CN113861908A - Epoxy resin crack pouring adhesive for repairing cement concrete cracks and preparation method thereof - Google Patents
Epoxy resin crack pouring adhesive for repairing cement concrete cracks and preparation method thereof Download PDFInfo
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- CN113861908A CN113861908A CN202111187739.4A CN202111187739A CN113861908A CN 113861908 A CN113861908 A CN 113861908A CN 202111187739 A CN202111187739 A CN 202111187739A CN 113861908 A CN113861908 A CN 113861908A
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- 239000004568 cement Substances 0.000 title claims abstract description 102
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 54
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 54
- 239000004567 concrete Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 21
- 239000000853 adhesive Substances 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229920005989 resin Polymers 0.000 claims abstract description 68
- 239000011347 resin Substances 0.000 claims abstract description 68
- 239000004005 microsphere Substances 0.000 claims abstract description 67
- 239000000839 emulsion Substances 0.000 claims abstract description 66
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 58
- 239000010703 silicon Substances 0.000 claims abstract description 58
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 52
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- 230000002745 absorbent Effects 0.000 claims abstract description 39
- 239000002250 absorbent Substances 0.000 claims abstract description 39
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004814 polyurethane Substances 0.000 claims abstract description 31
- 229920002635 polyurethane Polymers 0.000 claims abstract description 30
- 239000004593 Epoxy Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 18
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 44
- 239000011162 core material Substances 0.000 claims description 31
- 229920000642 polymer Polymers 0.000 claims description 23
- 239000007787 solid Substances 0.000 claims description 21
- 238000001694 spray drying Methods 0.000 claims description 21
- 229920002050 silicone resin Polymers 0.000 claims description 20
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 125000000129 anionic group Chemical group 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 125000003700 epoxy group Chemical group 0.000 claims description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims description 8
- 102000002067 Protein Subunits Human genes 0.000 claims description 7
- 108010001267 Protein Subunits Proteins 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 7
- -1 acrylic ester Chemical class 0.000 claims description 7
- 125000003368 amide group Chemical group 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000004846 water-soluble epoxy resin Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 229910010272 inorganic material Inorganic materials 0.000 claims description 6
- 239000011147 inorganic material Substances 0.000 claims description 6
- 239000011368 organic material Substances 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 230000008439 repair process Effects 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000565 sealant Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 7
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000011850 water-based material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention belongs to the technical field of cement concrete crack repair, and particularly relates to an epoxy resin crack pouring adhesive for repairing a cement concrete crack and a preparation method thereof. The technical scheme comprises a component A: 20-25 parts of water-based epoxy resin emulsion, 3-5 parts of water-based polyurethane and 2-5 parts of acrylate emulsion; and B component: 20-25 parts of a water-based epoxy curing agent, 1-2 parts of talcum powder, 0.1-0.2 part of a silane coupling agent, 0.1-0.2 part of an ultraviolet absorber, 22-24 parts of superfine cement, 10.7-12.3 parts of self-repairing microspheres, 1.0-1.2 parts of a cement expanding agent and 0.1 part of a defoaming agent, wherein the total amount is 60 parts; and C, component C: 5-10 parts of water; the self-repairing microspheres are composed of super absorbent resin wrapped by silicon resin, superfine cement and a silane coupling agent. The pouring sealant is an organic/inorganic composite crack repairing material with a self-repairing function, which is formed by compounding water-based epoxy resin and superfine cement.
Description
Technical Field
The invention belongs to the technical field of cement concrete crack repair, and relates to an epoxy resin crack pouring adhesive for repairing a cement concrete crack and a preparation method thereof.
Background
The cement concrete consists of stone, sand, hydrate gel and hydrated crystal. The distribution of each component is disordered, and no rule can be said. When concrete is mixed, pores, capillary pores, shrinkage cracks, temperature shrinkage cracks and carbonization shrinkage cracks are generated. In the process of pouring and vibrating the concrete, after slurry at the bottom leaks into the base layer, cement slurry around the aggregate is reduced, and the filling density is reduced. Meanwhile, in the condensation process of cement concrete, more moisture is gathered around the coarse aggregate to form a water film due to the occurrence of bleeding, so that the water film becomes the weakest area of a cement concrete structure and is also a macro-cracking area. Therefore, it can be said that these microcracks of cement concrete become inherent defects of cement concrete structures. The existing microcracks gradually develop under the action of load and environment, and finally, when the microcracks are communicated, macrocracks are formed. Cracks in cement concrete seriously affect the service life of the cement concrete structure. Therefore, research on cement concrete crack repairing materials has been started very early at home and abroad.
The cement concrete crack repairing material mainly comprises three main types, namely, a first type, organic materials, which have the advantages of good toughness and high bonding strength, but the organic resin has larger shrinkage after being cured and has larger difference with the thermal expansion coefficient of cement concrete; the second class is inorganic materials, which have the advantages of high strength, low cost, simple construction and the like, but have poor bonding effect with the fracture surface of the old cement concrete and lower strength; the third category, organic/inorganic composite materials, have high flexural strength and adhesive and tensile strength, and have the major disadvantage of high price. Common organic materials are generally epoxy resin, polyurethane, asphalt, and the like; the common inorganic materials mainly comprise cement, superfine cement and the like.
The epoxy resin material is a polymer crack repairing material which is most used in engineering, comprises epoxy resin, a curing agent and a modifier, and is mainly used for sealing and reinforcing concrete cracks and preventing seepage and stopping leakage. Epoxy resin materials are strong in cohesiveness, flexible and diverse in curing formula design, high in strength and high in cohesive strength after curing, but the epoxy resin materials are large in brittleness and low in elongation, so that structural or performance modification needs to be carried out on the epoxy resin materials.
The bonding strength between the pure cement-based crack repairing material and the repaired surface is not high, and the crack of the material per se exists.
The secondary damage after crack repair is also a non-trivial problem, load and environmental factors still exist, the secondary damage after crack repair can be effectively prevented by adding the self-repairing component into the crack repair material, and the secondary damage after crack repair can be continuously acted on the cement concrete.
Aiming at the advantages and disadvantages of epoxy resin materials and cement materials and the defects of the existing crack repairing materials, the application provides the epoxy resin crack pouring glue for repairing cement concrete cracks and the preparation method thereof.
Disclosure of Invention
The invention aims to provide an epoxy resin crack pouring adhesive for repairing cement concrete cracks, which comprises the following components in parts by weight:
the component A comprises: 20-25 parts of water-based epoxy resin emulsion, 3-5 parts of water-based polyurethane and 2-5 parts of acrylate emulsion;
and B component: 20-25 parts of a water-based epoxy curing agent, 1-2 parts of talcum powder, 0.1-0.2 part of a silane coupling agent, 0.1-0.2 part of an ultraviolet absorber, 22-24 parts of superfine cement, 10.7-12.3 parts of self-repairing microspheres, 1.0-1.2 parts of a cement expanding agent and 0.1 part of a defoaming agent, wherein the total amount is 60 parts;
and C, component C: 5-10 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 4-6 parts of super absorbent resin, 3.9-5.9 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 56-65 parts of methyltrimethoxysilane and 28-39 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 5-7 parts of water within 2 hours, continuing to react for 3 hours, then cooling to normal temperature, wherein methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane are subjected to hydrolysis reaction with water in the process to generate silicon hydroxyl and methanol, and further dehydrating and condensing a part of silicon hydroxyl groups to form low-degree cross-linked silicon resin, namely prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing the self-repairing microsphere core material obtained in the first step into 50-100 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, performing spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, and initially polymerizing in high-temperature and dry airThe water and methanol in the silicone resin are further evaporated, and the silicon hydroxyl groups are further subjected to dehydration condensation to generate water and methanol
The silicone resin with high degree of crosslinking is changed into a cured product, namely the silicone resin, so as to obtain the self-repairing microspheres.
Further, the water-based epoxy resin emulsion is an anionic or nonionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to anionic or nonionic water-based polyurethane with the solid content of 35 +/-1%;
the acrylic ester emulsion is anionic or nonionic emulsion with solid content of 50 +/-1%, and can be any one of pure acrylic emulsion, silicone acrylic emulsion, styrene-acrylic emulsion and vinyl acetate-acrylic emulsion;
the water-based epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the super absorbent resin is a synthetic resin which has hydrophilic groups on molecules, can absorb a large amount of water, swell and keep the water not to flow out, the particle fineness is preferably more than or equal to 100 meshes, the molecular structure of the super absorbent resin is rich in amide groups, and the water absorption rate is 800-1500;
the superfine cement has the required particle fineness of more than or equal to 1500 meshes;
the silane coupling agent is a compound with a special molecular structure, wherein the silane coupling agent has a group capable of being combined with inorganic materials and a group capable of being combined with organic materials;
the defoaming agent is any one of BYK-019 or Tech-365 w;
the ultraviolet absorbent is any one of BYK-3840 or UV-2.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: uniformly stirring 20-25 parts of aqueous epoxy resin emulsion, 5-3 parts of aqueous polyurethane and 5-2 parts of acrylate emulsion to obtain 30 parts in total;
and B component: 20-25 parts of a water-based epoxy curing agent, 2-1 parts of talcum powder, 0.2-0.1 part of a silane coupling agent, 0.2-0.1 part of an ultraviolet absorber, 24-22 parts of superfine cement, 12.3-10.7 parts of self-repairing microspheres, 1.2-1.0 part of a cement expanding agent, 0.1 part of a defoaming agent, 60 parts in total, and uniformly stirring;
and C, component C: 5-10 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.167-0.333, and the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
Advantages and positive effects of the invention
1. The epoxy resin and concrete have higher bonding strength but insufficient toughness, so that the polyurethane and acrylic resin are adopted to toughen and modify the epoxy resin, and the toughness of the epoxy resin is improved. The adhesive property of the composite resin is reduced while the modification is carried out, so that a certain amount of silane coupling agent is added to form coupling between the organic resin and the non-polar concrete, and the adhesive property of the crack pouring material is improved.
2. The water-based epoxy resin is shrunk to a certain extent in the curing process, which is unfavorable for repairing cracks and possibly causes new cracks, so that the talcum powder, the superfine cement and the cement expanding agent are used as fillers of the composite material and are uniformly dispersed in the component B through grinding (the component B does not contain water). A, B two components are mixed evenly when in use, the ultra-fine cement begins to react with water in the component A for solidification, and expands to a certain extent under the action of the cement expanding agent to offset the solidification shrinkage phenomenon of the resin, and meanwhile, the solidification of the ultra-fine cement consumes a part of water, which is beneficial to the promotion of the early strength of the repair material and the shortening of the solidification time.
3. Due to the adoption of a water-based material system, during encapsulation construction, water can be added according to the width and depth of the crack, the field conditions of encapsulation equipment and the like to adjust the viscosity of the crack repairing material, so that the best encapsulation effect is achieved.
4. The main function of the self-repairing microspheres is to provide self-repairing form plugging curing when the crack repair site is cracked again. Under the influence of acting force at the crack, the wall material of the self-repairing microsphere is broken, and the core material is exposed. The super absorbent resin in the core material can firstly absorb air and moisture in the surrounding environment to expand so as to fill cracks; meanwhile, the moisture enriched in the super absorbent resin, air and the moisture in the surrounding environment can also generate hydration reaction with the superfine cement in the core material, so that the expanded super absorbent resin is adhered and cured; the silane coupling agent further enhances the coupling effect between a cement condensate formed by the super absorbent resin (organic matter) and the superfine cement and the concrete (inorganic matter) at the crack; the superfine cement forms the coupling between silicon atoms and concrete at the crack. The three substances interact with each other to fill and repair the cracks of the concrete.
It should be noted that the silane coupling agent is a compound having a specific molecular structure, in which a group capable of bonding to both inorganic materials (e.g., glass, metal, cement, etc.) and organic materials (e.g., synthetic resin, etc.) are present. In general, the silane coupling agent may be of the formula Y (CH)2)nSiX3Wherein n is 0 to 3.
According to the chemical bond theory, X represents hydrolyzable methoxy, ethoxy, chloro, etc., when the silane coupling agent is contacted with moisture in the air, the X in the molecule can be hydrolyzed (the hydrolysis reaction can be generated at normal temperature, and is very quick),
firm connection between the materials.
Y represents an organic functional group such as a vinyl group, an amino group, an epoxy group, etc., and some of these groups are bonded by reaction with an organic substance and have similar compatible characteristics with the organic group. Promoting the reaction between the active group 'epoxy group' on the silane coupling agent and the active hydrophilic group 'amino group' on the super absorbent branch. And the firm connection between the silane coupling agent and the super absorbent resin is ensured.
There are many studies on the coupling mechanism of silane coupling agents, and scholars have proposed chemical bond theory, interfacial layer theory, etc. successively, but due to the complexity of the mechanism, there is no unified theory that can accurately explain the coupling condition of silane coupling agents. The chemical bond theory is widely applied, but the chemical bond theory has a certain limitation and is not completely correct, for example, hydroxyl groups in polymers such as polyethylene and polypropylene do not exist, so that the polymers cannot react with the silane coupling agent, but the silane coupling agent still can effectively act with the silane coupling agent. In addition, the theoretical mechanism of chemical bonds is too simple, only the condition of a monomolecular layer is considered, and the thickness of the silane coupling agent in the interface in practical application is far larger than that of the monomolecular layer. Therefore, the theory needs further supplement and improvement of other theories. However, the silane coupling agent has a very significant bridging effect between inorganic materials and organic materials.
Detailed Description
Example 1
Epoxy resin crack pouring adhesive for repairing cement concrete cracks
The composition and the content are as follows according to the mass portion:
the component A comprises: 20 parts of waterborne epoxy resin emulsion, 5 parts of waterborne polyurethane and 5 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 20 parts of waterborne epoxy curing agent, 2 parts of talcum powder, 0.2 part of silane coupling agent, 0.2 part of ultraviolet absorber, 24 parts of superfine cement, 12.3 parts of self-repairing microspheres, 1.2 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 5 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 6 parts of super absorbent resin, 3.9 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 56 parts of methyltrimethoxysilane and 39 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 5 parts of water within 2h, continuing to react for 3h, then cooling to normal temperature, wherein methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane are subjected to hydrolysis reaction with water to generate silicon hydroxyl and methanol, and part of the silicon hydroxyl groups are subjected to further dehydration condensation to form low-degree cross-linked silicon resin, namely, prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing 10 parts of the self-repairing microsphere core material obtained in the first step into 50 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating moisture and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water and water
The low-degree cross-linked silicone resin is changed into a high-degree cross-linked cured product, namely the silicone resin, and the self-repairing microspheres are obtained.
Wherein the water-based epoxy resin emulsion is an anionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to anionic water-based polyurethane with the solid content of 35 +/-1 percent;
the acrylate emulsion is anionic pure acrylic emulsion with solid content of 50 +/-1 percent;
the water-soluble epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the particle fineness of the super absorbent resin is 100 meshes, the molecular structure of the super absorbent resin is rich in amido, and the water absorption rate is 800;
the required particle fineness of the superfine cement is 1500 meshes;
the silane coupling agent requires a silane coupling agent having an epoxy group in a molecular structure;
the defoaming agent is BYK-019;
the ultraviolet absorbent is BYK-3840.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: uniformly stirring 20 parts of aqueous epoxy resin emulsion, 5 parts of aqueous polyurethane and 5 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 20 parts of waterborne epoxy curing agent, 2 parts of talcum powder, 0.2 part of silane coupling agent, 0.2 part of ultraviolet absorber, 24 parts of superfine cement, 12.3 parts of self-repairing microspheres, 1.2 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts, and the components are uniformly stirred;
and C, component C: 5 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.167, and the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
Example 2
Epoxy resin crack pouring adhesive for repairing cement concrete cracks
The composition and the content are as follows according to the mass portion:
the component A comprises: 21.5 parts of waterborne epoxy resin emulsion, 4.5 parts of waterborne polyurethane and 4 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 21.5 parts of waterborne epoxy curing agent, 1.8 parts of talcum powder, 0.2 part of silane coupling agent, 0.2 part of ultraviolet absorber, 23.5 parts of superfine cement, 11.5 parts of self-repairing microspheres, 1.2 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 7 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 5.5 parts of super absorbent resin, 4.4 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 58 parts of methyltrimethoxysilane and 36.5 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 5.5 parts of water within 2h, continuing to react for 3h, then cooling to normal temperature, carrying out hydrolysis reaction on methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane and water in the process to generate silicon hydroxyl and methanol, further dehydrating and condensing a part of silicon hydroxyl groups to form low-degree cross-linked silicon resin, namely prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing 10 parts of the self-repairing microsphere core material obtained in the first step into 65 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating moisture and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water and water
The low-degree cross-linked silicone resin is changed into a high-degree cross-linked cured product, namely the silicone resin, and the self-repairing microspheres are obtained.
Wherein the water-based epoxy resin emulsion is an anionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to non-ionic water-based polyurethane with the solid content of 35 +/-1 percent;
the acrylate emulsion is anionic silicone-acrylate emulsion with solid content of 50 +/-1%;
the water-soluble epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the preferred particle fineness of the super absorbent resin is 500 meshes, the molecular structure of the super absorbent resin is rich in amide groups, and the water absorption rate is 900;
the superfine cement requires 3000 meshes of particle fineness;
the silane coupling agent is preferably a silane coupling agent having an epoxy group in the molecular structure;
the defoaming agent is Tech-365 w;
ultraviolet absorber UV-2.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: 21.5 parts of waterborne epoxy resin emulsion, 4.5 parts of waterborne polyurethane and 4 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 21.5 parts of waterborne epoxy curing agent, 1.8 parts of talcum powder, 0.2 part of silane coupling agent, 0.2 part of ultraviolet absorber, 23.5 parts of superfine cement, 11.5 parts of self-repairing microspheres, 1.2 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 7 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.233, and then the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
Example 3
Epoxy resin crack pouring adhesive for repairing cement concrete cracks
The composition and the content are as follows according to the mass portion:
the component A comprises: 22.5 parts of waterborne epoxy resin emulsion, 4 parts of waterborne polyurethane and 3.5 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 22.5 parts of waterborne epoxy curing agent, 1.5 parts of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorbent, 23 parts of superfine cement, 11.6 parts of self-repairing microspheres, 1.1 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 8 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 5 parts of super absorbent resin, 4.9 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 60 parts of methyltrimethoxysilane and 34 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 6 parts of water within 2h, continuing to react for 3h, then cooling to normal temperature, wherein methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane are subjected to hydrolysis reaction with water to generate silicon hydroxyl and methanol, and part of the silicon hydroxyl groups are further subjected to dehydration condensation to form low-degree cross-linked silicon resin, namely, prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing 10 parts of the self-repairing microsphere core material obtained in the first step into 75 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating water and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water and water
The low-degree cross-linked silicone resin is changed into a high-degree cross-linked cured product, namely the silicone resin, and the self-repairing microspheres are obtained.
Wherein the water-based epoxy resin emulsion is a nonionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to non-ionic water-based polyurethane with the solid content of 35 +/-1 percent;
the acrylate emulsion is nonionic styrene-acrylic emulsion with solid content of 50 +/-1 percent;
the water-soluble epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the preferred particle fineness of the super absorbent resin is 300 meshes, the molecular structure of the super absorbent resin is rich in amide groups, and the water absorption rate is 1000;
the superfine cement requires 2000 meshes of particle fineness;
the silane coupling agent is preferably a silane coupling agent having an epoxy group in the molecular structure;
the defoaming agent is Tech-365 w;
the ultraviolet absorbent is BYK-3840.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: 22.5 parts of waterborne epoxy resin emulsion, 4 parts of waterborne polyurethane and 3.5 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 22.5 parts of waterborne epoxy curing agent, 1.5 parts of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorbent, 23 parts of superfine cement, 11.6 parts of self-repairing microspheres, 1.1 parts of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 8 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.267, and then uniformly stirring, and pouring into the cement concrete cracks by using grouting equipment or depending on the self gravity of the material.
Example 4
Epoxy resin crack pouring adhesive for repairing cement concrete cracks
The composition and the content are as follows according to the mass portion:
the component A comprises: 23.5 parts of waterborne epoxy resin emulsion, 3.5 parts of waterborne polyurethane and 3 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 23.5 parts of water-based epoxy curing agent, 1.3 parts of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorbent, 22.5 parts of superfine cement, 11.4 parts of self-repairing microspheres, 1.0 part of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 9 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 4.5 parts of super absorbent resin, 5.4 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 63 parts of methyltrimethoxysilane and 30.5 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 6.5 parts of water within 2h, continuing to react for 3h, then cooling to normal temperature, carrying out hydrolysis reaction on methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane and water in the process to generate silicon hydroxyl and methanol, further dehydrating and condensing a part of silicon hydroxyl groups to form low-degree cross-linked silicon resin, namely prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing 10 parts of the self-repairing microsphere core material obtained in the first step into 85 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating water and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water and water
The low-degree cross-linked silicone resin is changed into a high-degree cross-linked cured product, namely the silicone resin, and the self-repairing microspheres are obtained.
Wherein the water-based epoxy resin emulsion is an anionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to non-ionic water-based polyurethane with the solid content of 35 +/-1 percent;
the acrylic ester emulsion is nonionic vinyl acetate emulsion with solid content of 50 +/-1 percent;
the water-soluble epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the preferred particle fineness of the super absorbent resin is 200 meshes, the molecular structure of the super absorbent resin is rich in amide groups, and the water absorption rate is 1200;
the superfine cement requires 2000 meshes of particle fineness;
the silane coupling agent is preferably a silane coupling agent having an epoxy group in the molecular structure;
the defoaming agent is Tech-365 w;
the ultraviolet absorbent is BYK-3840.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: 23.5 parts of waterborne epoxy resin emulsion, 3.5 parts of waterborne polyurethane and 3 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 23.5 parts of water-based epoxy curing agent, 1.3 parts of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorbent, 22.5 parts of superfine cement, 11.4 parts of self-repairing microspheres, 1.0 part of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 9 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.3, and then the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
Example 5
Epoxy resin crack pouring adhesive for repairing cement concrete cracks
The composition and the content are as follows according to the mass portion:
the component A comprises: 25 parts of waterborne epoxy resin emulsion, 3 parts of waterborne polyurethane and 2 parts of acrylate emulsion, wherein the total weight is 30 parts;
and B component: 25 parts of waterborne epoxy curing agent, 1 part of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorber, 22 parts of superfine cement, 10.7 parts of self-repairing microspheres, 1.0 part of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts;
and C, component C: 10 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 4 parts of super absorbent resin, 5.9 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 65 parts of methyltrimethoxysilane and 28 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 7 parts of water within 2h, continuing to react for 3h, then cooling to normal temperature, wherein methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane are subjected to hydrolysis reaction with water to generate silicon hydroxyl and methanol, and part of the silicon hydroxyl groups are subjected to further dehydration condensation to form low-degree cross-linked silicon resin, namely, prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
and (2) uniformly dispersing 10 parts of the self-repairing microsphere core material obtained in the first step into 100 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating moisture and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water, and changing the low-degree cross-linked silicon resin into a highly cross-linked condensate, namely the silicon resin to obtain the self-repairing microsphere.
Wherein the water-based epoxy resin emulsion is a nonionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to non-ionic water-based polyurethane with the solid content of 35 +/-1 percent;
the acrylic ester emulsion is nonionic vinyl acetate emulsion with solid content of 50 +/-1 percent;
the water-soluble epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the particle fineness of the super absorbent resin is 800 meshes, the molecular structure of the super absorbent resin is rich in amido, and the water absorption rate is 1500;
the superfine cement requires 2000 meshes of particle fineness;
the silane coupling agent is preferably a silane coupling agent having an epoxy group in the molecular structure;
the defoaming agent is any one of Tech-365 w;
the ultraviolet absorbent is any one of UV-2.
Preparation method of epoxy resin crack pouring adhesive for repairing cement concrete cracks
The preparation method comprises the following specific steps:
the component A comprises: uniformly stirring 25 parts of aqueous epoxy resin emulsion, 3 parts of aqueous polyurethane and 2 parts of acrylate emulsion, wherein the total amount is 30 parts;
and B component: 25 parts of waterborne epoxy curing agent, 1 part of talcum powder, 0.1 part of silane coupling agent, 0.1 part of ultraviolet absorber, 22 parts of superfine cement, 10.7 parts of self-repairing microspheres, 1.0 part of cement expanding agent and 0.1 part of defoaming agent, wherein the total amount is 60 parts, and the components are uniformly stirred;
and C, component C: 10 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.333, and then the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
Claims (3)
1. An epoxy resin crack pouring adhesive for repairing cement concrete cracks comprises the following components in parts by mass:
the component A comprises: 20-25 parts of waterborne epoxy resin emulsion, 3-5 parts of waterborne polyurethane and 2-5 parts of acrylate emulsion
And B component: 20-25 parts of a water-based epoxy curing agent, 1-2 parts of talcum powder, 0.1-0.2 part of a silane coupling agent, 0.1-0.2 part of an ultraviolet absorber, 22-24 parts of superfine cement, 10.7-12.3 parts of self-repairing microspheres, 1.0-1.2 parts of a cement expanding agent and 0.1 part of a defoaming agent, wherein the total amount is 60 parts;
and C, component C: 5-10 parts of water;
the self-repairing microsphere is prepared by the following steps:
the first step is as follows: preparing a self-repairing microsphere core material:
weighing 4-6 parts of super absorbent resin, 3.9-5.9 parts of superfine cement and 0.1 part of silane coupling agent, and mixing and stirring uniformly to obtain a self-repairing microsphere core material;
the second step is that: preparation of a protomer silicone resin:
placing 56-65 parts of methyltrimethoxysilane and 28-39 parts of diphenyldimethoxysilane into a reaction kettle, controlling the temperature to be 60-80 ℃, dropwise adding 5-7 parts of water within 2 hours, continuing to react for 3 hours, then cooling to normal temperature, wherein methoxy groups on the methyltrimethoxysilane and the diphenyldimethoxysilane are subjected to hydrolysis reaction with water in the process to generate silicon hydroxyl and methanol, and further dehydrating and condensing a part of silicon hydroxyl groups to form low-degree cross-linked silicon resin, namely prepolymer silicon resin;
the third step: preparing self-repairing microspheres by a spray drying method:
uniformly dispersing the self-repairing microsphere core material obtained in the first step into 50-100 parts of the initial polymer silicon resin obtained in the second step to form a uniform system, controlling the temperature in a spray drying chamber to be 150-200 ℃, carrying out spray drying on the initial polymer silicon resin mixed with the self-repairing microsphere core material, further evaporating moisture and methanol in the initial polymer silicon resin in high-temperature and dry air, further dehydrating and condensing silicon hydroxyl groups to generate water and water
The silicone resin with high degree of crosslinking is changed into a cured product, namely the silicone resin, so as to obtain the self-repairing microspheres.
2. The epoxy resin crack pouring adhesive for repairing cement concrete cracks as claimed in claim 1, which is characterized in that:
the water-based epoxy resin emulsion is anionic or nonionic emulsion with an epoxy value of 0.21-0.23 mol/100g and a solid content of 50 +/-1%;
the water-based polyurethane refers to anionic or nonionic water-based polyurethane with the solid content of 35 +/-1%;
the acrylic ester emulsion is anionic or nonionic emulsion with solid content of 50 +/-1%, and can be any one of pure acrylic emulsion, silicone acrylic emulsion, styrene-acrylic emulsion and vinyl acetate-acrylic emulsion;
the water-based epoxy curing agent is a water-soluble epoxy resin curing agent with an amine value of 0.11-0.12 mol/100g and a water content of not more than 0.5%;
the molecule of the super absorbent resin is provided with hydrophilic groups, the super absorbent resin can absorb a large amount of water, swell and keep the water not to flow out, the particle fineness is more than or equal to 100 meshes, the molecular structure of the super absorbent resin is rich in amide groups, and the water absorption rate is 800-1500;
the superfine cement has the required particle fineness of more than or equal to 1500 meshes;
the silane coupling agent is a compound with a special molecular structure, wherein the silane coupling agent has a group capable of being combined with an inorganic material and a group capable of being combined with an organic material, and the molecular structure of the silane coupling agent has an epoxy group;
the defoaming agent is any one of BYK-019 or Tech-365 w;
the ultraviolet absorbent is any one of BYK-3840 or UV-2.
3. A preparation method of epoxy resin crack pouring glue for repairing cement concrete cracks comprises the following specific preparation steps:
the component A comprises: uniformly stirring 20-25 parts of aqueous epoxy resin emulsion, 3-5 parts of aqueous polyurethane and 2-5 parts of acrylate emulsion to obtain 30 parts in total;
and B component: 20-25 parts of a water-based epoxy curing agent, 1-2 parts of talcum powder, 0.1-0.2 part of a silane coupling agent, 0.1-0.2 part of an ultraviolet absorber, 22-24 parts of superfine cement, 10.7-12.3 parts of self-repairing microspheres, 1.0-1.2 parts of a cement expanding agent, 0.1 part of a defoaming agent, 60 parts in total, and uniformly stirring;
and C, component C: 5-10 parts of water;
when in use, the components are mixed according to the mass ratio A: b: c is 1: 2: 0.167-0.333, and the mixture is uniformly stirred and is poured into the cement concrete cracks by grouting equipment or depending on the self gravity of the material.
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| CN101857674A (en) * | 2010-05-27 | 2010-10-13 | 大连交通大学 | Method for synthesizing high-temperature resistant organic silicon resin |
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