Flame-retardant spraying quick-setting rubber asphalt waterproof coating and preparation method thereof

Abstract

The invention discloses a flame-retardant spray-quick-setting rubber asphalt waterproof coating and a preparation method thereof, and relates to the field of asphalt, and the flame-retardant spray-quick-setting rubber asphalt waterproof coating comprises the following raw materials by weight: 40-80 parts of asphalt; 20-40 parts of modified styrene butadiene rubber; 2 to 10 parts of nano diamond; 1-3 parts of a thickening agent; 0.1 to 0.5 part of a defoaming agent; 0.1 to 0.5 part of a dispersant; 0.1 to 0.5 part of an anti-aging agent; the modified styrene-butadiene rubber is prepared from styrene-butadiene rubber, peanut shell powder, phenol, hydrochloric acid, sodium hydroxide and formaldehyde. The flame retardant property of the asphalt waterproof coating is improved.

Description

Technical Field

[0001] The invention relates to the field of asphalt, in particular to a flame retardant spray quick-setting rubber asphalt waterproof coating and a preparation method thereof. Background Art

[0002] The commonly used waterproof coatings on the market currently include polyurethane waterproof coatings, acrylic waterproof coatings, epoxy resin waterproof coatings and other types. They have good weather resistance and waterproof properties; however, they perform poorly in terms of fire safety, especially in high temperature environments, they are easy to burn, release toxic gases, and cause safety hazards.

[0003] Although existing waterproof materials have undergone many improvements, they still generally have poor fire resistance. Especially when a fire occurs, traditional waterproof materials not only cannot prevent the spread of the fire, but may become a combustion-promoting substance, increasing the risk of fire. Summary of the invention

[0004] In order to improve the flame retardant properties of rubber asphalt waterproof coatings, the present application provides a flame retardant spray quick-setting rubber asphalt waterproof coating and a preparation method thereof.

[0005] In the first aspect, the flame retardant spray quick-setting rubber asphalt waterproof coating provided by the present application adopts the following technical solution: A flame retardant spray quick-setting rubber asphalt waterproof coating comprises the following raw materials in parts by weight: 40-80 parts of asphalt; 20-40 parts of modified styrene-butadiene rubber; 2-10 parts of nano-diamond; 1-3 parts of thickener; 0.1-0.5 parts of defoamer; 0.1-0.5 parts of dispersant; 0.1-0.5 parts of anti-aging agent; the modified styrene-butadiene rubber comprises styrene-butadiene rubber, peanut shell powder, phenol, hydrochloric acid, sodium hydroxide and formaldehyde.

[0006] By adopting the above technical scheme, the present application modifies styrene butadiene rubber, the modified styrene butadiene rubber and nano-diamonds form intermolecular forces, the modified styrene butadiene rubber and nano-diamonds are connected together to enhance the dispersion performance of the flame retardant in the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating, so that the nano-diamonds are fully integrated with the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating, and then under the action of the nano-diamonds, the coating after spraying the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating provided by the present invention can effectively exert flame retardant properties, thereby meeting the fire protection requirements of some special buildings.

[0007] Preferably, the preparation method of the modified styrene-butadiene rubber is as follows: 10-30 parts by weight of peanut shell powder are mixed with 20-60 parts by weight of phenol and 2-8 parts by weight of hydrochloric acid, and the mixture is heated and stirred; after cooling, sodium hydroxide is added to adjust to neutrality; 10-20 parts by weight of formaldehyde is added, the mixture is heated and reacted; after cooling, 20-40 parts by weight of styrene-butadiene rubber is added, the mixture is mixed and stirred to obtain the modified styrene-butadiene rubber.

[0008] By adopting the above-mentioned technical scheme, the present application modifies styrene-butadiene rubber. The lignin content in peanut shell powder is high, and the blending system of peanut shell powder and phenol with nitrile rubber has good fluidity, which promotes the uniform distribution of peanut shell powder in styrene-butadiene rubber, enhances the toughness of styrene-butadiene rubber, and makes styrene-butadiene rubber have a uniform blasthole structure, thereby further improving the heat resistance and fire resistance of asphalt.

[0009] Preferably, the weight ratio of the peanut shell powder, phenol, formaldehyde and styrene-butadiene rubber is 1:(1.2-1.8):(0.8-0.9):(1.6-1.8).

[0010] By adopting the above technical scheme, when peanut shell powder, phenol, formaldehyde and styrene-butadiene rubber are in a specific weight ratio, the four work together to produce a partially open-pore structure in the styrene-butadiene rubber, thereby reducing the closed-pore rate of the styrene-butadiene rubber, forming a phenolic resin network and improving the ability to form a carbon layer to improve the heat-resistant and flame-retardant properties of asphalt.

[0011] Preferably, the nanodiamond is a modified nanodiamond, and the preparation method of the modified nanodiamond is: 5-15 parts by weight of petroleum ether and 1-3 parts by weight of HT-5168 dispersant are mixed and stirred, and then 40-60 parts by weight of nanodiamond and 3-9 parts by weight of silane coupling agent are added, ultrasonic dispersion vibration is performed, and vacuum drying is performed after heating in a water bath to obtain the modified nanodiamond.

[0012] By adopting the above technical scheme, the present application modifies the surface of nanodiamonds. Petroleum ether has olefins and better viscosity, so that nanodiamonds have a higher active specific surface area, so that the modified nanodiamonds can be effectively dispersed evenly in asphalt, filling the gap between asphalt and rubber, making the waterproof coating film denser, and further improving the adhesion and salt resistance of the coating.

[0013] Preferably, the weight ratio of the nano-diamond, petroleum ether and silane coupling agent is (5.2-5.6):1:(0.36-0.52).

[0014] By adopting the above technical solution, when nanodiamond, petroleum ether and silane coupling agent are in a specific weight ratio, the silane coupling agent forms a siloxane layer on the surface of the nanodiamond, which can isolate oxygen, slow down the burning speed of asphalt, and improve the flame retardant properties of asphalt.

[0015] Preferably, the weight ratio of the modified styrene-butadiene rubber, modified nano-diamond and asphalt is (0.48-0.7):(0.12-0.16):1.

[0016] By adopting the above technical scheme, when the modified styrene butadiene rubber, modified nanodiamond and asphalt are in a specific weight ratio, the modified styrene butadiene rubber can improve the adhesion and heat resistance of the asphalt to the base layer, and the modified nanodiamond forms a carbon layer to improve the flame retardant properties of the asphalt.

[0017] Preferably, the particle size of the nanodiamond is in the range of 40-60 mesh.

[0018] By adopting the above technical solution, nanodiamonds with a suitable particle size range can be effectively dispersed evenly in the asphalt, filling the gap between the asphalt and the rubber, making the waterproof coating film denser, and further improving the adhesion and salt resistance of the coating.

[0019] Preferably, the thickener comprises one of hydroxyethyl cellulose and carboxymethyl cellulose.

[0020] By adopting the above technical scheme, a suitable toughening agent is selected whose molecular chain contains active groups that can react with high molecular polymers. It can form a network structure, increase a part of flexible chains, reduce the brittleness of asphalt, and increase toughness without affecting other properties of the waterproof coating, thereby improving the salt resistance of the waterproof coating.

[0021] Preferably, the dispersant includes one of sodium dodecylbenzenesulfonate and hexadecyltrimethylammonium bromide.

[0022] By adopting the above technical solution and selecting a suitable dispersant, each component in the system is evenly dispersed in water to form a stable suspension, thereby avoiding flocculation and stratification.

[0023] In the second aspect, the present application provides a method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating using the following technical solution: A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating comprises the following steps: mixing asphalt, modified styrene-butadiene rubber, nano-diamond, a thickener, a defoamer, a dispersant and an anti-aging agent to obtain the flame retardant spray quick-setting rubber asphalt waterproof coating.

[0024] By adopting the above technical solution, In summary, this application has the following beneficial technical effects: 1. The present application modifies styrene butadiene rubber, and the modified styrene butadiene rubber and nano-diamonds form intermolecular forces. The modified styrene butadiene rubber and nano-diamonds are connected together to enhance the dispersion performance of the flame retardant in the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating, so that the nano-diamonds are fully integrated with the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating. Under the action of the nano-diamonds, the coating of the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating provided by the present invention can effectively exert flame retardant properties after spraying, thereby meeting the fire protection requirements of some special buildings.

[0025] 1. The present application modifies the surface of nanodiamonds. Petroleum ether has olefins and better viscosity, which makes the nanodiamonds have a higher active specific surface area, so that the modified nanodiamonds can be effectively dispersed evenly in the asphalt, filling the gap between the asphalt and the rubber, making the waterproof coating film denser, and further improving the adhesion and salt resistance of the coating.

[0026] 2. When the modified styrene-butadiene rubber, modified nano-diamond and asphalt are in a specific weight ratio, the modified styrene-butadiene rubber can improve the adhesion and heat resistance of the asphalt to the base layer, and the modified nano-diamond forms a carbon layer to improve the flame retardant properties of the asphalt. DETAILED DESCRIPTION

[0027] The present application is further described in detail below with reference to examples and comparative examples. Example

[0028] Example 1 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating comprises the following steps: 40kg asphalt, 20kg modified styrene-butadiene rubber, 2kg nano-diamond, 1kg hydroxyethyl cellulose thickener, 0.1kg dimethyl silicone defoamer, 0.1kg hexadecyl trimethyl ammonium bromide dispersant, and 0.1kg tea polyphenol anti-aging agent were added to a high-speed agitator and mixed and stirred for 30 minutes at a temperature of 140°C and a speed of 600rpm to obtain a flame-retardant spray quick-setting rubber asphalt waterproof coating. Asphalt selection: Foshan Zhongyou Gaofu Petroleum Co., Ltd.; The preparation method of the modified styrene-butadiene rubber is as follows: 10 kg of peanut shell powder with a particle size of 60 meshes is mixed with 20 kg of phenol and 2 kg of hydrochloric acid, heated to 130°C and stirred for 60 minutes, cooled to room temperature, sodium hydroxide is added to adjust to neutrality, 10 kg of formaldehyde is added, the mixture is heated to 80°C and reacted for 30 minutes, cooled to room temperature, 20 kg of styrene-butadiene rubber is added, and the mixture is stirred for 30 minutes to obtain the modified styrene-butadiene rubber.

[0029] Example 2 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating comprises the following steps: 80kg asphalt, 40kg modified styrene-butadiene rubber, 10kg nano-diamond, 3kg carboxymethyl cellulose thickener, 0.5kg dimethyl silicone defoamer, 0.5kg sodium dodecylbenzene sulfonate dispersant, and 0.5kg tea polyphenol anti-aging agent were added into a high-speed agitator and mixed and stirred for 30 minutes at a temperature of 140°C and a speed of 600rpm to obtain a flame-retardant spray quick-setting rubber asphalt waterproof coating. Asphalt selection: Foshan Zhongyou Gaofu Petroleum Co., Ltd.; The preparation method of the modified styrene-butadiene rubber is as follows: 10 kg of peanut shell powder with a particle size of 40 meshes is mixed with 20 kg of phenol and 2 kg of hydrochloric acid, heated to 130°C and stirred for 60 minutes, cooled to room temperature, sodium hydroxide is added to adjust to neutrality, 10 kg of formaldehyde is added, the mixture is heated to 80°C and reacted for 30 minutes, cooled to room temperature, 20 kg of styrene-butadiene rubber is added, and the mixture is stirred for 30 minutes to obtain the modified styrene-butadiene rubber.

[0030] Example 3 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating comprises the following steps: 60kg asphalt, 30kg modified styrene-butadiene rubber, 6kg nano-diamond, 2kg hydroxyethyl cellulose thickener, 0.3kg dimethyl silicone defoamer, 0.3kg sodium dodecylbenzene sulfonate dispersant, and 0.3kg tea polyphenol anti-aging agent were added into a high-speed agitator and mixed and stirred for 30 minutes at a temperature of 140°C and a speed of 600rpm to obtain a flame-retardant spray quick-setting rubber asphalt waterproof coating. Asphalt selection: Foshan Zhongyou Gaofu Petroleum Co., Ltd.; The preparation method of the modified styrene-butadiene rubber is as follows: 10 kg of peanut shell powder with a particle size of 60 meshes is mixed with 20 kg of phenol and 2 kg of hydrochloric acid, heated to 130°C and stirred for 60 minutes, cooled to room temperature, sodium hydroxide is added to adjust to neutrality, 10 kg of formaldehyde is added, the mixture is heated to 80°C and reacted for 30 minutes, cooled to room temperature, 20 kg of styrene-butadiene rubber is added, and the mixture is stirred for 30 minutes to obtain the modified styrene-butadiene rubber.

[0031] Example 4 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that: a method for preparing modified styrene-butadiene rubber is as follows: 30 kg of peanut shell powder with a particle size of 60 mesh is mixed with 60 kg of phenol and 8 kg of hydrochloric acid, heated to 130° C. and stirred for 60 minutes, cooled to room temperature, sodium hydroxide is added to adjust to neutrality, 20 kg of formaldehyde is added, the mixture is heated to 80° C. and reacted for 30 minutes, cooled to room temperature, 40 kg of styrene-butadiene rubber is added, and the mixture is stirred for 30 minutes to obtain modified styrene-butadiene rubber.

[0032] Example 5 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that: in the process of preparing modified styrene-butadiene rubber, the input amount of peanut shell powder is 20 kg, the input amount of phenol is 24 kg, the input amount of formaldehyde is 16 kg, and the input amount of styrene-butadiene rubber is 32 kg.

[0033] Example 6 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that: in the process of preparing modified styrene-butadiene rubber, the input amount of peanut shell powder is 20 kg, the input amount of phenol is 36 kg, the input amount of formaldehyde is 18 kg, and the input amount of styrene-butadiene rubber is 36 kg.

[0034] Example 7 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 6 in that an equal amount of nanodiamonds is replaced by modified nanodiamonds. The preparation method of the modified nanodiamonds is as follows: 5 kg of petroleum ether and 1 kg of HT-5168 dispersant are mixed and stirred for 5 minutes, and then 40 kg of nanodiamonds and 3 kg of KH560 silane coupling agent are added, ultrasonically dispersed and vibrated for 15 minutes, and then heated in a water bath at a temperature of 90° C. and vacuum dried for 6 hours to obtain modified nanodiamonds.

[0035] Example 8 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 6 in that an equal amount of nanodiamonds is replaced by modified nanodiamonds. The preparation method of the modified nanodiamonds is as follows: 15 kg of petroleum ether and 3 kg of HT-5168 dispersant are mixed and stirred for 5 minutes, and then 60 kg of nanodiamonds and 9 kg of KH560 silane coupling agent are added, ultrasonically dispersed and vibrated for 15 minutes, and then heated in a water bath at a temperature of 90° C. and vacuum dried for 6 hours to obtain modified nanodiamonds.

[0036] Example 9 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 8 in that the input amount of nanodiamond is 52 kg, the input amount of petroleum ether is 10 kg, and the input amount of silane coupling agent is 3.6 kg.

[0037] Example 10 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 8 in that the input amount of nanodiamond is 56 kg, the input amount of petroleum ether is 10 kg, and the input amount of silane coupling agent is 5.2 kg.

[0038] Embodiment 11 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 10 in that the input amount of modified styrene-butadiene rubber is 24 kg, the input amount of modified nano-diamond is 6 kg, and the input amount of asphalt is 50 kg.

[0039] Example 12 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 10 in that the input amount of modified styrene-butadiene rubber is 35 kg, the input amount of modified nano-diamond is 8 kg, and the input amount of asphalt is 50 kg.

[0040] Comparative Example Comparative Example 1 A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that an equal amount of modified styrene butadiene rubber is replaced with styrene butadiene rubber.

[0041] Comparative Example 2 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that an equal amount of nano-diamonds is replaced by nano-silicon dioxide.

[0042] Comparative Example 3 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that an equal amount of modified styrene-butadiene rubber is replaced by nitrile rubber.

[0043] Comparative Example 4 A method for preparing a flame-retardant spray quick-setting rubber asphalt waterproof coating, which is different from Example 3 in that an equal amount of modified styrene-butadiene rubber is replaced with ethylene-propylene-diene rubber.

[0044] Performance testing: Heat resistance: According to JC / T2016-20014 "Spraying Quick-setting Rubber Asphalt Waterproof Coating", each embodiment and comparative example was tested to see if there was any flow, sliding or dripping within 5 hours at a temperature of 160°C; Flame retardant grade: The flame retardant grade of each embodiment and comparative example was tested according to GB8624-2012; Salt resistance: The salt resistance of each embodiment and comparative example was tested according to JC / T 2428-2017 "Non-curing rubber asphalt waterproof coating"; According to the data comparison of Examples 1-3 and Comparative Examples 1-4, the present application modifies styrene-butadiene rubber, the modified styrene-butadiene rubber and nano-diamonds form intermolecular forces, the modified styrene-butadiene rubber and nano-diamonds are connected together to enhance the dispersion performance of the flame retardant in the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating, so that the nano-diamonds are fully integrated with the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating, and then under the action of the nano-diamonds, the coating of the spray-coated quick-setting rubber asphalt flame-retardant waterproof coating provided by the present invention after spraying can effectively exert flame retardant properties, thereby meeting the fire protection requirements of some special buildings; the peanut shell powder has a high lignin content, and the blending system of the peanut shell powder and phenol and nitrile rubber has good fluidity, which promotes the uniform distribution of the peanut shell powder in the styrene-butadiene rubber, enhances the toughness of the styrene-butadiene rubber, and makes the styrene-butadiene rubber have a uniform blasthole structure, thereby further improving the heat resistance and fire resistance of the asphalt.

[0045] According to the data comparison of Examples 3-6, when peanut shell powder, phenol, formaldehyde and styrene-butadiene rubber are in a specific weight ratio, the four work together to give the styrene-butadiene rubber a partially open-pore structure, reduce the closed-pore rate of the styrene-butadiene rubber, form a phenolic resin network and enhance the ability to form a carbon layer to improve the heat and flame retardant properties of the asphalt.

[0046] According to the data comparison of Examples 6-8, the present application modifies the surface of nanodiamonds, and petroleum ether has olefins and better viscosity, so that the nanodiamonds have a higher active specific surface area, so that the modified nanodiamonds can be effectively dispersed evenly in the asphalt, filling the gap between the asphalt and the rubber, making the waterproof coating film denser, and further improving the adhesion and salt resistance of the coating.

[0047] According to the data comparison of Examples 8-10, when nanodiamond, petroleum ether and silane coupling agent are in a specific weight ratio, the silane coupling agent forms a siloxane layer on the surface of the nanodiamond, which can isolate oxygen, slow down the burning speed of asphalt, and improve the flame retardant properties of asphalt.

[0048] According to the data comparison of Examples 10-12, when the modified styrene-butadiene rubber, modified nano-diamond and asphalt are in a specific weight ratio, the modified styrene-butadiene rubber can improve the adhesion and heat resistance of the asphalt to the base layer, and the modified nano-diamond forms a carbon layer to improve the flame retardant properties of the asphalt.

[0049] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A flame retardant spray quick-setting rubber asphalt waterproof coating, characterized in that: The invention comprises the following raw materials in parts by weight: 40-80 parts of asphalt, 20-40 parts of modified styrene-butadiene rubber, 2-10 parts of nano-diamond, 1-3 parts of thickener, 0.1-0.5 parts of defoamer, 0.1-0.5 parts of dispersant and 0.1-0.5 parts of anti-aging agent. The modified styrene-butadiene rubber comprises styrene-butadiene rubber, peanut shell powder, phenol, hydrochloric acid, sodium hydroxide and formaldehyde.

2. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 1, characterized in that: The preparation method of the modified styrene-butadiene rubber comprises: mixing 10-30 parts by weight of peanut shell powder, 20-60 parts by weight of phenol and 2-8 parts by weight of hydrochloric acid, heating and stirring, cooling and adding sodium hydroxide to adjust to neutrality, then adding 10-20 parts by weight of formaldehyde, mixing and heating for reaction, cooling and adding 20-40 parts by weight of styrene-butadiene rubber, mixing and stirring to obtain the modified styrene-butadiene rubber.

3. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 2, characterized in that: The weight ratio of the peanut shell powder, phenol, formaldehyde and styrene-butadiene rubber is 1: (1.2-1.8): (0.8-0.9): (1.6-1.8).

4. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 1, characterized in that: The nano-diamond is a modified nano-diamond. The preparation method of the modified nano-diamond is as follows: 5-15 parts by weight of petroleum ether and 1-3 parts by weight of HT-5168 dispersant are mixed and stirred, and then 40-60 parts by weight of nano-diamond and 3-9 parts by weight of silane coupling agent are added, ultrasonic dispersion and vibration are performed, and vacuum drying is performed after water bath heating to obtain the modified nano-diamond.

5. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 4, characterized in that: The weight ratio of the nano-diamond, petroleum ether and silane coupling agent is (5.2-5.6):1:(0.36-0.52).

6. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 4, characterized in that: The weight ratio of the modified styrene-butadiene rubber, modified nano-diamond and asphalt is (0.48-0.7): (0.12-0.16):

1.

7. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 1, characterized in that: The particle size of the nano-diamond is in the range of 40-60 meshes.

8. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 1, characterized in that: The thickener includes one of hydroxyethyl cellulose and carboxymethyl cellulose.

9. The flame retardant spray quick-setting rubber asphalt waterproof coating according to claim 1, characterized in that: The dispersant includes one of sodium dodecylbenzene sulfonate and hexadecyltrimethylammonium bromide.

10. A method for preparing a flame retardant spray quick-setting rubber asphalt waterproof coating, characterized in that: The method for preparing the flame retardant spray quick-setting rubber asphalt waterproof coating according to any one of claims 1 to 9 comprises the following steps: mixing asphalt, modified styrene-butadiene rubber, nanodiamond, thickener, defoamer, dispersant and anti-aging agent to obtain the flame retardant spray quick-setting rubber asphalt waterproof coating.

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