CN118240415A - Self-cleaning agent, preparation method and application thereof, self-cleaning water-based asphalt waterproof paint and preparation method thereof - Google Patents
Self-cleaning agent, preparation method and application thereof, self-cleaning water-based asphalt waterproof paint and preparation method thereof Download PDFInfo
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- CN118240415A CN118240415A CN202410293591.XA CN202410293591A CN118240415A CN 118240415 A CN118240415 A CN 118240415A CN 202410293591 A CN202410293591 A CN 202410293591A CN 118240415 A CN118240415 A CN 118240415A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000010426 asphalt Substances 0.000 title claims abstract description 41
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 38
- 239000003973 paint Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000004140 cleaning Methods 0.000 title claims abstract description 16
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 239000002270 dispersing agent Substances 0.000 claims abstract description 25
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 24
- 239000002904 solvent Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 11
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 claims abstract description 8
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims abstract description 8
- VHJLVAABSRFDPM-QWWZWVQMSA-N dithiothreitol Chemical compound SC[C@@H](O)[C@H](O)CS VHJLVAABSRFDPM-QWWZWVQMSA-N 0.000 claims abstract description 8
- 229950009390 symclosene Drugs 0.000 claims abstract description 8
- 239000002562 thickening agent Substances 0.000 claims description 22
- 239000000839 emulsion Substances 0.000 claims description 15
- 239000002518 antifoaming agent Substances 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 14
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical group CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 4
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 4
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920000126 latex Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- -1 acyl phosphine oxide compound Chemical class 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000001054 red pigment Substances 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000008157 edible vegetable oil Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention discloses a self-cleaning agent, a preparation method and application thereof, and a self-cleaning water-based asphalt waterproof coating and a preparation method thereof, wherein the preparation method comprises the following steps: (1) Uniformly mixing an initiator, trichloroisocyanuric acid, 2-mercaptobenzimidazole and a first solvent to obtain a mixed solution; then, adding the first dispersing agent and 1, 4-dithiothreitol into the mixed solution, and uniformly stirring and mixing to obtain a fluororubber treating agent; (2) Stirring and mixing the crushed fluororubber and the second solvent, then adding the fluororubber treating agent, continuously stirring, adding the nano TiO 2 powder again, continuously stirring, and finally carrying out vacuum defoaming to obtain the self-cleaning agent. The invention effectively solves the problems of outdoor construction of the water-based asphalt waterproof paint, and easy adsorption of dust and greasy dirt on the coating.
Description
Technical Field
The invention belongs to the technical field of waterproof paint, and particularly relates to a self-cleaning agent, a preparation method and application thereof, and a self-cleaning water-based asphalt waterproof paint and a preparation method thereof.
Background
The water-base asphalt waterproof paint is prepared with petroleum asphalt, emulsifier, modified latex or emulsion, stuffing and functional assistant as main material and through mechanical stirring and dispersing homogeneously. The water evaporation of the water-based asphalt waterproof paint coating is slow, and the curing period is long. The construction is completely exposed to the air, which may cause the surface to adsorb a large amount of dust. Meanwhile, the mildew easily occurs in a dark and moist environment.
Under the induction of ultraviolet light, the TiO 2 can decompose stains on the surface of the coating into substances such as CO 2、H2O、H2SO4、HNO3 which are easy to wash away. Although the TiO 2 direct coating is simpler to prepare, the coating has the defects of low high temperature resistance, weak coating adhesion capability, weak self-cleaning capability and the like, so that the application of the coating has certain limitations. Fluororubbers have a high degree of chemical stability, high temperature resistance, excellent tensile properties and tear resistance, and good self-cleaning properties, but are insoluble in water.
Disclosure of Invention
The invention aims to provide a self-cleaning agent, a preparation method and application thereof, and a self-cleaning water-based asphalt waterproof paint and a preparation method thereof; the self-cleaning agent with TiO 2 molecules adsorbed on the surfaces of fluororubber particles can be well dispersed in a water phase by compounding organic and inorganic self-cleaning materials, and the self-cleaning agent is added into the water-based asphalt waterproof paint, so that the coating can automatically achieve the cleaning purpose under the action of external force such as rainwater and the like, and the service life is prolonged.
In order to achieve the above object, a first aspect of the present invention provides a method for preparing a self-cleaning agent, the method comprising:
(1) Uniformly mixing an initiator, trichloroisocyanuric acid, 2-mercaptobenzimidazole and a first solvent to obtain a mixed solution; then, adding a first dispersing agent and 1, 4-dithiothreitol into the mixed solution, and uniformly stirring and mixing to obtain a fluororubber treating agent;
(2) Stirring and mixing the crushed fluororubber and the second solvent, then adding the fluororubber treating agent, continuing stirring, adding nano TiO 2 powder again, continuing stirring, and finally carrying out vacuum defoaming to obtain the self-cleaning agent.
In the invention, the fluororubber treating agent prepared in the step (1) aims to improve the affinity between organic molecules and inorganic fillers and realize the adhesion between TiO 2 molecules and fluororubber particles.
According to the self-cleaning agent with TiO 2 molecules adsorbed on the surfaces of fluororubber particles, the solubility of rubber molecules in water is improved by hydrophilic inorganic molecules on the surface layer, and the self-cleaning agent is used in water-based asphalt waterproof paint, so that the coating is endowed with excellent self-cleaning performance, and the high temperature resistance and the tensile property of the coating are improved.
Under the action of the fluororubber treating agent, tiO 2 inorganic small molecules are adsorbed on the surfaces of fluororubber particles, and the fluororubber high molecules can be better dispersed in the water phase due to the higher hydrophilicity of the surface layer TiO 2. Under the induction of ultraviolet light, tiO 2 molecules on the surface layer can generate electron hole pairs by TiO 2, so that hydroxyl radicals are generated with H 2 O or O 2 adsorbed on the surface of the coating, the hydroxyl radicals have high activity, the stains on the surface of the coating are promoted to undergo decomposition reaction, and finally organic matters are decomposed into substances such as CO 2、H2O、H2SO4、HNO3 which are easy to wash; moreover, the super-amphiphilic surface formed by the TiO 2 also makes the decomposed substances easier to wash and clean. Meanwhile, the inner fluororubber particle structure can also endow the coating with excellent high temperature resistance and elasticity.
According to the present invention, preferably, in step (1), the first solvent is ethyl acetate;
the initiator is an acyl phosphine oxide compound, preferably 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide;
The first dispersing agent is sulfate;
0.5-2.0 parts of initiator, 1.0-3.0 parts of trichloroisocyanuric acid, 1.0-2.0 parts of 2-mercaptobenzimidazole, 50-150 parts of first solvent, 2-5 parts of first dispersant and 0.1-1 part of 1, 4-dithiothreitol;
Preferably, the initiator, trichloroisocyanuric acid, 2-mercaptobenzimidazole and the first solvent are stirred and mixed for 25-35min at 45-55 ℃ to obtain a mixed solution; then, adding the first dispersing agent and 1, 4-dithiothreitol into the mixed solution, and stirring and mixing uniformly at 60-65 ℃ to obtain the fluororubber treating agent.
According to the present invention, preferably, in the step (2), the second solvent is methyl isobutyl ketone;
The fluororubber comprises, by mass, 20-200 parts of fluororubber, 300-500 parts of a second solvent, 10-50 parts of a fluororubber treating agent and 5-60 parts of nano TiO 2 powder.
According to the invention, in the step (2), preferably, the crushed fluororubber and the second solvent are stirred and mixed for 1-1.5 hours at 45-55 ℃, then the fluororubber treating agent is added, stirring is continued for 10-20 minutes at 45-55 ℃, nano TiO 2 powder is added again, stirring is continued for 1-1.5 hours at 45-55 ℃, and finally vacuum defoaming is carried out at 80-90 ℃ to obtain the self-cleaning agent.
In the present invention, the solvent is removed by vacuum deaeration.
A second aspect of the present invention provides a self-cleaning agent prepared by the above-described preparation method.
A third aspect of the present invention provides the use of the self-cleaning agent described above in an aqueous asphalt waterproofing paint.
A fourth aspect of the present invention provides a self-cleaning aqueous asphalt waterproofing paint comprising: emulsion, emulsified asphalt, the self-cleaning agent, a second dispersant, a defoamer, a thickener, a filler, water and optionally a pigment.
According to the present invention, preferably, the waterproof paint comprises, in parts by mass: 200-300 parts of emulsion, 40-80 parts of emulsified asphalt, 10-30 parts of self-cleaning agent according to claim 5, 1-4 parts of second dispersant, 0.2-0.6 part of defoamer, 0.8-2.0 parts of thickener, 80-100 parts of filler, 10-30 parts of water and 0-5 parts of optional pigment.
According to the present invention, preferably, the emulsion is an aqueous styrene-butadiene latex;
the emulsified asphalt is anionic emulsified asphalt;
the second dispersant is ammonium polyacrylate;
The defoaming agent is an organosilicon defoaming agent;
The thickener is alkali swelling thickener;
the filler is heavy calcium powder.
A fifth aspect of the present invention provides a method for producing the above waterproof paint, comprising: and uniformly mixing the emulsion, emulsified asphalt, the self-cleaning agent, the second dispersing agent, the defoaming agent, the thickening agent, the filler, water and optional pigment to obtain the waterproof coating.
The technical scheme of the invention has the following beneficial effects:
(1) The invention effectively solves the problems of outdoor construction of the water-based asphalt waterproof paint, and easy adsorption of dust and greasy dirt on the coating.
(2) According to the invention, the tensile property, heat resistance and dust and dirt resistance of the coating can be obviously improved by improving the content of the self-cleaning agent adsorbed on the surface of the fluororubber to TiO 2. The fluororubber has poor low temperature resistance, the integrity of the molecular structure of the self-cleaning agent is better maintained by improving the test temperature, and meanwhile, the decomposition rate of the fluororubber surface TiO 2 on pollution sources such as dust, oil stains and the like is also accelerated, so that the construction in summer is more favorable for keeping the clean and tidy degree of the surface of the coating compared with the construction in winter. But can solve the problem of reduced dustproof and dirt-resistant performance of the coating in winter construction by increasing the content of the self-cleaning agent.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention is further illustrated by the following examples:
In the following examples and comparative examples:
The 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide used was purchased from MERCK chemical company;
the first dispersant is sulfate salt of the Sichuan chemical industry, and the brand is D-510;
the fluororubber is selected from new plastic melting material, and has the trade mark LT-302;
The emulsion is selected from Jin Jia New Material science and technology Co., ltd, and the water-based styrene-butadiene latex emulsified asphalt with the trade mark Ligos 3603 is commercial anionic emulsified asphalt;
The second dispersant is ammonium polyacrylate; purchased from Pick corporation under the brand BYK-190;
the defoaming agent is a medium-federal organic silicon defoaming agent, and the brand is B-313;
the thickener is alkali swelling thickener of Rogowski company, and the brand is ASE-60;
The filler is heavy calcium powder of Chicheng Hongxin mining Co, 400 meshes;
The pigment is selected from red iron color paste with the brand of R4101-SA by adding Hongjia material technology;
Example 1
Preparation of fluororubber treating agent: adding 1 part of initiator, 2 parts of trichloroisocyanuric acid and 1.5 parts of 2-mercaptobenzimidazole into 100 parts of ethyl acetate by mass, and stirring and mixing for 30min at 50 ℃ to obtain a mixed solution; then, sequentially adding 3 parts of a first dispersing agent and 0.5 part of 1, 4-dithiothreitol into the mixed solution, increasing the reaction temperature to 60 ℃, continuously stirring until the mixture is uniform, and then standing and cooling to room temperature to obtain a fluororubber treating agent; wherein the initiator is 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide;
Preparation of self-cleaning agent with TiO 2 adsorbed on the surface of fluororubber: chopping 50 parts of fluororubber into 400 parts of methyl isobutyl ketone, continuously stirring and heating for 1h at 50 ℃, adding 20 parts of prepared fluororubber treating agent into the solution, continuously stirring for 15min at 50 ℃, adding 25 parts of nano TiO 2 powder into the solution, and continuously stirring for 1h at 50 ℃; finally, the methyl isobutyl ketone solvent and ethyl acetate were removed by vacuum degassing at 80℃to give a solid (self-cleaning agent) which was viscous at room temperature. Wherein the average particle size of the nano TiO 2 powder is 100nm.
Example 2
Uniformly mixing 200 parts of emulsion, 50 parts of emulsified asphalt, 20 parts of water, 4 parts of red pigment and 2 parts of second dispersing agent in parts by weight, and shearing and dispersing for 30min at 500rpm under a mechanical stirrer; the rotation speed is increased to 800rpm, 90 parts of filler and 10 parts of self-cleaning agent with TiO 2 adsorbed on the surface of the fluororubber prepared in the example 1 are added, and the mixture is stirred for 40min; adding 0.5 part of defoaming agent, reducing the rotation speed to 500rpm, stirring for 20min, and reducing the rotation speed to 300rpm, stirring for 5min; and (3) uniformly premixing the thickener and distilled water in advance according to the mass ratio of 1:1, adding 3 parts of diluted thickener into the solution, and discharging after the reaction for 40min at the speed of 800rpm, thereby obtaining the self-cleaning water-based asphalt waterproof paint.
Example 3
Uniformly mixing 200 parts of emulsion, 50 parts of emulsified asphalt, 20 parts of water, 4 parts of red pigment and 2 parts of second dispersing agent in parts by weight, and shearing and dispersing for 30min at 500rpm under a mechanical stirrer; the rotation speed is increased to 800rpm, 90 parts of filler and 20 parts of self-cleaning agent with TiO 2 adsorbed on the surface of the fluororubber prepared in the example 1 are added, and the mixture is stirred for 40min; adding 0.5 part of defoaming agent, reducing the rotation speed to 500rpm, stirring for 20min, and reducing the rotation speed to 300rpm, stirring for 5min; and (3) uniformly premixing the thickener and distilled water in advance according to the mass ratio of 1:1, adding 3 parts of diluted thickener into the solution, and discharging after the reaction for 40min at the speed of 800rpm, thereby obtaining the self-cleaning water-based asphalt waterproof paint.
Example 4
Uniformly mixing 200 parts of emulsion, 50 parts of emulsified asphalt, 20 parts of water, 4 parts of red pigment and 2 parts of second dispersing agent in parts by weight, and shearing and dispersing for 30min at 500rpm under a mechanical stirrer; the rotation speed is increased to 800rpm, 90 parts of filler and 30 parts of self-cleaning agent with TiO 2 adsorbed on the surface of the fluororubber prepared in the example 1 are added, and the mixture is stirred for 40min; adding 0.5 part of defoaming agent, reducing the rotation speed to 500rpm, stirring for 20min, and reducing the rotation speed to 300rpm, stirring for 5min; and (3) uniformly premixing the thickener and distilled water in advance according to the mass ratio of 1:1, adding 3 parts of diluted thickener into the solution, and discharging after the reaction for 40min at the speed of 800rpm, thereby obtaining the self-cleaning water-based asphalt waterproof paint.
Example 5
Uniformly mixing 250 parts of emulsion, 50 parts of emulsified asphalt, 10 parts of water, 4 parts of red pigment and 2 parts of second dispersing agent in parts by weight, and shearing and dispersing for 30min at 500rpm under a mechanical stirrer; the rotation speed is increased to 800rpm, 90 parts of filler and 10 parts of self-cleaning agent with TiO 2 adsorbed on the surface of the fluororubber prepared in the example 1 are added, and the mixture is stirred for 40min; adding 0.5 part of defoaming agent, reducing the rotation speed to 500rpm, stirring for 20min, and reducing the rotation speed to 300rpm, stirring for 5min; and (3) uniformly premixing the thickener and distilled water in advance according to the mass ratio of 1:1, adding 3 parts of diluted thickener into the solution, and discharging after the reaction for 40min at the speed of 800rpm, thereby obtaining the self-cleaning water-based asphalt waterproof paint.
Comparative example 1
Uniformly mixing 200 parts of emulsion, 50 parts of emulsified asphalt, 20 parts of water, 4 parts of red pigment and 2 parts of second dispersing agent in parts by weight, and shearing and dispersing for 30min at 500rpm under a mechanical stirrer; increasing the rotation speed to 800rpm, adding 90 parts of filler, and stirring for 40min; adding 0.5 part of defoaming agent, reducing the rotation speed to 500rpm, stirring for 20min, and reducing the rotation speed to 300rpm, stirring for 5min; and (3) uniformly premixing the thickener and distilled water in advance according to the mass ratio of 1:1, adding 3 parts of diluted thickener into the solution, and discharging after the rotation speed is increased to 800rpm for reaction for 40min to obtain the water-based asphalt waterproof coating.
Test example 1
The water-based asphalt waterproof coatings prepared in examples 2 to 5 and comparative example 1 were subjected to performance test, and specific test results are shown in the following table. Wherein, the tensile strength is tested according to JC/T408-2005 product standard; the heat resistance limit test method refers to JC/T408-2005 product standard 5.6: and preparing a heat-resistant test piece by using the paint, vertically hanging the test piece in an 80 ℃ blast drying oven for 5 hours, then heating the test piece for 10 degrees every 1 hour, observing the surface condition of the test piece, and recording the heat-resistant limit value.
TABLE 1
Test example 2
The water-based asphalt waterproof paint prepared in examples 2 to 5 and comparative example 1 was subjected to dust-proof performance test by the following method: the coating is respectively carried out by using the coatings, demoulding is carried out after the films are dried, each coating is respectively cut into a small piece of film with the area of 50mm multiplied by 50mm (remark: the experiment is that a wet film is prepared in a metal mold frame with the depth of 2mm, the surface of the wet film is smoothed by a scraper, a film with uniform thickness can be obtained after drying and curing, the specific method standard is referred to GB/T16777-2008, so that the quality of the film can be guaranteed to be the same as long as the cut film has the same area), and the quality m 0 of the film is measured by an analytical balance. Then placing the mixture in a same polluted surface dish, and standing the mixture in a curing room for 6 hours in the daytime. Taking out and measuring the mass m 1.m1-m0 of the polluted film by using an analytical balance as the mass of a pollution source, and quantitatively analyzing the severity of the pollution of the film.
TABLE 2
| Project | Comparative example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Film quality m 0/g | 4.5005 | 4.5001 | 4.5004 | 4.5001 | 4.5008 |
| Contaminated film quality m 1/g | 4.5424 | 4.5301 | 4.5118 | 4.5044 | 4.5309 |
| Pollution source mass m 1-m0/g | 0.0419 | 0.0300 | 0.0114 | 0.0043 | 0.0301 |
The results showed that the paint added with 30 parts of self-cleaning agent had the best dust-proof performance.
Test example 3
The water-based asphalt waterproof coatings prepared in examples 2 to 5 and comparative example 1 were subjected to oil stain resistance test by the following method: the coating is respectively carried out by using the coatings, demoulding is carried out after the films are dried, each coating is respectively cut into a small piece of film with the area of 50mm multiplied by 50mm (remark: the experiment is that a wet film is prepared in a metal mold frame with the depth of 2mm, the surface of the wet film is smoothed by a scraper, a film with uniform thickness can be obtained after drying and curing, the specific method standard is referred to GB/T16777-2008, so that the quality of the film can be guaranteed to be the same as long as the cut film has the same area), and the quality m 0 of the film is measured by an analytical balance. 1g of edible oil drop is sucked by a colloid dropper on the surface of the film and transferred into the same clean surface dish, and the edible oil drop is placed in a curing room for 6 hours in daytime. Taking out and measuring the mass m 1.m0+1-m1 of the polluted film by using an analytical balance as the mass of the decomposed pollution source, and quantitatively analyzing the self-cleaning capability of the film.
TABLE 3 Table 3
| Project | Comparative example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Film quality m 0/g | 4.5007 | 4.5002 | 4.5009 | 4.5010 | 4.5004 |
| Contaminated film quality m 1/g | 5.4971 | 5.1251 | 4.9521 | 4.6311 | 5.1250 |
| Mass m 0+1-m1/g of decomposed pollution source | 0.0036 | 0.3751 | 0.5488 | 0.8699 | 0.3754 |
The results show that the paint added with 30 parts of self-cleaning agent has optimal oil stain resistance.
Test example 4
Coating film by using the coating of example 2, demoulding after the film is dried, then cutting a small piece of film with the area of 50mm multiplied by 50mm (note: the experiment prepares a wet film in a metal mold frame with the depth of 2mm, and screeds the surface of the wet film by a scraper, and a film with uniform thickness can be obtained after drying and curing, and the specific method standard is referred to GB/T16777-2008, so that the quality of the film can be guaranteed to be the same as long as the cut film has the same area), and the mass m 0 of the film is measured by an analytical balance. Then weighing 0.5g of dust and 1g of edible oil respectively, placing the surfaces of the films on a clean surface dish, firstly placing the surfaces in a low-temperature box at-15 ℃ for 2 hours, taking out the film weighing mass m 1, then heating to-10 ℃ and keeping the temperature at-5 ℃ for 2 hours, and taking out the film weighing mass m 2、m3 respectively after the constant temperature is finished. Then transferring to an electrothermal constant temperature blast drying oven for 2 hours at 20 ℃,30 ℃ and 40 ℃, and respectively taking out the film after the constant temperature is finished to weigh the mass m 4、m5、m6.mx-1-mx (x=2, 3,4, 5 and 6) as the mass of the pollution source decomposed under different constant temperature conditions. And quantitatively analyzing the influence of temperature factors on the dustproof and oilproof performance of the coating.
TABLE 4 Table 4
| Temperature/. Degree.C | -15 | -10 | -5 | 20 | 30 | 40 | |
| Film quality m 0/g | 4.5005 | — | — | — | — | — | — |
| Contaminated film quality m x/g | 6.0005 | 5.9922 | 5.8900 | 5.7724 | 5.4320 | 4.9991 | 4.5100 |
| Mass m of decomposed pollution source x-1-mx | 0 | 0.0083 | 0.1022 | 0.1176 | 0.3404 | 0.4329 | 0.4891 |
The results show that the higher the surface temperature, the more advantageous it is to promote the decomposition of the pollution source by the self-cleaning agent.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. The preparation method of the self-cleaning agent is characterized by comprising the following steps:
(1) Uniformly mixing an initiator, trichloroisocyanuric acid, 2-mercaptobenzimidazole and a first solvent to obtain a mixed solution; then, adding a first dispersing agent and 1, 4-dithiothreitol into the mixed solution, and uniformly stirring and mixing to obtain a fluororubber treating agent;
(2) Stirring and mixing the crushed fluororubber and the second solvent, then adding the fluororubber treating agent, continuing stirring, adding nano TiO 2 powder again, continuing stirring, and finally carrying out vacuum defoaming to obtain the self-cleaning agent.
2. The production method according to claim 1, wherein in the step (1), the first solvent is ethyl acetate;
the initiator is an acyl phosphine oxide compound, preferably 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide;
The first dispersing agent is sulfate;
0.5-2.0 parts of initiator, 1.0-3.0 parts of trichloroisocyanuric acid, 1.0-2.0 parts of 2-mercaptobenzimidazole, 50-150 parts of first solvent, 2-5 parts of first dispersant and 0.1-1 part of 1, 4-dithiothreitol;
Preferably, the initiator, trichloroisocyanuric acid, 2-mercaptobenzimidazole and the first solvent are stirred and mixed for 25-35min at 45-55 ℃ to obtain a mixed solution; then, adding the first dispersing agent and 1, 4-dithiothreitol into the mixed solution, and stirring and mixing uniformly at 60-65 ℃ to obtain the fluororubber treating agent.
3. The production process according to claim 1, wherein in the step (2), the second solvent is methyl isobutyl ketone;
The fluororubber comprises, by mass, 20-200 parts of fluororubber, 300-500 parts of a second solvent, 10-50 parts of a fluororubber treating agent and 5-60 parts of nano TiO 2 powder.
4. The preparation method of claim 1, wherein in the step (2), the crushed fluororubber and the second solvent are stirred and mixed for 1-1.5 hours at 45-55 ℃, then the fluororubber treating agent is added, stirring is continued for 10-20 minutes at 45-55 ℃, nano TiO 2 powder is added again, stirring is continued for 1-1.5 hours at 45-55 ℃, and finally vacuum defoaming is performed at 80-90 ℃ to obtain the self-cleaning agent.
5. A self-cleaning agent prepared by the preparation method according to any one of claims 1 to 4.
6. Use of the self-cleaning agent according to claim 5 in water-borne asphalt waterproofing paint.
7. The self-cleaning water-based asphalt waterproof paint is characterized by comprising the following components: emulsion, emulsified asphalt, the self-cleaning agent of claim 5, a second dispersant, an antifoaming agent, a thickener, a filler, water, and optionally a pigment.
8. The waterproof coating material according to claim 7, wherein the waterproof coating material comprises, in parts by mass: 200-300 parts of emulsion, 40-80 parts of emulsified asphalt, 10-30 parts of self-cleaning agent according to claim 5, 1-4 parts of second dispersant, 0.2-0.6 part of defoamer, 0.8-2.0 parts of thickener, 80-100 parts of filler, 10-30 parts of water and 0-5 parts of optional pigment.
9. The waterproof coating according to claim 8, wherein the emulsion is an aqueous styrene-butadiene latex;
the emulsified asphalt is anionic emulsified asphalt;
the second dispersant is ammonium polyacrylate;
The defoaming agent is an organosilicon defoaming agent;
The thickener is alkali swelling thickener;
the filler is heavy calcium powder.
10. A method for producing the waterproof paint according to any one of claims 7 to 9, characterized in that the method comprises: the emulsion, emulsified asphalt, the self-cleaning agent, the second dispersing agent, the defoaming agent, the thickening agent, the filler, water and optional pigment according to claim 5 are uniformly mixed to obtain the waterproof coating.
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