Waterproof roll coating material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of building materials, in particular to a waterproof roll coating material and a preparation method and application thereof. The waterproof roll coating material comprises asphalt, a modified component, a functional additive and a filler, in percentage by mass, the use amount of the asphalt is 35-55%; the modified component is prepared from the following components in parts by weight: 1 to 10 parts of SBR (Styrene Butadiene Rubber), 1 to 10 parts of SBS (Styrene Butadiene Styrene), 1 to 5 parts of SIS (Styrene Isoprene Styrene), 1 to 5 parts of thermoplastic rubber SAMYH-1901H and 1 to 5 parts of soda lime. According to the modified asphalt waterproof roll coating material, soda lime is added into the modified asphalt waterproof roll coating material, the soda lime has the effects of filling pores and increasing compactness, meanwhile, the soda lime can be synergistically matched with various modifiers and functional auxiliaries to remarkably improve the initial viscosity of an asphalt roll and bonding of the asphalt roll with a cement concrete base surface, and the hollowing phenomenon of the roll and the base surface is effectively reduced.

Description

Technical Field

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

[0002] Wet-laid asphalt waterproofing membrane is a waterproofing material that is applied directly using cement paste and other materials. This process eliminates the need for a base treatment agent, simplifying the construction process and ensuring a tight bond between the membrane and the cement base, creating a strong, waterproof overall structure. This membrane is based on high-quality petroleum asphalt and is often modified with elastomers such as SBS and SBR and tackifiers to enhance its low-temperature flexibility and adhesion. The membrane typically contains a high-toughness polyethylene film or polyester base fabric as a reinforcing matrix to ensure mechanical properties and dimensional stability. For ease of storage and application, the self-adhesive surface is coated with a silicone-coated release film to prevent adhesion before use.

[0003] In practical applications, wet-laid asphalt waterproofing membranes still face several key challenges that need to be addressed. Interfacial adhesion failure is particularly prominent. This primarily manifests as a weak bond between the asphalt layer and the cement base, leading to peeling, hollowing, and even detachment. This can cause "water bridging"—the disordered flow of water beneath the waterproofing layer, ultimately resulting in loss of waterproofing performance. This problem is multifaceted: first, the low polarity of asphalt prevents it from forming a strong chemical bond with the cement base; second, insufficient microscopic roughness of the base surface weakens the physical fit; and third, residual moisture at the interface during construction forms a weakened layer, further reducing interfacial bond strength. Another challenge is the material's resistance to thermal oxidative aging. When the membrane is exposed to high temperatures or oxidizing environments for extended periods, the asphalt components gradually oxidize and harden, losing their original flexibility and becoming brittle. Furthermore, polymers such as SBS used for modification can also degrade due to thermal oxidative stress, breaking their molecular chains and significantly reducing their toughening effect. This aging from the inside out will eventually cause the membrane to shrink and crack, and the adhesion and durability will also decrease, thereby shortening the effective service life of the waterproof layer. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a waterproof coiled coating material and a preparation method and application thereof.

[0005] In a first aspect, the present invention provides a modified asphalt composition, comprising: asphalt, a modifying component, a functional additive, and a filler; the asphalt is used in an amount of 35-55% by mass; In parts by weight, the modified components include: 1 to 10 parts of SBR, 1 to 10 parts of SBS, 1 to 5 parts of SIS, 1 to 5 parts of thermoplastic rubber SAMYH-1901H, and 1 to 5 parts of soda lime.

[0006] The present invention modifies asphalt using SBR, SBS, SIS, thermoplastic rubber SAMYH-1901H, and soda lime. The addition of soda lime chemically reacts with various components in cement to generate more gel, filling pores and increasing density. The soda lime, SBR, SBS, SIS, and thermoplastic rubber SAMYH-1901H simultaneously modify the asphalt to form a more stable network structure, ultimately creating a chemical-physical bond between the coating and cement with high adhesion and stability, while also exhibiting high weather resistance.

[0007] Furthermore, the modified component also includes 0.2 to 1 part by weight of an asphalt heat-resistant modifier. The asphalt heat-resistant modifier described herein is a modifier that modifies asphalt to improve its heat resistance. Examples include polymer modifiers, rubber modifiers, chemical modifiers, or natural asphalt that improve asphalt heat resistance.

[0008] In some specific embodiments of the present invention, the asphalt heat-resistant modifier is a polymer modifier, preferably a reactive polymer modifier, and more preferably Titan TM7686.

[0009] Furthermore, the asphalt is heavy traffic asphalt.

[0010] The heavy traffic asphalt described in the present invention is asphalt that has certain high temperature stability, aging resistance and the ability to cope with heavy traffic, including multiple models such as 50#, 70# and 90#. The present invention preferably uses 70# and 90# heavy traffic asphalt, which is modified by the combined action of modified components such as SBR, SBS, SIS, thermoplastic rubber SAMYH-1901H and soda lime to form a more stable network and bonding structure.

[0011] Furthermore, the mass ratio of the asphalt, the modified component, the functional additive and the filler is (35-55): (5-33): (8-21): (20-30); the functional additive includes: rubber oil and / or tire rubber powder; and the filler is heavy calcium carbonate.

[0012] Furthermore, the functional additives include, by weight, 5 to 10 parts of rubber oil and 3 to 10 parts of tire rubber powder.

[0013] The rubber oil is a functional additive commonly used in the preparation process of modified asphalt material, and is mainly divided into aromatic oil, naphthenic oil and paraffin oil, etc., which mainly plays a role of plasticizer or softening agent.

[0014] In the second aspect, the application provides a waterproof coiled material coating material, which comprises the modified asphalt composition.

[0015] In the third aspect, the application provides a preparation method of the waterproof coiled material coating material, which comprises the following steps: (1) mixing asphalt and rubber oil according to a predetermined proportion, heating and stirring to mix uniformly; (2) adding SBR, SBS, SIS and SAMYH-1901H and stirring to mix uniformly when the temperature rises to 130-180℃; (3) adding lime and tire rubber powder, heating to above 180℃ and stirring to mix uniformly; (4) adding heavy calcium carbonate and stirring to mix uniformly, and cooling to 170-175℃.

[0016] Further, in step (1), the stirring rate is 400-600 r / min; In step (2), the stirring rate is 800-1200 r / min, and the stirring time is 30-45 min; In step (3), the stirring rate is 1200-1500 r / min, and the stirring time is 2.5-3 h.

[0017] In the fourth aspect, the application provides a waterproof coiled material, which comprises the waterproof coiled material coating material.

[0018] In the fifth aspect, the application provides application of the modified asphalt composition or the waterproof coiled material coating material in preparation of one or more of a sealing layer, an adhesive layer, a protective layer or a waterproof layer.

[0019] The application has the following beneficial effects: 1. The modified asphalt waterproof coiled material coating material provided by the application can significantly improve the initial adhesion of the asphalt coiled material and the adhesion with the cement concrete base surface, and effectively reduce the occurrence of hollow drum phenomenon of the coiled material and the base surface, through the interaction of heavy traffic asphalt, SBR, SBS, SIS, SAMYH-1901H, tire rubber powder, lime and heavy calcium powder.

[0020] 2. The wet-modified asphalt waterproof roll coating provided by the present invention is added with soda lime, which can increase the density and reduce the porosity through chemical reaction. At the same time, it is mixed with SBR, SBS, SIS, SAMYH-1901H and asphalt for modification and cross-linking to form a more stable network structure, significantly improving the aging resistance, stability, weather resistance and bonding performance.

[0021] 3. The modified asphalt waterproof membrane provided by the present invention is suitable for a variety of construction methods, including hot melt method, self-adhesive method, cold adhesive method, mechanical fixing method and wet laying method, especially wet laying method. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Unless otherwise specified, the experimental methods involved in the following examples are all conventional methods in the art. For example, reference can be made to experimental manuals in the art, or the conditions recommended by the manufacturer's instructions.

[0024] Unless otherwise specified, the experimental materials and reagents involved in the following examples can be obtained from commercial sources.

[0025] Example 1 This embodiment provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 1 Raw material components of Example 1

[0026] Among them, SBS is styrene-butadiene-styrene block copolymer (Styrene-Butadiene-Styrene), SBR is styrene-butadiene rubber (Styrene-Butadiene Rubber) made by polymerization of styrene and butadiene, SIS is styrene-isoprene-styrene block copolymer (Styrene-Isoprene-Styrene), and 1901H is thermoplastic rubber SAMYH-1901H.

[0027] Among them, X1825 is soda lime, which can be purchased commercially (for example, Beijing Xingming Technology Co., Ltd.).

[0028] Among them, the asphalt is 70# / 90# heavy traffic asphalt 70#, Titan TM7686 is the asphalt modifier Titan TM7686 (Asphalt heat resistance modifier). Rubber oil is an organic aromatic oil.

[0029] Among them, the tire rubber powder is 60 mesh.

[0030] Among them, heavy calcium is heavy calcium powder (200 mesh).

[0031] The modified asphalt waterproofing membrane coating material of the above raw material components is prepared by the following method: Step 1: Weigh heavy traffic asphalt and rubber oil according to the above weight fractions and add them into the reactor, heat up and stir at a low speed of 500r / min.

[0032] Step 2: Raise the temperature to 150°C, slowly add SBR, SBS, SIS and 1901H into step 1 and stir at a stirring rate of 1000 r / min for 30-45 minutes at medium speed.

[0033] Step 3: Add X1825 and tire rubber powder and stir, heat to 180℃ and keep warm, stir at a speed of 1300r / min, and stir at high speed for 3h; Step 4: Add heavy calcium carbonate and stir evenly for 1 hour, then cool to 175°C to obtain the wet-laid modified asphalt waterproofing membrane coating.

[0034] Example 2 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 2 Example 2 Raw material components

[0035] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0036] Example 3 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 3 Raw material components of Example 3

[0037] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0038] Comparative Example 1 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 4 Raw material components of Comparative Example 1

[0039] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0040] Comparative Example 2 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 5 Raw material components of Comparative Example 2

[0041] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0042] Comparative Example 3 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 6 Raw material components of Comparative Example 3

[0043] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0044] Comparative Example 4 This comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components: Table 6 Raw material components of Comparative Example 3

[0045] The above raw material components are selected in the same manner as in Example 1, and the preparation method is the same as in Example 1.

[0046] Experimental Example 1 The present invention performs performance testing on the above embodiments and comparative examples, and the process is as follows: The coating materials prepared in each embodiment and comparative example were subjected to performance tests such as GB / T 35467-2017 The results are shown in the following table: Table 8 Performance test results of Examples 1-3

[0047] This shows that, at a certain dosage, the addition of X1825 can significantly improve the coating's bond strength (the higher the peel strength, the higher the adhesion). This may be due to the NaOH / KOH in the soda lime reacting with silica (SiO2) or aluminates in the cement to form additional gelling substances (such as sodium silicate gel), filling pores and enhancing density. Furthermore, the cross-linking of asphalt, SBR, SBS, SIS, 1901H, and X1825 forms a more efficient chemical-physical bonding structure, resulting in a more stable network structure.

[0048] Table 9 Performance test results of Comparative Examples 1-4

[0049] As can be seen from the results of Comparative Example 1 and Comparative Example 2 above, when excess alkali lime is added, the alkali lime (such as Na+, K+) can react with active aggregates (such as aggregates containing SiO2) for a long time to form an expansive gel, resulting in cracking, and the alkali content needs to be controlled. When no alkali lime is added, the cement stripping performance is reduced, and the possibility of water channeling is increased.

[0050] In addition, the present application replaces alkali lime with slaked lime or separately adds NaOH, which does not significantly improve the bonding strength, and even compared with Comparative Document 2, the bonding strength decreases.

[0051] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A modified asphalt composition, characterized in that: include: Asphalt, modified components, functional additives and fillers; In terms of mass percentage, the amount of asphalt is 35-55%; In parts by weight, the modified components include: 1 to 10 parts of SBR, 1 to 10 parts of SBS, 1 to 5 parts of SIS, 1 to 5 parts of thermoplastic rubber SAMYH-1901H, and 1 to 5 parts of soda lime.

2. The modified asphalt composition according to claim 1, characterized in that In parts by weight, the modified component further includes: 0.2 to 1 part of asphalt heat-resistant modifier.

3. The modified asphalt composition according to claim 1 or 2, characterized in that The asphalt is heavy traffic asphalt.

4. The modified asphalt composition according to any one of claims 1 to 3, characterized in that: The mass ratio of the asphalt, the modified component, the functional additive and the filler is (35-55): (5-33): (8-21): (20-30); the functional additive includes: rubber oil and / or tire rubber powder; and the filler is heavy calcium.

5. The modified asphalt composition according to claim 4, characterized in that In parts by weight, the functional additives include: 5 to 10 parts of rubber oil and 3 to 10 parts of tire rubber powder.

6. A waterproof coiled coating material, characterized in that: The modified asphalt composition comprises the modified asphalt composition according to any one of claims 1 to 5.

7. The method for preparing the waterproof coiled coating material according to claim 6, characterized in that: include: (1) Mix asphalt and rubber oil in a predetermined ratio, heat and stir to mix; (2) When the temperature rises to 130-180°C, add SBR, SBS, SIS and SAMYH-1901H and stir to mix; (3) Add soda lime and tire rubber powder, heat to above 180°C and stir to mix; (4) Add heavy calcium carbonate and stir to mix, then cool to 170-175°C.

8. The preparation method according to claim 7, characterized in that In step (1), the stirring rate is 400-600 r / min; In step (2), the stirring rate is 800-1200 r / min and the stirring time is 30-45 min; In step (3), the stirring rate is 1200~1500r / min, and the stirring time is 2.5~3h.

9. A waterproof roll, characterized in that: The waterproof roll material includes the waterproof roll material coating material according to claim 6.

10. Use of the modified asphalt composition according to any one of claims 1 to 5, or the waterproof membrane coating according to claim 6, in the preparation of one or more of a sealing layer, an adhesive layer, a protective layer or a waterproof layer.

Images