Polymer polypropylene fiber waterproof coiled material and preparation method thereof

Abstract

The invention belongs to the technical field of building materials, and discloses a polymer polypropylene fiber waterproof coiled material and a preparation method thereof. The polymer polypropylene fiber waterproof coiled material comprises the following raw materials: matrix asphalt, tackifying resin, SBS, an acrylic copolymer, an additive, a filler, PET fibers and a root inhibitor. Wherein the additives comprise pyromellitic dianhydride and triglycidyl isocyanurate. Different additives are compounded, meanwhile, the acrylic copolymer, the inorganic filler and the PET fiber are added and interact with the asphalt, so that a uniform and stable net-shaped structure is formed, and the prepared modified asphalt layer is high in impact resistance and weather resistance; according to the invention, sodium polyacrylate and ceramsite are compounded in the polyethylene layer, so that the waterproofness of the high-molecular polypropylene fiber waterproof coiled material is further improved. The high-molecular polypropylene fiber waterproof coiled material prepared in the application is relatively good in waterproof performance, impact resistance and mechanical property, and also has relatively good puncture resistance.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a polymer polypropylene waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproofing membrane is mainly used in building walls, roofs, tunnels, roads, landfills, etc. It is a kind of flexible building material product that can be rolled into a roll to resist the leakage of rainwater and groundwater from the outside. As a leak-free connection between the engineering foundation and the building, it is the first barrier to waterproofing the entire project and plays a vital role in the entire project. At present, the most common polymer synthetic waterproofing membrane is polyethylene polypropylene composite waterproofing membrane. Polypropylene is also called polypropylene fiber. It refers to synthetic fiber isotactic polypropylene fiber made from propylene, a by-product of petroleum refining, and has a high waterproof effect. Waterproofing membranes are required to have good water resistance, stability to temperature changes (no flow, no bubbling, no turbulence at high temperatures; no brittle cracking at low temperatures), certain mechanical strength, elongation and fracture resistance, and also certain flexibility and aging resistance. In the prior art, polypropylene composite waterproofing membranes are usually composited with a polyethylene sheet in the middle and polypropylene non-woven fabrics on both sides. The resulting waterproofing membranes have low strength, poor weather resistance, and a short service life. Moreover, when used in underground waterproofing projects, they are easily punctured by stones in the concrete in the protective layer above the waterproofing membranes, thereby losing the performance that the waterproofing membranes should have. Summary of the invention

[0003] In order to solve the above technical problems, a waterproof roll material with good waterproof performance, impact resistance, and mechanical properties as well as scratch resistance and root penetration resistance is developed. The present application provides a polymer polypropylene waterproof roll material and a preparation method thereof.

[0004] In the first aspect, the present application provides a high molecular weight polypropylene waterproof roll material, which includes, from top to bottom, a first polypropylene non-woven fabric layer, a modified asphalt layer, a metal tire base layer, a polyethylene layer and a second polypropylene non-woven fabric layer; the modified asphalt layer includes the following raw materials in parts by weight: 70-120 parts of base asphalt, 4-6 parts of tackifying resin, 6-10 parts of SBS, 8-14 parts of acrylic copolymer, 2-4 parts of additives, 11-18 parts of fillers, 2-5 parts of PET fibers, and 2-3 parts of root inhibitors; the additives include pyromellitic dianhydride and triglycidyl isocyanurate.

[0005] Furthermore, the additive comprises pyromellitic dianhydride and triglycidyl isocyanurate in a weight ratio of 1:1-2.

[0006] By adopting the above technical scheme, the additives are selected from pyromellitic dianhydride and triglycidyl isocyanurate. The pyromellitic dianhydride containing a multifunctional acid anhydride structure reacts with active groups such as hydroxyl and carboxyl in asphalt, and the triglycidyl isocyanurate containing a multifunctional isocyanate group reacts with active groups such as hydroxyl and carboxyl in asphalt, thereby forming a stable network matrix structure, reducing the flocculation of macromolecules in asphalt, or opening the asphalt clusters originally stacked together, reducing the degree of agglomeration of asphalt, and increasing the dispersion of asphalt, thereby increasing the stability and high temperature resistance of the modified asphalt; the asphalt matrix structure with a network structure allows the inorganic filler to be evenly dispersed therein, which can effectively improve the overall impact resistance of the modified asphalt layer; secondly, the additive can also react with the terminal hydroxyl or terminal carboxyl of the molecular chain of the PET fiber, thereby promoting cross-linking between the asphalt and the PET fiber, and between the PET fibers to form more branched structures, thereby improving the overall strength of the modified asphalt layer.

[0007] Furthermore, the filler comprises talc powder and modified wollastonite in a weight ratio of 1:3-6.

[0008] Furthermore, the preparation method of the modified wollastonite includes the following steps: preparing a suspension of wollastonite in a solvent, adding eleostearic acid, heating to 70-80°C, ultrasonicating, filtering to obtain the residue, washing, and drying to obtain the modified wollastonite, wherein the weight ratio of the wollastonite to eleostearic acid is 10-15:1.

[0009] By adopting the above technical scheme, talcum powder with smaller particle size in the filler can be used as a nucleating agent during the melting process of asphalt, promoting the uniform dispersion of large bubbles in the gaps of asphalt into a large number of small bubbles with small volume, thereby increasing the dispersion and stability of asphalt; Wollastonite is a needle-shaped silicate material with good mechanical properties and fire resistance. Using eleostearic acid as a surface modifier to modify wollastonite can prevent the local agglomeration of wollastonite powder in the asphalt matrix material, and can also improve the poor bonding between the needle-shaped structure of wollastonite and the asphalt matrix, and the appearance of a large number of holes and gaps around the powder and on the matrix, thereby improving the compatibility between wollastonite and the asphalt matrix material.

[0010] Further, the acrylic copolymer includes one or more of methyl acrylate-acrylic acid copolymer, methyl methacrylate-acrylic acid copolymer, ethyl acrylate-acrylic acid copolymer, hydroxyethyl acrylate-acrylic acid copolymer, hydroxypropyl acrylate-acrylic acid copolymer, n-butyl acrylate-acrylic acid copolymer, isooctyl acrylate-acrylic acid copolymer and glycidyl methacrylate-acrylic acid copolymer.

[0011] By adopting the above technical solution, the acrylic copolymer as a polar adhesive substance can promote the adhesion between the asphalt layer and the metal foil of the tire base layer. The side chain carboxyl group of the acrylic polymer reacts with the polar group on the surface of the metal foil, thereby further improving the adhesion between the tire base layer and the modified asphalt layer.

[0012] Furthermore, the PET fibers are PET fibers obtained by blowing recycled PET films, PET textiles, and PET bottles; and the length of the PET fibers is 3-25 mm.

[0013] Furthermore, the tackifying resin includes one or more of C5 petroleum resin, C9 petroleum resin, terpene resin, rosin resin and coumarone resin.

[0014] Furthermore, the polyethylene layer comprises the following raw materials in parts by weight: 80-130 parts by weight of high-density polyethylene, 30-55 parts by weight of metallocene-catalyzed polyethylene, 12-18 parts by weight of thermoplastic elastomer, 0.5-1 part of initiator, 3-6 parts of ceramsite, 5-11 parts of sodium polyacrylate, and 2-3 parts of root inhibitor.

[0015] By adopting the above technical scheme, the polyethylene layer is mainly used as a waterproof functional layer to prevent groundwater from corroding the foundation; sodium polyacrylate and ceramsite are compounded in the polyethylene layer. Sodium polyacrylate is a water-absorbent resin, and ceramsite also has strong water absorption. When cracks appear in the polyethylene layer due to aging, the infiltrated water can be promptly absorbed by the sodium polyacrylate and ceramsite dispersed in the polyethylene layer. After absorbing water, the volume of the two expands, thereby sealing the cracks in time and inhibiting water intrusion.

[0016] Furthermore, the tire base layer is copper foil or aluminum foil, and the thickness of the tire base layer is 0.04-0.1 mm.

[0017] Furthermore, the thickness of the modified asphalt layer is 3-8 mm, and the thickness of the polyethylene layer is 3-5 mm.

[0018] In a second aspect, the present application provides a method for preparing the above-mentioned polymer polypropylene waterproof membrane, comprising the following steps: S1, melt-blending high-density polyethylene, metallocene-catalyzed polyethylene, thermoplastic elastomer, initiator, ceramsite, sodium polyacrylate and root inhibitor, and extruding and shaping on one surface of the tire base layer to form a polyethylene layer; S2, heating the asphalt base material until it is melted, controlling the temperature at 140-160° C., adding SBS and acrylic copolymer, waiting for the SBS to swell, adding tackifying resin, waiting for it to dissolve, adding the remaining raw materials, stirring for 1-3 hours, and extruding and shaping on the other surface of the tire base layer treated in step S1 to form a modified asphalt layer, thereby obtaining a pre-composite layer; S3, pressurizing the first polypropylene non-woven fabric layer, the second polypropylene non-woven fabric layer and the pre-composite layer prepared in step S2 through a drafting roller and performing hot pressing composite, so as to prepare a high molecular weight polypropylene waterproof coiled material.

[0019] In summary, the present invention includes at least one of the following beneficial technical effects: 1. In this application, by adding special additives, acrylic copolymers, inorganic fillers and PET fibers to the modified asphalt layer of the high molecular weight polypropylene waterproofing coiled material, the modified asphalt layer has strong impact resistance, high weather resistance and strong bonding with the metal base layer by interacting with asphalt, and the waterproofness of the polyethylene layer is further improved by compounding sodium polyacrylate and ceramsite in the polyethylene layer of the high molecular weight polypropylene waterproofing coiled material. The high molecular weight polypropylene waterproofing coiled material prepared in this application has good waterproof performance, impact resistance and mechanical properties, and also has good puncture resistance.

[0020] 2. The preparation process of the polymer polypropylene waterproof membrane in this application is simple, the raw material price is low, and it is suitable for large-scale production and application. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the embodiments.

[0022] The present application designs a high molecular weight polypropylene waterproofing coiled material, which includes, from top to bottom, a first polypropylene non-woven fabric layer, a modified asphalt layer, a metal base layer, a polyethylene layer, and a second polypropylene non-woven fabric layer; the modified asphalt layer includes the following raw materials in parts by weight: 70-120 parts of base asphalt, 4-6 parts of tackifying resin, 6-10 parts of SBS, 8-14 parts of acrylic copolymer, 2-4 parts of additives, 11-18 parts of fillers, 2-5 parts of PET fibers, and 2-3 parts of root inhibitors. The additives include pyromellitic anhydride and triglycidyl isocyanurate.

[0023] The polymer polypropylene waterproof coiled material of the present application is prepared by the following method, including the following steps: S1, melt-blending high-density polyethylene, metallocene-catalyzed polyethylene, thermoplastic elastomer, initiator, ceramsite, sodium polyacrylate and root inhibitor, and extruding and shaping on one surface of the tire base layer to form a polyethylene layer; S2, heating the asphalt base material until it is melted, controlling the temperature at 140-160° C., adding SBS and acrylic copolymer, waiting for the SBS to swell, adding tackifying resin, waiting for it to dissolve, adding the remaining raw materials, stirring for 1-3 hours, and extruding and shaping on the other surface of the tire base layer treated in step S1 to form a modified asphalt layer, thereby obtaining a pre-composite layer; S3, pressurizing the first polypropylene non-woven fabric layer, the second polypropylene non-woven fabric layer and the pre-composite layer prepared in step S2 through a drafting roller and performing hot pressing composite, so as to prepare a high molecular weight polypropylene waterproof coiled material.

[0024] The technical problem solved by the present application is that the polypropylene composite waterproofing roll in the prior art is usually composed of a sheet of polyethylene in the middle and polypropylene non-woven fabrics on both sides. The obtained waterproofing roll has low strength, poor weather resistance, short service life, and is easily punctured by stones in the concrete in the protective layer above the waterproofing roll when used in underground waterproofing projects, thereby losing the performance that the waterproofing roll should have. In the present application, special additives, acrylic copolymers, inorganic fillers and PET fibers are added to the modified asphalt layer of the polymer polypropylene waterproofing roll, which interact with the asphalt to form a uniform and stable mesh structure. The prepared modified asphalt layer has strong impact resistance, high weather resistance, and strong bonding with the metal base layer; in the present application, sodium polyacrylate and ceramsite are compounded in the polyethylene layer of the polymer polypropylene waterproofing roll to further improve the waterproofness of the polyethylene layer. The polymer polypropylene waterproofing roll prepared in the present application has good waterproofing performance, impact resistance, and mechanical properties, and is also resistant to stone scratches and root punctures.

[0025] Preparation Example 1-5 Preparation Examples 1-5 are modified asphalt layers with different raw material ratios, and the specific raw material ratios are shown in Table 1 (unit: parts by weight).

[0026] Table 1 The base asphalt is a mixture of 90# petroleum asphalt and 200# petroleum asphalt in a weight ratio of 3:1. The softening point of 90# petroleum asphalt is 40-60℃, and the 0.1mm needle penetration is 80-100, which is the medium fuel oil 90# heavy traffic road petroleum asphalt; 200# asphalt, the 0.1mm needle penetration is 180-220, which is the medium fuel oil 200# petroleum asphalt.

[0027] Among them, SBS adopts SBS61401 from Sinopec.

[0028] The acrylic copolymer uses hydroxyethyl acrylate-acrylic acid copolymer.

[0029] The additive is pyromellitic dianhydride and triglycidyl isocyanurate in a weight ratio of 1:1.

[0030] The filler is a mixture of talcum powder and modified wollastonite in a weight ratio of 1:4, wherein the average particle size of the talcum powder is 50 microns, and the average particle size of the modified wollastonite is 2.5 mm.

[0031] The preparation of modified wollastonite comprises the following steps: Prepare a 10 wt% suspension of wollastonite in water, add eleostearic acid, heat to 80°C, ultrasonicate for 10 minutes, filter out the residue, wash, and dry to obtain modified wollastonite. The weight ratio of wollastonite to eleostearic acid is 10:1.

[0032] The average length of PET fiber is controlled at 20 mm.

[0033] The tackifying resin is C9 petroleum resin.

[0034] The root inhibitor is made of copper oxide powder with an average particle size of about 5 microns.

[0035] Preparation Example 6 Preparation Example 6 is based on Preparation Example 2, except that in Preparation Example 6, talc is replaced with silicon dioxide of the same particle size.

[0036] Preparation Example 7 Preparation Example 7 is based on Preparation Example 2, except that in Preparation Example 7, wollastonite is not modified and wollastonite of the same particle size is used.

[0037] Preparation Example 8-9 Preparation Examples 8-9 are polyethylene layers with different raw material ratios.

[0038] The polyethylene layer in Preparation Example 8 includes the following raw materials in parts by weight: 120 parts of high-density polyethylene, 35 parts of metallocene-catalyzed polyethylene, 16 parts of thermoplastic elastomer, 1 part of initiator, 4 parts of ceramsite, 8 parts of sodium polyacrylate, and 2 parts of root inhibitor.

[0039] The high-density polyethylene used is CNOOC Shell 5121B, with a melt index of 0.5g / 10min.

[0040] The metallocene-catalyzed polyethylene used was Exxon 2703HH, with a melt index of 2.0 g / 10 min.

[0041] The thermoplastic elastomer adopts thermoplastic polyurethane elastomer (TPU), and WHT-1495EC TPU produced by Wanhua Chemical is adopted.

[0042] The initiator used was dicumyl peroxide.

[0043] The root inhibitor is made of copper oxide powder with an average particle size of about 5 microns.

[0044] Preparation Example 9 is based on Preparation Example 8, except that no sodium polyacrylate is added in Preparation Example 9.

[0045] Examples 1-8 Examples 1-8 are high molecular weight polypropylene waterproofing membranes made of different modified asphalt layers or polyethylene layers, and the difference lies in the different modified asphalt layers or polyethylene layers used. See Table 2 for details.

[0046] Table 2 The tire base layer in Example 1-8 is made of copper foil with a thickness of about 0.08 mm.

[0047] The thickness of the modified asphalt layer in Examples 1-8 was controlled to be 6 mm, the thickness of the polyethylene layer was controlled to be 3.5 mm, and the thickness of the first polypropylene non-woven fabric layer and the second polypropylene non-woven fabric layer was controlled to be 1.5 mm.

[0048] The preparation process of Examples 1-8 comprises the following steps: S1, melt-blending high-density polyethylene, metallocene-catalyzed polyethylene, thermoplastic elastomer, initiator, ceramsite, sodium polyacrylate and root inhibitor at 160° C., and extruding and shaping on one surface of the tire base layer to form a polyethylene layer; S2, heating the asphalt base material until it is melted, controlling the temperature at 150°C, adding SBS and acrylic copolymer, waiting for the SBS to swell, adding tackifying resin, waiting for it to dissolve, adding the remaining raw materials, stirring for 1.5 hours, and extruding and shaping on the other surface of the tire base layer treated in step S1 to form a modified asphalt layer, thereby obtaining a pre-composite layer; S3, pressurizing the first polypropylene non-woven fabric layer, the second polypropylene non-woven fabric layer and the pre-composite layer prepared in step S2 through a drafting roller and performing hot pressing composite, so as to prepare a high molecular weight polypropylene waterproof coiled material.

[0049] Comparative Example 1 Comparative Example 1 is based on Example 2, with the difference that: in the additives in the raw materials of the modified asphalt layer in the high molecular weight polypropylene waterproof membrane in Comparative Example 1, only pyromellitic anhydride is added.

[0050] Comparative Example 2 Comparative Example 2 is based on Example 2, with the difference that: PET fiber is not added to the raw materials of the modified asphalt layer in the high molecular weight polypropylene waterproof membrane in Comparative Example 2.

[0051] Performance Testing 1. The impact strength of the high molecular weight polypropylene waterproof membranes prepared in Examples 1-8 and Comparative Examples 1-2 was determined with reference to Standard GB / T1843-2008.

[0052] 2. The puncture strength of the high molecular weight polypropylene waterproof membrane prepared in Examples 1-8 and Comparative Examples 1-2 was determined with reference to the standard GB / T3360.1-2014.

[0053] 3. The yield elongation and yield strength of the high molecular weight polypropylene waterproof membrane prepared in Examples 1-8 and Comparative Examples 1-2 were determined with reference to Standard GB / T528-2009.

[0054] 4. Water-impermeability test: Referring to GB / T35467-2017 "Wet-laid waterproof membrane", the polymer polypropylene waterproof membrane prepared in Examples 1-8 and Comparative Examples 1-2 was first pre-aged to simulate a waterproof membrane with a service life of 30 years. After that, the polymer polypropylene waterproof membrane in Examples 1-8 and Comparative Examples 1-2 was placed in an environment with a water pressure of 0.3 MPa for 120 minutes to observe whether it was water permeable.

[0055] The measurement results are shown in Table 3.

[0056] Table 3 By analyzing the data in Table 3, it can be obtained that the polymer waterproofing membrane provided by the present invention has excellent tensile deformation performance, puncture resistance, impact resistance, weather resistance and good waterproof performance, and is suitable for use as a waterproofing membrane for underground engineering waterproofing. In this application, different additives are compounded in the modified asphalt layer of the polymer polypropylene waterproofing membrane, and acrylic copolymers, inorganic fillers and PET fibers are added to interact with asphalt to form a uniform and stable mesh structure. The prepared modified asphalt layer has strong impact resistance, high weather resistance, and strong bonding with the metal base layer; in this application, sodium polyacrylate and ceramsite are compounded in the polyethylene layer of the polymer polypropylene waterproofing membrane to further improve the waterproofness of the polyethylene layer. The polymer polypropylene waterproofing membrane prepared in this application has good waterproof performance, impact resistance, and mechanical properties, and also has good puncture resistance.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A polymer polypropylene waterproof coiled material, characterized in that: The polymer polypropylene waterproof coiled material comprises, from top to bottom, a first polypropylene non-woven fabric layer, a modified asphalt layer, a metal tread layer, a polyethylene layer and a second polypropylene non-woven fabric layer; The modified asphalt layer comprises the following raw materials in parts by weight: 70-120 parts of base asphalt, 4-6 parts of tackifying resin, 6-10 parts of SBS, 8-14 parts of acrylic copolymer, 2-4 parts of additives, 11-18 parts of fillers, 2-5 parts of PET fibers, and 2-3 parts of root inhibitors; The additives include pyromellitic dianhydride and triglycidyl isocyanurate.

2. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The filler comprises talc powder and modified wollastonite in a weight ratio of 1:3-6.

3. The polymer polypropylene waterproof coiled material according to claim 2, characterized in that: The preparation method of the modified wollastonite comprises the following steps: preparing a suspension of wollastonite in a solvent, adding eleostearic acid, heating to 70-80°C, ultrasonicating, filtering to obtain a residue, washing, and drying to obtain the modified wollastonite, wherein the weight ratio of the wollastonite to the eleostearic acid is 10-15:

1.

4. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The acrylic copolymer includes one or more of methyl acrylate-acrylic acid copolymer, methyl methacrylate-acrylic acid copolymer, ethyl acrylate-acrylic acid copolymer, hydroxyethyl acrylate-acrylic acid copolymer, hydroxypropyl acrylate-acrylic acid copolymer, n-butyl acrylate-acrylic acid copolymer, isooctyl acrylate-acrylic acid copolymer and glycidyl methacrylate-acrylic acid copolymer.

5. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The PET fibers are PET fibers obtained by blowing recycled PET films, PET textiles, and PET bottles; the length of the PET fibers is 3-25 mm.

6. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The tackifying resin includes one or more of C5 petroleum resin, C9 petroleum resin, terpene resin, rosin resin and coumarone resin.

7. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The polyethylene layer comprises the following raw materials in parts by weight: 80-130 parts by weight of high-density polyethylene, 30-55 parts by weight of metallocene-catalyzed polyethylene, 12-18 parts by weight of thermoplastic elastomer, 0.5-1 part of initiator, 3-6 parts of ceramsite, 5-11 parts of sodium polyacrylate and 2-3 parts of root inhibitor.

8. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The tire base layer is copper foil or aluminum foil, and the thickness of the tire base layer is 0.04-0.1 mm.

9. The polymer polypropylene waterproof coiled material according to claim 1, characterized in that: The thickness of the modified asphalt layer is 3-8 mm, and the thickness of the polyethylene layer is 3-5 mm.

10. A method for preparing the polymer polypropylene waterproof coiled material according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, melt-blending high-density polyethylene, metallocene-catalyzed polyethylene, thermoplastic elastomer, initiator, ceramsite, sodium polyacrylate and root inhibitor, and extruding and shaping on one surface of the tire base layer to form a polyethylene layer; S2, heating the asphalt base material until it is melted, controlling the temperature at 140-160° C., adding SBS and acrylic copolymer, waiting for the SBS to swell, adding tackifying resin, waiting for it to dissolve, adding the remaining raw materials, stirring for 1-3 hours, and extruding and shaping on the other surface of the tire base layer treated in step S1 to form a modified asphalt layer, thereby obtaining a pre-composite layer; S3, pressurizing the first polypropylene non-woven fabric layer, the second polypropylene non-woven fabric layer and the pre-composite layer prepared in step S2 through a drafting roller and performing hot pressing composite, so as to prepare a high molecular weight polypropylene waterproof coiled material.

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