CN112409980B - Polyorganosiloxane composition for packaging solar cell module and preparation method thereof - Google Patents
Polyorganosiloxane composition for packaging solar cell module and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- 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
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- C09J11/06—Non-macromolecular additives organic
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- C08L2203/204—Applications use in electrical or conductive gadgets use in solar cells
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- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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Abstract
The invention provides a polyorganosiloxane composition for packaging a solar cell module and a preparation method thereof, wherein the polyorganosiloxane composition comprises a component A and a component B, and the mass ratio of the component A to the component B is 1: 0.8-1.2; the component A comprises the following raw materials in parts by weight: 100 parts of vinyl-containing polyorganosiloxane, 1-5 parts of reinforcing filler, 0.5-5 parts of catalyst and 0.05-1 part of inhibitor; the component B comprises the following raw materials in parts by weight: 100 parts of vinyl-containing polysiloxane, 2-15 parts of hydrogen-containing polysiloxane, 1-10 parts of reinforcing filler, 1-10 parts of modulus regulator and 1-5 parts of adhesion promoter, wherein the adhesion promoter is a special long-chain polyfunctional silane coupling agent. The composition used as an encapsulant has excellent weather resistance and light transmittance, can overcome the defects of insufficient weather resistance and light transmittance of the existing encapsulant EVA, and can effectively improve the service life and the power generation efficiency of the solar cell module.
Description
Technical Field
The invention relates to the field of packaging agents, in particular to a polyorganosiloxane composition for packaging a solar cell module and a preparation method thereof.
Background
Solar energy has the advantages of no harm, large storage capacity, long service life and the like, and is rapidly developed in recent years. The core power generation component of the solar cell module is a solar cell, and the solar cell is easily affected by moisture, corrosive gas, external vibration and impact, so that the solar cell needs to be sealed and protected by using a sealant with good performance. Currently, the mainstream packaging material is EVA (ethylene vinyl acetate copolymer), which can meet the basic requirements of solar cell modules, but still has many disadvantages, such as poor weather resistance and high temperature and humidity resistance, slow degradation, yellowing and generation of acetic acid in long-term outdoor use. The acetic acid generated by degradation can corrode the solar cell, the long-term power generation efficiency of the cell is reduced, the degradation can damage the bonding interface, the long-term bonding performance of EVA is reduced, and the EVA and glass are layered. In addition, the transmittance of EVA to short-wavelength light is low, especially the transmittance of EVA is further reduced after humid heat aging, which affects the conversion efficiency of the solar cell module. Moreover, the current EVA packaging process is generally carried out for 20-40min at the temperature of 130-160 ℃, the hot pressing temperature is high, and the energy consumption is large.
The polyorganosiloxane takes-Si-O-Si-with high bonding energy and flexibility as a main chain, has excellent weather resistance, very wide use temperature, excellent heat resistance and moisture-heat aging resistance, can still keep good performance under long-term outdoor use conditions, cannot be decomposed, has good light transmittance, and is very suitable for packaging solar cells. Chinese patent CN 105765736 a discloses a silicone adhesive sheet for solar cell module encapsulation, wherein a silicone composition is prepared into a film and then used for encapsulation. CN 107245303 a discloses a silicone film with high ultraviolet transmittance and weather resistance, which is used for packaging solar cell modules. Firstly, because the adhesive film is a single-component composition, components required by a crosslinking reaction exist in one component, although an inhibitor is added to inhibit a curing reaction, the crosslinking reaction can still slowly progress along with time extension, so that the crosslinking density of the adhesive film is increased after the adhesive film is stored for a period of time, and the adhesive film has too high viscosity to fully fill gaps during heating and hot pressing, thereby influencing the packaging effect. Secondly, the polyorganosiloxane adhesive film is generally a partially crosslinked composition, and the surface is sticky, which brings inconvenience to the cutting and laying operation of the adhesive film. US 8847063B 2 discloses a method for encapsulating a solar cell module using a polyorganosiloxane polymer, the module having good light transmittance and weather resistance, but it requires two polysiloxane polymers for encapsulation, two compositions need to be coated and cured separately, the encapsulation process is complicated, and the adhesion is poor, and it is necessary to perform a surface treatment of a cell sheet with a special aid before encapsulation to achieve adhesion.
Disclosure of Invention
In view of the above, the present invention provides a polyorganosiloxane composition for solar cell module encapsulation and a preparation method thereof, which solve the above technical problems.
The technical scheme of the invention is realized as follows:
the polyorganosiloxane composition for packaging the solar cell module comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.8-1.2;
the component A comprises the following raw materials in parts by weight:
A 1 100 parts of a vinyl-containing polyorganosiloxane,
A 2 1-5 parts of reinforcing filler,
A 3 0.5 to 5 parts of catalyst,
A 4 0.05-1 part of inhibitor;
the component B comprises the following raw materials in parts by weight:
B 1 100 parts of a vinyl-containing polyorganosiloxane,
B 2 2-15 parts of hydrogen-containing polyorganosiloxane,
B 3 1-10 parts of reinforcing filler,
B 4 1-10 parts of modulus regulator,
B 5 1-5 parts of an adhesion promoter.
Furthermore, in the component A raw material, at least two vinyl groups in the structure of the vinyl-containing polyorganosiloxane are connected with silicon atoms, the viscosity is 1000-100000mPa.s at 25 ℃, the vinyl content is 0.06-6.0%, and the vinyl group is positioned at the tail end of a molecular chain, in the middle of the molecular chain or at the tail end and in the middle of the molecular chain.
Further, in the component A raw material, the reinforcing filler is fumed silica or precipitated silica, the surface of the reinforcing filler is subjected to hydrophobic treatment, the treating agent is dimethyldichlorosilane, hexamethyldisilazane or octamethylcyclotetrasiloxane, and the specific surface area of the reinforcing filler is 150-400 m- 2 (ii) in terms of/g. Preferably fumed silica treated by dimethyldichlorosilane and hexamethyldisilazane, and has a specific surface area of 200-300m 2 /g。
Further, the catalyst is 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex, and the platinum content is 100-3000 ppm.
Further, in the component A raw material, the inhibitor is at least one of tetramethyl divinyl disiloxane, 1,3,5, 7-tetravinyl-1, 3,5, 7-tetramethyl cyclotetrasiloxane, 1-ethynyl cyclohexanol, 2-methyl butynol, diethyl fumarate or diallyl maleate. Preferably at least one of 1-ethynylcyclohexanol, 2-methylbutynol and diallyl maleate.
Furthermore, in the component B raw material, at least two vinyl groups in the molecular structure of the vinyl-containing polyorganosiloxane are connected with silicon atoms, the viscosity is 1000-100000mPa.s at 25 ℃, the vinyl content is 0.06% -6.0%, and the vinyl groups are positioned at the tail end of a molecular chain, in the middle of the molecular chain or at the tail end and in the middle of the molecular chain simultaneously. Preferably, the viscosity at 25 ℃ is 5000-.
Furthermore, in the component B raw material, the hydrogen-containing polyorganosiloxane has the viscosity of 10-100mPa.s at 25 ℃, the hydrogen content of 0.10-1.5 percent, and the structure of the hydrogen-containing polyorganosiloxane at least contains three Si-H groups.
Further, in the component B raw material, the reinforcing filler is fumed silica or precipitated silica, the surface of the reinforcing filler is subjected to hydrophobic treatment, the treating agent is dimethyldichlorosilane, hexamethyldisilazane or octamethylcyclotetrasiloxane, and the specific surface area of the reinforcing filler is 150-400 m- 2 (iv) g. Preferably fumed silica treated by dimethyldichlorosilane and hexamethyldisilazane, and has a specific surface area of 200-300m 2 /g。
Furthermore, the modulus regulator is single-end hydrogen-containing silicone oil, the viscosity is 10-100mPa.s at 25 ℃, and the hydrogen content is 0.01% -0.20%.
Further, in the component B raw material, the adhesion promoter contains the following B 5a And B 5b At least one silane coupling agent:
wherein, B 5a The preparation method comprises the following steps: adding 50 parts by weight of tetramethyltetrahydrocyclotetrasiloxane and 0.5-2 parts by weight of 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex into a four-neck flask, dropwise adding 90-120 parts by weight of gamma- (methacryloyloxy) propyl trimethoxy silane under the nitrogen atmosphere, heating to 90-110 ℃ after dropwise adding is finished, and keeping the temperatureReacting for 2-4 hours, and distilling under reduced pressure after the reaction is finished to obtain a reaction product;
B 5b the preparation method comprises the following steps: adding 50 parts by weight of gamma- (methacryloyloxy) propyl trimethoxy silane, 30-50 parts by weight of 3-aminopropyl trimethoxy silane and 0.1-5 parts by weight of basic catalyst into a three-neck flask, raising the temperature to 50-70 ℃ under the atmosphere of nitrogen, reacting for 2-4 hours under the protection of nitrogen, and distilling under reduced pressure after the reaction is finished to obtain a reaction product.
Further, the preparation method of the component A comprises the following steps: according to the weight portion ratio, the vinyl-containing polyorganosiloxane A 1 Reinforcing filler A 2 Stirring at high speed for 40-60min under vacuum degree greater than 0.095MPa, removing bubbles, adding catalyst A 3 Inhibitor A 4 Stirring for 20-40min under vacuum degree greater than 0.095 Mpa;
the preparation method of the component B comprises the following steps: according to the weight portion ratio, the vinyl-containing polysiloxane B 1 Hydrogen-containing polyorganosiloxane B 2 Reinforcing filler B 3 Modulus modifier B 4 Stirring for 40-60min under vacuum degree greater than 0.095MPa, removing bubbles, adding adhesion promoter B 5 Stirring for 15-30min under the conditions that the vacuum degree is more than 0.095MPa and the temperature is lower than 40 ℃.
The invention also provides an addition type silicone rubber sealant resistant to damp-heat aging, which is prepared from the polyorganosiloxane composition for packaging the solar cell module, wherein the curing condition of the composition is that the composition is cured for 10-30 minutes at 70-100 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) aiming at the defects of the existing solar cell module packaging material, the invention provides a novel two-component polyorganosiloxane composition as a packaging agent, which has excellent weather resistance and light transmittance, can solve the defects of the existing packaging material that EVA weather resistance and light transmittance are not enough, and can effectively improve the service life and the power generation efficiency of a solar cell module.
(2) In addition, the composition adopts a special long-chain polyfunctional silane coupling agent as an adhesion promoter, has good adhesion performance before and after aging, can realize bottomless adhesion on an adhesion substrate, has little influence on the light transmittance of the composition, and still has high light transmittance after aging.
(3) The curing process of the dimeric siloxane composition is 70-100 ℃ for 10-30min, the curing temperature is low, and the energy consumption in the packaging process can be reduced.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
The polyorganosiloxane composition for packaging the solar cell module comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.8-1.2;
the component A comprises the following components (in parts by weight):
A 1 100 parts of a vinyl-containing polyorganosiloxane,
A 2 1-5 parts of reinforcing filler,
A 3 0.5 to 5 parts of catalyst,
A 4 0.05-1 part of inhibitor;
the component B comprises the following components (in parts by weight):
B 1 100 parts of a vinyl-containing polyorganosiloxane,
B 2 2-15 parts of hydrogen-containing polyorganosiloxane,
B 3 1-10 parts of reinforcing filler,
B 4 1-10 parts of modulus regulator,
B 5 1-5 parts of an adhesion promoter.
Example 1
Adhesion promoter B 5a The preparation of (1): 50 parts of tetramethyl tetrahydrocyclo tetrasiloxane and 1, 3-divinyl-1, 1,3, 3-tetramethyl disiloxane1.5 parts of alkyl platinum complex (platinum content 2000ppm) is added into a four-neck flask, 110 parts of gamma- (methacryloyloxy) propyl trimethoxy silane is dripped under nitrogen atmosphere, the temperature is raised to 95 ℃ after the dripping is finished, the temperature is kept for reaction for 3.5 hours, and reduced pressure distillation is carried out after the reaction is finished to obtain adhesion promoter B 5a 。
Adhesion promoter B 5b The preparation of (1): adding 50 parts of gamma- (methacryloyloxy) propyl trimethoxy silane, 35 parts of 3-aminopropyl trimethoxy silane and 0.5 part of triethylamine into a three-neck flask, raising the temperature to 60 ℃ under the atmosphere of nitrogen, reacting for 3 hours under the protection of nitrogen, and distilling under reduced pressure after the reaction is finished to obtain an adhesion promoter B 5b 。
Example 2:
the polyorganosiloxane composition for packaging the solar cell module comprises a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1: 1.
the component A comprises: 100 parts of double-end vinyl polyorganosiloxane with viscosity of 20000mPa.s at 25 ℃ and 250m of specific surface area 2 Adding 3 parts of fumed silica (reinforcing filler) with the surface treated by dimethyldichlorosilane into a planetary stirring kettle, stirring at a high speed for 50min under the condition that the vacuum degree is more than 0.095MPa, uniformly mixing, then adding 0.6 part of 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex (catalyst) with the platinum content of 2000ppm and 0.08 part of 1-ethynylcyclohexanol (inhibitor), stirring for 30min under the condition that the vacuum degree is more than 0.095MPa, and uniformly mixing.
The component B comprises: 100 parts of a double-terminal-vinyl-based polyorganosiloxane having a viscosity of 20000mPa.s at 25 ℃, 10 parts of a hydrogen-containing polyorganosiloxane having a viscosity of 80mPa.s at 25 and a hydrogen content of 0.12%, and a specific surface area of 250m 2 5 parts of gas-phase carbon dioxide silicon (reinforcing filler) with the surface treated by dimethyldichlorosilane and 1 part of single-end hydrogen-containing silicone oil (modulus regulator) with the hydrogen content of 0.08 percent are added into a planetary stirring kettle, stirred at high speed for 50min under the condition that the vacuum degree is more than 0.095MPa and mixed uniformly, and then added with the component B in the embodiment 1 5a 3 parts of adhesion promoter are stirred for 20min and mixed evenly under the conditions that the vacuum degree is more than 0.095Mpa and the temperature is lower than 40 ℃.
Example 3:
the polyorganosiloxane composition for packaging the solar cell module comprises a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1: 1.
the component A comprises: 100 parts of a double-terminal vinyl polyorganosiloxane having a viscosity of 20000mPa.s at 25 ℃ and a specific surface area of 250m 2 5 parts of fumed silica (reinforcing filler) which is treated by hexamethyldisilazane on the surface are added into a planetary stirring kettle, and are stirred at a high speed for 50min and mixed uniformly under the condition that the vacuum degree is more than 0.095MPa, and then 0.7 part of 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex (catalyst) with the platinum content of 2000ppm and 0.10 part of diallyl maleate (inhibitor) are added, and are stirred for 30min and mixed uniformly under the condition that the vacuum degree is more than 0.095 MPa.
The component B comprises: 100 parts of a double-terminal-vinyl-based polyorganosiloxane having a viscosity of 20000mPa.s at 25 ℃, 8 parts of a hydrogen-containing polyorganosiloxane having a viscosity of 60mPa.s at 25% and a hydrogen content of 0.15%, and a specific surface area of 250m 2 5 parts of fumed silica (reinforcing filler) with hexamethyldisilazane on the surface and 1.5 parts of single-end hydrogen-containing silicone oil (modulus regulator) with the hydrogen content of 0.08 percent are added into a planetary stirring kettle, stirred at high speed for 50min under the condition that the vacuum degree is more than 0.095MPa and mixed uniformly, and then the component B in the embodiment 1 is added 5b 3 parts of adhesion promoter is stirred for 25min and mixed evenly under the conditions that the vacuum degree is more than 0.095Mpa and the temperature is lower than 40 ℃.
Example 4:
the polyorganosiloxane composition for packaging the solar cell module comprises a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1: 1.
the component A comprises: 100 parts of a double-terminal vinyl polyorganosiloxane having a viscosity of 20000mPa.s at 25 ℃ and a specific surface area of 250m 2 Adding 3 parts of fumed silica (reinforcing filler) with the surface treated by dimethyldichlorosilane into a planetary stirring kettle, stirring at a high speed for 50min under the condition that the vacuum degree is more than 0.095MPa, uniformly mixing, then adding 0.5 part of 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex (catalyst) with the platinum content of 3000ppm and 0.08 part of 1-ethynylcyclohexanol (inhibitor), stirring for 30min under the condition that the vacuum degree is more than 0.095MPa, uniformly mixing。
The component B comprises: 100 parts of a double-terminal vinyl polyorganosiloxane having a viscosity of 10000mPa.s at 25 ℃, 8 parts of a hydrogen-containing polyorganosiloxane having a viscosity of 60mPa.s at 25 and a hydrogen content of 0.15%, and a specific surface area of 250m 2 Adding 5 parts of fumed silica (reinforcing filler) with the surface treated by dimethyldichlorosilane and 1 part of single-end hydrogen-containing silicone oil (modulus regulator) with the hydrogen content of 0.10 percent into a planetary stirring kettle, stirring at a high speed for 50min under the condition that the vacuum degree is more than 0.095MPa, uniformly mixing, and then adding B in example 1 5a 1.5 parts of adhesion promoter and B 5b 0.5 part of adhesion promoter, and stirring for 20min and mixing evenly under the conditions that the vacuum degree is more than 0.095Mpa and the temperature is lower than 40 ℃.
Comparative example 1:
the polyorganosiloxane composition comprises a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1: 1.
the component A comprises: 100 parts of double-end vinyl polyorganosiloxane with viscosity of 20000mPa.s at 25 ℃ and 250m of specific surface area 2 Adding 3 parts of fumed silica (reinforcing filler) with the surface treated by dimethyldichlorosilane into a planetary stirring kettle, stirring at a high speed for 50min under the condition that the vacuum degree is more than 0.095MPa, uniformly mixing, then adding 0.6 part of 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex (catalyst) with the platinum content of 2000ppm and 0.08 part of 1-ethynylcyclohexanol (inhibitor), stirring for 30min under the condition that the vacuum degree is more than 0.095MPa, and uniformly mixing.
The component B comprises: 100 parts of a double-terminal vinyl polyorganosiloxane having a viscosity of 10000mPa.s at 25 ℃, 10 parts of a hydrogen-containing polyorganosiloxane having a viscosity of 60mPa.s at 25 and a hydrogen content of 0.15%, and a specific surface area of 250m 2 5 parts of fumed silica (reinforcing filler) with the surface treated by dimethyldichlorosilane and 1 part of single-end hydrogen-containing silicone oil (modulus regulator) with the hydrogen content of 0.08 percent are added into a planetary stirring kettle, stirred at a high speed for 50min under the condition that the vacuum degree is more than 0.095MPa and mixed uniformly, then 3 parts of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane (adhesion promoter) are added, stirred for 20min under the conditions that the vacuum degree is more than 0.095MPa and the temperature is lower than 40 ℃ and mixed uniformly.
Test examples
1.1 test group: the A component and the B component prepared in examples 2 to 4 and comparative example 1 were mixed at a mass ratio of 1:1, coated on a 25X 25cm glass plate and covered with another glass plate of the same size, and the light transmittance was measured after curing at 90 ℃ for 30 min. Respectively coating the composition on a glass sheet and a battery sheet, paving a steel wire mesh, coating a layer of composition again, curing for 30min at 90 ℃, pulling the steel wire mesh open, testing the adhesion of the composition and a base material, and expressing the adhesion performance by the cohesive failure rate.
1.2 control group: taking an EVA adhesive film sample, heating at 140 ℃ for 30min in a curing process, and testing the light transmittance and the adhesiveness of the sample.
1.3 the samples of the test group and the control group were subjected to accelerated aging for 1000 hours at 85 ℃ and 85% humidity, respectively, and then the light transmittance and the adhesion property were measured again.
2. The test results were as follows:
the above results show that, when the polyorganosiloxane compositions of examples 2 to 4 were used for encapsulation, they had the advantages of excellent aging resistance, high light transmittance, and good adhesion, as compared with the control group.
Comparative example 1 in comparison, examples 2-4 used a special long chain multifunctional silane coupling agent as the adhesion promoter, had good adhesion properties before and after aging, and could achieve primer-free adhesion to the bonded substrate, while the adhesion promoter had little effect on the light transmittance of the composition and still had high light transmittance after aging.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A polyorganosiloxane composition for solar cell module encapsulation, characterized in that,
the adhesive comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.8-1.2;
the component A comprises the following raw materials in parts by weight:
A 1 100 parts of a vinyl-containing polyorganosiloxane,
A 2 1-5 parts of reinforcing filler,
A 3 0.5 to 5 parts of catalyst,
A 4 0.05-1 part of inhibitor;
the component B comprises the following raw materials in parts by weight:
B 1 100 parts of a vinyl-containing polyorganosiloxane,
B 2 2-15 parts of hydrogen-containing polyorganosiloxane,
B 3 1-10 parts of reinforcing filler,
B 4 1-10 parts of modulus regulator,
B 5 1-5 parts of an adhesion promoter;
the adhesion promoter comprises the following B 5a And B 5b At least one silane coupling agent:
the reinforcing filler is fumed silica or precipitated silica, the surface of the reinforcing filler is subjected to hydrophobic treatment, the treating agent is dimethyldichlorosilane, hexamethyldisilazane or octamethylcyclotetrasiloxane, the specific surface area is 150-400 m- 2 /g；
The catalyst is a 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane platinum complex, and the platinum content is 100-3000 ppm;
the modulus regulator is single-end hydrogen-containing silicone oil, the viscosity is 10-100mPa.s at 25 ℃, and the hydrogen content is 0.01% -0.20%.
2. The polyorganosiloxane composition for packaging a solar cell module as claimed in claim 1, wherein in the starting material of component A, the vinyl-containing polyorganosiloxane has a structure in which at least two vinyl groups are bonded to a silicon atom, a viscosity of 1000-100000mPa.s at 25 ℃, and a vinyl group content of 0.06-6.0%, the vinyl groups being located at the molecular chain terminals, in the middle of the molecular chain, or at both the molecular chain terminals and in the middle.
3. The polyorganosiloxane composition for solar cell module encapsulation according to claim 1, wherein in the component A raw material, the inhibitor is at least one of tetramethyldivinyldisiloxane, 1,3,5, 7-tetravinyl-1, 3,5, 7-tetramethylcyclotetrasiloxane, 1-ethynylcyclohexanol, 2-methylbutynol, diethyl fumarate or diallyl maleate.
4. The polyorganosiloxane composition for solar cell module encapsulation according to claim 1, wherein in the raw material of component B, at least two vinyl groups in the molecular structure of the vinyl-containing polyorganosiloxane are bonded to silicon atoms, the viscosity at 25 ℃ is 1000-100000mPa.s, and the vinyl group content is 0.06% -6.0%, the vinyl groups being located at the molecular chain ends, in the middle of the molecular chain, or at both the molecular chain ends and in the middle of the molecular chain.
5. The polyorganosiloxane composition for solar cell module encapsulation according to claim 1, wherein the hydrogen-containing polyorganosiloxane in the raw material of component B has a viscosity of 10 to 100mPa.s at 25 ℃ and a hydrogen content of 0.10 to 1.5%, and has a structure containing at least three Si-H groups.
6. The polyorganosiloxane composition for solar cell module encapsulation according to claim 1,
B 5a the preparation method comprises the following steps: 50 parts by weight of tetramethyltetrahydrocyclotetrasiloxane, 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxaneAdding 0.5-2 parts by weight of siloxane platinum complex into a four-neck flask, dropwise adding 90-120 parts by weight of gamma- (methacryloyloxy) propyl trimethoxy silane under the atmosphere of nitrogen, heating to 90-110 ℃ after dropwise adding, keeping the temperature for reacting for 2-4 hours, and carrying out reduced pressure distillation after the reaction is finished to obtain a reaction product;
B 5b the preparation method comprises the following steps: adding 50 parts by weight of gamma- (methacryloyloxy) propyl trimethoxy silane, 30-50 parts by weight of 3-aminopropyl trimethoxy silane and 0.1-5 parts by weight of basic catalyst into a three-neck flask, raising the temperature to 50-70 ℃ under the atmosphere of nitrogen, reacting for 2-4 hours under the protection of nitrogen, and distilling under reduced pressure after the reaction is finished to obtain a reaction product.
7. The polyorganosiloxane composition for solar cell module encapsulation according to claim 1 or 6, characterized in that the component A is prepared by a method comprising: according to the weight portion ratio, the vinyl-containing polyorganosiloxane A 1 Reinforcing filler A 2 Stirring at high speed for 40-60min under vacuum degree greater than 0.095MPa, removing bubbles, adding catalyst A 3 Inhibitor A 4 Stirring for 20-40min under vacuum degree greater than 0.095 Mpa;
the preparation method of the component B comprises the following steps: according to the weight portion ratio, the vinyl-containing polysiloxane B 1 Hydrogen-containing polyorganosiloxane B 2 Reinforcing filler B 3 Modulus modifier B 4 Stirring for 40-60min under vacuum degree greater than 0.095MPa, removing bubbles, adding adhesion promoter B 5 Stirring for 15-30min under the conditions that the vacuum degree is more than 0.095MPa and the temperature is lower than 40 ℃.
8. An addition type silicone rubber sealant resistant to wet heat aging, characterized by being obtained from the polyorganosiloxane composition for solar cell module encapsulation according to any one of claims 1 to 7, which is cured at a temperature of 70 to 100 ℃ for 10 to 30 minutes.
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