Environmentally friendly weather-resistant PVC waterproof coiled material and preparation method thereof

Abstract

The present invention relates to a field of building materials (IPC classification number: E04D15 / 06), and in particular to a novel environmentally friendly weather-resistant PVC waterproofing coiled material and a preparation method thereof. The novel environmentally friendly weather-resistant PVC waterproofing coiled material of the present invention comprises a highly weather-resistant PVDF layer, an adhesive layer and a soft PVC layer. The novel environmentally friendly weather-resistant PVC waterproofing coiled material prepared by the present invention avoids liquid infiltration and curling of waterproof corners by adopting a three-layer structure of a highly weather-resistant PVDF layer, an adhesive layer and a soft PVC composite. The adhesive layer prepared by the present invention laminates the PVDF layer and the soft PVC layer, which also avoids lateral water seepage, thereby improving the waterproof performance of the waterproofing coiled material as a whole. The waterproofing coiled material prepared at the same time also has good low temperature resistance, high temperature resistance and weather resistance. Compared with traditional waterproofing coiled materials, it has the advantages of high weather resistance, green environmental protection, energy saving and high efficiency, and meets the standard requirements of environmentally friendly and resource-saving society for materials and processes.

Description

Technical Field

[0001] The present invention relates to the field of building materials (IPC classification number: E04D15 / 06), and in particular to an environmentally friendly weather-resistant PVC waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproofing membranes are often used in building walls, roofs, tunnels, roads, landfills, etc. to prevent the leakage of rainwater and groundwater. Waterproofing membranes are the first barrier to waterproofing the entire project and play a vital role in the entire project. The main products are asphalt waterproofing membranes and polymer waterproofing membranes.

[0003] At present, domestic high-weather-resistant waterproof membranes mainly include the following categories. The first category is to directly modify the raw materials to improve the weather resistance of the waterproof membrane; the second category is to improve the weather resistance of the waterproof membrane by shielding methods, such as film-coated waterproof membranes.

[0004] Patent application CN103088923B discloses a modified waterproofing roll, and the modified composite waterproofing roll prepared by the modified composite waterproofing roll has strong mechanical properties, good weather resistance, and is waterproof and leakproof, but the anti-aging agent in the raw materials for preparation is slowly consumed over time, so the service life of the waterproofing roll prepared by this invention is greatly limited. Patent application CN104553185A discloses a modified fluorocarbon film butyl rubber composite waterproofing roll and a preparation method thereof. The waterproofing roll prepared by this invention has good durability, but such fluorocarbon film-shielded waterproofing rolls usually use glue and various solvents, such as polyurethane glue, ethyl acetate, butyl acetate or cyclohexanone, etc. The volatilization of the solvent during the curing process will cause certain damage to the environment, which is not environmentally friendly and does not conform to the green development path advocated by the country.

[0005] The PVC waterproofing membrane of the present invention does not require the use of any glue or solvent during the production and compounding process, and no harmful substances are volatilized. Compared with traditional waterproofing membranes, it has the advantages of high weather resistance, green environmental protection, energy saving and high efficiency, and meets the standard requirements of environmentally friendly and resource-saving society for materials and processes. Summary of the invention

[0006] In order to solve the above problems, the first aspect of the present invention provides a field of building materials (IPC classification number: E04D15 / 06), and in particular, an environmentally friendly weather-resistant PVC waterproof membrane and a preparation method thereof.

[0007] As a preferred solution, the high weather-resistant PVDF layer is 5 μm to 50 μm;

[0008] As a preferred solution, the high weather-resistant PVDF layer is 20 μm to 35 μm;

[0009] As a preferred solution, the thickness of the bonding layer is 10 μm to 80 μm;

[0010] As a preferred solution, the thickness of the bonding layer is 40-50 μm;

[0011] As a preferred solution, the soft PVC layer has a thickness of 50 μm to 200 μm;

[0012] As a preferred solution, the soft PVC layer has a thickness of 100 μm to 150 μm;

[0013] As a preferred solution, the high weather-resistant PVDF, calculated by weight, comprises at least the following raw materials: 50-70 parts of PVDF resin, 10-30 parts of filler, 9-11 parts of ACR impact modifier, 3-10 parts of compatibilizer, 0.05-5 parts of antioxidant, and 0.05-5 parts of benzotriazole compound.

[0014] As a preferred solution, the high weather resistant PVDF, in parts by weight, comprises at least the following raw materials: 55-60 parts of PVDF resin, 15-20 parts of filler, 9-11 parts of ACR impact modifier, 4-6 parts of compatibilizer, 0.5-3 parts of antioxidant, and 0.5-3 parts of benzotriazole compound.

[0015] As a preferred solution, the melt index of the PVDF resin is 26.0-27.0 g / 10min, 230°C, 5.0kg.

[0016] As a preferred solution, the filler is one or more of nano calcium carbonate, whisker reinforcement, and titanium dioxide.

[0017] As a preferred solution, the filler is titanium dioxide purchased from Huntsman TR-28.

[0018] As a preferred solution, the benzotriazole compound is purchased from BASF UV-P.

[0019] As a preferred solution, the ACR impact modifier is an ACR (acrylate) impact modifier with a core-shell structure, purchased from Dow 2311.

[0020] As a preferred solution, the weight ratio of the PVDF resin to the ACR impact modifier is (5-7):1.

[0021] As a preferred solution, the weight ratio of the PVDF resin to the ACR impact modifier is 6:1.

[0022] As a preferred solution, the compatibilizer is one or more of ethylene acrylic acid copolymer, ethylene methyl acrylate copolymer, ethylene ethyl acrylate copolymer, and ethylene vinyl acetate copolymer.

[0023] As a preferred solution, the compatibilizer is ethylene methyl acrylate copolymer.

[0024] As a preferred solution, the ethylene methyl acrylate copolymer has a melt index of 7.5-8.5 g / 10 min (190° C. / 2.16 kg) and is commercially available, such as Dow AC1820.

[0025] As a preferred solution, the bonding layer is a modified material of acrylic resin and methacrylic resin.

[0026] As a preferred solution, the acrylic resin and methacrylic resin modified materials include, by weight, at least 20 to 50 parts of polymethacrylic resin, 50 to 80 parts of acrylic resin, 0.1 to 2 parts of antioxidant, 0.1 to 2 parts of hydrolysis resistance agent, and 0.1 to 2 parts of ultraviolet absorber.

[0027] As a preferred solution, the acrylic resin and methacrylic resin modified materials include, by weight, at least 30-40 parts of polymethacrylic resin, 60-70 parts of acrylic resin, 0.1-2 parts of antioxidant, 0.1-2 parts of hydrolysis resistance agent, and 0.1-2 parts of ultraviolet absorber.

[0028] As a preferred solution, the weight average molecular weight of the polymethacrylic acid resin is 100,000-110,000; the viscosity of the polymethacrylic acid resin is 260 Cp at 23° C., and is commercially available, such as LG IF850B from South Korea.

[0029] As a preferred solution, the acrylic resin is WSD-1722, purchased from Changzhou Weston Adhesive Materials Co., Ltd.

[0030] As a preferred solution, the weight ratio of the polymethacrylic resin to the acrylic resin is 1:(1.5-2).

[0031] As a preferred solution, the anti-hydrolysis agent is polycarbocyanine UN-03.

[0032] As a preferred solution, the ultraviolet absorber is a benzophenone compound purchased from BASF UV-531.

[0033] The antioxidants in the present invention are all the same substance.

[0034] As a preferred solution, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168.

[0035] As a preferred solution, the weight ratio of the antioxidant 1010 to the antioxidant 168 is (1-2):1.

[0036] As a preferred solution, the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:1.

[0037] As a preferred solution, the raw materials of the soft PVC layer include at least 50-80 parts of PVC resin powder, 20-60 parts of plasticizer, 2-6 parts of calcium-zinc composite stabilizer, and 5-20 parts of talc powder, calculated by weight.

[0038] As a preferred solution, the raw materials of the soft PVC layer include at least 60-70 parts of PVC resin powder, 30-40 parts of plasticizer, 2-6 parts of calcium-zinc composite stabilizer, and 10-15 parts of talc powder, by weight.

[0039] As a preferred solution, the PVC resin powder is commercially available, such as DN433 sold by Shandong Dengnuo New Material Technology Co., Ltd.

[0040] As a preferred solution, the plasticizer is one or more of dioctyl phthalate (DOP), diisodecyl phthalate (DIDP), and trioctyl trimellitate (TOTM).

[0041] As a preferred solution, the plasticizer is dioctyl phthalate, which is commercially available from Shandong Xinyujia Chemical Co., Ltd.

[0042] As a preferred solution, the filler is one or more of talc, attapulgite, and calcium carbonate.

[0043] As a preferred solution, the talcum powder has an average particle size of 1700-2200 meshes and is purchased from Lingshou County Shengyun Mineral Products Processing Plant.

[0044] The second aspect of the present invention provides a method for preparing an environmentally friendly weather-resistant PVC waterproof coiled material, the steps of which mainly include:

[0045] (1) A blended layer of a high weather-resistant PVDF layer and a bonding layer is prepared by co-extrusion of a casting device;

[0046] (2) A single-layer casting is performed through a casting device to obtain a soft PVC layer;

[0047] (3) The high weather-resistant PVDF layer and the bonding layer blended layer in step (1) and the soft PVC layer in step (2) are hot-pressed by a laminating machine at a temperature of 120° C. to 160° C. to obtain an environmentally friendly weather-resistant PVC waterproof membrane.

[0048] Beneficial effects:

[0049] 1. In the present invention, when the weight ratio of PVDF resin to ACR impact modifier is (5-7):1, the impact resistance and weather resistance of the high weather resistant PVDF layer are effectively improved, and the low temperature resistance of the high weather resistant PVDF layer is also improved.

[0050] 2. The present invention uses the synergistic effect of ethylene methyl acrylate copolymer with a melt index of 7.5-8.5 g / 10min and PVDF resin with a melt index of 26.0-27.0 g / 10min to effectively improve the compatibility in the high weather resistant PVDF layer system while also improving the bonding effect between the high weather resistant PVDF layer and the bonding layer.

[0051] 3. The present invention effectively improves the compatibility of the system by limiting the weight ratio of the polymethacrylic resin with a weight average molecular weight of 100,000 to 110,000 and a viscosity of 250 to 270 Cp to the acrylic resin to 1: (1.5 to 2), thereby improving the bonding force of the bonding layer and also improving the hardness of the bonding layer.

[0052] 4. The environmentally friendly weather-resistant PVC waterproofing membrane prepared by the present invention adopts a three-layer structure of a highly weather-resistant PVDF layer, an adhesive layer and a soft PVC composite, thereby avoiding liquid infiltration and curling of waterproof corners. At the same time, the adhesive layer prepared by the present invention laminates the PVDF layer and the soft PVC layer, thereby also avoiding side water seepage, thereby improving the waterproofing performance of the waterproofing membrane as a whole. At the same time, the waterproofing membrane prepared also has good low temperature resistance, high temperature resistance and weather resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic diagram of the structure of environmentally friendly weather-resistant PVC waterproof membrane.

[0054] In the figure: 1. High weather-resistant PVDF layer; 2. Adhesive layer; 3. Soft PVC layer. DETAILED DESCRIPTION

[0055] Example

[0056] Example 1

[0057] Embodiment 1 of the present invention provides an environmentally friendly weather-resistant PVC waterproof coiled material, comprising a high weather-resistant PVDF layer, an adhesive layer and a soft PVC layer.

[0058] The high weather-resistant PVDF layer in this embodiment is 30 μm;

[0059] The thickness of the bonding layer in this embodiment is 45 μm;

[0060] The thickness of the soft PVC layer in this embodiment is 125 μm;

[0061] The high weather-resistant PVDF in this embodiment includes, by weight, 60 parts of PVDF resin, 20 parts of filler, 10 parts of ACR impact modifier, 7 parts of compatibilizer, 2 parts of antioxidant, and 2 parts of UV absorber.

[0062] The melt index of the PVDF resin in this example is 26.4 g / 10 min, 230° C., 5.0 kg, and HEVER-201 purchased from Ruyuan Gongyangguang Fluororesin Co., Ltd.

[0063] The filler in this embodiment is titanium dioxide, purchased from Huntsman TR-28.

[0064] The UV absorber in this embodiment is a benzotriazole compound purchased from BASF UV-P.

[0065] The ACR impact modifier in this embodiment is an ACR (acrylate) impact modifier with a core-shell structure, purchased from Dow 2311.

[0066] In this embodiment, the compatibilizer is ethylene methyl acrylate copolymer. The ethylene methyl acrylate copolymer has a melt index of 8 g / 10 min (190° C. / 2.16 kg) and is purchased from Dow AC1820 in the United States.

[0067] The bonding layer in this embodiment is a modified material of acrylic resin and methacrylic resin. The raw materials include, by weight: 30 parts of polymethacrylic resin, 65 parts of acrylic resin, 1 part of antioxidant, 1 part of anti-hydrolysis agent, and 1 part of ultraviolet absorber.

[0068] The weight average molecular weight of the polymethacrylic acid resin in this embodiment is MW=103000; the viscosity of the polymethacrylic acid resin is 260 Cp, 23° C., and it is purchased from LG IF850B in South Korea.

[0069] The acrylic resin in this embodiment is WSD-1722, which is purchased from Changzhou Weston Adhesive Materials Co., Ltd.

[0070] The anti-hydrolysis agent in this embodiment is polycarbocyanine UN-03, which is purchased from Shanghai Youen Chemical Co., Ltd.

[0071] The antioxidants in this embodiment are the same substance.

[0072] In this embodiment, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168.

[0073] In this embodiment, the weight ratio of antioxidant 1010 to antioxidant 168 is 1: 1. The antioxidant 1010 and antioxidant 168 are both purchased from BASF.

[0074] The ultraviolet absorber in this embodiment is a benzophenone compound purchased from BASF UV-531.

[0075] The soft PVC layer in this embodiment includes, by weight, 65 parts of PVC resin powder, 40 parts of plasticizer, 4 parts of calcium-zinc composite stabilizer, and 12 parts of talcum powder.

[0076] The PVC resin powder in this embodiment was purchased from DN433 sold by Shandong Dengnuo New Material Technology Co., Ltd.

[0077] The plasticizer in this embodiment is dioctyl phthalate, which was purchased from Shandong Xinyujia Chemical Co., Ltd.

[0078] The calcium zinc stabilizer in this example was purchased from Jinan Huijinchuan Trading Co., Ltd.

[0079] The average particle size of the talcum powder in this embodiment is 2000 mesh, which is purchased from Lingshou County Shengyun Mineral Products Processing Plant.

[0080] This embodiment provides a method for preparing an environmentally friendly weather-resistant PVC waterproof coiled material, the steps of which include:

[0081] (1) A blended layer of a high weather-resistant PVDF layer and a bonding layer is prepared by co-extrusion of a casting device;

[0082] (2) A single-layer casting is performed through a casting device to obtain a soft PVC layer;

[0083] (3) The high weather-resistant PVDF layer and the bonding layer blended layer in step (1) and the soft PVC layer in step (2) are hot-pressed by a laminating machine at a temperature of 140° C. to obtain an environmentally friendly weather-resistant PVC waterproof membrane.

[0084] Example 2

[0085] The specific implementation of Example 2 is the same as that of Example 1; the difference is that Example 2 provides an environmentally friendly weather-resistant PVC waterproof membrane, including a high weather-resistant PVDF (polyvinylidene fluoride) layer, an adhesive layer and a soft PVC (polyvinyl chloride) layer.

[0086] The highly weather-resistant PVDF layer in this embodiment is 50 μm;

[0087] The thickness of the bonding layer in this embodiment is 35 μm;

[0088] The thickness of the soft PVC layer in this embodiment is 150 μm;

[0089] Example 3

[0090] The specific implementation of Example 3 is the same as that of Example 1; the difference is that the high weather-resistant PVDF described in Example 3 includes, by weight, 60 parts of PVDF resin, 20 parts of filler, 11 parts of ACR impact modifier, 8 parts of compatibilizer, 3 parts of antioxidant, and 3 parts of benzotriazole compound.

[0091] Example 4

[0092] The specific implementation of Example 4 is the same as that of Example 1, except that the bonding layer of Example 3 is a modified material of acrylic resin and methacrylic resin. The modified material of acrylic resin and methacrylic resin comprises, by weight, 40 parts of polymethacrylic resin, 70 parts of acrylic resin, 2 parts of antioxidant, 2 parts of anti-hydrolysis agent, and 2 parts of ultraviolet absorber.

[0093] Example 5

[0094] The specific implementation of Example 5 is the same as that of Example 1; the difference is that the soft PVC layer in Example 5 includes, by weight, 70 parts of PVC resin powder, 40 parts of plasticizer, 6 parts of calcium-zinc composite stabilizer, and 15 parts of talcum powder.

[0095] Performance Test:

[0096] UV aging: tested according to GB / T 16422.3-2014.

[0097] Water vapor transmission rate: Water vapor transmission rate is tested according to GB / T21529 standard.

[0098] Hot and cold cycle: Tested in accordance with IEC 61215-2-2016. Temperature: -40~85℃; Number of cycles: 100.

[0099] Surface hardness: tested in accordance with GB / T 6739-2006.

[0100] Performance test results:

[0101] Table 1 shows the performance test results of the waterproof membranes prepared in Example 1 and the comparative example.

[0102] Table 1

[0103]

Claims

1. An environmentally friendly weather-resistant PVC waterproof membrane, characterized in that: It includes a high weather-resistant PVDF layer, a bonding layer and a soft PVC layer; The thickness of the high weather-resistant PVDF layer is 30 μm; the thickness of the adhesive layer is 45 μm; the thickness of the soft PVC layer is 125 μm; The high weather-resistant PVDF comprises, by weight, 60 parts of PVDF resin, 20 parts of filler, 10 parts of ACR impact modifier, 7 parts of compatibilizer, 2 parts of antioxidant, and 2 parts of UV absorber; The melt index of the PVDF resin at 230°C and 5.0kg is 26.4 g / 10min, model: HEVER-201; The filler is titanium dioxide, model: TR-28; The UV absorber is a benzotriazole compound, model: UV-P; The ACR impact modifier is a core-shell structured acrylic ester impact modifier, model: 2311; The compatibilizer is ethylene methyl acrylate copolymer; the melt index of the ethylene methyl acrylate copolymer at 190° C. and 2.16 kg is 8 g / 10min, model: AC1820; The bonding layer is a modified material of acrylic resin and methacrylic resin, and the raw materials include, by weight: 30 parts of polymethacrylic resin, 65 parts of acrylic resin, 1 part of antioxidant, 1 part of hydrolysis resistance agent, and 1 part of ultraviolet absorber; The weight average molecular weight of the polymethacrylic acid resin is M W =103000; the viscosity of the polymethacrylic acid resin is 260 Cp, 23°C, model: IF850B; The acrylic resin model: WSD-1722; The anti-hydrolysis agent is polycarbodiimide, model: UN-03; The antioxidant is a mixture of antioxidant 1010 and antioxidant 168; The weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:1; the ultraviolet absorber is a benzophenone compound, model: UV-531; The soft PVC layer comprises, by weight, 65 parts of PVC resin powder, 40 parts of plasticizer, 4 parts of calcium-zinc composite stabilizer, and 12 parts of talcum powder; PVC resin powder, model: DN433; The plasticizer is dioctyl phthalate; The average particle size of talc is 2000 mesh; The preparation method of the PVC waterproof coiled material comprises the following steps: (1) A blended layer of a high weather-resistant PVDF layer and a bonding layer is prepared by co-extrusion of a casting device; (2) A single-layer casting is performed through a casting device to obtain a soft PVC layer; (3) The high weather-resistant PVDF layer and the bonding layer blended layer in step (1) and the soft PVC layer in step (2) are hot-pressed by a laminating machine at a temperature of 140° C. to obtain an environmentally friendly weather-resistant PVC waterproof membrane.

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