CN114961145A - Wall surface self-repairing method based on self-repairing polymer cement waterproof coating - Google Patents
Wall surface self-repairing method based on self-repairing polymer cement waterproof coating Download PDFInfo
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- CN114961145A CN114961145A CN202210560516.6A CN202210560516A CN114961145A CN 114961145 A CN114961145 A CN 114961145A CN 202210560516 A CN202210560516 A CN 202210560516A CN 114961145 A CN114961145 A CN 114961145A
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- 238000000576 coating method Methods 0.000 title claims abstract description 64
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 239000011414 polymer cement Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 22
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 15
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000011247 coating layer Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 5
- 230000032683 aging Effects 0.000 claims abstract description 4
- 238000011049 filling Methods 0.000 claims abstract description 4
- 239000003973 paint Substances 0.000 claims abstract description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 27
- 239000000839 emulsion Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 22
- 239000006004 Quartz sand Substances 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 18
- 239000000080 wetting agent Substances 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 10
- 241000276489 Merlangius merlangus Species 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 9
- 159000000000 sodium salts Chemical class 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 claims description 4
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000843 powder Substances 0.000 description 19
- 239000011344 liquid material Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 5
- 150000001450 anions Chemical class 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000004078 waterproofing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical group O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- -1 hydrotalcite compound Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
-
- 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
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
- C09D109/08—Latex
-
- 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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a wall surface self-repairing method based on a self-repairing polymer cement waterproof coating, which comprises the following steps of firstly, forming the coating, mixing a liquid component and a solid component according to a mass ratio of 1: 1.5-1: 2.5, uniformly stirring and forming; coating, namely covering and coating the paint on the surface to be constructed, and drying to form a coating layer; and thirdly, aging and damaging, contacting the coating layer with the water and high-concentration OH & lt- & gt permeated after damage, releasing the complex loaded in the layered hydrotalcite under the action of the water and the high-concentration OH & lt- & gt to form an oxidation reaction, and forming the repairing filling of the damaged part after polymerization. The polymer cement waterproof coating disclosed by the invention uses organic and inorganic repairing agents, can maintain the self-repairing effect of a coating film to the maximum extent, and can self-repair a crack with the width of 0.7mm under a certain condition.
Description
Technical Field
The invention belongs to the technical field of building waterproofing, and particularly relates to a wall surface self-repairing method based on a self-repairing polymer cement waterproof coating.
Background
In recent years, polymer cement waterproof coatings are widely applied to various waterproof projects, such as toilets, basements, roofs, pools, tunnels and the like. The waterproof coating can meet the requirements of different construction parts on the strength and flexibility of a coating film by adjusting the proportion of cement and polymer emulsion, but the protective decorative layer covering the coating film is usually required to be damaged for maintenance after the coating film is damaged, so that great inconvenience is brought to construction.
The self-repairing waterproof coating can solve the pain points, can imitate human skin, can heal by self after the coating is damaged, and can automatically repair water leakage points, thereby ensuring the integrity of the waterproof coating and the safety of the whole waterproof system. The self-repairing polymer cement waterproof coating has the characteristics of good self-closing property, strong stability, high safety and the like, can better resist cracking deformation of a base layer, quickly grasp the psychology of a client, and is bound to become a hot point for market competition pursuing.
The hydrotalcite compound (LDHs) is a cheap and easily prepared anionic layered compound, and the molecular formula of the typical hydrotalcite is Mg 6 Al 2 (OH) 16 CO 3 •4H 2 And (O). Atoms on the hydrotalcite main body laminate are mainly linked by covalent bonds, and the main body laminate and interlayer anions are mainly linked by ionic bonds, hydrogen bonds and Van der Waals force, so that the bonding force between the laminate and the interlayer anions is relatively weaker and the laminate is easier to break. When the hydrotalcite is substituted with other anions, the interlayer guest anions are dissociated, the substitution does not change the structure of the hydrotalcite host laminate, only the interlayer spacing is changed, and the hydrotalcite with the characteristics can be usedThe compound with self-repairing function is loaded between the layered plates of the hydrotalcite. When the external environment changes, such as the change of humidity, pH and the like, the self-repairing functional compound loaded between the hydrotalcite laminates can be gradually released to generate a crosslinking reaction, thereby completing the self-repairing of the damaged part.
Disclosure of Invention
In order to solve the defect of self-repairing capability of the existing polymer cement waterproof coating after damage, the invention provides a wall surface self-repairing method based on a self-repairing polymer cement waterproof coating, and the method can self-repair a crack with the width of 0.7mm in a humid environment.
The technical scheme of the invention is as follows:
a wall self-repairing method based on a self-repairing polymer cement waterproof coating comprises the following steps of firstly, forming the coating, wherein the coating is formed by mixing a liquid component and a solid component according to a mass ratio of 1: 1.5-1: 2.5, and forming after uniformly stirring; coating, namely covering and coating the coating on the surface to be constructed, and drying to form a coating layer; step three, aging damage, coating the film layer, water permeating after damage and high-concentration OH - Contacting the layered hydrotalcite-supported complex with water and high concentration of OH — Under the action of the catalyst, the catalyst is released to form oxidation reaction, and repair filling of the damaged part is formed after polymerization is completed.
Based on the above, the liquid component comprises the following substances in percentage by mass: 80-95% of acrylate emulsion, 0.1-1% of sodium salt dispersant, 0.2-0.5% of wetting agent, 0.1-1% of propylene glycol, 0.1-0.5% of defoaming agent and the balance of water; the solid component comprises the following substances in percentage by mass: 10-30% of coarse whiting, 20-50% of quartz sand, 2-10% of calcium sulphoaluminate type expanding agent, 1-10% of modified hydrotalcite and the balance of cement.
Based on the above, the modified hydrotalcite is a layered hydrotalcite carrying a complex formed by pyrogallic acid and borate.
Based on the above, the acrylate and the emulsion are at least one of styrene-acrylic emulsion, pure acrylic emulsion, styrene-butadiene emulsion and silicone-acrylic emulsion.
Based on the above, the wetting agent is a polyoxyethylene ether surfactant.
Based on the above, the particle size of the quartz sand is at least one of 70 to 140 meshes or 100 to 200 meshes.
The self-repairing principle of the invention is as follows: in the process of drying and film forming of the polymer cement waterproof coating, the complex pyrogallic acid loaded on the hydrotalcite can be greatly and stably stored in a system due to the slow release effect. When the dried coating film is broken, leakage occurs at the crack portion, and water and OH having a high concentration are generated - Under the action of the catalyst, the complex pyrogallic acid is gradually released from the hydrotalcite. Because the phenolic hydroxyl group of the pyrogallic acid has higher activity, the pyrogallic acid can generate oxidation reaction with water, oxygen and the like in a system to generate a benzoquinone structure, a hydrogen bond, pi-pi accumulation and other non-covalent actions are generated at a damaged interface, the pyrogallic acid can also generate polymerization and is filled into a gap at a damaged part, the process is more complicated, and the schematic diagram of the principle is shown in figure 1; meanwhile, the calcium sulphoaluminate type expanding agent which is not completely reacted in the powder also participates in the reaction to generate ettringite crystals to block gaps, so that the cracks are repaired. The self-repairing function can be understood from the mechanism of organic and inorganic double self-repairing.
The invention has the beneficial effects that: the polymer cement waterproof coating disclosed by the invention uses organic and inorganic repairing agents, can maintain the self-repairing effect of a coating film to the maximum extent, and can self-repair a crack with the width of 0.7mm under a certain condition.
Drawings
FIG. 1 is a schematic diagram of the reaction principle of pyrogallic acid as a self-repairing agent.
Detailed Description
The invention is further described with reference to specific examples.
The invention discloses a wall self-repairing method based on self-repairing polymer cement waterproof paint,
step one, forming a coating, namely mixing a liquid component and a solid component according to a mass ratio of 1: 1.5-1: 2.5, uniformly stirring and forming; painting, namely painting the coating to be constructedCovering and brushing the surface, and drying to form a coating layer; step three, aging damage, coating the film layer, permeated water after damage and high-concentration OH — Contacting the layered hydrotalcite-supported complex with water and high concentration of OH — Under the action of the catalyst, the catalyst is released to form oxidation reaction, and repair filling of the damaged part is formed after polymerization is completed.
Wherein, the preferable liquid components in this embodiment include the following substances by mass percent: 80-95% of acrylate emulsion, 0.1-1% of sodium salt dispersant, 0.2-0.5% of wetting agent, 0.1-1% of propylene glycol, 0.1-0.5% of defoaming agent and the balance of water; the solid component comprises the following substances in percentage by mass: 10-30% of coarse whiting, 20-50% of quartz sand, 2-10% of calcium sulphoaluminate type expanding agent, 1-10% of modified hydrotalcite and the balance of cement.
Among these, the preferred modified hydrotalcite in this example is layered hydrotalcite carrying a complex formed by pyrogallic acid and borate.
In this embodiment, the preferable acrylate and the emulsion are at least one of styrene-acrylic emulsion, pure acrylic emulsion, styrene-butadiene emulsion, and silicone-acrylic emulsion.
Among them, the preferable wetting agent in this embodiment is a polyoxyethylene ether surfactant.
In the present embodiment, the particle size of the quartz sand is preferably at least one of 70 to 140 mesh or 100 to 200 mesh.
Example 1
Based on the repairing method, the embodiment discloses a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1: 1.5.
The liquid component comprises the following substances in percentage by mass: 90% of styrene-acrylic emulsion, 1% of sodium salt dispersant, 0.3% of wetting agent, 0.2% of propylene glycol, 0.3% of defoaming agent and 8.2% of water.
The solid component comprises the following substances in percentage by mass: 10% of coarse whiting, 15% of quartz sand of 70-140 meshes, 25% of quartz sand of 100-200 meshes, 5% of calcium sulfoaluminate type expanding agent, 5% of modified hydrotalcite and 40% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:1.5, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
Example 2
Based on the repairing method, the embodiment discloses a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1:2.
The liquid component comprises the following substances in percentage by mass: 95% of pure acrylic emulsion, 0.8% of sodium salt dispersant, 0.4% of wetting agent, 0.5% of propylene glycol, 0.3% of defoaming agent and 3% of water.
The solid component comprises the following substances in percentage by mass: 15% of coarse whiting, 18% of quartz sand of 70-140 meshes, 30% of quartz sand of 100-200 meshes, 2% of calcium sulphoaluminate type expanding agent, 1% of modified hydrotalcite and 34% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:2, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
Example 3
Based on the repairing method, the embodiment discloses a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1:2.
The liquid component comprises the following substances in percentage by mass: 85% of butylbenzene emulsion, 0.5% of sodium salt dispersant, 0.5% of wetting agent, 0.6% of propylene glycol, 0.5% of defoaming agent and 12.9% of water.
The solid component comprises the following substances in percentage by mass: 16% of coarse whiting, 10% of quartz sand of 70-140 meshes, 26% of quartz sand of 100-200 meshes, 8% of calcium sulphoaluminate type expanding agent, 10% of modified hydrotalcite and 30% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:2, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
Example 4
Based on the repairing method, the embodiment discloses a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1: 2.5.
The liquid component comprises the following substances in percentage by mass: 80% of silicone-acrylic emulsion, 0.2% of sodium salt dispersant, 0.5% of wetting agent, 1% of propylene glycol, 0.5% of defoaming agent and 17.8% of water.
The solid component comprises the following substances in percentage by mass: 25% of coarse whiting, 10% of quartz sand of 70-140 meshes, 17% of quartz sand of 100-200 meshes, 1% of calcium sulphoaluminate type expanding agent, 2% of modified hydrotalcite and 45% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:2.5, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
Comparative example 1
Based on the repairing method, the embodiment discloses a comparative example of a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1: 1.5.
The liquid component comprises the following substances in percentage by mass: 90% of styrene-acrylic emulsion, 1% of sodium salt dispersant, 0.3% of wetting agent, 0.2% of propylene glycol, 0.3% of defoaming agent and 8.2% of water.
The solid component comprises the following substances in percentage by mass: 15% of coarse whiting, 15% of quartz sand of 70-140 meshes, 25% of quartz sand of 100-200 meshes, 5% of calcium sulphoaluminate type expanding agent and 40% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:1.5, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
Comparative example 2
Based on the repairing method, the embodiment discloses a comparative example of a self-repairing polymer cement waterproof coating for wall self-repairing, which is composed of a liquid component and a solid component in a mass ratio of 1:2.
The liquid component comprises the following substances in percentage by mass: 95% of pure acrylic emulsion, 0.8% of sodium salt dispersant, 0.4% of wetting agent, 0.5% of propylene glycol, 0.3% of defoaming agent and 3% of water.
The solid component comprises the following substances in percentage by mass: 18% of coarse whiting, 18% of quartz sand of 70-140 meshes, 30% of quartz sand of 100-200 meshes, 2% of calcium sulphoaluminate type expanding agent, 1% of modified hydrotalcite and 34% of P.O 42.5.5 cement.
Respectively and uniformly mixing the liquid material and the powder material, slowly adding the powder material into the liquid material according to the mass ratio of 1:2, continuously stirring for 5 min, preparing the polymer cement waterproof coating after uniformly mixing the liquid material and the powder material, then blade-coating to form a film, and testing the performance of the film.
The examples 1 to 4 and the comparative examples 1 to 2 were cured according to the Standard of GB/T23445-2009 Polymer Cement waterproofing paint, and then a 10mm long crack having a width of 0.7mm was cut on the waterproofing coating film by a blade, and a water column having a height of 300mm was maintained on one side of the coating film to cause leakage at the crack, and water droplets were dropped dropwise. The test results are shown in the following table.
TABLE 1 self-repair of Polymer Cement waterproofing coatings
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 |
| Original tensile strength/MPa | 1.6 | 2.1 | 1.9 | 2.4 | 1.6 | 1.9 |
| Tensile strength/MPa after self-repairing for 48h | 0.9 | 0.8 | 1.3 | 1.2 | - | - |
| Self-repair efficiency | 56% | 38% | 68% | 50% | - | - |
| Time of self-closing | 14h | 24h | 10h | 18h | 168h | - |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.
Claims (6)
1. A wall self-repairing method based on a self-repairing polymer cement waterproof coating is characterized in that:
step one, forming a coating, namely mixing a liquid component and a solid component according to a mass ratio of 1: 1.5-1: 2.5, uniformly stirring and forming;
coating, namely covering and coating the paint on the surface to be constructed, and drying to form a coating layer;
and thirdly, aging and damaging, contacting the coating layer with the water and high-concentration OH & lt- & gt permeated after damage, releasing the complex loaded in the layered hydrotalcite under the action of the water and the high-concentration OH & lt- & gt to form an oxidation reaction, and forming the repairing filling of the damaged part after polymerization.
2. The wall surface self-repairing method based on the self-repairing polymer cement waterproof coating, according to claim 1, is characterized in that: the liquid component comprises the following substances in percentage by mass: 80-95% of acrylate emulsion, 0.1-1% of sodium salt dispersant, 0.2-0.5% of wetting agent, 0.1-1% of propylene glycol, 0.1-0.5% of defoaming agent and the balance of water; the solid component comprises the following substances in percentage by mass: 10-30% of coarse whiting, 20-50% of quartz sand, 2-10% of calcium sulphoaluminate type expanding agent, 1-10% of modified hydrotalcite and the balance of cement.
3. The wall surface self-repairing method based on the self-repairing polymer cement waterproof coating material as claimed in claim 2, characterized in that: the modified hydrotalcite is layered hydrotalcite loaded with complex, wherein the complex is formed by pyrogallic acid and borate.
4. The wall surface self-repairing method based on the self-repairing polymer cement waterproof coating material as claimed in claim 2, characterized in that: the acrylate and the emulsion are at least one of styrene-acrylic emulsion, pure acrylic emulsion, butylbenzene emulsion and silicone-acrylic emulsion.
5. The wall surface self-repairing method based on the self-repairing polymer cement waterproof coating material as claimed in claim 2, characterized in that: the wetting agent is polyoxyethylene ether surfactant.
6. The wall surface self-repairing method based on the self-repairing polymer cement waterproof coating material as claimed in claim 2, characterized in that: the quartz sand has a particle size of at least one of 70 to 140 mesh or 100 to 200 mesh.
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