A room temperature self-vulcanizing flexible rubber flashing tape, preparation method and application thereof

Abstract

The application belongs to the field of waterproof materials, and discloses a room-temperature self-vulcanizing flexible rubber water-proof sealing tape, a preparation method and application. The water-proof sealing tape comprises a self-vulcanizing EPDM reinforcing layer, a metal mesh sandwich layer and a non-vulcanized butyl adhesive layer arranged in sequence. The raw materials of the self-vulcanizing EPDM reinforcing layer comprise the following components: ethylene-propylene-diene rubber, polyolefin elastomer, butyl rubber, first filler, first processing aid, first plasticizer, first tackifying resin, vulcanizing agent, ultraviolet absorber and anti-scorching agent, and optional accelerator. The water-proof sealing tape is an exposed type room-temperature plastic type, high-adhesion flexible rubber water-proof sealing tape that can be self-vulcanized at room temperature, and solves the problems of poor adhesion and poor aging resistance of existing products in the adhesion of building irregular parts.

Description

Technical Field

[0001] The present invention belongs to the field of waterproof materials, and more specifically, relates to a room temperature self-vulcanizing flexible rubber flooding sealing belt, a preparation method and an application thereof. Background Art

[0002] With the advancement of building materials and construction technology, people are placing higher demands on the quality of housing and the waterproofing and leak-proofing of construction projects. For roofing and underground waterproofing, there are currently mature asphalt-modified and polymer-based waterproof membranes, which, when combined with polyurethane and asphalt-based waterproof coatings, can achieve excellent waterproofing results. For large waterproofing surfaces, membranes and coatings offer the advantage of being easy to lay or roll.

[0003] However, when it comes to the treatment / repair of complex three-dimensional nodes and irregular shapes such as structural corners, downspouts, wall-penetrating pipes, T-joints, metal plates, cable edges, etc., there are problems such as the waterproofing material not fitting well enough to the construction surface or construction difficulties. Traditional sealants currently used for waterproofing in the market have the disadvantages of poor aging resistance and easy cracking after long-term exposure. Although SBS modified asphalt sealants have certain weather resistance and sealing properties, they will continuously release VOC gases and other harmful substances during use, polluting the environment. They also have poor high and low temperature resistance, and their ductility, tracking properties, and aging resistance are poor.

[0004] Rubber materials have become an important component of waterproofing materials for engineering structures due to their good flexibility and elasticity. Flexible rubber flashing strips have a certain degree of ductility. They can not only achieve waterproofing through the density of the rubber itself, but can also adapt to the elastic deformation of the structure or base layer to a certain extent without being damaged. They can achieve waterproofing functions under unfavorable conditions of rigid materials. Non-vulcanized butyl tape is used for sealing and waterproofing of joints. Butyl tape has excellent ductility and adaptability, but poor mechanical properties. In addition, due to the poor aging resistance of unvulcanized cross-linking, the long-term thermal expansion and contraction of the junction of different materials at the building joints can easily lead to the failure of the local butyl sealing waterproof layer, and then frequent leakage. Therefore, this places higher requirements on the weather resistance of the tape.

[0005] The existing non-vulcanized EPDM has strong plasticity and is easy to adapt, but has poor mechanical properties. Traditional vulcanized EPDM rubber uses sulfur or peroxide at a high temperature of 160°C to achieve cross-linking of the rubber molecular chains and improvement of mechanical properties, but the vulcanized rubber is a thermosetting material and cannot be molded.

[0006] Therefore, in order to achieve sealing and waterproofing of complex and irregular parts, it is urgent to develop a waterproof material that is highly ductile, easy to shape, adaptable, has certain mechanical strength, and excellent weather resistance at room temperature, so that it can be used for sealing and waterproofing of parts such as chimneys, ventilation pipes, walls, downspouts, window and door openings. Summary of the Invention

[0007] The present invention addresses the shortcomings of existing technologies by providing a room-temperature, self-vulcanizing, flexible rubber flashing sealing tape, its preparation method, and its application. This tape is an exposed, room-temperature, moldable, highly conformable, self-vulcanizing rubber flashing sealing tape. It addresses the problems of existing products, such as poor conformability and aging resistance, on irregularly shaped building surfaces.

[0008] In order to achieve the above-mentioned object, the first aspect of the present invention provides a room temperature self-vulcanized flexible rubber flooding sealing tape, which comprises a self-vulcanized EPDM reinforcement layer, a metal mesh sandwich layer and a non-vulcanized butyl adhesive layer arranged in sequence;

[0009] The raw materials of the self-vulcanizing EPDM reinforcement layer include the following components: ethylene propylene diene monomer rubber, polyolefin elastomer, butyl rubber, a first filler, a first processing aid, a first plasticizer, a first tackifying resin, a vulcanizing agent, an ultraviolet absorber and a scorch retarder, and an optional accelerator.

[0010] The technical principle of the present invention: The present invention formulates and designs the structure of EPDM (ethylene propylene diene monomer rubber), selects specific room temperature reactive vulcanizers and accelerators, so that EPDM can gradually absorb heat and undergo self-vulcanization and cross-linking over time at room temperature without high temperature heating; and introduces a special anti-scorching agent to prevent the raw materials of the self-vulcanized EPDM reinforcement layer from prematurely vulcanizing and scorching during the mixing process, thereby losing its molding ability. The room temperature self-vulcanizing flexible rubber flooding sealing tape of the present invention is composed of a three-layer composite of a self-vulcanizing EPDM reinforcement layer, a metal mesh sandwich layer, and a non-vulcanized butyl adhesive layer. When used, it is a non-vulcanized, plastic, highly adaptable, and easy-to-shape flooding tape. After construction, it gradually absorbs heat and undergoes a self-cross-linking reaction over time in the environment, thereby achieving a fixed seal.

[0011] In the present invention, the non-vulcanized butyl adhesive layer provides a bonding and sealing function. The self-vulcanized EPDM reinforcement layer is initially a plastic non-vulcanized rubber. Over time, it gradually absorbs heat and, under the action of the vulcanizer, undergoes vulcanization and crosslinking of the rubber molecular chains, effectively improving mechanical properties such as tensile strength, elongation at break, and hardness. The self-vulcanized EPDM reinforcement layer, metal mesh sandwich layer, and non-vulcanized butyl adhesive layer form a tightly bonded bond. During long-term use, the self-vulcanized EPDM cross-links and rebounds, resulting in a multi-layered, integrated composite tape consisting of the self-vulcanized EPDM reinforcement layer, metal mesh sandwich layer, and non-vulcanized butyl adhesive layer, effectively ensuring a sealed and waterproof effect.

[0012] According to the present invention, preferably, the raw materials of the non-vulcanized butyl adhesive layer include the following components: butyl rubber, polyisobutylene, a second filler, a second processing aid, a second plasticizer, a second tackifying resin, an antioxidant and a light stabilizer.

[0013] In the present invention, the filler added to the non-sulfurized butyl adhesive layer can not only effectively reduce the production cost, but also help the various components of the adhesive layer to be more evenly dispersed during the processing and mixing process; the low molecular weight polyisobutylene and the second plasticizer are added to soften the adhesive layer material, while increasing the bonding cohesion between the adhesive layer material and the filler, and improving the elongation, plasticity and flexibility of the adhesive layer material; the second tackifying resin is added to improve the initial adhesion and lasting adhesion effect of the butyl rubber, which helps to seal and bond with base materials such as concrete and metal tile roofing, and improve the peel strength. If the amount of the second tackifying resin is too small, the initial adhesion and lasting adhesion effect of the adhesive layer material will be reduced. If the amount of the second tackifying resin is too large, the cohesion and temperature resistance of the adhesive layer material will be reduced.

[0014] According to the present invention, preferably,

[0015] The raw materials of the self-vulcanized EPDM reinforcement layer include the following components in parts by weight: 95-105 parts of ethylene propylene diene monomer rubber, 10-50 parts of polyolefin elastomer, 20-60 parts of butyl rubber, 50-150 parts of a first filler, 1-10 parts of a first processing aid, 10-60 parts of a first plasticizer, 5-20 parts of a first tackifying resin, 3-10 parts of a vulcanizing agent, 1-2 parts of an ultraviolet absorber, 0.1-2 parts of a scorch retarder, and 0-5 parts of an accelerator; preferably The raw materials of the self-vulcanizing EPDM reinforcing layer include the following components in parts by weight: 95-105 parts of ethylene propylene diene monomer rubber, 10-50 parts of polyolefin elastomer, 20-60 parts of butyl rubber, 50-150 parts of a first filler, 1-10 parts of a first processing aid, 10-60 parts of a first plasticizer, 5-20 parts of a first tackifying resin, 3-10 parts of a vulcanizing agent, 1-2 parts of an ultraviolet absorber, 0.5-2 parts of a scorch retarder, and 1.5-3 parts of an accelerator;

[0016] The raw materials of the non-vulcanized butyl adhesive layer include the following components in parts by weight: 95-105 parts of butyl rubber, 50-150 parts of polyisobutylene, 100-200 parts of a second filler, 1-10 parts of a second processing aid, 10-30 parts of a second plasticizer, 50-200 parts of a second tackifying resin, 1-3 parts of an antioxidant, and 1-2 parts of a light stabilizer.

[0017] The flooding seal tape of the present invention uses EPDM rubber as the main material for the reinforcement layer. EPDM is a copolymer of ethylene, propylene, and a small amount of non-conjugated dienes. Its main chain consists of chemically stable saturated hydrocarbons, with unsaturated double bonds only in the side chains. Therefore, it exhibits excellent resistance to ozone, heat, weathering, and aging. Furthermore, because EPDM's molecular structure lacks polar substituents and has low intramolecular cohesive energy, the molecular chain maintains flexibility over a wide range, exhibits good low-temperature flexibility, and exhibits excellent high- and low-temperature resistance. Therefore, the room-temperature self-vulcanizing flexible rubber flooding seal tape of the present invention not only exhibits excellent waterproofness and insulation properties, but also exhibits excellent weather resistance, adhesion, aging resistance, and high- and low-temperature resistance.

[0018] The present invention adds butyl rubber to the self-vulcanized EPDM reinforcement layer, which can improve the compatibility of EPDM and the non-vulcanized butyl adhesive layer, thereby improving the bonding strength between the self-vulcanized EPDM reinforcement layer and the non-vulcanized butyl adhesive layer.

[0019] According to the present invention, preferably, the first filler and the second filler are each independently selected from at least one of carbon black, calcium carbonate, clay and talc.

[0020] According to the present invention, preferably, the first processing aid and the second processing aid are each independently selected from at least one of zinc oxide, stearic acid and zinc stearate.

[0021] According to the present invention, preferably, the first plasticizer and the second plasticizer are each independently selected from naphthenic oil and / or aromatic oil, preferably paraffin oil.

[0022] According to the present invention, preferably, the first tackifying resin and the second tackifying resin are each independently selected from at least one of a C5 petroleum resin, a C9 petroleum resin, and a terpene resin. The EPDM rubber in the self-vulcanizing EPDM reinforcing layer of the present invention lacks reactive groups in its molecular structure, resulting in low cohesive energy and poor self-adhesion and mutual adhesion. The addition of a tackifying resin can improve its cohesion and bonding compatibility with the unvulcanized butyl adhesive layer.

[0023] The present invention adds polyolefin elastomer to the self-vulcanizing EPDM reinforcing layer, which can increase the thermoplastic properties of the self-vulcanizing EPDM reinforcing layer material, which is beneficial for later processing; the narrow molecular weight distribution of the polyolefin elastomer makes it compatible with the filler and has better fluidity, which helps to improve the dispersion effect of the filler; at the same time, the polyolefin elastomer (POE) has excellent high and low temperature resistance, aging resistance, and ozone resistance, which greatly improves the tensile strength, elongation at break, and cohesive strength of the material under exposure, and can effectively broaden the operating temperature range of the room temperature self-vulcanizing flexible rubber flooding sealing tape. According to the present invention, preferably, the Mooney viscosity (test conditions: ML (1+4) 120°C) of the polyolefin elastomer is not greater than 40, and the Vicat softening point is not higher than 50°C, which helps to give the EPDM reinforcing layer good flexibility.

[0024] According to the present invention, preferably, the vulcanizing agent is selected from at least one of N,N,N,N-tetrachlorooxybisbenzenesulfonamide, N,N,N,N-tetrabromooxybisbenzenesulfonamide, N-halogenated caprolactam and N-bromoimide.

[0025] According to the present invention, preferably, the ultraviolet absorber is UV528 and / or UV531.

[0026] According to the present invention, preferably, the scorch retarder is selected from at least one of CTP, p-tert-butylphenol and N-cyclohexyl-2-benzothiazole sulfenamide.

[0027] According to the present invention, the accelerator is preferably selected from at least one of cobalt rosinate, cobalt naphthenate, p-benzoquinone dioxime, N,N-diphenylbismaleimide, and vinyl methacrylate. In the present invention, the vulcanizing agent and accelerator act synergistically to gradually vulcanize and crosslink the self-vulcanizing EPDM reinforcement layer material at room temperature, eliminating the need for high-temperature vulcanization.

[0028] According to the present invention, preferably, the polyisobutylene is selected from low molecular weight polyisobutylene with a molecular weight of 1300-2400.

[0029] According to the present invention, preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant B225.

[0030] According to the present invention, preferably, the light stabilizer is at least one of BASF Chimassorb 2020FDL, Chimassorb 944 and Chimassorb 81.

[0031] According to the present invention, the metal mesh core layer is preferably an aluminum mesh. Preferably, the aluminum mesh has a thickness of 0.1-0.2 mm and a mesh size of (1-2) mm x (2-5) mm. In the present invention, the metal mesh core layer serves as a sizing and reinforcement layer, enhancing the mechanical properties of the flashing seal tape of the present invention while effectively ensuring extremely low dimensional change.

[0032] The second aspect of the present invention provides a method for preparing the room temperature self-vulcanized flexible rubber flooding sealing tape, the method comprising the following steps:

[0033] S1: Preparation of self-vulcanized EPDM reinforcement material

[0034] The EPDM rubber, polyolefin elastomer, butyl rubber, first filler, first processing aid, first plasticizer, first tackifying resin, vulcanizing agent, ultraviolet absorber and scorch retarder are mixed and subjected to a first banburying process, and the temperature is lowered; optionally, the cooled product is mixed with an accelerator and subjected to a second banburying process to obtain the self-vulcanized EPDM reinforcement layer material;

[0035] S2: Preparation of non-sulfurized butyl adhesive layer material

[0036] The butyl rubber, polyisobutylene, the second filler, the second processing aid, the second plasticizer, the second tackifying resin, the antioxidant and the light stabilizer are mixed and subjected to a third banburying treatment to obtain the non-vulcanized butyl adhesive layer material;

[0037] S3: The self-vulcanized EPDM reinforcement layer material and the non-vulcanized butyl adhesive layer material are extruded, calendered, and laminated on both sides of the shaped reinforced metal mesh sandwich layer to obtain the room temperature self-vulcanized flexible rubber flooding sealing belt.

[0038] In the present invention, in step S1, the accelerator is not added during the first mixing treatment, because it is to avoid direct and large-scale contact between the vulcanizing agent and the accelerator to cause scorch.

[0039] In the present invention, the self-vulcanized EPDM reinforcement layer material obtained in step S1 and the room temperature self-vulcanized flexible rubber flooding sealing tape obtained in step S3 both need to be stored at low temperature away from light when not in use.

[0040] According to the present invention, preferably, the temperature of the first banburying treatment is 110-130° C., and the time is 15-30 min.

[0041] According to the present invention, preferably, the cooling is to cool the product after the first banburying treatment to 55-65°C.

[0042] According to the present invention, preferably, the temperature of the second mixing treatment is 55-100° C. and the time is 10-15 minutes.

[0043] According to the present invention, preferably, the temperature of the third banburying treatment is 120-140° C., and the time is 20-40 min.

[0044] According to the present invention, preferably, the extrusion temperature of the self-vulcanizing EPDM reinforcement layer material is not greater than 100°C.

[0045] According to the present invention, preferably, the extrusion temperature of the non-vulcanized butyl adhesive layer material is not greater than 130°C.

[0046] According to the present invention, preferably, the method further comprises wrapping a PET film on the surface of the room temperature self-vulcanized flexible rubber flooding sealing tape by roller pressing.

[0047] The third aspect of the present invention provides the use of the room temperature self-vulcanized flexible rubber flashing sealing tape in waterproofing special-shaped parts of buildings.

[0048] According to the present invention, preferably,

[0049] The building component comprising the special-shaped portion of the building is at least one of a chimney, a ventilation pipe, a wall, a downspout, a window opening, and a door opening;

[0050] The special-shaped parts of the building are at least one of structural corners, downspouts, wall-penetrating pipes and T-joints.

[0051] The beneficial effects of the technical solution of the present invention are as follows:

[0052] Compared to traditional vulcanized rubber belts used for flashing, the product of this invention is a non-vulcanized, malleable, highly extensible, and highly conformable rubber flashing sealing belt. It requires no heating during use, relying on natural heat to gradually self-vulcanize the rubber at room temperature, thereby achieving self-reinforcement of mechanical properties and durability.

[0053] Compared with traditional vulcanized thermosetting rubber belts, the product of the present invention can be laid into any shape according to node requirements during use, and can adapt to the complex and special-shaped requirements of the base layer.

[0054] Compared with traditional sealants and sealing pastes, the product of the present invention is in the form of a tape when used, and contains a shaped reinforced metal mesh sandwich layer. It has the ability to shape the overlapping edges and special-shaped parts while also having a certain mechanical strength. It is easy to construct and can meet the requirements for stress restraint of the coiled material at the node parts.

[0055] The room temperature self-vulcanizing flexible rubber flooding sealing tape of the present invention has good room temperature vulcanization characteristics, waterproofness and sealing properties, and also has excellent adhesion, weather resistance, aging resistance and high and low temperature resistance.

[0056] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0058] Example 1

[0059] This embodiment provides a room temperature self-vulcanized flexible rubber flooding sealing tape, which comprises a self-vulcanized EPDM reinforcement layer, a metal mesh sandwich layer and a non-vulcanized butyl adhesive layer arranged in sequence;

[0060] The raw materials of the self-vulcanized EPDM reinforcement layer include the following components in parts by weight: 100 parts of ethylene propylene diene monomer rubber, 15 parts of polyolefin elastomer with a Mooney viscosity of 20, 30 parts of butyl rubber (IIR), 60 parts of carbon black, 5 parts of zinc stearate, 25 parts of paraffin oil, 10 parts of terpene resin, 6 parts of N-bromoimide, 1 part of UV528, 1 part of scorch retarder p-tert-butylphenol, and 2 parts of cobalt rosinate accelerator;

[0061] The raw materials of the non-vulcanized butyl adhesive layer include the following components in parts by weight: 100 parts of butyl rubber, 75 parts of polyisobutylene with a molecular weight of 1300, 150 parts of calcium carbonate, 8 parts of zinc stearate, 10 parts of paraffin oil, 100 parts of terpene resin, 3 parts of antioxidant 1010 and 1.5 parts of BASF light stabilizer 2020;

[0062] The metal mesh sandwich layer is an aluminum mesh with a thickness of 0.15 mm and a mesh size of 1.5 mm×2.5 mm.

[0063] The preparation method of the above-mentioned room temperature self-vulcanized flexible rubber flooding sealing tape comprises the following steps:

[0064] S1: Preparation of self-vulcanized EPDM reinforcement material

[0065] The EPDM rubber, a polyolefin elastomer with a Mooney viscosity of 20, butyl rubber, carbon black, zinc stearate, paraffin oil, terpene resin, N-bromoimide, UV528, and a scorch retarder (p-tert-butylphenol) were mixed, placed in an internal mixer, kneaded at 120° C. for 30 minutes, and then cooled to 60° C.; the cooled product was mixed with an accelerator, cobalt rosinate, and kneaded at 90-100° C. for 15 minutes to obtain the self-vulcanized EPDM reinforcement layer material, which was then stored at low temperature;

[0066] S2: Preparation of non-sulfurized butyl adhesive layer material

[0067] The butyl rubber, polyisobutylene with a molecular weight of 1300, calcium carbonate, zinc stearate, paraffin oil, terpene resin, antioxidant 1010 and BASF light stabilizer 2020 were placed in an internal mixer and kneaded for 40 minutes until the temperature reached 120-140° C. to obtain the non-vulcanized butyl adhesive layer material;

[0068] S3: The self-vulcanizing EPDM reinforcement layer material and the non-vulcanizing butyl adhesive layer material are placed in two single-screw extruders, and the two materials are respectively calendered onto the two sides of the metal aluminum mesh using an extrusion calender. The screw extrusion temperature of the self-vulcanizing EPDM reinforcement layer material is not greater than 100°C, and the screw extrusion temperature of the non-vulcanizing butyl adhesive layer material is not greater than 130°C. During the extrusion process, the three materials are directly laminated by rollers to obtain the room temperature self-vulcanizing flexible rubber waterproof sealing tape. PET film is then rolled and wrapped on the surface of the room temperature self-vulcanizing flexible rubber waterproof sealing tape and stored at low temperature.

[0069] Examples 2-4 respectively provide a room temperature self-vulcanized flexible rubber flooding sealing belt. The only difference between Examples 2-4 and Example 1 is that the amounts of the components are different. See Tables 1 and 2 for details.

[0070] Table 1 Raw material composition of self-vulcanized EPDM reinforcement layer

[0071]

[0072] Table 2 Raw material composition of non-sulfurized butyl adhesive layer

[0073]

[0074]

[0075] It can be seen from Tables 1 and 2 that no butyl rubber is added to the reinforcing layer of the flooding sealing tape of Comparative Example 1, no vulcanizing agent N-bromoimide is added to the reinforcing layer of the flooding sealing tape of Comparative Example 2, no accelerator cobalt rosinate is added to the reinforcing layer of the flooding sealing tape of Comparative Example 3, and no scorch retarder p-tert-butylphenol is added to the reinforcing layer of the flooding sealing tape of Comparative Example 4.

[0076] Test Case

[0077] In this test example, the performance of the flashing sealing tapes of Examples 1-4 and Comparative Examples 1-4 was tested. The test results are shown in Tables 3 and 4.

[0078] include:

[0079] Changes in mechanical properties of self-vulcanized EPDM reinforcement layer over time at room temperature, test method: GB / T 528-2009;

[0080] Performance tests 30 days after application include: maximum tensile force and elongation at break, 180° peel strength, water impermeability, stress cracking resistance at 130°C, and UV resistance. The test methods refer to JC / T 2679-2022, GB / T23457-2017, GB / T 328.10-2007, GB / T1842-2008, and JC / T 942-2022.

[0081] The results in Table 3 show that the addition of a vulcanizing agent to the waterproof sealing tape can achieve a gradual improvement in mechanical properties at room temperature. The increase in the amount of paraffin oil effectively inhibits the rate of self-vulcanization at room temperature. The introduction of the vulcanizing agent can effectively improve the overall mechanical properties, and the scorch retarder can prevent premature vulcanization and scorching during processing. Compared with Example 1, Comparative Example 1, which does not add butyl rubber, has a lower elongation at break; Comparative Example 2, which does not add a vulcanizing agent, does not undergo vulcanization and crosslinking, resulting in extremely poor mechanical properties; Comparative Example 3, which does not add an accelerator, has a slight decrease in the mechanical properties of the resulting elastomer; and Comparative Example 4, which does not add a scorch retarder, has a premature vulcanization and scorch phenomenon in the resulting elastomer, losing its ductility and adaptability, making it unsuitable for conformable sealing and waterproofing of special-shaped structures.

[0082] Table 3 Changes in mechanical properties of self-vulcanized EPDM reinforcement layers of different embodiments and comparative examples at room temperature over time

[0083] (Tensile Strength T B , MPa; elongation at break E B ,%)

[0084]

[0085] The results in Table 4 show that butyl rubber can effectively improve the bonding between the reinforcing layer and the adhesive layer in the flashing sealing tape. At room temperature, the vulcanizer and accelerator can significantly improve the mechanical properties of the rubber compound, broadening the operating temperature range of the flashing sealing tape. Compared with Example 1, Comparative Example 1, which did not add butyl rubber, showed poor flexibility and adhesion. Under experimental conditions of 130°C for 168 hours, stress cracking occurred in the reinforcing layer, and the peel strength was low. Comparative Example 2, which did not add a vulcanizer, had extremely low tensile strength and failed the water-impermeability test. Due to poor unvulcanized aging performance, the tape hardened and cracked under ultraviolet light, resulting in poor weather resistance. Comparative Example 3, which did not add an accelerator, hardened under ultraviolet aging and showed poor weather resistance. Comparative Example 4, which did not add a scorch retarder, suffered from scorching, and the early flashing sealing tape lost its flexibility, ductility, and adaptability, making it unsuitable for sealing and waterproofing complex, irregularly shaped three-dimensional structures.

[0086] Table 4 Performance test results of flashing sealing tape after 30 days of application

[0087]

[0088] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A room temperature self-vulcanized flexible rubber flooding sealing belt, characterized in that: The flooding sealing tape comprises a self-vulcanized EPDM reinforcement layer, a metal mesh sandwich layer and a non-vulcanized butyl adhesive layer which are arranged in sequence; The raw materials of the self-vulcanizing EPDM reinforcement layer include the following components in parts by weight: 95-105 parts of ethylene propylene diene monomer rubber, 10-50 parts of polyolefin elastomer, 20-60 parts of butyl rubber, 50-150 parts of a first filler, 1-10 parts of a first processing aid, 10-60 parts of a first plasticizer, 5-20 parts of a first tackifying resin, 3-10 parts of a vulcanizing agent, 1-2 parts of an ultraviolet absorber, 0.5-2 parts of a scorch retarder, and 1.5-3 parts of an accelerator; The vulcanizing agent is selected from at least one of N,N,N,N-tetrachlorooxy bisbenzenesulfonamide, N,N,N,N-tetrabromooxy bisbenzenesulfonamide, N-halogenated caprolactam and N-bromoimide; The scorch retarder is selected from at least one of CTP, p-tert-butylphenol and N-cyclohexyl-2-benzothiazole sulfenamide; The accelerator is selected from at least one of cobalt rosinate, cobalt naphthenate, p-benzoquinone dioxime, N,N-diphenylbismaleimide and vinyl methacrylate; The self-vulcanizing EPDM reinforcement layer material is prepared by mixing the ethylene propylene diene monomer (EPDM) rubber, polyolefin elastomer, butyl rubber, a first filler, a first processing aid, a first plasticizer, a first tackifying resin, a vulcanizing agent, an ultraviolet absorber, and a scorch retarder, performing a first banburying process, and cooling the mixture; mixing the cooled mixture with an accelerator and performing a second banburying process to obtain the self-vulcanizing EPDM reinforcement layer material; The raw materials of the non-vulcanized butyl adhesive layer are composed of the following components: butyl rubber, polyisobutylene, a second filler, a second processing aid, a second plasticizer, a second tackifying resin, an antioxidant and a light stabilizer.

2. The room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 1, wherein: The raw materials of the non-vulcanized butyl adhesive layer include the following components in parts by weight: 95-105 parts of butyl rubber, 50-150 parts of polyisobutylene, 100-200 parts of a second filler, 1-10 parts of a second processing aid, 10-30 parts of a second plasticizer, 50-200 parts of a second tackifying resin, 1-3 parts of an antioxidant, and 1-2 parts of a light stabilizer.

3. The room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 1 or 2, wherein: The first filler and the second filler are each independently selected from at least one of carbon black, calcium carbonate, clay and talc; The first processing aid and the second processing aid are each independently selected from at least one of zinc oxide, stearic acid and zinc stearate; The first plasticizer and the second plasticizer are each independently selected from paraffin oil; The first tackifying resin and the second tackifying resin are each independently selected from at least one of C5 petroleum resin, C9 petroleum resin and terpene resin; The Mooney viscosity of the polyolefin elastomer is not greater than 40, and the Vicat softening point is not higher than 50°C; The ultraviolet absorber is UV528 and / or UV531; The polyisobutylene is selected from low molecular weight polyisobutylene with a molecular weight of 1300-2400; The antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant B225; The light stabilizer is at least one of BASF Chimassorb 2020FDL, Chimassorb 944 and Chimassorb 81.

4. The room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 1 or 2, wherein: The metal mesh sandwich layer is aluminum mesh.

5. The room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 4, wherein: The thickness of the aluminum mesh is 0.1-0.2 mm, and the mesh size is (1-2) mm×(2-5) mm.

6. The room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 1, wherein: The first mixing treatment is performed at a temperature of 110-130° C. and for a time of 15-30 minutes; The cooling step is to cool the product after the first mixing treatment to 55-65°C; The temperature of the second mixing treatment is 55-100° C., and the time is 10-15 minutes.

7. The method for preparing the room temperature self-vulcanizing flexible rubber flooding sealing tape according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1: Preparation of self-vulcanized EPDM reinforcement material The EPDM rubber, polyolefin elastomer, butyl rubber, first filler, first processing aid, first plasticizer, first tackifying resin, vulcanizing agent, ultraviolet absorber and scorch retarder are mixed and subjected to a first banburying process, and the temperature is lowered; the cooled product is mixed with an accelerator and subjected to a second banburying process to obtain the self-vulcanizing EPDM reinforcement layer material; S2: Preparation of non-sulfurized butyl adhesive layer material The butyl rubber, polyisobutylene, the second filler, the second processing aid, the second plasticizer, the second tackifying resin, the antioxidant and the light stabilizer are mixed and subjected to a third banburying treatment to obtain the non-vulcanized butyl adhesive layer material; S3: The self-vulcanized EPDM reinforcement layer material and the non-vulcanized butyl adhesive layer material are extruded, calendered, and laminated on both sides of the metal mesh sandwich layer to obtain the room temperature self-vulcanized flexible rubber flooding sealing tape.

8. The method for preparing the room temperature self-vulcanized flexible rubber flooding sealing tape according to claim 7, wherein: The first mixing treatment is performed at a temperature of 110-130° C. and for a time of 15-30 minutes; The cooling step is to cool the product after the first mixing treatment to 55-65°C; The second mixing treatment is performed at a temperature of 55-100°C and for a time of 10-15 minutes; The third mixing treatment is performed at a temperature of 120-140° C. and for a time of 20-40 minutes; The extrusion temperature of the self-vulcanizing EPDM reinforcement layer material is not greater than 100°C; The extrusion temperature of the non-sulfurized butyl adhesive layer material is not greater than 130°C; The method further comprises wrapping a PET film on the surface of the room temperature self-vulcanized flexible rubber waterproof sealing belt by rolling.

9. Use of the room temperature self-vulcanizing flexible rubber flashing sealing tape according to any one of claims 1 to 6 in waterproofing special-shaped parts of buildings.

10. The use according to claim 9, wherein: The building component comprising the special-shaped portion of the building is at least one of a ventilation pipe, a wall, a downspout, a window opening, and a door opening; The special-shaped parts of the building are at least one of structural corners, downspouts, wall-penetrating pipes and T-joints.

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