CN113861734A - Exterior wall fireproof coating and preparation method thereof - Google Patents
Exterior wall fireproof coating and preparation method thereof Download PDFInfo
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- CN113861734A CN113861734A CN202111167082.5A CN202111167082A CN113861734A CN 113861734 A CN113861734 A CN 113861734A CN 202111167082 A CN202111167082 A CN 202111167082A CN 113861734 A CN113861734 A CN 113861734A
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- 238000000576 coating method Methods 0.000 title claims abstract description 60
- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 76
- 239000000835 fiber Substances 0.000 claims abstract description 50
- 239000004593 Epoxy Substances 0.000 claims abstract description 41
- 239000004568 cement Substances 0.000 claims abstract description 40
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 38
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 239000003063 flame retardant Substances 0.000 claims description 9
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 6
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 4
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 238000011056 performance test Methods 0.000 description 11
- 239000003973 paint Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 6
- 239000002585 base Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
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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
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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
- C09D7/60—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
- C09D7/65—Additives macromolecular
-
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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 field of coatings, and discloses an exterior wall fireproof coating which comprises the following components in parts by weight: 5-10 parts of styrene-acrylic emulsion; 5-10 parts of water-based epoxy emulsion; 30-50 parts of high-alumina cement; 3-5 parts of aluminum silicate refractory fiber; 0.2-1 part of silane coupling agent; 3-5 parts of silica sol. The coating can ensure that the coating has basic wall adhesion, the characteristic of the water-based epoxy emulsion is to increase the adhesion, meanwhile, the water-based epoxy emulsion and the styrene-acrylic emulsion have the characteristic of enhancing the coating, the water-based epoxy emulsion and the styrene-acrylic emulsion have a synergistic effect, and by matching with aluminum silicate refractory fibers, the high-alumina cement has very strong strength, so that the whole coating can keep integrity, and under the condition of high-temperature roasting or multi-year use, even if the adhesion to the wall and the structural strength of organic matters are reduced, a main framework formed by the high-alumina cement still can keep a very stable state, and can pass a strict fire prevention test.
Description
Technical Field
The invention relates to the field of coatings, in particular to an exterior wall fireproof coating and a preparation method thereof.
Background
The high-alumina cement has obvious advantages in being used in coatings, the most important advantage is that when the high-alumina cement is used in outdoor coatings such as exterior wall coatings, the high-alumina cement has better weather resistance when the proportion of the high-alumina cement to emulsion and organic matters is about 1:1, and compared with the traditional organic coatings, the high-temperature resistance is particularly excellent.
For example, CN201710047292.8 discloses a fireproof coating for a fireproof embankment, which is prepared by respectively preparing a component A and a component B during construction by using a component A formed by mixing portland cement, high-alumina cement, expanded perlite, expanded vermiculite and reinforcing fibers and a component B formed by mixing polyethylene-vinyl acetate copolymer emulsion and water as raw materials, and then fully and uniformly mixing the component A and the component B for spraying.
CN201910968784.X discloses a fireproof coating for tunnels, which comprises the following raw materials in parts by weight: 5-70g of high-alumina cement, 5-70g of ordinary cement, 1-10g of redispersible rubber powder, 9-32g of expanded perlite, 7-33g of expanded vermiculite, 5-15g of hollow microspheres, 15-35g of light calcium carbonate, 2-12g of bentonite, 2-9g of sepiolite, 1-10g of aluminum silicate fiber, 4-25g of flame-retardant smoke suppressant, 2-15g of aluminum hydroxide, 3-10g of magnesium hydroxide and 2-10g of sodium tetraborate. By means of the incombustibility and the low thermal conductivity of the material and the heat absorptivity of the material in the coating, the heating speed of the steel bar is delayed, the fire resistance is improved, the fire-proof limit is enhanced, the bonding strength between the coating and the inner wall of the tunnel is enhanced, the tunnel is effectively subjected to fire-proof treatment, and the loss caused by external fire and the cost of repairing is reduced.
In none of the above solutions, the adhesion is not emphasized, but if the adhesion is to be improved, the content of the high molecular organic substance such as emulsion must be increased, and if the content of the high molecular organic substance is increased, the fire-retardant property is deteriorated.
Therefore, the technical problem to be solved by the present application is: how to simultaneously ensure the anti-stripping performance and the fireproof performance of the fireproof coating of the outer wall.
Disclosure of Invention
One of the objectives of the present invention is to provide a fire-retardant coating for exterior walls, which can ensure that the coating has basic wall adhesion, the characteristics of the aqueous epoxy emulsion are increased adhesion, and simultaneously, both the aqueous epoxy emulsion and the styrene-acrylic emulsion have enhanced characteristics for the coating, and the aqueous epoxy emulsion and the styrene-acrylic emulsion have synergistic effects, and by matching with the aluminum silicate refractory fiber, the high-alumina cement has very strong strength, so that the whole coating can keep integrity, and under the condition of high-temperature roasting or years of use, even if the adhesion to the wall surface and the structural strength of organic matters are reduced, the main framework formed by the high-alumina cement can still keep a very stable state, and can pass a strict fire-retardant test.
The second purpose of the invention is to provide a preparation method of the coating.
In order to achieve the aim, the invention provides an exterior wall fireproof coating which comprises the following components in parts by weight:
5-10 parts of styrene-acrylic emulsion;
5-10 parts of water-based epoxy emulsion;
30-50 parts of high-alumina cement;
3-5 parts of aluminum silicate refractory fiber;
0.2-1 part of silane coupling agent;
3-5 parts of silica sol.
The fireproof coating for the outer wall comprises the following components in parts by weight:
6-7 parts of styrene-acrylic emulsion;
6-7 parts of water-based epoxy emulsion;
45-50 parts of high-alumina cement;
3-4 parts of aluminum silicate refractory fiber;
0.2-0.5 part of silane coupling agent;
3-5 parts of silica sol.
In the fire-retardant coating for the outer wall, the aluminum silicate refractory fibers are chopped fibers, and the average diameter of the aluminum silicate refractory fibers is 2.5-3.5 mu m; the length of the fiber is 1-5 mm.
In the exterior wall fireproof coating, the solid content of the water-based epoxy emulsion is 50%, and the epoxy equivalent is 1150.
In the exterior wall fireproof coating, the solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
In the fire-retardant coating for the outer wall, the high-alumina cement is 525 or 625 high-alumina cement.
In the fire-retardant coating for the exterior wall, the silane coupling agent is one of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (beta-methoxyethoxy) silane.
The invention also discloses a preparation method of the exterior wall fireproof coating, which comprises the steps of dispersing the aluminum silicate refractory fiber and the silane coupling agent into the styrene-acrylic emulsion in advance to obtain a styrene-acrylic emulsion mixture, mixing the silica sol into the high-alumina cement to obtain a high-alumina cement mixture, and mixing and stirring the styrene-acrylic emulsion mixture, the high-alumina cement mixture and the water-based epoxy emulsion to obtain the exterior wall fireproof coating.
The invention has the advantages of
Compared with the prior art, the coating disclosed by the invention can ensure that the coating has basic wall adhesion, the characteristic of the water-based epoxy emulsion is that the adhesion is increased, the water-based epoxy emulsion and the styrene-acrylic emulsion both have the characteristic of enhancing the coating, the water-based epoxy emulsion and the styrene-acrylic emulsion have a synergistic effect, and the aluminum silicate refractory fiber is matched, so that the high-alumina cement has very strong strength, the integrity of the whole coating is kept, and under the condition of high-temperature roasting or years of use, even if the adhesion to the wall surface and the structural strength of organic matters are reduced, a main framework formed by the high-alumina cement still can keep a very stable state, and can pass a more severe fire-proof test.
In order to ensure that the fiber used as the structure reinforcement can play a better structure reinforcement effect, the aluminum silicate refractory fiber with excellent compatibility with high-alumina cement is selected as a fiber framework, and meanwhile, the fiber is uniformly dispersed into styrene-acrylic emulsion through a silane coupling agent during preparation, so that the fiber can be fully combined with organic matters in the emulsion, and when a coating is formed, the aluminum silicate refractory fiber can be used as a bridge for connecting the organic matters and the high-alumina cement, and even if the organic matters are aged or softened, the coating has good overall strength, even if the adhesion force is reduced, but because the whole coating is finished, the coating can be well prevented from being stripped.
Drawings
FIG. 1 is a graph showing the results of the high temperature resistance test of example 1 and comparative examples 1 to 3;
fig. 2 is a graph showing the results of the freeze-thaw cycle performance tests of example 1 and comparative examples 1-2.
Detailed Description
The invention will now be further described with reference to the following examples, which are not to be construed as limiting the invention in any way, and any limited number of modifications which can be made within the scope of the claims of the invention are still within the scope of the claims of the invention.
In order to explain the technical contents of the present invention in detail, the following description is further made in conjunction with the embodiments.
Example 1:
the fireproof paint for the outer wall comprises the following components in parts by weight:
7 parts of styrene-acrylic emulsion;
7 parts of water-based epoxy emulsion;
525 parts of high-alumina cement;
4 parts of aluminum silicate refractory fiber;
0.5 part of vinyl triethoxysilane;
4 parts of silica sol.
Wherein the aluminum silicate refractory fiber is chopped fiber with the average diameter of 2.5-3.5 μm; the fiber length was 3 mm.
The solid content of the waterborne epoxy emulsion is 50 percent, and the epoxy equivalent is 1150.
The solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
The preparation method comprises the following steps of dispersing aluminum silicate refractory fibers and a silane coupling agent into styrene-acrylic emulsion in advance to obtain a styrene-acrylic emulsion mixture, mixing silica sol into high-alumina cement to obtain a high-alumina cement mixture, and mixing and stirring the styrene-acrylic emulsion mixture, the high-alumina cement mixture and the water-based epoxy emulsion to obtain the high-alumina cement.
Example 2:
the fireproof paint for the outer wall comprises the following components in parts by weight:
5 parts of styrene-acrylic emulsion;
10 parts of water-based epoxy emulsion;
525 parts of high-alumina cement;
5 parts of aluminum silicate refractory fiber;
0.2 part of vinyl trimethoxy silane;
3 parts of silica sol.
Wherein the aluminum silicate refractory fiber is chopped fiber with the average diameter of 2.5-3.5 μm; the fiber length was 3 mm.
The solid content of the waterborne epoxy emulsion is 50 percent, and the epoxy equivalent is 1150.
The solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
The preparation method is the same as example 1.
Example 3
The fireproof paint for the outer wall comprises the following components in parts by weight:
10 parts of styrene-acrylic emulsion;
5 parts of water-based epoxy emulsion;
40 parts of 625 high-alumina cement;
4 parts of aluminum silicate refractory fiber;
0.8 part of vinyl trimethoxy silane;
5 parts of silica sol.
Wherein the aluminum silicate refractory fiber is chopped fiber with the average diameter of 2.5-3.5 μm; the fiber length was 2 mm.
The solid content of the waterborne epoxy emulsion is 50 percent, and the epoxy equivalent is 1150.
The solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
The preparation method is the same as example 1.
Example 4
The fireproof paint for the outer wall comprises the following components in parts by weight:
6 parts of styrene-acrylic emulsion;
7 parts of water-based epoxy emulsion;
525 parts of high-alumina cement;
3.5 parts of aluminum silicate refractory fiber;
0.4 part of vinyl trimethoxy silane;
3 parts of silica sol.
Wherein the aluminum silicate refractory fiber is chopped fiber with the average diameter of 2.5-3.5 μm; the fiber length was 2 mm. The solid content of the waterborne epoxy emulsion is 50 percent, and the epoxy equivalent is 1150.
The solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
The preparation method is the same as example 1.
Example 5
The fireproof paint for the outer wall comprises the following components in parts by weight:
7 parts of styrene-acrylic emulsion;
6 parts of water-based epoxy emulsion;
525 parts of high-alumina cement;
3 parts of aluminum silicate refractory fiber;
0.5 part of vinyl trimethoxy silane;
5 parts of silica sol.
Wherein the aluminum silicate refractory fiber is chopped fiber with the average diameter of 2.5-3.5 μm; the fiber length was 2 mm. The solid content of the waterborne epoxy emulsion is 50 percent, and the epoxy equivalent is 1150.
The solid content of the styrene-acrylic emulsion is 48%, and the viscosity at 25 ℃ is 700 cps.
The preparation method is the same as example 1.
Comparative example 1
In general, as in example 1, glass fibers were used instead of the alumina-silicate refractory fibers.
Comparative example 2
The same as example 1, except that the formulation was as follows:
14 parts of styrene-acrylic emulsion;
525 parts of high-alumina cement;
4 parts of aluminum silicate refractory fiber;
0.5 part of vinyl triethoxysilane;
4 parts of silica sol.
Comparative example 3
The same as in example 1, except that the silica sol was not contained.
Performance testing
The invention mainly tests the high temperature (250 ℃) resistance and the adhesion performance of the paint film formed by the above example 1 and the comparative examples 1-3.
The alkali resistance performance test can be implemented by referring to the method specified in GB/T9265;
the high temperature resistance and the freeze-thaw cycle performance are tested by adopting a method developed by enterprises without adopting a national standard method.
The area of the base plate adopted in the high temperature resistance and freeze-thaw cycle performance test is 1 square meter, four sides of the base plate are sealed by resin, and the surface treatment of the base plate refers to JG/T23-2001.
And coating the paint on the bottom plate by adopting a blade coating method, wherein the wet thickness of the paint is 4mm +/-0.1 mm, and the surface is uniformly coated by blade coating.
When high temperature resistance performance test and freeze-thaw cycle performance test are carried out, the coating after blade coating needs to be cured for 72 hours;
the high temperature resistance is carried out in a constant temperature box, and the temperature is controlled to be 250 ℃.
The freeze-thaw cycle performance test is carried out for 5 cycles, each cycle is soaked in water with the temperature of 23 +/-2 ℃ for 18 hours, frozen at the temperature of minus 20 +/-2 ℃ for 3 hours, and baked at the temperature of 50 +/-2 ℃ for 3 hours.
The test results are shown in Table 1 below
| High temperature resistance | Alkali resistance | Freeze-thaw cycle performance test | |
| Example 1 | No abnormality | No abnormality | No abnormality |
| Comparative example 1 | Has cracks | No abnormality | Has cracks |
| Comparative example 2 | With flaking off | No abnormality | With flaking off |
| Comparative example 3 | Has cracks | No abnormality | With flaking off |
FIG. 1 shows the results of the high temperature resistance test of example 1 and comparative examples 1 to 3;
fig. 2 shows the results of the freeze-thaw cycle performance tests of example 1 and comparative examples 1-2.
Through the above tests it was found that:
1. compared with glass fiber, the aluminum silicate refractory fiber has the advantages of improving the structural strength (high temperature resistance and freeze-thaw cycle performance test);
2. the water-based epoxy emulsion has the functions of enhancing the structural strength and the bonding force, so that the water-based epoxy emulsion can obviously show the characteristic of improving the structural strength in the coating.
The aqueous epoxy emulsion and the styrene-acrylic emulsion have similar performances, but if the styrene-acrylic emulsion is used alone, the structural strength is obviously weakened. It can be judged that the aqueous epoxy emulsion and the styrene-acrylic emulsion have certain advantages for the performance of the structure enhancement performance of the aluminum silicate refractory fiber.
3. The silica sol has promotion effect on the performances of the waterborne epoxy emulsion, the styrene-acrylic emulsion and the aluminum silicate refractory fiber.
The reason why the freeze-thaw cycle and the high-temperature performance test are not carried out by adopting the national standard method is that the area of the bottom plate is small, and the performance of the performance test result is not specific.
That is to say, the coating has the performance advantage that the performance advantage is not easy to exert under the condition of a small continuous area, and the larger the area is, the better the overall strength performance is, and the coating is particularly suitable for application scenes such as external wall heat-insulating coatings, internal and external wall fireproof coatings and the like.
Claims (8)
1. The fireproof coating for the outer wall is characterized by comprising the following components in parts by weight:
5-10 parts of styrene-acrylic emulsion;
5-10 parts of water-based epoxy emulsion;
30-50 parts of high-alumina cement;
3-5 parts of aluminum silicate refractory fiber;
0.2-1 part of silane coupling agent;
3-5 parts of silica sol.
2. The exterior wall fireproof coating of claim 1, which comprises the following components in parts by weight:
6-7 parts of styrene-acrylic emulsion;
6-7 parts of water-based epoxy emulsion;
45-50 parts of high-alumina cement;
3-4 parts of aluminum silicate refractory fiber;
0.2-0.5 part of silane coupling agent;
3-5 parts of silica sol.
3. The exterior wall fireproof coating of claim 1, wherein the aluminum silicate refractory fibers are chopped fibers having an average diameter of 2.5-3.5 μm; the length of the fiber is 1-5 mm.
4. The exterior wall fireproof coating of claim 1, wherein the aqueous epoxy emulsion has a solid content of 50% and an epoxy equivalent weight of 1150.
5. The exterior wall fireproof coating of claim 1, wherein the styrene-acrylic emulsion has a solid content of 48% and a viscosity of 700cps at 25 ℃.
6. The exterior wall fire retardant coating of claim 1, wherein the high alumina cement is 525 or 625 high alumina cement.
7. The exterior wall fire-retardant coating of claim 1, wherein the silane coupling agent is one of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (β -methoxyethoxy) silane.
8. A preparation method of an exterior wall fireproof coating is characterized in that aluminum silicate refractory fibers and a silane coupling agent are pre-dispersed into styrene-acrylic emulsion to obtain a styrene-acrylic emulsion mixture, silica sol is mixed into high-alumina cement to obtain a high-alumina cement mixture, and the styrene-acrylic emulsion mixture, the high-alumina cement mixture and a water-based epoxy emulsion are mixed and stirred to obtain the exterior wall fireproof coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Application publication date: 20211231 |