Macromolecular pre-paved waterproof coiled material and preparation method thereof

Abstract

The invention provides a high-molecular pre-laid waterproof roll which comprises a main body sheet layer and a high-molecular coating which are sequentially stacked, and no adhesive layer is arranged between the main body sheet layer and the high-molecular coating; the main material of the main body sheet layer is thermoplastic polyolefin; the main material of the polymer coating is room temperature self-crosslinking acrylate. The invention provides a preparation method of the high-molecular pre-paved waterproof coiled material. The high-molecular pre-laid waterproof coiled material is not provided with a hot-melt pressure-sensitive adhesive layer, can be bonded with post-poured concrete, is high in bonding strength, and maintains good welding performance through modification of the main body sheet layer; compared with a waterproof coiled material with a hot-melt pressure-sensitive adhesive layer, the adhesive-free high-molecular pre-laid waterproof coiled material disclosed by the invention has the advantages that the puncture-resistant strength is higher, and the tensile force and the elongation after thermal aging are kept better.

Description

Technical Field

[0001] The invention relates to a polymer pre-laid waterproof coiled material and a preparation method thereof. Background Art

[0002] TPO (thermoplastic polyolefin) pre-laid waterproofing membrane has many significant advantages: 1) In terms of construction convenience, it has good weldability. Through professional welding equipment, it can achieve a firm and tight connection between the membranes to form a seamless waterproof whole, greatly improving the reliability of the waterproofing system and effectively avoiding the leakage risks that may occur in traditional overlap methods; 2) In terms of material properties, its texture is soft, which enables it to easily adapt to various complex base surfaces, whether flat or curved, and can fit tightly, enhancing the adhesion to the base and ensuring the durability of the waterproof effect. This soft feature also makes the membrane easier to operate during transportation and construction, reducing construction obstacles caused by the difficulty of bending rigid materials, and laying the foundation for the efficient completion of waterproofing projects.

[0003] However, thermoplastic polyolefin pre-laid waterproofing membranes using hot melt pressure sensitive adhesive as the adhesive layer have the following defects: 1) In the field of polymer waterproofing membranes, when the membrane has a hot melt pressure sensitive adhesive layer, some problems that need to be solved urgently arise. Compared with the main sheet, the heat resistance of the hot melt pressure sensitive adhesive layer is poor. During the construction process, it is very easy to leak glue because it cannot withstand high temperatures, which seriously affects the construction quality and waterproofing effect; 2) The plasticizer of the hot melt pressure sensitive adhesive layer will gradually migrate to the main sheet during long-term use. This migration behavior will not only cause the overall mechanical properties of the membrane to deteriorate after thermal aging, but also reduce the tensile and elongation retention rate of the membrane, greatly shortening the service life and reliability of the membrane. At the same time, experiments have shown that the adhesive surface of the pre-laid membrane coated with hot melt pressure sensitive adhesive weakens the puncture resistance of the main polyolefin material. In view of this, the development of a glue-free polymer pre-laid waterproofing membrane has become an urgent need in the current industry. Summary of the Invention

[0004] In order to solve the defects of the prior art, the present invention provides a polymer pre-laid waterproof roll, which includes a main sheet layer and a polymer coating stacked in sequence, and no adhesive layer (such as a hot-melt pressure-sensitive adhesive layer) is arranged between the main sheet layer and the polymer coating; the main material of the main sheet layer is thermoplastic polyolefin; the main material of the polymer coating is room temperature self-crosslinking acrylate.

[0005] Preferably, the raw material formula of the main sheet layer includes, by mass, 20-30 parts of polypropylene, 30-50 parts of thermoplastic polyolefin elastomer, 5-15 parts of ethylene acrylic acid copolymer resin, 5-15 parts of filler, and 0.1-1 part of additive A.

[0006] Preferably, the filler is calcium carbonate; and the auxiliary agent A is antioxidant 1010.

[0007] Preferably, the raw material formula of the polymer coating comprises, by mass, 40 to 50 parts of room temperature self-crosslinking acrylic resin emulsion, 10 to 15 parts of powder, 1 to 10 parts of auxiliary agent B, and 25 to 30 parts of water.

[0008] Preferably, the powder is heavy calcium powder; the auxiliary agent B includes a dispersant, a defoaming agent, an antioxidant 1010, and an ultraviolet absorber 329.

[0009] Preferably, the thickness of the main sheet layer is 0.5 to 2.0 mm.

[0010] Preferably, the thickness of the polymer coating is 0.1 mm.

[0011] Preferably, the long sides of the main sheet layer have welding edges.

[0012] Preferably, the width of the welding edge is 70-80 mm.

[0013] The present invention also provides a method for preparing the above-mentioned polymer pre-laid waterproofing membrane, comprising the following steps:

[0014] 1) Preparation of main sheet layer:

[0015] Add the weighed polypropylene, thermoplastic polyolefin elastomer, and ethylene acrylic acid copolymer resin into a high-speed mixer, mix them at a low speed for a certain time to make the components preliminarily dispersed, and then mix them at a high speed for a certain time to obtain a dry mix;

[0016] The mixed dry mix is added to the main feeding hopper of the extruder, and the weighed filler and additive A are added to the side feeding hopper of the extruder. The temperature of the feeding section of the extruder is set to 180-200°C, the temperature of the plasticizing section is set to 200-220°C, and the temperature of the homogenizing section is set to 220-230°C. Under the push of the extruder screw, the material is melted and plasticized, and then extruded through a T-type die to form a sheet blank. The sheet blank extruded from the T-type die enters a three-roll calendering device, and the temperature and pressure of the three rollers are adjusted. The temperature of the upper roller is controlled at 50-60°C, the temperature of the middle roller is controlled at 40-50°C, and the temperature of the lower roller is controlled at 30-40°C. The three-roll calendering device makes the surface of the sheet smooth and uniform in thickness. The calendered sheet is cooled to room temperature by water cooling to shape the sheet to obtain the main sheet layer.

[0017] 2) Preparation of polymer coating:

[0018] The weighed room temperature self-crosslinking acrylic resin emulsion, powder, additive B and water were added to the reactor, stirred for a certain time, and then ammonia water was added to adjust the pH value to 7-8, and stirred for a certain time to obtain a polymer coating slurry;

[0019] The polymer coating slurry is coated on the main sheet layer, dried and rolled to obtain the polymer coating.

[0020] The advantages and beneficial effects of the present invention are:

[0021] The present invention provides a polymer pre-laid waterproof membrane and a preparation method thereof. The polymer pre-laid waterproof membrane of the present invention does not have an adhesive layer (no hot-melt pressure-sensitive adhesive layer), can be bonded to post-cast concrete, has high bonding strength, and maintains good welding performance through modification of the main sheet layer; compared with waterproof membranes with hot-melt pressure-sensitive adhesive layers, the glue-free polymer pre-laid waterproof membrane of the present invention has greater puncture resistance, and maintains good tension and elongation after thermal aging.

[0022] The polymer pre-laid waterproof membrane of the present invention has welding edges on the long sides of the main sheet layer, which can be welded by hot air; and concrete can be directly poured on the polymer coating to achieve effective bonding between the waterproof membrane and concrete through hydration reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the polymer pre-laid waterproof membrane of the present invention. DETAILED DESCRIPTION

[0024] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0025] like Figure 1 As shown, the present invention provides a polymer pre-laid waterproofing membrane, comprising a main sheet layer and a polymer coating layer stacked in sequence, and no adhesive layer (such as a hot-melt pressure-sensitive adhesive layer) is provided between the main sheet layer and the polymer coating layer; the thickness of the main sheet layer is 0.5 to 2.0 mm; the thickness of the polymer coating layer is 0.1 mm; the long side of the main sheet layer has a welding edge; the width of the welding edge is 70 to 80 mm;

[0026] The raw material formula of the main sheet layer includes, by mass, 20-30 parts of polypropylene, 30-50 parts of thermoplastic polyolefin elastomer, 5-15 parts of ethylene acrylic acid copolymer resin, 5-15 parts of filler, and 0.1-1 part of additive A; specifically, the filler is calcium carbonate; the additive A is antioxidant 1010;

[0027] The polymer coating raw material formula includes, by mass, 40-50 parts of room temperature self-crosslinking acrylic resin emulsion, 10-15 parts of powder, 1-10 parts of auxiliary agent B, and 25-30 parts of water; specifically, the powder is heavy calcium powder; the auxiliary agent B includes a dispersant, a defoaming agent, an antioxidant 1010, and an ultraviolet absorber 329;

[0028] The polymer pre-laid waterproof membrane is prepared by the following steps:

[0029] 1) Preparation of main sheet layer:

[0030] The weighed polypropylene, thermoplastic polyolefin elastomer, and ethylene acrylic acid copolymer resin are added to a high-speed mixer, first mixed at a low speed (e.g., 300 rpm) for a certain time (e.g., 5 minutes) to make the components preliminarily dispersed evenly, and then mixed at a high speed (e.g., 800 rpm) for a certain time (e.g., 8 minutes) to obtain a dry mix;

[0031] The mixed dry mix is added to the main feeding hopper of the extruder, and the weighed filler and additive A are added to the side feeding hopper of the extruder. The temperature of the feeding section of the extruder is set to 180-200°C, the temperature of the plasticizing section is set to 200-220°C, and the temperature of the homogenizing section is set to 220-230°C. Under the push of the extruder screw, the material is melted and plasticized, and then extruded through a T-type die to form a sheet blank. The sheet blank extruded from the T-type die enters a three-roll calendering device, and the temperature and pressure of the three rollers are adjusted. The temperature of the upper roller is controlled at 50-60°C, the temperature of the middle roller is controlled at 40-50°C, and the temperature of the lower roller is controlled at 30-40°C. The three-roll calendering device makes the surface of the sheet smooth and uniform in thickness. The calendered sheet is cooled to room temperature by water cooling to shape the sheet to obtain the main sheet layer.

[0032] 2) Preparation of polymer coating:

[0033] The weighed room temperature self-crosslinking acrylic resin emulsion, powder, additive B and water are added to the reactor, stirred for a certain time (such as 1 hour), and then ammonia water is added to adjust the pH value to 7-8, and stirred for a certain time to obtain a polymer coating slurry;

[0034] The polymer coating slurry is coated on the main sheet layer, dried and rolled to obtain the polymer coating.

[0035] Specific embodiments of the present invention and comparative examples are as follows:

[0036] Example 1

[0037] Example 1 provides a polymer pre-laid waterproofing membrane, comprising a main sheet layer and a polymer coating layer stacked in sequence, without an adhesive layer (such as a hot-melt pressure-sensitive adhesive layer) disposed between the main sheet layer and the polymer coating layer; the main sheet layer has a thickness of 0.9 mm, and the polymer coating has a thickness of 0.1 mm;

[0038] The raw material formula of the main sheet layer includes, by mass:

[0039] 25 parts of polypropylene,

[0040] 40 parts of thermoplastic polyolefin elastomer,

[0041] 10 parts of ethylene acrylic acid copolymer resin,

[0042] 5 parts of filler,

[0043] 0.2 parts of additive A;

[0044] Wherein, the filler is calcium carbonate; the auxiliary agent A is an antioxidant;

[0045] Specifically, the polypropylene can be K8003 from Sinopec, the thermoplastic polyolefin elastomer can be Vistamaxx 6102 from ExxonMobil, the ethylene acrylic acid copolymer resin can be 3004 from Aiskaizhi, the filler can be calcium carbonate 2T from Omya, and the additive A can be antioxidant 1010 from BASF.

[0046] The raw material formula of the polymer coating includes, by mass:

[0047] 50 parts of room temperature self-crosslinking acrylic resin emulsion,

[0048] 10 parts of powder,

[0049] 2.6 parts of auxiliary agent B,

[0050] 30 parts water;

[0051] Among them, the powder is heavy calcium powder; the additive B includes: 1 part of dispersant, 1 part of defoamer, 10100.3 parts of antioxidant, and 3290.3 parts of ultraviolet absorber;

[0052] The polymer pre-laid waterproof membrane provided in Example 1 is prepared by the following steps:

[0053] 1) Preparation of main sheet layer:

[0054] The weighed polypropylene, thermoplastic polyolefin elastomer, and ethylene acrylic acid copolymer resin are added to a high-speed mixer, first mixed at a low speed (e.g., 300 rpm) for a certain time (e.g., 5 minutes) to make the components preliminarily dispersed evenly, and then mixed at a high speed (e.g., 800 rpm) for a certain time (e.g., 8 minutes) to obtain a dry mix;

[0055] The mixed dry mix is added to the main feeding hopper of the extruder, and the weighed filler and additive A are added to the side feeding hopper of the extruder. The temperature of the feeding section of the extruder is set to 180-200°C, the temperature of the plasticizing section is set to 200-220°C, and the temperature of the homogenizing section is set to 220-230°C. Under the push of the extruder screw, the material is melted and plasticized, and then extruded through a T-type die to form a sheet blank. The sheet blank extruded from the T-type die enters a three-roll calendering device, and the temperature and pressure of the three rollers are adjusted. The temperature of the upper roller is controlled at 50-60°C, the temperature of the middle roller is controlled at 40-50°C, and the temperature of the lower roller is controlled at 30-40°C. The three-roll calendering device makes the surface of the sheet smooth and uniform in thickness. The calendered sheet is cooled to room temperature by water cooling to shape the sheet to obtain the main sheet layer.

[0056] 2) Preparation of polymer coating:

[0057] The weighed room temperature self-crosslinking acrylic resin emulsion, powder, additive B, and water were added to the reactor, stirred in a certain order for a certain time (e.g., 1 hour), and then ammonia water was added to adjust the pH value to 7-8, and stirred for another 20 minutes to obtain a polymer coating slurry;

[0058] The polymer coating slurry is coated on the main sheet layer, dried at 65° C. and rolled to obtain the polymer coating.

[0059] Example 2

[0060] Example 2 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0061] The raw material formula of the main sheet layer includes, by mass:

[0062] 20 parts of polypropylene,

[0063] 50 parts of thermoplastic polyolefin elastomer,

[0064] 5 parts of ethylene acrylic acid copolymer resin,

[0065] 5 parts of filler,

[0066] Auxiliary agent A 0.2 parts.

[0067] Example 3

[0068] Example 3 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0069] The raw material formula of the main sheet layer includes, by mass:

[0070] 30 parts of polypropylene,

[0071] 50 parts of thermoplastic polyolefin elastomer,

[0072] 15 parts of ethylene acrylic acid copolymer resin,

[0073] 5 parts of filler,

[0074] Auxiliary agent A 0.2 parts.

[0075] Comparative Example 1

[0076] Comparative Example 1 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0077] The raw material formula of the main sheet layer includes, by mass:

[0078] 30 parts of polypropylene,

[0079] 50 parts of thermoplastic polyolefin elastomer,

[0080] 2 parts of ethylene acrylic acid copolymer resin,

[0081] 5 parts of filler,

[0082] Auxiliary agent A 0.2 parts.

[0083] Comparative Example 2

[0084] Comparative Example 2 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0085] The raw material formula of the main sheet layer includes, by mass:

[0086] 30 parts of polypropylene,

[0087] 40 parts of thermoplastic polyolefin elastomer,

[0088] 20 parts of ethylene acrylic acid copolymer resin,

[0089] 5 parts of filler,

[0090] Auxiliary agent A 0.2 parts.

[0091] Comparative Example 3

[0092] Comparative Example 3 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0093] The raw material formula of the main sheet layer includes, by mass:

[0094] 30 parts of polypropylene,

[0095] 50 parts of thermoplastic polyolefin elastomer,

[0096] Ethylene acrylic acid copolymer resin 0 parts,

[0097] 15 parts of filler,

[0098] Auxiliary agent A 0.2 parts.

[0099] Comparative Example 4

[0100] Comparative Example 4 provides a polymer pre-laid waterproof membrane, which is different from Example 1 in that:

[0101] A hot melt pressure sensitive adhesive layer is further provided between the main sheet layer and the polymer coating (i.e., the polymer pre-laid waterproof roll provided in Comparative Example 4 includes a main sheet layer, a hot melt pressure sensitive adhesive layer and a polymer coating layer stacked in sequence); the thickness of the hot melt pressure sensitive adhesive layer is 0.3 mm;

[0102] The raw material formula of the hot melt pressure sensitive adhesive layer includes, by parts by mass:

[0103] 40 parts of styrene-isoprene-styrene block copolymer,

[0104] 30 parts of tackifying resin,

[0105] 30 parts of naphthenic oil,

[0106] 0.3 parts of antioxidant;

[0107] The polymer pre-laid waterproof membrane provided in Comparative Example 4 is prepared by the following steps:

[0108] 1) Preparation of main sheet layer:

[0109] The preparation method of the main sheet layer is the same as that of Example 1;

[0110] 2) Preparation of hot melt pressure sensitive adhesive layer:

[0111] The weighed styrene-isoprene-styrene block copolymer, tackifying resin, naphthenic oil and antioxidant were added into a reaction kettle and stirred at 180° C. for 1 hour to prepare a rubber compound;

[0112] Applying adhesive on the main sheet layer to obtain a hot melt pressure sensitive adhesive layer;

[0113] 3) Preparation of polymer coating:

[0114] The weighed room temperature self-crosslinking acrylic resin emulsion, powder, additive B and water were added to the reactor, stirred for a certain time, and then ammonia water was added to adjust the pH value to 7-8, and stirred for a certain time to obtain a polymer coating slurry;

[0115] The polymer coating slurry is coated on the hot melt pressure sensitive adhesive layer, dried at 65° C. and rolled to obtain the polymer coating.

[0116] Examples 1 to 3 and Comparative Examples 1 to 4 were tested (test method refers to GB / T23457-2017 pre-laid waterproof membrane), and the test results are shown in the following table:

[0117]

[0118] It can be seen from the above table that the polymer waterproof membrane provided in Examples 1 to 3, although without a hot-melt pressure-sensitive adhesive layer, can be bonded to the post-cast concrete with a high bonding strength, and maintains good welding performance through modification of the main sheet layer; compared with the waterproof membrane with a hot-melt pressure-sensitive adhesive layer, the glue-free polymer pre-laid waterproof membrane of the present invention has greater puncture resistance, and maintains better tensile strength and elongation after thermal aging.

[0119] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A polymer pre-laid waterproof roll, characterized in that: It comprises a main sheet layer and a polymer coating layer stacked in sequence, and no adhesive layer is arranged between the main sheet layer and the polymer coating layer; the main material of the main sheet layer is thermoplastic polyolefin; the main material of the polymer coating layer is room temperature self-crosslinking acrylate.

2. The polymer pre-laid waterproofing membrane according to claim 1, characterized in that: The raw material formula of the main sheet layer includes, by mass, 20-30 parts of polypropylene, 30-50 parts of thermoplastic polyolefin elastomer, 5-15 parts of ethylene acrylic acid copolymer resin, 5-15 parts of filler, and 0.1-1 part of auxiliary agent A.

3. The polymer pre-laid waterproof membrane according to claim 2, characterized in that: The filler is calcium carbonate; the auxiliary agent A is antioxidant 1010.

4. The polymer pre-laid waterproofing membrane according to claim 1, characterized in that: The raw material formula of the polymer coating comprises, by mass, 40 to 50 parts of room temperature self-crosslinking acrylic resin emulsion, 10 to 15 parts of powder, 1 to 10 parts of auxiliary agent B, and 25 to 30 parts of water.

5. The polymer pre-laid waterproof membrane according to claim 4, characterized in that: The powder is heavy calcium powder; the auxiliary agent B includes a dispersant, a defoaming agent, an antioxidant 1010, and an ultraviolet absorber 329.

6. The polymer pre-laid waterproofing membrane according to claim 1, characterized in that: The thickness of the main sheet layer is 0.5 to 2.0 mm.

7. The polymer pre-laid waterproofing membrane according to claim 1, characterized in that: The thickness of the polymer coating is 0.1 mm.

8. The polymer pre-laid waterproofing membrane according to claim 1, characterized in that: The long sides of the main sheet layer are left with welding edges.

9. The polymer pre-laid waterproofing membrane according to claim 8, characterized in that: The width of the welding edge is 70 to 80 mm.

10. The method for preparing the polymer pre-laid waterproofing membrane according to any one of claims 1 to 9, characterized in that: The steps include: 1) Preparation of the main sheet layer: Add the weighed polypropylene, thermoplastic polyolefin elastomer, and ethylene acrylic acid copolymer resin into a high-speed mixer, mix them at a low speed for a certain time to make the components preliminarily dispersed, and then mix them at a high speed for a certain time to obtain a dry mix; The mixed dry mix is added to the main feeding hopper of the extruder, and the weighed filler and additive A are added to the side feeding hopper of the extruder. The temperature of the feeding section of the extruder is set to 180-200°C, the temperature of the plasticizing section is set to 200-220°C, and the temperature of the homogenizing section is set to 220-230°C. Under the push of the extruder screw, the material is melted and plasticized, and then extruded through a T-type die to form a sheet blank. The sheet blank extruded from the T-type die enters a three-roll calendering device, and the temperature and pressure of the three rollers are adjusted. The temperature of the upper roller is controlled at 50-60°C, the temperature of the middle roller is controlled at 40-50°C, and the temperature of the lower roller is controlled at 30-40°C. The three-roll calendering device makes the surface of the sheet smooth and uniform in thickness. The calendered sheet is cooled to room temperature by water cooling to shape the sheet to obtain the main sheet layer. 2) Preparation of polymer coating: The weighed room temperature self-crosslinking acrylic resin emulsion, powder, additive B and water were added to the reactor, stirred for a certain time, and then ammonia water was added to adjust the pH value to 7-8, and stirred for a certain time to obtain a polymer coating slurry; The polymer coating slurry is coated on the main sheet layer, dried and rolled to obtain the polymer coating.

Images