CN114836156B - Epoxy adhesive capable of being constructed with water and application thereof - Google Patents
Epoxy adhesive capable of being constructed with water and application thereof Download PDFInfo
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- CN114836156B CN114836156B CN202210524461.3A CN202210524461A CN114836156B CN 114836156 B CN114836156 B CN 114836156B CN 202210524461 A CN202210524461 A CN 202210524461A CN 114836156 B CN114836156 B CN 114836156B
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- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/56—Amines together with other curing agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
- C08G59/623—Aminophenols
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Epoxy Resins (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides an epoxy adhesive capable of being constructed with water and application thereof, and belongs to the technical field of pavement paving materials. According to the invention, the water resistance and toughness of the epoxy resin are effectively improved by introducing the curing agent with the cardanol structure, the epoxy resin has excellent curing performance in a high-humidity environment, and the adhesion promoter with the epoxy group and/or isocyanate group reactive group can improve the interfacial adhesion of the epoxy resin, so that the epoxy resin still has excellent interfacial adhesion performance and can still maintain excellent comprehensive performance on steel or concrete base surfaces after being boiled in water at high temperature, and thus, the construction of the wet/water-bearing concrete or steel base surfaces with water can be realized. The epoxy adhesive provided by the invention has the advantages of outstanding interfacial bonding performance, high-temperature boiling resistance, good flexibility, long service life and excellent comprehensive performance, can be used for construction on wet/waterway bridge floors, can reduce the dependence on the construction environment, ensures the construction quality and improves the construction efficiency.
Description
Technical Field
The invention relates to the technical field of pavement paving materials, in particular to an epoxy adhesive capable of being constructed with water and application thereof.
Background
In recent years, with the development of road traffic and material industry, epoxy thin layer paving materials are more and more widely applied. Typical epoxy thin-layer paving applications include highway ramps, tunnel entrances and exits, municipal road intersections, ramps, bus stations, sidewalks, and the like. The epoxy thin layer pavement can greatly improve the antiskid performance of the pavement, has the effects of attractiveness, water resistance, wear resistance and the like, can improve the function reduction of the road caused by long-term use, and improves the traffic safety and road appearance. But the use environment of the roads subjected to a large amount of traffic and exposed to the sun and rain presents a severe challenge for epoxy thin layer materials. Particularly, during construction, the base surface is often in a state of high humidity or water due to limited conditions, and the presence of water molecules not only can influence the curing process of the epoxy adhesive, but also has obvious influence on the performance after curing. According to the practical experience of early engineering, the thin epoxy layer manufactured on a rainy or wet base surface often has the quality problems that the local shedding of the pavement layer occurs within half a year after the application. However, in actual construction, especially tunnels or road decks with low topography, absolute drying of the road surface cannot be achieved. Moreover, rain is inevitably generated during construction, and the construction cost is sharply increased when the machine is stopped in case of rain. Therefore, the existing epoxy thin layer can not ensure the construction quality and can cause great improvement of the construction cost under the working condition that the base surface is moist or has water.
Disclosure of Invention
The invention aims to provide an epoxy adhesive capable of being constructed with water and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an epoxy adhesive capable of being constructed with water, which comprises a first component and a second component which are independently packaged in parts by mass; the first component comprises 100 parts of epoxy resin, 5-20 parts of toughening agent, 5-30 parts of reactive diluent and 0.5-2 parts of adhesion promoter; the adhesion promoter contains epoxy groups and/or isocyanate groups;
the second component comprises 2-10 parts of curing accelerator and 90-98 parts of curing agent; the curing agent contains a cardanol structure.
Preferably, the mass ratio of the first component to the second component is 1 (0.5-0.8).
Preferably, the epoxy resin is bisphenol A type epoxy resin and/or alicyclic epoxy resin; when the epoxy resin is bisphenol A epoxy resin and alicyclic epoxy resin, the mass ratio of the bisphenol A epoxy resin to the alicyclic epoxy resin is (60-95): (5-40).
Preferably, the toughening agent is epoxy-terminated polyurethane.
Preferably, the epoxy-terminated polyurethane is NPER-133L and/or QS-P24F.
Preferably, the reactive diluent is one or more of polypropylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether and hexanediol diglycidyl ether.
Preferably, the adhesion promoter is an epoxy-containing silane compound and/or an isocyanate-containing silane compound.
Preferably, the curing accelerator is a tertiary amine accelerator; the curing agent is at least two of cardanol modified hexamethylene diamine, a cardanol phenolic amide curing agent and a polyether amine curing agent.
Preferably, the cardanol modified hexamethylene diamine is prepared by reacting cardanol, formaldehyde and hexamethylene diamine through a MANNICH reaction; the cashew phenolic aldehyde amide curing agent is at least one of NX 3040, NX 1544 and NX 3060; the polyether amine curing agent is D230 and/or D403.
The invention provides the application of the epoxy adhesive capable of being constructed with water in the technical scheme as an adhesive for paving thin layers of road and bridge surfaces under the working condition of humidity or water.
The epoxy adhesive capable of being constructed with water provided by the invention has the advantages that the water resistance and toughness of the epoxy resin are effectively improved by introducing the curing agent with the cardanol structure, the epoxy adhesive has excellent curing performance in a high-humidity environment, and the adhesion promoter with the epoxy group and/or the isocyanate group reactive group can form a chemical bond with the epoxy resin and a base surface, so that the interfacial adhesion force of the epoxy adhesive is improved, the epoxy adhesive still has excellent interfacial adhesion performance to steel or concrete base surfaces after being boiled in high-temperature water, and the excellent comprehensive performance can be still maintained, so that the construction with water of moist/concrete or steel base surfaces can be realized. The epoxy adhesive provided by the invention has the advantages of outstanding interfacial bonding performance, high-temperature boiling resistance, good flexibility, long service life and excellent comprehensive performance, can be used for construction on wet/waterway bridge floors, can reduce the dependence on the construction environment, ensures the construction quality and improves the construction efficiency.
Furthermore, the flexibility of the epoxy resin is effectively improved by introducing the alicyclic epoxy resin, the toughening agent and the curing agent.
Detailed Description
The invention provides an epoxy adhesive capable of being constructed with water, which comprises a first component and a second component which are independently packaged in parts by mass; the first component comprises 100 parts of epoxy resin, 5-20 parts of toughening agent, 5-30 parts of reactive diluent and 0.5-2 parts of adhesion promoter; the adhesion promoter contains epoxy groups and/or isocyanate groups;
the second component comprises 2-10 parts of curing accelerator and 90-98 parts of curing agent; the curing agent contains a cardanol structure.
In the present invention, unless otherwise specified, all the starting materials required for the preparation are commercially available products well known to those skilled in the art.
The epoxy adhesive capable of being constructed with water comprises a first component in parts by mass; the first component comprises 100 parts of epoxy resin. In the present invention, the epoxy resin is preferably a bisphenol a type epoxy resin and/or a cycloaliphatic epoxy resin; when the epoxy resin is a bisphenol a type epoxy resin and an alicyclic epoxy resin, the mass ratio of the bisphenol a type epoxy resin to the alicyclic epoxy resin is preferably (60 to 95): (5 to 40), more preferably (65 to 90) to (10 to 35), still more preferably (75 to 80) to (20 to 25). In the present invention, the bisphenol A type epoxy resin is preferably E-51, and the alicyclic epoxy resin is preferably CELLOXIDE 2081.
Due to the structural characteristics of the alicyclic epoxy resin, the alicyclic epoxy resin has excellent heat resistance and weather resistance, and meanwhile, the selected CELLOXIDE 2081 molecule has a long carbon chain structure and low viscosity, so that the flexibility can be improved, and the viscosity of the component A can be reduced; the bisphenol A epoxy resin has the advantages of easily available raw materials and low cost, and the excellent comprehensive performance can be obtained by matching two epoxy resins for use and complementing the advantages and the disadvantages.
Based on the mass parts of the epoxy resin, the epoxy adhesive capable of being constructed with water provided by the invention comprises 5-20 parts of a toughening agent, preferably 6-18 parts, more preferably 8-15 parts, and further preferably 12-15 parts. In the present invention, the toughening agent is preferably an epoxy-terminated polyurethane; the epoxy-terminated polyurethane is preferably NPER-133L and/or QS-P24F; when the toughening agents are two of the toughening agents, the proportion of different toughening agents is not specially limited, and the toughening agents can be mixed at any proportion. The toughening agent used in the invention is epoxy-terminated polyurethane, which has epoxy groups and can participate in a cross-linking structure, so that the flexibility is improved and the strength is maintained.
Based on the mass parts of the epoxy resin, the epoxy adhesive capable of being constructed with water provided by the invention comprises 5-30 parts of reactive diluent, preferably 7.5-27.5 parts, more preferably 10-25 parts, and further preferably 20 parts. In the invention, the reactive diluent is preferably one or more of polypropylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether and hexanediol diglycidyl ether. The reactive diluent used in the invention has a reactive epoxy group, has a long carbon chain structure, and not only has a diluting effect, but also has a certain toughening effect.
Based on the mass parts of the epoxy resin, the epoxy adhesive capable of being constructed with water provided by the invention comprises 0.5-2 parts of adhesion promoter, preferably 0.75-1.5 parts, more preferably 0.8-1.2 parts, and further preferably 1.0 part. In the present invention, the adhesion promoter is preferably an epoxy-containing silane compound and/or an isocyanate-containing silane compound. In the present invention, the epoxy group-containing silane compound is preferably 2- (3,4-epoxycyclohexylalkyl) ethyltrimethoxysilane (A-186), and the isocyanato group-containing silane compound is preferably γ -isocyanatopropyltrimethoxysilane (Si-335). The adhesion promoter used in the invention has epoxy groups or isocyanate groups which can participate in the reaction, and can further improve the interfacial adhesion of the epoxy resin.
Based on the mass parts of the epoxy resin, the epoxy adhesive capable of being constructed with water comprises a second component; the second component comprises 2 to 10 parts of curing accelerator, preferably 3 to 8 parts, more preferably 6 to 7.5 parts, and further preferably 6.5 parts. In the present invention, the curing accelerator is preferably a tertiary amine-based accelerator; the tertiary amine accelerator is preferably 2,4,6-tris (dimethylaminomethyl) phenol; the 2,4,6-tris (dimethylaminomethyl) phenol is preferably K54 or DMP-30 in type.
The second component of the epoxy adhesive capable of being constructed with water comprises 90-98 parts by mass of a curing agent, preferably 92-97 parts by mass, more preferably 92.5-96 parts by mass, and further preferably 93.5-95 parts by mass. In the present invention, the curing agent is preferably at least two of cardanol-modified hexamethylenediamine, a cardanol phenolic amide curing agent, and a polyetheramine curing agent. When the curing agents are more than two of the curing agents, the invention has no special limitation on the proportion of different curing agents, and the curing agents can be prepared in any proportion.
In the invention, the cardanol modified hexamethylene diamine is preferably prepared by reacting cardanol, formaldehyde and hexamethylene diamine through a MANNICH reaction; the preparation method of the cardanol modified hexamethylene diamine preferably comprises the following steps: mixing 302.5g of cardanol and 144.25g of hexamethylenediamine under the condition of continuous stirring, heating to 80 ℃, adding 39g of paraformaldehyde in portions, controlling the reaction temperature to be 80-95 ℃, reacting for 2 hours, and removing water generated by the reaction under the vacuum condition to obtain cardanol modified hexamethylenediamine. The process of adding paraformaldehyde in portions is not particularly limited in the invention, and the process is well known in the art. The cardanol side chain carried by the cardanol modified hexamethylene diamine can provide excellent water resistance and flexibility.
In the invention, the cashew phenolic aldehyde amide curing agent is preferably at least one of NX 3040, NX 1544 and NX 3060; the cashew phenolic amide curing agent integrates the advantages of polyamide and phenolic amine systems, and can provide excellent water resistance, adhesive force and flexibility in a high-humidity environment.
In the present invention, the polyetheramine curing agent is preferably D230 and/or D403. The polyether amine curing agent has a long carbon chain structure, can improve the flexibility and the impact resistance, and can also play a role in adjusting the viscosity and the curing speed.
In the present invention, the mass ratio of the first component to the second component is preferably 1 (0.5 to 0.8), more preferably 1 (0.6 to 0.7).
The preparation method of the epoxy adhesive capable of being constructed with water is not particularly limited, and the raw materials corresponding to the first component and the second component are respectively and uniformly mixed according to the well-known process in the field, then the first component and the second component are poured into a mixing barrel according to the required proportion, and the epoxy adhesive is obtained after uniform stirring.
The invention provides the application of the epoxy adhesive capable of being constructed with water in the technical scheme as an adhesive for paving thin layers of road and bridge surfaces under the working condition of humidity or water. The method of the present invention is not particularly limited, and the method may be applied according to a method known in the art.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the preparation method of the cardanol modified hexamethylenediamine used was: mixing 302.5g of cardanol and 144.25g of hexamethylenediamine under the condition of continuous stirring, heating to 80 ℃, adding 39g of paraformaldehyde in portions, controlling the reaction temperature to be 80-95 ℃, reacting for 2 hours, and removing water generated by the reaction under the vacuum condition to obtain the cardanol modified hexamethylenediamine curing agent.
Example 1
The epoxy adhesive comprises the following components:
a first component:
a second component:
weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Example 2
The epoxy adhesive comprises the following components:
a first component:
a second component:
weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Example 3
The epoxy adhesive comprises the following components:
a first component:
a second component:
DMP-30 parts by mass
72 parts by mass of cardanol modified hexamethylene diamine
Polyetheramine D230 parts by mass
Weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Example 4
The epoxy adhesive comprises the following components:
a first component:
a second component:
weighing various raw materials according to the mass ratio, firstly pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Example 5
The epoxy adhesive comprises the following components:
a first component:
a second component:
weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Example 6
The epoxy adhesive comprises the following components:
a first component:
a second component:
weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Comparative example 1
Commercial product Pro-poxy TM The glue for the Type III Dot epoxy thin-layer paving material comprises two components of AB, pro-poxy TM The A, B component of Type III Dot epoxy thin layer paving material is proportioned and uniformly mixed according to the specification requirement.
Comparative example 2
The epoxy adhesive comprises the following components:
a first component:
a second component:
DMP-30.5 parts by mass
Polyetheramine D403 parts by mass
Cashew phenolic amide NX 3060.5 parts by mass
Weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Comparative example 3
The epoxy adhesive comprises the following components:
a first component:
a second component:
DMP-30 parts by mass
Polyetheramine D403 (30 parts by mass)
Modified alicyclic amine curing agent H6308 60 parts by mass
Weighing various raw materials according to the mass ratio, pouring the first component and the second component into a mixing barrel according to the mass ratio of 1.
Performance test
1) Wet mortar block adhesion test: the mortar block (size 70 x 30mm) was soaked in water for 48h to ensure complete wetting of the mortar block. Glue solutions are respectively prepared according to the proportion of the embodiments 1-3 and the comparative examples 1-3, the mixed glue solutions are uniformly smeared on the bonding area of the wet mortar block, the steel joint is aligned and bonded to obtain a mortar block bonding sample, the mortar block bonding sample is maintained for 72 hours, the bonding strength of the obtained mortar block is detected according to a GB/T16777-2008 method, and the obtained result is shown in Table 1.
Table 1 bond wet mortar block pull test results
2) Underwater curing tensile shear test: according to the method recorded in GB/T7124-2008, steel sheets and steel sheets are soaked in water and taken out, epoxy adhesive glue solutions prepared in examples 1-3 and comparative examples 1-3 are smeared on a bonding area and are well bonded, the obtained steel-steel tensile shear test sample is immediately and completely soaked in water, after the steel-steel tensile shear test sample is cured for 72 hours, the steel-steel tensile shear strength is measured according to GB/T7124-2008, and the obtained result is shown in Table 2.
TABLE 2 Underwater tensile shear Strength
As can be seen from tables 1 and 2, the epoxy adhesive prepared by the invention has good underwater curing performance, the bonding strength of the wet mortar blocks of the examples 1 to 3 is more than 2.5MPa, and the failure forms are concrete failure, while the bonding strength of the comparative example 2 is only 1.47MPa and is interfacial failure, and the comparative example 3 is only 0.95MPa and is interfacial failure; the tensile and shear strength of the underwater curing of the examples 1 to 3 is more than 13MPa, while the tensile and shear strength of the comparative examples 1, 2 and 3 is only close to 10MPa.
3) Boiling aging test: respectively preparing a mortar block bonding sample and a steel-steel tension-shear sample according to the methods 1) and 2), respectively curing for 72 hours, boiling the obtained cured samples in water at 80 ℃ for 7 days, and detecting the changes of the mortar block bonding strength and the tensile shear strength of the samples, wherein the obtained results are shown in Table 3.
TABLE 3 Water boil aging test
Note: * The interface damage means that the damage occurs on the mortar block and the adhesive bonding surface.
As can be seen from Table 3, the epoxy adhesive prepared by the invention still has good high-temperature boiling resistance in a humid/underwater curing environment, after the mortar block samples prepared in the examples 1-3 are boiled in hot water at 80 ℃ for 7 days, the bonding strength of more than 2MPa is still maintained, the failure modes are concrete failure, and the strength of the comparative example 2 after aging is only 1MPa; the tensile and shear strength of the tensile and shear samples of examples 1 to 3 is not changed greatly after the samples are boiled in hot water at 80 ℃ for 7d, the tensile and shear strength of example 1 is even slightly improved, and the tensile and shear strength of comparative examples 1, 2 and 3 are greatly reduced after aging.
4) The tensile strength and elongation at break of the epoxy adhesives prepared in the different cases were measured according to the method described in GB/T1040.3-2006, the gel time of the different epoxy adhesives was measured according to the method described in ASTM C881-13, and the results are shown in Table 4.
TABLE 4 gel time and mechanical Properties of epoxy cements
As can be seen from Table 4, the epoxy adhesive prepared by the invention has the characteristics of high strength and good flexibility, and the gel time is more than 20min, which indicates that the operation time is long. As in example 3, the gel time of the epoxy adhesive was 35min, the tensile strength reached 20.7MPa, and the elongation was 71.5%. While the gel time of comparative example 1 was only 15min, and the tensile strength and elongation were also only 16.9MPa and 49.8%, respectively; comparative examples 2 and 3 had a long gel time, but both the strength and the elongation were significantly low.
The epoxy adhesive prepared by the invention has the characteristics of excellent mechanical property, good flexibility, high-temperature boiling resistance, capability of being cured in a humid/underwater environment and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The epoxy adhesive capable of being constructed with water is characterized by comprising a first component and a second component which are independently packaged in parts by mass; the first component comprises 100 parts of epoxy resin, 5 to 20 parts of toughening agent, 5 to 30 parts of active diluent and 0.5 to 2 parts of adhesion promoter;
the adhesion promoter is an epoxy silane-containing compound and/or an isocyanate silane-containing compound; the toughening agent is epoxy-terminated polyurethane;
the second component comprises 2 to 10 parts of curing accelerator and 90 to 98 parts of curing agent;
the curing agent is cardanol modified hexamethylene diamine, a cardanol phenolic amide curing agent and a polyether amine curing agent;
the reactive diluent is one or more of polypropylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether and hexanediol diglycidyl ether.
2. The epoxy adhesive as claimed in claim 1, wherein the mass ratio of the first component to the second component is 1 (0.5 to 0.8).
3. The epoxy adhesive of claim 1 or 2, wherein the epoxy resin is a bisphenol a type epoxy resin and/or a cycloaliphatic epoxy resin; when the epoxy resin is bisphenol A type epoxy resin and alicyclic epoxy resin, the mass ratio of the bisphenol A type epoxy resin to the alicyclic epoxy resin is (60 to 95): (5 to 40).
4. The epoxy adhesive of claim 1, wherein the epoxy-terminated polyurethane is NPER-133L and/or QS-P24F.
5. The epoxy adhesive of claim 1 or 2, wherein the curing accelerator is a tertiary amine accelerator.
6. The epoxy adhesive according to claim 5, wherein the cardanol modified hexamethylene diamine is prepared by reacting cardanol, formaldehyde and hexamethylene diamine through a MANNICH reaction; the cashew phenolic aldehyde amide curing agent is at least one of NX 3040, NX 1544 and NX 3060; the polyether amine curing agent is D230 and/or D403.
7. The use of the water-processable epoxy adhesive of any one of claims 1~6 as an adhesive for paving thin layers of road and bridge surfaces in wet or wet conditions.
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| CN115260961B (en) * | 2022-08-23 | 2024-05-10 | 江苏大力士投资有限公司 | Epoxy adhesive with low amine value and high filler and preparation method thereof |
| CN117550984B (en) * | 2024-01-12 | 2024-04-19 | 长春中科赫帝森材料科技有限公司 | Polyether amine curing agent, epoxy resin curing material, preparation method and application thereof |
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| CN106495562A (en) * | 2016-09-23 | 2017-03-15 | 广东省建筑科学研究院集团股份有限公司 | A kind of cold painting type road and bridge face thin layer pavement material for adapting to southern warm and its using method |
| CN106634758A (en) * | 2016-09-23 | 2017-05-10 | 广东省建筑科学研究院集团股份有限公司 | Anti-aging epoxy adhesive and application thereof |
| CN109627686A (en) * | 2018-10-29 | 2019-04-16 | 广东建科交通工程质量检测中心有限公司 | A kind of thin layer pavement material and preparation method thereof suitable for moist road and bridge face |
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| CN113795561B (en) * | 2019-05-06 | 2022-08-02 | 中路交科科技股份有限公司 | Fatigue-resistant cold-mixed epoxy resin material, preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106495562A (en) * | 2016-09-23 | 2017-03-15 | 广东省建筑科学研究院集团股份有限公司 | A kind of cold painting type road and bridge face thin layer pavement material for adapting to southern warm and its using method |
| CN106634758A (en) * | 2016-09-23 | 2017-05-10 | 广东省建筑科学研究院集团股份有限公司 | Anti-aging epoxy adhesive and application thereof |
| CN109627686A (en) * | 2018-10-29 | 2019-04-16 | 广东建科交通工程质量检测中心有限公司 | A kind of thin layer pavement material and preparation method thereof suitable for moist road and bridge face |
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