A non-cured waterproof coating composition, a non-cured waterproof coating, and a preparation method and application thereof

Abstract

The application relates to the technical field of building waterproof materials, and discloses a composition for non-cured waterproof paint, non-cured waterproof paint and a preparation method and application thereof. The composition contains softening oil, asphalt, rubber modifier, antioxidant, silane coupling agent, rheological agent, inorganic filler and high-temperature auxiliary agent with a dropping point not lower than 105 DEG C; the softening oil has a flash point of 250-280 DEG C and a volatile content of less than or equal to 1 wt%; the asphalt has a penetration of 60-100 1 / 10 mm and a volatile content of less than or equal to 0.5 wt%. The non-cured waterproof paint not only solves the problems of excessive volatile organic compounds generated in the construction process, which damages the health of construction personnel and pollutes the environment, and a series of safety and energy consumption problems caused by high-temperature heating in the hot melting process, but also improves the coating area of the paint, improves the construction efficiency and reduces the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building waterproof materials, in particular to a non-curing waterproof coating composition, a non-curing waterproof coating and a preparation method and application thereof. BACKGROUND

[0002] At present, non-curing rubber asphalt waterproof coating on the market mainly takes asphalt as the main body, various elastomers, plastics and the like are used to modify it, so that it has the characteristics of not curing after long-term contact with air and always maintaining viscous gum after construction; the non-curing rubber asphalt waterproof coating has strong adhesion, and after being subjected to external forces, the material can reduce stress through deformation; it has good flexibility and high elongation, and can adapt to base deformation; it has strong self-healing property, and can repair itself after the waterproof layer is damaged to maintain the integrity of the waterproof layer; it can be used simultaneously with other waterproof materials to form a composite waterproof system and improve waterproof effect.

[0003] However, in the formulation system of the non-curing rubber asphalt waterproof coating, a large amount of asphalt and softening oil with high volatility are contained, and a large amount of high-temperature volatile matter is generated in the construction process of heating and melting at a high temperature of 150℃ or higher, which pollutes the environment and endangers the health and safety of construction personnel; at the same time, in the construction process of the traditional non-curing coating, the temperature gradually decreases, which leads to high viscosity and poor flowability of the coating, large unit area dosage, low construction efficiency and high material cost.

[0004] CN115851131A discloses an environmentally friendly low-temperature spray type hot melt non-curing rubber asphalt waterproof coating and a preparation method thereof. The non-curing rubber asphalt waterproof coating comprises the following components in parts by weight: asphalt 100 parts, SBS rubber 3-7 parts, SBR rubber 10-20 parts, softening agent 35-50 parts, filler 45-52 parts, heat-resistant modifier 2-4 parts, and tackifying resin 3-7 parts. The asphalt is 70# petroleum asphalt and / or 90# petroleum asphalt. The softening agent is at least one of alkane oil, dialkyl phthalate, vaseline, microcrystalline wax and polyolefin material. The coating provided by the prior art has conventional properties such as long-lasting non-drying and good creep resistance, and also has special properties such as high heat resistance, low viscosity, low-temperature spray or blade coating construction, energy saving and environmental protection, and meeting the requirements of facade and coiled material composite waterproof anti-slippage, but the prior art only reduces the smoke generated during construction by reducing the construction temperature, and there is no clear index comparison; and the viscosity of the coating prepared by the prior art (≤2500 cps at 130℃) is high, the construction viscosity is large, the unit coating dosage is large, and the prior art does not mention reducing the construction dosage to reduce the construction and material costs.

[0005] Therefore, the low-volatile non-cured waterproof coating with high coating rate can not only solve the problems of excessive volatile organic compounds in the construction process, damage to the health of construction personnel and environmental pollution, and a series of safety and energy consumption problems caused by high-temperature heating in the hot melting process, but also can improve the coating area of the coating, improve the construction efficiency, and reduce the cost. SUMMARY

[0006] The purpose of the present application is to overcome the problems of traditional non-cured rubber asphalt waterproof coating, such as a large amount of volatile organic compounds, high viscosity, poor flowability, large unit area dosage, low construction efficiency, and high material cost.

[0007] To achieve the above purpose, the first aspect of the present application provides a non-cured waterproof coating composition, which contains softening oil, asphalt, rubber modifier, antioxidant, silane coupling agent, rheological agent, inorganic filler, and high-temperature auxiliary agent with a dropping point not lower than 105 DEG C.

[0008] The flash point of the softening oil is 250-280 DEG C, and the volatile content is ≤1wt%; the penetration of the asphalt is 60-100 1 / 10mm, and the volatile content is ≤0.5wt%;

[0009] The content of the softening oil is 15wt%-25wt% based on the total weight of the composition, the content of the asphalt is 40wt%-55wt%, the content of the rubber modifier is 5wt%-15wt%, the content of the antioxidant is 1-3wt%, the content of the silane coupling agent is 1wt%-3wt%, the content of the rheological agent is 0.5wt%-2wt%, the content of the inorganic filler is 5wt%-30wt%, and the content of the high-temperature auxiliary agent is 3wt%-6wt%.

[0010] The second aspect of the present application provides a method for preparing a non-cured waterproof coating, which applies the components in the non-cured waterproof coating composition of the first aspect, and the method comprises:

[0011] (1) first mixing the softening oil and the asphalt to obtain material I;

[0012] (2) second mixing the material I with the antioxidant, the rubber modifier, the inorganic filler, and the silane coupling agent in sequence to obtain material II;

[0013] (3) third mixing the material II with the rheological agent to obtain material III;

[0014] (4) fourth mixing the material III with the high-temperature auxiliary agent to obtain the non-cured waterproof coating.

[0015] The third aspect of the present application provides the non-cured waterproof coating prepared by the method of the second aspect.

[0016] The fourth aspect of the present application provides the application of the non-cured waterproof coating of the third aspect in the field of building waterproof materials.

[0017] The present application has at least the following advantages:

[0018] (1) High coating rate: The present application abandons the traditional non-cured conventional preparation idea, uses high flash point low volatile softening oil to match low volatile asphalt as the main material, and modifies and prepares on the basis, adds rheological agent and ultra-fine particle size inorganic filler, the non-cured waterproof coating provided by the present application has the advantages of low viscosity, good fluidity and good thixotropy, the viscosity is temporarily reduced during construction or stirring, so as to improve the coating rate, realize single construction covering larger area, improve the construction efficiency and reduce the cost; at the same time, the high viscosity is restored under the condition of standing, which prevents sagging and reduces material waste.

[0019] (2) Low volatility: The present application clearly measures by index VOC content, effectively controls harmful volatile matter; the non-cured waterproof coating provided by the present application not only solves the problems of high hot melt construction temperature, excessive volatile organic compounds generated during construction process, damage to construction personnel health and pollution to environment, but also avoids a series of safety and energy consumption problems brought by high temperature heating in the hot melt process. DETAILED DESCRIPTION

[0020] The endpoints of the ranges and any values disclosed herein are not limited to the precise values recited as the exact dimensions are not considered critical for the present application. The endpoints of the ranges and any values are provided as approximations only, and are understood to encompass values approximately the same as the endpoints. Any numerical range is intended to include all values from the lower limit to the upper limit. In addition, each midpoint between any stated values and each stated value is also intended to be encompassed. Other examples, and equivalents of the devices and methods disclosed herein, can occur to one skilled in the art upon a reading of the specification and can be had from practice of the present application without departing from the spirit of the application. Therefore, the present application should not be limited by the particular examples disclosed.

[0021] As described before, the first aspect of the present application provides a non-cured waterproof coating composition, which contains softening oil, asphalt, rubber modifier, antioxidant, silane coupling agent, rheological agent, inorganic filler and high temperature auxiliary agent with a dropping point not less than 105℃;

[0022] The flash point of the softening oil is 250-280℃, and the volatile content is ≤1wt%; the penetration of the asphalt is 60-100 1 / 10mm, and the volatile content is ≤0.5wt%;

[0023] Based on the total weight of the composition, the softening oil content is 15wt%-25wt%, the asphalt content is 40wt%-55wt%, the rubber modifier content is 5wt%-15wt%, the antioxidant content is 1-3wt%, the silane coupling agent content is 1wt%-3wt%, the rheology modifier content is 0.5wt%-2wt%, the inorganic filler content is 5wt%-30wt%, and the high-temperature additive content is 3wt%-6wt%.

[0024] Preferably, the rubber modifier is selected from at least one of styrene-butadiene-styrene block copolymer, styrene-butadiene rubber, and styrene-isoprene-styrene block copolymer.

[0025] Preferably, the rheology modifier is organically modified bentonite and / or fumed silica. In this preferred embodiment, the non-curing waterproof coating provided by the present invention exhibits thixotropy; during application or mixing, the viscosity temporarily decreases, thereby increasing the coating coverage and achieving greater coverage in a single application, thus reducing costs. Simultaneously, under static conditions, the viscosity returns to a high level, preventing sagging and reducing material waste.

[0026] Preferably, the organically modified bentonite is an organoammonium modified montmorillonite organic clay provided by Zhejiang Fenghong New Material Co., Ltd., with the grade BS-1A.

[0027] Preferably, the high-temperature additive has a melting point of 105-135°C. The inventors of this invention have discovered that, under this preferred condition, the viscosity of the non-curing waterproof coating provided by this invention is reduced, while its storage stability and high-temperature performance are improved.

[0028] More preferably, the high-temperature additive is polyethylene wax and / or polypropylene wax.

[0029] More preferably, the number-average molecular weight of the high-temperature additive is 3000-8000. Under this preferred condition, the non-curing waterproof coating provided by the present invention has a high thixotropic index, low volatile matter, excellent high and low temperature resistance, and elongation properties.

[0030] More preferably, the purity of the high-temperature additive is ≥97wt%.

[0031] Preferably, the asphalt is selected from at least one of 70# asphalt and 90# asphalt. The inventors of this invention have discovered that, under this preferred condition, the non-curing waterproof coating provided by this invention has good adhesion, flexibility, and elongation; furthermore, the coating has a low volatile content during the 130°C hot-melt process, which not only solves the problem of excessive volatile organic compounds generated during construction, harming the health of construction workers and polluting the environment, but also avoids a series of safety and energy consumption problems caused by high-temperature heating during the hot-melt process.

[0032] Preferably, the particle size of the inorganic filler is ≤10μm. The inventors of this invention have discovered that, under this preferred condition, the non-curing waterproof coating provided by this invention has reduced porosity, enhanced coating uniformity, and better rheological properties and coating gaps.

[0033] Preferably, the particle size of the inorganic filler is 0.1-10 μm.

[0034] More preferably, the inorganic filler is selected from at least one of stone powder, talc powder, and calcium powder.

[0035] Preferably, the softening oil is selected from at least one of aromatic oil, white oil, mineral oil, and machine oil.

[0036] The inventors of this invention have discovered that softening oil is a good solvent for modifiers. In this preferred case, the non-curing waterproof coating provided by this invention has lower viscosity and excellent low-temperature performance.

[0037] Preferably, the antioxidant is at least one selected from hindered phenolic antioxidant 1010 and sulfite antioxidant AT-168. In this preferred embodiment, the non-curing waterproof coating provided by the present invention exhibits excellent aging resistance and can extend its service life.

[0038] More preferably, the silane coupling agent is selected from at least one of n-octyltriethoxysilane, n-hexyltriethoxysilane, and n-decyltrimethoxysilane. In this preferred embodiment, the filler surface energy of the non-curing waterproof coating provided by the present invention is reduced, the compatibility between the filler and the system is improved, the dispersion of the filler is increased, and the agglomeration of the filler is avoided.

[0039] As previously described, a second aspect of the present invention provides a method for preparing a non-curing waterproof coating, the method being carried out using the components of the non-curing waterproof coating composition described in the first aspect, the method comprising:

[0040] (1) The softened oil and asphalt are mixed for the first time to obtain material I;

[0041] (2) The material I is mixed with antioxidant, rubber modifier, inorganic filler and silane coupling agent in sequence to obtain material II;

[0042] (3) The material II is mixed with the rheology modifier in a third mixing process to obtain material III;

[0043] (4) The material III is mixed with the high temperature additive to obtain the non-curing waterproof coating.

[0044] Preferably, in step (1), the conditions for the first mixing include: a rotation speed of 300-500 rpm and a temperature of 130-150℃.

[0045] Preferably, in step (2), the conditions for the second mixing include: a rotation speed of 500-800 rpm and a temperature of 170-180℃.

[0046] According to a particularly preferred embodiment, in step (2), the second mixing operation includes: adding an antioxidant and a rubber modifier to material I, stirring and heating at 600 rpm to 170°C, and stirring for 2 hours; after complete dispersion without obvious particle agglomeration, maintaining a speed of 600 rpm, adding inorganic filler, and stirring for 0.3 hours; then adding a silane coupling agent, and stirring at 170°C for 1 hour to obtain material II. In this preferred embodiment, the non-curing waterproof coating provided by the present invention has better high and low temperature performance and cohesive strength.

[0047] Preferably, in step (3), the conditions for the third mixing include: a rotation speed of 400-1000 rpm and a temperature of 135-145℃.

[0048] More preferably, in step (3), the third mixing time is 10-50 min. The inventors of this invention have discovered that, under this preferred condition, the internal structure of the non-curing waterproof coating provided by this invention is altered, and its viscosity decreases rapidly when subjected to shear force, resulting in better fluidity and easier construction and operation.

[0049] According to a specific implementation, in step (3), the third mixing operation includes: lowering the temperature to 135-145℃, adding the rheology modifier to material II in two portions (each with equal weight), dispersing it at high speed at 800-1000 rpm for 15-20 min after the first addition; then adding the rheology modifier a second time and dispersing it at high speed at 800-1000 rpm for 10-15 min, followed by dispersing it at low speed at 400-500 rpm for 10-15 min, and detecting that the thixotropic index TI≥2.5 to obtain material III.

[0050] Preferably, in step (4), the conditions for the fourth mixing include: a rotation speed of 800-1000 rpm and a temperature of 135-145℃.

[0051] More preferably, in step (4), the fourth mixing time is 0.5-1h.

[0052] As previously stated, the third aspect of the present invention provides a non-curing waterproof coating prepared by the method described in the second aspect.

[0053] As previously stated, the fourth aspect of the present invention provides the application of the non-curing waterproof coating described in the third aspect in the field of building waterproofing materials.

[0054] The present invention will be described in detail below through embodiments. Unless otherwise specified, all instruments and materials used in the following embodiments are commercially available products.

[0055] softening oil

[0056] Aromatic Oil I: Flash point 260℃, volatile matter 0.6wt%, purchased from Shanghai Mingzhi Industrial Co., Ltd., brand name: Aromatic Softener.

[0057] Aromatic Oil II: Flash point 200℃, volatile matter 3.2wt%, purchased from Zhengli Chemical Co., Ltd., Datian County, brand name WT820 aromatic oil.

[0058] Aromatic Oil III: Flash point 280℃, volatile matter 0.5wt%, purchased from Hengshui Xuanqing Petroleum Technology Co., Ltd., grade G40 aromatic oil.

[0059] White oil: flash point 260℃, volatile matter 0.3wt%, purchased from Hubei Beishun Lubricating Oil Co., Ltd., brand name 68 industrial white oil.

[0060] Mineral oil: flash point 260℃, volatile matter 0.7wt%, purchased from Shell, brand name Antonide 100 white mineral oil.

[0061] Engine oil: flash point 280℃, volatile matter 0.8wt%, purchased from Shanghai Nake Lubrication Technology Co., Ltd., brand name 4524.

[0062] pitch

[0063] 70# asphalt: volatile matter ≤0.5wt%, purchased from China Petrochemical Corporation, grade 70 A road petroleum asphalt.

[0064] 70# asphalt: volatile matter 1.0wt%, purchased from Dongguang County Jinda Chemical Co., Ltd.

[0065] 90# asphalt: volatile matter 0.5wt%, purchased from China Petrochemical Corporation, grade 90 A road petroleum asphalt.

[0066] 200# asphalt: volatile matter 3.8 wt%, purchased from China National Petroleum Corporation, grade 200# asphalt.

[0067] antioxidants

[0068] Hindered phenolic antioxidant 1010 (pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]): purchased from Hangzhou Jessica Chemical Co., Ltd.

[0069] AT-168 (tris(2,4-di-tert-butylphenyl) phosphite), an antioxidant of the sulfite class, was purchased from Saint-Gobain Fine Chemicals (Shanghai) Co., Ltd.

[0070] rubber modifier

[0071] SBS (styrene-butadiene-styrene block copolymer): purchased from Lee Chang Yung Rubber Co., Ltd., grade 3546.

[0072] SBR (Styrene-butadiene rubber): Purchased from Qilu Petrochemical Company, grade 1502.

[0073] SIS (styrene-isoprene-styrene block copolymer): purchased from Sinopec Baling Petrochemical Co., Ltd., grade 1209.

[0074] inorganic filler

[0075] Calcium powder: particle size 10μm, purchased from Tianjin Yandong Haotian Mineral Products Co., Ltd., brand name YDHT-03.

[0076] Talc powder I: Particle size 10μm, purchased from Guizhou Junqi Building Materials Co., Ltd., grade 1250 mesh talc powder.

[0077] Talc II: Particle size 5μm, purchased from Xinhua Hui Ultrafine Powder Factory in Lingchuan County, Guilin, grade 2500 mesh ultrafine talc.

[0078] Stone powder: with a particle size of 10μm, purchased from Shijiazhuang Hualang Mineral Products Trading Co., Ltd., grade 1250 mesh stone powder.

[0079] silane coupling agent

[0080] Octyltriethoxysilane: purchased from Wuhan Zhongxiangyue New Material Technology Co., Ltd., brand name JY-294.

[0081] n-Hexyltriethoxysilane: purchased from Guangzhou Shanghe Chemical Technology Co., Ltd., brand name silane coupling agent 321.

[0082] n-Decyltrimethoxysilane: purchased from Qufu Yishun Chemical Co., Ltd., brand name KBM-3103.

[0083] rheological agent

[0084] Organically modified bentonite: specifically, organoammonium modified montmorillonite organic clay, purchased from Zhejiang Fenghong New Material Co., Ltd., with the grade BS-1A.

[0085] Fumed silica: purchased from Shanghai Shuoxin Industrial Co., Ltd., brand name Wacker H20.

[0086] Kaolin: Purchased from Hebei Guanchuan New Material Technology Co., Ltd., grade 1250 kaolin.

[0087] high temperature aid

[0088] Polyethylene wax I: melting point of 135℃, number average molecular weight of 5000-6000, purity ≥98wt%, purchased from Nanjing Tianshi New Material Technology Co., Ltd., grade PEW-0330.

[0089] Polyethylene wax II: melting point of 125℃, number average molecular weight of 4000-5000, purity ≥98wt%, purchased from Nanjing Tianshi New Material Technology Co., Ltd., grade PEW-0279.

[0090] Polyethylene wax III: melting point of 115℃, number average molecular weight of 3500-4000, purity ≥98wt%, purchased from Nanjing Tianshi New Material Technology Co., Ltd., grade PEW-0388.

[0091] Polyethylene wax IV: melting point of 105℃, number average molecular weight of 3000-3500, purity ≥98wt%, purchased from Nanjing Tianshi New Material Technology Co., Ltd., grade PEW-0350.

[0092] Polyethylene wax V: melting point of 90℃, number average molecular weight of 1000-1500, purity ≥95wt%, purchased from Xingboyu Group, brand name HK100.

[0093] Polyethylene wax VI: melting point of 100℃, number average molecular weight of 2200-2800, purity ≥88wt%, purchased from Wuhan Xindongyi Chemical Co., Ltd., grade Q-116.

[0094] Polypropylene wax: melting point of 125℃, number average molecular weight of 5000-6000, purity ≥97wt%, purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd., brand name Lotte Chemical SFC-751R (Korea).

[0095] In the following examples, the amounts of the components are expressed in parts by weight, which, unless otherwise specified, are 100g per part by weight.

[0096] Example 1

[0097] (1) Add softened oil and asphalt to the reactor and heat to 140°C by stirring at 400 rpm (i.e., the first mixing) to obtain material I;

[0098] (2) Add antioxidant and rubber modifier to material I, stir and heat to 170°C at 600 rpm, stir for 2 h; after it is completely dispersed and there is no obvious particle agglomeration, keep the speed at 600 rpm, add inorganic filler, stir for 0.3 h; then add silane coupling agent, stir at 170°C for 1 h to obtain material II;

[0099] (3) Reduce the temperature to 140℃ and add the rheology modifier to material II in two portions (each with equal weight). After the first addition, shear and disperse the material evenly at high speed (900 rpm) for 15 min. Then add the rheology modifier a second time and shear and disperse the material at high speed (900 rpm) for 10 min, and then disperse the material at low speed (500 rpm) for 10 min. Detect the thixotropic index TI≥2.5 to ensure uniform dispersion and obtain material III.

[0100] (4) Stop heating and add high-temperature additives to material III for the fourth mixing (speed is 900 rpm, temperature is 140℃, time is 1h) to obtain non-curing waterproof coating; when the temperature drops to 125℃, put the product into an iron drum and seal it for storage.

[0101] The remaining specific process parameters of this embodiment are shown in Table 1.

[0102] Examples 2-7

[0103] The same process as in Example 1 was used, except that the types and amounts of raw materials used in the other examples were different, as detailed in Table 1.

[0104] Table 1

[0105]

[0106] Comparative Example 1

[0107] The same process as in Example 1 was used, except that softening oil was not added, and "aromatic oil I with a flash point of 260°C and a volatile content of 0.6wt%" was replaced with an equal part by weight of "200# asphalt with a flash point of 230°C and a volatile content of 3.8%". All other process parameters were the same as in Example 1.

[0108] Comparative Example 2

[0109] The same process as in Example 1 was used, except that "aromatic oil I with a flash point of 260°C and a volatile content of 0.6 wt%" was replaced with an equal part by weight of "aromatic oil II with a flash point of 200°C and a volatile content of 3.2 wt%". All other process parameters were the same as in Example 1.

[0110] Comparative Example 3

[0111] The same process as in Example 1 was used, except that "70# asphalt with 0.3wt% volatile matter" was replaced with an equal part by weight of "70# asphalt with 1.0wt% volatile matter". All other process parameters were the same as in Example 1.

[0112] Comparative Example 4

[0113] The same process as in Example 1 was used, except that “polyethylene wax I with a melting point of 135°C” was replaced with an equal part by weight of “polyethylene wax V with a melting point of 90°C”. All other process parameters were the same as in Example 1.

[0114] Comparative Example 5

[0115] The same process as in Example 1 was used, except that the amount of aromatic oil I was adjusted from "25 parts" to "10 parts", and the amount of "70# asphalt" was adjusted from "50 parts" to "65 parts". All other process parameters were the same as in Example 1.

[0116] Comparative Example 6

[0117] The same process as in Example 1 was used, except that step (3) was omitted and the "rheology modifier" in step (3) was replaced with an equal weight of "calcium powder (i.e., inorganic filler) with a particle size of 10 μm". All other process parameters were the same as in Example 1.

[0118] The above-mentioned embodiments and comparative examples were tested for performance according to the standard JC / T 2428-2017 "Non-curing rubber asphalt waterproof coating".

[0119] Among them, thixotropic index η1 represents the viscosity at a rotation speed of 1 rpm, and η10 represents the viscosity at a rotation speed of 10 rpm.

[0120] The VOCs (volatile organic compounds) content shall be determined in accordance with GB / T 23985.

[0121] The determination of nonvolatile matter content was carried out at a temperature of (23±2)℃ and a relative humidity of (50±5)%. Moisture content was not measured and was set to zero. The procedure was performed according to GB / T 1725, with a sample size of (1±0.1) g, baked at (130±2)℃ for 3 hours. The volatile organic compound content was calculated according to method 2 of GB / T 23985 8.2.

[0122] The specific test results are shown in Table 2.

[0123] Table 2

[0124]

[0125] As can be seen from the above results, the non-curing waterproof coating provided by the present invention has low viscosity, high thixotropic index, low volatile matter, excellent high and low temperature resistance and elongation performance, and the unit dosage of the coating is small, thereby improving construction efficiency.

[0126] Comparative Examples 1-3 show that replacing high-flash-point softening oil with asphalt or low-flash-point softening oil, or choosing highly volatile asphalt as the raw material, significantly increases the VOC content of the coating. Specifically, Comparative Example 1 shows increased viscosity and higher unit dosage, resulting in more volatiles generated during heating, which affects both construction safety and efficiency; Comparative Example 2 shows decreased heat resistance.

[0127] As can be seen from Comparative Example 4, selecting high-temperature additives with low dropping melting points has a significant impact on the overall heat resistance and low-temperature flexibility of the product, and also has a slight impact on VOCs and elongation.

[0128] Comparative Example 5 shows that reducing the proportion of high flash point softening oil and increasing the proportion of asphalt leads to higher coating viscosity, increased unit dosage, reduced construction efficiency, increased VOC content, increased product brittleness, and decreased low-temperature flexibility and elongation.

[0129] Comparative Example 6 shows that removing the rheology modifier results in poor thixotropy of the coating, a relatively high unit dosage, a smaller coating coverage, increased construction costs, and reduced construction efficiency.

[0130] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A composition for a non-curing waterproof coating, characterized in that, The composition contains softening oil, asphalt, rubber modifier, antioxidant, silane coupling agent, rheology modifier, inorganic filler, and high-temperature additive with a dropping melting point of not less than 105°C; The softened oil has a flash point of 250-280℃ and a volatile content of ≤1wt%; the asphalt has a penetration of 60-100 1 / 10mm and a volatile content of ≤0.5wt%. Based on the total weight of the composition, the softening oil content is 15wt%-25wt%, the asphalt content is 40wt%-55wt%, the rubber modifier content is 5wt%-15wt%, the antioxidant content is 1-3wt%, the silane coupling agent content is 1wt%-3wt%, the rheology modifier content is 0.5wt%-2wt%, the inorganic filler content is 5wt%-30wt%, and the high-temperature additive content is 3wt%-6wt%.

2. The composition for non-curing waterproof coatings according to claim 1, characterized in that, The rubber modifier is selected from at least one of styrene-butadiene-styrene block copolymer, styrene-butadiene rubber, and styrene-isoprene-styrene block copolymer; And / or, the rheology modifier is organically modified bentonite and / or fumed silica.

3. The composition for non-curing waterproof coatings according to claim 2, characterized in that, The high-temperature additive has a melting point of 105-135℃; And / or, the high-temperature additive is polyethylene wax and / or polypropylene wax; And / or, the number average molecular weight of the high-temperature additive is 3000-8000.

4. The composition for non-curing waterproof coatings according to claim 2, characterized in that, The particle size of the inorganic filler is ≤10μm; And / or, the inorganic filler is selected from at least one of stone powder, talc powder, and calcium powder.

5. The composition for non-curing waterproof coatings according to any one of claims 1-4, characterized in that, The softening oil is selected from at least one of mineral oil and engine oil.

6. The composition for non-curing waterproof coatings according to claim 5, characterized in that, The mineral oil is an aromatic oil and / or white oil.

7. The composition for non-curing waterproof coatings according to any one of claims 1-4, characterized in that, The antioxidant is at least one of hindered phenolic antioxidant 1010 and sulfite antioxidant AT-168; And / or, the silane coupling agent is selected from at least one of n-octyltriethoxysilane, n-hexyltriethoxysilane, and n-decyltrimethoxysilane.

8. A method for preparing a non-curing waterproof coating, characterized in that, This method uses the components of the non-curing waterproof coating composition according to any one of claims 1-7 for preparation, and the method includes: (1) The softened oil and asphalt are mixed for the first time to obtain material I; (2) The material I is mixed with antioxidant, rubber modifier, inorganic filler and silane coupling agent in sequence to obtain material II; (3) The material II is mixed with the rheology modifier in a third mixing process to obtain material III; (4) The material III is mixed with the high temperature additive to obtain the non-curing waterproof coating.

9. The method according to claim 8, characterized in that, In step (1), the conditions for the first mixing include: a rotation speed of 300-500 rpm and a temperature of 130-150℃; And / or, in step (2), the conditions for the second mixing include: a rotation speed of 500-800 rpm and a temperature of 170-180°C; And / or, in step (3), the conditions for the third mixing include: a rotation speed of 400-1000 rpm and a temperature of 135-145°C; And / or, in step (4), the conditions for the fourth mixing include: a rotation speed of 800-1000 rpm and a temperature of 135-145°C.

10. A non-curing waterproof coating prepared by the method of claim 8 or 9.

11. The application of the non-curing waterproof coating according to claim 10 in the field of building waterproof materials.

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