阅读说明：本技术 一种防火涂料及其制备方法和应用以及防火涂层 (Fireproof coating, preparation method and application thereof, and fireproof coating ) 是由 高常娟 于 2020-03-24 设计创作，主要内容包括：本发明公开了一种防火涂料及其制备方法和应用以及防火涂层,涉及涂料技术领域。本发明的防火涂料由如下重量份数的原料组成：炭化剂10-25份；发泡剂5-10份；脱水剂5-30份；有机溶剂20-40份,包括改性硅油、二甲苯、甲基丙烯酸甲酯中的至少一种；无机填料包括纳米级氧化锌、二氧化钛和纳米级氢氧化铝各1-10份；微球颗粒10-25份,微球颗粒由薄膜和包覆在薄膜内的被包覆物组成；其他助剂5-15份,为催化剂、分散剂、偶联剂或消泡剂中的至少一种。本发明通过微球颗粒释放可迅速气化物质,能够降低热失控区周边的温度,还能够形成蜂窝状隔热层起到阻燃作用,本发明的防火涂料,应用在汽车电池上,可避免相邻电芯或模组热失控导致整个电池包发生热反应而引发火灾的现象。(The invention discloses a fireproof coating, a preparation method and application thereof, and a fireproof coating, and relates to the technical field of coatings. The fireproof coating disclosed by the invention is composed of the following raw materials in parts by weight: 10-25 parts of a carbonizing agent; 5-10 parts of a foaming agent; 5-30 parts of a dehydrating agent; 20-40 parts of organic solvent, including at least one of modified silicone oil, xylene and methyl methacrylate; the inorganic filler comprises 1-10 parts of nano-scale zinc oxide, titanium dioxide and nano-scale aluminum hydroxide respectively; 10-25 parts of microsphere particles, wherein the microsphere particles consist of a film and a coated object coated in the film; 5-15 parts of other auxiliary agents, namely at least one of a catalyst, a dispersing agent, a coupling agent or a defoaming agent. The fireproof coating is applied to the automobile battery, and can avoid the phenomenon that the whole battery pack generates thermal reaction to cause fire because of thermal runaway of adjacent cells or modules.)

1. The fireproof coating is characterized by comprising the following raw materials in parts by weight:

10-25 parts of a carbonizing agent; 5-30 parts of a dehydrating agent; 5-10 parts of a foaming agent;

20-40 parts of an organic solvent, wherein the organic solvent comprises at least one of modified silicone oil, xylene and methyl methacrylate;

Inorganic filler, wherein the inorganic filler comprises 1-10 parts of nanoscale zinc oxide, titanium dioxide and nanoscale aluminum hydroxide respectively;

10-25 parts of microspherical particles, wherein the microspherical particles consist of a film and a coated object coated in the film;

5-15 parts of other auxiliary agents, wherein the other auxiliary agents are at least one of catalysts, dispersing agents, coupling agents or defoaming agents.

2. The fire retardant coating of claim 1, wherein said charring agent is tetrakis hydroxymethyl methane.

3. The fireproof paint according to claim 1, wherein the foaming agent is melamine salt and the dehydrating agent is ammonium polyphosphate.

4. The fireproof paint of claim 1, wherein the film melts at 90-130 ℃ and the coated object evaporates endothermically at 90-130 ℃.

5. The fire retardant coating of claim 4, wherein said object being coated is liquid water.

6. The fireproofing coating of claim 2, wherein said tetramethylolmethane dehydrates at a temperature greater than 200 ℃ to form a carbonaceous layer having a porous structure.

7. A method for preparing a fire retardant coating according to any one of claims 1 to 6, characterized in that it comprises at least the following steps:

Uniformly mixing a carbonizing agent, a foaming agent and a dehydrating agent in parts by weight of (10-25) to (5-10) to (5-30) to form mixed powder;

Providing an organic solvent solution, adding the mixed powder into the organic solvent solution, and uniformly stirring at a preset temperature to form mixed slurry;

And adding the inorganic filler, the microsphere particles and other auxiliaries into the mixed slurry in a preset weight part, and uniformly stirring again to prepare the fireproof coating.

8. The method for preparing a fire retardant coating according to claim 7, wherein in the step of providing an organic solvent solution, adding the mixed powder into the organic solvent solution, and uniformly stirring at a preset temperature to form a mixed slurry, the preset temperature is 35-120 ℃, and the stirring speed is 150-1000 r/min.

9. Use of a fire-retardant coating according to any one of claims 1 to 6 in the field of automotive batteries.

10. A fire-retardant coating, characterized in that it is formed based on the fire-retardant coating material according to any one of claims 1 to 6.

Technical Field

The invention relates to the technical field of coatings, in particular to a fireproof coating, a preparation method and application thereof and a fireproof coating.

Background

The new energy automobile replaces the traditional fuel oil automobile, which is a great trend of the automobile industry development. The small car needs a ternary lithium battery with small volume and high energy density due to the limitation of size and weight, but the anode of the battery has low pyrolysis temperature and poor thermal stability, and once the battery is combusted, the reaction is severe, the sealing performance of the battery pack is excellent, and the effect of the conventional fire-fighting fire-extinguishing measure is poor. Therefore, the battery pack with the flame-retardant and fire-extinguishing functions, which is reasonable in design, is needed, and the life and property loss caused by fire is reduced by adding the self-water-spraying fire-extinguishing device or the heat-insulating oxygen-absorbing material of the battery pack.

The prior patent discloses a two start-up spraying extinguishing device of electric automobile battery box, describes a fire extinguisher device structure and implementation and is electric power or hot melt, but does not confirm the signal source and the power source that electric power started, does not also confirm the mounted position, and to the module that keeps away from extinguishing device on fire, the fire extinguisher range probably can not effectively reach, and extinguishing device places in the battery package, increases battery package volume and quality, brings the inconvenience for the design of battery package.

In addition, a patent discloses a carbon-based composite material and a preparation method and application thereof, the patent technology uses carbon fiber as a base material to prepare carbon-based fabric, and the fabric is coated with a flame-retardant adhesive layer to support the fireproof, spontaneous combustion-proof, explosion-proof, waterproof and heat-insulating material and is applied to the aspect of battery packs. However, carbon fiber has high cost, high modification temperature, complex manufacturing process and non-energy-saving process, so that the application of the carbon fiber is limited to a certain extent.

In view of the above, there is a need to provide a fire retardant coating, a preparation method and applications thereof, and a fire retardant coating, so as to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a fireproof coating, a preparation method and application thereof, and a fireproof coating, which are used for overcoming the technical problems in the background art.

The invention is realized by the following technical scheme:

The first aspect of the invention provides a fireproof coating, which is composed of the following raw materials in parts by weight:

10-25 parts of a carbonizing agent; 5-30 parts of a dehydrating agent; 5-10 parts of a foaming agent; 20-40 parts of an organic solvent, wherein the organic solvent comprises at least one of modified silicone oil, xylene and methyl methacrylate; inorganic filler, wherein the inorganic filler comprises 1-10 parts of nanoscale zinc oxide, titanium dioxide and nanoscale aluminum hydroxide respectively; 10-25 parts of microspherical particles, wherein the microspherical particles consist of a film and a coated object coated in the film; 5-15 parts of other auxiliary agents, wherein the other auxiliary agents are at least one of catalysts, dispersing agents, coupling agents or defoaming agents.

Further, the carbonizing agent is tetramethylolmethane.

Further, the foaming agent is melamine salt, and the dehydrating agent is ammonium polyphosphate.

Further, the film melts at 90-130 ℃ and the coated object evaporates endothermically at 90-130 ℃.

Further, the object to be coated is liquid water.

Further, at a temperature higher than 200 ℃, the tetramethylolmethane dehydrates to form a carbonaceous layer having a porous structure.

The second aspect of the present invention provides a preparation method of the fire retardant coating, where the preparation method at least includes the following steps:

Uniformly mixing a carbonizing agent, a foaming agent and a dehydrating agent in parts by weight of (10-25) to (5-10) to (5-30) to form mixed powder;

Providing an organic solvent solution, adding the mixed powder into the organic solvent solution, and uniformly stirring at a preset temperature to form mixed slurry;

And adding the inorganic filler, the microsphere particles and other auxiliaries into the mixed slurry in a preset weight part, and uniformly stirring again to prepare the fireproof coating.

Further, in the step of providing an organic solvent solution, adding the mixed powder into the organic solvent solution, and uniformly stirring at a preset temperature to form a mixed slurry, the preset temperature is 35-120 ℃, and the stirring speed is 150-1000 r/min.

In a third aspect, the invention provides a use of the fireproof coating in the field of automobile batteries.

In a fourth aspect, the present invention provides a fire-retardant coating formed based on the fire-retardant coating described above.

The implementation of the invention has the following beneficial effects:

1. According to the fireproof coating, because the coated objects in the microsphere particles can absorb heat and vaporize, when the coating is heated, the substances which can be rapidly gasified are released by the microsphere particles to instantly take away the temperature, so that the temperature around a thermal runaway area can be actively reduced, and the time of the thermal runaway is delayed;

2. The coating is continuously heated, the flame-retardant material in the coating acts, under the action of the dehydrating agent and the foaming agent, the carbonizing agent is dehydrated and carbonized and interacts with a gas source under the action of airflow to form a honeycomb-shaped heat insulation layer, so that heat propagation is blocked, and the temperature rise rate and heat transfer of a thermal runaway area are delayed;

3. The fireproof coating is convenient to use, has excellent adhesion with shells of aluminum alloy base materials, iron base materials and plastic base materials, can be directly coated on a battery pack shell or a module shell or a battery cell shell, can absorb heat when a battery cell is out of control, lowers the temperature of the battery pack, lowers the temperature of the out of control battery cell, and prevents battery liquid from absorbing heat and further reacting; when the temperature continues to rise, the coating reacts to form a honeycomb-shaped heat insulation layer with a certain thickness, so that heat transfer is delayed, and the phenomenon that the fire disaster is caused by strong thermal reaction of the whole battery pack caused by thermal runaway of adjacent battery cores or modules can be avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a flowchart of a method for preparing a fire retardant coating according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.