Root-resistant asphalt waterproofing membrane and method of making same

Abstract

The application relates to the technical field of waterproof materials, and discloses a root-puncture-resistant asphalt waterproof coiled material and a preparation method thereof. The asphalt waterproof coiled material comprises, from top to bottom, an upper isolation layer, an upper coating layer, a base layer, a lower coating layer and a lower isolation layer. The raw materials of the upper coating layer and the lower coating layer each independently comprise the following components in parts by weight: 90-110 parts of asphalt, 2-24 parts of a styrene-butadiene-styrene copolymer, 4-10 parts of a resorcinol-acetaldehyde pre-condensation resin, 20-40 parts of hornblende powder, 1-5 parts of a root inhibitor and 2-4 parts of an antioxidant. Through the technical scheme, the problems of poor root-puncture resistance and poor puncture resistance of the asphalt waterproof coiled material in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of waterproof materials technology, specifically to a root-penetration-resistant bitumen waterproof membrane and its preparation method. Background Technology

[0002] Asphalt waterproof membrane is a flexible, rollable waterproof material commonly used to prevent rainwater or groundwater seepage. It has wide applications in roof waterproofing, basement waterproofing, and waterproofing in high-temperature areas, playing a crucial role in protecting buildings. As people's living standards improve and urban development accelerates, a beautiful and green living environment is what people aspire to. While traditional waterproof materials can protect buildings in greening or green roof designs, their puncture resistance is poor and they cannot prevent root penetration. Therefore, with the increasing demand for green buildings and sustainable development, developing a root-penetration-resistant asphalt waterproof membrane is of great significance. Summary of the Invention

[0003] This invention proposes a root-penetration resistant asphalt waterproof membrane and its preparation method, which solves the problems of poor root-penetration resistance and poor puncture resistance of asphalt waterproof membranes in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] A root-penetration resistant bitumen waterproof membrane comprises, from top to bottom, an upper isolation layer, an upper coating layer, a base layer, a lower coating layer, and a lower isolation layer. The raw materials of the upper coating layer and the lower coating layer each independently comprise the following components in parts by weight:

[0006] 90-110 parts asphalt, 2-24 parts styrene-butadiene-styrene copolymer, 4-10 parts resorcinol-acetaldehyde precondensation resin, 20-40 parts amphibole powder, 1-5 parts root inhibitor, and 2-4 parts antioxidant.

[0007] As a further technical solution, the weight ratio of the styrene-butadiene-styrene copolymer and the resorcinol-acetaldehyde precondensation resin is 1~2:1.

[0008] As a further technical solution, the amphibole powder is 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0009] Modifying amphibole powder with 7-chloro-4-hydroxyquinoline-3-carboxylic acid can improve its dispersion performance in asphalt layers and form intermolecular hydrogen bonds with resorcinol-acetaldehyde precondensation resin, thereby increasing the stability of amphibole powder and further improving the root penetration resistance and puncture strength of asphalt waterproof membranes.

[0010] As a further technical solution, the preparation method of the 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder includes the following steps: dissolving 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution, adding amphibole powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution, stirring evenly, and concentrating to obtain the 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0011] As a further technical solution, the weight ratio of the amphibole powder to 7-chloro-4-hydroxyquinoline-3-carboxylic acid is 9~19:1.

[0012] As a further technical solution, the mass fraction of the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution is 10%~15%.

[0013] As a further technical solution, the root inhibitor is B2 root inhibitor or B5 root inhibitor; the antioxidant is one or more of antioxidant 1098, antioxidant 697 or antioxidant 168.

[0014] As a further technical solution, the upper and lower isolation layers are each independently made of PE film or PET film; the base layer is made of long-fiber reinforced polyester felt.

[0015] This invention also proposes a method for preparing a root-penetration-resistant asphalt waterproof membrane, comprising the following steps:

[0016] S1. Mix the raw materials of the top coating layer evenly according to the weight parts to obtain the top coating layer mixture;

[0017] S2. Mix the raw materials of the lower coating layer evenly according to the weight parts to obtain the lower coating layer mixture;

[0018] S3. The upper coating layer mixture and the lower coating layer mixture are respectively applied to the upper and lower sides of the tire base layer and rolled to form an upper coating layer and a lower coating layer respectively located on the upper and lower sides of the tire base layer.

[0019] S4. Lay an upper isolation layer on the upper coating layer and a lower isolation layer on the lower coating layer to obtain an asphalt waterproof membrane. As a further technical solution, in steps S1 and S2, the mixing temperature is 178~185℃.

[0020] As a further technical solution, the thickness of the base layer is 1.0-1.6mm, the thickness of the upper and lower isolation layers is 0.008-0.015mm, and the thickness of the upper and lower coating layers is 0.8-1.4mm.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] In this invention, the coating layer includes a styrene-butadiene-styrene copolymer and a resorcinol-acetaldehyde precondensation resin. The synergistic effect of these two components effectively improves the root penetration resistance and puncture strength of the asphalt waterproofing membrane. Furthermore, the added amphibole enhances the overall structure of the asphalt waterproofing membrane, thereby also improving its root penetration resistance and puncture strength. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following examples and comparative examples, the asphalt was 90# asphalt, manufactured by Shandong Zhiyuan Road Maintenance Co., Ltd.; the styrene-butadiene-styrene copolymer was model D1101 JU, manufactured by Dongguan Baojia Plastics Co., Ltd.; the resorcinol-acetaldehyde precondensation resin was product number YK2584, manufactured by Hubei Yongkuo Technology Co., Ltd.; the amphibole powder had a particle size of 325 mesh, manufactured by Lingshou County Tianlong Mineral Products Processing Plant; the isolation layer was a PE film with a thickness of 0.01 mm, manufactured by Shandong Dexuda Geotechnical Materials Co., Ltd.; and the base layer was long-fiber reinforced polyester felt, model 260 g / m². 2 Long-fiber reinforced polyester felt with a thickness of 1.38 mm.

[0025] Example 1

[0026] A root-penetration resistant bitumen waterproof membrane comprises, from top to bottom, an upper release layer, an upper coating layer, a base layer, a lower coating layer, and a lower release layer. The raw materials of the upper coating layer and the lower coating layer each independently comprise the following components in parts by weight:

[0027] 90 parts asphalt, 2 parts styrene-butadiene-styrene copolymer, 4 parts resorcinol-acetaldehyde precondensation resin, 20 parts amphibole powder, 1 part B2 root inhibitor, 2 parts antioxidant 1098.

[0028] Its preparation method includes the following steps:

[0029] S1. Mix the raw materials of the top coating layer evenly at 180°C according to the weight parts to obtain the top coating layer mixture;

[0030] S2. Mix the raw materials of the lower coating layer evenly at 180°C according to the weight parts to obtain the lower coating layer mixture;

[0031] S3. Apply the upper coating mixture and the lower coating mixture to the upper and lower sides of the 1.38mm thick tire base layer respectively, and roll-press to obtain an upper coating layer and a lower coating layer with a thickness of 1.3mm respectively on the upper and lower sides of the tire base layer.

[0032] S4. Lay a 0.01mm thick upper isolation layer on the upper coating layer, and lay a 0.01mm thick lower isolation layer on the lower coating layer to obtain the asphalt waterproof membrane.

[0033] Example 2

[0034] A root-penetration resistant bitumen waterproof membrane comprises, from top to bottom, an upper release layer, an upper coating layer, a base layer, a lower coating layer, and a lower release layer. The raw materials of the upper coating layer and the lower coating layer each independently comprise the following components in parts by weight:

[0035] 100 parts asphalt, 15 parts styrene-butadiene-styrene copolymer, 7 parts resorcinol-acetaldehyde precondensation resin, 30 parts amphibole powder, 3 parts B2 root inhibitor, and 3 parts antioxidant 1098.

[0036] Its preparation method includes the following steps:

[0037] S1. Mix the raw materials of the top coating layer evenly at 185°C according to the weight parts to obtain the top coating layer mixture;

[0038] S2. Mix the raw materials of the lower coating layer evenly at 185°C according to the weight parts to obtain the lower coating layer mixture;

[0039] S3. Apply the upper coating mixture and the lower coating mixture to the upper and lower sides of the 1.38mm thick tire base layer respectively, and roll-press to obtain an upper coating layer and a lower coating layer with a thickness of 1.3mm respectively on the upper and lower sides of the tire base layer.

[0040] S4. Lay a 0.01mm thick upper isolation layer on the upper coating layer, and lay a 0.01mm thick lower isolation layer on the lower coating layer to obtain the asphalt waterproof membrane.

[0041] Example 3

[0042] A root-penetration resistant bitumen waterproof membrane comprises, from top to bottom, an upper release layer, an upper coating layer, a base layer, a lower coating layer, and a lower release layer. The raw materials of the upper coating layer and the lower coating layer each independently comprise the following components in parts by weight:

[0043] 110 parts asphalt, 24 parts styrene-butadiene-styrene copolymer, 10 parts resorcinol-acetaldehyde precondensation resin, 40 parts amphibole powder, 5 parts B2 root inhibitor, and 4 parts antioxidant 1098.

[0044] Its preparation method includes the following steps:

[0045] S1. Mix the raw materials of the top coating layer evenly at 185°C according to the weight parts to obtain the top coating layer mixture;

[0046] S2. Mix the raw materials of the lower coating layer evenly at 185°C according to the weight parts to obtain the lower coating layer mixture;

[0047] S3. Apply the upper coating mixture and the lower coating mixture to the upper and lower sides of the 1.38mm thick tire base layer respectively, and roll-press to obtain an upper coating layer and a lower coating layer with a thickness of 1.3mm respectively on the upper and lower sides of the tire base layer.

[0048] S4. Lay a 0.01mm thick upper isolation layer on the upper coating layer, and lay a 0.01mm thick lower isolation layer on the lower coating layer to obtain the asphalt waterproof membrane.

[0049] Example 4

[0050] The only difference between this embodiment and Embodiment 3 is that the amount of styrene-butadiene-styrene copolymer added in both the upper and lower coating layers is 8 parts by weight.

[0051] Example 5

[0052] The only difference between this embodiment and Embodiment 3 is that the weight parts of the styrene-butadiene-styrene copolymer added in both the upper and lower coating layers are 14 parts, and the weight parts of the resorcinol-acetaldehyde precondensation resin added are 4 parts.

[0053] Example 6

[0054] The only difference between this embodiment and Embodiment 3 is that the weight parts of the styrene-butadiene-styrene copolymer added in both the upper and lower coating layers are 9 parts, and the weight parts of the resorcinol-acetaldehyde precondensation resin added are also 9 parts.

[0055] Example 7

[0056] The only difference between this embodiment and Embodiment 3 is that the weight parts of the styrene-butadiene-styrene copolymer added in both the upper and lower coating layers are 12 parts, and the weight parts of the resorcinol-acetaldehyde precondensation resin added are 6 parts.

[0057] Example 8

[0058] The only difference between this embodiment and Example 7 is that the amphibole powder is 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder. The preparation method of 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder includes the following steps: dissolving 5 parts of 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 15% (w / w) 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; adding 35 parts of amphibole powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; stirring evenly; and concentrating to obtain 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0059] Example 9

[0060] The only difference between this embodiment and Example 7 is that the amphibole powder is 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder. The preparation method of 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder includes the following steps: dissolving 1 part of 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 15% (w / w) 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; adding 39 parts of amphibole powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; stirring evenly; and concentrating to obtain 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0061] Example 10

[0062] The only difference between this embodiment and Embodiment 7 is that the amphibole powder is 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder. The preparation method of 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder includes the following steps: dissolving 4 parts of 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 15% (w / w) 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; adding 36 parts of amphibole powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; stirring evenly; and concentrating to obtain 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0063] Example 11

[0064] The only difference between this embodiment and Example 7 is that the amphibole powder is 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder. The preparation method of 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder includes the following steps: dissolving 2 parts of 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 15% (w / w) 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; adding 38 parts of amphibole powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution; stirring evenly; and concentrating to obtain 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder.

[0065] Comparative Example 1

[0066] The only difference between this comparative example and Example 1 is that neither the upper nor lower coating layer contained styrene-butadiene-styrene copolymer, and the amount of resorcinol-acetaldehyde precondensation resin added was 6 parts by weight.

[0067] Comparative Example 2

[0068] The only difference between this comparative example and Example 1 is that neither the upper nor lower coating layer contained resorcinol-acetaldehyde precondensation resin, and the amount of styrene-butadiene-styrene copolymer added was 6 parts by weight.

[0069] Comparative Example 3

[0070] The only difference between this comparative example and Example 1 is that neither the upper nor lower coating layer contains styrene-butadiene-styrene copolymer or resorcinol-acetaldehyde precondensation resin.

[0071] Comparative Example 4

[0072] The only difference between this comparative example and Example 1 is that no amphibole powder was added to either the upper or lower coating layer.

[0073] The root-penetration resistant bitumen waterproof membranes prepared in Examples 1-11 and Comparative Examples 1-4 were tested for root-penetration resistance according to GB / T 35468-2017 "Root-penetration resistant waterproof membranes for green roofs" and for puncture resistance according to GB / T 23457-2017 "Pre-laid waterproof membranes". The root-penetration resistance test cycle was 2 years and the puncture resistance test speed was 300 mm / min.

[0074] The test results are shown in Table 1 below:

[0075] Table 1 Test Results

[0076]

[0077] Compared with Comparative Examples 1-3, the root penetration resistance and puncture strength of Example 1 were significantly improved. This indicates that the styrene-butadiene-styrene copolymer and resorcinol-acetaldehyde precondensate resin in the coating layer have a synergistic effect, which can effectively improve the root penetration resistance and puncture strength of the asphalt waterproof membrane. Compared with Comparative Example 4, the root penetration resistance and puncture strength of Example 1 were significantly improved. This indicates that the addition of amphibole can also improve the root penetration resistance and puncture strength of the asphalt waterproof membrane.

[0078] Compared to Examples 4-5, the puncture resistance of Examples 6-7 was significantly improved, indicating that a weight ratio of styrene-butadiene-styrene copolymer to resorcinol-acetaldehyde precondensation resin of 1-2:1 can further improve the puncture resistance of the asphalt waterproofing membrane. Compared to Example 7, the puncture resistance of Examples 8-11 was significantly improved, indicating that 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified amphibole powder can improve the puncture resistance of the asphalt waterproofing membrane. Furthermore, compared to Examples 8-9, the puncture resistance of Examples 10-11 was improved, indicating that a weight ratio of amphibole powder to 7-chloro-4-hydroxyquinoline-3-carboxylic acid of 9-19:1 can further improve the puncture resistance of the asphalt waterproofing membrane.

[0079] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A root resistant asphaltic waterproofing membrane comprising, from top to bottom, an upper separation layer, an upper coating layer, a base layer, a lower coating layer and a lower separation layer, characterized in that, The raw materials of the upper and lower coating layers each independently comprise the following components by weight: 90-110 parts of asphalt, 2-24 parts of styrene-butadiene-styrene copolymer, 4-10 parts of resorcinol-acetaldehyde pre-condensed resin, 20-40 parts of hornblende powder, 1-5 parts of root inhibitor, and 2-4 parts of antioxidant; The weight ratio of the styrene-butadiene-styrene copolymer and the resorcinol-acetaldehyde pre-condensed resin is 1-2:1; The hornblende powder is a 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified hornblende powder.

2. The root resistant asphaltic waterproofing membrane according to claim 1, wherein, The preparation method of the 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified hornblende powder comprises the following steps: dissolving 7-chloro-4-hydroxyquinoline-3-carboxylic acid in ethanol to obtain a 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution, adding hornblende powder to the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution, stirring uniformly, and concentrating to obtain the 7-chloro-4-hydroxyquinoline-3-carboxylic acid modified hornblende powder.

3. The root resistant asphaltic waterproofing membrane according to claim 2, wherein, The weight ratio of the hornblende powder and the 7-chloro-4-hydroxyquinoline-3-carboxylic acid is 9-19:

1.

4. The root resistant asphaltic waterproofing membrane according to claim 2, wherein, The mass fraction of the 7-chloro-4-hydroxyquinoline-3-carboxylic acid solution is 10%-15%.

5. The root resistant asphaltic waterproofing membrane according to claim 1, wherein, The root inhibitor is a B2 root inhibitor or a B5 root inhibitor; and the antioxidant is one or more of antioxidant 1098, antioxidant 697, or antioxidant 168.

6. The root resistant asphaltic waterproofing membrane according to claim 1, wherein, The upper and lower isolation layers each independently are PE film or PET film; and the tire base layer is long fiber reinforced polyester felt.

7. The method for preparing a root-resistant bituminous waterproofing membrane according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, uniformly mixing the raw materials of the upper coating layer according to weight parts to obtain an upper coating layer mixture; S2, uniformly mixing the raw materials of the lower coating layer according to weight parts to obtain a lower coating layer mixture; S3, respectively coating the upper coating layer mixture and the lower coating layer mixture on the upper and lower sides of the tire base layer, and roll forming to obtain the upper coating layer and the lower coating layer respectively arranged on the upper and lower sides of the tire base layer; S4, laying an upper isolation layer on the upper coating layer and a lower isolation layer on the lower coating layer to obtain an asphalt waterproofing membrane.

8. A process for the preparation of a root resistant bituminous waterproofing membrane as claimed in claim 7, wherein, In steps S1 and S2, the temperature during mixing is 178-185°C.

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