Photovoltaic module silicone adhesive and preparation method thereof

Abstract

The invention relates to a photovoltaic module silicone adhesive and a preparation method thereof, in particular to the photovoltaic module silicone adhesive, which is characterized by comprising the following components in parts by weight: alpha, alpha, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta- The high-temperature-resistant silicone rubber comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 35-55 parts of methyl phenyl silicone oil, 150-200 parts of filler, 25-45 parts of a cross-linking agent curing agent, 1-5 parts of a cross-linking agent, 2-4 parts of a coupling agent and 1-2 parts of a catalyst dibutyltin dilaurate, wherein the cross-linking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane according to a molar ratio of 1: 2.1.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a photovoltaic module silicone adhesive and a preparation method thereof. Background Art

[0002] With the widespread application of renewable energy, solar photovoltaic systems have become a green, efficient and sustainable energy solution. The manufacturing, packaging and installation of silicon wafers in photovoltaic modules are one of the key links. As an important packaging adhesive, silicone adhesive is often used in the manufacturing and installation of solar photovoltaic modules. The application environment of adhesive for solar photovoltaic modules is mainly outdoor, which puts forward the following performance requirements for its performance: good weather resistance, able to withstand erosion such as severe cold, extreme heat, strong winds and rainstorms; fast curing and easy handling. Therefore, there is still a need to develop new silicone adhesives for photovoltaic modules. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a photovoltaic module silicone adhesive and a preparation method thereof.

[0004] To achieve the purpose of the present invention, on the one hand, the present invention provides a photovoltaic module silicone adhesive, which includes, by weight: 100 parts of α, ω-dihydroxypolydimethylsiloxane, 35-55 parts of methylphenyl silicone oil, 150-200 parts of filler, 25-45 parts of crosslinking agent curing agent, 1-5 parts of crosslinking agent, 2-4 parts of coupling agent, and 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.1.

[0005] In some preferred embodiments, the filler of the present invention is selected from one or more of active sodium calcium carbonate, ultrafine light calcium carbonate, silicon powder, quartz powder, talcum powder and mica powder. Preferably, the filler is active sodium calcium carbonate.

[0006] In some preferred embodiments, the cross-linking curing agent of the present invention is prepared by mixing vinyl tributylidene oxime siloxane and tetraethyl orthosilicate in a mass ratio of 1: (10-30).

[0007] In some preferred embodiments, the coupling agent of the present invention is prepared by mixing bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane in a mass ratio of (2-4):1.

[0008] In some preferred embodiments, the present invention provides a photovoltaic module silicone adhesive, which includes, by weight: 100 parts of α, ω-dihydroxypolydimethylsiloxane, 40-55 parts of methylphenyl silicone oil, 160-190 parts of filler, 30-45 parts of crosslinking agent curing agent, 2-4 parts of crosslinking agent, 2-4 parts of coupling agent, and 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.1.

[0009] In some preferred embodiments, the present invention provides a photovoltaic module silicone adhesive, which includes, by weight: 100 parts of α, ω-dihydroxypolydimethylsiloxane, 40-50 parts of methylphenyl silicone oil, 160-170 parts of filler, 30-40 parts of crosslinking agent curing agent, 3-4 parts of crosslinking agent, 3-4 parts of coupling agent, and 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.1.

[0010] In some preferred embodiments, the present invention provides a photovoltaic module silicone adhesive, which includes, by weight: 100 parts of α, ω-dihydroxypolydimethylsiloxane, 45 parts of methylphenyl silicone oil, 165 parts of filler, 35 parts of crosslinking agent curing agent, 3 parts of crosslinking agent, 3 parts of coupling agent, and 2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.1.

[0011] The present invention also provides a method for preparing photovoltaic module silicone adhesive, comprising:

[0012] 1) Weighing α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, filler, crosslinking agent curing agent, crosslinking agent, coupling agent and catalyst dibutyltin dilaurate respectively according to the above weight percentages;

[0013] 2) α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil and filler are mixed evenly, after cooling, crosslinking agent curing agent and crosslinking agent are added, mixed evenly, vacuumized, and under the condition of vacuum degree of 0.06-0.08MPa, catalyst and coupling agent are added, mixed evenly, and the silicone glue is obtained.

[0014] Preferably, the cooling temperature in step 2) is 50°C.

[0015] The present invention also provides a method for preparing a crosslinking agent, which comprises the following reaction steps: firstly putting 3-aminopyridine into a reaction bottle under stirring conditions, and then dripping 2.1 molar equivalents of 3-chloropropyltrimethylsilane into the 3-aminopyridine under nitrogen protection.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) The present application designs and prepares a cross-linking agent with a novel structure, which cooperates with the cross-linking agent curing agent to achieve a balanced reaction activity of the entire system through the synergistic effect with the preferred components and dosages in the system, thereby shortening the curing time and achieving excellent bonding strength;

[0018] 2) The coupling agent is prepared by mixing bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane in a mass ratio of (2-4):1. The use of the two improves the situation that a single coupling agent does not adhere to individual substrates, expands the application range of bonding and greatly improves the bonding effect. DETAILED DESCRIPTION

[0019] The following representative examples are intended to better illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the materials used in the following examples were commercially available.

[0020] α,ω-dihydroxypolydimethylsiloxane was purchased from Tianjin Xiensi Biochemical Technology Co., Ltd.;

[0021] Methylphenyl silicone oil was purchased from Shandong West Asia Chemical Co., Ltd.;

[0022] Active sodium calcium carbonate was purchased from Shanghai Daewoo Biochemical Co., Ltd.

[0023] Preparation Example Preparation of cross-linking agent

[0024] Under stirring conditions, 10 mol of 3-aminopyridine was first placed in a reaction bottle, and under nitrogen protection, 21 mol of 3-chloropropyltrimethylsilane was added dropwise to the 3-aminopyridine, and the addition was completed within 4 hours; the stirring speed was maintained at 70 rpm, and the reaction was carried out at 60° C. for 4 hours to obtain the cross-linking agent.

[0025] Example 1

[0026] Weigh 100 parts of α,ω-dihydroxypolydimethylsiloxane, 45 parts of methylphenyl silicone oil, 165 parts of active sodium calcium carbonate, 35 parts of a crosslinking agent and curing agent (vinyl trisbutyl ketoxime siloxane and ethyl orthosilicate mixed in a mass ratio of 1:20), 3 parts of a crosslinking agent prepared in the preparation example, 3 parts of a coupling agent (bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane mixed in a mass ratio of 3:1), and 2 parts of a catalyst dibutyltin dilaurate according to weight percentage; mix the α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, and active sodium calcium carbonate evenly, add the crosslinking agent and curing agent and the crosslinking agent after cooling, mix evenly, evacuate, add the catalyst and the coupling agent under a vacuum degree of 0.07 MPa, mix evenly, and obtain the silicone glue.

[0027] Example 2

[0028] Weigh 100 parts of α,ω-dihydroxypolydimethylsiloxane, 50 parts of methylphenyl silicone oil, 170 parts of quartz powder, 40 parts of a crosslinking agent and curing agent (vinyl trisbutyl ketoxime siloxane and ethyl orthosilicate mixed in a mass ratio of 1:25), 4 parts of a crosslinking agent prepared in the preparation example, 3 parts of a coupling agent (bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane mixed in a mass ratio of 2:1), and 2 parts of a catalyst dibutyltin dilaurate according to weight percentage; mix the α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, and mica powder evenly, add the crosslinking agent and curing agent and the crosslinking agent after cooling, mix evenly, evacuate, add the catalyst and the coupling agent under a vacuum degree of 0.06MPa, mix evenly, and obtain the silicone glue.

[0029] Example 3

[0030] Weigh 100 parts of α,ω-dihydroxypolydimethylsiloxane, 50 parts of methylphenyl silicone oil, 160 parts of talc, 40 parts of a crosslinking agent and curing agent (vinyl trisbutyl ketoxime siloxane and ethyl orthosilicate mixed in a mass ratio of 1:30), 3 parts of a crosslinking agent prepared in the preparation example, 4 parts of a coupling agent (bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane mixed in a mass ratio of 2:1), and 2 parts of a catalyst dibutyltin dilaurate according to weight percentage; mix the α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, and quartz powder evenly, add the crosslinking agent and curing agent and the crosslinking agent after cooling, mix evenly, evacuate, add the catalyst and the coupling agent under a vacuum degree of 0.08MPa, mix evenly, and obtain the silicone glue.

[0031] Example 4

[0032] Weigh 100 parts of α,ω-dihydroxypolydimethylsiloxane, 35 parts of methylphenyl silicone oil, 170 parts of active sodium calcium carbonate, 30 parts of a crosslinking agent and curing agent (vinyl trisbutyl ketoxime siloxane and ethyl orthosilicate mixed in a mass ratio of 1:30), 4 parts of a crosslinking agent prepared in the preparation example, 3 parts of a coupling agent (bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane mixed in a mass ratio of 2:1), and 2 parts of a catalyst dibutyltin dilaurate according to weight percentage; mix the α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, and active sodium calcium carbonate evenly, add the crosslinking agent and curing agent and the crosslinking agent after cooling, mix evenly, evacuate, add the catalyst and the coupling agent under a vacuum degree of 0.06MPa, mix evenly, and obtain the silicone glue.

[0033] Comparative Example 1

[0034] A fast-curing two-component silicone structural adhesive product was prepared by referring to the preparation method of Example 3 in CN114262599A.

[0035] The performance of the photovoltaic module silicone adhesive prepared in the above examples and comparative examples was tested. The melt index was tested on a melt index meter produced by Shanghai Star Scientific Instrument Co., Ltd. according to GB3682 standard; the limiting oxygen index (LOI) was tested using an oxygen index tester in accordance with GB / T2406-2009. The obtained data are shown in the following table:

[0036] Table 1 Performance test results

[0037]

[0038] Compared with the comparative example, the photovoltaic module silicone adhesive of the present invention has a short curing time and excellent comprehensive performance.

[0039] Although the present invention has been described in detail above, it is understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention. The scope of the present invention is not limited to the detailed description above, but should be attributed to the claims.

Claims

1. A photovoltaic module silicone adhesive, It is characterized in that The invention comprises, by weight, 100 parts of α,ω-dihydroxypolydimethylsiloxane, 35-55 parts of methylphenyl silicone oil, 150-200 parts of filler, 25-45 parts of crosslinking agent and curing agent, 1-5 parts of crosslinking agent, 2-4 parts of coupling agent and 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.

1.

2. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that The filler is selected from one or more of active sodium calcium carbonate, ultrafine light calcium carbonate, silicon powder, quartz powder, talcum powder and mica powder.

3. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that The cross-linking curing agent is prepared by mixing vinyl tributylidene oxime siloxane and ethyl orthosilicate in a mass ratio of 1: (10-30).

4. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that The coupling agent is prepared by mixing bisaminosilane oligomer and aminoethylaminopropyltrimethoxysilane in a mass ratio of (2-4):

1.

5. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that The invention comprises, by weight, 100 parts of α,ω-dihydroxypolydimethylsiloxane, 40-55 parts of methylphenyl silicone oil, 160-190 parts of filler, 30-45 parts of crosslinking agent and curing agent, 2-4 parts of crosslinking agent, 2-4 parts of coupling agent and 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.

1.

6. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that In parts by weight, it includes: 100 parts of α,ω-dihydroxypolydimethylsiloxane, 40-50 parts of methylphenyl silicone oil, 160-170 parts of filler, 30-40 parts of crosslinking agent curing agent, 3-4 parts of crosslinking agent, 3-4 parts of coupling agent, 1-2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.

1.

7. The photovoltaic module silicone adhesive according to claim 1, It is characterized in that In parts by weight, it includes: 100 parts of α,ω-dihydroxypolydimethylsiloxane, 45 parts of methylphenyl silicone oil, 165 parts of filler, 35 parts of crosslinking agent curing agent, 3 parts of crosslinking agent, 3 parts of coupling agent, and 2 parts of catalyst dibutyltin dilaurate, wherein the crosslinking agent is prepared by mixing 3-aminopyridine and 3-chloropropyltrimethylsilane in a molar ratio of 1:2.

1.

8. A method for preparing the cross-linking agent according to claim 1, comprising the following reaction steps: firstly placing 3-aminopyridine into a reaction bottle under stirring conditions, and then dropwise adding 2.1 molar equivalents of 3-chloropropyltrimethylsilane into the 3-aminopyridine under nitrogen protection.

9. A method for preparing silicone adhesive for photovoltaic modules, include: 1) Weigh α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil, filler, crosslinking agent, curing agent, crosslinking agent, coupling agent and catalyst dibutyltin dilaurate respectively according to the weight percentage of claim 1; 2) α,ω-dihydroxypolydimethylsiloxane, methylphenyl silicone oil and filler are mixed evenly, after cooling, crosslinking agent curing agent and crosslinking agent are added, mixed evenly, vacuumized, and under the condition of vacuum degree of 0.06-0.08MPa, catalyst and coupling agent are added, mixed evenly, and the silicone glue is obtained.

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