CN112625582A - Chlorine ion permeation resistant flexible fluororesin coating for concrete surface and preparation method thereof - Google Patents
Chlorine ion permeation resistant flexible fluororesin coating for concrete surface and preparation method thereof Download PDFInfo
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- CN112625582A CN112625582A CN202011363881.5A CN202011363881A CN112625582A CN 112625582 A CN112625582 A CN 112625582A CN 202011363881 A CN202011363881 A CN 202011363881A CN 112625582 A CN112625582 A CN 112625582A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
Abstract
The invention discloses a chloride ion permeation resistant flexible fluororesin coating for a concrete surface and a preparation method thereof, belonging to the field of coatings. The component A of the method comprises a wetting dispersant, a rheological additive, a coloring weather-resistant pigment, modified surface treatment bismuth oxide, an organic solvent, fluororesin with medium hydroxyl content, modified polyol, a leveling agent and a defoaming agent, and the component B comprises a solvent, a dehydrating agent and an isocyanate curing agent. The chlorine ion permeation resistant flexible fluororesin coating for the concrete surface disclosed by the invention has the advantages of high fluorine content, super-long weather resistance, stain resistance, high elongation at break of the coating, high tensile strength, good chlorine ion permeation resistance and capability of keeping flexibility for a long time after the coating is aged.
Description
Technical Field
The invention relates to the field of coatings, in particular to a chloride ion permeation resistant flexible fluororesin coating for a concrete surface and a preparation method thereof.
Background
According to incomplete statistics, the risk hydraulic engineering in the hydraulic engineering of China approximately accounts for 50% of the total engineering amount, and the corrosion of the steel bars is one of the main diseases of the hydraulic engineering: according to investigation on the use and damage conditions of coastal harbor projects in China, the structural damage phenomena of harbors and ocean projects are very serious and common, the upper concrete structure of a splash zone which is used for more than 10 years generates serious cracking phenomena due to steel bar corrosion, and the corrosion of engineering steel bars in coastal hydraulic projects is mainly caused by chlorine salt pollution. In inland highway and bridge engineering, concrete deterioration conditions of concrete structures in expressways, high-speed rails and urban overpasses caused by chlorine salts such as snow-melting agents and urban pollution are quite common, and the concrete deterioration conditions are a very prominent disastrous problem, and the concrete deterioration conditions are mainly caused by corrosion of the chlorine salts on steel bars in concrete.
At present, the systematic research of the design of the bridge durability in the marine environment in China has the problems of incompleteness and the like, and the large engineering structures built in China are gradually increased. These engineering structural durability technical practices show that: in order to ensure the durability and service life of the reinforced concrete structure in large-scale engineering, comprehensive consideration needs to be taken from multiple aspects such as technology, economy and the like, for example, measures such as adopting high-performance concrete (marine concrete), special steel bars (galvanized steel bars and epoxy coating steel bars), a steel bar rust inhibitor, surface silane impregnation, surface coating protection and the like are adopted. The scheme of the concrete anti-corrosion surface coating is easy to implement, the operation and maintenance after the concrete anti-corrosion surface coating is put into use are convenient, the problems are easy to find and repair in time, the appearance effects such as different colors and the like can be given to the surface of the concrete in cities and bridges, and the protective performance and the decorative performance are both provided. Because concrete belongs to strong alkaline building materials, the adopted coating has good alkali resistance, adhesiveness and corrosion resistance, and fluorocarbon coating, epoxy resin coating and the like are commonly used.
The main film forming material of fluorocarbon coatings is fluororesin, which is generally a polymer with a molecular main chain or a side chain containing fluorine-carbon bonds (F-C), is fluorocarbon resin and is prepared from fluorine-containing monomers, such as: tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride and the like are prepared through homopolymerization or copolymerization. The fluorine-carbon bond has high bond energy, so that the fluororesin anti-corrosion coating has good physical and chemical stability. The fluororesin coating has strong ultraviolet resistance, excellent chemical stability, outstanding stain resistance and self-cleaning property, good temperature change resistance and strong outdoor weather resistance. The manual accelerated aging experiment proves that the gloss retention rate of the coating is still over 80 percent after 3000h experiment, the coating is kept complete, and the phenomena of cracking and pulverization can not occur. The flexible fluorocarbon coating has the advantages of high tensile strength and high elongation at break besides the advantages of common fluorocarbon coatings, and can be used for coating the surfaces of marine concrete and concrete of sea-crossing bridges.
At present, some enterprises have continuously proposed flexible fluorocarbon coatings, but the products still have more technical defects, mainly: 1) when the coating prepared by the coating is used in a corrosive environment, the elongation at break and the tensile strength are reduced after ultraviolet exposure and environmental aging, and the long-term durability of concrete cannot be protected; 2) the chloride ion penetration resistance of the coating is insufficient, and the chloride ion penetration cannot be efficiently prevented in the coating structure for protecting the concrete, so that the reinforcing steel bar is corroded early and the concrete is degraded.
Disclosure of Invention
The invention aims to provide a chlorine ion permeation resistant flexible fluororesin coating for a concrete surface and a preparation method thereof, wherein the coating is a two-component normal-temperature curing fluororesin product and has the technical advantages of high fluorine content, super-long weather resistance, stain resistance, high elongation at break of a coating, high tensile strength, good chlorine ion permeation resistance, capability of keeping flexibility (elongation at break, tensile strength) after the coating is aged and the like.
The purpose of the invention can be realized by the following technical scheme:
a flexible fluororesin coating for resisting chloride ion permeation for a concrete surface comprises a component A and a component B;
the component A comprises the following components:
the component B comprises the following components:
80-99 parts of isocyanate curing agent
0.5 to 1 portion of dehydrating agent
1-20 parts of an organic solvent;
the component A and the component B are mixed according to the proportion of 100: (1-20) in the ratio.
In some preferred technical schemes, the components of the flexible fluororesin coating for resisting the chloride ion permeation on the surface of the concrete are as follows:
the component A comprises the following components:
the component B comprises the following components:
80-98 parts of isocyanate curing agent
0.5 to 1 portion of dehydrating agent
1-10 parts of an organic solvent;
the component A and the component B are mixed according to the proportion of 100: (10-15) in the above ratio.
The technical scheme of the invention is as follows: the modified polyol is prepared by the following method:
s1: adding acetone, dibutyltin dilaurate and a reactive ultraviolet absorber Chiguard R-455 into a reaction kettle, and stirring at the speed of 500rpm to completely dissolve the materials to form clear transparent liquid;
s2: adding polyether glycol and heating to 60-85 ℃; slowly adding hexamethylene diisocyanate at the temperature, and reacting for 3-5h at the temperature to obtain the modified polyether polyol.
The preparation method of the modified polyol comprises the following steps: the polyether polyol is trifunctional polyether polyol with the molecular weight of 4000-5500;
the preparation method of the modified polyol comprises the following steps: acetone, dibutyltin dilaurate, a reactive ultraviolet absorber Chiguard R-455, polyether polyol and hexamethylene diisocyanate, wherein the mass of the polyether polyol and the hexamethylene diisocyanate is 8-12: 0.005-0.015: 7-13: 65-80: 4-8; preferably: acetone, dibutyltin dilaurate, a reactive ultraviolet absorber Chiguard R-455, polyether polyol and hexamethylene diisocyanate, wherein the mass of the polyether polyol and the hexamethylene diisocyanate is 9.5-10.5: 0.005-0.015: 7-13: 70-80: 4 to 8.
The technical scheme of the invention is as follows: the modified surface treated bismuth oxide is prepared by the following method:
s1: adding bismuth oxide powder into a ball milling kettle, adding a sodium silicate solution, carrying out coating reaction, uniformly grinding until the screen residue rate of a 325-mesh screen is less than or equal to 2%, and discharging for later use;
s2: carrying out reheating reaction on the bismuth oxide powder obtained after the treatment of S1 at the temperature of 180-210 ℃, wherein the reaction time is 5-6.5h, and after the reaction is finished, carrying out water washing and drying;
s3: adding the dried bismuth oxide powder into a ball milling kettle, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, uniformly grinding, and discharging to obtain the modified surface treated bismuth oxide.
The preparation method of the modified surface treated bismuth oxide comprises the following steps: the mass of the bismuth oxide, the sodium silicate solution and the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is 90-98: 1-8: 1-5; preferably: the mass of the bismuth oxide, the sodium silicate solution and the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is 93-97 percent: 2-6: 1 to 5.
The technical scheme of the invention is as follows: in the component A:
the fluororesin with medium hydroxyl content is LUMIFLON LF-600X fluororesin from AGC company;
the wetting dispersant is Pic DISPERBYK-163 or Pic DISPERBYK-2025;
the coloring weather-resistant pigment is one or more of rutile titanium dioxide, medium pigment carbon black, phthalocyanine blue, iron oxide red and iron oxide yellow;
the defoaming agent is bike BYK-066N or bike BYK-1790;
the leveling agent is ByK-323 or ByK-331;
the rheological additive is
R972 gas phaseSilicon dioxide;
the organic solvent is prepared from the following components in a mass ratio of 1-5: 1-5: 1-5 of propylene glycol methyl ether acetate, butyl acetate and xylene.
The technical scheme of the invention is as follows: in the component B: the isocyanate curing agent is Asahikaseie402-90T, AsahiKASEIE405-80T and degussa T1890E alicyclic polyisocyanate curing agents, and the mass of the three is 50-65: 20-40: 5-15.
The technical scheme of the invention is as follows: in the component B: the dehydrating agent is FL-180 dehydrating agent, and the organic solvent is butyl acetate.
A preparation method of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface comprises the following steps:
the preparation method of the component A comprises the following steps:
adding a wetting dispersant, a rheological aid, a coloring weather-resistant pigment, modified surface treatment bismuth oxide, an organic solvent accounting for 30-80% of the formula amount and a medium hydroxyl content fluororesin accounting for 20-40% of the formula amount into a grinding kettle, grinding until the fineness is less than or equal to 20 mu m, adding the residual medium hydroxyl content fluororesin, modified polyol, a leveling agent, a defoaming agent and the residual organic solvent accounting for the formula amount, mixing and stirring uniformly at the speed of 400-600 rpm to obtain the component A of the chloride ion permeation resistant flexible fluororesin coating for the concrete surface.
The preparation method of the component B comprises the following steps:
adding solvent and dehydrating agent into a paint mixing kettle, and introducing N2And (3) protecting, namely mixing at a stirring speed of 400-600 rpm for 1-10 min, standing for 1h, adding an isocyanate curing agent, and mixing at a stirring speed of 400-600 rpm for 5-15 min to obtain the component B of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface.
And mixing the component A and the component B to obtain the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface.
The invention has the beneficial effects that:
firstly, high weather-proof and flexible fluororesin is adopted, polyether polyol is modified, flexible aliphatic isocyanate curing agent is matched with IPDI modified alicyclic isocyanate curing agent with proper amount, so that the characteristics of high breaking elongation and high tensile strength of the coating at normal temperature and low temperature are ensured, and meanwhile, the hardness and the wear resistance of the coating are improved. Secondly, the polyether glycol is modified by adopting the reactive ultraviolet absorber, so that the problem that the elongation at break and the tensile strength of the coating in the modified fluororesin coating are reduced after the coating is aged under the outdoor environment is solved on the premise of keeping the flexibility of the original coating, the flexibility of the coating coated on the surface of the concrete after the coating is aged under the outdoor environment is improved, and the coating can keep high elongation at break and tensile strength for a long time. Thirdly, by adding the bismuth oxide subjected to the surface treatment of sodium silicate and silane modification, a high-efficiency, slow-release and long-acting chloride ion blocking environment is formed in the coating. In the seawater or high-chloride corrosion environment, the bismuth oxide modified by sodium silicate can dissolve low-concentration trivalent bismuth ions, the trivalent bismuth ions and chloride ions in the coating diffusion channel generate bismuth oxychloride precipitation, and the formed coating diffusion channel is filled, so that the diffusion, permeation and migration of the chloride ions in the coating are effectively delayed. Meanwhile, as the silane modified surface treatment is carried out, the binding force of bismuth oxide, fluororesin and concrete base material in the coating is better, the effective barrier to chloride ion diffusion channels can be improved, and the chloride ion permeation resistance of the coating is improved.
The chlorine ion permeation resistant flexible fluororesin coating for the concrete surface disclosed by the invention has the advantages of high fluorine content, super-long weather resistance, stain resistance, high elongation at break of the coating, high tensile strength and good chlorine ion permeation resistance, and can keep flexibility (elongation at break and tensile strength) for a long time after the coating is aged.
Detailed description of the invention
The invention is further described with reference to the following examples, but the scope of the invention is not limited thereto:
the sodium silicate solution in the embodiment of the invention adopts SIGMA-ALDRICH, V900199-500G.
The preparation procedure of the chlorine ion permeation resistant flexible fluororesin coatings for concrete surfaces of examples 1 to 4 and comparative examples 1 to 4 was as follows (the material ratios are shown in Table 1)
(1) Preparation of modified polyol:
adding acetone, dibutyltin dilaurate and a reactive ultraviolet absorber Chiguard R-455 into a reaction kettle, stirring at the speed of 500rpm to completely dissolve the materials to form a clear transparent liquid, then adding polyether glycol, and heating to 75 ℃; and (3) dropwise adding hexamethylene diisocyanate at the temperature, and reacting for 3.5 hours at the temperature to obtain the modified polyether polyol.
(2) Preparation of modified surface treated bismuth oxide:
adding bismuth oxide powder into a ball milling kettle, adding a sodium silicate solution, carrying out coating reaction, uniformly grinding until the screen residue rate of a 325-mesh screen is less than or equal to 2%, and discharging for later use; carrying out reheating reaction on the treated bismuth oxide powder at 190 ℃, wherein the reaction time is 5.5h, and after the reaction is finished, washing and drying the bismuth oxide powder; adding the dried bismuth oxide powder into a ball milling kettle, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, uniformly grinding, and discharging to obtain the modified surface treated bismuth oxide.
(3) Preparing a component A of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface: adding a wetting dispersant, a rheological aid, a coloring weather-resistant pigment, modified surface treatment bismuth oxide, 50 percent of organic solvent in formula amount and 30 percent of medium hydroxyl content fluororesin into a grinding kettle, grinding to the fineness of less than or equal to 20 mu m, adding the residual medium hydroxyl content fluororesin in formula amount, modified polyol, a leveling agent, a defoaming agent and the residual organic solvent in formula amount, mixing and stirring uniformly at the speed of 500rpm to obtain the component A of the chloride ion permeation resistant flexible fluororesin coating for the concrete surface.
(4) Preparing a component B of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface: adding solvent and dehydrating agent into a paint mixing kettle, and introducing N2And (3) protecting, namely mixing at a stirring speed of 500rpm for 5min, standing for 1h, adding an isocyanate curing agent, and mixing at a stirring speed of 500rpm for 10min to obtain the component B of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface.
TABLE 1.1 amounts (g) of materials added in examples 1 to 4
TABLE 1.2 addition amounts (g) of materials in comparative examples 1 to 4
TABLE 2.1 Main technical indices of chlorine ion permeation resistant flexible fluororesin coating for concrete surface (examples 1 to 4)
TABLE 2.2 Main technical indices of the chlorine ion permeation resistant flexible fluororesin coating for concrete surface (comparative examples 1 to 4)
TABLE 2.3 test standards for chloride ion permeation resistant Flexible fluororesin coatings for concrete surfaces
Test results show that the chlorine ion permeation resistant flexible fluororesin finish paint for the concrete surface, which has the advantages of super-long weather resistance, stain resistance, high elongation at break of the coating, high tensile strength, good chlorine ion permeation resistance and long-term flexibility (elongation at break and tensile strength) after the coating is aged, is obtained in the examples 1 to 4.
Comparative example 4 the results of the tests show that the coating has insufficient chloride ion permeability resistance in the formulation without bismuth oxide. The chloride ions have extremely strong permeability, and the diffusion of the chloride ions in a coating channel cannot be effectively prevented without precipitation combination of trivalent bismuth ions; the test result of the comparative example 3 shows that the bismuth oxide without surface treatment is used as the component of the chloride ion combined precipitate, when the coating starts to serve in the environment, the chloride ion permeation resistant effect similar to the technical scheme can be achieved, but because the dissolution rate of trivalent bismuth ions in water of the unmodified coated bismuth oxide is too high, the bismuth oxide is consumed after being combined with chloride ions in a short period, and the chloride ion permeation rate of the coating is greatly increased in the port environment after 1 a; meanwhile, experiments show that when the addition of bismuth oxide is independently increased without performing modified surface treatment on the bismuth oxide, the elongation at break and the low-temperature flexibility of the coating are reduced.
The test result of the comparative example 2 shows that after the proportion of the flexible curing agent and the IPDI modified alicyclic isocyanate curing agent in the component B is changed, the rigidity of the coating is improved, the hardness is increased, but the tensile strength and the elongation at break are also obviously reduced; meanwhile, the rigid coating has insufficient protection on concrete microcracks, so that the protection performance of the coating is reduced more easily, and the defect of high chloride ion permeability is caused.
The test result of comparative example 1 shows that the polyether polyol scheme which is not modified by the ultraviolet absorbent can achieve similar effects of elongation at break, low-temperature flexibility and chloride ion permeation resistance in the conventional performance test as the technical scheme, but the polyether polyol resin which is used as the toughening additive is not modified by the reactive ultraviolet absorbent, so that the light resistance and weather resistance are poor, after the coating aging test, the tensile strength and elongation at break of the coating are obviously reduced compared with those before the aging test, and simultaneously, the flexibility of the coating is deteriorated, so that microcracks generated by concrete cannot be effectively resisted, and the reduction of the chloride ion permeation resistance is caused.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The chloride ion permeation resistant flexible fluororesin coating for the concrete surface is characterized by comprising the following components in parts by weight: the coating comprises a component A and a component B;
the component A comprises the following components:
the component B comprises the following components:
80-99 parts of isocyanate curing agent
0.5 to 1 portion of dehydrating agent
1-20 parts of an organic solvent;
the component A and the component B are mixed according to the proportion of 100: (1-20) in the ratio.
2. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that:
the component A comprises the following components:
the component B comprises the following components:
80-98 parts of isocyanate curing agent
0.5 to 1 portion of dehydrating agent
1-10 parts of an organic solvent;
the component A and the component B are mixed according to the proportion of 100: (10-15) in the above ratio.
3. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that: the modified polyol is prepared by the following method:
s1: adding acetone, dibutyltin dilaurate and a reactive ultraviolet absorbent Chiguard R-455 into a reaction kettle, and stirring to completely dissolve the materials to form clear and transparent liquid;
s2: adding polyether glycol and heating to 60-85 ℃; slowly adding hexamethylene diisocyanate at the temperature, and reacting for 3-5h at the temperature to obtain the modified polyether polyol.
4. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 3, characterized in that: the polyether polyol is trifunctional polyether polyol with the molecular weight of 4000-5500;
preferably: acetone, dibutyltin dilaurate, a reactive ultraviolet absorber Chiguard R-455, polyether polyol and hexamethylene diisocyanate, wherein the mass of the polyether polyol and the hexamethylene diisocyanate is 8-12: 0.005-0.015: 7-13: 65-80: 4-8; further preferably: acetone, dibutyltin dilaurate, a reactive ultraviolet absorber Chiguard R-455, polyether polyol and hexamethylene diisocyanate, wherein the mass of the polyether polyol and the hexamethylene diisocyanate is 9.5-10.5: 0.005-0.015: 7-13: 70-80: 4 to 8.
5. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that: the modified surface treated bismuth oxide is prepared by the following method:
s1, adding bismuth oxide powder into a ball milling kettle, adding a sodium silicate solution, carrying out coating reaction, uniformly grinding until the screen residue rate of a 325-mesh screen is less than or equal to 2%, and discharging for later use;
s2, carrying out reheating reaction on the bismuth oxide powder obtained after the treatment of S1 at the temperature of 180-210 ℃, wherein the reaction time is 5-6.5h, and after the reaction is finished, carrying out water washing and drying;
s3, adding the dried bismuth oxide powder into a ball milling kettle, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, uniformly grinding, and discharging to obtain the modified surface treated bismuth oxide.
6. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 5, characterized in that: the mass of the bismuth oxide, the sodium silicate solution and the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is 90-98: 1-8: 1-5;
preferably: the mass of the bismuth oxide, the sodium silicate solution and the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is 93-97 percent: 2-6: 1 to 5.
7. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that: in the component A:
the fluororesin with medium hydroxyl content is LUMIFLON LF-600X fluororesin from AGC company;
the wetting dispersant is Pic DISPERBYK-163 or Pic DISPERBYK-2025;
the coloring weather-resistant pigment is one or more of rutile titanium dioxide, medium pigment carbon black, phthalocyanine blue, iron oxide red and iron oxide yellow;
the defoaming agent is bike BYK-066N or bike BYK-1790;
the leveling agent is ByK-323 or ByK-331;
the rheological additive is
R972 fumed silica;
the organic solvent is prepared from the following components in a mass ratio of 1-5: 1-5: 1-5 of propylene glycol methyl ether acetate, butyl acetate and xylene.
8. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that: in the component B: the isocyanate curing agent is Asahikaseie402-90T, AsahiKASEIE405-80T and degussa T1890E alicyclic polyisocyanate curing agents, and the mass of the three is 50-65: 20-40: 5-15.
9. The flexible fluororesin coating for preventing chlorine ion permeation for a concrete surface according to claim 1, characterized in that: in the component B: the dehydrating agent is FL-180 dehydrating agent, and the organic solvent is butyl acetate.
10. A method for preparing the chlorine ion permeation resistant flexible fluororesin coating for a concrete surface according to claim 1, characterized in that: the method comprises the following steps:
the preparation method of the component A comprises the following steps:
adding a wetting dispersant, a rheological aid, a coloring weather-resistant pigment, modified surface treatment bismuth oxide, an organic solvent accounting for 30-80% of the formula amount and a medium hydroxyl content fluororesin accounting for 20-40% of the formula amount into a grinding kettle, grinding until the fineness is less than or equal to 20 mu m, adding the residual medium hydroxyl content fluororesin, modified polyol, a leveling agent, a defoaming agent and the residual organic solvent accounting for the formula amount, mixing and stirring uniformly at the speed of 400-600 rpm to obtain the component A of the chloride ion permeation resistant flexible fluororesin coating for the concrete surface.
The preparation method of the component B comprises the following steps:
adding solvent and dehydrating agent into a paint mixing kettle, and introducing N2And (3) protecting, namely mixing at a stirring speed of 400-600 rpm for 1-10 min, standing for 1h, adding an isocyanate curing agent, and mixing at a stirring speed of 400-600 rpm for 5-15 min to obtain the component B of the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface.
And mixing the component A and the component B to obtain the chlorine ion permeation resistant flexible fluororesin coating for the concrete surface.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05271606A (en) * | 1992-03-27 | 1993-10-19 | Japan Synthetic Rubber Co Ltd | Coating composition and application method |
| CN104312252A (en) * | 2014-09-26 | 2015-01-28 | 锐展(铜陵)科技有限公司 | High-airtightness filler for automobile coating and preparation method thereof |
| CN108218401A (en) * | 2016-12-21 | 2018-06-29 | 大连理工大学 | Using waste as anti-chlorine salt concrete of aggregate and preparation method thereof |
-
2020
- 2020-11-27 CN CN202011363881.5A patent/CN112625582B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05271606A (en) * | 1992-03-27 | 1993-10-19 | Japan Synthetic Rubber Co Ltd | Coating composition and application method |
| CN104312252A (en) * | 2014-09-26 | 2015-01-28 | 锐展(铜陵)科技有限公司 | High-airtightness filler for automobile coating and preparation method thereof |
| CN108218401A (en) * | 2016-12-21 | 2018-06-29 | 大连理工大学 | Using waste as anti-chlorine salt concrete of aggregate and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 《中国化学工业年鉴》编辑部: "《中国化学工业年鉴 2003-2004》", 31 December 2004, 中国化工信息中心 * |
| 北京矿冶研究总院: "《冶金和材料学术会议论文集 第1辑》", 31 December 1994, 北京：冶金工业出版社 * |
| 李素君: "聚氨酯力学性能影响因素的研究", 《辽阳石油化工高等专科学校学报》 * |
| 杜存山等: "铁路混凝土桥梁耐久性涂装", 《现代涂料与涂装》 * |
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