CN116904048A - Anti-pulverization exterior wall silicate anticorrosive paint and preparation method and application thereof - Google Patents
Anti-pulverization exterior wall silicate anticorrosive paint and preparation method and application thereof Download PDFInfo
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- CN116904048A CN116904048A CN202310822459.9A CN202310822459A CN116904048A CN 116904048 A CN116904048 A CN 116904048A CN 202310822459 A CN202310822459 A CN 202310822459A CN 116904048 A CN116904048 A CN 116904048A
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000003973 paint Substances 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010298 pulverizing process Methods 0.000 title abstract description 16
- 239000004111 Potassium silicate Substances 0.000 claims abstract description 73
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims abstract description 73
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 73
- 229910052913 potassium silicate Inorganic materials 0.000 claims abstract description 73
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 36
- 239000010452 phosphate Substances 0.000 claims abstract description 36
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 34
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 34
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 34
- 125000000129 anionic group Chemical group 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 24
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 21
- 229920000642 polymer Polymers 0.000 claims abstract description 20
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims description 49
- 239000011248 coating agent Substances 0.000 claims description 47
- 229920005862 polyol Polymers 0.000 claims description 17
- 150000003077 polyols Chemical class 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010456 wollastonite Substances 0.000 claims description 5
- 229910052882 wollastonite Inorganic materials 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- 235000010215 titanium dioxide Nutrition 0.000 claims description 4
- 239000000080 wetting agent Substances 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract description 2
- 150000005846 sugar alcohols Polymers 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 17
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 230000005856 abnormality Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000005338 heat storage Methods 0.000 description 10
- 230000032683 aging Effects 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 238000003860 storage Methods 0.000 description 9
- 230000000536 complexating effect Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 150000001450 anions Chemical class 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 102220504382 3'-5' exoribonuclease 1_K99A_mutation Human genes 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003906 humectant Substances 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 229910001414 potassium ion Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000009257 reactivity Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 2
- -1 and meanwhile Substances 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 241000244269 Peucedanum Species 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000003804 effect on potassium Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001522 polyglycol ester Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D7/65—Additives macromolecular
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of paint, and discloses an anti-pulverization silicate anticorrosive paint for an external wall, a preparation method and application thereof. The silicate anticorrosive paint for the outer wall comprises potassium silicate, anionic polyoxyethylene ether phosphate, a polyalcohol polymer, styrene-acrylic emulsion, a filler and an auxiliary agent; the modulus of potassium silicate is less than 10. The silicate anticorrosive paint for the outer wall has good chalk resistance and is suitable for cement substrates.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an anti-pulverization exterior wall silicate anti-corrosion coating, and a preparation method and application thereof.
Background
At present, the external wall anti-corrosion paint aiming at the concrete base surface in the market is basically an organic paint system, adopts a film forming substance which is thermoplastic synthetic resin emulsion, has general chemical resistance, general compatibility with cement, poor strength and high requirement on alkali resistance and sealing property of the primer. The silicate inorganic paint is difficult to apply to the outer wall basically due to the poor film forming property of film forming substance potassium silicate, poor powder resistance and high drying speed of two-pass construction, but the silicate inorganic paint has good chemical resistance and is an excellent choice of anti-corrosion paint.
In order to improve the film forming property and the chalk resistance of the potassium silicate paint, the traditional method is improved by adding a high content of synthetic resin emulsion, but the chemical resistance of the paint is obviously reduced, and the chalk resistance is not improved well.
Therefore, there is a need to provide a silicate coating material having good powdering resistance, and further, a silicate coating material having good film forming properties.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides an anti-pulverization silicate anticorrosive paint for an external wall, and a preparation method and application thereof. The silicate anticorrosive paint for the outer wall has good chalk resistance, further has good film forming property, improves the construction drying speed and improves the construction adaptability of the inorganic paint
The invention is characterized in that: in order to solve the problem that the application of the existing silicate inorganic coating to the outer wall is easy to pulverize, the anionic polyoxyethylene ether phosphate dispersant is introduced into the silicate anticorrosive coating for the outer wall, and is different from the commercially available acrylic acid copolymer salt and homo-polymer salt dispersants, negative 3-valent phosphate radical is generated when the dispersant is ionized, the dispersant has a strong adsorption effect on metal ions, potassium ions in the silicate coating can be adsorbed to the periphery of the silicate coating, and the potassium ions pull the silicate radical nearby through the ionization balance effect of the potassium silicate, so that the concentration of the silicate radical is improved, the intermolecular distance is reduced, and the difficulty of silicate complexation reaction is reduced. The specific gravity of potassium silicate is large, the potassium silicate is easy to sink in the lower layer during storage and film formation of the coating, and meanwhile, the molecular chain is short, so that the permeability is strong, when the silicate coating is formed into a film, a large amount of potassium silicate permeates to the bottom layer, so that the concentration of the potassium silicate on the surface is low, the complexing reaction is difficult, the density is insufficient, and the powder coating property is poor. The anionic polyoxyethylene ether phosphate belongs to an anionic surfactant, and can migrate to the surface along with the volatilization of moisture in the film forming process of the coating, and meanwhile, potassium silicate is pulled to the surface, so that the penetration of the potassium silicate is reduced, the complexing reaction density and the coating property are improved, and the film forming effect, the chalk resistance and the alkali resistance of the coating are improved.
The multi-branched polymer polyol is added into the silicate anticorrosive paint for the outer wall, and compared with glycol and propylene glycol humectant, the multi-branched polymer polyol has more structural branched chains and longer molecular chains, so that the porous surface of the multi-branched polymer polyol permeates more slowly than the glycol and propylene glycol humectant; meanwhile, the molecular weight is high, the boiling point is higher, the volatilization speed is slower, the problem that the inorganic coating is too fast to dry is effectively solved, and longer time is provided for potassium silicate to migrate to the surface, so that the complexing film forming efficiency of the potassium silicate is promoted.
The first aspect of the invention provides an anti-chalking silicate anticorrosive paint for an external wall.
Specifically, the anti-pulverization exterior wall silicate anticorrosive paint comprises potassium silicate, anionic polyoxyethylene ether phosphate, a polyol polymer, styrene-acrylic emulsion, a filler and an auxiliary agent;
the modulus of the potassium silicate is less than 10.
Preferably, the modulus of the potassium silicate is 2-8; further preferably, the potassium silicate has a modulus of 3.3 to 5; more preferably, the potassium silicate has a modulus of 3.3 to 3.9.
Preferably, the filler comprises at least one of titanium white, calcined kaolin and wollastonite.
Preferably, the mesh number of the calcined kaolin and wollastonite is 1100-2150 mesh, preferably 1200-2000 mesh.
Preferably, the auxiliary agent comprises at least one of an antifoaming agent, a wetting agent, a mildew preventive, cellulose, silica sol, and a dispersing agent other than anionic polyoxyethylene ether phosphate.
Preferably, the polyol polymer comprises polyethylene glycol.
Preferably, the solvent is water, more preferably deionized water.
Preferably, the silicate anticorrosive paint for the outer wall comprises, by weight, 2.5-30 parts of potassium silicate, 0.5-2 parts of anionic polyoxyethylene ether phosphate, 1.0-5.0 parts of a polyol polymer, 5-15 parts of a styrene-acrylic emulsion, 20-48 parts of a filler, 0.5-5 parts of an auxiliary agent and 30-60 parts of a solvent.
Further preferably, the exterior wall silicate anticorrosive paint comprises, by weight, 4.5-15 parts of potassium silicate, 0.6-1.5 parts of anionic polyoxyethylene ether phosphate, 1.0-4 parts of a polyol polymer, 7-15 parts of a styrene-acrylic emulsion, 30-45 parts of a filler, 0.5-3 parts of an auxiliary agent and 30-60 parts of a solvent.
More preferably, the exterior wall silicate anticorrosive paint comprises, by weight, 7.5-9 parts of potassium silicate, 0.8-1.2 parts of anionic polyoxyethylene ether phosphate, 1.5-3.0 parts of a polyol polymer, 7-8 parts of styrene-acrylic emulsion, 42-44 parts of a filler, 0.83-0.95 part of an auxiliary agent and 33.1-50.4 parts of a solvent.
The second aspect of the invention provides a preparation method of the anti-pulverization silicate anticorrosive paint for the outer wall.
Specifically, the preparation method of the anti-pulverization silicate anticorrosive paint for the outer wall comprises the following steps:
and mixing the components to prepare the silicate anticorrosive paint for the outer wall.
Preferably, the preparation method comprises the following steps: mixing the styrene-acrylic emulsion and part of the solvent, adding the auxiliary agent and the polyol polymer, stirring and mixing, and finally adding the rest components, stirring and mixing to prepare the external wall silicate anticorrosive paint.
Preferably, the stirring and mixing speed is 800-1800 rpm, preferably 1000-1200 rpm.
Preferably, the potassium silicate is formulated into a potassium silicate solution prior to addition or is added directly by purchasing a commercially available potassium silicate solution, wherein the mass fraction of the potassium silicate solution is 25-35%, preferably 28-30%.
The third aspect of the invention provides the application of the anti-pulverization silicate anticorrosive paint for the outer wall.
The silicate anticorrosive paint for the outer wall is applied to the field of construction.
Preferably, the application comprises application on a cementitious substrate.
Compared with the prior art, the invention has the following beneficial effects:
(1) The anionic polyoxyethylene ether phosphate dispersant is introduced into the silicate anticorrosive paint for the outer wall, is different from commercially available acrylic acid copolymer salt and homo-polymer salt dispersants, generates negative 3-valent phosphate radical when the dispersant is ionized, has strong adsorption effect on metal ions, can adsorb potassium ions in the silicate paint around the silicate paint, and the potassium ions pull silicate radicals nearby through ionization balance effect of potassium silicate, so that the concentration of silicate radicals is improved, the intermolecular distance is reduced, and the difficulty of silicate complexation reaction is reduced. The specific gravity of potassium silicate is large, the potassium silicate is easy to sink in the lower layer during storage and film formation of the coating, and meanwhile, the molecular chain is short, so that the permeability is strong, when the silicate coating is formed into a film, a large amount of potassium silicate permeates to the bottom layer, so that the concentration of the potassium silicate on the surface is low, the complexing reaction is difficult, the density is insufficient, and the powder coating property is poor. The anionic polyoxyethylene ether phosphate belongs to an anionic surfactant, and can migrate to the surface along with the volatilization of moisture in the film forming process of the coating, and meanwhile, potassium silicate is pulled to the surface, so that the penetration of the potassium silicate is reduced, the complexing reaction density and the coating property are improved, and the film forming effect, the chalk resistance and the alkali resistance of the coating are improved.
The multi-branched polymer polyol is added into the silicate anticorrosive paint for the outer wall, and compared with glycol and propylene glycol humectant, the multi-branched polymer polyol has more structural branched chains and longer molecular chains, so that the porous surface of the multi-branched polymer polyol permeates more slowly than the glycol and propylene glycol humectant; meanwhile, the molecular weight is high, the boiling point is higher, the volatilization speed is slower, the problem that the inorganic coating is too fast to dry is effectively solved, and longer time is provided for potassium silicate to migrate to the surface, so that the complexing film forming efficiency of the potassium silicate is promoted.
(2) The comprehensive performance of the coating formed by the coating can be further improved by reasonably matching the content of each component in the silicate anticorrosive coating for the outer wall.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples will be presented. It should be noted that the following examples do not limit the scope of the invention.
The starting materials, reagents or apparatus used in the following examples are all available from conventional commercial sources or may be obtained by methods known in the art unless otherwise specified.
The exterior wall silicate anticorrosive paint formulations of examples 1 to 3 and comparative examples 1 to 3 are shown in Table 1 (the usage units of the components in Table 1 are parts by weight, the code before the raw components in Table 1 is the product model, for example, the RS837A styrene-acrylic emulsion refers to the styrene-acrylic emulsion model RS 837A).
TABLE 1
The preparation method of the silicate anticorrosive paint for the outer wall of the embodiment 1 comprises the following steps:
mixing and dispersing the RS837A styrene-acrylic emulsion, half deionized water and 250HBR cellulose for 12 minutes, then adding PE6200 wetting agent, P30 dispersing agent, CF246 defoamer, R996 titanium white, 2000 mesh calcined kaolin, 1250 mesh wollastonite, mildew inhibitor, polyethylene glycol G500 (Kelain) and Hostapht 1306 anion polyoxyethylene ether phosphate, stirring and mixing at the rotation speed of 1200 revolutions per minute for 25 minutes, finally adding the rest components, and continuing stirring and mixing to obtain the external wall silicate anti-corrosive paint.
Other examples and comparative examples were prepared by reference to the method of example 1.
The effect test was carried out on the silicate anticorrosive paint for external wall of the above examples 1-3 and comparative examples 1-3, and the results are shown in Table 2.
TABLE 2
As can be seen from tables 1 and 2, in comparative example 1, when 8 parts of styrene-acrylic emulsion and 20 parts of potassium silicate solution were used for formulation, pulverization was serious after aging resistance, but there was almost no discoloration and no abnormality in adhesion, indicating that the film-forming effect of potassium silicate was poor and the permeation was good.
Example 1, on the basis of comparative example 1, 0.8 part of Hostapht 1306 anionic polyoxyethylene ether phosphate is added, the pulverization is obviously improved after aging resistance, but the adhesion on a polyester film is poor, the film can be peeled off, which proves that Hostapht 1306 can effectively improve the film forming effect of potassium silicate, and meanwhile, the migration of potassium silicate to the surface of a coating film is increased, so that the adhesion is reduced to some extent.
When 14 parts of styrene-acrylic emulsion, 10 parts of potassium silicate solution and 10 parts of silica sol are adopted in comparative example 2, the pulverization is still serious after aging resistance, the improvement is not obvious compared with comparative example 1, and meanwhile, the defect of poor color change also occurs, which indicates that the substances wrapped by the formulation of comparative example 2 are not obviously changed, the improvement of the wrapping property of 14 parts of styrene-acrylic emulsion and 10 parts of silica sol compared with the potassium silicate solution is insufficient for wrapping powder, and the method for increasing the emulsion is difficult to achieve the aim of maintaining the characteristics of inorganic paint and has good pulverization resistance.
When 1.5 parts of ethylene glycol is used in comparative example 3, the coating performance is inferior to that of example 1, the surface drying time is obviously shorter, the migration of potassium silicate is unfavorable, the film forming effect of the coating is poor, and the chalking resistance effect is affected. Experiments show that the polyethylene glycol G500 can effectively improve the opening time of a coating film and improve the film forming effect of the coating film.
When 2 parts of polyethylene glycol G500 is adopted in the example 2, the coating performance is obviously better than that of the example 1, the surface drying time is obviously prolonged, the film forming effect is better, the anti-pulverization effect is excellent, and the storage stability is equivalent to that of the example 1.
In example 3, when 3 parts of polyethylene glycol G500 is adopted, the surface drying time is obviously longer than that of example 2, but the chalk resistance is not obviously improved, meanwhile, the storage stability is obviously reduced, the viscosity change after storage is increased from 10KU to 13KU of example 2, which indicates that the system compatibility is reduced when the dosage of polyethylene glycol G500 is increased, and the migration effect of potassium silicate is also influenced; the second experiment shows that polyethylene glycol G500 can effectively improve the opening time of the formula, but only plays an auxiliary role in potassium silicate film formation.
The exterior wall silicate anticorrosive paint formulations of examples 4 to 7 and comparative example 4 are shown in Table 3 (the usage units of the components in Table 3 are parts by weight, the code before the raw material components in Table 3 is the product model, for example, the RS837A styrene-acrylic emulsion refers to the styrene-acrylic emulsion model RS 837A).
TABLE 3 Table 3
The preparation method of the silicate anticorrosive paint for the outer wall of the embodiment 4 comprises the following steps:
mixing and dispersing the RS837A styrene-acrylic emulsion, half deionized water and 250HBR cellulose for 12 minutes, then adding PE6200 wetting agent, P30 dispersing agent, CF246 defoamer, R996 titanium white, 2000 mesh calcined kaolin, 1250 mesh wollastonite, mildew inhibitor, polyethylene glycol G500 (Kelain) and Hostapht 1306 anion polyoxyethylene ether phosphate, stirring and mixing at the rotation speed of 1200 revolutions per minute for 25 minutes, finally adding the rest components, and continuing stirring and mixing to obtain the external wall silicate anti-corrosive paint.
The preparation methods of the silicate anticorrosive paint for external walls of the above examples 5 to 7 and comparative example 4 were prepared by referring to the method of example 4.
The effect test was carried out on the exterior wall silicate anticorrosive paint of the above examples 4 to 7 and comparative example 4, and the results of the heat storage (GB/T6753.3), the artificial aging resistance (GB/T1865), the alkali resistance (JT/T695), the water resistance (GB/T1733) and the adhesion (JT/T695) of the coating film were tested are shown in Table 4.
TABLE 4 Table 4
As can be seen from tables 3 and 4, when the solid potassium silicate (modulus is 10.0) of Xiamen rattan M10 is adopted in comparative example 4, the viscosity of the corresponding silicate anticorrosive paint for the outer wall is increased by 2.8KU compared with the initial viscosity after 30 days of heat storage, and the stability is high; the powder is 2-3 grade, the performance is worst, which indicates that the complexing reaction ends of the molecules are grafted, the reaction activity is low, and the film forming effect is not obviously improved by adding Hostapht 1306 anion polyoxyethylene ether phosphate.
In the embodiment 4, when Shanghai Australian K99 potassium silicate (modulus 3.3) is adopted, the viscosity of the mixture is increased by 22KU compared with the initial viscosity after heat storage for 30 days, which indicates that the complex reaction ends of the molecules are more, the reactivity is high, and the Hostapht 1306 anion polyoxyethylene ether phosphate is added to have obvious adsorption effect on the mixture, so that the local concentration is higher, and the mixture reacts in the coating, so that the viscosity stability is obviously reduced, and the construction requirement can be met; meanwhile, the powder resistance and the adhesive force are good, which shows that Hostapht 1306 anionic polyoxyethylene ether phosphate has obvious improvement on the film forming effect.
In example 5, when Shanghai Australian K99A potassium silicate (modulus 3.5) is adopted, the viscosity is increased by 15.5KU after heat storage for 30 days, the stability is obviously improved compared with K99 of modulus 3.3, meanwhile, the powder resistance and the adhesive force are better, which shows that Hostapht 1306 anion polyoxyethylene ether phosphate has obvious improvement on the film forming effect, but the reactivity of K99A potassium silicate is lower than that of K99 potassium silicate, so the reaction in the paint is less, and the stability is improved to some extent.
In example 6, when Shanghai Australian K100 potassium silicate (modulus 3.9) is adopted, the viscosity is increased by 13.6KU after heat storage for 30 days, the stability is improved compared with K99A potassium silicate with the modulus 3.5, and meanwhile, the powder resistance and the adhesive force are better, which shows that Hostapht 1306 anion polyoxyethylene ether phosphate has obvious improvement on the film forming effect, but the reactivity of K100 potassium silicate is lower than that of K99A potassium silicate, so that the reaction in the paint is less, and the stability is improved.
In example 7, when the Xiamen Peucedanum MOS-1010 potassium silicate (modulus 3.9) is adopted, the viscosity is increased by 13.4KU compared with the initial viscosity after 30 days of heat storage, the stability is equivalent to that of K100 potassium silicate with the modulus 3.9, and meanwhile, the test differences of the chalk resistance and the adhesive force of the K100 potassium silicate are not obvious, so that the effect of Hostapht 1306 anionic polyoxyethylene ether phosphate on the potassium silicate with the modulus 3.9 is equivalent.
The examples 4-7 and the comparative example 4 show that the potassium silicate with the modulus smaller than 10 (especially the potassium silicate with the modulus of 3.3-3.9) by adopting Hostapht 1306 anion polyoxyethylene ether phosphate has obvious improvement effect in film forming, and effectively improves the anti-chalking effect of the coating. However, when the modulus of potassium silicate is 10, the Hostapht 1306 anionic polyoxyethylene ether phosphate has no obvious improvement effect on film formation because the ports of the complexing reaction are basically grafted completely. However, when the potassium silicate modulus is 3.3, the number of reactive ports is large, the reactivity is strong, the stability is reduced when Hostapht 1306 anionic polyoxyethylene ether phosphate is added, and the use of Hostapht 1306 anionic polyoxyethylene ether phosphate is not suitable when the potassium silicate modulus is higher (more than or equal to 10.0), the performance of the paint is not obviously improved, and the production cost of the paint is increased. When Hostapht 1306 is used to prepare a coating with a modulus below 3.3, the stability of the coating decreases, but the chalking resistance is still good.
The exterior wall silicate anticorrosive paint formulations of examples 8 to 12 are shown in Table 5 (the amount of each component in Table 5 is in parts by weight, the code before the raw material component in Table 5 is the product model, for example, the RS837A styrene-acrylic emulsion means the styrene-acrylic emulsion model RS 837A).
TABLE 5
The preparation methods of the exterior wall silicate anticorrosive paint of the above examples 8 to 12 were prepared by referring to the method of example 4.
The effect test was carried out on the exterior wall silicate anticorrosive paint of examples 8 to 12, and the heat storage (GB/T6753.3), the artificial aging resistance (GB/T1865), the alkali resistance (JT/T695), the water resistance (GB/T1733) and the adhesion (JT/T695) of the coating film were tested, and the results are shown in Table 6.
TABLE 6
| Project | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 |
| Initial viscosity (25 ℃ C.), KU | 96.2 | 93.0 | 93.0 | 92.7 | 89.7 |
| pH value of | >12 | >12 | >12 | >12 | >12 |
| Contrast ratio | 95.2 | 95..3 | 95.7 | 95.7 | 95.4 |
| Viscosity after 30 days of thermal storage (25 ℃ C.), KU | 106.5 | 107.0 | 104.5 | 106.1 | 108.9 |
| Chalking and color-changing grades after 400h of artificial aging resistance | 0 | 0 | 0 | 0 | 0 |
| 600h post-artificial aging resistant pulverization grade | 0-1 | 0 | 0 | 0 | 0 |
| Alkali resistance/720 h | No abnormality | No abnormality | No abnormality | No abnormality | No abnormality |
| Water resistance/240 h | No abnormality | No abnormality | No abnormality | No abnormality | No abnormality |
| adhesion/MPa | 1.76 | 1.70 | 1.97 | 1.93 | 1.90 |
As can be seen from tables 5 and 6, in example 8, when the coating is prepared from 25 parts of potassium silicate solution and 0.8 part of Hostapht 1306 anionic polyoxyethylene ether phosphate, the viscosity is increased by 10.3KU after heat storage, the stability meets the requirement, and the artificial aging resistance of 400 hours also meets the JT/T695-2007II-M type requirement.
Example 9 when a coating is prepared by using 25 parts of potassium silicate solution and Hostapht 1306 anionic polyoxyethylene ether phosphate, the viscosity is increased by 14KU after heat storage, the stability is slightly poorer than that of example 8, the powder level of 600h of artificial aging resistance is increased to 0 level, and the performance meets the JT/T695-2007II-M type requirement.
When 30 parts of potassium silicate solution are respectively matched with 0.8 part and 1.0 part of Hostapht 1306 anionic polyoxyethylene ether phosphate for preparing the coating in the example 10 and the example 11, the performance can meet the JT/T695-2007II-M type requirement, and the thermal storage stability is better than that of the formula with the dosage of 1.2 parts of Hostapht 1306 anionic polyoxyethylene ether phosphate.
Example 12 when a coating was prepared using 30 parts potassium silicate solution and 1.2 parts Hostapht 1306 anionic polyoxyethylene ether phosphate, the viscosity increased 19.2KU after thermal storage and the stability was reduced, but the coating performance passed JT/T695-2007 type II-M requirements.
From the above, by adding a proper amount of Hostapht 1306 anionic polyoxyethylene ether phosphate and matching with potassium silicate with a proper modulus, the film forming effect of the silicate paint can be effectively improved, meanwhile, the relatively stable storage state of the paint is maintained, and the performance meets and exceeds the requirements of JT/T695-2007II-M type concrete anti-corrosive paint.
The coating corresponding to the coating provided by the embodiment of the invention can solve the problem of pulverization resistance, and meets the requirements of JT/T695-2007II-M type concrete anticorrosive coatings.
Comparative example 5
Comparative example 5 differs from example 8 only in that comparative example 5 replaces the Hostapht 1306 anionic polyoxyethylene ether phosphate in example 8 with an equivalent amount of a fatty acid polyglycol ester dispersant, the remaining components and procedure being the same as example 8.
The paint-related properties were tested under the same conditions as in example 8, and the results are shown in table 7.
TABLE 7
From Table 7, the fatty acid polyethylene glycol ester dispersant has no aggregation effect on potassium silicate and has good heat storage stability; meanwhile, the film forming effect of potassium silicate is not improved, and the film is seriously atomized. The overall performance of the product can not meet the requirements of JT/T695-2007II-M type concrete anticorrosive paint.
Claims (10)
1. The silicate anticorrosive paint for the outer wall is characterized by comprising potassium silicate, anionic polyoxyethylene ether phosphate, a polyol polymer, styrene-acrylic emulsion, a filler and an auxiliary agent;
the modulus of the potassium silicate is less than 10.
2. The exterior wall silicate anticorrosive coating according to claim 1, wherein the potassium silicate has a modulus of 2 to 8.
3. The exterior wall silicate corrosion resistant coating according to claim 1, wherein the polyol polymer comprises polyethylene glycol.
4. The exterior wall silicate anticorrosive coating according to claim 1, wherein the auxiliary agent comprises at least one of an antifoaming agent, a wetting agent, a mildew inhibitor, cellulose, silica sol, and a dispersant other than anionic polyoxyethylene ether phosphate.
5. The exterior wall silicate anticorrosive coating according to claim 1, wherein the filler comprises at least one of titanium white, calcined kaolin, wollastonite.
6. The exterior wall silicate anticorrosive paint according to any one of claims 1 to 5, comprising, by weight, 2.5 to 30 parts of potassium silicate, 0.5 to 2 parts of anionic polyoxyethylene ether phosphate, 1.0 to 5.0 parts of a polyol polymer, 5 to 15 parts of a styrene-acrylic emulsion, 20 to 48 parts of a filler, 0.5 to 5 parts of an auxiliary agent, and 30 to 60 parts of a solvent.
7. The exterior wall silicate anticorrosive paint according to claim 6, which is characterized by comprising, by weight, 4.5-15 parts of potassium silicate, 0.6-1.5 parts of anionic polyoxyethylene ether phosphate, 1.0-4 parts of polyol polymer, 7-15 parts of styrene-acrylic emulsion, 30-45 parts of filler, 0.5-3 parts of auxiliary agent and 30-60 parts of solvent.
8. The method for preparing the silicate anticorrosive paint for the outer wall according to any one of claims 1 to 7, comprising the following steps:
and mixing the components to prepare the silicate anticorrosive paint for the outer wall.
9. The preparation method according to claim 8, comprising the steps of: mixing the styrene-acrylic emulsion and part of the solvent, adding the auxiliary agent and the polyol polymer, stirring and mixing, and finally adding the rest components, stirring and mixing to prepare the external wall silicate anticorrosive paint.
10. Use of the exterior wall silicate anticorrosive paint according to any one of claims 1 to 7 in the field of construction.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330822A (en) * | 2019-07-29 | 2019-10-15 | 四川瑞珂新材料科技有限公司 | A kind of inorganic coating and its preparation method and application |
| CN111423798A (en) * | 2019-01-10 | 2020-07-17 | 沈阳化工研究院有限公司 | Water-based polyurea coating material and preparation method thereof |
| CN111548695A (en) * | 2020-05-30 | 2020-08-18 | 湖北美利佳涂料有限公司 | Exterior wall latex paint |
| CN112961514A (en) * | 2021-02-09 | 2021-06-15 | 广东嘉宝莉科技材料有限公司 | Inorganic silicate as-cast finish concrete coating and preparation method and application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111423798A (en) * | 2019-01-10 | 2020-07-17 | 沈阳化工研究院有限公司 | Water-based polyurea coating material and preparation method thereof |
| CN110330822A (en) * | 2019-07-29 | 2019-10-15 | 四川瑞珂新材料科技有限公司 | A kind of inorganic coating and its preparation method and application |
| CN111548695A (en) * | 2020-05-30 | 2020-08-18 | 湖北美利佳涂料有限公司 | Exterior wall latex paint |
| CN112961514A (en) * | 2021-02-09 | 2021-06-15 | 广东嘉宝莉科技材料有限公司 | Inorganic silicate as-cast finish concrete coating and preparation method and application thereof |
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