CN111995916A - Ultrathin water-based fireproof temperature control coating and preparation method thereof - Google Patents
Ultrathin water-based fireproof temperature control coating and preparation method thereof Download PDFInfo
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The application relates to an ultra-thin water-based fireproof temperature control coating and a preparation method thereof, wherein the ultra-thin water-based fireproof temperature control coating comprises an energy storage connection primer layer and at least one ultra-thin water-based fireproof temperature control coating which are sequentially coated; the energy storage connection primer layer comprises the following components in parts by weight: acrylic acid copolymer emulsion; hollow ceramic microspheres; phase change powder microcapsules; the ultrathin water-based fireproof temperature control coating comprises the following components in parts by weight: an aqueous styrene-acrylate copolymer; water; mixing an auxiliary agent; titanium dioxide; expanding the flame-retardant powder; phase change powder microcapsules; a film-forming aid; which has the advantage of improving the ability of the fire-retardant coating to reject heat. The preparation method comprises the following steps: and (3) brushing an energy storage connection primer on the surface to be coated, continuously brushing the ultrathin water-based fireproof temperature control coating, and drying at normal temperature to obtain the water-based fireproof temperature control coating. In addition, the preparation method has the advantage of avoiding the combustion of the vehicle body.
Description
Technical Field
The application relates to the field of fireproof coatings, in particular to an ultrathin water-based fireproof temperature control coating.
Background
At present, the fire protection scheme of the battery compartment generally adopts a flame retardant material to construct the battery compartment, but the method has several disadvantages: one is that the doped flame retardant is easy to cause the strength reduction of the car body material and also causes the cost of the car body material to be greatly increased; secondly, the car body material doped with the flame retardant can not burn when subjected to high temperature, but can generate softening and fuming phenomena, so that the battery car body is scrapped, and the difficulty of car body recovery treatment is increased; and for a large amount of produced storage batteries, a method of adding a flame retardant cannot be adopted to endow the storage batteries with fireproof performance.
Most of the fire-proof coatings in the related art cannot be applied to the plastic surface inside the battery container. The fire-retardant coating of the storage battery bin before improvement is mainly a non-combustible or fire-retardant coating. The thickness of the non-combustible or fire-retardant coating is generally 30 to 80 μm, and is composed of a large amount of inorganic non-combustible materials and flame-retardant materials, and the coating itself is not combustible or does not support combustion when subjected to high temperature. However, the non-combustible or fire-retardant coating can only play a role in protecting the battery compartment temporarily when flame just occurs, and the plastic material of the battery compartment is softened and burnt because the coating cannot block heat and cannot form continuous protection.
Aiming at the related technologies, the inventor thinks that the non-combustible or fire-retardant fireproof coating can only play a role in protecting the battery compartment temporarily when flame just occurs, and the plastic material of the battery compartment is softened and burnt because the non-combustible or fire-retardant fireproof coating can not block heat and can not form protection continuously.
Disclosure of Invention
In order to improve the heat-insulating capability of the fireproof coating, the application provides an ultrathin water-based fireproof temperature-control coating and a preparation method thereof.
In a first aspect, the application provides an ultra-thin water-based fireproof temperature control coating, which adopts the following technical scheme:
an ultra-thin water-based fireproof temperature control coating comprises an energy storage connection primer layer and at least one ultra-thin water-based fireproof temperature control coating which are sequentially coated; the energy storage connecting primer layer comprises the following components in parts by weight: 60-80 parts of acrylic copolymer emulsion; 10-20 parts of hollow ceramic microspheres; 10-20 parts of phase change powder microcapsules; the ultrathin water-based fireproof temperature control coating comprises the following components in parts by weight: 10-20 parts of a water-based styrene-acrylate copolymer; 10-20 parts of water; 2-5 parts of a mixed auxiliary agent; 5-10 parts of titanium dioxide; 40-60 parts of expansion flame-retardant powder; 8-15 parts of phase change powder microcapsules; 2-5 parts of a film-forming assistant.
Through adopting above-mentioned technical scheme, because the air in the hollow ceramic microsphere casing is hot bad conductor, therefore at the indoor wall of storage battery first coating one deck hollow ceramic microsphere, can restrict the motion space of external high heat air gas molecule when passing the coating to the air convection inside and outside the storage battery room is restricted. The phase-change powder microcapsules can absorb heat penetrating through the hollow ceramic microspheres through phase change at high temperature, and can release the absorbed heat after the temperature of the external environment is reduced, so that the storage battery is in a proper temperature for a long time due to the heat absorption-heat release energy storage characteristics of the phase-change material. Thereby the fireproof temperature control coating obtains the effect of heat insulation.
Preferably, the hollow ceramic microspheres are soda lime borosilicate hollow glass microspheres.
By adopting the technical scheme, the thermal conductivity coefficient of the soda lime borosilicate hollow glass microspheres is not more than 0.1W/(m.K), and the hollow ceramic microspheres play a role in isolating heat at high temperature; under the condition of normal temperature, the hollow glass microspheres and the phase change powder microcapsules are cooperated to keep the temperature inside the storage battery bin constant.
Preferably, the mixing auxiliary agent is prepared from a dispersing agent, a defoaming agent and an amine neutralizing agent in a weight ratio of 3-5: 0.5-1.5: 0.5-1.5 by mixing; the dispersant is BYK 190; the defoaming agent is BYK 024; the amine neutralizer is DMAE.
By adopting the technical scheme, the dispersing agent contains pigment affinity groups, so that the dispersing capacity of the pigment in the solvent is improved, and the pigment in the coating can be uniformly dispersed. The defoaming agent can reduce the foam in the coating in the stirring process and reduce the possibility of uneven surface of the coating caused by the foam in the coating brushing process. Amine neutralizers can improve pigment dispersion and pH stability of the coating.
Preferably, the expanded flame-retardant powder material is prepared from micronized melamine, pentaerythritol and ammonium polyphosphate in a weight ratio of 1.5-2.5: 1.5-2.5: 5-7, and mixing.
By adopting the technical scheme, the melamine serving as the gas source, the pentaerythritol serving as the carbon source and the ammonium polyphosphate serving as the acid source can generate a synergistic effect and rapidly expand when the storage battery is at high temperature or on fire; because the carbon layer pentaerythritol has low thermal conductivity, the synergistic effect of the three components in the intumescent flame retardant powder can be maintained for a long time, and the vehicle body is protected from being damaged.
Preferably, the core material of the phase change powder microcapsule is paraffin.
By adopting the technical scheme, the paraffin can be decomposed to generate a large amount of water vapor and CO when being heated to the temperature of more than 160 DEG C2(ii) a Steam, CO2And the gas source melamine in the expansion flame-retardant powder material, so that the carbon layer is efficiently expanded to become a more uniform and compact heat insulation layer, and heat can be effectively isolated.
Preferably, the aqueous styrene-acrylate copolymer is a white emulsion with a solid content of 55%, a viscosity of 400-100mpa.s and a Tg value of-8 ℃.
By adopting the technical scheme, the water-based styrene-acrylate copolymer can play a flame-retardant role under the combustion condition, and the flame retardant property of the coating is improved.
Preferably, the coating thickness of the energy storage connection primer is 100-200 microns, and the coating thickness of the ultra-thin type water-based fireproof temperature control coating is 300-900 microns.
By adopting the technical scheme, the heat absorption effect is better along with the increase of the thickness of the ultrathin aqueous fireproof temperature control coating; when the thickness of the coating is 900 micrometers, the thickness of the expanded coating can reach 5 centimeters, and is equivalent to the volume capable of being accommodated in a storage battery.
In a second aspect, the application provides a method for preparing an ultrathin aqueous fireproof temperature-control coating, which comprises the following steps:
adding hollow ceramic microspheres and phase change powder microcapsules into the connecting emulsion under the stirring state of 200-400 rpm; stirring at the speed of 200 plus 400rpm after the charging is finished until the materials are fully mixed to obtain the energy storage connecting primer;
dissolving the mixed assistant in a solvent, and stirring at 200-400rpm for 3-8 min; adding titanium dioxide and expanded flame-retardant powder under the stirring state of 400-; sequentially adding the phase change powder microcapsules and the film forming additive under the stirring state of 400-600rpm, and adding the fireproof emulsion after stirring for 5-15min at 400-600 rpm; stirring at 200-;
and (3) brushing an energy storage connection primer on the surface to be coated, continuously brushing the ultrathin aqueous fireproof temperature control coating, and drying at normal temperature after the ultrathin aqueous fireproof temperature control coating is coated to obtain the aqueous fireproof temperature control coating.
By adopting the technical scheme, when the surface to be coated is brushed, the energy storage connecting primer needs to be brushed firstly, the hollow ceramic microspheres in the energy storage connecting primer insulate heat, and the overflowing heat is further absorbed by the phase change powder microcapsules. The ultra-thin water-based fireproof temperature control coating is continuously coated, and due to the synergistic effect among the gas source, the carbon source and the acid source and the synergistic effect of the paraffin and the gas source, the coating has excellent expansion fireproof performance, and can rapidly expand towards the inner side of the battery cell when the battery cell is at high temperature or on fire; the carbon layer expanded by 40-50 times can extrude and fill the space of the battery chamber, thereby effectively extinguishing open fire and further avoiding the vehicle body from burning. Because the hollow ceramic microspheres can be broken by high-speed stirring, the hollow ceramic microspheres and the phase change powder microcapsules are mixed by low-speed stirring. As the ultrathin water-based fireproof temperature-control coating becomes viscous after the mixing auxiliary agent, the titanium dioxide and the expanded flame-retardant powder are added, and the mixture cannot be uniformly dispersed due to low-speed stirring, the mixture is stirred at 800-1200 rpm.
Preferably, the specific implementation mode of brushing the ultrathin water-based fireproof temperature-control coating is as follows: brushing 1-3 paths of ultrathin aqueous fireproof temperature-control paint with the dry film thickness of 300-.
By adopting the technical scheme, the heat insulation performance of the ultrathin water-based fireproof temperature control coating is gradually improved along with the improvement of the film thickness of the coating, when the coating thickness reaches 900 micrometers, the expanded coating thickness can reach 5 centimeters, and is equivalent to the volume capable of being accommodated in a storage battery, the coating thickness is further increased, although the temperature of the surface of a protected vehicle body can be further reduced, the occupied space of the expanded coating is too large, the cost is increased, and the construction period of the coating is prolonged.
Drawings
FIG. 1 is a graph of the temperature change of the backside of the coatings of examples 1, 4, 5 and comparative examples 1, 2 provided herein;
FIG. 2 is a graph of the temperature change of the backside of the coating of example 5 and comparative examples 3 and 4 provided herein;
FIG. 3 is a graph of the temperature change of the backside of the coating of example 5 and comparative examples 5, 6, and 7 provided herein;
FIG. 4 is a graph of the temperature profile of the backside of the coating of examples 1-3 provided herein.
FIG. 5 is a graph of the temperature change of the backside of the coating of example 5, comparative example 3, and comparative examples 8-10 provided herein.
Detailed Description
The present application is described in further detail below with reference to figures 1-4 and examples.
The embodiment of the application discloses an ultrathin water-based fireproof temperature control coating and a preparation method thereof. In the examples of the present application, the raw materials and auxiliary materials used are as follows, but not limited thereto:
examples
Example 1
An ultra-thin water-based fireproof temperature control coating comprises an energy storage connection primer layer and an ultra-thin water-based fireproof temperature control coating;
as shown in Table 1, the energy storage connecting primer comprises the following components (in Kg) in input amount:
TABLE 1
| Components | Content (wt.) |
| Acrylic |
70 |
| Hollow ceramic microspheres | 15 |
| Phase-change powder microcapsule | 15 |
As shown in Table 2, the ultra-thin type aqueous fire-proof temperature-control coating comprises the following components (unit Kg) by weight:
TABLE 2
| Components | Content (wt.) | Components | Content (wt.) |
| Fire-proof emulsion | 15 | Titanium white powder | 8 |
| Deionized water | 15 | Intumescent flame-retardant powder | 50 |
| Mixing aid | 4 | Phase- |
10 |
| Film forming aid | 3 |
The mixing auxiliary agent comprises the following components in input amount: 3.2kg of dispersing agent, 0.4kg of defoaming agent and 0.4kg of amine neutralizing agent.
The intumescent flame-retardant powder comprises the following components in input amount: 10kg of ammonium polyphosphate, 10kg of micronized melamine and 30kg of pentaerythritol.
An ultrathin aqueous fireproof temperature control coating comprises the following steps:
mixing chitosan with deacetylation degree of 85% and acetic acid with mass fraction of 0.5%, wherein the solid-liquid ratio is 0.018g/mL, and obtaining a mixed solution; heating the mixed solution to 45 ℃, preserving heat for 13min, dropwise adding liquid paraffin into the mixed solution, wherein the volume ratio of the mixed solution to the paraffin is 21: 1; stirring for 4h to obtain an emulsion; dropwise adding the emulsion into span80 liquid paraffin, wherein the volume ratio of the emulsion to the span80 liquid paraffin is 1: and 4.5, stirring for 3.5 hours to obtain a mixed solution. And (3) putting glutaraldehyde into the mixed solution, reacting at normal temperature for 2.5h with the solid-to-liquid ratio of 0.05g/mL, and drying to obtain the phase change energy storage microcapsule.
The preparation method of the phase-change powder microcapsule refers to Chinese patent with an authorization publication number of CN101947423B, and discloses a preparation method of a phase-change energy-storage microcapsule, wherein the phase-change temperature of the phase-change powder microcapsule is 38 ℃, a core material is paraffin with a melting point of 39 ℃, and the particle size of the phase-change powder microcapsule is 100 microns.
Pouring the acrylic copolymer emulsion into a container, and adding hollow ceramic microspheres and phase-change powder microcapsules into the acrylic copolymer emulsion under the stirring state of 300 rpm; and stirring at 300rpm for 10min after the addition is finished to obtain the energy storage connection primer.
Dispersing agent, defoaming agent and amine neutralizer according to the weight ratio of 8: 1: 1 is dissolved in deionized water and stirred for 5min at 300 rpm; continuously adding titanium dioxide under the stirring state of 500rpm, and mixing according to the weight ratio of 1: 1: 3 adding ammonium polyphosphate, micronized melamine and pentaerythritol, and stirring at 1000rpm for 20 min; and sequentially adding the phase-change powder microcapsules and the film-forming auxiliary agent under the stirring state of 500rpm, stirring for 10min at 500rpm, adding the fireproof emulsion, and stirring at 300rpm until the mixture is fully mixed to obtain the ultrathin water-based fireproof temperature-control coating.
Cleaning the surface to be coated, brushing an energy storage connecting primer with the thickness of 200 microns on the surface to be coated, and brushing an ultrathin water-based fireproof temperature control coating with the dry film thickness of 300 microns after 10 hours. The temperature of the coating environment is not lower than 15 ℃, the relative humidity is not higher than 80%, and the coating is dried for 7 days at normal temperature after the coating is finished, so that the ultrathin water-based fireproof temperature control coating is obtained.
Example 2
An ultra-thin water-based fireproof temperature control coating comprises an energy storage connection primer layer and an ultra-thin water-based fireproof temperature control coating;
as shown in Table 3, the energy storage connecting primer comprises the following components (in Kg) in input amount:
TABLE 3
| Components | Content (wt.) |
| Acrylic acid copolymer emulsion | 60 |
| Hollow |
10 |
| Phase- |
10 |
As shown in Table 4, the ultra-thin type aqueous fire-proof temperature-control coating comprises the following components (unit Kg) by weight:
TABLE 4
| Components | Content (wt.) | Components | Content (wt.) |
| Fire- |
10 | Titanium white powder | 5 |
| |
10 | Intumescent flame-retardant powder | 40 |
| Mixing aid | 2 | Phase-change powder microcapsule | 8 |
| Film forming aid | 2 |
The mixing auxiliary agent comprises the following components in input amount: 1.75kg of dispersing agent, 0.125kg of defoaming agent and 0.125kg of amine neutralizing agent.
The intumescent flame-retardant powder comprises the following components in input amount: 7.5kg of ammonium polyphosphate, 7.5kg of micronized melamine and 25kg of pentaerythritol.
An ultrathin aqueous fireproof temperature control coating comprises the following steps:
mixing chitosan with deacetylation degree of 85% and acetic acid with mass fraction of 0.5%, wherein the solid-liquid ratio is 0.015g/mL, and obtaining a mixed solution; heating the mixed solution to 45 ℃, preserving heat for 10min, dropwise adding liquid paraffin into the mixed solution, wherein the volume ratio of the mixed solution to the paraffin is 20: 1; stirring for 3h to obtain an emulsion; dropwise adding the emulsion into span80 liquid paraffin, wherein the volume ratio of the emulsion to the span80 liquid paraffin is 1: and 4, stirring for 3 hours to obtain a mixed solution. And (3) putting glutaraldehyde into the mixed solution, reacting at normal temperature for 2 hours, and drying to obtain the phase change energy storage microcapsule, wherein the solid-to-liquid ratio is 0.04 g/mL.
Pouring the acrylic copolymer emulsion into a container, and adding hollow ceramic microspheres and phase-change powder microcapsules into the acrylic copolymer emulsion under the stirring state of 200 rpm; stirring at 200rpm for 5min after the charging is finished to obtain the energy storage connection primer.
Dispersing agent, defoaming agent and amine neutralizer according to the weight ratio of 14: 1: 1 is dissolved in deionized water and stirred for 3min at 200 rpm; continuously adding titanium dioxide under the stirring state of 400rpm, and mixing according to the weight ratio of 0.3: 0.3: 1, adding ammonium polyphosphate, micronized melamine and pentaerythritol, and stirring at 800rpm for 15 min; and sequentially adding the phase-change powder microcapsules and the film-forming auxiliary agent under the stirring state of 400rpm, stirring for 5min at 400rpm, adding the fireproof emulsion, and stirring at 200rpm until the mixture is fully mixed to obtain the ultrathin water-based fireproof temperature-control coating.
Cleaning the surface to be coated, brushing an energy storage connecting primer with the thickness of 150 microns on the surface to be coated, and brushing an ultrathin water-based fireproof temperature control coating with the dry film thickness of 300 microns after 6 hours. The temperature of the coating environment is not lower than 15 ℃, the relative humidity is not higher than 80%, and the coating is dried for 7 days at normal temperature after the coating is finished, so that the ultrathin water-based fireproof temperature control coating is obtained.
Example 3
An ultra-thin water-based fireproof temperature control coating comprises an energy storage connection primer layer and an ultra-thin water-based fireproof temperature control coating;
as shown in Table 5, the energy storage connecting primer comprises the following components (in Kg) in the input amount:
TABLE 5
| Components | Content (wt.) |
| Acrylic |
80 |
| Hollow |
20 |
| Phase- |
20 |
As shown in Table 6, the ultra-thin type aqueous fire-retardant temperature-control coating comprises the following components (unit Kg) by weight:
TABLE 6
| Components | Content (wt.) | Components | Content (wt.) |
| Fire- |
20 | Titanium |
10 |
| |
20 | Intumescent flame-retardant powder | 60 |
| Mixing aid | 5 | Phase-change powder microcapsule | 15 |
| Film forming aid | 5 |
The mixing auxiliary agent comprises the following components in input amount: 3.75kg of dispersing agent, 0.625kg of defoaming agent and 0.625kg of amine neutralizing agent.
The intumescent flame-retardant powder comprises the following components in input amount: 12.5kg of ammonium polyphosphate, 12.5kg of micronized melamine and 35kg of pentaerythritol.
An ultrathin aqueous fireproof temperature control coating comprises the following steps:
mixing chitosan with deacetylation degree of 85% and acetic acid with mass fraction of 0.5%, wherein the solid-liquid ratio is 0.02g/mL, and obtaining a mixed solution; heating the mixed solution to 45 ℃, preserving heat for 15min, dropwise adding liquid paraffin into the mixed solution, wherein the volume ratio of the mixed solution to the paraffin is 22: 1; stirring for 5h to obtain an emulsion; dropwise adding the emulsion into span80 liquid paraffin, wherein the volume ratio of the emulsion to the span80 liquid paraffin is 1: 5, stirring for 4 hours to obtain a mixed solution. And (3) putting glutaraldehyde into the mixed solution, reacting for 3 hours at normal temperature with the solid-liquid ratio of 0.06g/mL, and drying to obtain the phase change energy storage microcapsule.
Pouring the acrylic copolymer emulsion into a container, and adding hollow ceramic microspheres and phase-change powder microcapsules into the acrylic copolymer emulsion under the stirring state of 400 rpm; stirring at 400rpm for 15min after the charging is finished to obtain the energy storage connection primer.
Dispersing agent, defoaming agent and amine neutralizer according to the weight ratio of 6: 1: 1 is dissolved in deionized water and stirred for 8min at 400 rpm; continuously adding titanium dioxide under the stirring state of 600rpm, and mixing according to the weight ratio of 1: 1: 2.8 adding ammonium polyphosphate, micronized melamine and pentaerythritol, and stirring at 1200rpm for 25 min; and sequentially adding the phase-change powder microcapsules and the film-forming auxiliary agent under the stirring state of 600rpm, stirring for 15min at 600rpm, adding the fireproof emulsion, and stirring at 400rpm until the mixture is fully mixed to obtain the ultrathin water-based fireproof temperature-control coating.
Cleaning the surface to be coated, brushing an energy storage connecting primer with the thickness of 100 microns on the surface to be coated, and brushing an ultrathin water-based fireproof temperature control coating with the dry film thickness of 300 microns after 12 hours. The temperature of the coating environment is not lower than 15 ℃, the relative humidity is not higher than 80%, and the coating is dried for 7 days at normal temperature after the coating is finished, so that the ultrathin water-based fireproof temperature control coating is obtained.
Example 4
Example 4 differs from example 1 in that: brushing two ultra-thin water-based fireproof temperature-control coatings with the dry film thickness of 600 microns.
Example 5
Example 5 differs from example 1 in that: and brushing three ultrathin water-based fireproof temperature-control coatings with the dry film thickness of 900 micrometers.
Comparative example
Comparative example 1
Comparative example 1 differs from example 5 in that: brushing an ultrathin water-based fireproof temperature-control coating with the dry film thickness of 250 micrometers.
Comparative example 2
Comparative example 2 differs from example 5 in that: brushing three ultrathin water-based fireproof temperature-control coatings with the dry film thickness of 1200 microns.
Comparative example 3
Comparative example 1 differs from example 5 in that: the phase change powder microcapsules in the energy storage connecting primer and the ultrathin water-based fireproof temperature control coating are respectively replaced by talcum powder with equal weight.
Comparative example 4
Comparative example 4 differs from example 5 in that: the hollow ceramic microspheres in the energy storage connecting primer are replaced by talcum powder with equal weight.
Comparative example 5
Comparative example 5 differs from example 5 in that: the ultra-thin water-based fire-retardant temperature-control coating is replaced by a commercial Zondon ultra-thin steel structure fire-retardant coating SteelMaster120SB with equal weight.
Comparative example 6
Comparative example 6 differs from example 5 in that: the energy storage connecting primer is replaced by an epoxy coating with equal weight, and the preparation method of the epoxy coating refers to the invention patent application with the publication number of CN105273577A and the patent name of the invention is the anticorrosive coating prepared by utilizing the recycled epoxy resin.
Comparative example 7
Comparative example 7 differs from comparative example 5 in that: the energy storage connection primer is replaced by an epoxy coating with equal weight.
Comparative example 8
Comparative example 8 differs from comparative example 3 in that: ammonium polyphosphate was replaced with an equal amount of dicyandiamide.
Comparative example 9
Comparative example 9 differs from comparative example 3 in that: pentaerythritol was replaced with an equal amount of starch.
Comparative example 10
Comparative example 10 differs from comparative example 3 in that: ammonium polyphosphate was replaced with an equal amount of ammonium phosphate.
Performance test
According to the national standard GB12441-2018 'finishing type fireproof paint', the ignition temperature of the storage battery is simulated, the back temperature of the storage batteries in examples 1-5 and comparative examples 1-7 is measured by a K-type thermocouple every 5 minutes, and the specific measurement results refer to FIGS. 1-3.
Referring to fig. 1, in combination with comparative example 1, example 4, example 5 and comparative example 2, the temperature of the protected surface is significantly reduced with the increase of the thickness of the ultrathin aqueous fireproof temperature-control coating, and for example 3, even if the battery is continuously burned for 40min, the temperature of the protected surface of the car body is only 321 ℃, so that the material of the car body is greatly protected from being damaged. The thickness of the 900-micron ultrathin water-based fireproof temperature-control coating can reach 5 cm after expansion, and is equivalent to the volume capable of being accommodated in a storage battery; although the temperature of the surface of the protected vehicle body can be further reduced by continuously increasing the thickness of the ultrathin water-based fireproof temperature-control coating, the coating occupies too large space after expansion, and meanwhile, the cost is increased, and the construction period of the coating is prolonged.
Referring to fig. 2, in combination with example 5 and comparative example 3, after the phase change powder microcapsules are added to the energy storage connection primer, the temperature rise is obviously stopped at the initial temperature rise stage, and the temperature rise speed of comparative example 3 without the phase change powder microcapsules is higher at the initial temperature rise stage, which shows that the phase change powder microcapsules have obvious heat absorption and cooling effects. In addition, paraffin in the phase-change powder microcapsules can be decomposed to generate a large amount of paraffin when being heated to above 160 DEG CH2O and CO2，H2O、CO2And the gas source in the expansion flame-retardant powder material synergistically acts, so that the carbon layer is efficiently expanded to become a more uniform and compact heat insulation layer, and finally the back temperature of the embodiment 5 is greatly superior to that of the comparative example 1. By combining the example 5 and the comparative example 4, the temperature rise speed of the example 5 added with the hollow ceramic microspheres is more gradual than that of the comparative example 4, and the hollow ceramic microspheres on the surface have obvious energy storage and heat insulation effects.
Referring to fig. 3, combining example 5 and comparative example 5, the fire protection performance of the commercially available zolndon ultra-thin steel structure fire retardant coating is significantly inferior to that of the ultra-thin aqueous fire retardant temperature control coating; with reference to example 5 and comparative example 6, the fire protection performance of the epoxy coating is significantly inferior to that of the energy storage connection primer; combining example 5 and comparative example 7, the temperature of the back of the battery rapidly increased due to the lack of temperature control and thermal insulation material in comparative example 7.
Referring to fig. 4, in combination with embodiments 1-3, the temperature rise difference of the back surface of the battery cell is not changed much.
Referring to fig. 5, in combination with example 5, comparative example 3 and comparative examples 8-10, the fire-retardant performance of the ultra-thin type aqueous fire-retardant temperature-control coating is slightly reduced in the absence of one of ammonium polyphosphate, micronized melamine or pentaerythritol under the condition of not containing phase-change powder microcapsules.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. An ultra-thin type waterborne fire prevention accuse temperature coating which characterized in that: comprises an energy storage connecting primer layer and at least one ultrathin water-based fireproof temperature control coating which are coated in sequence;
the energy storage connecting primer layer comprises the following components in parts by weight:
60-80 parts of acrylic copolymer emulsion;
10-20 parts of hollow ceramic microspheres;
10-20 parts of phase change powder microcapsules;
the ultrathin water-based fireproof temperature control coating comprises the following components in parts by weight:
10-20 parts of a water-based styrene-acrylate copolymer;
10-20 parts of water;
2-5 parts of a mixed auxiliary agent;
5-10 parts of titanium dioxide;
40-60 parts of expansion flame-retardant powder;
8-15 parts of phase change powder microcapsules;
2-5 parts of a film-forming assistant.
2. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the hollow ceramic microspheres are soda lime borosilicate hollow glass microspheres.
3. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the mixing auxiliary agent comprises a dispersing agent, a defoaming agent and an amine neutralizing agent in a weight ratio of 3-5: 0.5-1.5: 0.5-1.5 by mixing; the dispersant is BYK 190; the defoaming agent is BYK 024; the amine neutralizer is DMAE.
4. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the expanded flame-retardant powder material is prepared from micronized melamine, pentaerythritol and ammonium polyphosphate in a weight ratio of 1.5-2.5: 1.5-2.5: 5-7, and mixing.
5. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the core material of the phase-change powder microcapsule is paraffin.
6. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the water-based styrene-acrylate copolymer is a white emulsion with the solid content of 55 percent, the viscosity of 400-100mpa.s and the Tg value of-8 ℃.
7. The ultra-thin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the battery car as claimed in claim 1, wherein the coating comprises the following components in percentage by weight: the coating thickness of the energy storage connecting primer is 100-200 microns, and the coating thickness of the ultra-thin type water-based fireproof temperature control coating is 300-900 microns.
8. The preparation method of the ultrathin aqueous fireproof temperature-control coating as claimed in any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
adding hollow ceramic microspheres and phase change powder microcapsules into the connecting emulsion under the stirring state of 200-400 rpm; stirring at the speed of 200 plus 400rpm after the charging is finished until the materials are fully mixed to obtain the energy storage connecting primer;
dissolving the mixed assistant in a solvent, and stirring at 200-400rpm for 3-8 min; adding titanium dioxide and expanded flame-retardant powder under the stirring state of 400-; sequentially adding the phase change powder microcapsules and the film forming additive under the stirring state of 400-600rpm, and adding the fireproof emulsion after stirring for 5-15min at 400-600 rpm; stirring at 200-;
and (3) brushing an energy storage connection primer on the surface to be coated, continuously brushing the ultrathin aqueous fireproof temperature control coating, and drying at normal temperature after the ultrathin aqueous fireproof temperature control coating is coated to obtain the aqueous fireproof temperature control coating.
9. The preparation method of the ultrathin water-based fireproof temperature-control coating applied to the inner wall of the storage battery compartment of the storage battery car as claimed in claim 7, is characterized in that: the specific realization mode of brushing the ultrathin water-based fireproof temperature-control coating is as follows: brushing 1-3 paths of ultrathin aqueous fireproof temperature-control paint with the dry film thickness of 300-.
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Application publication date: 20201127 |