Water-based non-cured rubber asphalt waterproof coating and preparation method thereof

Abstract

The application provides a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof, and belongs to the technical field of building waterproof materials.The waterproof coating comprises the following raw materials in parts by weight: asphalt 50-60 parts, a compatilizer 20-30 parts, a modifier 9-14 parts, a tackifier 3-5 parts, a coupling agent 1.5-2.5 parts, water 50-60 parts, an emulsifier 3-5 parts and a stabilizer 0.2-0.5 parts; the modifier is a thermoplastic elastomer and a high molecular polymer emulsion.The application also provides a preparation method of the water-based non-cured rubber asphalt waterproof coating.The coating can be applied at normal temperature without heating, the performance of the coating is equivalent to that of a hot-melt non-cured rubber asphalt waterproof coating, and the corrosion resistance, the flame resistance and the adhesion of the base layer of the coating are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building waterproof materials, and particularly relates to a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof. BACKGROUND

[0002] The non-cured rubber asphalt waterproof coating is a creep type waterproof coating, can meet the deformation needs of buildings, has good adhesion, creep and self-healing, can be used as a waterproof layer alone to close capillary holes and cracks of a base, solve the water channeling problem of the waterproof layer, can be used as a waterproof adhesive to paste a waterproof roll, jointly form a composite waterproof layer, solve the compatibility problem of the existing waterproof roll and waterproof coating when used together, greatly improve the waterproof performance of a building project, and is widely used.

[0003] Most of the non-cured rubber asphalt waterproof coatings commonly used in construction at present are hot-melt materials, need to be heated at high temperature to be sprayed or scraped, are prone to fire, consume energy, produce smoke during the hot-melt process, pollute the environment, and often cause burns of construction personnel due to high construction temperature, and have poor safety. The hot-melt non-cured rubber asphalt waterproof coating is prohibited in many places. There are a few reports about water-based non-cured rubber asphalt waterproof materials, but the modified asphalt needs to be prepared first and then emulsified, the preparation temperature of the modified asphalt is high, the preparation process and method have high requirements on the performance of a shearing device, and energy consumption is high. SUMMARY

[0004] The application aims to provide a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof. The coating does not need to be heated and can be constructed at normal temperature, avoids damage to the health of construction personnel caused by high temperature and asphalt smoke produced by heating, saves energy, and is green and environmentally friendly. The preparation process of the coating is simple, does not need a high-performance shearing device, can reduce the preparation temperature and energy consumption, and is easy to operate. According to the process steps of the application, any ion type polymer emulsion can be used as a modifier, the selection range of the modifier emulsion is expanded. The performance of the coating is not only equivalent to that of the hot-melt non-cured rubber asphalt waterproof coating, but also improves the corrosion resistance, flame resistance and adhesion of the base of the coating.

[0005] In order to achieve the above-mentioned purpose, the application provides the following technical scheme.

[0006] The application provides a water-based non-cured rubber asphalt waterproof coating, which comprises the following raw materials in parts by weight: asphalt 50-60 parts, compatibility agent 20-30 parts, modifier 9-14 parts, tackifier 3-5 parts, coupling agent 1.5-2.5 parts, water 50-60 parts, emulsifier 3-5 parts and stabilizer 0.2-0.5 parts; the modifier is a thermoplastic elastomer and a high molecular polymer emulsion.

[0007] Preferably, the thermoplastic elastomer comprises one or a mixture of several of SBS, SIS, SEBS, SEPS and CPE, and the high molecular polymer emulsion comprises one or a mixture of several of styrene-butadiene latex, chloroprene latex, butyronitrile latex, acrylate emulsion, benzene and propylene emulsion or ethylene-vinyl acetate emulsion.

[0008] Preferably, the modifier comprises SBS 5-8 parts and SBR 4-6 parts.

[0009] Preferably, the compatibility agent is one or a mixture of several of catalytic cracking slurry oil, aromatic oil, naphthenic oil or reduced line oil.

[0010] Preferably, the tackifier comprises one or a mixture of several of coumarone resin, terpene resin, rosin resin, carbon five petroleum resin or carbon nine petroleum resin.

[0011] Preferably, the coupling agent is titanium diisooctyl phosphonate methyl glycolate.

[0012] Preferably, the emulsifier is a cationic emulsifier and a non-ionic emulsifier.

[0013] Preferably, the cationic emulsifier is octadecyl trimethyl ammonium chloride and the non-ionic emulsifier is op-10.

[0014] Preferably, the stabilizer is a cationic polyacrylamide.

[0015] The application further provides a preparation method of the water-based non-cured rubber asphalt waterproof coating, which comprises the following steps:

[0016] (1) according to the proportion, the thermoplastic elastomer is weighed and added into the compatibility agent, and heated until the thermoplastic elastomer is completely dissolved;

[0017] (2) the mixture in step (1) is modified by sequentially adding asphalt and tackifier to prepare modified asphalt;

[0018] (3) according to the proportion, water is weighed and sequentially added into the water in order, i.e. high molecular polymer emulsion, emulsifier, stabilizer and coupling agent, and stirred until dissolved to obtain an emulsion;

[0019] (4) under the action of colloid mill, the modified asphalt prepared in step (2) is added into the emulsion for mixing and emulsification, and then a water-based non-cured rubber asphalt waterproof coating is obtained.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The present application provides a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof. The coating comprises SBS and SBR, and the synergistic effect of SBS and SBR can greatly improve the heat resistance, low-temperature resistance, elongation, elasticity and adhesion to the base layer and the roll material of the asphalt.

[0022] The water-based non-cured rubber asphalt waterproof coating of the present application can be applied at room temperature, overcoming the drawbacks of the currently widely used hot-melt non-cured rubber asphalt waterproof coating which needs to be heated to a high temperature (more than 100℃) for application. The problems caused by the high temperature, such as energy consumption, emission of smoke during the heating process, pollution of the environment, and the risk of accidental scalding of the construction personnel, are solved. The present application not only saves energy, but also does not produce asphalt smoke. Because it is green and environmentally friendly, it can be applied not only in the suburbs, but also in any place in the city. The preparation process of the present application can use any ionic type of high molecular polymer emulsion, such as anionic, cationic or non-ionic, as a modifier, breaking through the limitation of the ionic type of high molecular polymer emulsion and making the selection range of the modifier wider. Compared with the preparation of hot-melt non-cured rubber asphalt, the preparation of the coating does not require high-performance shearing equipment, the preparation temperature is relatively low, the preparation process is simple, and the preparation conditions are easy to operate. The performance of the coating is not only comparable to that of hot-melt non-cured rubber asphalt waterproof coating, but also improves the elongation, corrosion resistance, flame resistance and adhesion to the base layer of the coating due to the addition of the titanate coupling agent. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical essence of the present application, the applicant will make a detailed description of the specific embodiments of the present application.

[0024] The present application provides a water-based non-cured rubber asphalt waterproof coating, which comprises the following raw materials in parts by weight: asphalt 50-60 parts, compatibility agent 20-30 parts, modifier 9-14 parts, tackifier 3-5 parts, coupling agent 1.5-2.5 parts, water 50-60 parts, emulsifier 3-5 parts, and stabilizer 0.2-0.5 parts. The modifier is a thermoplastic elastomer and a high molecular polymer emulsion.

[0025] According to the present application, the asphalt is heavy asphalt, and the asphalt is the main component of the non-cured rubber asphalt waterproof coating. The petroleum asphalt itself has excellent waterproof performance, and only needs to be modified to have excellent high-temperature resistance, low-temperature resistance and adhesion, thereby obtaining good waterproof effect. The asphalt used in the present application is preferably one or a mixture of several of 50#, 70#, 90# and 110#, and more preferably 70# and 90# heavy asphalt.

[0026] According to the present application, the modifier includes a thermoplastic elastomer and a high molecular polymer emulsion. Traditional pure asphalt has the properties of high-temperature flow and low-temperature brittle fracture, and cannot meet the needs of modern waterproofing, so it is necessary to modify the asphalt with a modifier to improve the high-temperature and low-temperature performance of the asphalt to meet the needs. The thermoplastic elastomer used in the present application preferably includes one or a mixture of several of SBS, SIS, SEBS, SEPS and CPE, and the high molecular polymer emulsion preferably includes one or a mixture of several of styrene butadiene latex, chloroprene latex, nitrile butadiene latex, acrylate emulsion, styrene-acrylic emulsion and ethylene-vinyl acetate emulsion, and preferably includes SBS 5-8 parts and SBR 4-6 parts. SBS is the most widely used general asphalt modifier that can basically adapt to various regional climate and environmental conditions, and has the characteristics of providing good high and low temperature performance, especially outstanding high temperature performance. SBR has the ability to extend and deform, and has good compatibility with asphalt, which can improve the rheological properties of asphalt, greatly improve the viscoelasticity and low-temperature extensibility of asphalt. The synergistic effect of SBS and SBR can greatly improve the heat resistance, low-temperature resistance, extensibility and elasticity of asphalt, and also improve the adhesion to the base layer and the roll material. The block ratio of SBS is S / B=30-40 / 60-70, and the styrene content in the styrene butadiene latex is 22-25%.

[0027] According to the present application, the compatibilizer is preferably one or a mixture of several of catalytic cracking slurry oil, aromatic oil, naphthenic oil and linear oil. The main function of the compatibilizer is to accelerate the dissolution speed of SBS, enhance the compatibility of SBS and asphalt, make SBS uniformly dispersed in asphalt, form a stable continuous distribution phase, and the interaction between the components is more sufficient, thereby improving the initial adhesion, reducing the cohesion of the coating, ensuring the creep properties of the coating, and being beneficial to enhancing the extensibility, low-temperature flexibility and other properties of the waterproof coating. More preferably, the compatibilizer is naphthenic oil, and the opening flash point of the naphthenic oil is not less than 210°C.

[0028] According to the application, the tackifier preferably comprises one or a mixture of several of cumarone resin, terpene resin, rosin resin, carbon five petroleum resin, carbon nine petroleum resin, and more preferably cumarone resin with a softening point of 95-105 DEG C. The tackifier functions to wet the bonding surface through surface diffusion or internal diffusion, so as to increase the bonding strength between the waterproof coating and the adherend. It can reduce the cohesive strength of the waterproof coating, and endow it with initial tack and peel strength, so as to increase the tackiness of the waterproof coating, and make the waterproof coating more closely combined with the base layer and the protective layer, and more easily achieve full paving, and prevent water from seeping. Meanwhile, the tackifier can soften, reinforce, tackify and disperse the rubber component in the waterproof coating system, so as to make the components in the waterproof coating more fully function, and make the waterproof coating more excellent in performance.

[0029] According to the application, the emulsifier can be anionic, cationic or non-ionic emulsifier alone, or a combination of anionic and non-ionic emulsifiers, or a combination of cationic and non-ionic emulsifiers. The emulsifier is a key component for preparing the water-based non-cured rubber asphalt waterproof coating. It functions to reduce the surface tension of water, so as to form a stable encapsulated film on the surface of the dispersed asphalt particles, and prevent the agglomeration of the asphalt particles. In the application, the cationic and non-ionic emulsifiers are combined. The combined emulsifier can on one hand increase the coagulation and drying speed, and on the other hand better match the high molecular polymer emulsion, and avoid the demulsification phenomenon. The cationic emulsifier is a quaternary ammonium salt emulsifier, and preferably octadecyl trimethyl ammonium chloride. The non-ionic emulsifier is an alkyl phenol polyoxyethylene ether, and preferably op-10.

[0030] According to the application, the stabilizer can be an organic high molecular material or an inorganic salt. The stabilizer functions to increase the storage stability of the emulsified asphalt. Since the emulsified asphalt is a thermodynamically unstable dispersion system of oil in water, the addition of the stabilizer can increase the viscosity and density of the water phase, increase the resistance of the Brownian motion of the asphalt particles, enhance the double-layer electric effect between the asphalt particles, increase the repulsive force between the particles, and slow down the agglomeration speed between the particles. In the application, the high molecular material cationic polyacrylamide is used as the stabilizer.

[0031] According to the application, the coupling agent can be a silane coupling agent or a titanate coupling agent. The coupling agent functions on one hand to form a chemical bond between the base layer and the asphalt, so as to increase the adhesion, and on the other hand to better disperse the modifier into the asphalt, and increase the extension and deformation performance of the coating. The preferred coupling agent is the titanate coupling agent di(diisooctyl phosphoroyl) methyl titanate.

[0032] The application further provides a preparation method of the water-based non-cured rubber asphalt waterproof coating, comprising the following steps:

[0033] According to the proportion, the thermoplastic elastomer is weighed and added into the compatilizer, which is preferably heated to 130-140℃, and kept for 30 minutes until the thermoplastic elastomer is completely dissolved;

[0034] The mixture of step (1) is modified by sequentially adding bitumen and tackifier, and the modification is preferably heating to 155-165℃, and then shearing at 1300-1500r / min for 30-40 minutes, and then stopping, and then cooling to 135-145℃ and keeping, to obtain modified bitumen;

[0035] According to the proportion, water is weighed, and then the polymer emulsion, emulsifier, stabilizer and coupling agent are sequentially added into the water, and stirred until the emulsifier and stabilizer are dissolved, and the whole system is uniformly dispersed, to obtain emulsion;

[0036] The modified bitumen obtained in step (2) is mixed into the emulsion under the action of colloid mill, and then emulsified for 3-5 minutes, and then cooled to room temperature, to obtain the water-based non-cured rubber bitumen waterproof coating.

[0037] The application will be further described in detail below in combination with specific examples. The raw materials involved in the examples are commercially available.

[0038] Example 1

[0039] A water-based non-cured rubber bitumen waterproof coating includes the following components by weight fraction:

[0040] 70# bitumen 50 parts, compatilizer naphthenic oil 20 parts, modifier SBS 5 parts, SBR latex (converted into dry glue) 4 parts, tackifier coumarone resin 3 parts, bis (diisooctyl phosphoyl) methyl glycolic acid titanium acid ester 1.5 parts, water 50 parts, octadecyl trimethyl ammonium chloride 2 parts, op-10 1 part, cationic polyacrylamide 0.2 parts.

[0041] A preparation method of a water-based non-cured rubber bitumen waterproof coating includes:

[0042] (1) According to the proportion, the corresponding mass fraction of SBS is weighed and added into the compatilizer naphthenic oil, and heated to 135℃, and kept for 30 minutes until the SBS is completely dissolved.

[0043] (2) The mixture of step (1) is sequentially added with the corresponding fraction of bitumen and tackifier coumarone resin, heated to 160℃, and then sheared at 1400r / min for 35 minutes, and then stopped, and then cooled to 140℃ and kept, to obtain modified bitumen.

[0044] (3) Preparation of emulsion. The corresponding mass fraction of water is weighed according to the proportion, and SBR latex, non-ionic emulsifier op-10, cationic emulsifier octadecyl trimethyl ammonium chloride, stabilizer cationic polyacrylamide, coupling agent titanium diisooctyl phosphoyl methyl glycolate are sequentially added into the water, stirred and heated to 58℃ until the emulsifier and stabilizer are dissolved, and the whole system is uniformly dispersed.

[0045] (4) Under the action of colloid mill, the modified asphalt prepared in step (2) is added to the emulsion and mixed, and after emulsification for 3 min, the material is discharged, and cooled to room temperature to obtain the water-based non-cured rubber asphalt waterproof coating of the present application.

[0046] Example 2

[0047] A water-based non-cured rubber asphalt waterproof coating, including the following components by weight fraction: 70# asphalt 60 parts, compatibilizer naphthenic oil: 30 parts, modifier: SBS 8 parts, SBR latex (converted to dry glue) 6 parts, tackifier coumarone resin 5 parts, diisooctyl phosphoyl methyl glycolate titanium diisooctyl phosphoyl methyl glycolate 2.5 parts, water 60 parts, octadecyl trimethyl ammonium chloride 3 parts, op-10 2 parts, cationic polyacrylamide 0.5 parts.

[0048] The above water-based non-cured rubber asphalt waterproof coating is prepared according to the preparation method of Example 1.

[0049] Example 3

[0050] A water-based non-cured rubber asphalt waterproof coating, including the following components by weight fraction: 70# asphalt 55 parts, compatibilizer naphthenic oil 25 parts, modifier: SBS 6.5 parts, SBR latex (converted to dry glue) 5 parts, tackifier coumarone resin 4 parts, diisooctyl phosphoyl methyl glycolate titanium diisooctyl phosphoyl methyl glycolate 2 parts, water 55 parts, octadecyl trimethyl ammonium chloride 2.5 parts, op-10 1.5 parts, cationic polyacrylamide 0.4 parts.

[0051] The above water-based non-cured rubber asphalt waterproof coating is prepared according to the preparation method of Example 1.

[0052] Comparative Example:

[0053] The raw materials commonly used at present for preparing hot-melt non-cured rubber asphalt include asphalt, compatibilizer, modifier, tackifier, and filler, and the preparation process and conditions are as follows:

[0054] (1) The corresponding raw materials are weighed according to the proportion, and then the asphalt is heated and warmed to 130-160℃;

[0055] (2) The compatibilizer and tackifier are added to the 130-160℃ asphalt, and stirred at low speed for 20-30min;

[0056] (3) Add modifier such as SBS and SBR, increase temperature to 180-200℃, and start colloid mill, stir for 1-2 hours until the modifier is completely melted;

[0057] (4) Keep temperature at 160-180℃, add filler and stir for 30-50 minutes until the filler is evenly dispersed;

[0058] (5) Reduce temperature to 130-150℃, discharge, and the hot melt non-curing rubber asphalt waterproof coating is obtained.

[0059] In the hot melt non-curing rubber asphalt waterproof coating, the filler can improve the heat resistance of the coating, but the addition amount must be controlled within a certain range, otherwise the extensibility and low temperature flexibility of the coating will be reduced. In order to better compare the performance of the water-based non-curing rubber asphalt waterproof coating, no filler is added in the following comparative example.

[0060] Comparative Example 1

[0061] A hot melt non-curing rubber asphalt waterproof coating, by weight fraction, includes the following components: 70# asphalt 50 parts, compatibilizer naphthenic oil 20 parts, modifier: SBS 5 parts, SBR 4 parts; tackifier coumarone resin 3 parts.

[0062] The preparation method of the hot melt non-curing rubber asphalt is as follows:

[0063] (1) The corresponding raw materials are weighed according to the proportion, and then the asphalt is heated to 145℃;

[0064] (2) Add compatibilizer naphthenic oil and tackifier coumarone resin to the 145℃ asphalt, and stir at low speed for 25min;

[0065] (3) Add modifier SBS and SBR, increase temperature to 190℃, and start colloid mill, stir for 1.5 hours until the modifier is completely melted;

[0066] (4) Keep temperature at 170℃, add filler and stir for 40 minutes until the filler is evenly dispersed;

[0067] (5) Reduce temperature to 140℃, discharge, and the hot melt non-curing rubber asphalt waterproof coating is obtained.

[0068] Comparative Example 2

[0069] A water-based non-curing rubber asphalt waterproof coating, by weight fraction, includes the following components: asphalt 60 parts, compatibilizer naphthenic oil 30 parts, modifier: SBS 8 parts, SBR 6 parts.

[0070] The preparation method of Comparative Example 2 is the same as that of Comparative Example 1.

[0071] After the water in the water-based non-cured rubber asphalt waterproof coating of the present application is completely evaporated, performance testing is carried out, and the results are compared with those of the comparative examples, as shown in Table 1.

[0072] Two non-cured rubber asphalt waterproof coating test results:

[0073]

[0074]

[0075] As can be seen from the test results of the above examples and comparative examples, the water-based non-cured rubber asphalt waterproof coating prepared in the present application meets the index requirements, has better elongation compared with hot-melt non-cured rubber asphalt waterproof coating, and has low construction temperature, which is more friendly to people and the environment.

[0076] The above embodiments of the present application are described in detail, and specific examples are applied to explain the principles and implementation modes of the present application. The above example is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An aqueous non-curing rubber bituminous waterproofing coating, characterized by, The asphalt waterproof coating is prepared from the following raw materials in parts by weight: asphalt 50-60 parts, compatibilizer 20-30 parts, modifier 9-14 parts, tackifier 3-5 parts, coupling agent 1.5-2.5 parts, water 50-60 parts, emulsifier 3-5 parts, and stabilizer 0.2-0.5 parts; the modifier is SBS 5-8 parts and SBR 4-6 parts.

2. The water-based non-cured rubber asphalt waterproof coating according to claim 1, characterized in that, The compatibilizer is one or a mixture of several of catalytic cracking slurry oil, aromatic oil, naphthenic oil or reduced line oil.

3. The water-based non-cured rubber asphalt waterproof coating according to claim 1, characterized in that, The tackifier includes one or a mixture of several of coumarone resin, terpene resin, rosin resin, carbon five petroleum resin or carbon nine petroleum resin.

4. The water-based non-cured rubber asphalt waterproof coating according to claim 1, characterized in that, The coupling agent is titanium di (diisooctyl phosphoric acid) methyl hydroxyacetate.

5. The water-based non-cured rubber asphalt waterproof coating according to claim 1, characterized in that, The emulsifier is a cationic and non-ionic emulsifier.

6. The aqueous non-curing rubber bituminous waterproofing coating as claimed in claim 5, wherein, The cationic emulsifier is octadecyl trimethyl ammonium chloride and the non-ionic emulsifier is op-10.

7. The water-based non-cured rubber asphalt waterproof coating according to claim 1, characterized in that, The stabilizer is cationic polyacrylamide.

8. The method of claim 1, wherein the water-based non-cured rubber asphalt waterproof coating is prepared by mixing the water-based non-cured rubber asphalt waterproof coating composition with water. The method comprises the following steps: (1) SBS is weighed according to the proportion and added into the compatibilizer, and heated until the thermoplastic elastomer is completely dissolved; (2) the mixture of step (1) is modified by adding asphalt and tackifier in sequence to prepare modified asphalt; (3) water is weighed according to the proportion, and SBR, emulsifier, stabilizer and coupling agent are sequentially added into the water and stirred until dissolved to obtain an emulsion; (4) the modified asphalt prepared in step (2) is mixed into the emulsion under the action of a colloid mill to emulsify, and a water-based non-cured rubber asphalt waterproof coating is obtained.

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