Modified asphalt coating material with aging resistance and mildew resistance and preparation method thereof

Abstract

The present application relates to waterproof material technical field, specifically to a kind of modified asphalt coating material with anti-aging, anti-mold performance and preparation method thereof, modified asphalt coating material includes the following weight percentage components raw materials: petroleum pitch 45%~75%, softening oil 7%~13%, high molecular polymer 3.5%~12%, activator 0.2%~1.0%, ultraviolet absorber 1%~3%, light shielding agent 0.1%~1.0%, free radical trapping agent 0.4%~1.0%, asphalt modifier 10%~15%, filling powder 15%~25%;High molecular polymer is the compound of SBS, SIS and SBR.The modified asphalt coating material prepared by the present application has excellent heat aging resistance, ultraviolet aging resistance and anti-mold performance.

Description

Technical Field

[0001] This invention relates to the field of waterproof materials technology, specifically to a modified bitumen coating material with aging resistance and anti-mildew properties and its preparation method. Background Technology

[0002] Polymer-modified bitumen waterproof membrane is a type of waterproof membrane made from high-quality road petroleum asphalt, softened oil, SBS (styrene-butadiene triblock copolymer), SIS (styrene-isoprene-styrene block copolymer), SBR (polystyrene-butadiene copolymer), and fillers as the base material, with strong and tough long-filament polyester fabric as the molding reinforcement material, and a PE film covering the surface as the surface isolation material.

[0003] Polymer-modified bitumen membranes possess excellent adhesion to substrates, high tensile strength, and significant elongation, leading to their widespread market application. They are also the most technologically mature and widely used waterproof membranes on the market to date. However, with the development of technology, the market has placed new demands on waterproof membranes, including requirements for lifespan comparable to that of buildings and ultra-long weather resistance.

[0004] Conventional polymer-modified bitumen membranes suffer from several drawbacks. First, their formulation design fails to consider weather resistance, resulting in a lack of inherent anti-aging properties. Second, the production process often employs high-temperature mixing methods, which damage the molecular structure of the modifiers under high temperatures, affecting the modification effect and leading to poor weather resistance in the finished product, thus failing to meet market demands. Furthermore, material aging can cause leaks in the entire waterproofing project. Additionally, prolonged exposure to a damp environment can lead to mold growth on the base material, ultimately severely impacting the building's lifespan. Summary of the Invention

[0005] To address the technical problems of poor aging resistance and easy mold growth in roll waterproofing materials, this invention provides a modified bitumen coating material with aging resistance and anti-mold properties, and its preparation method. The modified bitumen coating material has excellent heat aging resistance, UV aging resistance, and anti-mold properties.

[0006] In a first aspect, the present invention provides a modified asphalt coating material with anti-aging and anti-mold properties, comprising the following raw materials in weight percentages: 45%–75% petroleum asphalt, 7%–13% softening oil, 3.5%–12% polymer, 0.2%–1.0% activator, 1%–3% ultraviolet absorber, 0.1%–1.0% light shielding agent, 0.4%–1.0% free radical scavenger, 10%–15% asphalt modifier, and 15%–25% filler powder; the polymer is a compound of SBS, SIS, and SBR.

[0007] Furthermore, the petroleum asphalt is at least one of 70#, 90#, and 200# road petroleum asphalt. Its function is that the aforementioned petroleum asphalt has an excellent four-component structure and possesses natural water resistance, acid and alkali resistance, and durability.

[0008] Furthermore, the softening oil is a compound of naphthenic and aromatic oils. This helps improve the swelling efficiency of rubber molecules in the formulation system, thereby shortening the stirring time in the production process.

[0009] Furthermore, the activator is a rubber powder desulfurizer. The function of the activator is to break the carbon-sulfur bonds between rubber molecules, thereby reducing the swelling temperature of the rubber powder and increasing the activity of the rubber molecules.

[0010] Furthermore, the ultraviolet absorber is at least one of o-hydroxybenzophenone, o-hydroxybenzotriazole, triazine, and phenyl salicylate. The function of the ultraviolet absorber is to strongly and selectively absorb high-energy ultraviolet rays and convert the energy into heat or harmless low-energy radiation, thereby reducing the aging effect of ultraviolet rays on the modified asphalt coating.

[0011] Furthermore, the light-shielding agent is at least one of carbon black, zinc oxide, and titanium dioxide. The function of the light-shielding agent is to reflect and absorb ultraviolet light, thus shielding the coating material from ultraviolet light waves and protecting the material's internal structure from the effects of ultraviolet aging.

[0012] Furthermore, the free radical scavenger is at least one selected from (2,2,6,6-tetramethylpiperidine) benzoate, 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine) ester, tris(1,2,2,6-pentamethylpiperidinyl) phosphite, and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester. The free radical scavenger functions by capturing free radicals generated during the aging process of the material, transferring excited-state energy through multiple pathways, and preventing free radicals from further damaging the internal molecular structure of the material, thereby endowing the material with high optical stability.

[0013] Furthermore, the asphalt modifier is rubber tire powder or butyl rubber powder. The function of the asphalt modifier is to improve the heat resistance and aging resistance of the roll material, and increase the elasticity of the roll material coating, in conjunction with the activator for desulfurization, so as to facilitate production and reduce costs.

[0014] Secondly, the present invention provides a method for preparing a modified asphalt coating with aging resistance and anti-mildew properties, comprising the following steps:

[0015] S1. Add petroleum asphalt and softened oil into the reaction vessel according to the measured parts, stir and react, and the reaction temperature is 130-150℃.

[0016] S2. Slowly add the ultraviolet absorber, light shielding agent, and free radical scavenger into the stirred reactor and continue stirring.

[0017] S3. When the temperature of the reactor reaches 165-185℃, slowly add SBS, SIS, and SBR, start the grinding inside the reactor, and perform circulating grinding and stirring.

[0018] S4. Add activator to the reactor, slowly add asphalt modifier, and continue grinding and stirring at a constant temperature;

[0019] S5. Transfer the reacted material from the reactor to the powder mixing tank, start the mixer, slowly add the filler powder while mixing, and cool down to 160-180℃ while mixing. Continue mixing to obtain the modified asphalt coating material.

[0020] Furthermore, in step S1, the stirring frequency of the reactor is 20-30 Hz and the stirring time is 25-35 min. The purpose of stirring in step S1 is to remove the moisture from the base petroleum asphalt and to mix the base asphalt and softening oil evenly.

[0021] In step S2, the stirring frequency is 20-30Hz and the stirring time is 15-20min. The purpose of stirring in step S2 is to mix the ultraviolet light, light shielding agent and free radical scavenger evenly. The free radical scavenger can reduce the aging degree of the material under high temperature stirring environment by absorbing the free radicals generated during the material aging process.

[0022] In step S3, the stirring frequency is 30-50Hz and the stirring time is 15-30min. The purpose of stirring in step S3 is to effectively reduce the modification temperature conditions and improve the dispersion and swelling effect of the modifier by using the grinding and stirring composite material process, thereby promoting the formation of a three-dimensional network structure of polymer materials in the coating system.

[0023] In step S4, the grinding and stirring time is 2.0 to 3.0 hours. The purpose of stirring in step S4 is that the activator can act on the molecular structure of the asphalt modifier under relatively low temperature conditions, destroy the original carbon-sulfur bonds, form carbon-carbon single bonds, and thus trigger the low-temperature swelling of the asphalt modifier.

[0024] In step S5, the stirring frequency is 25-35Hz. The purpose of using a modified batching tank and a powder dispersion tank for batching production is to empty the modified batching tank as soon as possible after the base asphalt modification is completed before starting the next round of batching production, which can maximize production efficiency.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The present invention uses a compound of polymer SBS / SIS / SBR to maximize the advantages of polymer modified materials; among them, SBS and SIS ensure that the weather resistance and heat resistance of the coating material meet the design requirements, and SBR provides a reliable guarantee for the low-temperature flexibility of the material.

[0027] (2) The preparation method of the present invention adopts a low-temperature grinding and stirring composite batching method, which greatly improves the modification effect of the modifier and makes the performance of the coating system more stable.

[0028] (3) The present invention introduces ultraviolet absorbers, light shielding agents and free radical scavengers to slow down the aging of materials at each stage from the preparation of the coating to the use of the finished product. The three anti-aging agents with different working principles are used together to not only greatly eliminate the aging phenomenon in the preparation of the coating, but also greatly reduce the degree of natural environmental aging of the material during use.

[0029] (4) This invention can be applied to the anti-mildew treatment process of roll material base, which provides a guarantee for the anti-mildew effect of roll material base in long-term humid environment. The final product has excellent heat aging resistance, UV aging resistance and mildew resistance. The finished material can meet the same lifespan requirement as the building. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0031] Example 1

[0032] A modified asphalt coating material with aging resistance and anti-mildew properties comprises the following raw materials in weight percentages: 35% 70# petroleum asphalt, 15% 200# petroleum asphalt, 8% naphthenic oil, 3% aromatic oil, 5% SBS polymer, 3% SIS polymer, 3% SBR polymer, 0.2% rubber powder desulfurizer, 1.6% o-hydroxybenzophenone, 0.5% carbon black, 0.7% mixture of (2,2,6,6-tetramethylpiperidine) benzoate and tris(1,2,2,6-pentamethylpiperidinyl) phosphite, 10% rubber tire powder, and 15% talc.

[0033] Preparation methods include:

[0034] S1: Weigh out 70# petroleum asphalt, 200# petroleum asphalt, naphthenic oil and aromatic oil according to the measured parts and put them into the reaction vessel. The reaction temperature is 140℃, the stirring frequency of the reaction vessel is 25Hz, and the stirring time is 30min.

[0035] S2: Slowly add the mixture of o-hydroxybenzophenone, carbon black, benzoic acid (2,2,6,6-tetramethylpiperidine) ester and tris(1,2,2,6-pentamethylpiperidinyl) phosphite into a stirred reactor, and keep the stirring frequency of the reactor at 25 Hz for 15 min.

[0036] S3: When the reactor temperature rises to 170℃, slowly add SBS, SIS, and SBR, increase the reactor stirring frequency to 40Hz, stir for 25 minutes, then turn on the grinder and maintain the reaction temperature at 170℃. Circulate and grind for 1.0 h.

[0037] S4: Add rubber powder desulfurizer, and slowly add rubber tire powder while grinding and stirring, and continue grinding and stirring at a constant temperature for 2.5 hours;

[0038] S5: Transfer the reaction product from the reactor to a powder mixing tank, adjust the stirring frequency to 25Hz, slowly add the filler powder talc powder while stirring, and cool down to 170℃ while stirring. After dispersing at low speed for 50 minutes at this temperature, the modified asphalt coating material is obtained.

[0039] Example 2

[0040] A modified asphalt coating material with aging resistance and anti-mildew properties comprises the following raw materials in weight percentages: 30% 70# petroleum asphalt, 15% 90# petroleum asphalt, 7% naphthenic oil, 4% aromatic oil, 6% SBS polymer, 2% SIS polymer, 2% SBR polymer, 0.5% rubber powder desulfurizer, 1.0% mixture of o-hydroxybenzotriazole and phenyl salicylate, 0.7% mixture of carbon black and zinc oxide, 0.8% mixture of 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine ester) and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester, 12% rubber tire powder, and 19% talc powder.

[0041] Preparation methods include:

[0042] S1: Weigh out 70# petroleum asphalt, 90# petroleum asphalt, naphthenic oil and aromatic oil according to the measured parts and put them into the reaction vessel. The reaction temperature is 140℃, the stirring frequency of the reaction vessel is 25Hz, and the stirring time is 30min.

[0043] S2: Slowly add the mixture of o-hydroxybenzotriazole and phenyl salicylate, the mixture of carbon black and zinc oxide, and the mixture of 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine ester) and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester into a stirred reactor. Maintain the stirring frequency of the reactor at 25 Hz and stir rapidly for 15 min.

[0044] S3: When the reactor temperature rises to 170℃, slowly add SBS, SIS, and SBR, increase the reactor stirring frequency to 40Hz, stir for 25 minutes, then turn on the grinder and maintain the reaction temperature at 170℃. Circulate and grind for 1.0 h.

[0045] S4: Add rubber powder desulfurizer, and slowly add rubber tire powder while grinding and stirring, and continue grinding and stirring at a constant temperature for 2.5 hours;

[0046] S5: Transfer the reaction product from the reactor to a powder mixing tank, adjust the stirring frequency to 25Hz, slowly add the filler powder while stirring, and cool down to 170℃ while stirring. After dispersing at low speed for 50 minutes at this temperature, the modified asphalt coating material is obtained.

[0047] Example 3

[0048] A modified asphalt coating material with anti-aging and anti-mildew properties comprises the following raw materials in weight percentages: 45% 70# petroleum asphalt, 11% 200# petroleum asphalt, 5% naphthenic oil, 3% aromatic oil, 3% SBS polymer, 4% SIS polymer, 2% SBR polymer, 0.2% rubber powder desulfurizer, 0.5% mixture of triazine and phenyl salicylate, 0.3% mixture of carbon black and titanium dioxide, 1.0% mixture of 4-methanesulfonamide (2,2,6,6-tetramethylpiperidinyl ester) and tris(1,2,2,6-pentamethylpiperidinyl) phosphite, 10% butyl rubber powder, and 15% talc powder.

[0049] Preparation methods include:

[0050] S1: Weigh out 70# petroleum asphalt, 200# petroleum asphalt, naphthenic oil and aromatic oil according to the measured parts and put them into the reaction vessel. The reaction temperature is 150℃, the stirring frequency of the reaction vessel is 30Hz, and the stirring time is 25min.

[0051] S2: Slowly add the mixture of triazine and phenyl salicylate, the mixture of carbon black and titanium dioxide, and the mixture of 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidin ester) and tris(1,2,2,6-pentamethylpiperidinyl) phosphite into a stirred reactor. Maintain the stirring frequency of the reactor at 30 Hz and stir rapidly for 15 min.

[0052] S3: When the reactor temperature rises to 180℃, slowly add SBS, SIS, and SBR, increase the reactor stirring frequency to 30Hz, stir for 15 minutes, then turn on the grinder and maintain the reaction temperature at 180℃. Circulate and grind for 1.0 h.

[0053] S4: Add butyl rubber powder, and slowly add asphalt modifier while grinding and stirring, and continue grinding and stirring at a constant temperature for 2.0h;

[0054] S5: Transfer the product from the reaction vessel to a powder mixing tank, adjust the stirring frequency to 35Hz, slowly add talc powder while stirring, and cool down to 180℃ while stirring. After dispersing at low speed for 50 minutes at this temperature, the modified asphalt coating material is obtained.

[0055] Comparative Example 1

[0056] The difference between Comparative Example 1 and Example 1 is that only SBS was used as the polymer modifier.

[0057] Comparative Example 2

[0058] The difference between Comparative Example 2 and Example 1 is that no ultraviolet absorber was used.

[0059] Comparative Example 3

[0060] The difference between Comparative Example 3 and Example 1 is that no light-shielding agent was used.

[0061] Comparative Example 4

[0062] The difference between Comparative Example 4 and Example 1 is that no free radical scavenger was used.

[0063] Comparative Example 5

[0064] The difference between Comparative Example 5 and Example 3 is that no ultraviolet absorber, light shielding agent and free radical scavenger were used.

[0065] Table 1 shows the performance test results of the modified bitumen coating samples prepared in each embodiment and comparative example.

[0066] Table 1. Performance test results of the modified asphalt coating samples prepared in the examples and comparative examples.

[0067]

[0068]

[0069] Example 4

[0070] A modified asphalt coating material with aging resistance and anti-mildew properties comprises the following raw materials in weight percentages: 35% 70# petroleum asphalt, 35% 200# petroleum asphalt, 8% naphthenic oil, 5% aromatic oil, 0.5% SBS polymer, 1.5% SIS polymer, 1.5% SBR polymer, 1.0% rubber powder desulfurizer, 3.0% o-hydroxybenzophenone, 0.1% carbon black, 0.4% mixture of (2,2,6,6-tetramethylpiperidine) benzoate and tris(1,2,2,6-pentamethylpiperidinyl) phosphite, 15% rubber tire powder, and 25% talc.

[0071] S1: Weigh out 70# petroleum asphalt, 200# petroleum asphalt, naphthenic oil and aromatic oil according to the measured parts and put them into the reaction vessel. The reaction temperature is 130℃, the stirring frequency of the reaction vessel is 20Hz, and the stirring time is 35min.

[0072] S2: Slowly add the mixture of o-hydroxybenzophenone, carbon black, benzoic acid (2,2,6,6-tetramethylpiperidine) ester and tris(1,2,2,6-pentamethylpiperidinyl) phosphite into a stirred reactor, and keep the stirring frequency of the reactor at 20 Hz for 10 min.

[0073] S3: When the reactor temperature rises to 165℃, slowly add SBS, SIS, and SBR, increase the reactor stirring frequency to 50Hz, stir for 30 minutes, then turn on the grinder and maintain the reaction temperature at 170℃. Circulate and grind for 1.0 h.

[0074] S4: Add rubber powder desulfurizer, and slowly add rubber tire powder while grinding and stirring, and continue grinding and stirring at a constant temperature for 2.0h;

[0075] S5: Transfer the reaction product from the reactor to a powder mixing tank, adjust the stirring frequency to 30Hz, slowly add the filler powder talc powder while stirring, and cool down to 170℃ while stirring. After dispersing at low speed for 50 minutes at this temperature, the modified asphalt coating material is obtained.

[0076] Example 5

[0077] A modified asphalt coating material with aging resistance and anti-mildew properties comprises the following raw materials in weight percentages: 30% 70# petroleum asphalt, 15% 90# petroleum asphalt, 3% naphthenic oil, 4% aromatic oil, 6% SBS polymer, 3% SIS polymer, 3% SBR polymer, 0.5% rubber powder desulfurizer, 1.0% mixture of o-hydroxybenzotriazole and phenyl salicylate, 1.0% mixture of carbon black and zinc oxide, 0.8% mixture of 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine ester) and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester, 12% rubber tire powder, and 19% talc powder.

[0078] Preparation methods include:

[0079] S1: Weigh out 70# petroleum asphalt, 90# petroleum asphalt, naphthenic oil and aromatic oil according to the measured parts and put them into the reaction vessel. The reaction temperature is 140℃, the stirring frequency of the reaction vessel is 25Hz, and the stirring time is 30min.

[0080] S2: Slowly add the mixture of o-hydroxybenzotriazole and phenyl salicylate, the mixture of carbon black and zinc oxide, and the mixture of 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine ester) and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester into a stirred reactor. Maintain the stirring frequency of the reactor at 25 Hz and stir rapidly for 15 min.

[0081] S3: When the reactor temperature rises to 185℃, slowly add SBS, SIS, and SBR, increase the reactor stirring frequency to 40Hz, stir for 25 minutes, then turn on the grinder and maintain the reaction temperature at 170℃. Circulate and grind for 1.0 h.

[0082] S4: Add rubber powder desulfurizer, and slowly add rubber tire powder while grinding and stirring, and continue grinding and stirring at a constant temperature for 2.5 hours;

[0083] S5: Transfer the reaction product from the reactor to a powder mixing tank, adjust the stirring frequency to 25Hz, slowly add the filler powder while stirring, and cool down to 170℃ while stirring. After dispersing at low speed for 50 minutes at this temperature, the modified asphalt coating material is obtained.

[0084] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention.

Claims

1. A modified asphalt coating material with anti-aging and anti-mildew properties, characterized in that, It is composed of the following raw materials in weight percentages: petroleum asphalt 45%–75%, softening oil 7%–13%, polymer 3.5%–12%, activator 0.2%–1.0%, ultraviolet absorber 1%–3%, light shielding agent 0.1%–1.0%, free radical scavenger 0.4%–1.0%, asphalt modifier 10%–15%, and filler powder 15%–25%; the sum of the amounts of all components is 100%; the polymer is a compound of SBS, SIS, and SBR. The modified asphalt coating material with aging resistance and antifungal properties is prepared by the following method: S1. Add petroleum asphalt and softened oil into the reaction vessel according to the measured parts, stir and react, and the reaction temperature is 130-150℃. S2. Add the ultraviolet absorber, light shielding agent, and free radical scavenger into the stirred reactor and continue stirring. S3. When the temperature of the reactor reaches 165-185℃, add SBS, SIS, and SBR, start the grinding inside the reactor, and perform circulating grinding and stirring. S4. Add activator and asphalt modifier to the reactor, and continue grinding and stirring at a constant temperature. S5. Transfer the material after reaction in the reactor to the powder mixing tank, start stirring, add filler powder while stirring, and cool down to 160-180℃ while stirring. After continuing to stir, the modified asphalt coating material is obtained. The ultraviolet absorber is at least one of o-hydroxybenzophenone, o-hydroxybenzotriazole, triazine, and phenyl salicylate; the light shielding agent is at least one of carbon black, zinc oxide, and titanium dioxide. The light-shielding agent is at least one of carbon black, zinc oxide, and titanium dioxide; The free radical scavenger is at least one of (2,2,6,6-tetramethylpiperidine) benzoate, 4-p-methylsulfonamide (2,2,6,6-tetramethylpiperidine) ester, and 3,5-di-tert-butyl-4-hydroxypropionic acid (2,2,6,6-tetramethylpiperidine) ester.

2. The modified asphalt coating material with aging resistance and antifungal properties as described in claim 1, characterized in that, Petroleum asphalt is at least one of 70#, 90#, and 200# road petroleum asphalt.

3. The modified asphalt coating material with aging resistance and antifungal properties as described in claim 1, characterized in that, Softening oil is a compound of naphthenic oil and aromatic oil.

4. The modified asphalt coating material with aging resistance and antifungal properties as described in claim 1, characterized in that, The activator is a rubber powder desulfurizer.

5. The modified asphalt coating material with aging resistance and antifungal properties as described in claim 1, characterized in that, The asphalt modifier is rubber tire powder or butyl rubber powder.

6. The modified asphalt coating material with aging resistance and antifungal properties as described in claim 1, characterized in that, In step S1, the stirring frequency of the reactor is 20-30 Hz and the stirring time is 25-35 min; in step S2, the stirring frequency is 20-30 Hz and the stirring time is 15-20 min; in step S3, the stirring frequency is 30-50 Hz and the stirring time is 15-30 min; in step S4, the grinding and stirring time is 2.0-3.0 h; in step S5, the stirring frequency is 25-35 Hz.

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