Fireproof coating for cable and energy storage device and preparation method of fireproof coating

Abstract

The invention belongs to the technical field of fireproof coatings, and particularly relates to a fireproof coating for cables and energy storage devices and a preparation method of the fireproof coating. The fireproof coating for the cable and the energy storage device comprises the following components in parts by weight: 50-60 parts of a polymer emulsion, 15-25 parts of a flame retardant, 10-20 parts of phosphate powder, 10-20 parts of lithium water glass powder, 50-70 parts of deionized water, 15-25 parts of a pigment filler and 1-10 parts of an auxiliary agent. After fire, the fireproof performance of the coating is improved through the synergistic effect of expansion of the polymer solution and flame retardance of the flame retardant; the lithium water glass powder and the pigment filler are added into the coating, so that the high-temperature resistance of the coating is improved, the coating is prevented from cracking at high temperature, and the high-temperature stability of the coating is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fire retardant coatings, and specifically relates to a fire retardant coating for cables and energy storage devices and a preparation method thereof. Background Art

[0002] With the development of the current economic level, the number of civil and commercial buildings is gradually increasing. At the same time, the demand for electricity is also increasing, which has brought about an increase in the number of wires and cables. However, sometimes safety accidents are often caused by fires of wires and cables, such as short circuits of cables, poor contact of cables and cables, and overload of electricity, which can cause serious economic losses.

[0003] The existing fire retardant coatings can be divided into water-soluble and solvent-based ones, and can be divided into indoor and outdoor ones in terms of application scope, and can be divided into intumescent and non-intumescent coatings in terms of fire protection form. Most of the products on the market are water-soluble solvent products, but there are few types of cable fire retardant coatings; and because the internal cable base material is easy to melt, the carbonized layer will crack, there is a risk of dripping, and it may cause the spread of fire.

[0004] In view of the above problems, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a fire retardant coating for cables and energy storage devices and a preparation method thereof, so that the coating has better fire resistance and anti-cracking performance at high temperatures.

[0006] The present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a fire retardant coating for cables and energy storage devices, comprising the following components in parts by weight:

[0008] 50-60 parts of polymer emulsion, 15-25 parts of flame retardant, 10-20 parts of phosphate powder, 10-20 parts of lithium water glass powder, 50-70 parts of deionized water, 15-25 parts of pigments and fillers, and 1-10 parts of additives.

[0009] Furthermore, in a preferred embodiment of the present invention, the above-mentioned polymer emulsion is 55 parts, the flame retardant is 20 parts, the phosphate powder is 15 parts, the lithium water glass powder is 15 parts, the deionized water is 60 parts, the color filler is 20 parts, and the additive is 3 parts.

[0010] Furthermore, in a preferred embodiment of the present invention, the polymer emulsion includes at least one of chloroform emulsion, acrylic emulsion, silicone-acrylic emulsion, tert-butyl acetate emulsion and styrene-acrylic emulsion.

[0011] Furthermore, in a preferred embodiment of the present invention, the flame retardant comprises melamine polyphosphate and a halogen-free phosphorus-based liquid flame retardant.

[0012] Furthermore, in a preferred embodiment of the present invention, the weight ratio of the melamine polyphosphate to the halogen-free phosphorus-based liquid flame retardant is 1:(1-2).

[0013] Furthermore, in a preferred embodiment of the present invention, the above-mentioned pigments and fillers include titanium dioxide, kaolin, heavy calcium and shell powder.

[0014] Furthermore, in a preferred embodiment of the present invention, the auxiliary agent includes at least one of a dispersant, a defoaming agent, a cellulose thickener, an antifreeze agent, a pH regulator, a preservative and a mildew preventer.

[0015] In a second aspect, the present invention provides a method for preparing a fire retardant coating for cables and energy storage devices, comprising the following steps:

[0016] Mix deionized water and the additive in proportion and stir thoroughly to obtain a first mixed solution;

[0017] Adding flame retardant, phosphate powder, lithium water glass powder and pigment filler into the first mixed solution in proportion, mixing and stirring thoroughly to obtain a second solution;

[0018] Add the polymer emulsion to the second solution in proportion and stir thoroughly to obtain the fire retardant coating.

[0019] Furthermore, in a preferred embodiment of the present invention, the stirring speed of the first mixed solution is 500-1000 rpm.

[0020] Furthermore, in a preferred embodiment of the present invention, the stirring speed of the second mixed solution is 1500-2000 rpm.

[0021] Compared with the prior art, the present invention has at least the following technical effects:

[0022] The fire-retardant coating for cables and energy storage devices provided by the present invention increases the fire-retardant performance of the coating through the expansion effect of the polymer solution and the synergistic effect of the flame retardant of the flame retardant when encountering fire; and because lithium water glass powder and pigments and fillers are added to the coating, the high-temperature resistance of the coating is improved, the coating is prevented from cracking at high temperatures, and the high-temperature stability of the coating is improved. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be described in detail below in conjunction with examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. The specific conditions not specified in the examples are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used without indicating the manufacturer are all conventional products that can be purchased commercially.

[0024] The overall technical idea of ​​the specific embodiment of the present invention is as follows:

[0025] In a first aspect, the present invention provides a fire retardant coating for cables and energy storage devices, comprising the following components in parts by weight:

[0026] 50-60 parts of polymer emulsion, 15-25 parts of flame retardant, 10-20 parts of phosphate powder, 10-20 parts of lithium water glass powder, 50-70 parts of deionized water, 15-25 parts of pigments and fillers, and 1-10 parts of additives.

[0027] Among them, the polymer emulsion has the functions of expansion and foaming and fire retardancy at high temperature. During the use of the cable, it has a good flame retardant effect due to its own expansion and foaming function; it is assisted by some flame retardants to further improve the flame retardant effect; lithium water glass powder is added to it, because of its own high temperature resistance and its own non-toxic, non-flammable, water-resistant and heat-resistant properties, it can improve the stability of the coating and improve the fire-resistant functionality.

[0028] In some specific embodiments, the polymer emulsion used in the present application includes at least one of chloroform emulsion, acrylic emulsion, silicone acrylic emulsion, tert-butyl acrylate emulsion and styrene acrylic emulsion.

[0029] In some specific embodiments, the polymer emulsion used in the present application is an acrylic emulsion, and the model of the acrylic emulsion is WL-180;

[0030] In some specific embodiments, the polymer emulsion used in the present application is BASF Joncryl631 styrene acrylic emulsion; in some specific embodiments, the polymer emulsion used in the present application is chloroform emulsion; in some specific embodiments, the polymer emulsion used in the present application is tert-butyl acetate emulsion;

[0031] The above-mentioned emulsions all have a certain foaming function in the fire retardant coating system. Therefore, when encountering flames at high temperatures, some emulsions can produce gas to block the inward combustion of the fire source.

[0032] Further preferably, the polymer emulsion of the present application is a chloropyrimidine emulsion, because although the structure of the chloropyrimidine emulsion contains halogen atoms, it itself has good flame retardant properties. When exposed to high temperature, part of the resin decomposes to produce hydrogen chloride gas, which has a certain foaming effect. Also, the chloropyrimidine emulsion can synergize with the flame retardant to better encapsulate the gas generated during the combustion process.

[0033] In some specific embodiments, the polymer emulsion used in the present application is 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts and 60 parts by weight;

[0034] In some specific embodiments, the flame retardant of the present application includes melamine polyphosphate and halogen-free phosphorus liquid flame retardant; in some specific embodiments, the halogen-free phosphorus liquid flame retardant model Doher-606 can be selected;

[0035] In some specific embodiments, the weight ratio of the melamine polyphosphate of the present application to the halogen-free phosphorus liquid flame retardant is 1:(1-2);

[0036] In some specific embodiments, the weight ratio of the melamine polyphosphate of the present application to the halogen-free phosphorus liquid flame retardant can be 1:1; 1:2; 1:1.5;

[0037] Melamine phosphate not only has a foaming effect, but also has excellent fire resistance. It has a better expansion flame retardant effect in the polymer emulsion in the same coating. Halogen-free phosphorus liquid flame retardant has excellent water resistance as a liquid flame retardant. Under high temperature conditions, it can increase the internal fluidity in the coating to avoid the decrease in flame retardant performance after the bubbles crack. If the weight ratio of the above flame retardants is specifically limited, the synergistic effect of the flame retardants can be better improved, thereby improving the fire resistance of the flame retardants.

[0038] In some specific embodiments, the flame retardant used in the present application is 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts or 25 parts by weight.

[0039] In some specific embodiments, the pigments and fillers of the present application include titanium dioxide, kaolin, heavy calcium and shell powder.

[0040] Because of the particle state of pigments and fillers, they can better improve the reinforcement and toughening effects of coatings. Pigments and fillers occupy a certain amount in the coating and can improve the density of the coating. However, the content of pigments and fillers cannot be too high. If the content is too high, the coating will be difficult to spread and easy to accumulate, which will increase the possibility of cracking of the coating.

[0041] In some specific embodiments, the pigment filler used in the present application is 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts or 25 parts by weight.

[0042] In some specific embodiments, the auxiliary agent of the present application includes at least one of a dispersant, a defoaming agent, a cellulose thickener, an antifreeze agent, a pH regulator, a preservative, and a mildew preventer.

[0043] In a second aspect, based on a general inventive concept, the present application provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring the mixture at a speed of 500-1000 rpm to obtain a first mixed solution;

[0044] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 1500-2000 rpm to obtain a second solution;

[0045] Add the polymer emulsion to the second solution in proportion and stir thoroughly to obtain the fire retardant coating.

[0046] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] Examples 1-6

[0048] This embodiment provides a fire retardant coating for cables and energy storage devices, wherein the coating raw material compositions of embodiments 1-6 are shown in Table 1.

[0049] Table 1

[0050]

[0051]

[0052] Example 1

[0053] The embodiment further provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring the mixture at a speed of 800 rpm to obtain a first mixed solution;

[0054] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 1800 rpm to obtain a second solution;

[0055] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0056] Example 2

[0057] The embodiment also provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring at a speed of 500 rpm to obtain a first mixed solution;

[0058] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler into the first mixed solution in proportion, mix thoroughly and stir at a speed of 2000 rpm to obtain a second solution;

[0059] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0060] Example 3

[0061] The embodiment also provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring at a speed of 1000 rpm to obtain a first mixed solution;

[0062] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 1800 rpm to obtain a second solution;

[0063] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0064] Example 4

[0065] The embodiment also provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring at a speed of 900 rpm to obtain a first mixed solution;

[0066] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 1600 rpm to obtain a second solution;

[0067] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0068] Example 5

[0069] The embodiment also provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring at a speed of 600 rpm to obtain a first mixed solution;

[0070] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 2000 rpm to obtain a second solution;

[0071] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0072] Example 6

[0073] The embodiment also provides a method for preparing a fire retardant coating, comprising the following steps: mixing deionized water and an additive in proportion and stirring at a speed of 700 rpm to obtain a first mixed solution;

[0074] Add flame retardant, phosphate powder, lithium water glass powder and pigment filler to the first mixed solution in proportion, mix thoroughly and stir at a speed of 2000 rpm to obtain a second solution;

[0075] The polymer emulsion is added to the second solution in proportion and stirred thoroughly until the fineness is ≤60 μm to obtain a fire retardant coating.

[0076] Comparative Example 1

[0077] The coating and preparation method of the comparative example are the same as those of Example 1, except that the addition amounts of melamine polyphosphate and halogen-free phosphorus-based liquid flame retardant are adjusted, wherein 20 kg of melamine polyphosphate is used in the comparative example.

[0078] Comparative Example 2

[0079] The coating and preparation method of the comparative example are the same as those of Example 1, except that the addition amounts of melamine polyphosphate and halogen-free phosphorus-based liquid flame retardant are adjusted, wherein 20 kg of halogen-free phosphorus-based liquid flame retardant is used in the comparative example.

[0080] Comparative Example 3

[0081] The coating and preparation method of the comparative example are the same as those of Example 1, except that the addition amounts of melamine polyphosphate and halogen-free phosphorus-based liquid flame retardant are adjusted, wherein the addition amounts of melamine polyphosphate and halogen-free phosphorus-based liquid flame retardant in the comparative example are 5 kg and 15 kg, respectively.

[0082] Comparative Example 4

[0083] The coating and preparation method of the comparative example are the same as those of Example 1, except that the lithium water glass powder in the coating is adjusted by replacing it with an equal amount of bentonite.

[0084] In order to illustrate that the coating provided by the present application has a better fire retardant effect, the following experiments are conducted:

[0085] The performance test of the coating was carried out using the national standard GB28374-2012. The test results are shown in Table 2 and Table 3:

[0086] Table 2

[0087]

[0088] Table 3

[0089]

[0090] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0091] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A fire retardant coating for cables and energy storage devices, characterized in that: In parts by weight, it includes the following components: 50-60 parts of polymer emulsion, 15-25 parts of flame retardant, 10-20 parts of phosphate powder, 10-20 parts of lithium water glass powder, 50-70 parts of deionized water, 15-25 parts of pigments and fillers, and 1-10 parts of additives.

2. The fire retardant coating according to claim 1, characterized in that: 55 parts of polymer emulsion, 20 parts of flame retardant, 15 parts of phosphate powder, 15 parts of lithium water glass powder, 60 parts of deionized water, 20 parts of pigments and fillers, and 3 parts of additives.

3. The fire retardant coating according to claim 2, characterized in that: The polymer emulsion includes at least one of chloroform emulsion, acrylic emulsion, silicone-acrylic emulsion, tert-butyl acrylate emulsion and styrene-acrylic emulsion.

4. The fire retardant coating according to claim 2, characterized in that: The flame retardant includes melamine polyphosphate and halogen-free phosphorus liquid flame retardant (flame retardant Doher-606).

5. The fire retardant coating according to claim 4, characterized in that: The weight ratio of the melamine polyphosphate to the halogen-free phosphorus liquid flame retardant is 1:(1-2).

6. The fire retardant coating according to claim 1, characterized in that: The pigments and fillers include titanium dioxide, kaolin, heavy calcium and shell powder.

7. The fire retardant coating according to claim 1, characterized in that: The auxiliary agent includes at least one of a dispersant, a defoamer, a cellulose thickener, an antifreeze agent, a pH regulator, a preservative and a mildew preventer.

8. The method for preparing a fire retardant coating according to any one of claims 1 to 7, characterized in that: The following steps are involved: Mix deionized water and the additive in proportion and stir thoroughly to obtain a first mixed solution; Adding flame retardant, phosphate powder, lithium water glass powder and pigment filler into the first mixed solution in proportion, mixing and stirring thoroughly to obtain a second solution; Add the polymer emulsion to the second solution in proportion and stir thoroughly to obtain the fire retardant coating.

9. The fire retardant coating according to claim 1, characterized in that: The stirring speed of the first mixed solution is 500-1000 rpm.

10. The fire retardant coating according to claim 1, characterized in that: The stirring speed of the second mixed solution is 1500-2000 rpm.

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