CN115637084A - Temperature-resistant heat-insulating coating for metal surface - Google Patents
Temperature-resistant heat-insulating coating for metal surface Download PDFInfo
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- CN115637084A CN115637084A CN202110818246.XA CN202110818246A CN115637084A CN 115637084 A CN115637084 A CN 115637084A CN 202110818246 A CN202110818246 A CN 202110818246A CN 115637084 A CN115637084 A CN 115637084A
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- 238000000576 coating method Methods 0.000 title claims abstract description 123
- 239000011248 coating agent Substances 0.000 title claims abstract description 122
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 59
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 66
- 239000011521 glass Substances 0.000 claims abstract description 38
- 239000011324 bead Substances 0.000 claims abstract description 32
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000839 emulsion Substances 0.000 claims abstract description 27
- SOGFHWHHBILCSX-UHFFFAOYSA-J prop-2-enoate silicon(4+) Chemical compound [Si+4].[O-]C(=O)C=C.[O-]C(=O)C=C.[O-]C(=O)C=C.[O-]C(=O)C=C SOGFHWHHBILCSX-UHFFFAOYSA-J 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000003755 preservative agent Substances 0.000 claims abstract description 15
- 230000002335 preservative effect Effects 0.000 claims abstract description 15
- 239000004593 Epoxy Substances 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 230000002238 attenuated effect Effects 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 230000009477 glass transition Effects 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- -1 polysiloxane Polymers 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 7
- 239000008158 vegetable oil Substances 0.000 claims description 7
- 239000011325 microbead Substances 0.000 claims description 5
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 150000003376 silicon Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000000945 filler Substances 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 abstract description 5
- 125000003545 alkoxy group Chemical group 0.000 abstract description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
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- 239000003973 paint Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
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- 239000007767 bonding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a temperature-resistant heat-insulating coating for a metal surface, which is characterized by comprising the following components in part by weight: comprises 30 to 40 portions of hollow glass bead, 30 to 50 portions of silicon acrylate emulsion, 0 to 20 portions of organic silicon resin, 10 to 20 portions of silica sol, 2 to 5 portions of water, 0.3 to 0.5 portion of flatting agent, 1 to 3 portions of metal coating adhesion agent, 4 to 10 portions of water retention agent, 0.2 to 0.5 portion of preservative and 0.5 to 0.8 portion of defoaming agent. By adding the metal coating adhesion agent, alkoxy in the epoxy modified siloxane can directly react with metal surface oxide to form covalent bonds and coordination bonds, so that the bonding strength of the coating and a metal substrate is improved; in addition, the coating filler is totally closed-cell hollow glass beads with low thermal conductivity, and the filler interacts with each base material in a coating system to form a closed-cell network and an open-cell network, so that the coating has lower thermal conductivity and more excellent heat insulation performance.
Description
Technical Field
The invention relates to a coating, in particular to a temperature-resistant heat-preservation coating for a metal surface.
Background
In the process of using the metal shell, the metal pipeline, the metal mould and the like of the industrial heat device, heat loss is caused, so that energy waste is caused, and the temperature of the working environment is high. The traditional temperature-resistant inorganic heat-insulating paint is prepared by adopting water glass, silica sol and the like as binders and adding inorganic powder as fillers, has high heat conductivity coefficient, is thick in order to achieve a heat-insulating effect, is generally coated with a layer with the thickness of more than 8mm, is long in spraying work time, is poor in aesthetic property and water resistance, and is easy to crack in long-term use. In addition, the traditional inorganic temperature-resistant heat-insulating coating has poor bonding performance with metal materials and low bonding strength, and particularly, the coating falls off due to the inconsistent expansion coefficients of the coating and the metal materials under the high-temperature condition. In order to improve the bonding strength of the heat-insulating coating and the metal material, reduce the heat conductivity coefficient of the coating and improve the heat-insulating property of the coating, the invention provides a novel heat-insulating coating. The heat conductivity coefficient of the coating is reduced by adding the hollow glass bead material, the volume density of the coating is small, and the bonding strength and the leveling construction performance of the coating and the metal material are improved by adding the auxiliary agent.
The invention discloses an ultrathin high-temperature-resistant heat-insulating coating, and provides an energy-saving functional ultrathin high-temperature-resistant heat-insulating coating which can resist 300 ℃ and has a coating thickness of 2-3 mm and is mainly applied to the outer surfaces of a high-temperature heating furnace, a high-temperature medium storage tank, a high-temperature pipeline, a heat power pipeline and the like. The paint is prepared by mixing resin emulsion, hollow glass beads, pigment, rare earth oxide, an auxiliary agent and water, wherein the mixture of pure acrylic resin, a special monomer modified self-crosslinking acrylate copolymer and lithium silicate is used as a binding agent, and the pure acrylic resin and the special monomer self-crosslinking acrylate copolymer have low temperature resistance, are easy to generate performance attenuation in a temperature range of 200-300 ℃, are easy to generate performance attenuation under a high-temperature condition for a long time, and are easy to age. In addition, the rare earth oxide is added in the technology, so that the cost of the coating is increased, and the technology is not economical enough for the field of heat-insulating coatings.
The invention discloses a heat-insulating coating using hollow glass beads and a preparation method thereof, and the patent with publication number CN 106892626A reduces the heat conductivity coefficient of the coating by adding the hollow glass beads into a mixed coating material, wherein the mixed coating material is composed of superfine putty powder lime powder and titanium dioxide powder mixture, white cement, rubber powder, bleaching bead powder, natural resin, styrene-acrylic emulsion, formaldehyde absorbent, film-forming assistant, defoamer, plant pigment and nano-antibacterial agent. In the technology, a large amount of inorganic fine powder is added into a coating system, the volume weight of the coating is relatively large, and the coating is not suitable for heat preservation of metal surfaces. The heat-insulating coating provided by the prior art is mostly prepared by adding inorganic powder into an inorganic bonding agent, the coating has low bonding strength with a metal substrate and higher heat conductivity coefficient, and is generally thicker in order to achieve the heat-insulating effect, relatively lower in bonding strength with the metal substrate, poor in water resistance and oil stain resistance, and easy to crack in the long-term use process. In addition, the organic resin is adopted as the coating of the binding agent, the adopted organic resin has low temperature resistance, and the performance of the coating is attenuated when the coating is used under the high-temperature condition for a long time, so that the service life of the coating is shortened.
Disclosure of Invention
Aiming at the problems of low bonding strength, high heat conductivity coefficient and large volume weight of the high-temperature-resistant heat-insulating coating and a metal base material in the prior art, the invention provides the temperature-resistant heat-insulating coating which is simple in process, small in volume weight, low in heat conductivity coefficient and high in bonding strength with the metal base material.
The technical scheme of the invention is a temperature-resistant heat-insulating coating for metal surfaces, which is characterized in that: comprises 30 to 40 parts of hollow glass beads, 30 to 50 parts of silicon acrylate emulsion, 0 to 20 parts of organic silicon resin, 10 to 20 parts of silica sol, 2 to 5 parts of water, 0.3 to 0.5 part of flatting agent, 1 to 3 parts of metal coating adhesion agent, 4 to 10 parts of water retention agent, 0.2 to 0.5 part of preservative and 0.5 to 0.8 part of defoaming agent;
fully stirring and uniformly mixing the hollow glass beads and water in a low-speed stirrer to ensure that the hollow glass beads fully absorb water, sequentially adding the silica sol, the silicon acrylate emulsion and the organic silicon resin, fully stirring and uniformly mixing, then adding the flatting agent, the metal coating adhesive, the water-retaining agent and the preservative, fully mixing and stirring, adding the defoaming agent, stirring and defoaming to obtain the temperature-resistant heat-insulating coating for the metal surface.
Furthermore, the particle size of the hollow glass bead is 20 to 70 μm,
further, the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
further, the organic silicon resin is one of methyl phenyl silicon resin and epoxy modified silicon resin, and the solid content is 50%;
furthermore, the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
further, the solid content of the leveling agent is 50-55%;
furthermore, the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm3
Further, the water-retaining agent is grafted ethoxylate, and the flash point is 200-250 ℃;
further, the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
Further, the coating is applied to the surface of a steel plate at the temperature of 150-300 ℃, the thickness of the coating is 4-5 mm, the heat is preserved for 1h, and the temperature can be attenuated by 60-118 DEG C
The invention has the beneficial effects that:
(1) The silicon acrylate emulsion has quick drying property and good water resistance, can protect and stabilize the silica sol before the silica sol is cured after being compounded with the silica sol, and improves the bonding strength of a coating and a metal substrate;
(2) The coating system of the invention is added with the silica sol and the organic silicon resin, and simultaneously takes the silica sol and the silicon acrylate emulsion as the binder, the organic silicon resin and the silica sol improve the bonding strength and the use temperature of the coating, and the coating can be used at 150-300 ℃ for a long time;
(3) By adding the metal coating adhesion agent, alkoxy in the epoxy modified siloxane can directly react with metal surface oxide to form covalent bonds and coordination bonds, so that the bonding strength of the coating and a metal substrate is improved;
(4) According to the invention, hollow glass beads are used as a coating filler, and a large number of air holes are sealed in the hollow glass beads, so that the thermal conductivity and the volume weight of the coating are reduced, the thermal conductivity of the coating can reach 0.03-0.05W/(m & lt K & gt), and the wet volume weight of the coating is 400-500 kg/m & lt 3 >
(5) According to the invention, the coating fillers are all closed-cell hollow glass beads with low thermal conductivity, and the fillers interact with all base materials in a coating system to form a closed-cell network and an open-cell network, so that the coating has lower thermal conductivity and more excellent heat insulation performance;
(6) The hollow glass microspheres are spherical and have good fluidity, so that the introduction of the hollow glass microspheres enables the coating to be easily sprayed and smeared.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to various examples.
Example 1
Embodiment 2 provides a temperature-resistant heat-insulating coating for a metal surface, which is prepared by selecting 35 parts of hollow glass beads, 48 parts of a silicon acrylate emulsion, 12 parts of silica sol, 5 parts of water, 0.5 part of a leveling agent, 2 parts of a metal coating adhesion agent, 4 parts of a water-retaining agent, 0.2 part of a preservative and 0.5 part of a defoaming agent, fully stirring and mixing the hollow glass beads and the water uniformly in a low-speed stirrer to ensure that the hollow glass beads fully absorb the water, sequentially adding the silica sol and the silicon acrylate emulsion, fully stirring and mixing the mixture uniformly, adding the leveling agent, the metal coating adhesion agent, the water-retaining agent and the preservative, fully stirring the mixture, and adding the defoaming agent to stir and defoam the mixture.
In the embodiment, the particle size of the hollow glass bead is 60 to 70 μm;
the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
the solid content of the flatting agent is 50-55 percent;
the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm 3 ；
The water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
The thermal conductivity of the coating was 0.04W/(m. K);
the volume weight of the coating is 470kg/m 3 ；
The bonding strength of the coating and the steel plate is 4.3MPa;
the coating is coated on the surface of a steel plate at 150 ℃, the thickness of the coating is 4mm, the heat is preserved for 1h, and the temperature is attenuated by 60 ℃.
Example 2
Embodiment 2 provides a temperature-resistant heat-insulating coating for a metal surface, which is prepared by selecting 40 parts of hollow glass beads, 50 parts of a silicon acrylate emulsion, 10 parts of silica sol, 2 parts of water, 0.5 part of a leveling agent, 3 parts of a metal coating adhesion agent, 10 parts of a water-retaining agent, 0.5 part of a preservative and 0.5 part of a defoaming agent, fully stirring and mixing the hollow glass beads and the water uniformly in a low-speed stirrer to ensure that the hollow glass beads fully absorb water, sequentially adding the silica sol and the silicon acrylate emulsion, fully stirring and mixing uniformly, adding the leveling agent, the metal coating adhesion agent, the water-retaining agent and the preservative, fully mixing and stirring, and adding the defoaming agent to stir and defoam.
The grain diameter of the hollow glass micro-beads is 30-50 μm,
the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
the solid content of the flatting agent is 50-55%;
the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm 3
The water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
The thermal conductivity of the coating was 0.036W/(m. K);
the volume weight of the coating is 450kg/m 3 ；
The bonding strength of the coating and the steel plate is 5.2MPa;
the coating is coated on the surface of a steel plate at 150 ℃, the thickness of the coating is 4mm, the heat is preserved for 3 hours, and the temperature is attenuated by 75 ℃.
Example 3
Embodiment 3 provides a temperature-resistant heat-insulating coating for a metal surface, which is prepared by selecting 40 parts of hollow glass beads, 30 parts of a silicon acrylate emulsion, 20 parts of an organic silicon resin, 10 parts of silica sol, 5 parts of water, 0.5 part of a leveling agent, 1 part of a metal coating adhesion agent, 5 parts of a water-retaining agent, 0.4 part of a preservative and 0.5 part of a defoaming agent, fully stirring and mixing the hollow glass beads and the water in a low-speed stirrer uniformly to enable the hollow glass beads to fully absorb the water, sequentially adding the silica sol and the silicon acrylate emulsion, fully stirring and mixing the silica sol and the silicon acrylate emulsion uniformly, adding the leveling agent, the metal coating adhesion agent, the water-retaining agent and the preservative, fully stirring and adding the defoaming agent to stir and defoam the mixture.
The grain diameter of the hollow glass micro-beads is 20-40 μm,
the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
the organic silicon resin is methyl phenyl silicon resin, and the solid content is 50 percent;
the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
the solid content of the flatting agent is 50-55 percent;
the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm 3
The water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
The thermal conductivity of the coating was 0.05W/(m. K);
the volume weight of the coating is 500kg/m 3 ；
The bonding strength of the coating and the steel plate is 5.6MPa;
the coating is coated on the surface of a steel plate at the temperature of 300 ℃, the thickness of the coating is 5mm, the heat is preserved for 1h, and the temperature is attenuated by 118 ℃.
Example 4
Embodiment 4 provides a temperature-resistant heat-insulating coating for a metal surface, which is prepared by selecting 50 parts of hollow glass beads, 40 parts of a silicon acrylate emulsion, 10 parts of silica sol, 0.3 part of a leveling agent, 3 parts of a metal coating adhesion agent, 8 parts of a water-retaining agent, 0.3 part of a preservative and 0.8 part of a defoaming agent, fully stirring and uniformly mixing the hollow glass beads, the silica sol and the silicon acrylate emulsion, adding the leveling agent, the metal coating adhesion agent, the water-retaining agent and the preservative, fully stirring and defoaming the mixture by adding the defoaming agent, and stirring and defoaming the mixture.
The grain diameter of the hollow glass micro-beads is 50-70 μm,
the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
the solid content of the flatting agent is 50-55 percent;
the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm 3 ；
The water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
The thermal conductivity of the coating was 0.033W/(m. K);
the volume weight of the coating is 400kg/m 3 ；
The bonding strength of the coating is 4.8MPa;
the coating is coated on the surface of a steel plate at 200 ℃, the thickness of the coating is 5mm, the heat is preserved for 1h, and the temperature is attenuated by 90 ℃.
Example 5
Embodiment 5 provides a temperature-resistant heat-insulating coating for a metal surface, which is prepared by selecting 37 parts of hollow glass beads, 48 parts of a silicon acrylate emulsion, 10 parts of silica sol, 4 parts of water, 0.3 part of a leveling agent, 2 parts of a metal coating adhesion agent, 7 parts of a water-retaining agent, 0.4 part of a preservative and 0.6 part of a defoaming agent, fully stirring and mixing the hollow glass beads and the water uniformly in a low-speed stirrer to ensure that the hollow glass beads fully absorb the water, sequentially adding the silica sol and the silicon acrylate emulsion, fully stirring and mixing the mixture uniformly, adding the leveling agent, the metal coating adhesion agent, the water-retaining agent and the preservative, fully stirring the mixture, and adding the defoaming agent to stir and defoam the mixture.
The grain diameter of the hollow glass micro-beads is 30-60 mu m,
the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
the solid content of the flatting agent is 50-55 percent;
the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm 3 ；
The water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
The thermal conductivity of the coating was 0.044W/(m. K);
the volume weight of the coating is 464kg/m 3 ；
The bonding strength of the coating is 4.2MPa;
the coating is coated on the surface of a steel plate at 250 ℃, the thickness of the coating is 5mm, the heat is preserved for 1h, and the temperature is attenuated by 102 ℃.
It is to be understood by those skilled in the art that the examples are merely illustrative of exemplary implementations of the invention and are not intended to limit the scope of the invention. The details of the embodiments are not to be interpreted as limiting the scope of the invention, and any obvious changes, such as equivalent alterations, simple substitutions and the like, based on the technical solution of the invention, can be interpreted without departing from the spirit and scope of the invention.
Claims (10)
1. A temperature-resistant heat-insulating coating for metal surfaces is characterized in that: comprises 30 to 40 parts of hollow glass beads, 30 to 50 parts of silicon acrylate emulsion, 0 to 20 parts of organic silicon resin, 10 to 20 parts of silica sol, 2 to 5 parts of water, 0.3 to 0.5 part of flatting agent, 1 to 3 parts of metal coating adhesion agent, 4 to 10 parts of water retention agent, 0.2 to 0.5 part of preservative and 0.5 to 0.8 part of defoaming agent; fully stirring and uniformly mixing the hollow glass beads and water in a low-speed stirrer to ensure that the hollow glass beads fully absorb water, sequentially adding the silica sol, the silicon acrylate emulsion and the organic silicon resin, fully stirring and uniformly mixing, then adding the flatting agent, the metal coating adhesive, the water-retaining agent and the preservative, fully mixing and stirring, adding the defoaming agent, stirring and defoaming to obtain the temperature-resistant heat-insulating coating for the metal surface.
2. The temperature-resistant and heat-insulating coating for metal surfaces according to claim 1, characterized in that: the grain diameter of the hollow glass micro-beads is 20-70 μm,
3. the temperature-resistant and heat-insulating coating for metal surfaces according to claim 1, characterized in that: the solid content of the silicon acrylate emulsion is 46-48%, and the glass transition temperature is 10-20 ℃;
4. the temperature-resistant and heat-insulating coating for metal surfaces according to claim 1, characterized in that: the organic silicon resin is one of methyl phenyl silicon resin and epoxy modified silicon resin, and the solid content is 50%;
5. the temperature-resistant and heat-insulating coating for metal surfaces according to claim 1, characterized in that: the solid content of the silica sol is 40 percent, and the particle size is 10-20 nm;
6. the temperature-resistant and heat-insulating coating for metal surfaces according to claim 1, characterized in that: the solid content of the flatting agent is 50-55%;
7. the temperature-resistant and heat-insulating coating for the metal surface according to claim 1, characterized in that: the metal coating adhesion agent is epoxy modified polysiloxane with the density of 1.03-1.08 g/cm3
8. The temperature-resistant and heat-insulating coating for the metal surface according to claim 1, characterized in that: the water-retaining agent is grafted ethoxylate and has a flash point of 200-250 ℃;
9. the temperature-resistant and heat-insulating coating for the metal surface according to claim 1, characterized in that: the defoaming agent is a mixture of vegetable oil, polypropylene glycol and polyether copolymer.
10. The temperature-resistant and heat-insulating coating for the metal surface according to claim 1, characterized in that: the coating is applied to the surface of a steel plate at the temperature of 150-300 ℃, the thickness of the coating is 4-5 mm, the heat is preserved for 1h, and the temperature can be attenuated by 60-118 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117511401A (en) * | 2023-12-05 | 2024-02-06 | 山东蓝昕环保测试分析有限公司 | Pipeline heat-insulating anticorrosive paint and preparation method thereof |
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| EP2557141A1 (en) * | 2011-08-10 | 2013-02-13 | AMATO GmbH Brandschutzsysteme | Laminar fire prevention component, use of same and method for producing same |
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