High-water-resistance butyl sealant and preparation method thereof

Abstract

The invention relates to a high-water-resistance butyl sealant. The high-water-resistance butyl sealant is prepared from the following components: butyl rubber, medium molecular weight polyisobutene, silanized polyisobutene and inorganic filler. The high-water-resistance butyl sealant provided by the invention is excellent in weather resistance and water vapor barrier property, the post-curing strength can be improved, the preparation process is simple and safe, and the high-water-resistance butyl sealant is suitable for industrialization.

Description

Technical Field

[0001] The invention belongs to the field of polymer materials and relates to a high-water-resistance butyl sealant and a preparation method thereof. Background Art

[0002] Butyl sealant is an adhesive with butyl rubber (IIR) as the main material. The raw material butyl rubber is a synthetic rubber composed of isobutylene (97% to 99%) and a small amount of isoprene (1% to 3%). However, rubber itself does not have viscosity, so it needs to be mixed with polyisobutylene to improve viscosity, anti-aging, weather resistance, etc. The final butyl sealant has high molecular polarity, low unsaturated bond content, and low molecular chain activity, so it has good chemical stability and thermal stability. The molecular chain of butyl sealant is a straight chain, and the strength and cohesion of the material itself are mainly improved by adding fillers and increasing the molecular weight of butyl rubber. There are no polar groups in butyl sealant to participate in chemical cross-linking, and the high temperature resistance is average.

[0003] High Reactivity Polyisobutylene (HRPIB) is isobutylene (dimethylpropylene) obtained by purifying the C4 fraction of petroleum byproducts. When boron trifluoride is used as a catalyst, most of the double bonds at the end of the isobutylene molecules generated by the reaction are disubstituted double bonds (70% to 85%), followed by ternary substituted double bonds, and the least quaternary substituted double bonds. Low molecular weight polyisobutylene with a high α-terminal double bond content is high reactivity polyisobutylene (HRPIB), which plays an outstanding role in many application fields and can be used as an intermediate for the production of various derivatives. High reactivity polyisobutylene has the following characteristics: colorless, odorless, non-toxic; excellent compatibility with most hydrocarbon polymers and organic substances; excellent oxidation stability, good UV resistance, pure isobutylene polymer, and uniform chemical structure. It is often used to synthesize polyisobutylene amine substances and used as gasoline or diesel additives, but almost no one uses it in adhesives.

[0004] The rapid development of photovoltaic module technology has brought higher requirements for packaging materials, especially for new heterojunction (HIT / HJT) and perovskite modules. These modules are highly sensitive to water vapor, so sealants with excellent waterproof properties are required to ensure their long-term stability and efficiency. Traditional silicone deoxime glue and ordinary butyl glue no longer meet current needs in terms of water vapor barrier and electrical properties. The existing packaging materials have poor water vapor barrier properties, which causes the electronic components inside the module to corrode when exposed to water vapor in the air, resulting in reduced electrical performance and even affecting the life of the module. With the continuous development of the photovoltaic industry, the demand for efficient packaging materials is also growing. Summary of the invention

[0005] The purpose of the present invention is to provide a high-water-resistant butyl sealant with excellent weather resistance, water vapor barrier performance and bonding strength and a preparation method thereof in view of the deficiencies in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The first object of the present invention is to provide a high water-resistance butyl sealant, wherein the high water-resistance butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, and inorganic filler;

[0008] Wherein, the number average molecular weight of the medium molecular weight polyisobutylene is 100000 to 500000;

[0009] The structure of the silylated polyisobutylene is shown in formula (I):

[0010]

[0011] Wherein, n is 10-100;

[0012] X is a hydrolyzable group;

[0013] R 1 C 1 -C 12 Alkylene;

[0014] R' is -Si(CH 3 ) 2 -、 One of them.

[0015] Preferably, X is selected from C 1 -C 4 One of the alkoxy groups is preferably a methoxy group or an ethoxy group.

[0016] Preferably, the R 1 C 1 -C 8 Alkylene; preferably C 1 -C 6 Alkylene.

[0017] Preferably, the butyl rubber is selected from raw rubber Mooney viscosity ML 1+8 It is 46 to 56.

[0018] Preferably, the number average molecular weight of the medium molecular weight polyisobutylene is 120,000 to 150,000.

[0019] Preferably, the inorganic filler is one or more of talc, sericite powder, magnesium silicate, light calcium carbonate and kaolin, preferably a combination of sericite powder and / or talc, more preferably a combination of sericite powder and talc.

[0020] Preferably, the weight ratio of the sericite powder to the talc powder is 1:(0.1-2), preferably 1:(0.1-1), and more preferably 1:0.5.

[0021] Preferably, the components of the high-resistance water-resistant butyl sealant also include a reinforcing material, and the reinforcing material is one or more of carbon black, fumed silica, and nano-calcium carbonate, preferably carbon black.

[0022] Preferably, the components of the high-resistance water-resistant butyl sealant further include molecular sieves, and the molecular sieves are 3A to 5A molecular sieves, preferably 3A molecular sieves.

[0023] Preferably, the components of the high-resistance water-resistant butyl sealant also include an antioxidant, and the antioxidant is one or more of a phosphite antioxidant and a hindered phenol antioxidant, preferably antioxidant 1010 and / or antioxidant 168.

[0024] Preferably, the content of the silylated polyisobutylene is 10 to 40 parts by mass.

[0025] More preferably, the content of the silylated polyisobutylene is 15 to 30 parts.

[0026] Preferably, the content of the butyl rubber is 10 to 40 parts by mass.

[0027] More preferably, the content of the butyl rubber is 20 to 30 parts.

[0028] Preferably, the content of the medium molecular weight polyisobutylene is 5 to 30 parts by mass.

[0029] More preferably, the content of the medium molecular weight polyisobutylene is 10 to 20 parts.

[0030] Preferably, the content of the inorganic filler is 30 to 60 parts by mass.

[0031] More preferably, the content of the inorganic filler is 30 to 40 parts.

[0032] Preferably, the content of the reinforcing material is 1 to 15 parts by mass.

[0033] More preferably, the content of the reinforcing material is 1 to 10 parts.

[0034] Preferably, the content of the molecular sieve is 1 to 15 parts by mass.

[0035] More preferably, the content of the molecular sieve is 1 to 10 parts.

[0036] Preferably, the content of the antioxidant is 0.2 to 2 parts by mass.

[0037] More preferably, the content of the antioxidant is 0.6 to 1.6 parts.

[0038] Preferably, the high-resistance water-resistant butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc, carbon black, 3A molecular sieve, and antioxidant;

[0039] Wherein, the antioxidant is selected from antioxidant 1010 and / or antioxidant 168.

[0040] Preferably, the high-resistance water-resistant butyl sealant is composed of the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc, carbon black, 3A molecular sieve, and antioxidant.

[0041] Further preferably, in terms of mass percentage, the components of the high water-resistance butyl sealant include:

[0042] Components Mass percentage Butyl rubber 10~40 servings Medium molecular weight polyisobutylene 5~30 servings Silylated polyisobutylene 10~40 servings talcum powder 1~20 servings Sericite powder 10~40 servings Carbon Black 1~15 servings 3A molecular sieve 1~15 servings Antioxidant 1010 0.1~1 serving Antioxidant 168 0.1~1 serving .

[0043] Further preferably, in terms of mass percentage, the components of the high water-resistance butyl sealant include:

[0044] Components Mass percentage Butyl rubber 20~30 servings Medium molecular weight polyisobutylene 10~20 servings Silylated polyisobutylene 15~30 servings talcum powder 5-15 servings Sericite powder 15~30 servings Carbon Black 1~10 servings 3A molecular sieve 1~10 servings Antioxidant 1010 0.3~0.8 Antioxidant 168 0.3~0.8 .

[0045] The second object of the present invention is to provide a method for synthesizing silylated polyisobutylene as described in any one of the above items, comprising the following steps: heating highly active polyisobutylene, adding catalyst A and silane coupling agent to obtain silylated polyisobutylene;

[0046] Wherein, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II),

[0047]

[0048] The structural formula of the silane coupling agent is YR 1 -SiX 3 ;

[0049] X is a hydrolyzable group;

[0050] Y is a non-hydrolyzable group;

[0051] R 1 C 1 -C 12 Alkylene.

[0052] Preferably, X is selected from C 1 -C 4 One of the alkoxy groups is preferably a methoxy group or an ethoxy group.

[0053] Preferably, the R 1 C 1 -C 8 Alkylene; preferably C 1 -C 6 Alkylene.

[0054] Preferably, Y is a dimethylsilyl group.

[0055] Preferably, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300, preferably HRPIB2300.

[0056] Preferably, the synthesis is carried out in an organic solvent B, which is one or more of acetone, isopropanol, and petroleum ether, preferably isopropanol.

[0057] Preferably, the temperature is raised to 40-70°C, preferably 50-60°C.

[0058] Preferably, the catalyst A is an organic metal catalyst, preferably a platinum catalyst, more preferably one or more of chloroplatinic acid and a complex of chloroplatinic acid.

[0059] The third object of the present invention is to provide a method for synthesizing silylated polyisobutylene as described in any one of the above items, comprising the following steps:

[0060] S1: heating highly active polyisobutylene to a first temperature under acidic conditions, adding peracetic acid, and heating to a second temperature to obtain a first reaction mixture;

[0061] S2: adding catalyst C to the first reaction mixture under hydrogen conditions, and heating the mixture to a third temperature to obtain a second reaction mixture;

[0062] S3: adding catalyst D and silane coupling agent to the second reaction mixture to obtain silylated polyisobutylene;

[0063] Wherein, in the step S1, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II),

[0064]

[0065] In step S3, the structural formula of the silane coupling agent is ZR 1 -SiX 3 ;

[0066] X is a hydrolyzable group;

[0067] Z is a non-hydrolyzable group;

[0068] R 1 C 1 -C 12 Alkylene.

[0069] Preferably, X is selected from C 1 -C 4 One of the alkoxy groups is preferably a methoxy group or an ethoxy group.

[0070] Preferably, the R 1 C 1 -C 8 Alkylene; preferably C 1 -C 6 Alkylene.

[0071] Preferably, the Z is an isocyanate group.

[0072] Preferably, the silane coupling agent is one or more of 3-isocyanatepropyltriethoxysilane and 3-isocyanatepropyltrimethoxysilane.

[0073] Preferably, in step S1, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300, preferably HRPIB2300.

[0074] Preferably, the reaction of steps S1 and S2 is carried out in an organic solvent E, and the organic solvent E is one or more of acetone, isopropanol, and petroleum ether, preferably isopropanol.

[0075] Preferably, in step S1, the first temperature is 40-70°C, preferably 50-60°C.

[0076] Preferably, in step S1, the second temperature is 60-90°C, preferably 70-80°C.

[0077] Preferably, in step S2, the flow rate of hydrogen is 10-30 mL / min, preferably 20 mL / min.

[0078] Preferably, in step S2, the third temperature is 160-190°C, preferably 170-180°C.

[0079] Preferably, in step S2, the catalyst C is an inorganic salt catalyst, preferably an inorganic salt catalyst containing Pt and / or Pd, and more preferably one or more of chloroplatinic acid, a complex of chloroplatinic acid, palladium acetate, and a complex of palladium acetate.

[0080] Preferably, in step S3, the catalyst D is one of an organic metal catalyst, an amine catalyst, and a metal catalyst, preferably an organic metal catalyst, more preferably a platinum catalyst, and more preferably one or more of chloroplatinic acid and a complex of chloroplatinic acid.

[0081] Preferably, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is one or more of polyphenol polymerization inhibitors, quinone polymerization inhibitors, thiol polymerization inhibitors, and amine polymerization inhibitors, preferably a quinone polymerization inhibitor, and more preferably tetrachlorobenzoquinone.

[0082] Preferably, in step S3, a molecular sieve is also added, and the molecular sieve is 3A to 5A molecular sieve, preferably 5A molecular sieve.

[0083] A fourth object of the present invention is to provide a method for preparing the high water-resistance butyl sealant as described in any one of the above items, comprising the following steps:

[0084] (1) adding butyl rubber and medium molecular weight polyisobutylene into a kneader according to weight parts, heating, and kneading under the protection of inert gas, and then sequentially adding an antioxidant, an inorganic filler, and a reinforcing material into the kneader and continuing to knead;

[0085] (2) Then, the silanized polyisobutylene and the molecular sieve are added to the mixture obtained in step (1), the inert gas is turned off, and the mixture is evacuated for kneading, and the vacuum degree is controlled to be 0.08-0.1 MPa.

[0086] Preferably, before step (1), the method further comprises: drying and dehydrating the inorganic filler, the reinforcing material and the molecular sieve.

[0087] Preferably, the kneading temperature in step (1) is controlled to be 110-130° C. and the rotation speed is 20 r / min.

[0088] Preferably, the kneading time in step (1) is controlled to be 25 to 35 minutes, preferably 30 minutes.

[0089] Preferably, the kneading temperature in step (2) is controlled to be 130-150° C. and the rotation speed is 30 r / min.

[0090] Preferably, the kneading time in step (2) is controlled to be 35 to 45 minutes, preferably 40 minutes.

[0091] A fifth object of the present invention is to provide an application of a high-resistance water-resistant butyl sealant as described in any one of the above items or a product obtained according to the above preparation method in the field of photovoltaic modules.

[0092] Effects of the Invention

[0093] The high water-resistant butyl sealant prepared by the silanized polyisobutylene synthesized by the present invention has excellent water-resistant performance, effectively prevents water vapor penetration, improves water-resistant performance, and is particularly suitable for applications such as photovoltaic modules and medical rubber bottle stoppers that are sensitive to water vapor. Since the silanized polyisobutylene is terminated with siloxane at both ends, it can self-crosslink under humid conditions to form a network structure, thereby significantly improving the bonding strength and cohesion of the material and enhancing the bonding strength. The introduction of silanized polyisobutylene enables the high water-resistant butyl sealant to maintain good performance under various climatic conditions, including resistance to ultraviolet radiation aging performance, and improving weather resistance is particularly important for outdoor applications such as photovoltaic modules. In addition to photovoltaic modules and medical rubber bottle stoppers, silanized polyisobutylene can also be used as a modifier and additive for other high-performance rubber products, and has a wide range of application potential. In summary, the present invention improves water vapor barrier performance, bonding strength, weather resistance, chemical stability and thermal stability, increases high water resistance, increases cohesive strength, and provides a sealing solution with excellent performance for photovoltaic module edge protection and other high-performance rubber products. DETAILED DESCRIPTION

[0094] In order to make the technical solutions and beneficial effects of the present invention more clearly understood, the following is a detailed description by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0095] Butyl sealant is an internationally recognized polymer material with the best air tightness and water tightness. In view of the shortcomings of existing packaging materials in terms of water vapor barrier properties, the inventors have proposed a modification scheme through in-depth research, aiming to optimize the bonding performance and outdoor weather resistance of butyl sealant, while significantly improving its water vapor barrier performance. The present invention achieves a significant reduction in water vapor permeability by selecting a sealant composed of butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, molecular sieves (such as 3A molecular sieves), reinforcing materials (such as sericite powder and talcum powder), carbon black, antioxidants, etc. This high-resistance water-resistant butyl sealant can not only effectively prevent the internal electronic components of the component from corroding due to contact with water vapor in the air, thereby reducing electrical performance or affecting the life of the component, but also can show excellent weather resistance in outdoor environments, and resist the long-term effects of environmental factors such as ultraviolet rays, temperature changes and chemical corrosion. In addition, the high-resistance water-resistant butyl sealant of the present invention is easy to construct, and the post-curing strength can be improved after reacting with water.

[0096] As used herein, the term "and / or" refers to any one of the optional items or a combination of any two or more of the optional items.

[0097] As used herein, the term "comprising" or "including" means including the described elements, integers or steps, but does not exclude any other elements, integers or steps. In the present invention, when the term "comprising" or "including" is used, unless otherwise specified, the situation consisting of the described elements, integers or steps is also covered.

[0098] As used herein, the term "consisting of" is intended to exclude any element or combination of elements, and any element or combination of elements in any amount, that would alter the basic and novel characteristics of the present invention.

[0099] As used herein, the term "butyl rubber" is understood to mean homopolymers of isobutylene or copolymers of isobutylene and isoprene, which butyl rubber is included in the diene elastomers, as well as halogenated derivatives of these homopolymers and of copolymers of isobutylene and isoprene, in particular, the halogenated derivatives being generally brominated or chlorinated derivatives, for example, isobutylene rubber, copolymers of isobutylene and isoprene (IIR), brominated butyl rubbers, such as brominated isobutylene / isoprene copolymers (BIIR), chlorobutyl rubbers, such as chloroisobutylene / isoprene copolymers (CIIR), and mixtures of the latter.

[0100] As used herein, the term "filler" refers to any material used to enhance or modify the physical properties, impart certain processing properties, or reduce the cost of an elastomeric composition.

[0101] As used herein, the term "silane coupling agent" refers to a low molecular weight organic silicon compound with a special structure, which can chemically bond (couple) with organic and inorganic materials to increase the adhesion of the two materials.

[0102] As used herein, an "antioxidant" is a substance that, when present in a small amount in a polymer system, can retard or inhibit the oxidation process of the polymer, thereby preventing the aging of the polymer and extending its service life.

[0103] As used herein, "alkylene" refers to a straight or branched saturated divalent hydrocarbon group having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms, more preferably 1 to 6 carbon atoms. The alkylene group may be optionally substituted with at least one halogen substituent. Examples of the alkylene group may include methylene, ethylene, propylene, butylene, hexylene, and the like.

[0104] The first object of the present invention is to provide a high water-resistance butyl sealant, wherein the high water-resistance butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, and inorganic filler;

[0105] Wherein, the number average molecular weight of the medium molecular weight polyisobutylene is 100000 to 500000;

[0106] The structure of the silylated polyisobutylene is shown in formula (I):

[0107]

[0108] Wherein, n is 10-100;

[0109] X is a hydrolyzable group;

[0110] R 1 C 1 -C 12 Alkylene;

[0111] R' is -Si(CH 3 ) 2 -、 One of them.

[0112] In certain embodiments, X is selected from C 1 -C 4 One of the alkoxy groups.

[0113] In certain embodiments, X is selected from methoxy and ethoxy.

[0114] In certain embodiments, the R 1 C 1 -C 8 Alkylene.

[0115] In certain embodiments, the R 1 C 1 -C 6 Alkylene.

[0116] In certain embodiments, the butyl rubber is selected from raw rubber Mooney viscosity ML 1+8 It is 46 to 56.

[0117] In certain embodiments, the number average molecular weight of the medium molecular weight polyisobutylene is 120,000 to 150,000.

[0118] In certain embodiments, the inorganic filler is one or more of talc, sericite powder, magnesium silicate, light calcium carbonate, and kaolin.

[0119] In certain embodiments, the inorganic filler is a combination of sericite powder and / or talc powder.

[0120] In certain embodiments, the inorganic filler is a combination of sericite powder and talc powder.

[0121] In some embodiments, the weight ratio of the sericite powder to the talc powder is 1:(0.1-2), for example 1:0.1, 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1.0, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2.0, etc.

[0122] In certain embodiments, the weight ratio of the sericite powder to the talc powder is 1:(0.1-1).

[0123] In certain embodiments, the weight ratio of the sericite powder to the talc powder is 1:0.5.

[0124] In certain embodiments, the components of the high-resistance water-resistant butyl sealant further include a reinforcing material, and the reinforcing material is one or more of carbon black, fumed silica, and nano-calcium carbonate.

[0125] In certain embodiments, the reinforcing material is carbon black.

[0126] In certain embodiments, the components of the high-resistance water-resistant butyl sealant further include molecular sieves, and the molecular sieves are 3A to 5A molecular sieves.

[0127] In certain embodiments, the molecular sieve is a 3A molecular sieve.

[0128] In certain embodiments, the components of the high-resistance water-resistant butyl sealant further include an antioxidant, and the antioxidant is one or more of a phosphite antioxidant and a hindered phenol antioxidant.

[0129] In certain embodiments, the antioxidant is antioxidant 1010 and / or antioxidant 168.

[0130] In certain embodiments, the antioxidant is antioxidant 1010 and antioxidant 168.

[0131] In certain embodiments, the content of the silylated polyisobutylene is 10 to 40 parts by mass, for example, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, etc.

[0132] In certain embodiments, the content of the silylated polyisobutylene is 15 to 30 parts.

[0133] In certain embodiments, the content of butyl rubber is 10 to 40 parts by mass, for example, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, etc.

[0134] In certain embodiments, the content of the butyl rubber is 20 to 30 parts.

[0135] In certain embodiments, the content of the medium molecular weight polyisobutylene is 5 to 30 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, etc.

[0136] In certain embodiments, the content of the medium molecular weight polyisobutylene is 10 to 20 parts.

[0137] In certain embodiments, the content of the inorganic filler is 30 to 60 parts by weight, for example, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 ​​parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, etc.

[0138] In certain embodiments, the content of the inorganic filler is 30 to 40 parts.

[0139] In some embodiments, the content of the reinforcing material is 1 to 15 parts by mass, for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0140] In certain embodiments, the content of the reinforcing material is 1 to 10 parts.

[0141] In certain embodiments, the content of the molecular sieve is 1 to 15 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0142] In certain embodiments, the content of the molecular sieve is 1 to 10 parts.

[0143] In certain embodiments, the content of the antioxidant is 0.2 to 2 parts by mass, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, etc.

[0144] In certain embodiments, the content of the antioxidant is 0.6 to 1.6 parts.

[0145] In certain embodiments, the high-resistance water-resistant butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc, carbon black, 3A molecular sieve, and antioxidant;

[0146] Wherein, the antioxidant is selected from antioxidant 1010 and / or antioxidant 168.

[0147] In certain embodiments, the high-resistance water-resistant butyl sealant is composed of the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc, carbon black, 3A molecular sieve, and antioxidant.

[0148] In certain embodiments, the components of the high-resistance water-resistant butyl sealant include, by mass percentage:

[0149] Components Mass percentage Butyl rubber 10~40 servings Medium molecular weight polyisobutylene 5~30 servings Silylated polyisobutylene 10~40 servings talcum powder 1~20 servings Sericite powder 10~40 servings Carbon Black 1~15 servings 3A molecular sieve 1~15 servings Antioxidant 1010 0.1~1 serving Antioxidant 168 0.1~1 serving .

[0150] In certain embodiments, the components of the high-resistance water-resistant butyl sealant include, by mass percentage:

[0151] Components Mass percentage Butyl rubber 20~30 servings Medium molecular weight polyisobutylene 10~20 servings Silylated polyisobutylene 15~30 servings talcum powder 5-15 servings Sericite powder 15~30 servings Carbon Black 1~10 servings 3A molecular sieve 1~10 servings Antioxidant 1010 0.3~0.8 Antioxidant 168 0.3~0.8 .

[0152] The second object of the present invention is to provide a method for synthesizing the silylated polyisobutylene described in any one of the above items, comprising the following steps: heating the highly active polyisobutylene, adding a catalyst A and a silane coupling agent to obtain the silylated polyisobutylene;

[0153] Wherein, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II),

[0154]

[0155] The structural formula of the silane coupling agent is YR 1 -SiX 3 ;

[0156] X is a hydrolyzable group;

[0157] Y is a non-hydrolyzable group;

[0158] R 1 C 1 -C 12 Alkylene.

[0159] In certain embodiments, X is selected from C 1 -C 4 One of the alkoxy groups.

[0160] In certain embodiments, the X is selected from methoxy and ethoxy.

[0161] In certain embodiments, the R 1 C 1 -C 8 Alkylene.

[0162] In certain embodiments, the R 1 C 1 -C 6 Alkylene.

[0163] In certain embodiments, the Y is dimethylsilyl.

[0164] In certain embodiments, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300.

[0165] In certain embodiments, the high-reactivity polyisobutylene is HRPIB2300.

[0166] In certain embodiments, the synthesis is carried out in an organic solvent B, and the organic solvent B is one or more of acetone, isopropanol, and petroleum ether.

[0167] In certain embodiments, the synthesis is carried out in an organic solvent B, and the organic solvent B is isopropanol.

[0168] In certain embodiments, the temperature is raised to 40-70°C.

[0169] In certain embodiments, the temperature is raised to 50-60°C.

[0170] In certain embodiments, the catalyst A is an organometallic catalyst.

[0171] In certain embodiments, the catalyst A is a platinum catalyst.

[0172] In certain embodiments, the catalyst A is one or more of chloroplatinic acid and a complex of chloroplatinic acid.

[0173] The third object of the present invention is to provide a method for synthesizing the silylated polyisobutylene described in any one of the above items, comprising the following steps:

[0174] S1: heating highly active polyisobutylene to a first temperature under acidic conditions, adding peracetic acid, and heating to a second temperature to obtain a first reaction mixture;

[0175] S2: adding catalyst C to the first reaction mixture under hydrogen conditions, and heating the mixture to a third temperature to obtain a second reaction mixture;

[0176] S3: adding catalyst D and silane coupling agent to the second reaction mixture to obtain silylated polyisobutylene;

[0177] Wherein, in the step S1, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II),

[0178]

[0179] In step S3, the structural formula of the silane coupling agent is ZR 1 -SiX 3 ;

[0180] X is a hydrolyzable group;

[0181] Z is a non-hydrolyzable group;

[0182] R 1 C 1 -C 12 Alkylene.

[0183] In certain embodiments, X is selected from C 1 -C 4 One of the alkoxy groups.

[0184] In certain embodiments, the X is selected from methoxy and ethoxy.

[0185] In certain embodiments, the R 1 C 1 -C 8 Alkylene.

[0186] In certain embodiments, the R 1 C 1 -C 6 Alkylene.

[0187] In certain embodiments, Z is an isocyanate group.

[0188] In certain embodiments, the silane coupling agent is one or more of 3-isocyanatepropyltriethoxysilane and 3-isocyanatepropyltrimethoxysilane.

[0189] In certain embodiments, in step S1, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300.

[0190] In certain embodiments, in step S1, the highly reactive polyisobutylene is HRPIB2300.

[0191] In certain embodiments, the reaction of steps S1 and S2 is carried out in an organic solvent E, and the organic solvent E is one or more of acetone, isopropanol, and petroleum ether.

[0192] In certain embodiments, the reaction of steps S1 and S2 is carried out in an organic solvent E, and the organic solvent E is isopropanol.

[0193] In certain embodiments, in step S1, the first temperature is 40-70°C.

[0194] In certain embodiments, in step S1, the first temperature is 50-60°C.

[0195] In certain embodiments, in step S1, the second temperature is 60-90°C.

[0196] In certain embodiments, in step S1, the second temperature is 70-80°C.

[0197] In certain embodiments, in step S2, the flow rate of hydrogen is 10 to 30 mL / min.

[0198] In certain embodiments, in step S2, the flow rate of hydrogen is 20 mL / min.

[0199] In certain embodiments, in step S2, the third temperature is 160-190°C.

[0200] In certain embodiments, in step S2, the third temperature is 170-180°C.

[0201] In certain embodiments, in step S2, the catalyst C is an inorganic salt catalyst mixture.

[0202] In certain embodiments, in step S2, the catalyst C is an inorganic salt catalyst mixture containing Pt and / or Pd.

[0203] In certain embodiments, in step S2, the catalyst C is one or more of chloroplatinic acid, a complex of chloroplatinic acid, palladium acetate, and a complex of palladium acetate.

[0204] In certain embodiments, in step S3, the catalyst D is one of an organic metal catalyst, an amine catalyst, and a metal catalyst.

[0205] In certain embodiments, in step S3, the catalyst D is an organic metal catalyst.

[0206] In certain embodiments, in step S3, the catalyst D is a platinum catalyst.

[0207] In certain embodiments, in step S3, the catalyst D is one or more of chloroplatinic acid and a complex of chloroplatinic acid.

[0208] In certain embodiments, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is one or more of a polyphenol polymerization inhibitor, a quinone polymerization inhibitor, a thiol polymerization inhibitor, and an amine polymerization inhibitor.

[0209] In certain embodiments, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is a quinone polymerization inhibitor.

[0210] In certain embodiments, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is chloranil.

[0211] In certain embodiments, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is (0.1-1)‰ chloranil.

[0212] In certain embodiments, in step S3, a molecular sieve is further added, and the molecular sieve is 3A to 5A molecular sieve.

[0213] In certain embodiments, in step S3, a molecular sieve is further added, and the molecular sieve is a 5A molecular sieve.

[0214] A fourth object of the present invention is to provide a method for preparing the high water-resistance butyl sealant as described in any one of the above items, comprising the following steps:

[0215] (1) adding butyl rubber and medium molecular weight polyisobutylene into a kneader according to weight parts, heating, and kneading under the protection of inert gas, and then sequentially adding an antioxidant, an inorganic filler, and a reinforcing material into the kneader and continuing to knead;

[0216] (2) Then, the silanized polyisobutylene and the molecular sieve are added to the mixture obtained in step (1), the inert gas is turned off, and the mixture is evacuated for kneading, and the vacuum degree is controlled to be 0.08-0.1 MPa.

[0217] In certain embodiments, before step (1), the method further comprises: drying and dehydrating the inorganic filler, the reinforcing material and the molecular sieve.

[0218] In certain embodiments, the kneading temperature in step (1) is controlled to be 110-130°C (specifically preferably 111°C, 112°C, 113°C, 114°C, 115°C, 116°C, 117°C, 118°C, 119°C, 120°C, 121°C, 122°C, 123°C, 124°C, 125°C, 126°C, 127°C, 128°C, 129°C, 130°C, etc.), and the rotation speed is 20r / min.

[0219] In certain embodiments, the kneading time in step (1) is controlled to be 25 to 35 min, for example, 26 min, 27 min, 28 min, 29 min, 30 min, 31 min, 32 min, 33 min, 34 min, 35 min, etc.

[0220] In certain embodiments, the kneading time in step (1) is controlled to be 30 minutes.

[0221] In certain embodiments, the kneading temperature in step (2) is controlled to be 130-150°C (specifically preferably 131°C, 132°C, 133°C, 134°C, 135°C, 136°C, 137°C, 138°C, 139°C, 140°C, 141°C, 142°C, 143°C, 144°C, 145°C, 146°C, 147°C, 148°C, 149°C, 150°C, etc.), and the rotation speed is 30r / min.

[0222] In certain embodiments, the kneading time in step (2) is controlled to be 35 to 45 min, for example, 36 min, 37 min, 38 min, 39 min, 40 min, 41 min, 42 min, 43 min, 44 min, 45 min, etc.

[0223] In certain embodiments, the kneading time in step (2) is controlled to be 40 minutes.

[0224] The preparation method of the high water-resistance butyl sealant of the present invention comprises the following steps:

[0225] (1) The inorganic filler, reinforcing material and molecular sieve are dried and dehydrated under vacuum at 105°C for more than 60 minutes;

[0226] (2) adding butyl rubber and medium molecular weight polyisobutylene according to weight proportions into a clean kneader, raising the temperature of the kneader to 110-130° C., covering the kneader with a cover plate and introducing nitrogen to maintain a kneading speed of 20 r / min for kneading and mixing for 30 min, then adding an antioxidant, dried and dehydrated inorganic filler and reinforcing material into the kneader, maintaining the above temperature and speed and continuing kneading and mixing for 30 min;

[0227] (3) Then add the silanized polyisobutylene and the dried and dehydrated molecular sieve to the mixture obtained in step (2) according to the weight ratio. Close the nitrogen channel, evacuate and maintain the vacuum degree at 0.08-0.1 MPa, increase the temperature to 140°C, set the speed to 30 r / min and knead and mix for 40 minutes. Observe that the sealant in the kneader is mixed evenly without particles and agglomerates, and then discharge and package.

[0228] A fifth object of the present invention is to provide an application of a high-resistance water-resistant butyl sealant as described in any one of the above items or a product obtained according to the above preparation method in the field of photovoltaic modules.

[0229] The raw materials used in the examples of this application can all be purchased directly from the market.

[0230] The present invention is further described below in conjunction with specific examples and comparative examples. If no specific techniques or conditions are specified in the following examples, the conventional techniques or conditions described in the literature in the art, or the conditions recommended by the product instructions and the manufacturer are generally used. Unless otherwise specified, various starting materials, materials and reagents are commercially available or synthesized according to known methods.

[0231] Experimental Example 1 Preparation of Silylated Polyisobutylene F

[0232]

[0233] 100 g of highly active polyisobutylene having a content of more than 70 wt% of the compound represented by formula (II) was added to a reactor, and 120 mL of isopropanol solution was added, the temperature of the reactor was raised to 50-60° C., and 80 mL of peracetic acid was added. The speed of the stirring frame of the reactor was set to 20-30 r / min, and the highly active polyisobutylene and peracetic acid were fully mixed, and the temperature was raised to 70-80° C.

[0234] Hydrogen peroxide is slowly added dropwise to obtain epoxy-terminated polyisobutylene as shown in formula (III), which is fractionated and purified.

[0235]

[0236] The epoxy-terminated polyisobutylene obtained as shown in formula (III) is further added to the reactor and dissolved in 20 mL of isopropanol solution. 10 mL of chloroplatinic acid complex is added. The stirring frame of the reactor is set to rotate at 20 to 30 r / min, and the mixture is fully mixed. The temperature is raised to 170 to 180° C., and after excessive hydrogen is introduced into the reactor to exclude air, hydrogen is introduced at a flow rate of 20 mL / min. After a period of reaction, the hydrogen valve is closed to obtain the secondary hydroxyl-terminated polyisobutylene as shown in formula (IV), which is then purified.

[0237]

[0238] The secondary hydroxyl-terminated polyisobutylene obtained as shown in formula (IV) was added to a planetary mixer, and 5 mL of chloroplatinic acid, 200 ppm of tetrachlorobenzoquinone, and 5A molecular sieves were added. 150 mL of 3-isocyanatepropyltriethoxysilane was added, and the mixture was mixed evenly in vacuum and placed at room temperature for 24 hours to obtain silylated polyisobutylene F as shown in formula (V).

[0239]

[0240] Experimental Example 2 Preparation of Silylated Polyisobutylene G

[0241]

[0242] 100g of highly active polyisobutylene with a content of more than 70wt% of the compound represented by formula (II) is added to a reaction kettle, and 20mL of isopropanol solution is added, the temperature is raised to 50°C, and the mixture is stirred and mixed evenly. 10mL of chloroplatinic acid and 15mL of silane coupling agent are added, and the mixture is stirred evenly in vacuum. After standing at room temperature for 24h, silane-grafted polyisobutylene is obtained. The unreacted silane coupling agent and isopropanol solution are removed, and the mixture is purified to obtain silanized polyisobutylene G.

[0243] Example 1

[0244] The specific selection of each raw material is shown in the table below.

[0245] Components Mass fraction Butyl rubber 25 Medium molecular weight polyisobutylene 14 Silylated polyisobutylene F 20 talcum powder 10 Sericite powder 20 Carbon Black 5 3A molecular sieve 5 Antioxidant 1010 0.5 Antioxidant 168 0.5 total 100

[0246] Example 2

[0247] Except for the different raw material composition, it is basically the same as Example 1. For the specific selection of each raw material, please refer to the table below.

[0248] Components Mass fraction Butyl rubber 25 Medium molecular weight polyisobutylene 14 Silylated polyisobutylene G 20 talcum powder 10 Sericite powder 20 Carbon Black 5 3A molecular sieve 5 Antioxidant 1010 0.5 Antioxidant 168 0.5 total 100

[0249] Example 3

[0250] Except for the different raw material composition, it is basically the same as Example 1. For the specific selection of each raw material, please refer to the table below.

[0251] Components Mass fraction Butyl rubber 25 Medium molecular weight polyisobutylene 14 Silylated polyisobutylene F 10 Silylated polyisobutylene G 10 talcum powder 10 Sericite powder 20 Carbon Black 5 3A molecular sieve 5 Antioxidant 1010 0.5 Antioxidant 168 0.5 total 100

[0252] Comparative Example 1

[0253] Except for the different raw material composition, it is basically the same as Example 1. For the specific selection of each raw material, please refer to the table below.

[0254]

[0255]

[0256] Comparative Example 2: Commercially available butyl sealant - Foster PB401.

[0257] Performance Testing

[0258] 1. Ultraviolet radiation resistance test: In order to verify the ultraviolet radiation resistance of the sealant, the ultraviolet resistance test is carried out according to the ultraviolet pretreatment test method of IEC61345;

[0259] 2. Determination of glass-to-glass tensile shear strength: Test the tensile shear strength of sealant in accordance with the national standard GB / T 7124-2008 test method;

[0260] 3. Determination of water vapor transmission rate: Test the water vapor transmission rate of sealant according to the national standard GB / T 21529-2008 test method.

[0261] The test results are shown in the table below.

[0262]

[0263] The material of the present invention exhibits excellent anti-aging ability in the ultraviolet radiation resistance test, while the comparative examples show varying degrees of aging.

[0264] After aging treatment (85°C & 85% RH for 1 day and 30 days), the adhesion of Example 1, Example 2 and Example 3 not only did not decrease, but increased significantly, indicating that the material of the present invention has excellent adhesion improvement performance under high temperature and high humidity environment. The adhesion of Comparative Example 1 and Comparative Example 2 both decreased after aging, indicating that their adhesion weakened during the aging process and their performance was unstable. In summary, after high temperature and high humidity aging treatment, the adhesion of the embodiment was significantly improved, while the adhesion of the comparative example decreased, indicating that the adhesion of the material of the present invention was enhanced during the aging process, while the adhesion of the comparative example was weakened.

[0265] After aging treatment, the water vapor permeability of Example 1, Example 2 and Example 3 all remain at a low level or even decrease, indicating that the material of the present invention has good barrier properties in a high temperature and high humidity environment and stable performance. The water vapor permeability of Comparative Example 1 and Comparative Example 2 increased significantly after aging, indicating that their barrier properties decreased significantly during the aging process and could not meet the requirements of long-term stable use. In summary, the water vapor permeability of the examples remained at a low level or even decreased after aging, while the water vapor permeability of the comparative examples increased significantly, indicating that the material of the present invention has significant advantages in barrier properties.

[0266] It can be seen from the above table that the high water-resistant butyl sealant provided in the present invention uses silanized polyisobutylene to ensure low water vapor permeability, weather resistance and bonding strength, and can improve the post-curing strength after reacting with water, which can effectively meet the requirements for long-term water vapor barrier effect outdoors.

[0267] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present invention and do not limit the scope of protection of the patent of the present invention.

Claims

1. A high water-resistance butyl sealant, characterized in that: The high-resistance water-resistant butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, and inorganic filler; Wherein, the number average molecular weight of the medium molecular weight polyisobutylene is 100000 to 500000; The structure of the silylated polyisobutylene is shown in formula (I): Wherein, n is 10-100; X is a hydrolyzable group; R1 is C1-C 12 Alkylene; R' is -Si(CH3)2-, One of them.

2. The high water-resistance butyl sealant according to claim 1, characterized in that: The X is selected from one of C1-C4 alkoxy groups, preferably methoxy and ethoxy; Preferably, R1 is C1-C8 alkylene, preferably C1-C6 alkylene; Preferably, the butyl rubber is selected from raw rubber Mooney viscosity ML 1+8 46 to 56; Preferably, the number average molecular weight of the medium molecular weight polyisobutylene is 120,000 to 150,000; Preferably, the inorganic filler is one or more of talc, sericite powder, magnesium silicate, light calcium carbonate, and kaolin, preferably a combination of sericite powder and / or talc, more preferably a combination of sericite powder and talc; Preferably, the weight ratio of the sericite powder to the talc powder is 1:(0.1-2), preferably 1:(0.1-1), and more preferably 1:0.5; Preferably, the components of the high-resistance water-resistant butyl sealant further include a reinforcing material, and the reinforcing material is one or more of carbon black, fumed silica, and nano-calcium carbonate, preferably carbon black; Preferably, the components of the high-resistance water-resistant butyl sealant further include molecular sieves, and the molecular sieves are 3A to 5A molecular sieves, preferably 3A molecular sieves; Preferably, the components of the high-resistance water-resistant butyl sealant also include an antioxidant, and the antioxidant is one or more of a phosphite antioxidant and a hindered phenol antioxidant, preferably antioxidant 1010 and / or antioxidant 168.

3. The high water-resistance butyl sealant according to claim 2, characterized in that: In terms of mass percentage, the content of the silylated polyisobutylene is 10 to 40 parts, preferably 15 to 30 parts; And / or, the content of the butyl rubber is 10 to 40 parts, preferably 20 to 30 parts; and / or, the content of the medium molecular weight polyisobutylene is 5 to 30 parts, preferably 10 to 20 parts; And / or, the content of the inorganic filler is 30 to 60 parts, preferably 30 to 40 parts; and / or, the content of the reinforcing material is 1 to 15 parts, preferably 1 to 10 parts; And / or, the content of the molecular sieve is 1 to 15 parts, preferably 1 to 10 parts; And / or, the content of the antioxidant is 0.2 to 2 parts, preferably 0.6 to 1.6 parts.

4. The high water-resistance butyl sealant according to any one of claims 2 to 3, characterized in that: The moisture-curing high-water-resistance butyl sealant comprises the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc powder, carbon black, 3A molecular sieve, and antioxidant; Wherein, the antioxidant is selected from antioxidant 1010 and / or antioxidant 168; Preferably, the high-resistance water-resistant butyl sealant is composed of the following components: butyl rubber, medium molecular weight polyisobutylene, silanized polyisobutylene, sericite powder, talc, carbon black, 3A molecular sieve, and antioxidant; Preferably, in terms of mass percentage, the components of the high-resistance water-resistant butyl sealant include: ； Preferably, in terms of mass percentage, the components of the high-resistance water-resistant butyl sealant include: 。 5. A method for synthesizing silylated polyisobutylene according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: heating high-activity polyisobutylene, adding catalyst A and silane coupling agent to obtain silylated polyisobutylene; Wherein, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II), The structural formula of the silane coupling agent is Y-R1-SiX3; X is a hydrolyzable group; Y is a non-hydrolyzable group; R1 is C1-C 12 Alkylene.

6. The method for synthesizing silylated polyisobutylene according to claim 5, characterized in that: The X is selected from one of C1-C4 alkoxy groups, preferably methoxy and ethoxy; Preferably, R1 is C1-C8 alkylene; preferably C1-C6 alkylene; Preferably, Y is dimethylsilyl; Preferably, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300, preferably HRPIB2300; Preferably, the synthesis is carried out in an organic solvent B, which is one or more of acetone, isopropanol, and petroleum ether, preferably isopropanol; Preferably, the temperature is raised to 40-70°C, preferably 50-60°C; Preferably, the catalyst A is an organic metal catalyst, preferably a platinum catalyst, more preferably one or more of chloroplatinic acid and a complex of chloroplatinic acid.

7. A method for synthesizing silylated polyisobutylene according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: heating highly active polyisobutylene to a first temperature under acidic conditions, adding peracetic acid, and heating to a second temperature to obtain a first reaction mixture; S2: adding catalyst C to the first reaction mixture under hydrogen conditions, and heating the mixture to a third temperature to obtain a second reaction mixture; S3: adding catalyst D and silane coupling agent to the second reaction mixture to obtain silylated polyisobutylene; Wherein, in the step S1, the highly active polyisobutylene is a polyisobutylene having a compound content of greater than 70 wt % as shown in formula (II), In the step S3, the structural formula of the silane coupling agent is Z-R1-SiX3; X is a hydrolyzable group; Z is a non-hydrolyzable group; R1 is C1-C 12 Alkylene.

8. The method for synthesizing silylated polyisobutylene according to claim 7, characterized in that: The X is selected from one of C1-C4 alkoxy groups, preferably methoxy and ethoxy; Preferably, R1 is C1-C8 alkylene, preferably C1-C6 alkylene; Preferably, Z is an isocyanate group; Preferably, the silane coupling agent is one of 3-isocyanatepropyltriethoxysilane and 3-isocyanatepropyltrimethoxysilane; Preferably, in step S1, the highly active polyisobutylene is one or more of HRPIB1000, HRPIB1300, and HRPIB2300, preferably HRPIB2300; Preferably, the reaction of steps S1 and S2 is carried out in an organic solvent E, and the organic solvent E is one or more of acetone, isopropanol, and petroleum ether, preferably isopropanol; Preferably, in step S1, the first temperature is 40-70°C, preferably 50-60°C; Preferably, in step S1, the second temperature is 60 to 90° C., preferably 70 to 80° C.; Preferably, in step S2, the flow rate of hydrogen is 10 to 30 mL / min, preferably 20 mL / min; Preferably, in step S2, the third temperature is 160-190° C., preferably 170-180° C.; Preferably, in step S2, the catalyst C is an inorganic salt catalyst, preferably an inorganic salt catalyst containing Pt and / or Pd, more preferably one or more of chloroplatinic acid, a complex of chloroplatinic acid, palladium acetate, and a complex of palladium acetate; Preferably, in step S3, the catalyst D is one of an organic metal catalyst, an amine catalyst, and a metal catalyst, preferably an organic metal catalyst, more preferably a platinum catalyst, and further preferably one or more of chloroplatinic acid and a complex of chloroplatinic acid; Preferably, in step S3, a polymerization inhibitor is further added, and the polymerization inhibitor is one or more of a polyphenol polymerization inhibitor, a quinone polymerization inhibitor, a thiol polymerization inhibitor, and an amine polymerization inhibitor, preferably a quinone polymerization inhibitor, and more preferably tetrachlorobenzoquinone; Preferably, in step S3, a molecular sieve is also added, and the molecular sieve is 3A to 5A molecular sieve, preferably 5A molecular sieve.

9. A method for preparing a high water-resistance butyl sealant as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: (1) adding butyl rubber and medium molecular weight polyisobutylene into a kneader according to weight parts, heating, and kneading under the protection of inert gas, and then sequentially adding an antioxidant, an inorganic filler, and a reinforcing material into the kneader and continuing to knead; (2) then adding the silanized polyisobutylene and the molecular sieve to the mixture obtained in step (1), closing the inert gas and evacuating the mixture for kneading, and controlling the vacuum degree to be 0.08-0.1 MPa; Preferably, before step (1), the method further comprises: drying and dehydrating the inorganic filler, the reinforcing material and the molecular sieve; Preferably, the kneading temperature in step (1) is controlled to be 110-130°C and the rotation speed is 20r / min; Preferably, the kneading time in step (1) is controlled to be 25 to 35 minutes, preferably 30 minutes; Preferably, the kneading temperature in step (2) is controlled to be 130-150° C. and the rotation speed is 30 r / min; Preferably, the kneading time in step (2) is controlled to be 35 to 45 minutes, preferably 40 minutes.

10. Use of the high-resistance water-resistant butyl sealant according to any one of claims 1 to 4 or the product obtained by the preparation method according to claim 9 in the field of photovoltaic modules.

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