High-water-resistance sealing adhesive tape

Abstract

The invention belongs to the technical field of high polymer materials, and provides a high-water-resistance sealing adhesive tape which comprises the following components in parts by mass: 30-50 parts of a modified polymer, 5-15 parts of petroleum resin, 30-50 parts of an inorganic filler, 0.5-1 part of an antioxidant, 0.5-1 part of an ultraviolet absorbent and 0.5-1 part of a vulcanizing agent. The modified polymer comprises butyl rubber and polyisobutene in a mass part ratio of (1: 3.6)-(3.6: 1). The butyl rubber and the polyisobutene with different molecular weights are matched, so that the problem of high moisture transmittance is solved, and the effect of high moisture resistance is achieved. In addition, by adopting the scheme of adding vulcanization, the problems of long-term assembly load failure and water blocking performance reduction caused by insufficient cohesion strength and low compression strength are solved. The sealing adhesive tape is a novel sealant for sealing a solar module frame, mainly has the functions of water resistance, reliable cohesion and reliable bonding performance, and the photovoltaic module frame is good in flexibility, convenient to fit and good in weather resistance when being bonded, and can be used outdoors for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-water-resistance sealing tape. Background Art

[0002] New solar panels contain delicate and environmentally sensitive materials such as silicon wafers and electrodes. For example, if silicon wafers are exposed to a humid environment for a long time, moisture may penetrate into them, causing corrosion or short circuits on the surface of the silicon wafers, affecting their photoelectric conversion efficiency. Sealing can prevent foreign substances such as dust and moisture from contacting these internal components, extending the service life of the components.

[0003] The main problem of existing solar panels is that the sealing materials have poor aging resistance. Due to long-term exposure to outdoor environments, UV rays, high and low temperatures and other climate factors, the performance of butyl sealing materials may gradually decline. Over time, sealing failure occurs, which is difficult to repair and very expensive. Therefore, the aging resistance of sealing materials is particularly important.

[0004] Patent CN202410146523 fails to provide a specific sealant solution, but uses structural design to solve the problem of photovoltaic module failure caused by water and oxygen intrusion due to poor sealing in traditional processes.

[0005] Patent CN202410244500 provides a silicone sealant solution, but fails to mention the specific water-blocking ability and water vapor permeability, which is insufficient to prove the quality of the water-blocking ability.

[0006] Patent CN106928883A only provides a sealant solution that can form good adhesion with the glass surface under low temperature environment, fails to mention the specific water vapor permeability, and fails to prove the quality of its water barrier ability.

[0007] Patent CN106589434B provides a solution for edge-sealing tape that forms uniform through holes on the tape by volatilization of high-temperature water vapor, thereby achieving a breathable function.

[0008] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0009] The present invention is made to solve the above-mentioned problem, and its purpose is to provide a high water-resistance sealing tape.

[0010] The present invention provides a high water-resistance sealing tape, which has the following characteristics and comprises the following components in terms of mass fraction:

[0011] Modified polymer: 30-50 parts;

[0012] Petroleum resin: 5-15 parts;

[0013] Inorganic filler: 30-50 parts;

[0014] Antioxidant: 0.5-1 part;

[0015] UV absorber: 0.5-1 part;

[0016] Vulcanizing agent: 0.5-1 part;

[0017] The modified polymer includes butyl rubber and polyisobutylene in a mass ratio of 1:3.6 to 3.6:1.

[0018] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: the molecular weight of the butyl rubber is 560,000, and the molecular weight of the polyisobutylene is 2480.

[0019] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: wherein the modified polymer further comprises any one or more of chloroprene rubber, styrene block copolymer, polyolefin block copolymer, nitrile rubber or EPDM rubber.

[0020] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: the butyl rubber is any one of Yanshan Petrochemical 1751, Russian 1675N or JSR 268; and the polyisobutylene is Korean Daelim PB2400.

[0021] The high-resistance water-sealing tape provided by the present invention may also have the following characteristics: the petroleum resin is any one of aliphatic resin, alicyclic resin, aromatic resin, aliphatic / aromatic copolymer resin or hydrogenated petroleum resin; the inorganic filler is any one or more of white carbon black, silica, mica powder, light calcium carbonate, titanium dioxide, carbon black or hollow glass beads; the antioxidant is any one or more of aromatic amine antioxidants, hindered phenol antioxidants or auxiliary antioxidants; the ultraviolet absorber is any one or a mixture of at least two of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles or triazines and hindered amine compounds.

[0022] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: the petroleum resin is Luhua C5 petroleum resin A-1100; the inorganic filler is light calcium carbonate, such as Shitong PCC306, Changzhou calcium carbonate 503, etc.; the antioxidant is BASF Irganox1010; and the ultraviolet absorber is BASF Tinuvin326.

[0023] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: wherein the vulcanizing agent is phenolic resin and zinc oxide.

[0024] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: wherein the zinc oxide is obtained by indirect method.

[0025] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: wherein the high water-resistance sealing tape further comprises 1-5 parts of a colorant by mass ratio.

[0026] The high water-resistance sealing tape provided by the present invention may also have the following characteristics: wherein the colorant is carbon black, preferably Henan Xinjin Carbon Black 112.

[0027] Functions and Effects of the Invention

[0028] The present invention uses a combination of butyl rubber and polyisobutylene of different molecular weights to solve the problem of high moisture permeability and obtain a high water vapor resistance effect. In addition, the solution of adding vulcanization solves the problem of insufficient cohesive strength and low compressive strength, which leads to long-term component load failure and decreased water barrier performance. The high water-resistant sealing tape provided by the present invention is a new type of sealant for sealing the frame of solar panels. The sealant is mainly water-resistant, provides reliable cohesive force, and reliable bonding performance. It has good softness when bonding the photovoltaic panel frame, is easy to fit, has good weather resistance, and can be used outdoors for a long time. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, a high water-resistance sealing tape of the present invention is specifically described below in conjunction with an embodiment.

[0030] Unless otherwise specified, the raw materials used in the present invention are purchased through general commercial channels. All test standards not mentioned are national standards.

[0031] The materials used in the preparation examples, embodiments and comparative examples of the present invention are as follows:

[0032] Butyl rubber, Yanshan Petrochemical 1751;

[0033] Polyisobutylene, Daelim PB2400, South Korea;

[0034] Petroleum resin, Luhua C5 petroleum resin A-1100;

[0035] Inorganic filler, Changzhou calcium carbonate 503;

[0036] Antioxidant, BASF Irganox1010;

[0037] UV absorber, BASF Tinuvin 326;

[0038] Curing agent, phenolic resin SIGROUP FRJ-551, zinc oxide Shanghai Oucheng (content more than 99.7%);

[0039] Colorant, Henan Xinjin Carbon Black 112.

[0040] <Examples 1-3 and Comparative Examples 1-3>

[0041] Rubber production process: First, stir butyl rubber, polyisobutylene, antioxidant and 60% calcium carbonate in an internal mixer for 10-20 minutes. After stirring until there are no particles, add them to a 300L kneader and other remaining materials in a certain order of addition. Control the temperature between 130-140℃ and the time for 40-60 minutes. After stirring until uniform and particle-free, the material can be discharged.

[0042] The rubber compound is produced according to the above rubber compound production process and the following Table 1, and the performance test is shown in Table 2. In Table 2, the test method for the failure time of the cobalt chloride test paper of the vacuum laminated sample DH test is:

[0043] Prepare enough cobalt chloride test papers to ensure that they are of reliable quality and have not been contaminated or damp. When preparing vacuum laminated samples, first place the cobalt chloride test paper in the middle of the laminated sample glass plate, stick sealing tape on the four sides and then cover with another glass plate, then vacuum laminate the entire sample, and then put the sample into a constant temperature and humidity chamber with a temperature of 85°C and a relative humidity of 85%. Observe the color change of the cobalt chloride test paper in the vacuum laminated sample every 24 hours and register and evaluate it at levels 1-15, until the sample is evaluated as failed when the color change level is 15, end the test, and record the failure time.

[0044] The test method for the failure time of cobalt chloride test paper in the PCT test of vacuum laminated samples is:

[0045] Prepare enough cobalt chloride test papers to ensure that they are of reliable quality and have not been contaminated or damp. When preparing vacuum laminated samples, first place the cobalt chloride test paper in the middle of the laminated sample glass plate, stick sealing tape on the four sides and then cover with another glass plate, then vacuum laminate the entire sample, and then place the sample in a high-pressure accelerated aging test (PCT) test chamber. Observe the color change of the cobalt chloride test paper in the vacuum laminated sample every 24 hours and register and evaluate it at levels 1-15, until the sample is evaluated as failed when the color change level is 15, end the test, and record the failure time.

[0046] Table 1 Composition list

[0047]

[0048] Table 2 Performance results

[0049]

[0050] From the test results in Table 2, we can see that:

[0051] ① The water vapor permeability of Example 2 is lower than that of Examples 1 and 3, and the time for the cobalt chloride test paper in the DH and PCT tests to fail after vacuum lamination in Example 2 is also longer than that in Examples 1 and 3;

[0052] ② From the comparison of the test results of Examples 1, 2, 3 and Comparative Examples 1 and 2, it can be found that the water vapor permeability of the formula without butyl rubber and polyisobutylene (i.e., Comparative Examples 1 and 2) is about 3-9 times that of Example 2, the time for the DH test cobalt chloride test paper to fail after vacuum lamination is about 1 / 4-1 / 3 of that of Example 2, and the time for the PCT test cobalt chloride test paper to fail after vacuum lamination is about 3 / 7-13 / 24 of that of Example 2;

[0053] ③ From the comparison of the test results of Examples 1, 2, 3 and Comparative Example 3, it can be found that the water vapor permeability of the formulation of the vulcanization scheme without using phenolic resin and zinc oxide (Comparative Example 3) is about twice that of Example 2, the time for the DH test cobalt chloride test paper to fail after vacuum lamination is about 1 / 2 of that of the Example, and the time for the PCT test cobalt chloride test paper to fail after vacuum lamination is 5 / 7 of that of Example 2.

[0054] The above data can prove that the combination of butyl rubber and polyisobutylene and the vulcanization scheme of phenolic resin and zinc oxide have a great influence on improving the water vapor transmission rate of the product and the failure time of the cobalt chloride test paper in the DH and PCT tests after vacuum lamination, and the influence of the combination of butyl rubber and polyisobutylene is greater than that of the vulcanization scheme of phenolic resin and zinc oxide.

[0055] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A high water-resistance sealing tape, characterized in that: The components include the following by mass ratio: Modified polymer: 30-50 parts; Petroleum resin: 5-15 parts; Inorganic filler: 30-50 parts; Antioxidant: 0.5-1 part; UV absorber: 0.5-1 part; Vulcanizing agent: 0.5-1 part; The modified polymer comprises butyl rubber and polyisobutylene in a mass ratio of 1:3.6 to 3.6:

1.

2. The high water-resistance sealing tape according to claim 1, characterized in that: in, The molecular weight of the butyl rubber is 560,000. The molecular weight of the polyisobutylene is 2480.

3. The high water-resistance sealing tape according to claim 1, characterized in that: in, The modified polymer also includes any one or more of chloroprene rubber, styrene block copolymer, polyolefin block copolymer, nitrile rubber or ethylene propylene diene monomer rubber.

4. The high water-resistance sealing tape according to claim 3, characterized in that: in, The butyl rubber is any one of Yanshan Petrochemical 1751, Russian 1675N or JSR 268; The polyisobutylene is Daelim PB2400 from South Korea.

5. The high water-resistance sealing tape according to claim 1, characterized in that: in, The petroleum resin is any one of aliphatic resin, alicyclic resin, aromatic resin, aliphatic / aromatic copolymer resin or hydrogenated petroleum resin; The inorganic filler is any one or more of white carbon black, silicon dioxide, mica powder, light calcium carbonate, titanium dioxide, carbon black or hollow glass beads; The antioxidant is selected from any one or more of aromatic amine antioxidants, hindered phenol antioxidants or auxiliary antioxidants; The ultraviolet absorber is selected from any one of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles or triazines and hindered amines, or a mixture of at least two of them.

6. The high water-resistance sealing tape according to claim 5, characterized in that: in, The petroleum resin is Luhua C5 petroleum resin A-1100; The inorganic filler is light calcium carbonate, The antioxidant is BASF Irganox1010; The UV absorber is BASF Tinuvin 326.

7. The high water-resistance sealing tape according to claim 1, characterized in that: in, The vulcanizing agent is phenolic resin and zinc oxide.

8. The high water-resistance sealing tape according to claim 7, characterized in that: in, The zinc oxide is an indirect zinc oxide process.

9. The high water-resistance sealing tape according to claim 1, characterized in that: in, The high water-resistance sealing tape further comprises 1-5 parts of a colorant by mass ratio.

10. The high water-resistance sealing tape according to claim 9, characterized in that: in, The colorant is carbon black.

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