CN114133912B - Bi-component silicone structural adhesive with strong initial adhesion - Google Patents

Bi-component silicone structural adhesive with strong initial adhesion Download PDF

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Publication number
CN114133912B
CN114133912B CN202111428637.7A CN202111428637A CN114133912B CN 114133912 B CN114133912 B CN 114133912B CN 202111428637 A CN202111428637 A CN 202111428637A CN 114133912 B CN114133912 B CN 114133912B
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parts
component
base material
stirring
structural adhesive
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CN114133912A (en
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胡帅
蒋金博
范海健
罗银
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Guangzhou Baiyun Chemical Industry Co Ltd
Guangdong Baiyun Technology Co Ltd
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Guangzhou Baiyun Chemical Industry Co Ltd
Guangdong Baiyun Technology Co Ltd
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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
    • C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
    • C09J183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a double-component silicone structural adhesive with strong initial adhesion, which comprises a component A and a component B: the component A consists of 20-60 wt% of alpha, omega-dihydroxy polydimethylsiloxane, 2-10 wt% of silicone oil and 40-60 wt% of filler. The component B consists of 10-30wt% of simethicone, 30-50wt% of reinforcing filler, 10-30wt% of cross-linking agent, 10-30wt% of coupling agent and 0.01-0.5wt% of catalyst, wherein the coupling agent is compounded and activated by adopting two types of coupling agents. Compared with the traditional silicone structural adhesive, the adhesive has stronger initial adhesive force, higher curing speed and short stretch-break and surface drying time, can meet the various requirements of special buildings, automobiles, electronic appliances and the like, can shorten positioning and curing time, quickens process flow and improves process efficiency.

Description

Bi-component silicone structural adhesive with strong initial adhesion
Technical Field
The invention relates to the technical field of viscose, in particular to a strong primary adhesion bi-component silicone structural adhesive.
Background
The silicone structural adhesive has the characteristics of high strength, high load bearing capacity, aging resistance, fatigue resistance and corrosion resistance, has wide application in the bonding aspect of metal, ceramic, plastic, rubber, wood and other similar materials or different materials, is simple and convenient to construct, saves time and does not damage the original structure. However, silicone structural adhesives also have disadvantages, in which low initial adhesion, slow curing speed, and long curing time are the biggest problems.
The initial adhesion generally refers to initial surface adhesion between articles, and is generally weak within 3-24 hours after the construction of the two-component silicone structural adhesive is completed. Meanwhile, if the bonding force is formed for too long, the construction time is long, the bonded material is easy to deform in the moving process in the curing time, the bonding effect is invalid, the production efficiency of workshops is influenced, and the production cost is increased.
Therefore, the bi-component silicone structural adhesive is developed, so that the bi-component silicone structural adhesive has stronger initial adhesive force, can be cured quickly, has excellent long-term stability in the aspects of comprehensive properties such as mechanical strength, adhesive property and the like, can improve the service scene and construction efficiency of the bi-component silicone structural adhesive, and brings good economic benefit.
Disclosure of Invention
Aiming at the requirements of the prior art and practical application, the invention provides the double-component silicone structural adhesive with strong initial adhesion, which has strong initial adhesion, can be rapidly cured, has excellent long-term stability in the aspects of comprehensive properties such as mechanical strength, adhesive property and the like, and solves the problems of low initial adhesion, low curing speed and long curing time of the silicone structural adhesive.
The silicone structural adhesive provided by the invention comprises a component A and a component B: the component A consists of alpha, omega-dihydroxy polydimethylsiloxane 40-60 wt%, silicone oil 2-10 wt% and stuffing 30-50 wt%. The component B consists of 10 to 30 weight percent of simethicone, 30 to 50 weight percent of reinforcing filler, 10 to 30 weight percent of cross-linking agent, 10 to 30 weight percent of compound coupling agent and 0.01 to 0.5 weight percent of catalyst.
The compound coupling agent consists of a coupling agent A and a coupling agent B, wherein the ratio of the coupling agent A to the coupling agent B is not lower than 20%.
The coupling agent A is at least one of bis [3- (trimethoxy silicon) -propyl ] amine, gamma-glycidoxypropyl trimethoxy silane, gamma-glycidoxypropyl triethoxy silane, epoxycyclohexylmethyl dimethoxy silane, epoxycyclohexylmethyl diethoxy silane, 3-chloropropyl trimethoxy silane, 3-chloropropyl triethoxy silane and gamma- (2, 3-epoxypropoxy) propyl trimethoxy siloxane.
The coupling agent B is at least one of N-butyl aminopropyl trimethoxy silane, gamma-aminopropyl triethoxy silane, gamma-aminopropyl methyl dimethoxy silane, gamma-aminopropyl methyl diethoxy silane, N- (2-aminoethyl) -3-aminopropyl trimethoxy silane, N- (2-aminoethyl) -3-aminopropyl triethoxy silane, N- (2-aminoethyl) -3-aminopropyl methyl dimethoxy silane, N- (2-aminoethyl) -3-aminopropyl methyl diethoxy silane, anilinomethyl trimethoxy silane, anilinomethyl triethoxy silane and divinyl triaminopropyl trimethoxy silane.
The cross-linking agent is two or more of tetraethoxysilane, polyethyl silicate, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, polymethyltriethoxysilane oligomer, phenyltrimethoxysilane, phenyltriethoxysilane, methylphenyldimethoxysilane, methylphenyldiethoxysilane, octyltrimethoxysilane, tetramethoxysilane, 1, 2-bis (trimethoxysilyl) ethane, diphenyldimethoxysilane and diphenyldiethoxysilane.
The cross-linking agent and the compound agent are activated for 10-100 hours after being stirred and heated to 50-100 ℃.
The viscosity of the d, omega-dihydroxy polydimethylsiloxane is 5000-100000 cs; the viscosity of the simethicone is 1000-15000 cs.
The filler is formed by mixing one or more of active calcium carbonate with the particle size of 10-40 nm and resin according to any proportion.
The resin is one or a mixture of more of mushroom vinyl resin, rosin resin and petroleum resin.
The active calcium carbonate is calcium carbonate with the surface treated by one or more of octamethyl cyclotetrasiloxane, hexamethyldisilazane, dimethyl dichlorosilane, rosin, fatty acid and stearic acid.
The reinforcing filler is formed by mixing one or two of carbon black or gas-phase white carbon black with the particle size of 0.3-10 nm.
The catalyst may be dibutyltin dilaurate, dibutyltin diacetate, dioctyltin dilaurate, monobutyl tin hydroxide or stannous octoate.
Detailed Description
When the following examples are used, the components A and B are uniformly mixed according to the volume ratio of 10:1, and then are coated on the surface of the cleaned material to be bonded in an extrusion mode, then the structural adhesive is scraped to a thickness of 6mm by a scraper, the structural adhesive is cured for 30min at room temperature, and then primary adhesion test is carried out on the structural adhesive, and a weight with a certain mass is hung on the structural adhesive to observe the bearing capacity of the structural adhesive. And secondly, after curing for 12 hours under standard conditions, measuring the tensile shear strength according to the test conditions of GB/T7124-2008.
Each comparative example and example scheme is listed below:
b component scheme Silicone oil Crosslinking agent Coupling agent Reflow process
Comparative example 1 3000mPa·s Single Single Without any means for
Comparative example 2 3000mPa·s Single Single Without any means for
Comparative example 3 3000mPa·s Single Single Without any means for
Comparative example 4 3000mPa·s Compounding Compounding Without any means for
Comparative example 5 3000mPa·s Compounding Compounding Has the following components
Example 1 10000mPa·s Compounding Compounding Has the following components
Example 2 13000mPa·s Compounding Compounding Has the following components
Example 3 10000mPa·s Compounding Compounding Has the following components
Example 4 13000mPa·s Compounding Compounding Has the following components
Comparative example 1:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 10000 mPas, adding 10 parts of 400 mPas dimethyl silicone oil into a kneader, stirring and dispersing, adding 100 parts of 70 nm-particle-size nano active calcium carbonate into the mixture in the stirring process after 5 minutes to enable the powder to be completely covered by the glue to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1 hour to obtain a base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, adding 100 parts of 3000 mPa.s dimethyl silicone oil and 100 parts of carbon black into a planetary machine, stirring in vacuum, keeping the temperature at 100 ℃ for 30min to obtain a base material B, adding 50 parts of propyl trimethoxysilane and 50 parts of 3-isocyanatopropyl trimethoxysilane, adding 1 part of catalyst, and stirring for 20min under the protection of nitrogen to obtain the base material.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Comparative example 2:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 10000 mPas, adding 10 parts of 400 mPas dimethyl silicone oil into a kneader, stirring and dispersing, adding 100 parts of 40 nm-particle-size nano active calcium carbonate into the mixture in the stirring process after 5 minutes to enable the powder to be completely covered by the glue to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1 hour to obtain a base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, adding 100 parts of 3000 mPa.s dimethyl silicone oil and 100 parts of carbon black into a planetary machine, stirring in vacuum, keeping the temperature at 100 ℃ for 30min to obtain a base material B, adding 50 parts of propyl trimethoxysilane and 50 parts of 3-isocyanatopropyl trimethoxysilane, adding 1 part of catalyst, and stirring for 20min under the protection of nitrogen to obtain the base material.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Comparative example 3:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 10000 mPas, adding 10 parts of 400 mPas dimethyl silicone oil into a kneader, stirring and dispersing, adding 95 parts of 40 nm-particle-size nano active calcium carbonate and 5 parts of rosin resin into the mixture in the stirring process after 5 minutes, so that the powder is completely covered by the glue to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1h to obtain the base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, adding 100 parts of 3000 mPa.s dimethyl silicone oil and 100 parts of carbon black into a planetary machine, stirring in vacuum, keeping the temperature at 100 ℃ for 30min to obtain a base material B, adding 50 parts of propyl trimethoxysilane and 50 parts of 3-isocyanatopropyl trimethoxysilane, adding 1 part of catalyst, and stirring for 20min under the protection of nitrogen to obtain the base material.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Comparative example 4:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 10000 mPas, adding 10 parts of 400 mPas dimethyl silicone oil into a kneader, stirring and dispersing, adding 100 parts of 30 nm-particle-size nano active calcium carbonate into the mixture in the stirring process after 5 minutes to enable the powder to be completely covered by the glue to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1 hour to obtain a base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, 100 parts of 10000 mPa.s dimethyl silicone oil and 100 parts of carbon black are added into a planetary machine for vacuum stirring, the temperature is stabilized at 100 ℃ and kept for 30min to obtain a base material B, then 20 parts of polymethyl triethoxysilane, 30 parts of propyl trimethoxysilane, 30 parts of gamma-aminopropyl trimethoxysilane and 10 parts of epoxy cyclohexyl methyl diethoxysilane are added, and then 1 part of catalyst is added for stirring for 20min under the protection of nitrogen.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Comparative example 5:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 10000 mPas, adding 10 parts of 400 mPas dimethyl silicone oil into a kneader, stirring and dispersing, adding 100 parts of 30 nm-particle-size nano active calcium carbonate into the mixture in the stirring process after 5 minutes to enable the powder to be completely covered by the glue to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1 hour to obtain a base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, 100 parts of 10000 mPa.s dimethyl silicone oil and 100 parts of carbon black are added into a planetary machine to be stirred in vacuum, the temperature is stabilized at 100 ℃ and kept for 30min to obtain a base material B, then 20 parts of polymethyl triethoxysilane, 30 parts of propyl trimethoxysilane, 30 parts of gamma-aminopropyl trimethoxysilane and 10 parts of epoxy cyclohexyl methyl diethoxysilane which are activated for 50h at 60 ℃ are added, and then 1 part of catalyst is added to be stirred for 20min under the protection of nitrogen to obtain the base material B.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Example 1:
the component A (weight fraction): 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 20000 mPas is taken, then 10 parts of 400 mPas simethicone is added into a kneader for stirring and dispersing, 95 parts of nano active calcium carbonate with the particle size of 20nm and 5 parts of mushroom vinyl resin are added into the mixture in the stirring process after 5 minutes, so that the powder is completely covered by the glue to form a self-leveling base material, the reaction temperature is controlled to be 100 ℃, and the base material A is obtained after mixing for 1 hour, and grinding is carried out for later use.
The component B (weight fraction): according to the proportion of the component B, 100 parts of 10000 mPa.s dimethyl silicone oil and 100 parts of carbon black are added into a planetary machine for vacuum stirring, the temperature is stabilized at 100 ℃ and kept for 30min to obtain a base material B, then 20 parts of methyltrimethoxysilane, 30 parts of propyl orthosilicate, 30 parts of N-butylaminopropyl trimethoxysilane and 20 parts of gamma-glycidoxypropyl trimethoxysilane are added after activation for 50h at 70 ℃, and then 1 part of catalyst is added for stirring for 20min under the protection of nitrogen.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Example 2:
the component A (weight fraction): 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 20000 mPas is taken, then 10 parts of 400 mPas simethicone is added into a kneader for stirring and dispersing, 90 parts of nano active calcium carbonate with the particle size of 20nm and 10 parts of rosin resin are added into the mixture in the stirring process after 5 minutes, so that the powder is completely covered by the adhesive to form a self-leveling base material, the reaction temperature is controlled to be 100 ℃, and the base material A is obtained after mixing for 1 hour, and grinding is carried out for later use.
The component B (weight fraction): according to the proportion of the component B, adding 100 parts of 13000 mPa.s dimethyl silicone oil and 100 parts of carbon black into a planetary machine, stirring in vacuum, keeping the temperature at 100 ℃ for 30min to obtain a base material B, adding 20 parts of methyltrimethoxysilane, 30 parts of propyl orthosilicate, 30 parts of N-butylaminopropyl trimethoxysilane and 20 parts of gamma-glycidoxypropyl trimethoxysilane after activation for 50h at 90 ℃, adding 1 part of catalyst, and stirring for 20min under the protection of nitrogen to obtain the modified silicone.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Example 3:
the component A (weight fraction): taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 60000 mPas, adding 2 parts of 400 mPas and 8 parts of 1000 mPas of simethicone into a kneader for stirring and dispersing, adding 85 parts of 20 nm-particle-size nano active calcium carbonate and 15 parts of petroleum resin into the mixture in the stirring process after 5min to enable the glue to completely cover the powder to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1h to obtain the base material A, and grinding for later use.
The component B (weight fraction): according to the proportion of the component B, 100 parts of 10000 mPa.s dimethyl silicone oil and 100 parts of carbon black are added into a planetary machine for vacuum stirring, the temperature is stabilized at 100 ℃ and kept for 30min to obtain a base material B, 10 parts of tetramethoxysilane, 20 parts of octyl trimethoxysilane, 40 parts of N- (2-aminoethyl) -3-aminopropyl triethoxysilane and 20 parts of divinyl triaminopropyl trimethoxysilane are added after the base material B is activated at 70 ℃ for 72h, and then 1 part of catalyst is added for stirring for 20min under the protection of nitrogen.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
Example 4:
the component A (weight fraction): 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 20000 mpa.s is taken, then 10 parts of 400 mpa.s simethicone is added into a kneader for stirring and dispersing, 90 parts of nano active calcium carbonate with the particle size of 20nm and 10 parts of rosin resin are added into the mixture in the stirring process after 5 minutes, so that the powder is completely covered by the glue to form a self-leveling base material, the reaction temperature is controlled to be 100 ℃, and the base material A is obtained after mixing for 1 hour, and grinding is carried out for later use.
The component B (weight fraction): according to the proportion of the component B, 100 parts of 13000 mPa.s dimethyl silicone oil and 100 parts of carbon black are added into a planetary machine for vacuum stirring, the temperature is stabilized at 100 ℃ and kept for 30min to obtain a base material B, 30 parts of methylphenyl dimethoxy silane, 20 parts of diphenyl dimethoxy silane, 30 parts of gamma-glycidol ether oxypropyl triethoxy silane and 40 parts of N- (2-aminoethyl) -3-aminopropyl methyl diethoxy silane after being activated for 72h at 90 ℃ are added, and then 1 part of catalyst is added for stirring for 20min under the protection of nitrogen.
And then the component A and the component B are vacuumized and uniformly mixed in a planetary mixer according to the mixing volume ratio of 10:1, and tested according to the conditions.
The test results of each comparative example and each example are as follows:
from the results, compared with the traditional silicone structural adhesive, the two-component silicone structural adhesive provided by the invention has stronger initial adhesive force, faster curing speed and short stretch-break and surface drying time, can meet the various requirements of special buildings, automobiles, electronic appliances and the like, can shorten positioning and curing time, quicken process flow and improve process efficiency.
The technical description and the beneficial effects of the invention are as follows:
1. the invention expands the application range of the silicone structural adhesive and has good economic value.
2. The invention aims at improving the defect of low initial adhesive force and performance of the existing double-component silicone structural adhesive product, and obviously improves the initial adhesive force.
3. The silicone sealant disclosed by the invention has good weather resistance and is suitable for long-term use. The preparation process is simple, and conventional production equipment is used.
4. The invention can improve the shearing strength of the cross-linking agent and the coupling agent by activating the cross-linking agent and the coupling agent, and can balance the reactivity of the cross-linking agent and the coupling agent by selecting two types of coupling agents with different activities for compounding, can adjust the curing rate of the cross-linking agent and the coupling agent to achieve effective bonding, and can improve the comprehensive performance of products.

Claims (1)

1. The application of the two-component silicone structural adhesive in improving the initial adhesion is characterized in that the two-component silicone structural adhesive comprises an A component and a B component; the component A is prepared by the following method: taking 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity of 60000 mPas, adding 2 parts of 400 mPas and 8 parts of 1000 mPas of simethicone into a kneader for stirring and dispersing, adding 85 parts of 20 nm-particle-size nano active calcium carbonate and 15 parts of petroleum resin into the mixture in the stirring process after 5min to enable the glue to completely cover the powder to form a self-leveling base material, controlling the reaction temperature to be 100 ℃, mixing for 1h to obtain a base material A, and grinding for later use; the component B is prepared by the following method: adding 100 parts of 10000 mPa.s simethicone and 100 parts of carbon black into a planetary machine for vacuum stirring, keeping the temperature at 100 ℃ for 30min to obtain a base material B, adding 10 parts of tetramethoxysilane, 20 parts of octyl trimethoxysilane, 40 parts of N- (2-aminoethyl) -3-aminopropyl triethoxysilane and 20 parts of divinyl triaminopropyl trimethoxysilane after the base material B is activated at 70 ℃ for 72h, adding 1 part of catalyst, and stirring for 20min under the protection of nitrogen to obtain the catalyst; and vacuumizing and uniformly mixing the component A and the component B in a planetary mixer according to the mixing volume ratio of 10:1, wherein the contents of the components are in parts by weight.
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CN108047968A (en) * 2017-12-04 2018-05-18 杭州福斯特应用材料股份有限公司 A kind of high volume resistivity structural silicone adhesive of low modulus
CN109609083A (en) * 2018-12-24 2019-04-12 成都硅宝新材料有限公司 A kind of solar light-heat power-generation two-component structural silicone glue and preparation method thereof
CN112143446A (en) * 2020-08-24 2020-12-29 广州集泰化工股份有限公司 Bi-component silicone sealant and preparation method and application thereof
CN113684003A (en) * 2021-09-03 2021-11-23 广州市白云化工实业有限公司 Bi-component room temperature vulcanized silicone rubber composition

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