A self-adhesive bitumen waterproof membrane for passive houses

Abstract

The present invention relates to the technical field of waterproof building materials and proposes a self-adhesive asphalt waterproof membrane for passive houses. The membrane comprises, from top to bottom, a protective film, an asphalt layer, a base layer, a self-adhesive layer, and a barrier membrane. The asphalt layer comprises the following raw materials by weight: 60-70 parts asphalt, 15-20 parts SBS, 8-15 parts softener, 20-30 parts modified mullite whiskers, 5-10 parts phenolic resin, and 1-3 parts antioxidant. The modified mullite whiskers are mullite whiskers modified with a modifier. This technical solution addresses the poor mechanical properties of self-adhesive asphalt waterproof membranes in related technologies.

Description

Technical Field

[0001] This invention relates to the field of waterproof building materials technology, specifically to a self-adhesive bitumen waterproof membrane for passive houses. Background Technology

[0002] Passive houses are a highly energy-efficient and comfortable building concept. Through advanced architectural design and technology, they achieve extremely low energy consumption, maintaining comfortable indoor temperature and humidity with virtually no need for traditional heating and cooling systems. Waterproofing is a crucial aspect of passive house construction. Self-adhesive waterproof membranes, due to their ease of application, good adhesion, and reliable waterproofing, have become a commonly used material in passive house waterproofing. However, current self-adhesive waterproof membranes used in passive houses still have some shortcomings in practical applications. One prominent issue is the need to improve their mechanical properties. Passive houses typically have higher requirements for the stability and durability of the building structure, and as part of the building envelope, waterproof membranes need to possess good mechanical properties to withstand various external forces. If the mechanical properties of the waterproof membrane are insufficient, problems such as cracking, deformation, and peeling may occur, thereby compromising the integrity of the waterproofing system, leading to water penetration, and affecting the energy-saving effect and service life of the passive house. Therefore, improving the mechanical properties of waterproof membranes is an urgent problem to be solved. Summary of the Invention

[0003] This invention proposes a self-adhesive bitumen waterproof membrane for passive houses, which solves the problem of poor mechanical properties of self-adhesive bitumen waterproof membranes in related technologies.

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

[0005] This invention proposes a self-adhesive bitumen waterproof membrane for passive houses, comprising, from top to bottom, a protective film, a bitumen layer, a base layer, a self-adhesive layer, and a release film. The bitumen layer comprises the following raw materials in parts by weight: 60-70 parts bitumen, 15-20 parts SBS, 8-15 parts softener, 20-30 parts modified mullite whiskers, 5-10 parts phenolic resin, and 1-3 parts antioxidant. The modified mullite whiskers are obtained by modifying mullite whiskers with a modifier. The modifier includes a silane coupling agent and a carboxyl-containing polymer. The mass ratio of the silane coupling agent to the carboxyl-containing polymer is 1:50 to 50:1.

[0006] As a further technical solution, the amount of the modifier added is 2% to 6% of the mass of the aminated mullite whiskers.

[0007] As a further technical solution, the carboxyl-containing polymer includes one or two of polyepoxysuccinic acid and carboxyl-terminated polycaprolactone.

[0008] As a further technical solution, the silane coupling agent is an aminosilane coupling agent.

[0009] As a further technical solution, the aminosilane coupling agent is 3-aminopropyltriethoxysilane.

[0010] As a further technical solution, the mass ratio of the silane coupling agent to the carboxyl-containing polymer is 3~5:1.

[0011] In this invention, by limiting the mass ratio of silane coupling agent to carboxyl-containing polymer to 3~5:1, the mechanical properties of self-adhesive bitumen waterproof membrane are further improved.

[0012] As a further technical solution, the mass ratio of the silane coupling agent to the carboxyl-containing polymer is 4:1.

[0013] As a further technical solution, the preparation method of the modified mullite whiskers includes the following steps: dissolving the modifier in deionized water, adding mullite whiskers for modification, and obtaining modified mullite whiskers after drying.

[0014] As a further technical solution, the modification temperature is 40~60℃ and the modification time is 3~5h.

[0015] As a further technical solution, the order of adding the modifier is as follows: first, add a silane coupling agent for the first modification, and then add a carboxyl-containing polymer for the second modification.

[0016] In this invention, the mechanical properties of the self-adhesive bitumen waterproof membrane are further improved by first modifying it with a silane coupling agent and then by second modifying it with a carboxyl-containing polymer.

[0017] As a further technical solution, the preparation method of the modified mullite whiskers includes the following steps: dissolving a silane coupling agent in deionized water, adding mullite whiskers for the first modification, adding a carboxyl-containing polymer for the second modification, and drying to obtain modified mullite whiskers.

[0018] As a further technical solution, the self-adhesive layer comprises the following raw materials in parts by weight: 30-40 parts SBS, 10-15 parts asphalt, 2-4 parts polyimide adhesive, 10-12 parts tackifying resin, 20-30 parts naphthenic oil, and 5-10 parts filler.

[0019] As a further technical solution, the self-adhesive layer also includes 9 to 13 parts of 17-hydroxyheptadecanoic acid.

[0020] In this invention, the mechanical properties of the self-adhesive bitumen waterproof membrane are further improved by adding 9 to 13 parts of 17-hydroxyheptadecanoic acid to the self-adhesive layer.

[0021] As a further technical solution, the softener includes one or two of aromatic oil and reduced-pressure engine oil.

[0022] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 164, and antioxidant 1098.

[0023] As a further technical solution, the base layer includes one or both of fiberglass and polyester.

[0024] As a further technical solution, the filler includes one or more of kaolin, talc powder, and lime powder.

[0025] As a further technical solution, the tackifying resin includes one or more of rosin resin, phenolic resin, and terpene resin.

[0026] As a further technical solution, both the protective layer and the isolation layer are PE films.

[0027] As a further technical solution, the thickness of the PE film is 0.02~0.04mm.

[0028] As a further technical solution, the thickness of the base layer is 1 mm, the thickness of the asphalt layer is 1.4~1.8 mm, and the thickness of the self-adhesive layer is 0.4~0.8 mm.

[0029] This invention also proposes a method for preparing a self-adhesive bitumen waterproof membrane for passive houses, comprising the following steps:

[0030] S1. After mixing asphalt, SBS, softener, modified mullite whiskers, phenolic resin and antioxidant, an asphalt layer is obtained.

[0031] S2. SBS, asphalt, polyimide adhesive, tackifying resin, naphthenic oil and filler are mixed and melted, and then degassed and cooled under vacuum to obtain a self-adhesive layer.

[0032] S3. Lay the asphalt layer on top of the base layer, lay the self-adhesive layer on the bottom of the base layer, lay a protective film on the asphalt layer, lay a release film on the self-adhesive layer, and after cooling and rolling, obtain the self-adhesive asphalt waterproof membrane.

[0033] This invention also proposes a method for preparing a self-adhesive bitumen waterproof membrane for passive houses and the application of the prepared self-adhesive bitumen waterproof membrane in passive houses.

[0034] The working principle and beneficial effects of this invention are as follows:

[0035] In this invention, the self-adhesive waterproof membrane is composed of a protective film, an asphalt layer, a base layer, a self-adhesive layer, and a release film. The layers work together to form a tight waterproof system. By adding carboxyl-modified mullite whiskers to the asphalt layer, the mechanical properties of the self-adhesive waterproof membrane are improved, solving the problem of poor mechanical properties of the self-adhesive waterproof membrane. This enables it to provide more reliable waterproof protection for passive houses and has broad application prospects. Detailed Implementation

[0036] 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.

[0037] In the following examples and comparative examples:

[0038] Asphalt, type: 70# asphalt; SBS, type: D1101 JO; Polyepoxysuccinic acid, active ingredient content 99%, purchased from Mitsui Chemicals (Shandong) Co., Ltd.; Carboxyl-terminated polycaprolactone, viscosity: 1.75~2.25 dL / g; Aromatic oil, aromatic content: 80%~85%; Reduced-pressure engine oil, item number: 116-18, purchased from Jinan Xinhuihuang Chemical Co., Ltd.; Naphthenic oil, type: KN4010; Phenolic resin, type: 2402; Rosin resin, type: K1, purchased from Guangdong Dingxin Polymer Technology Co., Ltd.; Terpene resin, type: T100; Mullite whiskers, diameter: 0.2~3μm, length: 5~200μm; Fiberglass base, thickness: 1mm; Polyester base, thickness: 1mm.

[0039] Example 1

[0040] A method for preparing a self-adhesive bitumen waterproof membrane for passive houses includes the following steps:

[0041] S1. Mix 60 parts asphalt, 15 parts SBS, 8 parts aromatic oil, 20 parts modified mullite whiskers, 5 parts phenolic resin, and 1 part antioxidant 1010 to obtain an asphalt layer with a thickness of 1.4 mm.

[0042] S2. Mix 30 parts SBS, 10 parts asphalt, 2 parts polyimide adhesive, 10 parts rosin resin, 20 parts naphthenic oil, and 5 parts kaolin, then melt the mixture and obtain a self-adhesive layer with a thickness of 0.8 mm after vacuum degassing and cooling.

[0043] S3. Lay the asphalt layer on top of the fiberglass substrate, lay the self-adhesive layer on the bottom of the fiberglass substrate, lay a PE film with a thickness of 0.03mm on the asphalt layer, lay a PE film with a thickness of 0.03mm on the self-adhesive layer, and after cooling and rolling, obtain the self-adhesive asphalt waterproof membrane.

[0044] The method for preparing modified mullite whiskers includes the following steps:

[0045] 0.8 g of 3-aminopropyltriethoxysilane and 0.4 g of polyepoxysuccinic acid were dissolved in 500 mL of deionized water, and 60 g of mullite whiskers were added. The mixture was heated to 40 °C and stirred for 5 h. After drying, modified mullite whiskers were obtained.

[0046] Example 2

[0047] A method for preparing a self-adhesive bitumen waterproof membrane for passive houses includes the following steps:

[0048] S1. Mix 65 parts asphalt, 18 parts SBS, 12 parts aromatic oil, 25 parts modified mullite whiskers, 7 parts phenolic resin, and 2 parts antioxidant 164 to obtain an asphalt layer with a thickness of 1.6 mm.

[0049] S2. Mix 35 parts SBS, 12 parts asphalt, 3 parts polyimide adhesive, 11 parts phenolic resin, 25 parts naphthenic oil, and 7 parts talc powder, melt them, and then degas and cool them under vacuum to obtain a self-adhesive layer with a thickness of 0.6 mm.

[0050] S3. Lay the asphalt layer on top of the polyester substrate, lay the self-adhesive layer on the bottom of the polyester substrate, lay a 0.04mm thick PE film on the asphalt layer, lay a 0.04mm thick PE film on the self-adhesive layer, and after cooling and rolling, obtain the self-adhesive asphalt waterproof membrane.

[0051] The method for preparing modified mullite whiskers includes the following steps:

[0052] 1.6 g of 3-aminopropyltriethoxysilane and 0.8 g of carboxyl-terminated polycaprolactone were dissolved in 500 mL of deionized water, and 60 g of mullite whiskers were added. The mixture was heated to 50 °C and stirred for 4 h. After drying, modified mullite whiskers were obtained.

[0053] Example 3

[0054] A method for preparing a self-adhesive bitumen waterproof membrane for passive houses includes the following steps:

[0055] S1. Mix 70 parts asphalt, 20 parts SBS, 15 parts reduced-pressure engine oil, 30 parts modified mullite whiskers, 10 parts phenolic resin, and 3 parts antioxidant 1098 to obtain an asphalt layer with a thickness of 1.8 mm.

[0056] S2. Mix 40 parts SBS, 15 parts asphalt, 4 parts polyimide adhesive, 12 parts terpene resin, 30 parts naphthenic oil, and 10 parts lime powder, then melt the mixture. After vacuum degassing and cooling, a self-adhesive layer with a thickness of 0.4 mm is obtained.

[0057] S3. Lay the asphalt layer on top of the fiberglass substrate, lay the self-adhesive layer on the bottom of the fiberglass substrate, lay a PE film with a thickness of 0.02mm on the asphalt layer, lay a PE film with a thickness of 0.02mm on the self-adhesive layer, and after cooling and rolling, obtain the self-adhesive asphalt waterproof membrane.

[0058] The method for preparing modified mullite whiskers includes the following steps:

[0059] 2.4 g of 3-aminopropyltriethoxysilane and 1.2 g of polyepoxysuccinic acid were dissolved in 500 mL of deionized water, and 60 g of mullite whiskers were added. The mixture was heated to 60 °C and stirred for 3 h. After drying, modified mullite whiskers were obtained.

[0060] Example 4

[0061] The only difference between this embodiment and Example 1 is that the method for preparing modified mullite whiskers includes the following steps:

[0062] Dissolve 0.8 g of 3-aminopropyltriethoxysilane in 500 mL of deionized water, add 60 g of mullite whiskers, heat to 40 °C, stir for 2.5 h, then add 0.4 g of polyepoxysuccinic acid, stir at 40 °C for 2.5 h, and dry to obtain modified mullite whiskers.

[0063] Example 5

[0064] The only difference between this embodiment and Example 1 is that the method for preparing modified mullite whiskers includes the following steps:

[0065] Dissolve 0.4 g of polyepoxysuccinic acid in 500 mL of deionized water, add 60 g of mullite whiskers, heat to 40 °C, stir for 2.5 h, then add 0.8 g of 3-aminopropyltriethoxysilane, stir at 40 °C for 2.5 h, and dry to obtain modified mullite whiskers.

[0066] Example 6

[0067] The only difference between this embodiment and Example 4 is that the amount of 3-aminopropyltriethoxysilane added is 1.05g and the amount of polyepoxysuccinic acid added is 0.15g.

[0068] Example 7

[0069] The only difference between this embodiment and Example 4 is that the amount of 3-aminopropyltriethoxysilane added is 0.9g and the amount of polyepoxysuccinic acid added is 0.3g.

[0070] Example 8

[0071] The only difference between this embodiment and Example 4 is that the amount of 3-aminopropyltriethoxysilane added is 0.96g and the amount of polyepoxysuccinic acid added is 0.24g.

[0072] Example 9

[0073] The only difference between this embodiment and Example 4 is that the amount of 3-aminopropyltriethoxysilane added is 1.0g and the amount of polyepoxysuccinic acid added is 0.2g.

[0074] Example 10

[0075] The only difference between this embodiment and Example 8 is that 5 parts of 17-hydroxyheptadecanoic acid are added to the self-adhesive layer.

[0076] Example 11

[0077] The only difference between this embodiment and Example 8 is that 15 parts of 17-hydroxyheptadecanoic acid are added to the self-adhesive layer.

[0078] Example 12

[0079] The only difference between this embodiment and Example 8 is that 9 parts of 17-hydroxyheptadecanoic acid are added to the self-adhesive layer.

[0080] Example 13

[0081] The only difference between this embodiment and Example 8 is that 13 parts of 17-hydroxyheptadecanoic acid are added to the self-adhesive layer.

[0082] Comparative Example 1

[0083] The only difference between this comparative example and Example 1 is that the modified mullite whiskers are replaced with an equal amount of mullite whiskers.

[0084] Comparative Example 2

[0085] The only difference between this comparative example and Example 1 is that 3-aminopropyltriethoxysilane is replaced with an equal amount of polyepoxysuccinic acid.

[0086] Comparative Example 3

[0087] The only difference between this comparative example and Example 1 is that polyepoxysuccinic acid is replaced with an equal amount of 3-aminopropyltriethoxysilane.

[0088] The maximum peak tensile force and maximum peak elongation in the longitudinal direction of the self-adhesive bitumen waterproof membranes prepared in Examples 1-13 and Comparative Examples 1-3 were determined according to the test methods in GB / T 328.8-2007 "Test Methods for Building Waterproof Membranes Part 8: Tensile Properties of Bituminous Waterproof Membranes". The test results are shown in Table 1.

[0089] Table 1 Performance test results of self-adhesive bitumen waterproof membrane

[0090]

[0091] Compared with Example 1, no modification was made to the mullite whiskers in Comparative Example 1, only polyepoxysuccinic acid was used to modify the mullite whiskers in Comparative Example 2, and only 3-aminopropyltriethoxysilane was used to modify the mullite whiskers in Comparative Example 3. As a result, the maximum peak tensile strength and maximum peak elongation of the self-adhesive bitumen waterproof membranes prepared in Comparative Examples 1 to 3 were lower than those in Example 1, indicating that when 3-aminopropyltriethoxysilane and polyepoxysuccinic acid are used to modify the mullite whiskers at the same time, the mechanical properties of the self-adhesive bitumen waterproof membrane can be improved.

[0092] Compared with Example 1, the order of addition of 3-aminopropyltriethoxysilane and polyepoxysuccinic acid was changed in Examples 4 and 5. As a result, the maximum peak tensile strength and maximum peak elongation of the self-adhesive bitumen waterproof membrane prepared in Example 4 were higher than those in Examples 1 and 5. This indicates that when 3-aminopropyltriethoxysilane is first modified to modify the mullite whiskers and polyepoxysuccinic acid is modified to modify them a second time, the mechanical properties of the self-adhesive bitumen waterproof membrane can be further improved.

[0093] Compared with Example 4, Examples 6-9 changed the mass ratio of 3-aminopropyltriethoxysilane and polyepoxysuccinic acid. The results showed that the maximum peak tensile strength and maximum peak elongation of the self-adhesive bitumen waterproof membranes prepared in Examples 7-9 were higher than those in Examples 4 and 6, indicating that when the mass ratio of 3-aminopropyltriethoxysilane to polyepoxysuccinic acid is 3-5:1, the mechanical properties of the self-adhesive bitumen waterproof membrane can be further improved. Comparing Examples 7-9, it was found that the maximum peak tensile strength and maximum peak elongation of the self-adhesive bitumen waterproof membrane prepared in Example 8 were higher than those in Examples 7 and 9, indicating that when the mass ratio of 3-aminopropyltriethoxysilane to polyepoxysuccinic acid is 4:1, the mechanical properties of the self-adhesive bitumen waterproof membrane are the best.

[0094] Compared with Example 8, different amounts of 17-hydroxyheptadecanoic acid were added to the self-adhesive layer in Examples 10-13. As a result, the maximum peak tensile strength and maximum peak elongation of the self-adhesive bitumen waterproof membranes prepared in Examples 12-13 were higher than those in Examples 10 and 13, indicating that adding 9-13 parts of 17-hydroxyheptadecanoic acid to the self-adhesive layer can further improve the mechanical properties of the self-adhesive bitumen waterproof membrane.

[0095] 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 self-adhesive bitumen waterproof membrane for passive houses, characterized in that, From top to bottom, the material comprises a protective film, an asphalt layer, a base layer, a self-adhesive layer, and a release film. The asphalt layer consists of the following raw materials in parts by weight: 60-70 parts asphalt, 15-20 parts SBS, 8-15 parts softener, 20-30 parts modified mullite whiskers, 5-10 parts phenolic resin, and 1-3 parts antioxidant. The modified mullite whiskers are obtained by modifying mullite whiskers with a modifier. The modifier includes an aminosilane coupling agent and a carboxyl-containing polymer. The mass ratio of the aminosilane coupling agent to the carboxyl-containing polymer is 1:50 to 50:

1. The carboxyl-containing polymer includes one or two of polyepoxysuccinic acid and carboxyl-terminated polycaprolactone. The modifier is added in the following order: first, an aminosilane coupling agent is added for the first modification, and then a carboxyl-containing polymer is added for the second modification.

2. The self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The amount of the modifier added is 2% to 6% of the mass of the mullite whiskers.

3. The self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The mass ratio of the aminosilane coupling agent to the carboxyl-containing polymer is 3~5:

1.

4. The self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The method for preparing the modified mullite whiskers includes the following steps: dissolving the modifier in deionized water, adding mullite whiskers for modification, and drying to obtain the modified mullite whiskers.

5. A self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The self-adhesive layer comprises the following raw materials in parts by weight: 30-40 parts SBS, 10-15 parts asphalt, 2-4 parts polyimide adhesive, 10-12 parts tackifying resin, 20-30 parts naphthenic oil, and 5-10 parts filler.

6. A self-adhesive bitumen waterproof membrane for passive houses according to claim 5, characterized in that, The self-adhesive layer also includes 9 to 13 parts of 17-hydroxyheptadecanoic acid.

7. The self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The softener includes one or both of aromatic oil and reduced-pressure engine oil.

8. The self-adhesive bitumen waterproof membrane for passive houses according to claim 1, characterized in that, The base layer includes one or both of fiberglass and polyester.

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