A high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules and its application

Abstract

The present invention relates to a high-transmittance, highly weather-resistant resin for lightweight photovoltaic modules and its applications. The resin comprises an unmodified epoxy acrylic resin, a modified epoxy acrylic resin, a solid acrylic epoxy resin, a polyurethane acrylic resin, an acrylic monomer, a photoinitiator, a thermal initiator, and an additive. The present invention introduces a highly weather-resistant polyurethane acrylic resin into the system and combines it with a highly weather-resistant acrylic monomer to produce a resin with a well-matched refractive index. The resulting front panel exhibits excellent transmittance, extremely low haze, strength, and weather resistance, and has promising application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightweight photovoltaic modules, and in particular relates to a high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules and applications thereof. Background Art

[0002] At present, large industrial buildings with lightweight insulated roof structures pose a challenge to traditional glass crystalline silicon photovoltaic (PV) systems due to their insufficient load-bearing capacity. In the field of BIPV (building integrated photovoltaics), the hidden danger of double-sided glass causing excessive weight of components has not been solved. In the same situation, the share of electric vehicles (EVs) in the entire automotive market has been increasing. At this stage, VIPV (vehicle integrated photovoltaics) allows electric vehicles to be charged during the day and off-grid; therefore, the electricity generated can be used to extend the driving range of electric vehicles and reduce the number of charging stations / times. However, most VIPV products are aimed at panoramic photovoltaic roofs, with glass as the front panel material and a mass of more than 15kg / m 2 In this case, a glass-glass front structure is not suitable in this regard, as the extensive use of glass would significantly increase the weight of the vehicle and raise safety issues.

[0003] At present, there are many front panel materials developed for lightweight components on the market. Chinese patent CN115466565A selects polyurethane acrylic resin, monomer, initiator and curing agent, coats the resin on the surface of glass fiber cloth, and prepares a lightweight component packaging front panel through a two-step method of light curing + heat curing. The packaging front panel has excellent weather resistance and UV resistance due to the introduction of polyurethane acrylic resin, but its heat resistance is general, and the refractive index of the polyurethane acrylic resin system is generally below 1.47, while the refractive index of conventional electronic-grade glass fiber products is around 1.55. The mismatch between the refractive indices of the two will lead to high haze, reduced transmittance, and the risk of delamination after aging. If products made of low-dielectric glass fiber are selected, although the refractive index can match the resin, the transmittance and haze will be improved, but the price is high and the strength of low-dielectric glass fiber products is poor, which will also affect subsequent use. Chinese patent CN118048016B selects epoxy resin and corresponding curing agent in the form of prepreg to prepare lightweight front panel prepreg. Due to the introduction of epoxy resin, the formula has good heat resistance and mechanical strength. However, pure epoxy resin has limited thickness resistance and maximum light transmittance due to the presence of benzene rings, and there is also a risk of failure after aging. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules and its application, which meets the requirements of high weather resistance, high heat resistance and high transmittance while matching the refractive index of electronic-grade glass fiber products and having excellent performance after aging.

[0005] The present invention provides a high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules, which comprises the following components in parts by mass:

[0006] 15-35 parts of unmodified epoxy acrylic resin;

[0007] 15-35 parts of modified epoxy acrylic resin;

[0008] 5-10 parts of solid acrylic epoxy resin;

[0009] 20-35 parts of polyurethane acrylic resin;

[0010] 15-30 parts of acrylic acid monomer;

[0011] Photoinitiator 0-3 parts;

[0012] Thermal initiator 0-3 parts;

[0013] 0.5-3 parts of additives;

[0014] The photoinitiator and the thermal initiator are not 0 at the same time.

[0015] Preferably, the unmodified epoxy acrylic resin is one or more of difunctional bisphenol A epoxy acrylic resin, difunctional aliphatic epoxy acrylic resin, and trifunctional aliphatic epoxy acrylic resin.

[0016] Preferably, the modified epoxy acrylic resin is one or more of difunctional methyl nadic anhydride modified epoxy acrylic resin, difunctional amine modified bisphenol A epoxy acrylate, ethylene oxide modified acrylic resin, and oxetane modified epoxy acrylic resin.

[0017] Preferably, the solid acrylic epoxy resin has an epoxy equivalent of 450-800 g / eq and a molecular weight of 10,000-30,000 g / mol.

[0018] Preferably, the polyurethane acrylic resin is one or more of a difunctional aliphatic polyurethane acrylic resin, a trifunctional aliphatic polyurethane acrylic resin, and a multifunctional polyurethane acrylic resin.

[0019] Preferably, the acrylic monomer is one or more of o-phenylphenethoxyethyl acrylate (OPPEOA), isobornyl acrylate (IBOA), 2-phenoxyethyl acrylate (2-PEA), methyl isobornyl acrylate (IBOMA), dicyclopentyl methacrylate (HDCPMA), 1,6-hexanediol diacrylate (HDDA), (10) ethoxylated bisphenol A diacrylate (BPA (10) EODA), (2) ethoxylated bisphenol A diacrylate (BPA (2) EODA), and (3) ethoxylated bisphenol A diacrylate (BPA (3) EODA).

[0020] Preferably, the photoinitiator is one or more of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO), 1-hydroxy-cyclohexyl-phenyl ketone (184), 2-hydroxy-2-methyl-1-phenylpropanone (1173), 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester (TPO-L), and benzophenone (BP).

[0021] Preferably, the thermal initiator is one or more of Trigonox301, Trigono101, and TBPO.

[0022] Furthermore, the auxiliary agent includes one or more of an adhesion promoter, an ultraviolet absorber, an antioxidant, and a wetting agent.

[0023] Furthermore, the adhesion promoter is a phosphate adhesion promoter.

[0024] Furthermore, the ultraviolet absorber is one or more of UV400, UV329, UV123, UV384, UV1164, and UV5411.

[0025] Furthermore, the antioxidant is one or more of 1010, 168, DLTDP, DSTDP, 1790, and 1076.

[0026] Furthermore, the wetting agent is one of BYK333, BYK323, BYK345, tego4100, and tego2100.

[0027] The present invention also provides an application of a high-transmittance and high-weather-resistant resin for a lightweight photovoltaic module in the preparation of a photovoltaic module front plate.

[0028] Furthermore, the preparation steps include:

[0029] The resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is then cured by a curing device to obtain a high-transmittance, high-weather-resistant photovoltaic module front plate.

[0030] Furthermore, the refractive index of the unmodified epoxy acrylic resin, the modified epoxy acrylic resin, the solid acrylic epoxy resin, and the polyurethane acrylic resin after mixing is between 1.50 and 1.57.

[0031] Furthermore, the refractive index of the acrylic monomer after mixing is between 1.50 and 1.57.

[0032] Preferably, the glass fiber cloth is one of a mixed woven cloth of low-dielectric glass fiber yarn and electronic-grade glass fiber yarn, and a woven cloth of electronic-grade glass fiber yarn. The refractive index of the mixed woven cloth is 1.51-1.53, and the refractive index of the electronic-grade glass fiber yarn woven cloth is 1.55.

[0033] Preferably, the fiberglass cloth model is one or more of 2116, mixed 2116, 1506, mixed 1506, 7628, mixed 7628, 7667, and mixed 7667.

[0034] Preferably, the curing device is one or more of a light curing device and a heat curing device.

[0035] Preferably, the wavelength of the light curing equipment is 365nm and the light intensity is 5w / cm 2 .

[0036] Preferably, the heat curing equipment is a vacuum hot press with a pressure of 15T and a curing temperature of 145°C.

[0037] Beneficial effects

[0038] (1) The present invention combines four resins with different refractive indices, weather resistance, strength, and heat resistance, namely, unmodified epoxy acrylic resin, modified epoxy acrylic resin, solid acrylic epoxy resin, and polyurethane acrylic resin, with acrylic monomers to produce resins with different refractive indices, high transmittance, and high weather resistance for use in the preparation of front panels. This overcomes the advantages of traditional acrylic resins, such as low refractive index and poor strength, and epoxy resins, such as poor weather resistance and poor brittleness, and perfectly combines the two.

[0039] (2) The high-transmittance, high-weather-resistant front panel prepared by the resin of the present invention has higher light transmittance, lower haze and strength, and excellent weather resistance compared to conventional lightweight component front panels.

[0040] (3) The present invention regulates the refractive index of the glass fiber cloth by mixing and weaving the glass fiber cloth and significantly reduces the cost, making it more compatible with the refractive index of the resin.

[0041] (4) The present invention introduces a highly weather-resistant polyurethane acrylic resin into the system and matches it with a highly weather-resistant acrylic monomer to obtain a resin with a good refractive index matching. The prepared front panel has excellent light transmittance, extremely low haze, strength and weather resistance, and has good application prospects. DETAILED DESCRIPTION

[0042] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0043] Example 1

[0044] The high-transmittance and high-weather-resistant resin formula in this embodiment is: 15 parts of unmodified epoxy acrylic resin, 15 parts of modified epoxy acrylic resin, 10 parts of solid acrylic epoxy resin, 35 parts of polyurethane acrylic resin, 2 parts of photoinitiator, 0.5 parts of auxiliary agent and 22.5 parts of acrylic monomer. After high-speed stirring and vacuum degassing, the mixed resin has a refractive index of 1.528.

[0045] Among them, the epoxy acrylic resin is Sartomer CN120TFN;

[0046] The modified epoxy acrylic resin is a bifunctional methyl nadic anhydride modified epoxy acrylic resin;

[0047] The solid acrylic epoxy resin has an epoxy equivalent weight of 450 g / eq and a molecular weight of 30,000 g / mol;

[0048] The polyurethane acrylic resin is a mixture of Sartomer CN963NS and Sartomer CN8885 NS in a mass ratio of 4:1;

[0049] The photoinitiator is TPO;

[0050] The additive is a mixture of phosphate adhesion promoter (GA2600Y), UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0051] The acrylic monomer is a mixture of dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1.

[0052] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is then passed through a 365nm light with an intensity of 5w / cm 2 The light-curing equipment is used for curing to obtain a high-transmittance and high-weather-resistant front panel.

[0053] Example 2

[0054] The same procedures as in Example 1 were followed except that the unmodified epoxy acrylic resin and the polyurethane acrylic resin in Example 1 were adjusted to 25 parts and 25 parts, respectively. The refractive index of the mixed resins was 1.539.

[0055] Example 3

[0056] The mixture was the same as in Example 1 except that the unmodified epoxy acrylic resin was adjusted to 35 parts, the polyurethane acrylic resin was adjusted to 20 parts, and the acrylic monomer was adjusted to 17.5 parts. The refractive index of the mixed resin was 1.553.

[0057] Example 4

[0058] The same procedures as in Example 1 were employed except that the modified epoxy acrylic resin and the polyurethane acrylic resin in Example 1 were adjusted to 25 parts and 25 parts, respectively. The refractive index of the mixed resins was 1.531.

[0059] Example 5

[0060] The modified epoxy acrylic resin in Example 1 was adjusted to 35 parts, the polyurethane acrylic resin was adjusted to 15 parts, and the acrylic monomer was adjusted to 17.5 parts. The rest was the same as in Example 1. The refractive index of the mixed resin was 1.543.

[0061] Example 6

[0062] The reaction mixture was the same as in Example 1 except that the photoinitiator was adjusted to 3 parts and the acrylic acid monomer was adjusted to 21.5 parts. The refractive index of the mixed resin was 1.530.

[0063] Example 7

[0064] The reaction mixture was the same as in Example 1 except that the auxiliary agent was adjusted to 3 parts and the acrylic acid monomer was adjusted to 20 parts. The refractive index of the mixed resin was 1.525.

[0065] Example 8

[0066] The formula of the high-transmittance and high-weather-resistant resin is the same as that in Example 1, except that the thermal initiator Trigonox301 is replaced by the photoinitiator TPO in Example 1.

[0067] The curing was changed to thermal curing, and the thermal curing equipment was a vacuum hot press with a pressure of 15T and a curing temperature of 145°C.

[0068] Example 9

[0069] The formula of the high-transmittance and high-weather-resistant resin is the same as that of Example 1, except that 2 parts of the photoinitiator TPO in Example 1 are replaced by 1 part of TPO and 1 part of the thermal initiator Trigonox301.

[0070] The curing was changed to light curing first and then thermal curing, first through 365nm, 5w / cm 2 The product is cured by light curing equipment, and then by vacuum hot press with heat curing equipment, pressure 15T and curing temperature 145℃.

[0071] Example 10

[0072] The method is the same as that in Example 1 except that the unmodified epoxy acrylic resin Sartomer CN120TFN in Example 1 is replaced by Sartomer CN104A80NS. The refractive index of the mixed resin is 1.521.

[0073] Example 11

[0074] The method is the same as that in Example 1 except that the unmodified epoxy acrylic resin Sartomer CN120TFN in Example 1 is replaced by Sartomer CN2602. The refractive index of the mixed resin is 1.533.

[0075] Example 12

[0076] Except that the unmodified epoxy acrylic resin Sartomer CN120TFN in Example 1 is replaced by Songda SD7209, the rest is the same as Example 1, and the refractive index of the mixed resin is 1.525.

[0077] Example 13

[0078] The method is the same as that in Example 1 except that the unmodified epoxy acrylic resin Sartomer CN120TFN in Example 1 is replaced by Changxing 629-100-TF. The refractive index of the mixed resin is 1.529.

[0079] Example 14

[0080] The process is the same as in Example 1 except that the bifunctional methyl nadic anhydride-modified epoxy acrylic resin is replaced by bifunctional amine-modified bisphenol A epoxy acrylate. The refractive index of the mixed resin is 1.534.

[0081] Example 15

[0082] The process is the same as in Example 1 except that the bifunctional methyl nadic anhydride-modified epoxy acrylic resin in Example 1 is replaced by oxetane-modified epoxy acrylic resin. The refractive index of the mixed resin is 1.514.

[0083] Example 16

[0084] The process was the same as in Example 1 except that the epoxy equivalent of the solid acrylic epoxy resin in Example 1 was adjusted to 600 g / eq and the molecular weight was 20,000 g / mol. The refractive index of the mixed resin was 1.521.

[0085] Example 17

[0086] The same procedures as in Example 1 were employed except that the mixture of polyurethane acrylic resins Sartomer CN963NS and Sartomer CN8885 NS at a mass ratio of 4:1 in Example 1 was replaced by a mixture of Sartomer CN9893NS and Sartomer CN9276 at a mass ratio of 5:1. The refractive index of the mixed resin was 1.522.

[0087] Example 18

[0088] The method is the same as that in Example 1 except that the mixture of polyurethane acrylic resins Sartomer CN963NS and Sartomer CN8885 NS in a mass ratio of 4:1 in Example 1 is replaced by Sartomer CN9014NS. The refractive index of the mixed resin is 1.524.

[0089] Example 19

[0090] The method is the same as that in Example 1 except that the mixture of polyurethane acrylic resins Sartomer CN963NS and Sartomer CN8885 NS in a mass ratio of 4:1 in Example 1 is replaced by Songda SD7543. The refractive index of the mixed resin is 1.526.

[0091] Example 20

[0092] The same method as in Example 1 is used except that the mixture of polyurethane acrylic resins Sartomer CN963NS and Sartomer CN8885NS at a mass ratio of 4:1 in Example 1 is replaced by Changxing DR-U331. The refractive index of the mixed resin is 1.524.

[0093] Example 21

[0094] Except that the photoinitiator TPO in Example 1 is replaced by 184, the rest is the same as Example 1. The refractive index of the mixed resin is 1.528.

[0095] Example 22

[0096] Except that the photoinitiator TPO in Example 1 is replaced by 1173 and 184 mixed in a mass ratio of 1:1, the rest is the same as Example 1. The refractive index of the mixed resin is 1.528.

[0097] Example 23

[0098] Except that the thermal initiator Trigonox301 in Example 8 was replaced by TBPO, the rest was the same as Example 1. The refractive index of the mixed resin was 1.528.

[0099] Example 24

[0100] The same as in Example 1 except that the mixture of auxiliary agents phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1 in Example 1 was replaced by a mixture of phosphate adhesion promoter, UV329, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1 was used. The refractive index of the mixed resin was 1.528.

[0101] Example 25

[0102] The preparation method is the same as that of Example 1, except that the mixture of the auxiliary agents phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1 in Example 1 is replaced by a mixture of phosphate adhesion promoter, UV5411, antioxidant 168, and wetting agent tego4100 in a mass ratio of 2:1:1:3. The refractive index of the mixed resin is 1.528.

[0103] Example 26

[0104] The same method as in Example 1 was used except that the mixture of acrylic monomers dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1 in Example 1 was replaced by methyl isobornyl acrylate (IBOMA). The refractive index of the mixed resin was 1.501.

[0105] Example 27

[0106] The same method as in Example 1 was used except that the mixture of acrylic monomers dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1 in Example 1 was replaced by a mixture of o-phenylphenethoxyethyl acrylate (OPPEOA) and 2-phenoxyethyl acrylate (2-PEA) in a mass ratio of 1:1. The refractive index of the mixed resin was 1.544.

[0107] Example 28

[0108] The same method as in Example 1 was used except that the mixture of acrylic monomers dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1 in Example 1 was replaced by (3) ethoxylated bisphenol A diacrylate (BPA(3)EODA). The refractive index of the mixed resin was 1.528.

[0109] Example 29

[0110] Except that the electronic cloth 2116 in Example 1 is replaced by 1506, the rest is the same as Example 1.

[0111] Example 30

[0112] Except that the electronic cloth 2116 in Example 1 is replaced by 7667, the rest is the same as Example 1.

[0113] Example 31

[0114] Except that the electronic cloth 2116 in Example 1 is replaced by mixed 2116 (refractive index 1.51), the rest is the same as Example 1.

[0115] Example 32

[0116] Except that the electronic cloth 2116 in Example 1 is replaced by mixed 2116 (refractive index 1.53), the rest is the same as Example 1.

[0117] Example 33

[0118] Except that the electronic cloth 2116 in Example 1 is replaced by mixed 7667 (refractive index 1.51), the rest is the same as Example 1.

[0119] Example 34

[0120] Except that the electronic cloth 2116 in Example 1 is replaced by mixed 7667 (refractive index 1.53), the rest is the same as Example 1.

[0121] Comparative Example 1

[0122] The formula is: 65 parts of polyurethane acrylic resin, 2 parts of photoinitiator, 3 parts of auxiliary agent, and 30 parts of acrylic monomer. After high-speed stirring and vacuum degassing, a highly weather-resistant resin is obtained. The refractive index of the resin is 1.477.

[0123] The polyurethane acrylic resin is a mixture of Sartomer CN963NS and Sartomer CN8885 NS in a mass ratio of 4:1;

[0124] The photoinitiator is TPO;

[0125] The additive is a mixture of phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0126] The acrylic monomer is a mixture of dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1.

[0127] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is passed through a 365nm light with an intensity of 5w / cm 2 The front plate is cured by a light curing device to obtain a front plate.

[0128] Comparative Example 2

[0129] The reaction mixture was the same as that in Comparative Example 1 except that the acrylic acid monomer in Comparative Example 1 was replaced by a mixture of methyl isobornyl acrylate (IBOMA) and 1,6-hexanediol diacrylate (HDDA) in a mass ratio of 1:1. The refractive index of the resin was 1.447.

[0130] Comparative Example 3

[0131] Except that the electronic cloth 2116 in comparative example 1 is replaced by the mixed 2116 with a refractive index of 1.51, the rest is the same as comparative example 1.

[0132] Comparative Example 4

[0133] The resin formula in this comparative example is: 25 parts of unmodified epoxy acrylic resin, 25 parts of modified epoxy acrylic resin, 15 parts of solid acrylic epoxy resin, 2 parts of photoinitiator, 3 parts of auxiliary agent and 30 parts of acrylic monomer. After high-speed stirring and vacuum degassing, the refractive index of the resin is 1.562.

[0134] Among them, the epoxy acrylic resin is Sartomer CN120TFN;

[0135] The modified epoxy acrylic resin is a difunctional methyl nadic anhydride modified epoxy acrylic resin;

[0136] The solid acrylic epoxy resin has an epoxy equivalent weight of 450 g / eq and a molecular weight of 30,000 g / mol;

[0137] The photoinitiator is TPO;

[0138] The additive is a mixture of phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0139] A mixture of acrylic monomers dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1.

[0140] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is passed through a 365nm light with an intensity of 5w / cm 2 The front plate is cured by a light curing device to obtain a front plate.

[0141] Comparative Example 5

[0142] The formula is: 65 parts of unmodified epoxy acrylic resin, 2 parts of photoinitiator, 3 parts of auxiliary agent, and 30 parts of acrylic monomer. After high-speed stirring and vacuum degassing, a resin is obtained. The refractive index of the resin is 1.559.

[0143] Among them, the epoxy acrylic resin is Sartomer CN120TFN;

[0144] The photoinitiator is TPO;

[0145] The additive is a mixture of phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0146] The acrylic monomer is a mixture of dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1.

[0147] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is passed through a 365nm light with an intensity of 5w / cm 2 The front plate is cured by a light-curing device to obtain a front plate.

[0148] Comparative Example 6

[0149] The formula is: 65 parts of modified epoxy acrylic resin, 2 parts of photoinitiator, 3 parts of auxiliary agent, and 30 parts of acrylic monomer. After high-speed stirring and vacuum degassing, a resin is obtained. The refractive index of the resin is 1.564.

[0150] Wherein, the modified epoxy acrylic resin is a difunctional methyl nadic anhydride modified epoxy acrylic resin;

[0151] The photoinitiator is TPO;

[0152] The additive is a mixture of phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0153] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is passed through a 365nm light with an intensity of 5w / cm 2 The front plate is cured by a light curing device to obtain a front plate.

[0154] Comparative Example 7

[0155] The formula is: 65 parts of solid acrylic epoxy resin, 2 parts of photoinitiator, 3 parts of auxiliary agent, and 30 parts of acrylic monomer. After high-speed stirring and vacuum degassing, a resin is obtained. The refractive index of the resin is 1.553.

[0156] Among them, the solid acrylic epoxy resin has an epoxy equivalent of 450g / eq and a molecular weight of 30,000g / mol;

[0157] The photoinitiator is TPO;

[0158] The additive is a mixture of phosphate adhesion promoter, UV400, antioxidant 1010, and wetting agent BYK333 in a mass ratio of 1:1:1:1;

[0159] The acrylic monomer is a mixture of dicyclopentyl methacrylate (HDCPMA) and (10) ethoxylated bisphenol A diacrylate (BPA(10)EODA) in a mass ratio of 1:1.

[0160] The glass fiber cloth is selected from electronic cloth 2116 (refractive index 1.55), and the resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is passed through a 365nm light with an intensity of 5w / cm 2 The front plate is cured by a light curing device to obtain a front plate.

[0161] The performance test methods of the lightweight component front plates and components prepared therefrom in the embodiments and comparative examples are as follows:

[0162] Visible light transmittance and haze: GB / T2410-2008;

[0163] Yellowing value: GB / T 39822-2021;

[0164] Module power, DH test, and UV aging test: IEC 61215-2-2021. The DH test is the aging test hours of the module under 85°C and 85% ambient humidity conditions.

[0165] Table 1 Test results of high transmittance and high weather resistance front panels and their lightweight components

[0166] Serial number Initial front panel transmittance / % Initial front plate haze / % Lightweight module power / W (72 version) Transmittance of front panel DH2000 / % Front panel DH2000 rear haze / % The front panel turns yellow after DH2000 / △Yi Transmittance of the front panel after UV aging 300Kwh / % Front panel haze after UV aging 300Kwh / % The front panel turns yellow after 300Kwh UV aging / △Yi Component power attenuation after DH2000 / % 300Kwh lightweight component power attenuation after UV aging / % Comparative Example 1 88.83 85.88 487 88.14 88.76 1.58 87.72 87.22 0.42 1 1 Comparative Example 2 88.76 89.44 482 87.93 90.14 1.68 87.98 91.23 1.22 1.1 1.2 Comparative Example 3 88.56 79.55 488 88.12 80.12 1.77 88.01 82.46 0.99 1.1 0.8 Comparative Example 4 90.56 12.66 522 85.22 39.27 5.45 82.11 44.45 8.67 6 7 Comparative Example 5 91.09 12.99 512 75.78 55.28 9.66 71.09 66.87 13.67 10 10 Comparative Example 6 90.77 13.56 534 81.11 67.23 7.32 80.11 58.52 12.82 9 10 Comparative Example 7 88.81 37.53 526 83.46 66.21 8.44 84.11 68.45 9.68 8 8 Example 1 90.55 17.67 522 90.24 18.32 0.55 90.18 17.98 0.32 0.8 1 Example 2 90.49 18.98 519 90.33 18.99 0.43 90.24 19.33 0.29 1 0.9 Example 3 90.32 19.55 531 90.11 20.32 0.67 90.11 20.01 0.57 0.7 0.8 Example 4 91.29 20.11 533 90.87 20.44 0.52 91.02 20.34 0.42 0.5 1 Example 5 91.88 15.98 529 90.66 16.41 0.56 91.45 16.23 0.66 0.8 0.6 Example 6 90.98 16.55 541 90.79 17.54 0.62 90.46 16.68 0.71 0.9 1 Example 7 91.24 14.56 536 90.66 14.91 0.45 90.99 15.21 0.43 1.1 0.5 Example 8 91.09 17.56 534 90.68 18.15 0.35 90.89 17.89 0.45 1.2 0.7 Example 9 90.88 17.24 529 90.24 18.32 0.75 90.65 17.99 0.58 1.1 1.2 Example 10 91.09 16.05 519 90.97 17.08 0.55 91.01 17.04 0.61 0.7 0.6 Example 11 92.03 17.54 528 91.66 18.22 0.77 91.39 17.85 0.71 0.8 0.5 Example 12 91.34 16.32 539 90.79 17.11 0.39 91.43 16.48 0.47 0.6 0.7 Example 13 90.77 12.09 538 90.48 13.29 0.41 90.34 12.43 0.42 1.1 0.6 Example 14 90.79 13.01 526 90.67 14.25 0.58 90.23 13.24 0.66 1.0 0.5 Example 15 91.34 14.43 534 90.95 16.66 0.43 90.95 16.54 0.51 0.7 0.7 Example 16 90.49 18.65 528 90.35 18.99 0.37 90.23 18.99 0.48 0.6 0.4 Example 17 91.44 13.56 541 91.03 14.16 0.62 90.76 14.10 0.65 0.5 0.8 Example 18 92.03 18.55 522 90.24 18.62 0.34 91.86 18.88 0.38 0.6 0.7 Example 19 91.45 17.45 539 90.24 18.32 0.48 90.82 18.16 0.55 0.8 0.6 Example 20 90.68 15.99 531 90.32 16.17 0.38 90.42 16.08 0.42 0.7 0.5 Example 21 90.73 18.44 531 90.22 18.66 0.47 90.37 18.75 0.51 1.2 0.4 Example 22 91.11 11.22 533 90.49 11.36 0.61 90.77 12.43 0.71 0.9 0.7 Example 23 90.11 12.56 534 90.01 13.25 0.58 90.01 12.98 0.62 0.8 0.8 Example 24 91.33 18.52 519 91.24 18.67 0.55 90.24 19.43 0.48 0.7 1.1 Example 25 91.49 17.92 529 91.21 18.25 0.62 90.78 18.02 0.44 1.2 1 Example 26 91.87 16.94 519 90.95 17.28 0.39 90.56 17.25 0.42 1.1 0.9 Example 27 90.39 15.87 520 90.22 16.15 0.77 90.21 16.77 0.43 0.9 0.8 Example 28 90.71 19.09 521 90.42 19.98 0.47 90.28 20.43 0.58 0.6 1 Example 29 91.31 16.38 528 90.82 17.37 0.53 90.83 16.84 0.49 0.8 0.6 Example 30 90.81 17.47 522 90.58 18.21 0.52 90.42 17.98 0.51 0.8 0.5 Example 31 90.66 12.99 526 90.54 13.66 0.48 90.38 14.55 0.38 0.7 0.7 Example 32 91.66 14.67 516 91.26 15.18 0.49 90.62 16.22 0.47 0.8 0.8 Example 33 92.01 19,54 544 91.88 19.56 0.41 91.32 20.01 0.81 0.6 1 Example 34 91.33 18.44 532 90.89 18.68 0.45 90.99 19.21 0.55 1.1 0.8

[0167] As shown in the table above, the high-transmittance, highly weather-resistant front panels and lightweight components prepared in Examples 1-34 exhibit excellent transmittance and weather resistance, as well as excellent refractive index and interface compatibility with the fiberglass cloth. After aging at DH2000 and 300 kWh, all performance characteristics show little degradation, and the resin-glass interface bond is robust. Comparative Examples 1-3 use a polyurethane acrylic resin as the matrix resin. While the resin exhibits excellent weather resistance, the significant refractive index deviation between it and the fiberglass cloth leads to excessive haze, which impedes light penetration, causing actual transmittance to fall below the theoretical value and impacting efficiency (significantly reducing module power). Comparative Example 4, without the addition of a polyurethane acrylic resin, exhibits significant degradation after aging despite excellent initial performance. Without the protection of a highly weather-resistant resin, the composite material exhibits significant degradation after aging, demonstrating that the inherent aging resistance of the epoxy resin's benzene rings is not effectively addressed. Comparative Examples 5-7, using epoxy acrylic, modified epoxy acrylic, and solid acrylic epoxy resins, respectively, produce composite materials. Again, performance deteriorates significantly after aging due to inherent issues with the epoxy resin.

[0168] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0169] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules, characterized by: By mass, it includes the following components: The photoinitiator and the thermal initiator are not 0 at the same time.

2. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The unmodified epoxy acrylic resin is one or more of difunctional bisphenol A epoxy acrylic resin, difunctional aliphatic epoxy acrylic resin, and trifunctional aliphatic epoxy acrylic resin.

3. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The modified epoxy acrylic resin is one or more of a difunctional methyl nadic anhydride modified epoxy acrylic resin, a difunctional amine modified bisphenol A epoxy acrylate, and an oxetane modified epoxy acrylic resin.

4. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The solid acrylic epoxy resin has an epoxy equivalent of 450-800 g / eq and a molecular weight of 10,000-30,000 g / mol.

5. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The polyurethane acrylic resin is one or more of a difunctional aliphatic polyurethane acrylic resin, a trifunctional aliphatic polyurethane acrylic resin, and a multifunctional polyurethane acrylic resin.

6. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The acrylic monomer is one or more of o-phenylphenethoxyethyl acrylate, isobornyl acrylate, 2-phenoxyethyl acrylate, methyl isobornyl acrylate, dicyclopentyl methacrylate, 1,6-hexanediol diacrylate, (10) ethoxylated bisphenol A diacrylate, (2) ethoxylated bisphenol A diacrylate, and (3) ethoxylated bisphenol A diacrylate.

7. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The photoinitiator is one or more of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 1-hydroxy-cyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropanone, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, and benzophenone; the thermal initiator is one or more of Trigonox301, Trigono101, and TBPO.

8. The high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules according to claim 1, characterized in that: The auxiliary agent includes one or more of an adhesion promoter, an ultraviolet absorber, an antioxidant, and a wetting agent.

9. Use of the high-transmittance and high-weather-resistant resin for lightweight photovoltaic modules as claimed in claim 1 in preparing a front plate of a photovoltaic module.

10. The use according to claim 9, characterized in that: The preparation steps include: The resin is coated on the surface of the glass fiber cloth to obtain a prepreg composite material; the prepreg composite material is then cured by a curing device to obtain a high-transmittance, high-weather-resistant photovoltaic module front plate.

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