CN114316870A - Injection type bar planting glue and preparation method thereof - Google Patents
Injection type bar planting glue and preparation method thereof Download PDFInfo
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Abstract
The application relates to the technical field of bar planting glue, and particularly discloses injection type bar planting glue and a preparation method thereof. An injection type bar-planting adhesive comprises a first component and a second component, wherein the mass ratio of the first component to the second component is 3:1, and the first component comprises: 50-70 parts of matrix resin; 20-40 parts of modified filler; 4-6 parts of a thixotropic agent; 3-5 parts of a diluent; 2-4 parts of a coupling agent; the component B comprises: 50-60 parts of a flexible curing agent; 20-30 parts of modified filler; 6-8 parts of an accelerator; 1-3 parts of a diluent; 3-5 parts of a thixotropic agent; 2-4 parts of a coupling agent; the matrix resin comprises the following components in a mass ratio of 1-2: 4-5 of novolac epoxy resin and bisphenol A epoxy vinyl resin. The preparation method comprises the preparation of the component A, the preparation of the component B and the preparation of the injection type bar-planting glue, and the injection type bar-planting glue has good damp-heat aging resistance and prolongs the service life of the bar-planting glue.
Description
Technical Field
The application relates to the technical field of bar planting glue, and particularly discloses injection type bar planting glue and a preparation method thereof.
Background
Along with the rapid increase of the total volume of buildings in China, a part of old buildings in use are subjected to performance degradation in different degrees, and the old buildings have potential safety hazards, so that the old buildings need to be maintained, reinforced and modified to relieve the problems of population, resources and environment. In the transformation of old buildings, the connection of embedded bars is known as an efficient connection mode. Wherein, chemistry bar planting is fixed reinforcing bar or substrate through bar planting glue, not only has the reinforcement effect to building structure itself, can not produce the destruction effect to the substrate because of self inflation again simultaneously, not only can consolidate and reform transform original building, still the wide application need after plant in the engineering of reinforcing bar by the construction restriction.
The bar planting glue mainly bears compression, tension and bending loads, so that excellent mechanical properties are required. The epoxy resin type bar-planting adhesive has excellent mechanical property and adhesive property, but the cured epoxy resin has large brittleness and is easy to be subjected to brittle failure when bearing high-strength load, so that the epoxy resin type bar-planting adhesive needs to be subjected to reinforcing and toughening treatment when in use, and after a large amount of modification components are added, the uniformity and compactness of a cured product of the epoxy resin are damaged, the durability of the epoxy resin type bar-planting adhesive is influenced, and the service life is shortened. The durability of the epoxy bar-planting adhesive comprises two contents of wet-heat aging resistance and long-term stress resistance, GB50728-2011 safety identification technical Specification of engineering structure reinforcing material also specifies that the building structure adhesive with the design requirement of 30-year and 50-year durability needs to pass the test of the wet-heat aging resistance and the long-term stress resistance at the same time, so that the preparation of the bar-planting adhesive with high toughness and high wet-heat resistance is a problem to be solved at present.
Disclosure of Invention
In order to improve the strength, toughness, humidity and heat aging resistance of the bar-planting adhesive and further improve the durability of the bar-planting adhesive, the application provides an injection type bar-planting adhesive and a preparation method thereof, and the following technical scheme is adopted:
in a first aspect, the present application provides an injection type bar-planting glue, which adopts the following technical scheme: the injection type bar-planting glue comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 3:1, and the component A comprises the following substances in parts by weight: 50-70 parts of matrix resin; 20-40 parts of modified filler; 4-6 parts of a thixotropic agent; 3-5 parts of a diluent; 2-4 parts of a coupling agent; the component B comprises the following substances in parts by weight: 50-60 parts of a flexible curing agent; 20-30 parts of modified filler; 6-8 parts of an accelerator; 1-3 parts of a diluent; 3-5 parts of a thixotropic agent; 2-4 parts of a coupling agent; the matrix resin comprises the following components in a mass ratio of 1-2: 4-5 of novolac epoxy resin and bisphenol A epoxy vinyl resin.
Through the technical scheme, the selection of the matrix resin is optimized, the novolac epoxy resin and the bisphenol A epoxy vinyl resin are compounded, the bisphenol A epoxy vinyl resin is high in strength, good in adhesion and low in viscosity, and a large number of bisphenol A epoxy vinyl resin molecules are added into a novolac epoxy resin system, so that the viscosity of the novolac epoxy resin can be effectively reduced, and the construction performance of the novolac epoxy resin and the bisphenol A epoxy vinyl resin is optimized; when the crosslinking curing reaction occurs, the bisphenol A type epoxy vinyl resin is crosslinked only at unsaturated double bond positions at two ends of a molecular chain, the middle chain segment of the molecule, especially an ether group, can not be changed at all, the mobility of the molecular chain is high under the action of stress, the thermal shock and external force action can be absorbed, good heat resistance and impact resistance are shown, the epoxy groups in the phenolic epoxy resin molecule are more, the crosslinking density of a cured product is high, the two are compounded, the structural tightness of the cured product is further improved, the water vapor can be effectively blocked, the water vapor is prevented from invading into the adhesive layer, and the moisture-heat-resistant aging performance of the bar-planting adhesive is further improved; meanwhile, the two optimized matrix resins are compounded for use, so that the reaction activity is high, the curing reaction can be performed at a low temperature, the early strength performance of the matrix resins is improved, and the construction required strength can be achieved in a short time.
In addition, the curing agent, the modified filler and the functional assistant are preferably used as effective components to be added into an injection type bar-planting adhesive system, active groups in molecules of the curing agent can react with epoxy groups in matrix resin to generate a three-dimensional network structure, the mechanical property of the bar-planting adhesive is improved, and the fixing and reinforcing effects are exerted; the modified filler can be compounded with matrix resin, so that the shrinkage rate of a cured product is effectively reduced, and the mechanical property and the humidity and heat aging resistance of the bar-planting adhesive are improved; the addition of the coupling agent can promote the uniform dispersion of the raw material components and improve the bonding performance of the bar-planting glue and the construction interface, so that the bonding is tighter; the addition of the thixotropic agent can improve the consistency of the bar-planting glue and improve the construction performance.
Further, the matrix resin also comprises 5-15 parts by weight of vinyl silicon MQ resin.
By the technical scheme, the selection of the matrix resin is further optimized, the vinyl silicon MQ resin is added into the matrix resin system, and the vinyl silicon MQ resin contains organic silicon active groups, so that the thermosetting property is excellent, the heat resistance of the matrix resin system can be effectively improved, and the pyrolysis of a cured product is reduced; the ethylene group and the organic silicon resin group can also have good promotion effect on the curing of matrix resin, the curing crosslinking degree of the resin is further improved, no micromolecule by-product is generated and discharged in the curing process, the density of the cured product of the bar-planting glue is improved, the curing shrinkage rate is reduced, and the mechanical property of the bar-planting glue is improved; the vinyl silicon MQ resin has excellent hydrophobic property, and the hydrophobic effect on the surface of the bar planting glue can be improved by adding the vinyl silicon MQ resin, so that the moisture infiltration is reduced, and the water aging resistance of the bar planting glue is improved.
Further, the flexible curing agent in the component B is epoxy resin modified diethylenetriamine.
According to the technical scheme, the selection of the curing agent is optimized, the curing performance of diethylenetriamine is excellent, the cured product cured by diethylenetriamine has better chemical corrosion resistance, the diethylenetriamine is modified by adopting the epoxy resin to generate the macromolecular curing agent, the heat resistance stability of the curing agent can be effectively improved, the curing agent modified by the epoxy resin has better dispersity in an epoxy resin system according to the similar intermiscibility principle, and can be uniformly distributed in the system, the formed cured product is more uniform, and the occurrence of local brittle fracture situation is effectively reduced; the flexible long carbon chain is linked into the curing agent, so that the shock resistance of the cured product can be further improved, the toughness of the cured product is further improved, and the shear stress resistance of the product is improved.
Further, the accelerator in the component B comprises an imidazole curing agent, and the imidazole curing agent comprises at least one of N-vinylimidazole or diethyl-tetramethylimidazole.
According to the technical scheme, the accelerant is optimized in composition, the imidazole curing agent contains tertiary amine nitrogen atoms, can initiate epoxy groups to carry out anionic chain polymerization, has the characteristic of medium-temperature rapid curing, is high in curing efficiency, and can form a cured product with high thermal deformation temperature and excellent heat resistance and chemical resistance. The preferable N-vinyl imidazole and diethyl tetramethyl imidazole are low-viscosity liquids at normal temperature, can be uniformly dispersed in an epoxy resin system, are used together with a polyamine curing agent, and have an obvious promotion effect on the curing strength of the early-stage bar-planting adhesive.
Further, the diluent in the component A and the component B is propylene carbonate.
Through the technical scheme, the propylene carbonate is preferably used as a diluent in the component A and the component B, the viscosity of the component A and the component B can be effectively reduced by adding the propylene carbonate, the rheological property is improved, and the propylene carbonate is beneficial to extrusion and mixing of the component A and the component B when in use; propylene carbonate and diethylenetriamine have good chemical compounding effect, diethylenetriamine can preferentially generate ring-opening reaction with propylene carbonate, and formed amido bond is favorable for improving the bonding strength between the bar planting glue and concrete, so that the bonding is more compact, and the invasion of external penetrating water to the bar planting glue is effectively reduced.
Further, the modified fillers in the component A and the component B respectively comprise a graphene-organic montmorillonite composite material and nano calcium carbonate, the nano calcium carbonate is titanate silane coupling agent modified nano calcium carbonate, and the mass ratio of the graphene-organic montmorillonite composite material to the modified nano calcium carbonate is (1-2): 4-6.
By adopting the technical scheme, the composition of the filler and the proportion of the components are further optimized, and the nano calcium carbonate is used as inorganic rigid particles, has larger specific surface area and stronger surface activity, can improve the bonding property of a system interface, enables the bonding to be tighter, and has a more compact and waterproof structure; the bar-planting adhesive doped with the nano calcium carbonate has a very large interface, the atomic arrangement of the interface is disordered, when the bar-planting adhesive is subjected to external force deformation and thermal shock, the bar-planting adhesive is easy to migrate, and a large amount of energy and heat of plastic deformation are absorbed, so that the effects of toughening and improving the thermal stability are achieved; the titanate coupling agent modified nano calcium carbonate has good compatibility with matrix resin, high dispersibility, difficult separation of filler after curing, and hydrophobic surface of nano calcium carbonate particles after surface modification, thus reducing brittle fracture of cured products caused by molecular agglomeration, further improving the hydrophobic property of bar-planting glue, reducing infiltration and invasion of water molecules, and further improving the mechanical property and the water-aging resistance of the bar-planting glue.
The alkenyl on the surface of the organic montmorillonite layer and double bonds in the resin molecular chain can generate a crosslinking reaction, and simultaneously, the addition of the graphene can promote the further generation of the crosslinking action, and the crosslinking action can also promote the migration of the resin molecular chain to the organic montmorillonite layer to form an intercalation composite interface, so that the micro-skeleton effect is achieved, the stress can be effectively dispersed, cracking cracks can be promoted to be uniformly dispersed and terminated along the composite intercalation interface, and the compression resistance and stress fracture resistance of a resin system are improved.
The graphene-organic montmorillonite composite material has good thermal stability, and the sheet graphene-organic montmorillonite composite material and the granular nano calcium carbonate are compounded for use, so that the compactness and the continuity of a cured product can be further improved, the heat transfer is effectively blocked, and the heat-resistant stability of the cured product is further improved.
Further, the preparation of the graphene-organic montmorillonite composite material comprises the following steps: (1) modifying graphene: adding graphene and dicyclohexylcarbodiimide into a silane coupling agent, performing ultrasonic dispersion, heating, performing heat preservation reaction for 12 hours, cooling, centrifuging, washing and vacuum drying to obtain modified graphene; (2) preparing a dispersion liquid: respectively adding organic montmorillonite and modified graphene into deionized water, and performing ultrasonic dispersion to respectively obtain a modified graphene dispersion solution and an organic montmorillonite dispersion solution; (3) preparing a composite material: and adding the modified graphene dispersion liquid into the organic montmorillonite dispersion liquid, heating, keeping the temperature and stirring for 12 hours to obtain a mixed liquid, carrying out centrifugal separation on the mixed liquid, and carrying out vacuum drying to obtain the graphene-organic montmorillonite composite material.
According to the technical scheme, the preparation method of the graphene-organic montmorillonite composite material is optimized, the graphene modified by the silane coupling agent enters the sheet layer of the organic montmorillonite through hydrogen bonds and a crosslinking function intercalation, and the prepared composite material is combined more tightly through physical and chemical double functions, so that the stability of the composite material is improved; the preparation method of respectively preparing and mixing the dispersion liquid of each component is adopted, so that the dispersion of each component is more uniform, the possibility of agglomeration during graphene intercalation can be effectively reduced, and the prepared material is more uniform and stable.
In a second aspect, the application provides a preparation method of an injection type bar-planting glue, comprising the following preparation steps: s1: preparation of a component A: weighing the raw materials according to the proportion of the component A, firstly adding the matrix resin and the coupling agent into a reaction container, stirring and mixing to obtain a mixture A, then adding the modified filler, the diluent and the thixotropic agent into the mixture A while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring, and carrying out ultrasonic dispersion defoaming to finish the preparation of the component A; s2: b, preparation of a component B: weighing the raw materials according to the proportion of the component B, firstly adding the flexible curing agent, the accelerator and the coupling agent into a reaction container, fully stirring the mixed mixture B, then adding the modified filler and the diluent into the mixture B while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring, carrying out ultrasonic dispersion defoaming, and completing the preparation of the component B; s3: preparing injection type bar planting glue: and injecting the component A and the component B into the double rubber pipes according to the mass ratio of 3:1, and sealing by a sealing cover to obtain the injection type bar-planting glue.
Through above-mentioned technical scheme, this application has optimized the order of adding of each raw materials component, and the step-by-step addition mixes, can effectively promote the homodisperse of each component, and the stirring of vacuum pressurize, supersound dispersion defoaming is favorable to improving the homogeneity and the compactedness of first second component, and after the encapsulation, during the use, each effective component is more even, has reduced the fracture condition because of mixing inhomogeneous and leading to during the use, further improves the density of solidification product to improve the durability that the bar planting was glued.
In summary, the present application has the following beneficial effects:
1. the method optimizes the selection of matrix resin, adopts novolac epoxy resin, bisphenol A type epoxy vinyl resin and vinyl silicon MQ resin for compounding, has high reaction activity of the compounded resin system, can be cured at low temperature, and has excellent early strength performance; the curing crosslinking degree of the compounded resin is further improved, an interpenetrating polymer network structure can be formed, and the heat resistance and the impact resistance of the matrix resin are effectively improved; the compounded matrix resin has a compact structure and a hydrophobic surface, and can effectively prevent the infiltration and invasion of water vapor, thereby improving the water aging resistance of the cured bar-planting adhesive.
2. This application self-control flexible curing agent through epoxy modified diethylenetriamine, inserts the curing agent of flexible long carbon chain and has improved the shock resistance of cured product, and according to similar compatible principle, has promoted modified diethylenetriamine and has glued evenly distributed in the system at the bar planting for the curing reaction is more even, effectively reduces the emergence of the local brittle fracture condition, thereby improves the durability that the bar planting glued.
3. The composition and the proportion of each component of the modified filler are optimized, the titanate coupling agent modified nano calcium carbonate has good compatibility with matrix resin and high dispersibility, and the reinforcing and toughening effects of the nano material on the matrix resin are effectively exerted; the graphene-organic montmorillonite composite material and matrix resin form an intercalation composite interface, so that the function of a micro-skeleton is achieved, and the compression resistance and stress fracture resistance of a resin system are improved; and the flaky graphene-organic montmorillonite composite material and the granular nano calcium carbonate are compounded for use, so that the compactness and continuity of a cured product can be further improved, and the durability of the bar-planting adhesive is further improved.
4. The selection of an accelerator and a diluent is optimized, the imidazole curing agent serving as the accelerator has high curing efficiency, is compounded with a polyamine curing agent for use, has an obvious accelerating effect on the curing strength of the early-stage bar-planting adhesive, and has good heat resistance of a cured product; propylene carbonate adds as the diluent and can effectively reduce the viscosity of first second component, improves rheological property, is favorable to extruding and mixing of first second component, can form good chemical complex effect with flexible curing agent simultaneously, improves the bonding ability of bar planting glue and external concrete interface for the contact interface bonds more closely knit, effectively reduces the invasion of external infiltration water to the bar planting glue, thereby improves the water-resistant ageing resistance of bar planting glue.
5. The preparation method of the injection type bar-planting glue is further optimized, the adding sequence of each raw material component is optimized, the vacuum pressure maintaining stirring and ultrasonic dispersion defoaming technology is adopted, the uniform mixing and the compactness of each component are effectively promoted, the more excellent mixing and curing effects are obtained when the bar-planting glue is extruded, and the stability of the product is improved.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
The starting materials in this application may be commercially available products, and the following sources are merely exemplary and are not representative of the indicated starting materials.
The novolac epoxy resin F51 is purchased from Sancheng chemical Co., Ltd, Guangzhou city;
bisphenol a epoxy vinyl resin was purchased from bonito composites, inc;
the vinyl MQ resin is purchased from Guangzhou Silicones Silicone raw materials Co;
TY-710C type organic montmorillonite was purchased from Guangzhou hundred million peaking Industrial technologies, Inc.;
model 4566N-vinylimidazole from Shanghai Lingmi chemical Co., Ltd;
diethyl tetramethyl imidazole and propylene carbonate are available from Shanghai Ethyl chemical Co., Ltd;
diethylenetriamine was purchased from Guangzhou light in Biotech force suppliers;
diethylene glycol methyl ether type ZK-211109-01 was purchased from Jinze chemical industries, Ltd;
kanji chemical Co., Ltd of butyl epoxy oleate;
the KD-4810 type bisphenol A liquid epoxy resin is purchased from a supplier with the scientific and technological strength of new materials;
the type 201 titanate coupling agent is purchased from a plastic chemical industry strength supplier in ancient cooking vessel of Dongguan;
the nano-grade calcium carbonate is purchased from Jingjiang city Gao chemical Co., Ltd;
dicyclohexylcarbodiimide type DN-TE9 was purchased from Shandong Denno chemical Co., Ltd;
PT-C-001 type graphene is purchased from Shanghai Pantian powder materials Co., Ltd;
the KH-550 type silane coupling agent is purchased from Shandong energy-gathering chemical Co., Ltd;
the thixotropic agent in the raw material is fumed silica, and the coupling agent is a KH-550 type silane coupling agent.
Preparation example
Preparation example 1
Respectively weighing 5kg of diethylenetriamine, 13kg of diethylene glycol methyl ether, 6kg of bisphenol A liquid epoxy resin and 12kg of epoxy butyl oleate, adding 5kg of diethylenetriamine into 8kg of diethylene glycol methyl ether, heating to 65 ℃ while stirring, continuously stirring at a constant temperature, dropwise adding bisphenol A liquid epoxy resin into the mixed solution, controlling the dropwise adding speed to be 20g/min and lasting for 5h, continuously reacting for 1h after the dropwise adding is finished to obtain a diethylenetriamine-epoxy resin prepolymer, adding 5kg of diethylene glycol methyl ether into the prepolymer, controlling the temperature to be 60 ℃, continuously dropwise adding epoxy butyl oleate, controlling the dropwise adding speed to be 50g/min and lasting for 4h, continuously reacting for 30min after the dropwise adding is finished, and distilling and passivating the product to obtain the flexible curing agent. The steps are repeated for a plurality of times to meet the use requirement.
Preparation example 2
Adding 10kg of nano calcium carbonate into 20L of absolute ethyl alcohol, stirring, performing ultrasonic dispersion for 30min to obtain uniform suspension, adding 1.5kg of titanate coupling agent into the suspension, performing ultrasonic mixing for 10min, raising the temperature to 60 ℃, performing constant-temperature reaction for 6h, separating the reaction liquid by using a high-speed centrifuge, controlling the rotation speed of the centrifuge to 8000r/min, performing vacuum drying on the separated product, and grinding to obtain the modified nano calcium carbonate. The steps are repeated, and the preparation is carried out for multiple times to meet the use requirement.
Preparation example 3
Respectively weighing 5kg of KH-550 type silane coupling agent, 0.8kg of graphene and 0.4kg of dicyclohexylcarbodiimide, adding the graphene and the dicyclohexylcarbodiimide into the silane coupling agent, ultrasonically dispersing for 1h, raising the temperature to 75 ℃, carrying out heat preservation reaction for 12h, cooling, centrifuging, washing and vacuum drying to obtain modified graphene; the steps are repeated, and the preparation is carried out for multiple times to meet the use requirement.
Preparation example 4
Respectively weighing 10kg of organic montmorillonite, 1kg of modified graphene and 18kg of deionized water, adding the organic montmorillonite into 15kg of deionized water, adding the modified graphene into 3kg of deionized water, and ultrasonically dispersing for 30min to respectively obtain a modified graphene dispersion liquid and an organic montmorillonite dispersion liquid; adding the modified graphene dispersion liquid into the organic montmorillonite dispersion liquid while stirring, stirring for 12 hours under heat preservation to obtain a mixed liquid, carrying out centrifugal separation on the mixed liquid, and drying a separated product in vacuum to obtain the graphene-organic montmorillonite composite material.
Preparation examples 5 to 7
And respectively weighing novolac epoxy resin and bisphenol A epoxy vinyl resin, wherein the specific mass is shown in Table 1, and mixing to obtain matrix resin 1-3.
TABLE 1 preparation examples 5 to 7 raw material compositions
Preparation examples 8 to 10
The graphene-organic montmorillonite composite material and the modified nano calcium carbonate are respectively weighed, the specific mass is shown in table 2, and the modified filler 1-3 can be obtained after mixing.
TABLE 2 preparation examples 8 to 10 raw material compositions
Preparation examples 11 to 13
N-vinylimidazole and diethyltetramethylimidazole were weighed separately, the specific masses are shown in Table 3, and accelerators 1-3 were mixed.
TABLE 3 preparation examples 11 to 13 raw material compositions
Examples
Example 1
In a first aspect, the application provides an injection type bar planting glue, which comprises two components, namely a component A and a component B, wherein the component A comprises the following substances by weight: 5kg of matrix resin 1, 2kg of modified filler 1, 0.4kg of thixotropic agent, 0.3kg of propylene carbonate, 0.2kg of coupling agent and a component B which comprise the following substances in parts by weight: 5kg of flexible curing agent, 2kg of modified filler, 0.6kg of accelerator 1, 0.1kg of propylene carbonate, 0.3kg of thixotropic agent and 0.2kg of coupling agent.
In a second aspect, the application provides a preparation method of an injection type bar-planting glue, comprising the following preparation steps: s1: preparation of a component A: weighing the raw materials according to the proportion of the component A, firstly adding the matrix resin 1 and the coupling agent into a reaction container, stirring and mixing to obtain a mixture A, then adding the modified filler 1, the propylene carbonate and the thixotropic agent into the mixture A while stirring, after the addition is finished, carrying out vacuum pressure maintaining stirring for 30min, and carrying out ultrasonic dispersion and defoaming to finish the preparation of the component A; s2: b, preparation of a component B: weighing the raw materials according to the proportion of the component B, firstly adding the flexible curing agent, the accelerator 1 and the coupling agent into a reaction vessel, fully stirring the mixed mixture B, then adding the modified filler 1 and the propylene carbonate into the mixture while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring for 30min, ultrasonically dispersing and defoaming, and completing the preparation of the component B; s3: preparing injection type bar planting glue: and respectively injecting 3kg of the component A and 1kg of the component B into the double rubber pipes, and sealing by a sealing cover to obtain the injection type bar-planting adhesive.
Example 2
In a first aspect, the application provides an injection type bar planting glue, which comprises two components, namely a component A and a component B, wherein the component A comprises the following substances by weight: 6kg of matrix resin 1, 3kg of modified filler 1, 0.5kg of thixotropic agent, 0.4kg of propylene carbonate, 0.3kg of coupling agent and a component B which comprise the following substances in parts by weight: 5.5kg of flexible curing agent, 2.5kg of modified filler, 0.7kg of accelerator 1, 0.2kg of propylene carbonate, 0.4kg of thixotropic agent and 0.3kg of coupling agent.
In a second aspect, the application provides a preparation method of an injection type bar-planting glue, comprising the following preparation steps: s1: preparation of a component A: weighing the raw materials according to the proportion of the component A, firstly adding the matrix resin 1 and the coupling agent into a reaction container, stirring and mixing to obtain a mixture A, then adding the modified filler 1, the propylene carbonate and the thixotropic agent into the mixture A while stirring, after the addition is finished, carrying out vacuum pressure maintaining stirring for 30min, and carrying out ultrasonic dispersion and defoaming to finish the preparation of the component A; s2: b, preparation of a component B: weighing the raw materials according to the proportion of the component B, firstly adding the flexible curing agent, the accelerator 1 and the coupling agent into a reaction vessel, fully stirring the mixed mixture B, then adding the modified filler 1 and the propylene carbonate into the mixture while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring for 30min, ultrasonically dispersing and defoaming, and completing the preparation of the component B; s3: preparing injection type bar planting glue: and respectively injecting 3kg of the component A and 1kg of the component B into the double rubber pipes, and sealing by a sealing cover to obtain the injection type bar-planting adhesive.
Example 3
In a first aspect, the application provides an injection type bar planting glue, which comprises two components, namely a component A and a component B, wherein the component A comprises the following substances by weight: 7kg of matrix resin 1, 4kg of modified filler 1, 0.6kg of thixotropic agent, 0.5kg of propylene carbonate, 0.4kg of coupling agent and a component B which comprise the following substances in parts by weight: 6kg of flexible curing agent, 3kg of modified filler, 0.8kg of accelerator 1, 0.3kg of propylene carbonate, 0.5kg of thixotropic agent and 0.4kg of coupling agent.
In a second aspect, the application provides a preparation method of an injection type bar-planting glue, comprising the following preparation steps: s1: preparation of a component A: weighing the raw materials according to the proportion of the component A, firstly adding the matrix resin 1 and the coupling agent into a reaction container, stirring and mixing to obtain a mixture A, then adding the modified filler 1, the propylene carbonate and the thixotropic agent into the mixture A while stirring, after the addition is finished, carrying out vacuum pressure maintaining stirring for 30min, and carrying out ultrasonic dispersion and defoaming to finish the preparation of the component A; s2: b, preparation of a component B: weighing the raw materials according to the proportion of the component B, firstly adding the flexible curing agent, the accelerator 1 and the coupling agent into a reaction vessel, fully stirring the mixed mixture B, then adding the modified filler 1 and the propylene carbonate into the mixture while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring for 30min, ultrasonically dispersing and defoaming, and completing the preparation of the component B; s3: preparing injection type bar planting glue: and respectively injecting 3kg of the component A and 1kg of the component B into the double rubber pipes, and sealing by a sealing cover to obtain the injection type bar-planting adhesive.
Examples 4 to 6
The difference from example 2 is that: the vinyl silicone MQ resin is weighed, the specific mass is shown in Table 4, the vinyl silicone MQ resin and the matrix resin are added into a reaction vessel and stirred and mixed, and the rest preparation conditions and the preparation environment are the same as those of the example 2, so as to prepare the injection type bar planting glue.
Table 4 examples 4-6 raw material compositions
Examples 7 to 8
The difference from example 5 is that: the matrix resin 1 was replaced with the matrix resin 2-3 to prepare an injection-type bar-planting glue, and the other preparation conditions and preparation environments were the same as those in example 5.
Examples 9 to 10
The difference from example 7 is that: the modified filler 2-3 is used to replace the modified filler 1 to prepare the injection type bar-planting glue, and the rest of the preparation conditions and the preparation environment are the same as those of the example 7.
Examples 11 to 12
The difference from example 9 is that: the injection type bar planting glue is prepared by replacing the accelerant 1 with the accelerant 2-3, and the other preparation conditions and the preparation environment are the same as those of the example 9.
Comparative example
Comparative example 1
The difference from example 1 is that: only bisphenol A type epoxy vinyl resin was added as a base resin in the preparation process, and the rest of the preparation process and conditions were the same as in example 1.
Comparative example 2
The difference from example 1 is that: only unmodified nano calcium carbonate is added as a modified filler in the preparation process, and the rest of the preparation process and conditions are the same as those in example 1.
Comparative example 3
The difference from example 1 is that: only diethylenetriamine was added as a curing agent during the preparation, and the rest of the preparation process and conditions were the same as those of example 1.
Test experiments
The injection type bar-planting glue prepared in examples 1-12 and comparative examples 1-3 were tested for tensile and shear strength, resistance to wet heat aging and resistance to long-term stress.
Test method
(1) Tensile shear strength: the test was carried out in reference to GB/T7124-2008 "determination of tensile shear strength of adhesive (rigid material vs rigid material)".
(2) Resistance to wet heat aging test: and (3) aging the tensile shear-resistant sample in a constant temperature and humidity box with the temperature of 50 ℃ and the relative humidity of 95% for 90d, and cooling to room temperature for tensile shear-resistant strength test.
(3) Long-term stress action resistance test: in the environment of (23 +/-2) DEG C and relative humidity (50 +/-5)%, a creep testing machine is adopted to apply 4.0MPa shear stress continuous action 210d to the tensile shear test piece, and the creep distance is measured.
TABLE 5 Performance test of examples 1-12 and comparative examples 1-3
Table 5 test results were analyzed:
(1) the injection type bar planting glue prepared by the examples 1-3 has higher initial tensile shear strength and higher tensile shear strength after humid heat aging than the comparative example 1 and higher percentage reduction of tensile shear strength than the comparative example 1 by combining the examples 1-3 and the comparative example 1 and analyzing by combining the data in the table 5, which shows that after the novolac epoxy resin and the bisphenol A type epoxy vinyl resin are compounded,
the curing crosslinking density of the bisphenol A epoxy vinyl resin and the bisphenol A epoxy vinyl resin is larger than that of single bisphenol A epoxy vinyl resin, the structure of a cured product is compact, water vapor can be effectively prevented from invading a glue layer, and the two resins can form an interpenetrating polymer network structure, so that the heat resistance and the impact resistance of matrix resin are effectively improved. In the actual preparation and test processes, the bar-planting adhesive prepared in the comparative example 1 has low thixotropy and can generate sagging phenomenon when being used vertically, which shows that the construction performance of the bar-planting adhesive can be improved by compounding the novolac epoxy resin and the bisphenol A type epoxy vinyl resin.
(2) The injection type bar-planting adhesive prepared in the embodiment 1-3 has the initial tensile shear strength and the tensile shear strength after the humid and hot aging which are both far higher than those of the comparative example 2 and the tensile shear strength reduction percentage is also far higher than that of the comparative example 1 by combining the data of the table 5, which is shown in the embodiment 1-3, and the compactness and the continuity of a cured product can be effectively improved by compounding the modified nano calcium carbonate and the graphene-organic montmorillonite composite material, and the heat transfer can be effectively blocked by the layered organic montmorillonite structure, so that the heat resistance stability and the water aging resistance of the cured product are improved; the unmodified nano calcium carbonate adopted in the comparative example has poor compounding effect with a matrix, is not uniformly dispersed, is easy to generate micro cracks at the aggregation position of particles, and leads water vapor to enter the inside of a colloid, so the tensile shear strength is lower, and the humidity and heat resistance and aging resistance are also poor.
(3) The examples 1-3 and the comparative example 3 are combined, and the data in the table 5 are combined for analysis, so that the initial tensile shear strength and the tensile shear strength after humid and hot aging of the injection type bar-planting adhesive prepared in the examples 1-3 are higher than those of the comparative example 3, because the non-modified diethylenetriamine serving as a curing agent has a poor compounding effect with a matrix in matrix resin and is easy to precipitate during curing, and thus local brittle fracture occurs, and the compounding effect of the epoxy resin modified curing agent and the matrix is high, so that the epoxy resin modified curing agent has more excellent mechanical properties.
(4) The initial tensile shear strength and the tensile shear strength after the wet-heat aging of the injection type bar-planting glue prepared in the examples 4-6 are higher than those of the injection type bar-planting glue prepared in the example 2 by combining the data of the table 5, which shows that the wet-heat aging resistance and the mechanical property of the bar-planting glue can be effectively improved by adding the vinyl MQ resin, because the interpenetrating crosslinking degree of the cured product can be further improved by adding the three resins, the heat resistance stability of the resin system can be improved by introducing the resin silicon active group, the hydrophobic effect on the surface of the cured product is also improved, the moisture infiltration is reduced, and the water aging resistance of the bar-planting glue is further improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The injection type bar-planting adhesive is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is 3:1, and the component A comprises the following substances in parts by weight:
50-70 parts of matrix resin;
20-40 parts of modified filler;
4-6 parts of a thixotropic agent;
3-5 parts of a diluent;
2-4 parts of a coupling agent;
the component B comprises the following substances in parts by weight:
50-60 parts of a flexible curing agent;
20-30 parts of modified filler;
6-8 parts of an accelerator;
1-3 parts of a diluent;
3-5 parts of a thixotropic agent;
2-4 parts of a coupling agent;
the matrix resin comprises the following components in a mass ratio of 1-2: 4-5 of novolac epoxy resin and bisphenol A epoxy vinyl resin.
2. An injection type bar planting glue according to claim 1, characterized in that the matrix resin further comprises 5-15 parts by weight of vinyl silicone MQ resin.
3. The injection type bar planting glue of claim 1, wherein the flexible curing agent in the component B is epoxy resin modified diethylenetriamine.
4. An injection type bar-planting glue according to claim 1, wherein the accelerator in the component B comprises an imidazole curing agent, and the imidazole curing agent comprises at least one of N-vinylimidazole or diethyltetramethylimidazole.
5. The injection type steel bar planting adhesive as claimed in claim 1, wherein the diluent in the component A and B is propylene carbonate.
6. The injection type bar-planting adhesive according to claim 1, wherein the modified fillers in the component A and the component B respectively comprise a graphene-organic montmorillonite composite material and nano calcium carbonate, the nano calcium carbonate is titanate silane coupling agent modified nano calcium carbonate, and the mass ratio of the graphene-organic montmorillonite composite material to the modified nano calcium carbonate is 1-2: 4-6.
7. The injection type bar-planting adhesive according to claim 6, wherein the preparation of the graphene-organic montmorillonite composite material comprises the following steps:
(1) modifying graphene: adding graphene and dicyclohexylcarbodiimide into a silane coupling agent, performing ultrasonic dispersion, heating, performing heat preservation reaction for 12 hours, cooling, centrifuging, washing and vacuum drying to obtain modified graphene;
(2) preparing a dispersion liquid: respectively adding organic montmorillonite and modified graphene into deionized water, and performing ultrasonic dispersion to respectively obtain a modified graphene dispersion solution and an organic montmorillonite dispersion solution;
(3) preparing a composite material: adding the modified graphene dispersion liquid into the organic montmorillonite dispersion liquid, heating, keeping the temperature and stirring for 12 hours to obtain a mixed liquid, carrying out centrifugal separation on the mixed liquid, and carrying out vacuum drying to obtain the graphene-organic montmorillonite composite material.
8. The preparation method of the injection type bar-planting glue according to any one of claims 1 to 7, which is characterized by comprising the following preparation steps:
s1: preparation of a component A:
weighing the raw materials according to the proportion of the component A, firstly adding the matrix resin and the coupling agent into a reaction container, stirring and mixing to obtain a mixture A, then adding the modified filler, the diluent and the thixotropic agent into the mixture A while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring, and carrying out ultrasonic dispersion defoaming to finish the preparation of the component A;
s2: b, preparation of a component B:
weighing the raw materials according to the proportion of the component B, firstly adding the flexible curing agent, the accelerator and the coupling agent into a reaction container, fully stirring the mixed mixture B, then adding the modified filler and the diluent into the mixture B while stirring, after the addition is finished, carrying out vacuum pressure-maintaining stirring, carrying out ultrasonic dispersion defoaming, and completing the preparation of the component B;
s3: preparing injection type bar planting glue:
and injecting the component A and the component B into the double rubber pipes according to the mass ratio of 3:1, and sealing by a sealing cover to obtain the injection type bar-planting glue.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117229743A (en) * | 2023-11-02 | 2023-12-15 | 惠州市迪固建筑材料有限公司 | Low-temperature epoxy bar planting adhesive and preparation method thereof |
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| US20120029115A1 (en) * | 2009-02-27 | 2012-02-02 | Haiping Wu | Room-temperature curable epoxy structural adhesive composition and preparation method thereof |
| CN103614104A (en) * | 2013-11-13 | 2014-03-05 | 苏州市姑苏新型建材有限公司 | Low-temperature epoxy adhesive for embedded steel bars and preparation method of adhesive |
| CN106118567A (en) * | 2016-06-24 | 2016-11-16 | 卡本复合材料（天津）有限公司 | A kind of bi-component injection epoxy anchoring adhesive and preparation method thereof |
| CN109337299A (en) * | 2018-09-11 | 2019-02-15 | 法施达(大连)工程材料有限公司 | A kind of modified vinyl anchoring adhesive and preparation method thereof |
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| US20120029115A1 (en) * | 2009-02-27 | 2012-02-02 | Haiping Wu | Room-temperature curable epoxy structural adhesive composition and preparation method thereof |
| CN103614104A (en) * | 2013-11-13 | 2014-03-05 | 苏州市姑苏新型建材有限公司 | Low-temperature epoxy adhesive for embedded steel bars and preparation method of adhesive |
| CN106118567A (en) * | 2016-06-24 | 2016-11-16 | 卡本复合材料（天津）有限公司 | A kind of bi-component injection epoxy anchoring adhesive and preparation method thereof |
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| CN117229743A (en) * | 2023-11-02 | 2023-12-15 | 惠州市迪固建筑材料有限公司 | Low-temperature epoxy bar planting adhesive and preparation method thereof |
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