High-temperature-resistant anchoring glue and preparation method thereof

Abstract

The invention relates to the technical field of anchoring, and discloses a high-temperature-resistant anchoring adhesive which comprises the following material components in parts by weight: 20-30 parts of rubber filling particles; 40-50 parts of novel high-temperature-resistant elastic resin; the rubber filling particles comprise silicon rubber, graphite, dicumyl peroxide, talcum powder and diphenylamine and are uniformly plasticized and mixed on a double-roller open mill, and the rubber filling particles comprise 100 parts of silicon rubber, 20-30 parts of graphite, 2-5 parts of dicumyl peroxide, 10-20 parts of talcum powder and 1-3 parts of diphenylamine and are uniformly plasticized and mixed on the double-roller open mill and are uniformly plasticized and mixed on a vulcanizing machine. The novel high-temperature-resistant elastic resin comprises styrene, benzoyl peroxide, toluene, an emulsifier and a flame retardant which are uniformly mixed through a stirrer. The novel high-temperature-resistant elastic resin can improve the bonding strength and durability of the anchoring glue, and can adapt to deformation and cracking of concrete or rocks, so that the anchoring reliability and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchoring, in particular to a high temperature resistant anchoring adhesive and a preparation method thereof. Background Art

[0002] In recent years, chemical anchor bolt anchoring technology has been widely used in building structure reinforcement, rail transit bracket handrail fixing, contact power grid fixing, etc. As a post-anchoring technology, it is simple and effective. It can achieve the fixing effect by using high-strength anchoring adhesive to make screws, steel bars, etc. have high-strength fixing and bonding force with concrete.

[0003] At present, the anchoring adhesives for chemical anchor bolts on the market are of varying quality. The strength index and bonding performance of some anchoring adhesives will be greatly reduced under high temperature conditions, causing them to loosen or even fall off in the concrete structure, failing to meet the requirements for the service life of structural bonding.

[0004] Therefore, inventors in the field have proposed a high temperature resistant anchoring adhesive and a preparation method thereof to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high temperature resistant anchoring adhesive and a preparation method thereof, which solves the problem that the strength index of the traditional anchoring adhesive decreases in a high temperature environment.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A high temperature resistant anchoring adhesive, calculated by weight fraction, includes the following material components:

[0007] 20-30 parts of rubber filling particles;

[0008] 40-50 parts of new high temperature resistant elastic resin;

[0009] 10-20 parts of curing agent.

[0010] Preferably, the rubber filling particles include silicone rubber, graphite, dicumyl peroxide, talcum powder, and diphenylamine, which are uniformly mixed by plasticizing on a double-roll mill and then prepared by a vulcanizer.

[0011] Preferably, the rubber filling particles include: 100 parts of silicone rubber, 20-30 parts of graphite, 2-5 parts of dicumyl peroxide, 10-20 parts of talc, and 1-3 parts of diphenylamine.

[0012] Preferably, the novel high temperature resistant elastic resin includes styrene, benzoyl peroxide, toluene, an emulsifier, and a flame retardant, which are evenly mixed by an agitator, and a polymerization reaction is initiated by a heating device, and a reaction kettle is used to contain the reaction materials.

[0013] Preferably, the novel high temperature resistant curable resin comprises: 50-80 parts of styrene, 0.5-2 parts of benzoyl peroxide, 10-30 parts of toluene, 1-5 parts of emulsifier, and 5-30 parts of flame retardant.

[0014] Preferably, the flame retardant is an expanded graphite flame retardant.

[0015] Preferably, the curing agent is a phenalkamine curing agent.

[0016] Preferably, a method for preparing a high temperature resistant anchoring adhesive comprises the following steps:

[0017] Step 1: preparation of rubber filling particles, preparation of new high temperature resistant elastic resin, and preparation of curing agent;

[0018] Step 2: Take a certain amount of rubber filling particles, new high temperature resistant elastic resin and curing agent and mix them.

[0019] Preferably, the method for preparing the rubber-filled particles comprises the following steps:

[0020] Step 1: Put the silicone rubber into the internal mixer and mix for 10-30 minutes;

[0021] Step 2: gradually add graphite, diisopropylbenzene peroxide, talcum powder and diphenylamine, and continue mixing for 10-20 minutes;

[0022] Step 3: Put the mixed materials into the open mill, make thin passes and triangle bags to make the materials evenly mixed. The opening time is 5-15 minutes;

[0023] Step 4: Put the material into the vulcanizer for vulcanization for 30-50 minutes;

[0024] Step 5: After vulcanization is completed, take out the product and perform shaping.

[0025] Preferably, the preparation method of the novel high temperature resistant elastic resin comprises the following steps:

[0026] Step 1: Evenly mix appropriate amounts of styrene, benzoyl peroxide, toluene and emulsifier to form an emulsion;

[0027] Step 2: Gradually add the flame retardant to the emulsion while stirring to ensure that it is evenly dispersed;

[0028] Step 3: Continue stirring for a while to fully mix the components;

[0029] Step 4: Adjust the pH value of the emulsion or add other additives as needed;

[0030] Step 5: subjecting the mixed emulsion to a polymerization reaction, which can be initiated by heating or adding an initiator;

[0031] Step 6: After the polymerization reaction is completed, an elastic resin is obtained.

[0032] The present invention provides a high temperature resistant anchoring adhesive and a preparation method thereof, which has the following beneficial effects:

[0033] 1. The present invention can improve the bonding strength and durability of the anchoring glue through the new high temperature resistant elastic resin, and can also adapt to the deformation and cracking of concrete or rock, thereby improving the reliability and safety of anchoring.

[0034] 2. The present invention can make the anchoring glue produce a certain expansion change at high temperature through rubber filling particles, thereby further enhancing the bonding performance between the anchoring glue and the wall. In addition, the wear resistance of the anchoring glue can be improved and its service life can be extended. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In recent years, chemical anchor bolt anchoring technology has been widely used in building structure reinforcement, rail transit bracket handrail fixing, contact power grid fixing, etc. As a post-anchoring technology, it is simple and effective. It can achieve the fixing effect by using high-strength anchoring adhesive to make screws, steel bars, etc. have high-strength fixing and bonding force with concrete.

[0037] At present, the anchoring adhesives for chemical anchor bolts on the market are of varying quality. The strength index and bonding performance of some anchoring adhesives will be greatly reduced under high temperature conditions, causing them to loosen or even fall off in the concrete structure, failing to meet the requirements for the service life of structural bonding.

[0038] According to a first aspect of the present invention, a high temperature resistant anchoring adhesive comprises the following material components by weight:

[0039] 20-30 parts of rubber filling particles;

[0040] 40-50 parts of new high temperature resistant elastic resin;

[0041] 10-20 parts of curing agent.

[0042] The rubber filling particles can make the anchoring glue produce a certain expansion change at high temperature, thereby further enhancing the bonding performance between the anchoring glue and the wall. In addition, the wear resistance of the anchoring glue can be improved and its service life can be extended.

[0043] The new high-temperature resistant elastic resin can improve the bonding strength and durability of the anchoring glue, while also being able to adapt to the deformation and cracking of concrete or rock, thereby improving the reliability and safety of the anchoring.

[0044] According to an embodiment of the present invention, the rubber filling particles include silicone rubber, graphite, dicumyl peroxide, talcum powder, and diphenylamine, which are uniformly mixed by plasticizing on a double-roll mill and prepared by a vulcanizer.

[0045] According to an embodiment of the present invention, it is characterized in that the rubber filling particles include: 100 parts of silicone rubber, 20-30 parts of graphite, 2-5 parts of dicumyl peroxide, 10-20 parts of talc, and 1-3 parts of diphenylamine.

[0046] According to an embodiment of the present invention, the silicone rubber may be 100 parts;

[0047] According to an embodiment of the present invention, graphite may be 20, 23, 26, or 30 parts;

[0048] According to an embodiment of the present invention, dicumyl peroxide may be 2, 3, 4, or 5 parts;

[0049] According to an embodiment of the present invention, talcum powder can be 10, 13, 16, or 20 parts;

[0050] According to an embodiment of the present invention, the amount of diphenylamine may be 1, 2, 2.5 or 3 parts.

[0051] According to an embodiment of the present invention, the novel high temperature resistant elastic resin includes styrene, benzoyl peroxide, toluene, an emulsifier, and a flame retardant, which are evenly mixed by an agitator, and a polymerization reaction is initiated by a heating device, and a reaction kettle is used to contain the reaction materials.

[0052] According to an embodiment of the present invention, the novel high temperature resistant curing resin includes: 50-80 parts of styrene, 0.5-2 parts of benzoyl peroxide, 10-30 parts of toluene, 1-5 parts of emulsifier, and 5-30 parts of flame retardant.

[0053] According to an embodiment of the present invention, styrene may be 50, 60, 70, or 80 parts;

[0054] According to an embodiment of the present invention, benzoyl peroxide may be 0.5, 1, 1.5, or 2 parts;

[0055] According to an embodiment of the present invention, toluene can be 10, 15, 25, or 30 parts;

[0056] According to an embodiment of the present invention, the emulsifier may be 1, 2, 3, 4, or 5 parts;

[0057] According to an embodiment of the present invention, the flame retardant may be 5, 10, 20, or 30 parts.

[0058] According to an embodiment of the present invention, the flame retardant is an expanded graphite flame retardant.

[0059] Expanded graphite flame retardant has high-efficiency flame retardant properties, can effectively inhibit combustion reactions, improve the fire resistance of elastic resins, and produces less smoke during combustion and is non-toxic and harmless.

[0060] According to an embodiment of the present invention, the curing agent is a phenalkamine curing agent.

[0061] Phenolic amine curing agent has good high temperature resistance and can maintain a stable curing effect at higher temperatures.

[0062] According to an embodiment of the present invention, a method for preparing a high temperature resistant anchoring adhesive comprises the following steps:

[0063] Step 1: preparation of rubber filling particles, preparation of new high temperature resistant elastic resin, and preparation of curing agent;

[0064] Step 2: Take a certain amount of rubber filling particles, new high temperature resistant elastic resin and curing agent and mix them.

[0065] According to an embodiment of the present invention, a method for preparing rubber-filled particles comprises the following steps:

[0066] Step 1: Put the silicone rubber into the internal mixer and mix for 10-30 minutes;

[0067] Step 2: gradually add graphite, diisopropylbenzene peroxide, talcum powder and diphenylamine, and continue mixing for 10-20 minutes;

[0068] Step 3: Put the mixed materials into the open mill, make thin passes and triangle bags to make the materials evenly mixed. The opening time is 5-15 minutes;

[0069] Step 4: Put the material into the vulcanizer for vulcanization for 30-50 minutes;

[0070] Step 5: After vulcanization is completed, take out the product and perform shaping.

[0071] According to an embodiment of the present invention, a method for preparing a novel high temperature resistant elastic resin comprises the following steps:

[0072] Step 1: Evenly mix appropriate amounts of styrene, benzoyl peroxide, toluene and emulsifier to form an emulsion;

[0073] Step 2: Gradually add the flame retardant to the emulsion while stirring to ensure that it is evenly dispersed;

[0074] Step 3: Continue stirring for a while to fully mix the components;

[0075] Step 4: Adjust the pH value of the emulsion or add other additives as needed;

[0076] Step 5: subjecting the mixed emulsion to a polymerization reaction, which can be initiated by heating or adding an initiator;

[0077] Step 6: After the polymerization reaction is completed, an elastic resin is obtained.

[0078] Embodiment 1:

[0079] A high temperature resistant anchoring adhesive is provided, wherein the rubber filling particles include the following components:

[0080] 100 parts of silicone rubber, 26 parts of graphite, 4 parts of dicumyl peroxide, 16 parts of talc, and 2 parts of diphenylamine.

[0081] The new high temperature resistant curing resin includes the following components:

[0082] 70 parts of styrene, 1.5 parts of benzoyl peroxide, 25 parts of toluene, 4 parts of emulsifier, and 20 parts of flame retardant.

[0083] The phenolic amine curing agent comprises 15 parts.

[0084] Embodiment 2:

[0085] The same as Example 1, except that the amount of graphite is 30 parts and the amount of diphenylamine is 2.5 parts.

[0086] Embodiment 3:

[0087] The same as Example 1, except that the amount of benzoyl peroxide is 1 part and the amount of flame retardant is 10 parts.

[0088] Comparative Example 1:

[0089] The preparation method is the same as that of Example 1, except that the silicone rubber is replaced by chloroprene rubber.

[0090] Comparative Example 2:

[0091] The preparation method is the same as that of Example 1, except that the expanded graphite flame retardant is not contained.

[0092] Comparative Example 3:

[0093] The preparation method is the same as that of Example 1, except that the flame retardant uses a polyamide curing agent.

[0094] Experimental example:

[0095] The high temperature resistant anchoring glue prepared by Examples 1-3 and Comparative Examples 1-3 was tested for performance indicators, including expansion coefficient, corrosion resistance, bonding strength and fire resistance. The high temperature resistant anchoring glue prepared by Examples 1-3 and Comparative Examples 1-3 was injected into a wall hole with a diameter of 2 cm and a depth of 20 cm, and then a steel bar with a length of 40 cm and a diameter of 1.8 cm was inserted. A universal testing machine was used to apply a gradually increasing tensile force to the steel bar until the steel bar broke or the steel bar was separated from the wall, and the maximum tensile force value was recorded; the mixed anchoring glue was applied to the wall bricks with a thickness of 2±0.2 cm, and the material was placed in a thermal expansion instrument to measure its length change at different temperatures, thereby calculating the expansion coefficient; the mixed and cured anchoring glue was immersed in a specific corrosive medium, and the surface changes of the material were regularly observed to evaluate its corrosion resistance; the mixed and cured anchoring glue was placed in a flame to burn, and the combustion conditions, burning time, flame propagation speed and other indicators were recorded to evaluate its fire resistance.

[0096] The test results are as follows.

[0097] Table 1. Performance test table of Examples 1-3 and Comparative Examples 1-3

[0098] project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Expansion coefficient 0.2％ 0.15％ 0.18％ 0.1％ 0.08％ 0.06％ Corrosion resistance 90％ 92％ 95％ 70％ 65％ 75％ Bond Strength 25MPa 28MPa 30MPa 15MPa 12MPa 18MPa Fire resistance 800℃ 850℃ 900℃ 600℃ 500℃ 650℃

[0099] It can be seen from the contents in Table 1 that Examples 1-3 can have relatively good properties in various tests. The high-temperature resistant anchoring glue provided by the present invention provides good heat resistance and aging resistance through silicone rubber; graphite increases the conductivity and wear resistance of the material; diisopropylbenzene peroxide is used as an initiator to promote the curing reaction; talcum powder improves the lubricity and wear resistance of the material; diphenylamine plays an antioxidant role; styrene provides good chemical resistance and mechanical properties; benzoyl peroxide is used as an initiator to promote the polymerization reaction; toluene is used to adjust the viscosity of the resin; the emulsifier helps the dispersion and stability of the resin; the expanded graphite flame retardant improves the flame retardant properties of the resin; the phenolic amine curing agent has good curing performance, high heat resistance, and good chemical corrosion resistance, so that the anchoring glue has high strength and stability after curing, and can resist the erosion of high temperature and chemicals to a certain extent.

[0100] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant anchoring adhesive, characterized in that: According to weight fraction, it includes the following material components: 20-30 parts of rubber filling particles; 40-50 parts of new high temperature resistant elastic resin; 10-20 parts of curing agent.

2. A high temperature resistant anchoring adhesive according to claim 1, characterized in that: The rubber filling particles include silicone rubber, graphite, dicumyl peroxide, talcum powder and diphenylamine, which are uniformly mixed by plasticizing on a double-roll mill and then prepared by a vulcanizer.

3. A high temperature resistant anchoring adhesive according to claim 1, characterized in that: The rubber filling particles include: 100 parts of silicone rubber, 20-30 parts of graphite, 2-5 parts of dicumyl peroxide, 10-20 parts of talc, and 1-3 parts of diphenylamine.

4. The high temperature resistant anchoring adhesive according to claim 1, characterized in that: The novel high-temperature resistant elastic resin includes styrene, benzoyl peroxide, toluene, an emulsifier, and a flame retardant, which are evenly mixed by a stirrer, and a polymerization reaction is initiated by a heating device, and a reaction kettle is used to contain the reaction materials.

5. The high temperature resistant anchoring adhesive according to claim 1, characterized in that: The novel high temperature resistant curing resin comprises: 50-80 parts of styrene, 0.5-2 parts of benzoyl peroxide, 10-30 parts of toluene, 1-5 parts of emulsifier and 5-30 parts of flame retardant.

6. A high temperature resistant anchoring adhesive according to claim 5, characterized in that: The flame retardant is an expanded graphite flame retardant.

7. The high temperature resistant anchoring adhesive according to claim 1, characterized in that: The curing agent is a phenalkamine curing agent.

8. The method for preparing a high temperature resistant anchoring adhesive according to claim 1, characterized in that: The following steps are involved: Step 1: preparation of rubber filling particles, preparation of new high temperature resistant elastic resin, and preparation of curing agent; Step 2: Take a certain amount of rubber filling particles, new high temperature resistant elastic resin and curing agent and mix them.

9. The method for preparing a high temperature resistant anchoring adhesive according to claim 8, characterized in that: The method for preparing the rubber-filled particles comprises the following steps: Step 1: Put the silicone rubber into the internal mixer and mix for 10-30 minutes; Step 2: gradually add graphite, diisopropylbenzene peroxide, talcum powder and diphenylamine, and continue mixing for 10-20 minutes; Step 3: Put the mixed materials into the open mill, make thin passes and triangle bags to make the materials evenly mixed. The opening time is 5-15 minutes; Step 4: Put the material into the vulcanizer for vulcanization for 30-50 minutes; Step 5: After vulcanization is completed, take out the product and perform shaping.

10. The method for preparing a high temperature resistant anchoring adhesive according to claim 8, characterized in that: The preparation method of the novel high temperature resistant elastic resin comprises the following steps: Step 1: Evenly mix appropriate amounts of styrene, benzoyl peroxide, toluene and emulsifier to form an emulsion; Step 2: Gradually add the flame retardant to the emulsion while stirring to ensure that it is evenly dispersed; Step 3: Continue stirring for a while to fully mix the components; Step 4: Adjust the pH value of the emulsion or add other additives as needed; Step 5: subjecting the mixed emulsion to a polymerization reaction, which can be initiated by heating or adding an initiator; Step 6: After the polymerization reaction is completed, an elastic resin is obtained.