CN114181585A - Water-based fireproof coating applied to motor and preparation method thereof - Google Patents

Abstract

The application relates to the technical field of coatings, in particular to a water-based fireproof coating applied to a motor and a preparation method thereof, and provides the water-based fireproof coating applied to the motor, which comprises the following components in parts by weight: 25-35 parts of epoxy/acrylic hybrid emulsion, 6-8 parts of a carbon forming agent, 4-6 parts of a foaming agent, 10-20 parts of a filler, 4-8 parts of a reversible temperature indicating material, 10-16 parts of conductive mica powder, 13.7-23.6 parts of an auxiliary agent and 5-10 parts of water. The water-based fireproof coating applied to the motor is safe and environment-friendly, has a fireproof function, can eliminate static electricity, can change color at high temperature, plays a role in an early warning function, and is beneficial to wide application.

Description

Water-based fireproof coating applied to motor and preparation method thereof

Technical Field

The application belongs to the technical field of coatings, and particularly relates to a water-based fireproof coating applied to a motor and a preparation method thereof.

Background

Various motors, electric equipment and transformers work along with strong current in the operation process, and a large amount of heat is generated. The friction of each part in the motor and the heat loss of the resistor in the coil of the turn line can release heat, so that the temperature of the motor is increased, and the motor shell is scalded. The surface coatings of the ring lines and the motor shell are oxidized and corroded at high temperature, so that the defects of yellowing, pulverization, reduced adhesive force and the like are easily caused; meanwhile, electric sparks can be generated in the motor, and if the motor coating cannot resist high temperature and fire, potential safety hazards of fire can be caused.

The fireproof paint is fireproof because the paint is a common paint film at normal temperature after forming a film, and the coating expands and carbonizes under flame or high temperature to form a nonflammable spongy carbon layer which is dozens of times thicker than the original film. The coating can isolate the heat transfer and flame retardation of an external fire source to a base material, and each component of the coating generates physical and chemical changes under the action of flame or high temperature, so that a large amount of heat energy is absorbed, a part of the heat energy is offset, and the heating process of a protected object is delayed. Meanwhile, the coating has the functions of dehydration and carbon formation reaction and fusion covering at high temperature, so that air is isolated, and the occurrence of oxidation exothermic reaction is avoided.

The fireproof coating is mostly used for engineering construction, and can also be coated on the surface of a structural material to improve the fire resistance limit of a component, but has certain disadvantages. For example, inorganic fire-proof materials based on water glass have water resistance problems; the non-expansion type fireproof coating taking the cement base as the base material has the problems of thicker coating, low bonding strength, easy shedding in the later period and the like; the organic halogen-containing flame-retardant material can decompose toxic gas when encountering fire, has certain toxicity, is easy to pollute the environment and endangers the health of human beings. At present, the national standard related to the fire-proof coating does not consider the limit of the types of toxic gases generated after the fire-proof coating meets fire and the degree of harm to human bodies.

The national safety production guidelines mention: the safety is first, and the prevention is the main. The fire-retardant coating for motors is not sufficient if it is fire-retardant. During operation of the motor, static electricity is formed. Especially in dry climatic environments, the resistance of air is high, and the motor casing coating is often insulating, so that static electricity is continuously accumulated and is difficult to eliminate, and the equipment is interfered. When the charge is accumulated too much and the voltage is too high, there is a risk of breakdown and short circuit, which may result in equipment failure and even fire. However, the coating applied to the motor at present still adopts the coating with the conventional property, and in the long-term use process, the early warning of fire alarm can not be carried out, and meanwhile, the effect of well ensuring equipment is not provided, so that certain potential safety hazard is realized.

Disclosure of Invention

An object of the application is to provide a water-based fireproof coating applied to a motor and a preparation method thereof, and aims to solve the problems that in the prior art, the coating applied to the motor cannot play a role in high-temperature color change early warning and cannot eliminate static electricity, and the motor is prone to having faults to cause fire.

In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:

in a first aspect, the present application provides an aqueous fireproof coating applied to a motor, comprising the following components in parts by weight:

in a second aspect, the present application provides a method for preparing an aqueous fireproof coating for an electric machine, comprising the following steps:

providing a raw material of a water-based fireproof coating applied to a motor;

carrying out first mixing treatment on the epoxy/acrylic acid hybrid emulsion, an auxiliary agent and water to obtain a first mixture;

and carrying out second mixing treatment on the first mixture, a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material and conductive mica powder to obtain the water-based fireproof coating applied to the motor.

According to the water-based fireproof coating applied to the motor, provided by the application in the first aspect, the fireproof coating takes epoxy/acrylic acid hybrid emulsion as a main component, and is compounded with a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material, conductive mica powder and an auxiliary agent for use, wherein the reversible temperature indicating material and the conductive mica powder have a synergistic effect, can display different colors at different temperatures, are high in accuracy and reversible in change, play a role in temperature indication warning, and have a synergistic effect with the conductive mica powder, so that static electricity generated during the operation of the motor can be eliminated, charge accumulation is avoided, potential safety hazards are eliminated, the static electricity can be eliminated in the using process of the water-based fireproof coating, the motor is prevented from being interfered, the coating can be discolored at high temperature, and an early warning function is achieved, so that the safe operation of equipment is ensured; in addition, a carbon forming agent and a foaming agent are added in a synergistic manner, and can perform a carbon forming reaction and an expansion reaction under the condition of environmental fire, so that a good foaming layer is formed, heat is isolated, and the fireproof performance is good; meanwhile, the filler is added, so that the flame-retardant material has certain heat resistance and stable performance, absorbs a large amount of heat during pyrolysis, reduces the temperature of a flame-retardant system during combustion, and can dilute and block combustible gas by water vapor and carbon dioxide released by decomposition to take away the heat of the material; therefore, the water-based fireproof coating applied to the motor has excellent performance and low VOC content, and is beneficial to wide application.

According to the preparation method of the water-based fireproof coating applied to the motor, provided by the second aspect of the application, all the components are only required to be sequentially mixed, the operation is simple and convenient, large-scale instruments and equipment are not required to be used, and the preparation method is simple and easy to operate and is beneficial to industrial application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass in the description of the embodiments of the present application may be in units of mass known in the chemical industry, such as μ g, mg, g, and kg.

The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The first aspect of the embodiment of the application provides a water-based fireproof coating applied to a motor, which comprises the following components in parts by weight:

the water-based fireproof coating applied to the motor provided by the embodiment of the application has the advantages that the fireproof coating takes epoxy/acrylic acid hybrid emulsion as a main component, and is compounded with a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material, conductive mica powder and an auxiliary agent for use, wherein the reversible temperature indicating material and the conductive mica powder have a synergistic effect, can display different colors at different temperatures, is high in accuracy and reversible in change, plays a role in temperature indication warning, and has a synergistic effect with the conductive mica powder, so that static electricity generated when the motor operates can be eliminated, charge accumulation is avoided, potential safety hazards are eliminated, static electricity can be eliminated in the using process of the water-based fireproof coating, the motor is prevented from being interfered, the coating can change color at high temperature, and an early warning function is realized to ensure the safe operation of equipment; in addition, a carbon forming agent and a foaming agent are added in a synergistic manner, and can perform a carbon forming reaction and an expansion reaction under the condition of environmental fire, so that a good foaming layer is formed, heat is isolated, and the fireproof performance is good; meanwhile, the filler is added, so that the flame-retardant material has certain heat resistance and stable performance, absorbs a large amount of heat during pyrolysis, reduces the temperature of a flame-retardant system during combustion, and can dilute and block combustible gas by water vapor and carbon dioxide released by decomposition to take away the heat of the material; therefore, the water-based fireproof coating applied to the motor has excellent performance and low VOC content, and is beneficial to wide application.

In some implementations, the water-based fireproof coating applied to the motor takes epoxy/acrylic hybrid emulsion as a main component, the provided epoxy/acrylic hybrid emulsion is prepared by adopting a hybrid emulsion polymerization process, dissolving epoxy resin in an acrylic monomer, pre-emulsifying to form micro emulsion, and then adopting an emulsion polymerization process to obtain the hybrid emulsion with excellent performance, which is different from the common simple mixing of the epoxy resin and the acrylic emulsion. The epoxy/acrylic hybrid emulsion obtained by the method of pre-emulsification-emulsion polymerization has high adhesive force to metal substrates, extremely low VOC content, and greatly improved water resistance, smoke amount and carbon layer strength.

In some embodiments, the epoxy/acrylic hybrid emulsion is prepared by dissolving epoxy resin in acrylic monomer and pre-emulsifying to form a micro emulsion in a hybrid emulsion polymerization process, wherein the pre-emulsifying treatment method comprises: adding deionized water into a proper container, dissolving an emulsifier into water, adding an acrylic acid monomer and a methacrylic acid monomer, uniformly stirring, adding epoxy resin, gradually increasing the speed by using a special emulsifying machine, increasing the speed to 2000 rpm for about 3min, and keeping the rotating speed for 10min to enable the mixed liquid in the kettle to be in a micro-emulsion state; then adopting an emulsion polymerization process, wherein the method of the emulsion polymerization process comprises the following steps: putting 1/5 pre-emulsified micro emulsion into a reaction kettle, keeping the rotation speed of 800 plus materials at 1000 rpm, adding 1/2 initiator, heating to about 70 ℃ to enable the liquid in the kettle to generate emulsion polymerization, starting to slowly dropwise add the rest emulsion after 15min, wherein the dropwise adding speed is based on the temperature stability in the kettle, adding the rest initiator after the monomer is dropwise added, heating to 95 ℃, keeping for 30min, then pumping away the unreacted monomer in vacuum, cooling, then adding organic amine to adjust the pH value of the hybrid emulsion to 8-9, and discharging to obtain the hybrid emulsion with excellent performance.

In some embodiments, the parts of the epoxy/acrylic hybrid emulsion added are selected from 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts.

Specifically, the water-based fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component, and also comprises 6-8 parts of a carbon forming agent. The carbon forming agent and an acid source in the material generate a carbon reaction at high temperature, and intramolecular dehydration is carried out to form ether bonds; the temperature is continuously raised, the phosphoric ester bond is almost completely broken through carbonization reaction to form an unsaturated carbon-rich structure, a nonflammable three-dimensional space structure is formed, a material base serving as a foam carbonization layer is obtained, the foam carbonization layer plays a skeleton role, heat is effectively isolated, and the fireproof performance is good.

In some embodiments, the carbon forming agent comprises one or more of sorbitol, pentaerythritol, dipentaerythritol, tripentaerythritol, triethanolamine, ammonium polyphosphate, melamine polyphosphate, triazine derivatives.

In some embodiments, the char-forming agent is selected from the group consisting of TF100 flame retardant char-forming agents of santelli chemical ltd, nj, and is a polyol polymer containing a triazine ring structure.

In some embodiments, the carbon forming agent is added in a part selected from 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts.

Specifically, the water-based fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component, and further comprises 4-6 parts of foaming agent. The foaming agent releases NH when decomposed by heat₃、CO₂、H₂The incombustible gas such as O and the like cooperates with the carbon forming agent to form a spongy carbon layer which plays a certain role in heat insulation.

In some embodiments, the blowing agent comprises one or more of dicyandiamide, melamine, polyamide, melamine, polyurea, chlorinated paraffin.

In some embodiments, the blowing agent is selected from the premium dicyandiamide of Ningxia peaking chemical Co.

In some embodiments, the blowing agent is selected from dicyandiamide as the blowing agent. Dicyandiamide is selected as a foaming agent because the difference of the decomposition temperatures of dehydration catalysts guanidine phosphate urea and dicyandiamide is small, namely 191 ℃ and 210 ℃. If the decomposition temperature of the foaming agent is too low than that of the dehydration catalyst, gas generated by decomposition escapes before the coating is carbonized, and the foaming effect cannot be realized; on the contrary, the gas generated by decomposition will push off the formed carbonized layer, and a good foamed layer cannot be formed.

In some embodiments, the additional parts of blowing agent are selected from 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts.

Specifically, the water-based fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component and further comprises 10-20 parts of filler. In some embodiments, the filler comprises one or more of aluminum hydroxide, magnesium hydroxide, hydrated zinc borate. The provided filler has good fireproof and flame-retardant effects, can be heated and decomposed at high temperature, absorbs a large amount of heat, can reduce the temperature of a flame-retardant system during combustion, and can dilute and block combustible gas by water vapor or carbon dioxide released by decomposition; the volatilization of the water vapor can take away the heat of the material and reduce the temperature of the material; the alkaline composite metal compound which is porous and has a large specific surface area is formed after high-temperature decomposition, can adsorb harmful gases, particularly acid gases, generated by the combustion of the coating, and can adsorb and agglomerate small particles of carbon, thereby playing a role in inhibiting smoke. The chemical substances after decomposition have good stability, insulate heat and isolate air, and interrupt the continuous combustion.

In some embodiments, the added parts are selected from 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts.

In some embodiments, the filler is selected from LDH double metal hydroxides (magnesium aluminum hydroxides) from environmental friendly materials ltd, foshan day.

The water-based fireproof coating applied to the motor comprises 4-8 parts of reversible temperature indicating materials on the basis that epoxy/acrylic acid hybrid emulsion is used as a main component, wherein the reversible temperature indicating materials can display different colors at different temperatures, are high in accuracy and reversible in change, and play a role in temperature indication warning.

In some embodiments, the reversible temperature indicating material comprises Cu₂HgI₄、CoI₂·2C₆H₁₂N₄·10H₂O、PbCrO₄、HgI₂One or more of them. The materials are added into the paint, so that different colors can be repeatedly displayed at different temperatures, the precision is high, the change is reversible, and when the temperature is reduced again, the color can be restored. The color change temperature of the above materials is 50-137 deg.CThe actual situation is matched with a proper temperature indicating material.

In one embodiment, the reversible temperature indicating material is selected from Cu₂HgI₄It is a red powdery substance, has a tetragonal crystal structure at normal temperature, and has a red appearance. When heated to above 71 deg.C, the structure will transform into cubic system, and the appearance will be brownish black.

In one embodiment, the reversible temperature indicating material is selected from CoI₂·2C₆H₁₂N₄·10H₂O, a metal salt complex, is pink at ambient temperature and begins to turn green over at temperatures above 50 ℃.

In one embodiment, the reversible temperature indicating material is selected from PbCrO₄The color change temperature is about 100 ℃. With increasing temperature and CrO₄ ^2-Has an increased oxidizing ability with Pb²⁺Oxidation-reduction reaction takes place to form Pb⁴⁺The color was red. The higher the temperature, the more Pb formed⁴⁺The more, the darker the color, gradually changing from light yellow to dark red.

In one embodiment, the reversible thermochromic material is selected from the group consisting of HgI₂The typical expression of crystal form transformation excitation is that the crystal form is in a red cube crystal form structure at the temperature of lower than 137 ℃, and the crystal form is changed into a blue orthorhombic crystal form at the temperature of higher than 137 ℃.

In some embodiments, the reversible temperature indicating material is selected from Cu₂HgI₄The color change temperature is 70 ℃ and is slightly higher than the normal temperature of the motor, which is beneficial to providing better indication function for the temperature of the motor.

Specifically, the waterborne fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component, and also comprises 10-16 parts of conductive mica powder. The provided conductive mica powder takes wet white mica as a substrate, the wet white mica powder is ground to a nanometer level by fine grinding equipment, the surface area of the conductive mica powder is far larger than that of common powder, then a proper amount of titanate coupling agent solution and nanometer conductive graphite are slowly added under the condition of stirring, the mixture is subjected to ultrasonic treatment after being uniformly stirred, the conductive graphite and the mica powder can be well combined to form a semiconductor coating, and a system is dried to prepare the novel electronic conductive functional semiconductor filler.

In some embodiments, the added parts of the conductive mica powder are selected from 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts and 16 parts.

In some embodiments, the conductive mica powder is selected from 1500 mesh conductive mica powder from baifeng mineral products processing ltd, lingshou county.

Specifically, the waterborne fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component, and further comprises 13.7-23.6 parts of an auxiliary agent.

In some embodiments, the adjuvant comprises the following components in parts by weight:

in some embodiments, the coalescent includes one or more of dipropylene glycol butyl ether, alcohol ester twelve, dipropylene glycol methyl ether, and propylene glycol butyl ether, which provide coalescents that facilitate rapid film formation of the coating.

In some embodiments, the dispersant is selected from nonionic block polymers consisting of hydrophilic polyether segments and multi-electron hydrophobic components, and the dispersant containing the amphiphilic components can have affinity to various interfaces and can be strongly adsorbed on the surfaces of the pigment and the filler, so that the pigment wetting and dispersing performance is shown, and the inorganic filler has good wetting and dispersing performance on the surface.

In some embodiments, the crosslinking agent is selected from blocked isocyanates; the blocked isocyanate is a compound which is made by a hydrophilic modified isocyanate cross-linking agent through blocking active groups with a blocking agent and is insensitive to water, the deblocking temperature is 60-80 ℃, when the temperature is higher than 60 ℃, the active groups begin to be deblocked and react with hydroxyl groups of main resin to complete cross-linking, and the product is non-toxic, odorless, non-flammable and good in stability at normal temperature, and the compounded waterborne fireproof coating applied to the motor has low VOC content.

In some embodiments, the catalyst is selected from guanidine urea phosphate, which is an acidic compound capable of decomposing at 191 ℃ to generate dehydration, and the guanidine urea phosphate can promote the decomposition of the coating by heat after the temperature is higher than 191 ℃ to remove the moisture of the carbon forming agent in the coating and form a nonflammable carbonized layer with high heat preservation effect. The processing performance and the foaming performance are better.

In some embodiments, the wetting agent is selected from the group consisting of silicone bis-surfactants, which can improve the wetting, anti-cratering and low foam stability properties of the substrate, and also has flow-promoting, low foam properties.

In some embodiments, the thickener is selected from polyether polyurethane associated aqueous rheology aids, and the addition of the thickener is beneficial in improving the sag resistance and workability of the coating.

In some embodiments, the defoamer is selected from polyether siloxane copolymer based defoamers that provide defoamer to prevent foaming of the emulsion.

In some embodiments, the emulsifier is selected from dimethylethanolamine.

Specifically, the water-based fireproof coating applied to the motor takes epoxy/acrylic acid hybrid emulsion as a main component and also comprises 5-10 parts of water.

The second aspect of the embodiments of the present application provides a method for preparing a water-based fireproof coating applied to a motor, including the following steps:

s01, providing a raw material of the water-based fireproof coating applied to the motor;

s02, carrying out first mixing treatment on the epoxy/acrylic acid hybrid emulsion, an auxiliary agent and water to obtain a first mixture;

and S03, carrying out second mixing treatment on the first mixture, a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material and conductive mica powder to obtain the water-based fireproof coating applied to the motor.

According to the preparation method of the water-based fireproof coating applied to the motor, provided by the embodiment of the application, the preparation method only needs to sequentially mix and treat all the components, is simple and convenient to operate, does not need large-scale instruments and equipment, is simple and easy to operate, and is beneficial to industrial application.

Step S01, providing raw materials of the water-based fireproof paint applied to the motor, wherein the selection of the raw materials and the addition of the components are as discussed above, and are not repeated herein for brevity.

Step S02, performing first mixing treatment on the epoxy/acrylic acid hybrid emulsion, the auxiliary agent and water to obtain a first mixture.

In some embodiments, the adjuvants include film forming aids, dispersants, cross-linking agents, catalysts, wetting agents, thickeners, defoamers, emulsifiers, and the first mixing process includes the steps of:

and putting the epoxy/acrylic acid hybrid emulsion into a container, carrying out dispersion stirring at the rotating speed of 400-600r/min, sequentially adding deionized water, an emulsifier, a defoaming agent, a film-forming assistant and a dispersing agent in the stirring process, wherein the interval is 2-3min after each material is added, continuing stirring for 5min after the addition is finished, then adding a crosslinking agent, and continuing stirring for 5min after the addition is finished to obtain a first mixture.

And step S03, carrying out second mixing treatment on the first mixture, a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material and conductive mica powder to obtain the water-based fireproof coating applied to the motor.

In some embodiments, the method comprises: the rotating speed is increased to 800-; and reducing the rotating speed to 800r/min, sequentially adding a wetting agent, adjusting the viscosity to be proper by using a thickening agent, and stirring for 10-15 min after the addition is finished to obtain the water-based fireproof coating applied to the motor.

The following description will be given with reference to specific examples.

Example 1

Water-based fireproof coating applied to motor and preparation method thereof

The raw materials and the addition amounts of the aqueous fire retardant coating applied to the motor are shown in example 1 in table 1.

The preparation method comprises the following steps: (1) the raw material proportion provided by the embodiment 1 is adopted;

(2) putting the epoxy/acrylic acid hybrid emulsion into a container, carrying out dispersion stirring at the rotating speed of 400-600r/min, sequentially adding deionized water, an emulsifier, a defoaming agent, a film-forming assistant and a dispersing agent in the stirring process, wherein the interval is 2-3min after each material is added, continuously stirring for 5min after the addition is finished, then adding a cross-linking agent, and continuously stirring for 5min after the addition is finished;

(3) the rotating speed is increased to 800-. And finally, reducing the rotating speed to 600-800r/min, sequentially adding a base material wetting agent, finally adjusting the viscosity to be proper by using a thickening agent, and stirring for 10min after the addition is finished to obtain the water-based fireproof coating applied to the motor.

Example 2

Water-based fireproof coating applied to motor and preparation method thereof

The raw materials and the addition amounts of the water-based fireproof paint applied to the motor are shown in example 2 in table 1.

The preparation method was identical to that provided in example 1.

Example 3

Water-based fireproof coating applied to motor and preparation method thereof

The raw materials and the addition amounts of the water-based fireproof paint applied to the motor are shown in example 3 in table 1.

The preparation method was identical to that provided in example 1.

Comparative example 1

Water-based paint and preparation method thereof

The raw materials and the addition amount of the water-based fireproof paint applied to the motor are shown in comparative example 1 in table 1.

The preparation method was identical to that provided in example 1.

TABLE 1

Property testing and results analysis

The coatings obtained in examples 1 to 3 and comparative example 1 were coated on the surface of a motor, and baked at 120 ℃ for 20min, and the basic performance of each example was tested, and the coating was tested for fire resistance by a vertical combustion method and a cone calorimeter method, as shown in table 2, it can be seen that the surface resistivity of the static conductive coating specified in the national standard was 10⁵-10¹¹In the range of Ω, the surface resistivity of each example coating layer meets the standard of static conductive paint, while the surface resistivity of comparative example 1 is greater than the standard, belongs to an insulating coating layer, and cannot conduct static electricity. The coatings of the examples can start to generate more obvious color change at the temperature of more than 70 ℃, the color change is reversible, the coatings can return to the original color after the temperature is reduced, the coatings can play a role in warning the conditions of overload and large heat productivity of the motor, and the coatings of the comparative example 1 do not have the characteristic of being subjected to thermal discoloration. The coatings of each example have better mechanical properties and resistance, and have longer ignition times and shorter flame-out times, good flame retardancy and self-extinguishment; in contrast, comparative example 1 had a short ignition time and a long duration of combustion after the ignition source was removed, and had no flame retardancy and self-extinguishing property.

TABLE 2

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The water-based fireproof coating applied to the motor is characterized by comprising the following components in parts by weight:

2. the aqueous fireproof paint for motors of claim 1, wherein the carbon forming agent comprises one or more of sorbitol, pentaerythritol, dipentaerythritol, tripentaerythritol, and triethanolamine.

3. The aqueous fire retardant coating applied to an electric machine according to claim 1, wherein the foaming agent comprises one or more of dicyandiamide, melamine, polyamide, melamine, polyurea, chlorinated paraffin.

4. The aqueous fireproof paint for electric machines according to claim 1, wherein the filler comprises one or more of aluminum hydroxide, magnesium hydroxide and hydrated zinc borate.

5. The aqueous fire retardant coating for electric machine application according to claim 1, wherein the reversible temperature indicating material comprises Cu₂HgI₄、CoI₂·2C₆H₁₂N₄·10H₂O、PbCrO₄、HgI₂One or more of them.

6. The water-based fireproof coating applied to the motor as claimed in any one of claims 1 to 5, wherein the auxiliary agent comprises the following components in parts by weight:

7. the aqueous fireproof paint for motor applications according to claim 6, wherein the film forming aid comprises one or more of dipropylene glycol butyl ether, alcohol ester dodecamethylene, dipropylene glycol methyl ether, and propylene glycol butyl ether; and/or the presence of a gas in the gas,

the dispersant is selected from nonionic block polymers consisting of hydrophilic polyether chain segments and multi-electron hydrophobic components; and/or the presence of a gas in the gas,

the cross-linking agent is selected from blocked isocyanate; and/or the presence of a gas in the gas,

the catalyst is selected from guanidine phosphate urea.

8. The aqueous fire retardant coating for electric machines according to claim 6 wherein the wetting agent is selected from the group consisting of siloxane bis-surfactants; and/or the presence of a gas in the gas,

the thickening agent is selected from polyether polyurethane associated aqueous rheological additives; and/or the presence of a gas in the gas,

the defoaming agent is selected from polyether siloxane copolymer defoaming agents; and/or the presence of a gas in the gas,

the emulsifier is selected from dimethylethanolamine.

9. The preparation method of the water-based fireproof coating applied to the motor, disclosed by any one of claims 1 to 8, is characterized by comprising the following steps of:

providing raw materials of the water-based fireproof coating applied to the motor;

carrying out first mixing treatment on the epoxy/acrylic acid hybrid emulsion, an auxiliary agent and water to obtain a first mixture;

and carrying out second mixing treatment on the first mixture, a carbon forming agent, a foaming agent, a filler, a reversible temperature indicating material and conductive mica powder to obtain the water-based fireproof coating applied to the motor.

10. The production method according to claim 9, wherein the conditions of the second mixing treatment are: mixing for 20-30 minutes under the condition of 800-.