Butyl rubber damping waterproof coiled material and preparation method thereof

Abstract

The invention relates to the technical field of rubber materials, and discloses a butyl rubber damping waterproof roll and a preparation method thereof. The waterproof roll provided by the invention sequentially comprises a buffering and damping layer, a connecting layer and a butyl rubber waterproof layer. The connecting layer and the buffering and damping layer are sequentially arranged on the surface of the butyl rubber waterproof layer, the multiple micropores are formed in the buffering and damping layer, and part of the structure of the connecting layer is located in the buffering and damping layer, so that the connecting effect of the connecting layer is enhanced, the buffering and damping layer is firmly connected, and the service life of the buffering and damping layer is prolonged. And therefore, the buffering and damping layer plays a long-lasting buffering and protecting role on the butyl rubber waterproof layer. Besides, the buffering and damping layer can reduce the impact influence on the waterproof coiled material when rainwater and hail fall on the surface of the waterproof coiled material through buffering and damping effects, the butyl rubber waterproof layer can be prevented from being directly damaged by impact of the rainwater and hail, exposure to the sun and the like, and the durability of the waterproof effect of the butyl rubber waterproof layer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber materials, and in particular to a butyl rubber shock-absorbing and waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproof layer is widely used in building roof waterproofing system, which is set on the building surface to realize the waterproof function of the building. Since the waterproof layer is directly exposed to the atmosphere, it is easily damaged by environmental factors, such as rain and hail, sunlight, etc. Therefore, the waterproof layer is required to have not only good waterproof and anti-seepage performance, but more importantly, it has good resistance to the outside world and is not easily affected by environmental factors and structural damage.

[0003] In the prior art, for example, the invention patent with application publication number CN109795170A discloses an anti-oxidation polymer composite waterproofing roll, which is composed of a modified asphalt waterproofing roll layer, a butyl rubber waterproofing roll layer, a polyvinyl chloride waterproofing roll layer, a hot melt adhesive layer and an isolation film layer. The surface of the modified asphalt waterproofing roll layer is coated with an oxidation layer to prevent the modified asphalt waterproofing roll layer from being oxidized, thereby shortening the corrosion rate of the waterproofing roll. However, the composite waterproofing roll has the following disadvantages: the connection strength between the composite layers is not strong enough, resulting in looseness between the composite layers. Especially in rainy areas, if it is often hit by heavy rain, it will aggravate the shedding of the composite layers of the waterproofing roll, thereby causing the waterproofing performance to fail. Summary of the invention

[0004] In order to solve the technical problem that the composite layer of the existing waterproof coiled material is easy to fall off, the present invention provides a butyl rubber shock-absorbing waterproof coiled material and a preparation method thereof.

[0005] The specific technical scheme of the present invention is: In one aspect, the present invention provides a butyl rubber shock-absorbing and waterproof coiled material, which comprises a buffer and shock-absorbing layer, a connecting layer, and a butyl rubber waterproof layer in sequence; wherein: The buffering and shock absorbing layer is used to buffer and shock absorbing the material falling onto the coiled material, and is provided with a number of micropores; The connecting layer is used to connect the buffering and shock absorbing layer with the butyl rubber waterproof layer, and part of its structure is located in the buffering and shock absorbing layer.

[0006] The composite layer of the existing waterproofing coiled material is easy to fall off. In order to solve the above problem, the waterproofing coiled material provided by the present invention sequentially arranges a connecting layer and a buffering and shock absorbing layer on the surface of the butyl rubber waterproofing layer. By arranging a number of micropores in the buffering and shock absorbing layer and making a part of the structure of the connecting layer in the buffering and shock absorbing layer, the connecting function of the connecting layer is strengthened, so that the buffering and shock absorbing layer is firmly connected to the surface of the butyl rubber waterproofing layer, and then the buffering and shock absorbing layer plays a lasting buffering and protective role on the butyl rubber waterproofing layer.

[0007] In the waterproof roll material of the present invention, the connecting layer achieves a high-strength bonding effect by placing part of its structure in the buffering and shock-absorbing layer; the effects of the buffering and shock-absorbing layer include the following two: first, there are many micropores on it, and these micropores can guide the adhesive into them during hot pressing, so that part of the structure of the connecting layer is placed in the buffering and shock-absorbing layer, thereby promoting the strengthening of the connecting effect; second, when rain, hail, etc. fall onto the surface of the waterproof roll material, the falling objects are buffered, reducing the impact of rain, hail, etc. on the waterproof roll material, thereby increasing the service life of the waterproof roll material, and the micropores arranged on the buffering and shock-absorbing layer can enhance its buffering and shock-absorbing effect.

[0008] Preferably, the connecting layer comprises the following components in parts by weight: 100 parts of butyl rubber, 30-60 parts of polybutadiene, and 15-30 parts of spherical alumina powder.

[0009] The present invention connects the buffering and shock absorbing layer with the butyl rubber waterproof layer through a connecting layer to form a composite layer. Specifically, the connecting layer is obtained by molding an adhesive. The present invention uses butyl rubber as the main component of the connecting layer to provide the connecting layer with necessary viscosity, ozone resistance and aging resistance. Polybutadiene can form a good blending system with butyl rubber, which can provide flexibility and strength for the connecting layer, thereby improving the tensile strength and tear strength of the waterproof coiled material. At the same time, polybutadiene has oil resistance and solvent resistance, which can improve the ability of the connecting layer to resist the influence of the external environment, thereby improving the durability of the connecting effect of the connecting layer. In particular, another important aspect of the connecting layer of the present invention is the addition of spherical alumina powder. Spherical alumina powder has good fluidity, and because of its unique spherical shape, it can achieve better fluidity in the adhesive. Spherical alumina powder is added to the binder formula. When hot-pressed, it is squeezed and flows into the surface of the buffer and shock-absorbing layer and the micropores near the surface, driving the binder to flow into the surface of the buffer and shock-absorbing layer and the parts near the surface, so that part of the structure of the connection layer is in the buffer and shock-absorbing layer. At the same time, the implementation of the present invention verifies that the waterproof performance of the butyl rubber waterproof membrane is reduced by replacing the spherical alumina powder with other inorganic powders with good fluidity, such as talcum powder, and the strength of the connection layer is significantly reduced after artificial aging.

[0010] The blending state of polybutadiene and butyl rubber is good, which can make the adhesive maintain a certain fluidity and help the adhesive flow into the buffer and shock absorbing layer.

[0011] Further preferably, the connecting layer further comprises 5 to 20 parts of a filler by weight, and the filler is selected from one or more of talc, wollastonite, kaolin, mica powder, and barium sulfate.

[0012] Preferably, the average particle size of the spherical alumina powder is 0.1 to 5 microns.

[0013] Preferably, the raw materials of the buffer and shock absorbing layer include the following components by weight: 100 parts of butadiene rubber, 10-30 parts of polyethylene, 20-60 parts of heavy filler, 5-12 parts of azobisisobutyronitrile, 5-18 parts of azodicarbonamide, 10-20 parts of flame retardant, and 0.1-5 parts of antioxidant.

[0014] Further preferably, the butyl rubber waterproof layer comprises the following components in parts by weight: 100 parts of brominated butyl rubber, 20-40 parts of polycarbonate, 1-10 parts of phenolic resin, 20-40 parts of calcium carbonate, 8-12 parts of paraffin oil, 0.5-2 parts of antioxidant, and 1-5 parts of vulcanizing agent.

[0015] Further preferably, the butyl rubber shock-absorbing and waterproof coiled material provided by the present invention further includes a protective film layer arranged on the surface of the buffering and shock-absorbing layer.

[0016] On the other hand, the present invention provides a method for preparing the above-mentioned butyl rubber shock-absorbing and waterproof membrane, comprising the following steps: Step S1: evenly mix brominated butyl rubber, polycarbonate, phenolic resin, calcium carbonate, paraffin oil, and antioxidant, knead the mixture, add a vulcanizing agent, and extrude the mixture to obtain a butyl rubber waterproof sheet; Step S2: uniformly mixing butadiene rubber, polyethylene, heavy filler, azobisisobutyronitrile, azodicarbonamide, flame retardant, and antioxidant, preheating, and extruding to obtain a cushioning and shock-absorbing sheet; Step S3: preheating the butyl rubber waterproof sheet, the buffer shock-absorbing sheet and the adhesive, coating the adhesive on the surface of the butyl rubber waterproof sheet, stacking a layer of the buffer shock-absorbing sheet, and then hot pressing at a pressure of 0.5-1.2 MPa for 5-10 minutes to obtain the butyl rubber shock-absorbing waterproof membrane.

[0017] Preferably, in step S3, the binder comprises the following components: 100 parts of butyl rubber, 30-60 parts of polybutadiene, 15-30 parts of spherical alumina powder, and 5-20 parts of filler.

[0018] Preferably, in step S2, the preheating temperature is 60-80°C.

[0019] Compared with the prior art, the present invention has the following technical effects: In the waterproof roll material of the present invention, the connection layer achieves a high-strength bonding effect by placing part of its structure in the buffering and shock-absorbing layer; the functions of the buffering and shock-absorbing layer include the following two: first, there are many micropores on it, and these micropores can guide the adhesive into them during hot pressing, so that part of the structure of the connection layer is placed in the buffering and shock-absorbing layer, promoting the strengthening of the connection effect; second, when rainwater falls on the surface of the waterproof roll material, the rainwater is buffered, the impact of rainwater on the waterproof roll material is reduced, and the service life of the waterproof roll material is increased. Therefore, by providing a number of micropores in the buffering and shock-absorbing layer and placing part of the structure of the connection layer in the buffering and shock-absorbing layer, the present invention enables the buffering and shock-absorbing layer to be firmly connected to the surface of the butyl rubber waterproof layer, thereby enabling the buffering and shock-absorbing layer to play a lasting buffering and protective role on the butyl rubber waterproof layer, and the butyl rubber waterproof roll material obtained thereby has a lasting waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the butyl rubber shock-absorbing and waterproof membrane of the present invention.

[0021] Marked in the figure: 1. Buffer and shock-absorbing layer, 2. Connecting layer, 3. Butyl rubber waterproof layer. DETAILED DESCRIPTION

[0022] The present invention provides a butyl rubber shock-absorbing and waterproof coiled material, such as Figure 1 As shown, it includes a buffering and shock absorbing layer 1, a connecting layer 2, and a butyl rubber waterproof layer 3 in sequence; wherein: The buffering and shock absorbing layer is used to buffer and shock absorbing the material falling onto the coiled material, and is provided with a number of micropores; The connecting layer is used to connect the buffering and shock absorbing layer with the butyl rubber waterproof layer, and part of its structure is located in the buffering and shock absorbing layer.

[0023] The composite layer of the existing waterproofing coiled material is easy to fall off. In order to solve the above problem, the waterproofing coiled material provided by the present invention sequentially arranges a connecting layer and a buffering and shock absorbing layer on the surface of the butyl rubber waterproofing layer. By arranging a number of micropores in the buffering and shock absorbing layer and making a part of the structure of the connecting layer in the buffering and shock absorbing layer, the connecting function of the connecting layer is strengthened, so that the buffering and shock absorbing layer is firmly connected to the surface of the butyl rubber waterproofing layer, and then the buffering and shock absorbing layer plays a lasting buffering and protective role for the butyl rubber waterproofing layer. Therefore, the butyl rubber waterproofing coiled material provided by the present invention has a durable waterproof performance.

[0024] In the waterproof roll material of the present invention, the connecting layer achieves a high-strength bonding effect by placing part of the structure in the buffering and shock-absorbing layer; the effects of the buffering and shock-absorbing layer include the following two: first, there are many micropores on it, and these micropores can guide the adhesive into them during hot pressing, so that part of the structure of the connecting layer is placed in the buffering and shock-absorbing layer, forming an interactive state between the connecting layer and the buffering and shock-absorbing layer, and promoting the strengthening of the connecting effect; second, when rain, hail, etc. fall onto the surface of the waterproof roll material, the falling objects are buffered, reducing the impact of rain, hail, etc. on the waterproof roll material, thereby increasing the service life of the waterproof roll material, and the micropores arranged on the buffering and shock-absorbing layer can enhance its buffering and shock-absorbing effect.

[0025] Preferably, the connecting layer comprises the following components in parts by weight: 100 parts of butyl rubber, 30-60 parts of polybutadiene, and 15-30 parts of spherical alumina powder.

[0026] The present invention connects the buffering and shock absorbing layer with the butyl rubber waterproof layer through a connecting layer to form a composite layer. Specifically, the connecting layer is obtained by molding an adhesive. The present invention uses butyl rubber as the main component of the connecting layer to provide the connecting layer with necessary viscosity, ozone resistance and aging resistance. Polybutadiene can form a good blending system with butyl rubber, which can provide flexibility and strength for the connecting layer, thereby improving the tensile strength and tear strength of the waterproof coiled material. At the same time, polybutadiene has oil resistance and solvent resistance, which can improve the ability of the connecting layer to resist the influence of the external environment, thereby improving the durability of the connecting effect of the connecting layer. In particular, another important aspect of the connecting layer of the present invention is the addition of spherical alumina powder. Spherical alumina powder has good fluidity, and because of its unique spherical shape, it can achieve better fluidity in the adhesive. Spherical alumina powder is added to the binder formula. When hot-pressed, it is squeezed and flows into the surface of the buffer and shock-absorbing layer and the micropores near the surface, driving the binder to flow into the surface of the buffer and shock-absorbing layer and the parts near the surface, so that part of the structure of the connecting layer is located in the buffer and shock-absorbing layer.

[0027] The blending state of polybutadiene and butyl rubber is good, which can make the adhesive maintain a certain fluidity and help the adhesive flow into the buffer and shock absorbing layer.

[0028] Further preferably, the connecting layer further comprises 5 to 20 parts of a filler by weight, and the filler is selected from one or more of talc, wollastonite, kaolin, mica powder, and barium sulfate.

[0029] Compared with other resins with better hardness, polybutadiene can make the fluidity of the adhesive forming the connecting layer better. However, with the addition of polybutadiene, and based on the conditions of the present invention where a large amount of polybutadiene is added, the strength of the connecting layer cannot be effectively improved, and the strength and toughness of the connecting layer are not ideal. Therefore, it is necessary to add fillers to improve the toughness and strength of the connecting layer. If polybutadiene is added directly, although the flexibility and strength of the connecting layer can be improved, the fluidity of the adhesive is poor, which is not conducive to the formation of the interactive state between the connecting layer and the buffering and shock-absorbing layer after hot pressing, and the buffering and shock-absorbing layer is relatively easy to fall off.

[0030] Preferably, the average particle size of the spherical alumina powder is 0.1 to 5 microns.

[0031] The important role of spherical alumina powder is to guide the binder to flow into the surface of the buffer and shock absorbing layer and the micropores close to the surface. Therefore, the average particle size of spherical alumina powder should be controlled in the range of 0.1~5 microns. If the particle size is too large, the spherical alumina powder cannot guide the flow into the micropores. If the particle size of the spherical alumina powder is too small, the powder is easy to agglomerate and difficult to disperse.

[0032] Preferably, the raw materials of the buffer and shock absorbing layer include the following components by weight: 100 parts of butadiene rubber, 10-30 parts of polyethylene, 20-60 parts of heavy filler, 5-12 parts of azobisisobutyronitrile, 5-18 parts of azodicarbonamide, 10-20 parts of flame retardant, and 0.1-5 parts of antioxidant.

[0033] Butadiene rubber has excellent resilience, and it has excellent wear resistance, heat resistance, cold resistance, and aging resistance. Therefore, butadiene rubber has a good advantage as a protective layer of the butyl rubber waterproof layer, so that the buffering and shock-absorbing layer as the protective layer has good weather resistance. Polyethylene is blended with butadiene rubber to improve the strength of the buffering and shock-absorbing layer, but polyethylene should not be added too much, otherwise it is not conducive to the formation of a certain number of micropores. Since polyethylene should not be added too much, it is necessary to add heavy fillers to supplement and improve the strength of the buffering and shock-absorbing layer, and improve the processing performance of the raw material composition.

[0034] Further preferably, the butyl rubber waterproof layer comprises the following components in parts by weight: 100 parts of brominated butyl rubber, 20-40 parts of polycarbonate, 1-10 parts of phenolic resin, 20-40 parts of calcium carbonate, 8-12 parts of paraffin oil, 0.5-2 parts of antioxidant, and 1-5 parts of vulcanizing agent.

[0035] The present invention uses brominated butyl rubber as the main component of the waterproof layer, and adds polycarbonate, phenolic resin, calcium carbonate, paraffin oil, antioxidant and vulcanizing agent as auxiliary agents: the cross-linked network formed by the vulcanization of polycarbonate and brominated butyl rubber makes the waterproof layer have good impact resistance and toughness; the phenolic resin is used to enhance the heat resistance and mechanical strength of the waterproof layer and improve the processing performance; the calcium carbonate is used to increase the hardness of the waterproof layer and improve the processing performance; since the waterproof layer is finally formed and needs to go through a vulcanization process, it is necessary to ensure good processing performance of the component mixture, therefore, in the waterproof layer formula of the present invention, paraffin oil is added to improve the processing performance; the addition of the antioxidant can increase the oxidation resistance of the waterproof layer.

[0036] Further preferably, the butyl rubber shock-absorbing and waterproof coiled material provided by the present invention further includes a protective film layer arranged on the surface of the buffering and shock-absorbing layer.

[0037] The buffering and shock absorbing layer in the present invention can reduce the impact of rain and hail falling on the surface of the waterproof membrane by buffering and shock absorbing effects. At the same time, the butyl rubber waterproof layer plays a major waterproof role in the waterproof membrane. The buffering and shock absorbing layer is arranged on the surface of the butyl rubber waterproof layer, which can prevent the butyl rubber waterproof layer from being directly hit by rain and hail, exposed to the sun, etc. Therefore, the buffering and shock absorbing layer has an important protective effect on the waterproof membrane, and the micropores on the buffering and shock absorbing layer play an important role in this process.

[0038] Therefore, the present invention can set a protective film layer on the surface of the buffer and shock-absorbing layer exposed to the environment (the side away from the butyl rubber waterproof layer) to protect the micropores on the buffer and shock-absorbing layer and improve the durability of the waterproof coiled material. The raw material of the protective film layer can be an ordinary raw material for the protective film layer. Preferably, spherical alumina powder can be added to the ordinary raw material for the protective film layer as a guide agent, so that when the protective film layer is formed on the surface of the buffer and shock-absorbing layer by hot pressing, an interactive state of part of the structure of the protective film layer can be formed in the buffer and shock-absorbing layer, thereby improving the connection strength and the durability of the coiled material. For example, the components of the raw material for the protective film layer include the following materials: 100 parts of epoxy resin, 10-20 parts of spherical alumina powder, 5-10 parts of silica powder, 0.8-1.2 parts of ultraviolet absorber, 15-35 parts of polyethylene glycol dibenzoate (plasticizer), 0.5-1 parts of paraffin oil, 5-10 parts of ethylene-vinyl acetate copolymer (EVA), 0.1-0.3 parts of barium stearate, and 0.2-0.5 parts of magnesium stearate.

[0039] The present invention also provides a method for preparing a butyl rubber shock-absorbing and waterproof coiled material, comprising the following steps: Step S1: evenly mix brominated butyl rubber, polycarbonate, phenolic resin, calcium carbonate, paraffin oil, and antioxidant, knead the mixture, add a vulcanizing agent, and extrude the mixture to obtain a butyl rubber waterproof sheet; Step S2: uniformly mixing butadiene rubber, polyethylene, heavy filler, azobisisobutyronitrile (DIBP), azodicarbonamide, flame retardant, and antioxidant, preheating, and extruding to obtain a cushioning and shock-absorbing sheet; Step S3: preheating the butyl rubber waterproof sheet and the buffer shock-absorbing sheet, coating the surface of the butyl rubber waterproof sheet with an adhesive, stacking a layer of buffer shock-absorbing sheet, and then hot-pressing at a pressure of 0.5-1.2 MPa for 5-10 minutes to obtain a butyl rubber shock-absorbing waterproof membrane.

[0040] Preferably, in step S3, the adhesive comprises the following components: 100 parts of butyl rubber, 30-60 parts of polybutadiene, 15-30 parts of spherical alumina powder, and 5-20 parts of filler. The adhesive is hot-pressed to form the above-mentioned connecting layer.

[0041] Preferably, in step S2, the preheating temperature is 60-80°C.

[0042] The formation of micropores is a complex process. The selection of foaming agent, the amount of foaming agent and the foaming process will all affect the formation of micropores. The present invention uses azobisisobutyronitrile and azodicarbonamide in combination to achieve a better foaming effect. The preheating described in step S2 fully activates the foaming agent, which is conducive to the formation of a certain number of micropores.

[0043] The present invention will be further described below in conjunction with embodiments. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following description are generally only embodiments of a part of the present invention, rather than all embodiments. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work should belong to the scope of protection of the present invention.

[0044] Example 1 Provide a waterproof membrane comprising a buffering and shock absorbing layer, a connecting layer, and a butyl rubber waterproof layer in sequence (such as Figure 1 As shown), prepare according to the following steps: Step S1: by weight, 100 parts of brominated butyl rubber, 30 parts of polycarbonate, 5 parts of phenolic resin, 25 parts of calcium carbonate, 10 parts of paraffin oil, and 1.5 parts of antioxidant were mixed at 160° C. for 10 minutes, 3 parts of vulcanizing agent were added and mixed, and then extruded and calendered to obtain a butyl rubber waterproof sheet with a thickness of 3 mm; Step S2: 100 parts of butadiene rubber, 25 parts of polyethylene, 40 parts of heavy calcium carbonate, 15 parts of flame retardant, and 3 parts of antioxidant were mixed by weight, and then kneaded at 70° C. for 5 minutes, 8 parts of DIBP and 10 parts of azodicarbonamide were added and mixed evenly, and the mixture was kept at 70° C. for 1 minute to preheat, and then extruded to obtain a cushioning and shock-absorbing sheet with a thickness of 1.8 mm; Step S3: 100 parts by weight of butyl rubber are stirred at 160° C. for 25 minutes, and then 45 parts of polybutadiene, 20 parts of spherical alumina powder (average particle size of 1.5 μm), 8 parts of talc, 4 parts of wollastonite, and 2 parts of barium sulfate are added, and stirring is continued for 1 hour to obtain a binder.

[0045] Step S4: preheat the butyl rubber waterproof sheet and the buffer shock-absorbing sheet to 60°C, apply the adhesive to the surface of the butyl rubber waterproof sheet while it is hot, and stack a layer of buffer shock-absorbing sheet on the side coated with the adhesive, and then heat press at 60°C and 0.8MPa for 8 minutes to form a connecting layer with the adhesive, dry to obtain a composite sheet, put the composite sheet into a vulcanizer, and vulcanize for 2.5 minutes to obtain a butyl rubber shock-absorbing waterproof roll. After testing, the thickness of the connecting layer is 0.6mm (measured by the distance between the opposite surfaces of the butyl rubber waterproof sheet and the buffer shock-absorbing sheet).

[0046] Example 2 Provide a waterproof membrane comprising a buffering and shock absorbing layer, a connecting layer, and a butyl rubber waterproof layer in sequence (such as Figure 1 As shown), prepare according to the following steps: Step S1: by weight, 100 parts of brominated butyl rubber, 20 parts of polycarbonate, 10 parts of phenolic resin, 20 parts of calcium carbonate, 8 parts of paraffin oil, and 0.5 parts of antioxidant are mixed at 160° C. for 10 minutes, 1 part of vulcanizing agent is added, mixed, extruded, and calendered to obtain a butyl rubber waterproof sheet with a thickness of 3 mm; Step S2: 100 parts of butadiene rubber, 10 parts of polyethylene, 20 parts of heavy calcium carbonate, 10 parts of flame retardant, and 0.1 parts of antioxidant were mixed by weight, and kneaded at 60° C. for 5 minutes, 5 parts of DIBP and 18 parts of azodicarbonamide were added and mixed evenly, and the mixture was kept at 60° C. for 1 minute to preheat, and then extruded to obtain a cushioning and shock-absorbing sheet with a thickness of 1.8 mm; Step S3: 100 parts of butyl rubber are taken by weight and stirred at 160° C. for 25 minutes, and then 30 parts of polybutadiene, 15 parts of spherical alumina powder (average particle size of 1.5 μm), 8 parts of talc, 4 parts of wollastonite, and 2 parts of barium sulfate are added, and stirring is continued for 1 hour to obtain a binder.

[0047] Step S4: preheat the butyl rubber waterproof sheet and the buffer shock-absorbing sheet to 60°C, apply the adhesive to the surface of the butyl rubber waterproof sheet while it is hot, and stack a layer of buffer shock-absorbing sheet on the side coated with the adhesive, and then heat press at 60°C and 0.5MPa for 10 minutes to form a connecting layer with the adhesive, dry to obtain a composite sheet, put the composite sheet into a vulcanizer, and vulcanize for 3 minutes to obtain a butyl rubber shock-absorbing waterproof roll. After testing, the thickness of the connecting layer is 0.6mm (measured by the distance between the opposite surfaces of the butyl rubber waterproof sheet and the buffer shock-absorbing sheet).

[0048] Example 3 Provide a waterproof membrane comprising a buffering and shock absorbing layer, a connecting layer, and a butyl rubber waterproof layer in sequence (such as Figure 1 As shown), prepare according to the following steps: Step S1: by weight, 100 parts of brominated butyl rubber, 40 parts of polycarbonate, 1 part of phenolic resin, 40 parts of calcium carbonate, 12 parts of paraffin oil, and 2 parts of antioxidant are mixed at 160° C. for 10 minutes, 5 parts of vulcanizing agent are added, mixed, extruded, and calendered to obtain a butyl rubber waterproof sheet with a thickness of 3 mm; Step S2: 100 parts of butadiene rubber, 30 parts of polyethylene, 60 parts of heavy calcium carbonate, 20 parts of flame retardant, and 5 parts of antioxidant were mixed by weight, and then kneaded at 80° C. for 5 minutes, 12 parts of DIBP and 5 parts of azodicarbonamide were added and mixed evenly, and the mixture was kept at 80° C. for 1 minute to preheat, and then extruded to obtain a cushioning and shock-absorbing sheet with a thickness of 1.8 mm; Step S3: Take 100 parts of butyl rubber by weight and stir them at 160° C. for 25 minutes, then add 60 parts of polybutadiene, 30 parts of spherical alumina powder (average particle size of 5.0 μm), 8 parts of talc, 4 parts of wollastonite, and 2 parts of barium sulfate, and continue stirring for 2 hours to obtain a binder.

[0049] Step S4: preheat the butyl rubber waterproof sheet and the buffer shock-absorbing sheet to 60°C, apply the adhesive to the surface of the butyl rubber waterproof sheet while it is hot, and stack a layer of buffer shock-absorbing sheet on the side coated with the adhesive, and then heat press at 60°C and 1.2MPa for 5 minutes to form a connecting layer with the adhesive, dry to obtain a composite sheet, put the composite sheet into a vulcanizer, and vulcanize for 2.5 minutes to obtain a butyl rubber shock-absorbing waterproof roll. After testing, the thickness of the connecting layer is 0.6mm (measured by the distance between the opposite surfaces of the butyl rubber waterproof sheet and the buffer shock-absorbing sheet).

[0050] Example 4 A waterproof roll material including a buffering and shock absorbing layer, a connecting layer, and a butyl rubber waterproof layer is provided, and is prepared according to the following steps: Step S1: by weight, 100 parts of brominated butyl rubber, 30 parts of polycarbonate, 5 parts of phenolic resin, 25 parts of calcium carbonate, 10 parts of paraffin oil, and 1.5 parts of antioxidant were mixed at 160° C. for 10 minutes, 3 parts of vulcanizing agent were added and mixed, and then extruded and calendered to obtain a butyl rubber waterproof sheet with a thickness of 3 mm; Step S2: 100 parts of butadiene rubber, 25 parts of polyethylene, 40 parts of heavy calcium carbonate, 15 parts of flame retardant, and 3 parts of antioxidant were mixed by weight, and then kneaded at 70° C. for 5 minutes, 8 parts of DIBP and 10 parts of azodicarbonamide were added and mixed evenly, and the mixture was kept at 70° C. for 1 minute to preheat, and then extruded to obtain a cushioning and shock-absorbing sheet with a thickness of 1.8 mm; Step S3: 100 parts by weight of butyl rubber are stirred at 160° C. for 25 minutes, and then 45 parts of polybutadiene, 20 parts of spherical alumina powder (average particle size of 1.5 μm), 8 parts of talc, 4 parts of wollastonite, and 2 parts of barium sulfate are added, and stirring is continued for 1 hour to obtain a binder.

[0051] Step S4: preheat the butyl rubber waterproof sheet and the buffer shock-absorbing sheet to 60°C, apply the adhesive to the surface of the butyl rubber waterproof sheet while it is hot, and stack a layer of buffer shock-absorbing sheet on the side coated with the adhesive, then heat press at 60°C at a pressure of 0.8MPa for 8 minutes to form the first connecting layer of the adhesive, dry it, apply the adhesive on the surface of the buffer shock-absorbing sheet away from the connecting layer, and stack a layer of protective film, then heat press at 60°C at a pressure of 0.8MPa for 10 minutes to obtain a composite sheet, put the composite sheet into a vulcanizer, and vulcanize it for 3 minutes to obtain a butyl rubber shock-absorbing waterproof roll. After testing, the thickness of the first connecting layer is 0.6mm (measured by the distance between the relative surfaces of the butyl rubber waterproof sheet and the buffer shock-absorbing sheet). Among them, the protective film takes raw materials according to its component formula, and obtains a protective film with a thickness of 0.5mm through mixing, extrusion, and calendaring. The component formula of the protective film is: 100 parts of epoxy resin, 15 parts of spherical alumina powder, 5 parts of silica powder, 1 part of ultraviolet absorber, 20 parts of polyethylene glycol dibenzoate, 0.5 parts of paraffin oil, 10 parts of ethylene-vinyl acetate copolymer, 0.1 parts of barium stearate, and 0.5 parts of magnesium stearate.

[0052] Example 5 Compared with Example 1, the only difference is that in step S3, 8 parts of talc, 4 parts of wollastonite and 2 parts of barium sulfate are not added. The rest is the same as Example 1.

[0053] Comparative Example 1 Compared with Example 1, the only difference is that in step S2, 8 parts of DIBP are not added. The rest is the same as Example 1.

[0054] Comparative Example 2 Compared with Example 1, the only difference is that in step S2, 10 parts of azodicarbonamide are not added. Others are the same as Example 1.

[0055] Comparative Example 3 Compared with Example 1, the only difference is that in step S2, the number of azodicarbonamide added is 25 parts. The rest is the same as Example 1.

[0056] Comparative Example 4 Compared with Example 1, the only difference is that in step S3, spherical alumina powder is not added. Other steps are the same as Example 1.

[0057] Comparative Example 5 Compared with Example 1, the only difference is that in step S3, the average particle size of the spherical alumina powder added is 6.8 microns. The rest is the same as Example 1.

[0058] Comparative Example 6 Compared with Example 1, the only difference is that in step S3, 20 parts of spherical alumina powder are replaced with 20 parts of talc powder. The rest is the same as Example 1.

[0059] Comparative Example 7 Compared with Example 1, the only difference is that in step S4, the hot pressing pressure is 0.3 MPa. The rest is the same as Example 1.

[0060] Comparative Example 8 Compared with Example 1, the only difference is that in step S4, the hot pressing pressure is 1.6 MPa. The rest is the same as Example 1.

[0061] Performance Testing The butyl rubber shock-absorbing and waterproof membranes obtained in Examples 1 to 5 and Comparative Examples 1 to 8 were tested for strength and waterproof performance, and the test results are shown in Table 1. The membrane performance test was conducted in accordance with GB / T 12952, and the test conditions for water impermeability were: 2 hours, pressure 0.3 MPa; the peel strength after aging was the peel strength result of the membrane after 72 hours of simulated rainwater dripping, and the rainwater dripping conditions were: temperature 60°C, pressure 0.3 MPa.

[0062] Table 1 Tensile strength (MPa) Peel strength (N / mm) Peel strength after aging (N / mm) Waterproof Example 1 12.8 0.86 0.85 No leakage Example 2 12.3 0.85 0.82 No leakage Example 3 12.0 0.87 0.85 No leakage Example 4 13.7 0.87 0.86 No leakage Example 5 11.2 0.79 0.68 No obvious leakage Comparative Example 1 11.3 0.79 0.66 No obvious leakage Comparative Example 2 10.0 0.78 0.51 Obvious leakage Comparative Example 3 8.7 0.60 0.43 No obvious leakage Comparative Example 4 8.4 0.64 0.45 Obvious leakage Comparative Example 5 9.1 0.69 0.50 Obvious leakage Comparative Example 6 8.3 0.61 0.43 Minor leakage Comparative Example 7 8.7 0.65 0.43 Obvious leakage Comparative Example 8 8.5 0.68 0.45 No obvious leakage From Table 1, we can see that: (1) The butyl rubber waterproofing membrane provided by the present invention has a plurality of micropores in the buffering and shock-absorbing layer, and a part of the structure of the connecting layer is located in the buffering and shock-absorbing layer, so that the buffering and shock-absorbing layer can be firmly connected to the surface of the butyl rubber waterproofing layer, and the peeling strength after aging is relatively high. Therefore, it can be seen that the buffering and shock-absorbing layer of the present invention can play a long-lasting buffering and protective role for the butyl rubber waterproofing layer, and the butyl rubber waterproofing membrane provided by the present invention has a long-lasting waterproof performance. At the same time, the butyl rubber waterproofing membrane provided by the present invention has excellent strength.

[0063] (2) Comparative analysis of Comparative Examples 1 to 3 with Example 1: Azobisisobutyronitrile and azodicarbonamide are used as foaming agents, which mainly affect the formation process of micropores. Comparative analysis of Comparative Examples 1 and 2 with the example shows that the present invention uses azobisisobutyronitrile and azodicarbonamide in combination to achieve a better foaming effect, which is beneficial to forming an interactive structure in which part of the structure of the connecting layer is located in the buffering and shock-absorbing layer, and is beneficial to strengthening the connection effect of the connecting layer. It can be seen from Comparative Example 3 that too much azodicarbonamide should not be added. The reason is that too much azodicarbonamide may lead to an excessive number of micropores and an excessively large size of micropores, which will result in the connection strength of the connecting layer being insufficient even if it enters the buffering and shock-absorbing layer, so the tensile strength will decrease significantly.

[0064] (3) The comparison between Comparative Examples 4 to 6 and Example 1 shows the importance of adding spherical alumina powder into the connecting layer.

[0065] (4) By comparing and analyzing Comparative Examples 7 to 8 with Example 1, it can be seen that the pressure of hot pressing mainly affects the process of the spherical alumina powder guiding the adhesive into the buffer and shock absorbing layer. When the pressure is not in the range of 0.5-1.2 MPa, the peel strength decreases significantly after aging. It can be seen that the hot pressing of the present invention should be carried out with a relatively small pressure and a long hot pressing time, otherwise it will affect the connection effect of the adhesive.

[0066] The vulcanizing agent used in the present invention is stannous chloride, the oxidizing agent used in the present invention is 2,6-di-tert-butyl-p-cresol (BHT), and the flame retardant used in the present invention is aluminum hydroxide.

[0067] The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A butyl rubber shock-absorbing and waterproof coiled material, characterized in that: It includes a buffering and shock absorbing layer, a connecting layer, and a butyl rubber waterproof layer in sequence; wherein: The buffering and shock absorbing layer is used to buffer and shock absorbing the material falling onto the coiled material, and is provided with a number of micropores; The connecting layer is used to connect the buffering and shock absorbing layer with the butyl rubber waterproof layer, and part of its structure is located in the buffering and shock absorbing layer.

2. The butyl rubber shock-absorbing and waterproofing membrane according to claim 1, characterized in that: The connecting layer comprises the following components by weight: 100 parts of butyl rubber, 30-60 parts of polybutadiene, and 15-30 parts of spherical alumina powder.

3. The butyl rubber shock-absorbing and waterproofing membrane according to claim 2, characterized in that: In parts by weight, the connecting layer further comprises 5 to 20 parts of a filler, and the filler is selected from one or more of talc, wollastonite, kaolin, mica powder, and barium sulfate.

4. The butyl rubber shock-absorbing and waterproofing membrane according to claim 2, characterized in that: The average particle size of the spherical alumina powder is 0.1-5 microns.

5. The butyl rubber shock-absorbing and waterproofing membrane according to claim 1, characterized in that: The raw materials of the buffer and shock absorbing layer include the following components by weight: 100 parts of butadiene rubber, 10-30 parts of polyethylene, 20-60 parts of heavy filler, 5-12 parts of azobisisobutyronitrile, 5-18 parts of azodicarbonamide, 10-20 parts of flame retardant, and 0.1-5 parts of antioxidant.

6. The butyl rubber shock-absorbing and waterproofing membrane according to claim 1, characterized in that: The butyl rubber waterproof layer comprises the following components by weight: 100 parts of brominated butyl rubber, 20-40 parts of polycarbonate, 1-10 parts of phenolic resin, 20-40 parts of calcium carbonate, 8-12 parts of paraffin oil, 0.5-2 parts of antioxidant, and 1-5 parts of vulcanizing agent.

7. The butyl rubber shock-absorbing and waterproofing membrane according to claim 1, characterized in that: It also includes a protective film layer arranged on the surface of the buffer and shock-absorbing layer.

8. The method for preparing the butyl rubber shock-absorbing and waterproof coiled material according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: evenly mix brominated butyl rubber, polycarbonate, phenolic resin, calcium carbonate, paraffin oil, and antioxidant, knead the mixture, add a vulcanizing agent, and extrude the mixture to obtain a butyl rubber waterproof sheet; Step S2: uniformly mixing butadiene rubber, polyethylene, heavy filler, azobisisobutyronitrile, azodicarbonamide, flame retardant, and antioxidant, preheating, and extruding to obtain a cushioning and shock-absorbing sheet; Step S3: After coating the surface of the butyl rubber waterproof sheet with an adhesive, a layer of buffering and shock-absorbing sheet is stacked, and then hot-pressed at a pressure of 0.5-1.2 MPa to obtain a butyl rubber shock-absorbing and waterproof membrane.

9. The preparation method according to claim 8, characterized in that: In step S2, the preheating temperature is 60-80°C.

10. The preparation method according to claim 8, characterized in that: In step S3, the hot pressing time is 5 to 10 minutes.

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