitrile rubber, 12-16 parts of accelerator, 12-16 parts of antioxidant and 12-16 parts of defoaming agent.

[0008] Preferably, the total mass of the main agent, filler and catalyst and the mass of the curing agent are in a blending ratio of 3:1, and the curing construction is completed within 40 minutes at room temperature.

[0009] Preferably, the main agent can be a mixture of polyurethane resin and low molecular weight bisphenol A epoxy resin or one of them, and the main agent is a silver-grey or grey thixotropic paste.

[0010] Preferably, the curing agent may be a mixture of modified amine and modified polyamide or one of them, and the curing agent is an amber viscous liquid.

[0011] Preferably, the filler can be wollastonite, glass beads, a mixture of aluminum powder and calcium carbonate, or three of them.

[0012] Preferably, the catalyst may be four of a mixture of polysulfide rubber, nitrile rubber, an accelerator, an antioxidant and a defoaming agent.

[0013] Preferably, pigment and anti-ultraviolet agent may be added to the catalyst according to actual needs, and the mass of the pigment and anti-ultraviolet agent is 5% of the total amount of the catalyst.

[0014] A method for preparing a reinforcement repair adhesive for construction, comprising the following steps;

[0015] Step 1: According to the raw material composition of the building reinforcement repair adhesive described above, respectively weigh polyurethane resin and low molecular weight bisphenol A epoxy resin as the main agent, and weigh modified amine and modified polyamide as the curing agent;

[0016] Step 2: Add the main agent and curing agent into a clean and dry plastic bucket respectively, use a portable stirrer to stir the mixture in the plastic bucket for 5 minutes, then add the filler and catalyst at the same time and continue stirring for 15 minutes until all the filler and catalyst are added;

[0017] Step 3: Continue to stir the mixture in the plastic barrel for 5 minutes until the color is uniform, then add the mixture in the plastic barrel into the degassing equipment for vacuum degassing treatment to obtain the reinforcement repair glue for construction.

[0018] Preferably, a temperature sensor is installed on the inner wall of the plastic barrel. When the mixture in the plastic barrel is stirred, as the temperature of the mixture in the plastic barrel increases, the amount of filler and catalyst added to the plastic barrel can be relatively increased.

[0019] Preferably, the mixture in the plastic barrel is subjected to vacuum degassing in a degassing device for 1 hour to 2 hours. Before the vacuum degassing, the inner cavity of the degassing device needs to be kept dry and clean.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The main agent of the building reinforcement repair adhesive prepared in the present invention adopts polyurethane resin and low molecular weight bisphenol A epoxy resin, which has high bonding strength and durability, can effectively bond various materials, and has wide sources, low price, easy processing, small shrinkage rate, and the cured product is non-toxic and tasteless; the curing agent adopts modified amine and modified polyamide, which can play a cross-linking role in the adhesive, so that it changes from liquid to solid, and has good adhesion, so that the building structural adhesive can firmly adhere to various materials, has good weather resistance, and can maintain its The high performance, stability and strength enable it to withstand greater pressure and stress; the fillers include wollastonite, glass beads, aluminum powder and calcium carbonate, which can enhance the mechanical properties and wear resistance of the repair glue, adjust fluidity and viscosity, reduce costs, enhance durability and improve appearance; the catalysts include polysulfide rubber, nitrile rubber, accelerators, antioxidants and defoaming agents, which can significantly increase the curing speed, weather resistance, oil resistance, wear resistance, oxidation resistance and defoaming of the reinforced repair glue, thereby meeting the complex and changeable construction environment and use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the preparation process of a reinforcement repair adhesive for construction of the present invention;

[0023] Figure 2 This is a table diagram of an embodiment of a reinforcement repair adhesive for construction of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 2 The present invention provides a technical solution for reinforcing and repairing adhesive for construction and a preparation method thereof:

[0026] A reinforcement and repair adhesive for construction, comprising a main agent, a curing agent, a filler and a catalyst, characterized in that the main agent comprises the following raw materials in proportion by weight: 30-40 parts of polyurethane resin and 30-40 parts of low molecular weight bisphenol A epoxy resin; the curing agent comprises the following raw materials in proportion by weight: 30-40 parts of modified amine and 30-40 parts of modified polyamide; the filler comprises the following raw materials in proportion by weight: 10-15 parts of wollastonite, 10-15 parts of glass microbeads, 10-15 parts of aluminum powder and 10-15 parts of calcium carbonate; the catalyst comprises the following raw materials in proportion by weight: 12-16 parts of polysulfide rubber, 12-16 parts of nitrile rubber, 12-16 parts of accelerator, 12-16 parts of antioxidant and 12-16 parts of defoaming agent.

[0027] Furthermore, the main agent can be a mixture of polyurethane resin and low molecular weight bisphenol A epoxy resin or one of them, and the main agent is a silver-grey or grey thixotropic paste.

[0028] It should be noted that it has high bonding strength and durability, can effectively bond various materials, has a wide source, low price, easy processing, small shrinkage rate, and the cured product is non-toxic and odorless and can be used healthily.

[0029] Furthermore, the curing agent may be a mixture of modified amine and modified polyamide or one of them, and the curing agent is an amber viscous liquid.

[0030] It should be noted that it has good adhesion, which enables the building structural adhesive to adhere firmly to various materials, has good weather resistance, and can maintain its performance and stability and high strength under various environmental conditions, allowing it to withstand greater pressure and stress.

[0031] Furthermore, the filler may be wollastonite, glass beads, a mixture of aluminum powder and calcium carbonate, or three of them.

[0032] It should be noted that wollastonite and calcium carbonate as fillers can increase the strength and hardness of the colloid and improve its carrying capacity. Glass microbeads and aluminum powder can enhance the wear resistance of the colloid, making it less likely to be damaged when subjected to friction and wear. Wollastonite and aluminum powder can enhance the durability of the colloid, allowing it to maintain stable performance during long-term use.

[0033] Furthermore, the catalyst may be four of a mixture of polysulfide rubber, nitrile rubber, an accelerator, an antioxidant and a defoaming agent.

[0034] It should be noted that polysulfide rubber provides good elasticity and weather resistance, and enhances the sealing performance and chemical corrosion resistance of the colloid;

[0035] Nitrile rubber improves the oil resistance and wear resistance of the colloid, and enhances the adhesion and impact resistance of the colloid;

[0036] Accelerators are used to accelerate the curing process of colloids, shorten the curing time, improve the curing efficiency, make the colloid reach the use strength faster, and help adjust the curing temperature to adapt to different construction conditions;

[0037] Antioxidants are used to delay the aging process of colloids, extend their service life, protect them from oxidative damage, maintain stable performance, and reduce the adverse effects of environmental factors (such as ultraviolet rays and oxygen) on colloids.

[0038] Defoaming agents can effectively eliminate bubbles in the colloid, improve the density and appearance quality of the colloid, prevent the generation of bubbles during the construction process, ensure that the bonding surface is smooth and free of defects, and help improve the overall performance and durability of the colloid.

[0039] Furthermore, pigments and anti-ultraviolet agents may be added to the catalyst according to actual needs, and the mass of the pigments and anti-ultraviolet agents is 5% of the total amount of the catalyst.

[0040] Embodiment 1:

[0041] A method for preparing a reinforcement repair adhesive for construction, comprising the following steps;

[0042] Prepare materials: prepare a main agent, a curing agent, a filler and a catalyst for standby use, the main agent includes the following raw materials in weight proportion: 30 parts of polyurethane resin, 30 parts of low molecular weight bisphenol A epoxy resin, the curing agent includes the following raw materials in weight proportion: 25 parts of modified amine, 25 parts of modified polyamide, the filler includes the following raw materials in weight proportion: 12 parts of wollastonite, 12 parts of glass microbeads, 12 parts of aluminum powder, 19 parts of calcium carbonate, the catalyst includes the following raw materials in weight proportion: 12 parts of polysulfide rubber, 12 parts of nitrile rubber, 12 parts of accelerator, 12 parts of antioxidant, 12 parts of defoaming agent;

[0043] Step 1: According to the raw material composition of the above building reinforcement repair glue, respectively weigh polyurethane resin and low molecular weight bisphenol A epoxy resin as the main agent, and weigh modified amine and modified polyamide as the curing agent;

[0044] Step 2: Add the main agent and curing agent into a clean and dry plastic bucket respectively, use a portable stirrer to stir the mixture in the plastic bucket for 5 minutes, then add the filler and catalyst at the same time and continue stirring for 15 minutes until all the filler and catalyst are added;

[0045] Step 3: Continue to stir the mixture in the plastic barrel for 5 minutes until the color is uniform, then add the mixture in the plastic barrel into the degassing equipment for vacuum degassing treatment to obtain the reinforcement repair glue for construction.

[0046] Furthermore, a temperature sensor is installed on the inner wall of the plastic barrel. When the mixture in the plastic barrel is stirred, as the temperature of the mixture in the plastic barrel rises, the amount of filler and catalyst added to the plastic barrel can be relatively increased.

[0047] Furthermore, the mixture in the plastic barrel is subjected to vacuum degassing in the degassing equipment, and the degassing time is 1h-2h. Before the vacuum degassing treatment, it is necessary to ensure that the inner cavity of the degassing equipment needs to be kept dry and clean.

[0048] Embodiment 2:

[0049] A method for preparing a reinforcement repair adhesive for construction, comprising the following steps;

[0050] Prepare materials: prepare a main agent, a curing agent, a filler and a catalyst for standby use, the main agent includes the following raw materials in weight proportion: 35 parts of polyurethane resin, 35 parts of low molecular weight bisphenol A epoxy resin, the curing agent includes the following raw materials in weight proportion: 27 parts of modified amine, 28 parts of modified polyamide, the filler includes the following raw materials in weight proportion: 15 parts of wollastonite, 15 parts of glass microbeads, 15 parts of aluminum powder, 15 parts of calcium carbonate, the catalyst includes the following raw materials in weight proportion: 12 parts of polysulfide rubber, 12 parts of nitrile rubber, 12 parts of accelerator, 12 parts of antioxidant, 12 parts of defoaming agent;

[0051] Step 1: According to the raw material composition of the above building reinforcement repair glue, respectively weigh polyurethane resin and low molecular weight bisphenol A epoxy resin as the main agent, and weigh modified amine and modified polyamide as the curing agent;

[0052] Step 2: Add the main agent and curing agent into a clean and dry plastic bucket respectively, use a portable stirrer to stir the mixture in the plastic bucket for 5 minutes, then add the filler and catalyst at the same time and continue stirring for 15 minutes until all the filler and catalyst are added;

[0053] Step 3: Continue to stir the mixture in the plastic barrel for 5 minutes until the color is uniform, then add the mixture in the plastic barrel into the degassing equipment for vacuum degassing treatment to obtain the reinforcement repair glue for construction.

[0054] Furthermore, a temperature sensor is installed on the inner wall of the plastic barrel. When the mixture in the plastic barrel is stirred, as the temperature of the mixture in the plastic barrel rises, the amount of filler and catalyst added to the plastic barrel can be relatively increased.

[0055] Furthermore, the mixture in the plastic barrel is subjected to vacuum degassing in the degassing equipment, and the degassing time is 1h-2h. Before the vacuum degassing treatment, it is necessary to ensure that the inner cavity of the degassing equipment needs to be kept dry and clean.

[0056] Embodiment three:

[0057] A method for preparing a reinforcement repair adhesive for construction, comprising the following steps;

[0058] Prepare materials: prepare a main agent, a curing agent, a filler and a catalyst for standby use, the main agent includes the following raw materials in weight proportion: 40 parts of polyurethane resin, 40 parts of low molecular weight bisphenol A epoxy resin, the curing agent includes the following raw materials in weight proportion: 37 parts of modified amine, 38 parts of modified polyamide, the filler includes the following raw materials in weight proportion: 16 parts of wollastonite, 17 parts of glass microbeads, 16 parts of aluminum powder, 16 parts of calcium carbonate, the catalyst includes the following raw materials in weight proportion: 16 parts of polysulfide rubber, 16 parts of nitrile rubber, 16 parts of accelerator, 16 parts of antioxidant, 16 parts of defoaming agent;

[0059] Step 1: According to the raw material composition of the above building reinforcement repair glue, respectively weigh polyurethane resin and low molecular weight bisphenol A epoxy resin as the main agent, and weigh modified amine and modified polyamide as the curing agent;

[0060] Step 2: Add the main agent and curing agent into a clean and dry plastic bucket respectively, use a portable stirrer to stir the mixture in the plastic bucket for 5 minutes, then add the filler and catalyst at the same time and continue stirring for 15 minutes until all the filler and catalyst are added;

[0061] Step 3: Continue to stir the mixture in the plastic barrel for 5 minutes until the color is uniform, then add the mixture in the plastic barrel into the degassing equipment for vacuum degassing treatment to obtain the reinforcement repair glue for construction.

[0062] Furthermore, a temperature sensor is installed on the inner wall of the plastic barrel. When the mixture in the plastic barrel is stirred, as the temperature of the mixture in the plastic barrel rises, the amount of filler and catalyst added to the plastic barrel can be relatively increased.

[0063] Furthermore, the mixture in the plastic barrel is subjected to vacuum degassing in the degassing equipment, and the degassing time is 1h-2h. Before the vacuum degassing treatment, it is necessary to ensure that the inner cavity of the degassing equipment needs to be kept dry and clean.

[0064] Experimental analysis:

[0065] The comparative example uses epoxy resin glue commonly used in the market for repairing building cracks. Figure 2It can be seen that the reinforcement repair adhesive prepared in the present invention under the condition that the total mass of the main agent, filler and catalyst and the mass of the curing agent are adjusted in a ratio of 3:1 has the longest service life and the highest tensile strength. The main agent of the reinforcement repair adhesive for construction prepared in the present invention adopts polyurethane resin and low molecular weight bisphenol A epoxy resin, which has high bonding strength and durability, can effectively bond various materials, and has a wide source, low price, easy processing, small shrinkage rate, and the cured product is non-toxic and tasteless; the curing agent adopts modified amine and modified polyamide, which can play a cross-linking role in the adhesive, so that it changes from liquid to solid, and has good adhesion, making the building structural adhesive It can adhere firmly to various materials and has good weather resistance. It can maintain its performance, stability and high strength under various environmental conditions, enabling it to withstand greater pressure and stress. The filler adopts wollastonite, glass beads, aluminum powder and calcium carbonate, which can strengthen the mechanical properties and wear resistance of the repair glue, adjust fluidity and viscosity, reduce costs, enhance durability and improve appearance. The catalyst adopts polysulfide rubber, nitrile rubber, accelerator, antioxidant and defoaming agent, which can increase the curing speed, weather resistance, oil resistance, wear resistance, oxidation resistance and defoaming of the reinforced repair glue, so as to meet the complex and changeable construction environment and use requirements.

[0066] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A reinforcement and repair adhesive for construction, comprising a main agent, a curing agent, a filler and a catalyst, characterized in that: The main agent comprises the following raw materials in weight proportion: 30-40 parts of polyurethane resin and 30-40 parts of low molecular weight bisphenol A epoxy resin; the curing agent comprises the following raw materials in weight proportion: 30-40 parts of modified amine and 30-40 parts of modified polyamide; the filler comprises the following raw materials in weight proportion: 10-15 parts of wollastonite, 10-15 parts of glass microbeads, 10-15 parts of aluminum powder and 10-15 parts of calcium carbonate; the catalyst comprises the following raw materials in weight proportion: 12-16 parts of polysulfide rubber, 12-16 parts of nitrile rubber, 12-16 parts of accelerator, 12-16 parts of antioxidant and 12-16 parts of defoaming agent.

2. A building reinforcement repair adhesive and a preparation method thereof according to claim 1, characterized in that: The total mass of the main agent, filler and catalyst and the mass of the curing agent are adjusted in a ratio of 3:1, and the curing construction is completed within 40 minutes at room temperature.

3. The construction reinforcement repair adhesive and preparation method thereof according to claim 1, characterized in that: The main agent can be a mixture of polyurethane resin and low molecular weight bisphenol A epoxy resin or one of them, and the main agent is a silver gray or gray thixotropic paste.

4. The construction reinforcement repair adhesive and preparation method thereof according to claim 1, characterized in that: The curing agent can be a mixture of modified amine and modified polyamide or one of them, and the curing agent is an amber viscous liquid.

5. The construction reinforcement repair adhesive and preparation method thereof according to claim 1, characterized in that: The filler can be wollastonite, glass microspheres, a mixture of aluminum powder and calcium carbonate, or three of them.

6. The construction reinforcement repair adhesive and preparation method thereof according to claim 1, characterized in that: The catalyst can be four of a mixture of polysulfide rubber, nitrile rubber, an accelerator, an antioxidant and a defoaming agent.

7. The construction reinforcement repair adhesive and preparation method thereof according to claim 1, characterized in that: Pigments and anti-ultraviolet agents may also be added to the catalyst according to actual needs, and the mass of the pigments and anti-ultraviolet agents is 5% of the total mass of the catalyst.

8. A method for preparing the building reinforcement repair adhesive according to claim 1, characterized in that: The method comprises the following steps: Step 1: According to the raw material composition of the building reinforcement repair adhesive described above, respectively weigh polyurethane resin and low molecular weight bisphenol A epoxy resin as the main agent, and weigh modified amine and modified polyamide as the curing agent; Step 2: Add the main agent and curing agent into a clean and dry plastic bucket respectively, use a portable stirrer to stir the mixture in the plastic bucket for 5 minutes, then add the filler and catalyst at the same time and continue stirring for 15 minutes until all the filler and catalyst are added; Step 3: Continue to stir the mixture in the plastic barrel for 5 minutes until the color is uniform, then add the mixture in the plastic barrel into the degassing equipment for vacuum degassing treatment to obtain the reinforcement repair glue for construction.

9. A method for preparing a reinforcement repair adhesive for construction according to claim 8, characterized in that: A temperature sensor is installed on the inner wall of the plastic barrel. When the mixture in the plastic barrel is stirred, as the temperature of the mixture in the plastic barrel rises, the amount of filler and catalyst added into the plastic barrel can be relatively increased.

10. A method for preparing a reinforcement repair adhesive for construction according to claim 9, characterized in that; The mixture in the plastic barrel is vacuum degassing in the degassing equipment for 1h-2h. Before the vacuum degassing, the inner cavity of the degassing equipment needs to be kept dry and clean.

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