An alkali-resistant self-adhesive vapor barrier coil for passive houses

Abstract

The present invention relates to the technical field of vapor barrier coils, and provides an alkali-resistant self-adhesive vapor barrier coil for passive houses. The alkali-resistant self-adhesive vapor barrier coil for passive houses sequentially includes an aluminum foil surface layer, a modified asphalt layer, a base ply, a self-adhesive layer, and an isolation layer film from top to bottom. The modified asphalt layer comprises the following raw materials in parts by weight: 90-100 parts of 70# asphalt, 12-15 parts of an asphalt modifier, 35-45 parts of a filler, 9-10 parts of an antioxidant, and 6-8 parts of a stabilizer; the asphalt modifier is composed of SBS and low-density polyethylene, and the mass ratio of SBS to low-density polyethylene is 5:1-3. Through the above technical solution, the problems of low vapor barrier performance and easy water permeability of vapor barrier coils in the related art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vapor barrier membranes, and more specifically, to an alkali-resistant self-adhesive vapor barrier membrane for passive houses. Background Art

[0002] A passive house, namely a passive ultra-low energy consumption building, is a building that, by adopting advanced energy-saving design concepts and technical means, can maintain a comfortable indoor temperature, humidity, and air quality relying only on its own thermal insulation performance and an efficient heat recovery ventilation system, with little or no reliance on traditional active heating and cooling equipment. In today's construction field, passive houses, as a highly energy-efficient building form, are attracting increasing widespread attention. However, the construction of passive houses poses higher requirements for building materials. In passive houses, the control of water vapor is crucial. Due to the excellent thermal insulation performance of passive houses, once water vapor enters the building structure, it is very difficult to dissipate, easily leading to problems such as a decline in the performance of thermal insulation materials, mildew, and corrosion, thereby affecting the overall performance and service life of the building. Therefore, developing an alkali-resistant self-adhesive vapor barrier membrane for passive houses with high vapor barrier performance and water impermeability is an urgent problem to be solved at present. Summary of the Invention

[0003] The present invention provides an alkali-resistant self-adhesive vapor barrier membrane for passive houses, which solves the problems of low vapor barrier performance and easy water permeability of vapor barrier membranes in related technologies.

[0004] The technical solution of the present invention is as follows: The present invention provides an alkali-resistant self-adhesive vapor barrier membrane for passive houses, which sequentially includes an aluminum foil surface layer, a modified asphalt layer, a base layer, a self-adhesive layer, and an isolation layer film from top to bottom. The modified asphalt layer includes the following raw materials in parts by weight: 90 - 100 parts of 70# asphalt, 12 - 15 parts of an asphalt modifier, 35 - 45 parts of a filler, 9 - 10 parts of an antioxidant, and 6 - 8 parts of a stabilizer;

[0005] The asphalt modifier is composed of SBS and low-density polyethylene, and the mass ratio of SBS to low-density polyethylene is 5:1 - 3.

[0006] As a further technical solution, the low-density polyethylene is composed of a first low-density polyethylene and a second low-density polyethylene, and the swelling ratios of the first low-density polyethylene and the second low-density polyethylene are different.

[0007] In the present invention, by adjusting the swelling ratio of the low-density polyethylene, the pores and cracks of the modified asphalt layer are reduced, and the water vapor diffusion resistance value and water impermeability of the vapor barrier membrane are improved.

[0008] As a further technical solution, the swelling ratio of the first low-density polyethylene is 0.87, the swelling ratio of the second low-density polyethylene is 1.8, and the mass ratio of the first low-density polyethylene to the second low-density polyethylene is 1:1 to 2.

[0009] As a further technical solution, the filler includes one or more of talcum powder, alumina, and montmorillonite.

[0010] As a further technical solution, when the filler is alumina, the alumina is modified alumina.

[0011] As a further technical solution, the modifier of the modified alumina is 3-hydroxyphenylphosphonopropionic acid.

[0012] As a further technical solution, the preparation steps of the modified alumina include: dissolving 3-hydroxyphenylphosphonopropionic acid, adding alumina and dispersing evenly, and obtaining the modified alumina after filtration and drying.

[0013] In the present invention, adding modified alumina as an adsorption filler enhances the water vapor adsorption capacity of the filler, and further improves the water vapor diffusion resistance value and water impermeability of the vapor barrier coil.

[0014] As a further technical solution, the carcass ply is a fiberglass carcass.

[0015] As a further technical solution, the antioxidant includes one or more of antioxidant 1098, antioxidant 697, and antioxidant 3114.

[0016] As a further technical solution, the stabilizer includes one or two of zinc stearate and calcium stearate.

[0017] The present invention also provides a preparation method for an alkali-resistant self-adhesive vapor barrier coil for a passive house, including the following steps:

[0018] S1. Weigh the raw materials of the modified asphalt layer, and obtain the modified asphalt layer after melting.

[0019] S2. Arrange the aluminum foil surface layer, modified asphalt layer, carcass ply, self-adhesive layer, and isolation layer film in sequence, and obtain the alkali-resistant self-adhesive vapor barrier coil after rolling, extrusion, and cooling.

[0020] As a further technical solution, the self-adhesive layer is self-adhesive rubber asphalt, and the isolation layer film is a polyethylene film.

[0021] The working principle and beneficial effects of the present invention are:

[0022] In the present invention, aluminum foil is used as the surface layer to prevent alkaline substances from contacting other materials inside the coil material, enhancing the alkali resistance of the vapor barrier coil material. SBS and low-density polyethylene are used as composite modifiers to make the surface of the modified asphalt layer denser, reducing the existence of micro-pores and cracks, thereby improving the vapor barrier performance and water impermeability of the vapor barrier coil material. Specific Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] In the following examples and comparative examples:

[0025] SBS: Model is D1102;

[0026] The first low-density polyethylene: The swelling ratio is 0.87, and the density is 0.924 g / cm 3 ;

[0027] The second low-density polyethylene: The swelling ratio is 1.8, and the density is 0.917 g / cm 3 ;

[0028] Aluminum foil surface layer: The thickness is 0.1 mm;

[0029] Self-adhesive layer: Self-adhesive rubber asphalt 0.3 mm;

[0030] Release layer film: Polyethylene film, the thickness is 0.2 mm;

[0031] Base ply: Fiberglass ply, 0.5 mm;

[0032] Alkali-resistant self-adhesive vapor barrier coil material: The size is 10 m × 1 m × 1.6 mm.

[0033] Example 1

[0034] A preparation method of an alkali-resistant self-adhesive vapor barrier coil material for passive houses includes the following steps:

[0035] S1. Weigh 95 parts of 70# asphalt, 10.8 parts of SBS, 1.2 parts of the first low-density polyethylene, 35 parts of alumina, 9 parts of antioxidant 1098, and 6 parts of zinc stearate, heat up to 170 °C, and melt and stir for 1 h to obtain the modified asphalt layer;

[0036] S2. Arrange the aluminum foil surface layer, the modified asphalt layer, the base ply, the self-adhesive layer, and the release layer film in sequence, and after roll extrusion and cooling, the alkali-resistant self-adhesive vapor barrier coil material is obtained.

[0037] Example 2

[0038] A preparation method of an alkali-resistant self-adhesive vapor barrier coil for a passive house, comprising the following steps:

[0039] S1. Weigh 95 parts of No. 70 asphalt, 11.7 parts of SBS, 1.3 parts of the first low-density polyethylene, 40 parts of talcum powder, 9.5 parts of antioxidant 697, and 7 parts of zinc stearate, heat up to 175 °C, and melt and stir for 45 min to obtain a modified asphalt layer;

[0040] S2. Arrange an aluminum foil surface layer, a modified asphalt layer, a base layer, a self-adhesive layer, and an isolation layer film in sequence, and after roll extrusion and cooling, an alkali-resistant self-adhesive vapor barrier coil is obtained.

[0041] Example 3

[0042] A preparation method of an alkali-resistant self-adhesive vapor barrier coil for a passive house, comprising the following steps:

[0043] S1. Weigh 100 parts of No. 70 asphalt, 13.5 parts of SBS, 1.5 parts of the first low-density polyethylene, 45 parts of montmorillonite, 10 parts of antioxidant 3114, and 8 parts of calcium stearate, heat up to 180 °C, and melt and stir for 30 min to obtain a modified asphalt layer;

[0044] S2. Arrange an aluminum foil surface layer, a modified asphalt layer, a base layer, a self-adhesive layer, and an isolation layer film in sequence, and after roll extrusion and cooling, an alkali-resistant self-adhesive vapor barrier coil is obtained.

[0045] Example 4

[0046] Compared with Example 1, the difference in Example 4 is that 10.8 parts of SBS and 1.2 parts of the first low-density polyethylene are replaced with 10 parts of SBS and 2 parts of the first low-density polyethylene.

[0047] Example 5

[0048] Compared with Example 1, the difference in Example 5 is that 10.8 parts of SBS and 1.2 parts of the first low-density polyethylene are replaced with 7.5 parts of SBS and 4.5 parts of the first low-density polyethylene.

[0049] Example 6

[0050] Compared with Example 1, the difference in Example 6 is that 10.8 parts of SBS and 1.2 parts of the first low-density polyethylene are replaced with 6 parts of SBS and 6 parts of the first low-density polyethylene.

[0051] Example 7

[0052] Compared with Example 5, the difference in Example 7 is that 4.5 parts of the first low-density polyethylene are replaced with an equal amount of the second low-density polyethylene.

[0053] Example 8

[0054] Compared with Example 5, Example 8 is different in that 4.5 parts of the first low-density polyethylene are replaced by 3 parts of the first low-density polyethylene and 1.5 parts of the second low-density polyethylene.

[0055] Example 9

[0056] Compared with Example 5, Example 9 is different in that 4.5 parts of the first low-density polyethylene are replaced by 2.25 parts of the first low-density polyethylene and 2.25 parts of the second low-density polyethylene.

[0057] Example 10

[0058] Compared with Example 5, Example 10 is different in that 4.5 parts of the first low-density polyethylene are replaced by 1.5 parts of the first low-density polyethylene and 3 parts of the second low-density polyethylene.

[0059] Example 11

[0060] Compared with Example 5, Example 11 is different in that 4.5 parts of the first low-density polyethylene are replaced by 1 part of the first low-density polyethylene and 3.5 parts of the second low-density polyethylene.

[0061] Example 12

[0062] Compared with Example 10, Example 12 is different in that the alumina is replaced by an equal amount of modified alumina;

[0063] Preparation of modified alumina: Weigh 8 parts of 3-hydroxyphenylphosphonopropionic acid, dissolve it in 40 parts of ethanol, add 64 parts of alumina, ultrasonically disperse for 1 h, filter by suction, and dry at 70 °C to obtain modified alumina.

[0064] Comparative Example 1

[0065] Compared with Example 1, Comparative Example 1 is different in that only SBS is added.

[0066] Comparative Example 2

[0067] Compared with Example 1, Comparative Example 2 is different in that only the first low-density polyethylene is added.

[0068] The alkali-resistant self-adhesive vapor barrier coils prepared in Examples 1 to 12 and Comparative Examples 1 to 2 were tested according to the following method:

[0069] 1. Vapor diffusion resistance value: According to the test method specified in GB / T 17146-2015 "Test Method for Water Vapor Permeability of Building Materials and Their Products", the vapor diffusion resistance value of the sample was tested.

[0070] 2. Water impermeability: According to the test method specified in GB / T 328.10-2007 "Test Methods for Building Waterproofing Membranes - Part 10: Bitumen and Polymer Waterproofing Membranes - Water Impermeability", select Method B to test the water impermeability of the sample at a pressure of 0.2 MPa for 30 min.

[0071] The test results are shown in the following table:

[0072] Table 1 Performance Test Results of Alkali-Resistant Self-Adhesive Vapor Barrier Membranes Prepared in Examples 1-12 and Comparative Examples 1-2

[0073]

[0074] Compared with Comparative Examples 1 and 2, SBS and the first low-density polyethylene were added simultaneously in Examples 1-6. As a result, the water vapor diffusion resistance values and water impermeability of Examples 1-6 were better than those of Comparative Examples 1 and 2, indicating that SBS and the first low-density polyethylene played a synergistic role and could improve the vapor barrier performance and water impermeability of the alkali-resistant self-adhesive vapor barrier membrane. In Examples 1 and 4-6, SBS and the first low-density polyethylene were added in different mass ratios. As a result, the water vapor diffusion resistance values of Examples 4 and 5 were better than those of Examples 1 and 6, indicating that when the mass ratio of SBS to the first low-density polyethylene was 5:1 to 3, the vapor barrier performance of the obtained alkali-resistant self-adhesive vapor barrier membrane was better.

[0075] Compared with Examples 5 and 7, the first low-density polyethylene and the second low-density polyethylene were added simultaneously in Examples 8-11. As a result, the water vapor diffusion resistance values of Examples 8-11 were better than those of Examples 5 and 7, indicating that the first low-density polyethylene and the second low-density polyethylene played a synergistic role and could improve the vapor barrier performance of the alkali-resistant self-adhesive vapor barrier membrane. In Examples 8-11, the first low-density polyethylene and the second low-density polyethylene were added in different mass ratios. As a result, the water vapor diffusion resistance values of Examples 9 and 10 were better than those of Examples 9 and 11, indicating that when the mass ratio of the first low-density polyethylene to the second low-density polyethylene was 1:1 to 2, the vapor barrier performance of the obtained alkali-resistant self-adhesive vapor barrier membrane was better.

[0076] Compared with Example 10, modified alumina was added in Example 12. As a result, the water vapor diffusion resistance value of Example 12 was better than that of Example 10, indicating that the addition of modified alumina could improve the vapor barrier performance of the alkali-resistant self-adhesive vapor barrier membrane.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An alkali-resistant self-adhesive vapor barrier coil for passive houses, characterized in that, It successively includes an aluminum foil surface layer, a modified asphalt layer, a base ply, a self-adhesive layer, and an isolation layer film from top to bottom. The modified asphalt layer comprises the following raw materials in parts by weight: 90 - 100 parts of 70# asphalt, 12 - 15 parts of an asphalt modifier, 35 - 45 parts of a filler, 9 - 10 parts of an antioxidant, and 6 - 8 parts of a stabilizer; the asphalt modifier is composed of SBS and low-density polyethylene, and the mass ratio of SBS to low-density polyethylene is 5:1 - 3; the low-density polyethylene is composed of a first low-density polyethylene and a second low-density polyethylene; the swelling ratio of the first low-density polyethylene is 0.87, the swelling ratio of the second low-density polyethylene is 1.8, and the mass ratio of the first low-density polyethylene to the second low-density polyethylene is 1:1 - 2; when the filler is alumina, the alumina is modified alumina, and the modifier of the modified alumina is 3-hydroxy phenylphosphonopropionic acid.

2. The alkali-resistant self-adhesive vapor barrier coil for a passive house according to claim 1, characterized in that, The preparation steps of the modified alumina include: dissolving 3-hydroxy phenylphosphonopropionic acid, adding alumina and dispersing uniformly, and obtaining the modified alumina after filtration and drying.

3. The alkali-resistant self-adhesive vapor barrier coil for a passive house according to claim 1, characterized in that The base ply is a fiberglass ply.

4. The alkali-resistant self-adhesive vapor barrier coil for passive houses according to claim 1, characterized in that, The antioxidant includes one or more of antioxidant 1098, antioxidant 697, and antioxidant 3114.

5. The alkali-resistant self-adhesive vapor barrier sheet for a passive house according to claim 1, characterized in that, The stabilizer includes one or both of zinc stearate and calcium stearate.

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