CN113429908B - Adhesion promoter and BIPV system - Google Patents
Adhesion promoter and BIPV system Download PDFInfo
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- CN113429908B CN113429908B CN202110955140.4A CN202110955140A CN113429908B CN 113429908 B CN113429908 B CN 113429908B CN 202110955140 A CN202110955140 A CN 202110955140A CN 113429908 B CN113429908 B CN 113429908B
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- 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
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/16—Compositions of 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; Compositions of derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
Abstract
The invention discloses an adhesion promoter and a BIPV system, and relates to the technical field of photovoltaics, so that a metal plate and a structural adhesive are easily and firmly adhered together. The adhesion promoter comprises: the catalyst comprises a silane polymer, a cross-linking agent and a catalyst, wherein the polymerization degree of the silane polymer is 2-10; the mass ratio of the silane polymer, the cross-linking agent and the catalyst is (2-10): (10-20): (0.1-5). The adhesion promoter and the BIPV system provided by the invention are used for manufacturing the BIPV system.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to an adhesion promoter and a BIPV system.
Background
BIPV technology is a technology that integrates solar power generation (photovoltaic) products into a building. Among them, photovoltaic roofing is an important application of BIPV technology. The roof of an industrial plant is generally of a profiled metal sheet structure. The metal plate generally includes a substrate, a plating layer covering the surface of the substrate, and a fingerprint resistant layer provided on the surface of the plating layer.
When the BIPV system is manufactured, the photovoltaic module and the metal plate are bonded together through structural adhesive. In the bonding process, the problems of uneven surface, low surface energy, fingerprint resistance layer, grease and the like of the metal plate result in poor bonding effect of the metal plate and the structural adhesive.
Disclosure of Invention
The object of the present invention is to provide an adhesion promoter and BIPV system for easy and firm adhesion of metal sheets to structural adhesives.
In a first aspect, the present invention provides an adhesion promoter. The adhesion promoter comprises: the catalyst comprises a silane polymer, a cross-linking agent and a catalyst, wherein the polymerization degree of the silane polymer is 2-10; the mass ratio of the silane polymer, the cross-linking agent and the catalyst is (2-10): (10-20): (0.1-5).
By adopting the technical scheme, the adhesion promoter contains the silane polymer, and the polymerization degree of the silane polymer is 2-10. At this time, the molecular weight of the silane-based polymer is small. When the adhesion promoter is coated on the metal plate, the silane polymer with smaller molecular weight can quickly wet the surface of the metal plate, so that the problem of too slow wetting when the metal plate is adhered with the structural adhesive is avoided. The silane polymer and the cross-linking agent in the adhesion promoter can be subjected to a pre-crosslinking reaction under the catalysis of the catalyst to generate a microscopic network structure, so that the adhesion promoter has higher cohesive strength. And the mass ratio of (2-10), (10-20) and (0.1-5) of the silane polymer, the cross-linking agent and the catalyst is proper, so that the adhesion promoter has better cohesive strength, and the problems that the pre-cross-linking reaction is completed too quickly before the structural adhesive is coated and the strength of the adhesion promoter is affected by lower pre-cross-linking reaction degree are avoided. After the pre-crosslinking reaction of the adhesion promoter is completed, the surface of the adhesion promoter still has more active groups, so that the adhesion promoter, the structural adhesive and the metal plate can form more chemical bonds. And the active group of the adhesion promoter can form a firm cross-linking structure with the structural adhesive, so that the structural adhesive and the metal plate are firmly connected.
On the one hand, the adhesion promoter can generate a network structure with larger cohesive strength inside on the basis of rapid wetting, and can improve the adhesive strength between a metal plate and structural adhesive; on the other hand, the surface of the metal plate has more active groups, and can form more chemical bonds with structural adhesive and metal plates at two sides respectively. It can be seen that the adhesion promoter can rapidly and firmly adhere the metal plate and the structural adhesive together.
In some possible implementations, the silane-based polymer includes one or more of polydiaminodisilane, polydimethylsiloxane. At this time, under the condition of low polymerization degree, the polydiaminodisilane and the polydimethylsiloxane can form a complete and firm network structure under the crosslinking reactivity, and have more active groups to form stable chemical bonds with the metal plate and the structural adhesive.
In some possible implementations, the crosslinker includes one or more of a trifunctional silicone crosslinker, a tetrafunctional silicone crosslinker. In this case, the crosslinking agent molecule has a large number of functional groups capable of participating in the crosslinking reaction. When the cross-linking agent and the silane polymer are subjected to cross-linking reaction, a stable three-dimensional network structure can be formed. And, these crosslinking agents facilitate the reaction of the silane-based polymer with the structural adhesive.
In some possible implementations, the catalyst is an organotin-based catalyst. The reaction speed of the pre-crosslinking reaction can be regulated and controlled through the organotin catalyst, so that a complete and stable network structure is formed, and the adverse effect on the strength of the adhesion promoter caused by too slow reaction of the silane polymer and the crosslinking agent is avoided.
In some possible implementations, the cross-linking agent is methyltriethoxysilane. At this time, a stable network structure can be formed between the methyltriethoxysilane, the polydiaminodisilane and the polydimethylsiloxane, which is beneficial to improving the cohesive strength of the adhesion promoter.
In some possible implementations, the adhesion promoter further includes a coupling agent including one or more of an aminosilane coupling agent, an epoxy silane coupling agent. At this time, the coupling agent is added, so that on one hand, the pre-crosslinking reaction can be participated, active groups in the pre-crosslinking reaction process are increased, and the reaction completion degree of the pre-crosslinking reaction and the stability of a network structure produced by the pre-crosslinking reaction are improved; on the other hand, the active groups of the adhesion promoter after the pre-crosslinking reaction can be increased, so that the number of chemical bonds formed between the adhesion promoter and the metal plate and the structural adhesive can be increased, and the strength of the adhesion promoter for connecting the metal plate and the structural adhesive can be further improved.
In some possible implementations, the adhesion promoter further includes a solvent having a polarity of less than or equal to 5. In this case, the polarity of the solvent is small, and the solvent is close to the polarity of paraffin contained in the fingerprint resistant layer, so that paraffin and the like on the surface of the metal plate can be dissolved, the wetting effect of the adhesion promoter on the surface of the metal plate can be improved, and the wetting speed can be increased. And when the paraffin wax and the like on the surface of the metal plate volatilize along with the solvent, active groups on the surface of the metal plate can be released, so that the number of chemical bonds formed between the metal plate and the adhesion promoter is further increased, and the connection strength between the metal plate and the adhesion promoter is improved.
In some possible implementations, the solvent is an alkane. At this time, the polarity of the silane compound is low, so that substances such as paraffin on the surface of the metal plate can be well dissolved, and the silane compound is easy to volatilize, thereby being beneficial to reducing substances such as paraffin on the surface of the metal plate in the volatilization process.
In some possible implementations, the solvent includes one or more of diethyl ether, chloroform. The diethyl ether and the chloroform not only can rapidly dissolve the paraffin, but also can be volatilized very easily at normal temperature, so that the paraffin on the surface of the metal plate can be reduced rapidly in the process of brushing the adhesion promoter.
In some possible implementations, the adhesion promoter includes, in mass fraction: 50 to 100 parts of silane polymer, 10 to 20 parts of cross-linking agent, 0.9 to 10 parts of coupling agent, 0.1 to 5 parts of catalyst and 20 to 200 parts of solvent. At this time, the silane polymer, the crosslinking agent, the coupling agent, the catalyst and the solvent in the ratio can be well mixed. More solvent can be contacted with the metal plate to dissolve substances such as paraffin on the surface of the metal plate, so that active groups are released; then the silane polymer, the cross-linking agent and the catalyst are contacted with the metal plate, and a pre-cross-linking reaction is carried out inside the metal plate to form a network structure while a chemical bond is formed with active groups on the surface of the metal plate. After the structural adhesive is coated, active groups on the surface of the adhesion promoter and the structural adhesive form chemical bonds to complete the crosslinking of the adhesion promoter, so that the metal plate and the structural adhesive are easily and firmly bonded under the action of the adhesion promoter.
In a second aspect, the present invention provides a BIPV system. The BIPV system comprises a metal sheet, a structural adhesive, or an adhesion promoter as described in the first aspect or any one of the possible implementations of the first aspect; the metal plate and the structural adhesive are bonded together by an adhesion promoter.
The advantages of the BIPV system provided in the second aspect may be referred to the advantages of the adhesion promoter described in the first aspect or any implementation manner of the first aspect, and will not be repeated here.
Detailed Description
In order to clearly describe the technical solution of the embodiments of the present invention, in the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate an azimuth or a positional relationship based on the indicated azimuth or positional relationship, which are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the present invention, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the present invention, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.
The embodiment of the invention provides an adhesion promoter. The adhesion promoter is used to join the metal plate and the structural adhesive.
The adhesion promoter includes: a silane polymer, a cross-linking agent and a catalyst. Wherein the polymerization degree of the silane polymer is 2-10. The mass ratio of the silane polymer, the cross-linking agent and the catalyst is (2-10): (10-20): (0.1-5).
Based on the composition of the adhesion promoter, it is known that the adhesion promoter contains a silane-based polymer, and the polymerization degree of the silane-based polymer is 2 to 10. At this time, the molecular weight of the silane-based polymer is small. When the adhesion promoter is coated on the metal plate, the silane polymer with smaller molecular weight can quickly wet the surface of the metal plate, so that the problem of too slow wetting when the metal plate is adhered with the structural adhesive is avoided. The silane polymer and the cross-linking agent in the adhesion promoter can be subjected to a pre-crosslinking reaction under the catalysis of the catalyst to generate a microscopic network structure, so that the adhesion promoter has higher cohesive strength. And the mass ratio of (2-10), (10-20) and (0.1-5) of the silane polymer, the cross-linking agent and the catalyst is proper, so that the adhesion promoter has better cohesive strength, and the problems that the pre-cross-linking reaction is completed too quickly before the structural adhesive is coated and the strength of the adhesion promoter is affected by lower pre-cross-linking reaction degree are avoided. After the pre-crosslinking reaction of the adhesion promoter is completed, the surface of the adhesion promoter still has more active groups, so that the adhesion promoter, the structural adhesive and the metal plate can form more chemical bonds. And the active group of the adhesion promoter can form a firm cross-linking structure with the structural adhesive, so that the structural adhesive and the metal plate are firmly connected.
On the one hand, the adhesion promoter can generate a network structure with larger cohesive strength inside on the basis of rapid wetting, and can improve the adhesion strength between a metal plate and structural adhesive; on the other hand, the surface of the metal plate has more active groups, and can form more chemical bonds with structural adhesive and metal plates at two sides respectively. It can be seen that the adhesion promoter can rapidly and firmly adhere the metal plate and the structural adhesive together.
In practical applications, the degree of polymerization of the silane-based polymer may be 2, 3, 4, 5, 6, 7, 8, 9, 10, etc. At this time, the polymerization degree of the silane polymer is ensured to be low, the molecular weight of the silane polymer is ensured to be small, the wetting speed of the adhesion promoter is further improved, and the adhesion speed of the metal plate and the structural adhesive is improved.
Specifically, the silane polymer comprises one or more of polydiaminodisilane and polydimethylsiloxane. That is, the silane-based polymer may be a single polydiaminodisilane or a polydimethylsiloxane, or may be a mixture of polydiaminodisilane and polydimethylsiloxane. At this time, under the condition of low polymerization degree, the polydiaminodisilane and the polydimethylsiloxane can form a complete and firm network structure under the crosslinking reactivity, and have more active groups to form stable chemical bonds with the metal plate and the structural adhesive.
The cross-linking agent comprises one or more of trifunctional organosilicon cross-linking agent and tetrafunctional organosilicon cross-linking agent. In this case, the crosslinking agent molecule has a large number of functional groups capable of participating in the crosslinking reaction. When the cross-linking agent and the silane polymer are subjected to cross-linking reaction, a stable three-dimensional network structure can be formed. And, these crosslinking agents facilitate the reaction of the silane-based polymer with the structural adhesive.
In practical applications, the crosslinking agent may be methyltriethoxysilane. At this time, a stable network structure can be formed between the methyltriethoxysilane, the polydiaminodisilane and the polydimethylsiloxane, which is beneficial to improving the cohesive strength of the adhesion promoter.
The catalyst is an organotin catalyst. The organotin catalyst is a metal organic compound formed by directly combining tin and carbon elements. Specifically, the organotin catalyst adopted in the embodiment of the invention can be one or more of dibutyl tin dilaurate, stannous octoate, dibutyl tin di (dodecyl sulfide) and dibutyl tin diacetate. The reaction speed of the pre-crosslinking reaction can be regulated and controlled through the organotin catalyst, so that a complete and stable network structure is formed, and the adverse effect on the strength of the adhesion promoter caused by too slow reaction of the silane polymer and the crosslinking agent is avoided.
The adhesion promoter may also include a coupling agent. The coupling agent comprises one or more of an aminosilane coupling agent and an epoxy silane coupling agent. At this time, the coupling agent is added, so that on one hand, the pre-crosslinking reaction can be participated, active groups in the pre-crosslinking reaction process are increased, and the reaction completion degree of the pre-crosslinking reaction and the stability of a network structure produced by the pre-crosslinking reaction are improved; on the other hand, the active groups of the adhesion promoter after the pre-crosslinking reaction can be increased, so that the number of chemical bonds formed between the adhesion promoter and the metal plate and the structural adhesive can be increased, and the strength of the adhesion promoter for connecting the metal plate and the structural adhesive can be further improved.
In practical application, the aminosilane coupling agent may be selected from gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyl methyldimethoxysilane, and phenylaminomethyl triethoxysilane.
The adhesion promoter may also include a solvent having a polarity of less than or equal to 5. In this case, the polarity of the solvent is small, and the solvent is close to the polarity of paraffin contained in the fingerprint resistant layer, so that paraffin and the like on the surface of the metal plate can be dissolved, the wetting effect of the adhesion promoter on the surface of the metal plate can be improved, and the wetting speed can be increased. And when the paraffin wax and the like on the surface of the metal plate volatilize along with the solvent, active groups on the surface of the metal plate can be released, so that the number of chemical bonds formed between the metal plate and the adhesion promoter is further increased, and the connection strength between the metal plate and the adhesion promoter is improved.
In practical applications, the solvent may be an alkane compound. At this time, the polarity of the silane compound is low, so that substances such as paraffin on the surface of the metal plate can be well dissolved, and the silane compound is easy to volatilize, thereby being beneficial to reducing substances such as paraffin on the surface of the metal plate in the volatilization process.
The solvent comprises one or more of diethyl ether and chloroform. The diethyl ether and the chloroform not only can rapidly dissolve the paraffin, but also can be volatilized very easily at normal temperature, so that the paraffin on the surface of the metal plate can be reduced rapidly in the process of brushing the adhesion promoter.
The above adhesion promoter may include, in mass fraction: 50 to 100 parts of silane polymer, 10 to 20 parts of cross-linking agent, 0.9 to 10 parts of coupling agent, 0.1 to 5 parts of catalyst and 20 to 200 parts of solvent. At this time, the silane polymer, the crosslinking agent, the coupling agent, the catalyst and the solvent in the ratio can be well mixed. More solvent can be contacted with the metal plate to dissolve substances such as paraffin on the surface of the metal plate, so that active groups are released; then the silane polymer, the cross-linking agent and the catalyst are contacted with the metal plate, and a pre-cross-linking reaction is carried out inside the metal plate to form a network structure while a chemical bond is formed with active groups on the surface of the metal plate. After the structural adhesive is coated, active groups on the surface of the adhesion promoter and the structural adhesive form chemical bonds to complete the crosslinking of the adhesion promoter, so that the metal plate and the structural adhesive are easily and firmly bonded under the action of the adhesion promoter.
The embodiment of the invention also provides a preparation method of the adhesion promoter, which is used for preparing the adhesion promoter provided by the embodiment. The preparation method of the adhesion promoter comprises the following steps: 50 to 100 parts of silane polymer, 10 to 20 parts of cross-linking agent, 0.9 to 10 parts of coupling agent, 0.1 to 5 parts of catalyst and 20 to 200 parts of solvent are uniformly mixed according to a proportion. After the configuration is completed, the adhesion promoter is quickly painted onto the metal plate, and then the structural adhesive is painted onto the adhesion promoter.
The embodiment of the invention also provides a BIPV system. The BIPV system comprises a metal plate, a structural adhesive and the adhesion promoter described above. The metal plate and the structural adhesive are bonded together by an adhesion promoter. Specifically, the structural adhesive is mainly silicone structural adhesive.
In order to verify the performance of the adhesion promoters provided by the examples of the present invention, the following description is made in a manner that the examples and comparative examples are compared with each other.
Example 1
The adhesion promoter provided in this example comprises, in parts by mass: 100 parts of polydimethylsiloxane (polymerization degree 5), 20 parts of methyltriethoxysilane, 5 parts of an aminosilane coupling agent, 1 part of an organotin-based catalyst and 100 parts of chloroform.
The preparation method of the adhesion promoter provided by the embodiment of the invention specifically comprises the following steps:
polydimethylsiloxane (polymerization degree is 5), methyltriethoxysilane, an aminosilane coupling agent, an organotin catalyst and chloroform are uniformly mixed according to the proportion for standby.
Embodiment two:
the adhesion promoter provided in this example comprises, in parts by mass: 50 parts of polydiaminodisilane (polymerization degree of 2), 10 parts of methyltriethoxysilane, 0.9 part of epoxy silane coupling agent, 0.1 part of organotin catalyst and 20 parts of diethyl ether.
The preparation method of the adhesion promoter in the embodiment of the invention is basically the same as that of the implementation, and is not repeated.
Embodiment III:
the adhesion promoter provided in this example comprises, in parts by mass: 80 parts of polydimethylsiloxane (polymerization degree is 10), 15 parts of methyltriethoxysilane, 10 parts of an aminosilane coupling agent, 5 parts of an organotin-based catalyst and 200 parts of diethyl ether.
The preparation method of the adhesion promoter in the embodiment of the invention is basically the same as that of the implementation, and is not repeated.
Embodiment four:
the adhesion promoter provided in this example comprises, in parts by mass: 65 parts of polydimethylsiloxane (polymerization degree of 8), 12 parts of methyltriethoxysilane, 2 parts of an aminosilane coupling agent, 0.8 part of an organotin-based catalyst and 60 parts of diethyl ether.
The preparation method of the adhesion promoter in the embodiment of the invention is basically the same as that of the implementation, and is not repeated.
Fifth embodiment:
the adhesion promoter provided in this example comprises, in parts by mass: 90 parts of polydiaminodisilane (polymerization degree 4), 18 parts of methyltriethoxysilane, 6 parts of epoxy silane coupling agent, 3 parts of organotin catalyst and 150 parts of chloroform.
The preparation method of the adhesion promoter in the embodiment of the invention is basically the same as that of the implementation, and is not repeated.
The metal plate and the structural adhesive were bonded together using the adhesion promoters prepared in examples one to five, and comparative examples were set. In the test of the comparative example, the metal plate and the structural adhesive were directly bonded without using an adhesion promoter. The bonding effects of examples one to five, and the comparative examples are shown in table 1.
Table 1 effects of bonding Metal plates and structural Adhesives with different schemes
As is clear from table 1, when the metal plate and the structural adhesive were bonded together using the adhesion promoters prepared in examples one to five, the tensile bond strength between the structural adhesive and the metal plate was 1.27MPa or more. And, the failure mode is cohesive failure. In the comparative example, when the structural adhesive and the metal plate are directly bonded together without adopting the adhesion promoter of the embodiment of the invention, the tensile bonding strength between the structural adhesive and the metal plate is below 0.5MPa, and only 0.41MPa; and the bonding interface of the metal plate is damaged, so that when other mediums exist, the bonding system becomes unstable, and the reliability is poor under outdoor long-term service.
By contrast, the adhesion promoter provided by the embodiment of the invention can improve the tensile adhesion strength by at least 2 times, so that the service life of the BIPV system can be greatly prolonged. In addition, after the adhesion promoter provided by the embodiment of the invention is adopted, the damage mode is cohesive damage, namely structural adhesive is damaged, the adhesion interface is very stable, the influence of other external media is small, and the adhesion promoter has very good reliability under outdoor long-term service.
While the invention has been described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Although the invention has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the invention. Accordingly, this description is merely exemplary of the invention as defined in the appended claims and is intended to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. An adhesion promoter comprising: the catalyst comprises a silane polymer, a cross-linking agent, a catalyst, a coupling agent and a solvent, wherein the silane polymer comprises one or more of polydiaminodisilane and polydimethylsiloxane; the polymerization degree of the silane polymer is 2-10; the cross-linking agent comprises one or more of trifunctional organosilicon cross-linking agent and tetrafunctional organosilicon cross-linking agent; the catalyst is an organotin catalyst;
the adhesion promoter comprises the following components in parts by mass: 50 to 100 parts of silane polymer, 10 to 20 parts of cross-linking agent, 0.9 to 10 parts of coupling agent, 0.1 to 5 parts of catalyst and 20 to 200 parts of solvent.
2. The adhesion promoter of claim 1 wherein said cross-linking agent is methyltriethoxysilane.
3. The adhesion promoter of claim 1, wherein the coupling agent comprises one or more of an aminosilane coupling agent, an epoxy silane coupling agent.
4. The adhesion promoter of claim 1, wherein the polarity of the solvent is less than or equal to 5.
5. The adhesion promoter of claim 4, wherein the solvent is an alkane.
6. The adhesion promoter of claim 5, wherein the solvent comprises one or more of diethyl ether, chloroform.
7. A BIPV system comprising a metal sheet, a structural adhesive and an adhesion promoter according to any one of claims 1 to 6;
the metal plate and the structural adhesive are bonded together by the adhesion promoter.
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| CN111117410A (en) * | 2018-10-31 | 2020-05-08 | 娄从江 | High-water-resistance primer for silane modified building sealant |
| CN111057517A (en) * | 2019-12-31 | 2020-04-24 | 广州机械科学研究院有限公司 | Bi-component fast curing type organic silicon structural adhesive and preparation method thereof |
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