A high temperature and high humidity resistant siloxane oligomer interface bonding agent composition and its preparation method and application

Abstract

The invention discloses a high-temperature and high-humidity siloxane oligomer interface bonding agent composition and a preparation method thereof. The preparation method comprises: A: adding a siloxane wetting dispersant to a low molecular weight polyether, heating and stirring, adding an amino or mercapto / silicate copolymerized siloxane oligomer, and then adding high specific surface area inorganic nanoparticles to disperse uniformly to obtain a dispersion system; B: dropping a hyperbranched polysiloxane unit into the dispersion system of step A under stirring conditions, stirring and dispersing uniformly to obtain a hyperbranched polysiloxane unit composite dispersion system; C: adding an α-type active alkyl copolymerized siloxane oligomer to the dispersion system of step B, dispersing uniformly to obtain the high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The preparation composition of the invention can enhance the high stability, high lifespan, high resistance to bulk damage, and high resistance to blistering of the polyether agent under high temperature and high humidity environments, and has low cost, and is easy for industrial production and popularization and application.

Description

Technical Field

[0001] The invention relates to the field of interface bonding control of moisture-curing siloxane modified polyether sealant materials, and in particular to a high-temperature and high-humidity resistant siloxane oligomer interface bonding agent composition for siloxane modified polyether sealant and metal, glass, concrete and plastic under high-temperature and high-humidity extreme environments and a preparation method thereof. Background Art

[0002] Siloxane modified polyether sealant materials are a type of polymer material containing polyether units and siloxane cross-linking units in their molecular structure. Due to the special structure, they have excellent aging resistance, anti-pollution, and re-coating properties. They are often bonded to organic and inorganic interfaces by physical hydrogen bonds and chemical point reactions. However, in high temperature and high humidity environments, interfacial bonding with metals, glass, concrete, plastics, etc. will rapidly destroy its bonding behavior. Therefore, when siloxane modified polyether sealants are bonded to metals, glass, concrete, plastics, etc., they must be treated with an interfacial bonding agent to achieve a strong bond between the two interfaces.

[0003] Affected by the extremely harsh high temperature and high humidity environment, due to the high polarity of the polyether unit, the siloxane-modified polyether sealant can easily form stable physical hydrogen bonds with water molecules under the hot and humid environment, thereby destroying the bonding between the siloxane-modified polyether sealant and metal, glass, concrete, plastic, etc. Therefore, in order to achieve good interfacial adhesion between the siloxane-modified polyether sealant and metal, glass, concrete, plastic, etc. under the extreme environment of high temperature and high humidity and achieve the bulk destruction of the interfacial bonding between the siloxane-modified polyether sealant and metal, glass, concrete, plastic, etc., the following three conditions must be met: (1) design polar bonding groups to form a strong surface bond with metal, glass, concrete, plastic, etc.; (2) make the interface regulator highly infiltrated with the interface of metal, glass, concrete, plastic, etc. to form a strong physical force; (3) the interface regulator forms an in-situ deposited micro-nano convex and concave transition layer on the surface of metal, glass, concrete, plastic, etc., giving the siloxane-modified polyether glue and its in-situ deposited micro-nano convex and concave transition layer a physical and chemical dual chelation. Traditional interface regulators rely on applying a first coat to achieve chemical bonding between part of the interface regulator and the interface, and then further apply a second coat to strengthen the interface. However, this method still has difficulty meeting the requirements of bonding between silicone-modified polyether sealants and metal, glass, concrete, plastic, etc. under high temperature and high humidity, and cannot achieve bulk destruction of stable bonding.

[0004] Silane coupling agent is a new type of functional organic intermediate that bridges polymers and inorganic materials. It uses the water vapor in the environment, the hydroxyl groups in the polymer or the hydroxyl groups at the organic / inorganic interface to realize the alkoxy hydrolysis / condensation of the silane coupling agent to achieve organic / inorganic chemical or physical bonding. However, the main feature of traditional silane coupling agents is that they contain trialkoxy or dialkoxy groups. When bonding with the organic / inorganic interface, it is necessary to have a large number of hydroxyl groups on its surface to achieve the chemical bonding of the network structure between the two. In high temperature and high humidity environments, it is difficult for the interface between siloxane-modified polyether sealants and metals, glass, concrete, plastics, etc. to form a large number of network structures, and it is even more difficult to achieve interfacial bonding or wetting between siloxane-modified polyether sealants and metals, glass, concrete, plastics, etc. In view of this technical difficulty, it is necessary to innovatively design a composite silane / siloxane in-situ nano-enhancement technology that has both in-situ deposition micro-nano convexoconcave functions, high wetting functions, and physical and chemical bonding functions. This is the key to solving the problem.

[0005] Chinese patent CN106893484B discloses a concrete interface regulator for siloxane-modified polyether adhesive, which uses polyester, alkyd resin and trialkoxysilane containing monoamino or diamino groups. Before use, the substrate is cleaned with a solvent, and the glass surface is primed to form a transition layer, forming a primary activation layer, and then a second primer is further applied to achieve in-situ bonding with the siloxane-modified polyether. However, the invention uses a polyether structure monomer to react with amino hydrogen to prepare an aminosiloxane with a polyether structure. The invention only prepares a polyester, alkyd resin and trialkoxysilane containing monoamino or diamino groups. The principle is to use a large number of hydroxyl groups on the concrete surface, which are easy to react with alkoxy groups to form silicon oxygen bonds, and at the same time, the affinity characteristics of the polyether are used to produce good physical entanglement with the polyether. This treatment method is difficult to achieve interfacial bonding or infiltration between polymers and metals, glass, concrete, plastics, etc. under high temperature and high humidity environments, and cannot meet the treatment of special interfaces.

[0006] Chinese patent CN103339163A discloses a viscosity-increasing composition, which mainly uses isocyanate trimer to react with siloxane to form a highly cross-linked siloxane compound, which is mainly suitable for the adhesion of adhesives and sealants on glass and ceramics. The defects of this method are: on the one hand, the high cross-linking degree of siloxane is used to achieve bonding reaction with polyhydroxy surfaces, but it will become brittle due to too high functional groups, the interfacial bonding reproducibility is poor, and the interface cleaning and activation are also required; on the other hand, the urethane ring in the molecular structure is conducive to the affinity with polyurethane glue and produces good physical entanglement. This method is also difficult to achieve interfacial bonding or infiltration between polyether glue and metal, glass, concrete, plastic, etc. under high temperature and high humidity environments, and cannot meet the treatment of special surfaces.

[0007] Chinese patent CN101573305A discloses a low-temperature adhesive primer composition, which mainly uses mercaptosilane, siloxane-modified isocyanate trimer, aminosilane and a composition of aminosilane and epoxy addition oligosiloxane. Compared with Chinese patent CN103339163A, this method greatly improves the bonding effect between the primer and the interface, on the one hand, improves the coordination effect between the interface regulator and the interface, and on the other hand, improves the wetting effect between the interface regulator and the polyurethane. Through these two improvements, it can be achieved without an activator, and only one primer is required. However, the invention has the problem that the interface regulator is difficult to form a micro-nano uneven chelating layer on the interface, which leads to water resistance, and can only obtain temporary body damage of more than 90%, but blistering for 1 to 2 days will cause cracking, especially in high temperature and high humidity environments, it is impossible to achieve interfacial bonding or wetting between polyether glue and metal, glass, concrete, plastic, etc.

[0008] In summary, there is an urgent need to develop and design an interface regulator product for siloxane-modified polyether sealant that can achieve bulk destruction with a single coating under harsh conditions of high temperature and high humidity. This has important research significance and application value in order to overcome the defects of use under harsh conditions. Summary of the invention

[0009] The purpose of the present invention is to overcome the defect or deficiency of the prior art siloxane-modified polyether sealant that cannot meet the defect of bulk destruction after one coating under harsh conditions of high temperature and high humidity, and to provide a high temperature and high humidity resistant siloxane oligomer interface bonding agent composition and its preparation method and application.

[0010] Another object of the present invention is to provide a preparation method and application of the above-mentioned high temperature and high humidity resistant siloxane oligomer interface bonding agent composition.

[0011] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0012] A high temperature and high humidity resistant siloxane oligomer interface bonding agent composition, which is composed of the following components in parts by mass:

[0013]

[0014] Existing patents often use aminosilanes with low molecular weight and above trifunctional groups, silane-modified isocyanate trimers, thiosilanes, and amino / epoxy addition siloxanes as interface regulators. Such interface regulators are well adapted to glass substrates with high hydroxyl active surfaces, metal substrates with high hydroxyl active surfaces, or silica-based surfaces with high hydroxyl active surfaces. Therefore, the common use of such interface regulators often requires a mode in which the high hydroxyl active surfaces are first activated and then primed. In addition, the use of cyano / thiol / polyether copolymerized siloxane oligomers, maleate-based alkoxysilanes, bridged urea-based / urethane-based alkoxysilanes, and acryloxyalkyl alkoxysilane compositions can solve the problem of regulating the low hydroxyl interface to achieve bulk destruction of the bond. However, it is difficult to use the above-mentioned siloxanes to achieve long-life and long-lasting interface bonding under high temperature and high humidity cyclic damage conditions for metal, glass, concrete, and plastic substrates.

[0015] The present invention is based on the structural characteristics of moisture-cured siloxane-modified polyether and the interface properties of metal, glass, concrete, and plastic, and selects a composite silane / siloxane in-situ nano-enhanced molecular-level high-temperature and high-humidity resistant siloxane oligomer interface bonding agent composition with in-situ deposition micro-nano convexoconcave function, high wetting function, and physical and chemical bonding function. The specific working principle is as follows:

[0016] (1) Since the interface bonding agent composition of the present invention contains hyperbranched polysiloxane units and α-type active alkyl copolymerized siloxane oligomer components, the combination of these two components can achieve a strong interfacial chemical bonding effect and a non-catalytic rapid crosslinking function between the interface bonding agent and metal, glass, concrete, and plastic; (2) The hyperbranched polysiloxane units in the interface bonding agent composition of the present invention not only impart physical entanglement effect and in-situ chemical bonding effect with metal, glass, concrete, and plastic, but also exert a mutual transmission network and polar affinity effect between the interface bonding agent and the siloxane-modified polyether adhesive; (3) The interface bonding agent composition of the present invention also contains amino or mercapto / silicate copolymerized siloxane oligomers, low molecular weight polyethers, and siloxane wetting and dispersing agent components. These components are used in combination to achieve a dual interfacial affinity effect with metal, glass, concrete, plastic, and moisture-cured siloxane-modified polyether adhesive, and can also achieve a dual interfacial affinity effect with the polyether adhesive The interface bonding agent composition of the present invention also contains amino or mercapto / silicate copolymerized siloxane oligomers, high specific surface area inorganic nanoparticles and siloxane wetting and dispersing agent components. These three components work synergistically to achieve nano-scale dispersion enhancement in the interface regulator, thereby forming a dense super-hydrophobic micro-nano uneven macro-lotus leaf rough surface on the interface, further enhancing the in-situ bonding enhancement between the siloxane-modified polyether glue and it, achieving the synergy between super-hydrophobicity, super-crosslinking and strong bonding, and achieving a long-term and efficient bulk destruction mechanism with high temperature and high humidity resistance and cyclic damage; (5) The siloxane wetting and dispersing agent component in the present invention can make the amino or mercapto / silicate copolymerized siloxane oligomers, high specific surface area inorganic nanoparticles and low molecular weight polyether uniformly dispersed in the interface regulator to form a super-hydrophobic nano-enhancement with a high inorganic content, and at the same time, it can also improve the high infiltration between the siloxane polyether glue and metal, glass, concrete and plastic.

[0017] The high temperature and high humidity resistant siloxane oligomer interface bonding agent composition provided by the present invention serves as an interface transition layer between siloxane modified polyether adhesive and metal, glass, concrete and plastic surfaces, has in-situ deposited micro-nano convexo-concave function, high wetting function, physical and chemical bonding function, excellent interface chemical bonding, in-situ bonding enhancement and long-term and efficient resistance to moisture and heat bulk destructiveness, can improve the long-term, high stability, high lifespan, high resistance to bulk destructiveness and high resistance to blistering of siloxane modified polyether adhesive under high temperature and high humidity on metal, glass, concrete and plastic, has low cost and is easy to industrialize and promote application.

[0018] It should be understood that the high temperature and high humidity resistant siloxane oligomer interface bonding agent composition of the present invention can achieve the same interface bonding effect when used for the interface between siloxane-modified polyether and conventional inorganic materials.

[0019] Preferably, the high temperature and high humidity resistant siloxane oligomer interface bonding agent composition is composed of the following components in parts by mass:

[0020]

[0021] Preferably, the amino or mercapto / silicate copolymerized siloxane oligomer has a structure as shown in Formula I:

[0022]

[0023] Wherein R1 and R are respectively C1-C4 alkyl groups; R2 is C1-C4 alkyl group or aryl group; X is primary amino group, secondary amino group, ethylenediamine group or mercapto group; a and b are respectively positive integers of 0-10 and 2≤a+b≤20.

[0024] Specifically, in the present invention, the C1-C4 alkyl group may be a methyl group, an ethyl group, a propyl group or a butyl group; and the aryl group may be a phenyl group.

[0025] More preferably, R1 is methyl.

[0026] More preferably, R is methyl or ethyl.

[0027] More preferably, R2 is propyl.

[0028] More preferably, X is CH3CH2CH2CH2-NH-, or NH2-CH2CH2NH-.

[0029] More preferably, a is 3, b is 7, and a+b=10, and the number average molecular weight Mn of the amino or mercapto / silicate copolymerized siloxane oligomer is 600-2000.

[0030] Preferably, the low molecular weight polyether is one of a linear copolymer of ethylene oxide and propylene oxide, a homopolymer of linear ethylene oxide, linear propylene oxide, or linear tetrahydrofuran ether, wherein the number average molecular weight of the low molecular weight polyether is in the range of 200 to 800.

[0031] More preferably, the low molecular weight polyether is a homopolymer of linear tetrahydrofuran ether, and the number average molecular weight ranges from 200 to 800.

[0032] Preferably, the molecular formula of the hyperbranched polysiloxane unit is as shown in Formula II:

[0033]

[0034] In formula II, R3 is a saturated straight or branched alkyl group with a carbon number of C1 to C4; p represents a positive integer of 20 to 80. More preferably, R3 is a methyl group, and p is 30.

[0035] Preferably, the molecular formula of the α-type active alkyl copolymerized siloxane oligomer is as shown in Formula III:

[0036]

[0037] In formula III, Y is NH, NH2CH2CH2NH or SH; R5 is a C1-C4 alkyl group; R4 is a C1-C 12 a and b are respectively positive integers of 0 to 10 and 2≤a+b≤20.

[0038] More preferably, X is NH2CH2CH2NH, R4 is C8 octyl, R5 is ethyl, a is 3, b is 7, and a+b=10.

[0039] Preferably, the inorganic nanoparticles with high specific surface area are one or a mixture of two or more of nano-silicon dioxide, nano-titanium dioxide and nano-calcium carbonate, wherein the specific surface area of ​​the inorganic nanoparticles with high specific surface area is 300-1200 nanometers.

[0040] More preferably, the high specific surface area inorganic nanoparticles are nano-silica aerogels, and the specific surface area is 1200.

[0041] Preferably, the silicone wetting and dispersing agent is one or a mixture of trimethylsilylpropylethylene oxide nonionic surfactant or cross-linked epoxy glycidyl ether silane nonionic surfactant.

[0042] More preferably, the silicone wetting and dispersing agent is cyclopropyloxy glycidyl ether propyl trimethoxy silane grafted propylene oxide nonionic polyether, and the molecular weight of cyclopropyloxy glycidyl ether propyl trimethoxy silane grafted propylene oxide nonionic polyether is 400. Its structural formula is as follows:

[0043]

[0044] The present invention also provides a method for preparing the high-temperature and high-humidity siloxane oligomer interface bonding agent composition, which comprises the following steps:

[0045] A: Add siloxane wetting and dispersing agent to low molecular weight polyether, heat and stir at 70-100°C, add amino or mercapto / silicate copolymer siloxane oligomer, and then add high specific surface area inorganic nanoparticles to disperse evenly to obtain an in-situ nanocomposite molecular-scale dispersion system;

[0046] B: adding the hyperbranched polysiloxane unit dropwise to the dispersion system of step A at 30-50° C. under stirring, stirring and dispersing uniformly to obtain a hyperbranched polysiloxane unit composite dispersion system;

[0047] C: Adding the α-type active alkyl copolymerized siloxane oligomer into the dispersion system of step B and dispersing the mixture evenly to obtain the high-temperature and high-humidity siloxane oligomer interface bonding agent composition.

[0048] The advantages of the preparation method of the present invention are as follows: firstly, the cross-linked siloxane wetting and dispersing agent method can achieve molecular-level compatibility between low molecular weight polyether, amino or mercapto / silicate copolymerized siloxane oligomers, and high specific surface area inorganic nanoparticles during the reaction process; secondly, the design of hyperbranched polysiloxane units and α-type active alkyl copolymerized siloxane oligomers can give the siloxane-modified polyether a dense network bonding cross-linking and rapid condensation bonding with metals, glass, concrete, and plastics, thereby avoiding the defect that the traditional modified siloxane interfacial bonding agent needs to be cross-linked and bonded with the aid of a catalyst.

[0049] The present invention also discloses the application of the high temperature and high humidity siloxane oligomer interface bonding agent composition, which is used for regulating and controlling the interface bonding between moisture-curing siloxane modified polyether sealant and metal, glass, concrete and plastic in an extremely high temperature and high humidity environment.

[0050] The invention has the following beneficial effects: the invention adopts molecular structure design to balance and regulate molecular polarity and non-polarity, so that the molecular structure of the prepared high-temperature and high-humidity siloxane oligomer interface bonding agent contains polar amino groups or ether groups. Since the amino groups or ether groups have excellent polarity effects, the interface bonding has excellent physical and chemical effects and high surface wetting functions; secondly, the molecular structure contains nanometer-sized inorganic ions, long-chain alkyl groups and hyperbranched cross-linked siloxane units, which give the siloxane polyether a dense network bonding cross-linking and rapid condensation bonding with metals, glass, concrete and plastics, and at the same time has the micro-nano convex-concave function of in-situ deposition, high wetting function, physical and chemical bonding function, excellent interface chemical bonding, in-situ bonding enhancement and long-term and efficient resistance to moisture and heat bulk destructiveness, and can improve the long-term, high stability, high lifespan, high resistance to bulk destructiveness and high water bubble resistance of the siloxane modified polyether adhesive under high temperature and high humidity.

[0051] In summary, the present invention is based on the structural characteristics of siloxane-modified polyether sealants and the interface properties of metals, glass, concrete, and plastics, and selects a composite silane / siloxane in-situ nano-enhanced molecular-level high-temperature and high-humidity resistant siloxane oligomer interface bonding agent composition with in-situ deposited micro-nano convexoconcave function, high wetting function, and physical and chemical bonding function; the siloxane oligomer interface bonding agent composition prepared by the present invention can enhance the high stability, high life, high resistance to bulk damage, and high resistance to blistering of siloxane-modified polyether sealants in high-temperature and high-humidity environments, and has low cost, easy industrial production and popularization and application. The preparation method of the high-temperature and high-humidity siloxane oligomer interface bonding agent of the present invention is simple, low cost, environmentally friendly, and convenient for industrialization. DETAILED DESCRIPTION

[0052] The present invention is further described below in conjunction with examples. These examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually carried out according to conventional conditions in the art or according to the conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection claimed by the present invention.

[0053] Example 1

[0054] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0055] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting dispersant into a reaction bottle, add 15 parts of linear polyethylene oxide (Mn=400), heat at 70-100° C. while stirring, add 45 parts of aminopropyl methoxysilane / ethyl silicate copolymerized siloxane oligomer (Mn=1500) in sequence, and then add 5 parts of silicon dioxide particles with a specific surface area of ​​300 nanometers to disperse evenly to obtain an in-situ nano-composite molecular-level size dispersion system; then continue to disperse 20 parts of methoxy hyperbranched polysiloxane units (p=30) at 30-50° C. to obtain a hyperbranched polysiloxane unit composite dispersion system; further disperse 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material added in the reaction was calculated by weight.

[0056] Example 2

[0057] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0058] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting dispersant into a reaction bottle, add 15 parts of linear polyethylene oxide (Mn=400), heat at 70-100° C. while stirring, add 45 parts of mercaptopropyl methoxysilane / ethyl silicate copolymerized siloxane oligomer (Mn=1400) in sequence, and then add 5 parts of silicon dioxide particles with a specific surface area of ​​300 nanometers to disperse evenly to obtain an in-situ nano-composite molecular-level size dispersion system; then continue to disperse 20 parts of methoxy hyperbranched polysiloxane units (p=30) at 30-50° C. to obtain a hyperbranched polysiloxane unit composite dispersion system; further disperse 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material added in the reaction was calculated by weight.

[0059] Example 3

[0060] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0061] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polyethylene oxide (Mn = 400), heat at 70-100 ° C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn = 1500), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and disperse them evenly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0062] Example 4

[0063] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0064] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting dispersant into the reaction bottle, add 15 parts of linear polyethylene oxide (Mn = 400), heat at 70-100 ° C while stirring, add 45 parts of ethylenediamine propyl methoxysilane / ethyl silicate copolymer siloxane oligomer (Mn = 1400), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and disperse them evenly to obtain an in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0065] Example 5

[0066] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0067] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polypropylene oxide (Mn = 400), heat at 70-100 ° C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn = 1500), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and disperse them evenly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0068] Example 6

[0069] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0070] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn = 400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn = 1500), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and disperse evenly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0071] Example 7

[0072] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0073] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polyethylene oxide / propylene copolymer (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn=1500), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and then add 100 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn=1500), ... The in-situ nanocomposite molecular-scale dispersion system is uniformly obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then uniformly dispersed at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0074] Example 8

[0075] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0076] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn = 400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / methyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn = 1500), 5 parts of silica particles with a specific surface area of ​​300 nanometers, and disperse evenly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0077] Example 9

[0078] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0079] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn = 400), heat at 70-100 ° C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn = 1500), 5 parts of silica aerogel with a specific surface area of ​​1200, and disperse uniformly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0080] Example 10

[0081] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0082] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (a in the molecular formula is 3, b is 7, Mn=1500), 5 parts of titanium dioxide particles with a specific surface area of ​​300 nanometers, and disperse evenly to obtain The in-situ nanocomposite molecular-scale dispersion system is obtained; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0083] Embodiment 11

[0084] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0085] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of calcium carbonate particles with a specific surface area of ​​300 nanometers, and then disperse evenly to obtain an in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-aminomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0086] Example 12

[0087] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0088] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain in-situ nanoparticles. The invention discloses a composite molecular-scale dispersion system; further, 20 parts of methoxy hyperbranched polysiloxane units (p=30) are uniformly dispersed at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; further, 12 parts of α-mercaptomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0089] Embodiment 13

[0090] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0091] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-ethylenediaminemethyltriethoxysilane / octyltriethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0092] Embodiment 14

[0093] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0094] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-ethylenediamine methyltriethoxysilane / methyltriethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0095] Embodiment 15

[0096] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0097] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-ethylenediaminemethyltriethoxysilane / propyltriethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0098] Example 16

[0099] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0100] Add 3 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting dispersant into the reaction bottle, add 15 parts of linear polytetrahydrofuran (Mn=400), heat at 70-100°C while stirring, add 45 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500), 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain an in-situ nanocomposite The molecular-scale dispersion system is prepared; 20 parts of methoxy hyperbranched polysiloxane units (p=30) are then dispersed uniformly at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; 12 parts of α-ethylenediaminemethyltriethoxysilane / dodecyltriethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are further dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0101] Embodiment 17

[0102] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0103] Add 2 parts of cyclopropyloxy glycidyl ether propyl trimethoxysilane grafted propylene oxide nonionic polyether wetting and dispersing agent into the reaction bottle, add 10 parts of linear polytetrahydrofuran (Mn=200), heat at 70-100°C while stirring, add 50 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=600) and 2 parts of silica aerogel with a specific surface area of ​​1200 nanometers, and disperse evenly to obtain in-situ nanoparticles. A composite molecular-scale dispersion system; then 5 parts of methoxy hyperbranched polysiloxane units (p=30) are uniformly dispersed at 30-50°C to obtain a hyperbranched polysiloxane unit composite dispersion system; further 5 parts of α-mercaptomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) are dispersed to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material in the reaction is calculated by weight.

[0104] Embodiment 18

[0105] This embodiment provides a high-temperature and high-humidity siloxane oligomer interface bonding agent composition, and the preparation process thereof is as follows.

[0106] Add 5 parts of trimethylsilyl propyl ethylene oxide polyether wetting dispersant and 5 parts of linear polytetrahydrofuran (Mn=800) into a reaction bottle, heat at 70-100° C. while stirring, add 20 parts of butylaminopropyl trimethoxysilane / ethyl silicate copolymerized siloxane oligomer (Mn=2000) and 5 parts of silica aerogel with a specific surface area of ​​1200 nanometers in sequence, and disperse them uniformly to obtain an in-situ nano-composite molecular-level size dispersion system; then continue to disperse 10 parts of methoxy hyperbranched polysiloxane units (p=30) uniformly at 30-50° C. to obtain a hyperbranched polysiloxane unit composite dispersion system; further disperse 15 parts of α-type mercaptomethyl triethoxysilane / octyl triethoxysilane copolymerized siloxane oligomer (a in the molecular formula is 3, b is 7 and the molecular weight is 1600) to obtain a high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The amount of each raw material added in the reaction was calculated by weight.

[0107] Comparative Example 1

[0108] This comparative example provides a consistent high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, the difference being that butylaminopropyltrimethoxysilane / ethyl silicate copolymer siloxane oligomer (Mn=1500) is not added.

[0109] Comparative Example 2

[0110] This comparative example provides a consistent high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, the difference being that no linear polytetrahydrofuran (Mn=400) is added.

[0111] Comparative Example 3

[0112] This comparative example provides a high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, except that no silica aerogel with a specific surface area of ​​1200 nanometers is added.

[0113] Comparative Example 4

[0114] This comparative example provides a consistent high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, the difference being that no methoxy hyperbranched polysiloxane unit (p=30) is added.

[0115] Comparative Example 5

[0116] This comparative example provides a consistent high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, the difference being that α-ethylenediaminemethyltriethoxysilane / octyltriethoxysilane copolymerized siloxane oligomer is not added.

[0117] Comparative Example 6

[0118] This comparative example provides a consistent high temperature and high humidity siloxane oligomer interface bonding agent composition, and its preparation process is consistent with Example 13, the difference being that the cyclopropyloxy glycidyl ether propyl trimethoxy silane grafted propylene oxide nonionic polyether wetting and dispersing agent is not added.

[0119] The above-mentioned coating performance test data include: surface drying time, actual drying time, adhesion, solid content, blister resistance time, shelf life and duration of high humidity and high heat resistance, which are tested according to the following test methods: surface drying time is tested by the finger drying method; actual drying time refers to the time from coating to completely non-stickiness of the primer film; the interface adhesion failure form test adopts room temperature conditions, maintaining for 7 days, and detecting the bonding retention area of ​​cohesive failure ≥90%; blister resistance adopts immersion in water at room temperature, and the duration of cohesive failure ≥90%; the shelf life test conditions are: at 60°C, the viscosity change is less than ≤2mPa.s for a duration; the high humidity and high heat resistance test conditions are: 85% humidity, 85°C, and the duration of cohesive failure ≥90%.

[0120] The test results are shown in Table 1.

[0121] Table 1 Performance test data of high temperature and high humidity siloxane oligomer interface bonding agent composition provided by Examples 1 to 18 and Ratios 1 to 6

[0122]

[0123]

[0124] As shown in Table 1, the siloxane-modified polyether adhesive and high-temperature and high-humidity siloxane oligomer interfacial bonding agent composition of the present invention exhibits excellent surface dryness, actual dryness, adhesion, blister resistance, shelf life and high-humidity and high-heat resistance. In particular, with the change of the molecular weight of aminopropylmethoxysilane / ethyl silicate copolymerized siloxane oligomer, the degree of polymerization of hyperbranched siloxane, the specific surface area of ​​inorganic nanoparticles, and the structural regulation of α-methylalkoxysilane / alkyltriethoxysilane copolymerized siloxane oligomer and alkyl groups, the high-temperature and high-humidity resistance adhesion exhibits different degrees of interface destruction and wettability, wet-heat attenuation and water resistance. When the interface bonding agent composition lacks butylaminopropyltrimethoxysilane / ethyl silicate copolymerized siloxane oligomer (Mn=1500) (Comparative Example 1), the bonding retention area is only ≥65%. Compared with Example 13, the number of days of water resistance is 48 days less, and the duration of high temperature and high humidity is reduced by 420h. The main reason is that when butylaminopropyltrimethoxysilane / ethyl silicate copolymerized siloxane oligomer (Mn=1500) is not added to the interface bonding agent composition of the present invention, it is difficult for the siloxane-modified polyether adhesive to form stable physical and chemical bonds with metal, glass, concrete, and plastic, resulting in the siloxane-modified polyether adhesive being wettable at the interface of metal, glass, concrete, and plastic, greatly reducing its bonding strength and failing to achieve cohesive failure. At the same time, the surface drying and actual drying curing time of the interface bonding agent are prolonged. When the interface bonding agent composition of the present invention lacks linear polytetrahydrofuran (Mn=400) (Comparative Example 2), the physical affinity of the interface is reduced, and the bonding retention area is only ≥58%. Compared with Example 13, the days of water resistance are 34 days less, and the duration of high temperature and high humidity is reduced by 360 hours. The main reason is that when the interface bonding agent composition does not add linear polytetrahydrofuran, it is difficult for the interface bonding agent composition to form a ternary block with freely adjustable affinity of amino or mercaptosilane, silicate and polytetrahydrofuran, resulting in uncoordinated polar molecular bonds and compatibility, and then the siloxane-modified polyether adhesive preferentially detaches itself, and it is impossible to achieve the metal, glass, concrete, plastic and siloxane-modified polyether adhesive. The chemical or physical bonding force between the two, the cohesive force of the interface bonding agent fails, and the bonding fails; when the interface bonding agent composition of the present invention lacks the silica aerogel with a specific surface area of ​​1200 nanometers (Comparative Example 3), the bonding retention area is only ≥60%, compared with Example 13, the number of days of water resistance is 49 days less, and the duration of high temperature and high humidity is reduced by 450 hours. The main reason is that when the interface bonding agent composition does not add the silica aerogel with a specific surface area of ​​1200 nanometers, it cannot provide the micro-nano concave and convex physical surface of the metal, glass, concrete, and plastic surface, thereby losing the firm physical bite between the siloxane-modified polyether glue molecules, and its cohesive force and water resistance fail, and the bonding fails;When the interface bonding agent composition of the present invention lacks methoxy hyperbranched polysiloxane units (p=30) (Comparative Example 4), the bonding retention area is only ≥50%. Compared with Example 13, the number of days of water resistance is 47 days less, and the duration of high temperature and high humidity is reduced by 440 hours. The main reason is that when the interface bonding agent composition does not contain methoxy hyperbranched polysiloxane units, on the one hand, the chemical in-situ bonding force between the siloxane-modified polyether adhesive and the metal, glass, concrete, and plastic interface is weakened; on the other hand, the siloxane-modified polyether adhesive is After the ether glue is combined with the metal, glass, concrete, and plastic interface, it cannot form a dense network structure and super-hydrophobicity, resulting in the interface under high temperature and high humidity conditions. The ability of water vapor to attack the interface is enhanced, thereby greatly reducing the resistance to moisture and heat; when the interface bonding agent composition of the present invention lacks α-ethylenediaminemethyltriethoxysilane / octyltriethoxysilane copolymerized siloxane oligomer (Comparative Example 5), the bonding retention area is only ≥50%. Compared with Example 13, the number of days of water immersion resistance is reduced by 47 days, and the duration of high temperature and high humidity is reduced by 4 The main reasons are: when the interface bonding agent composition does not add α-ethylenediaminemethyltriethoxysilane / octyltriethoxysilane copolymerized siloxane oligomer, the network bonding cross-linking and rapid condensation bonding between the siloxane-modified polyether adhesive and the metal, glass, concrete, and plastic interface are weakened, resulting in the need for catalyst-catalyzed cross-linking bonding. At the same time, due to the lack of the hydrophobic effect of the long-chain alkyl group, the bonding fails rapidly under the wet-heat cycle; when the interface bonding agent composition of the present invention lacks cyclopropyloxy glycidyl ether propyl trimethoxysilane When the branched epoxypropylene nonionic polyether wetting and dispersing agent (Comparative Example 6) was added, compared with Example 13, the days of water resistance were 42 days less, and the duration of high temperature and high humidity was reduced by 460 hours. The main reason was that when the interfacial bonding agent composition did not add the polyether wetting and dispersing agent, the butylaminopropyl trimethoxysilane / ethyl silicate copolymerized siloxane oligomer with Mn=1500 and the silica aerogel with a specific surface area of ​​1200 nanometers had poor compatibility and were difficult to disperse uniformly, which aggravated the structural defects and caused a significant failure of bonding under wet-heat cycling. ;

[0125] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A high temperature and high humidity resistant siloxane oligomer interface bonding agent composition, characterized in that: It is composed of the following components in parts by mass: The amino or mercapto / silicate copolymerized siloxane oligomer has a structure as shown in Formula I: wherein R1 and R2 are C1-C4 alkyl groups; R2 is C1-C4 alkyl or aryl group; X is a primary amino group, a secondary amino group, ethylenediamine group or a mercapto group; a and b are positive integers of 0 to 10 and 2≤a+b≤20; The molecular formula of the hyperbranched polysiloxane unit is shown in Formula II: In formula II, R3 is a saturated straight or branched alkyl group with a carbon number of C1 to C4; p represents a positive integer of 20 to 80; The molecular formula of the α-type active alkyl copolymerized siloxane oligomer is shown in Formula III: In formula III, Y is NH, NH2CH2CH2NH or SH; R5 is a C1-C4 alkyl group; R4 is a C1-C 12 a and b are respectively positive integers of 0 to 10 and 2≤a+b≤20.

2. The high temperature and high humidity resistant siloxane oligomer interface bonding agent composition according to claim 1, characterized in that: It is composed of the following components in mass fraction:

3. The high temperature and high humidity siloxane oligomer interface bonding agent composition according to claim 1, characterized in that: The number average molecular weight Mn of the amino or mercapto / silicate copolymerized siloxane oligomer is 600-2000.

4. The high temperature and high humidity siloxane oligomer interface bonding agent composition according to claim 1, characterized in that: The low molecular weight polyether is one of a linear copolymer of ethylene oxide and propylene oxide, a linear homopolymer of ethylene oxide, a linear homopolymer of propylene oxide, or a linear homopolymer of tetrahydrofuran ether, wherein the number average molecular weight of the low molecular weight polyether ranges from 200 to 800.

5. The high temperature and high humidity siloxane oligomer interface bonding agent composition according to claim 1, characterized in that: The high specific surface area inorganic nanoparticles are one or a mixture of two or more of nano silicon dioxide, nano titanium dioxide, and nano calcium carbonate; the siloxane wetting and dispersing agent is one or a mixture of two of trimethylsilylpropyl ethylene oxide nonionic surfactant or cross-linked epoxy glycidyl ether silane nonionic surfactant.

6. The method for preparing the high temperature and high humidity siloxane oligomer interface bonding agent composition according to any one of claims 1 to 5, characterized in that: It includes the following steps: A: Add siloxane wetting and dispersing agent to low molecular weight polyether, heat and stir at 70-100°C, add amino or mercapto / silicate copolymer siloxane oligomer, and then add high specific surface area inorganic nanoparticles to disperse evenly to obtain an in-situ nanocomposite molecular-scale dispersion system; B: adding the hyperbranched polysiloxane unit dropwise to the dispersion system of step A at 30-50° C. under stirring, stirring and dispersing uniformly to obtain a hyperbranched polysiloxane unit composite dispersion system; C: Adding the α-type active alkyl copolymerized siloxane oligomer into the dispersion system of step B and dispersing the mixture evenly to obtain the high-temperature and high-humidity siloxane oligomer interface bonding agent composition.

7. Use of the high temperature and high humidity siloxane oligomer interface bonding agent composition according to any one of claims 1 to 5, characterized in that: It is used for the interface bonding regulation and application of moisture-curing siloxane-modified polyether sealant with metal, glass, concrete, and plastic in extremely high temperature and high humidity environments.

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