Frost and smoke prevention agent raw material composition as well as preparation method and application thereof

Abstract

The invention relates to the field of crop freezing injury prevention and control agents, in particular to a frost and smoke prevention agent raw material composition and a preparation method and application thereof. The frost and smoke prevention agent raw material composition comprises the following components in parts by weight: 5-15 parts of a flame retardant, 8-20 parts of a combustion improver, 12-2 parts of a smoke agent, 0.1-1 part of a surfactant, 1-5 parts of a binder, 5-15 parts of polybasic sugar alcohol and 40-60 parts of a combustible agent. By adding the polybasic sugar alcohol, not only can the safety of the frost prevention smoke agent during storage be improved, but also the duration time of smoke during use of the frost prevention smoke agent can be prolonged, and the frost prevention smoke agent has low moisture absorption rate and can be better stored.

Description

Technical Field

[0001] The present invention relates to the technical field of crop frost prevention agents, and particularly relates to a raw material composition for an anti-frost smoke agent, a preparation method thereof, and an application thereof. Background Art

[0002] Early spring frost can affect the yield of crops and cause varying degrees of damage to crops. It is one of the natural disasters affecting crops. According to the formation elements of frost, frost can be divided into radiative frost, advective frost, and mixed frost. The existing methods for dealing with frost are mainly smoking. In the earliest stage, firewood was used for smoking, but the effect was not ideal and it was prone to cause fires. Subsequently, researchers developed the use of chemical smoke agents for smoking to achieve the purpose of frost prevention. Although these smoke agents can produce a large amount of smoke, they have the defects of short smoke duration and insufficient heat. In addition, sawdust is often used as a combustible in some existing chemical smoke agents, but such combustibles are prone to absorption during storage, resulting in poor preservation. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of short smoke duration, insufficient heat, and difficult storage of the anti-frost smoke agent in the prior art, and to provide a raw material composition for an anti-frost smoke agent, a preparation method thereof, and an application thereof. The anti-frost smoke agent prepared using the raw material composition for the anti-frost smoke agent not only has the effects of long smoke duration and high heat, but is also easy to store.

[0004] The first aspect of the present invention provides a raw material composition for an anti-frost smoke agent, which, by weight, includes: 5-15 parts of a flame retardant, 8-20 parts of a combustion aid, 12-2 parts of a smoke agent, 0.1-1 part of a surfactant, 1-5 parts of a binder, 5-15 parts of a polyol, and 40-60 parts of a combustible agent.

[0005] The second aspect of the present invention provides a preparation method of the anti-frost smoke agent of the present invention, and the preparation method includes: (1) Prepare the raw material composition for the anti-frost smoke agent of the present invention; (2) Mix the combustion aid, the smoke agent, the surfactant and water to obtain a first mixture; (3) Mix the remaining raw material composition and dry it to constant weight, and then crush it to 60-120 mesh to obtain a second mixture; (4) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (5) Vacuum dry the third mixture to constant weight to obtain the product.

[0006] The third aspect of the present invention provides an application of the anti-frost smoke agent of the present invention in preventing early spring frost in forestry and fruit industry.

[0007] Compared with the prior art, the present invention has at least the following beneficial effects: (1) Adding polyhydric alcohol in the present invention can not only increase the safety of the frost-proof smoke agent during storage, but also increase the duration of the smoke when the frost-proof smoke agent is used; (2) The frost-proof smoke agent in the present invention can better increase the ambient temperature and achieve a better frost-proof effect; (3) The frost-proof smoke agent in the present invention has a low moisture absorption rate and can be better stored. Detailed Description of the Invention

[0008] The content of the present invention can be more easily understood by referring to the following detailed description of the preferred embodiments of the present invention and the included examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. When there is a contradiction, the definition in this specification shall prevail.

[0009] The first aspect of the present invention provides a raw material composition for a frost-proof smoke agent, which, by weight, includes: 5-15 parts of a flame retardant, 8-20 parts of a combustion aid, 12-2 parts of a smoke agent, 0.1-1 part of a surfactant, 1-5 parts of a binder, 5-15 parts of a polyhydric alcohol, and 40-60 parts of a combustible agent.

[0010] When preparing the frost-proof smoke agent, the raw material of the combustion aid acts as an oxidant, enabling the smoke agent to be better ignited. However, in actual use, it is found that an increase in the relative content of the combustion aid will instead lead to a decrease in the amount of smoke and a shorter duration of the smoke. The inventors of the present invention have found that adding polyhydric alcohol in the present invention can not only increase the safety of the frost-proof smoke agent during storage, but also increase the duration of the smoke when the frost-proof smoke agent is used.

[0011] In a preferred embodiment of the present invention, the raw material composition for the frost-proof smoke agent, by weight, includes: 8-12 parts of a flame retardant, 10-15 parts of a combustion aid, 16-20 parts of a smoke agent, 0.3-0.8 part of a surfactant, 1.5-2 parts of a binder, 8-12 parts of a polyhydric alcohol, and 45-50 parts of a combustible agent.

[0012] In a preferred embodiment of the present invention, the combustion aid is selected from at least one of ammonium nitrate, potassium nitrate, potassium chlorate, and potassium dichromate, and is preferably ammonium nitrate. The combustion aid has the function of an oxidant. In the present invention, the use of ammonium nitrate as the combustion aid in particular makes the smoke agent easier to ignite.

[0013] In a preferred embodiment of the present invention, the combustible agent comprises crop recycling materials and boron powder, and the mass ratio thereof is (80 - 150):1, such as 80:1, 90:1, 97:1, 112:1, 120:1, 130:1, 140:1 or 150:1, preferably (90 - 120):1.

[0014] In the present invention, the inventors have found through research that using crop recycling materials and boron powder together as the combustible agent can not only extend the combustion time, and thus extend the duration of the smoke, but also increase the released heat and enhance the frost prevention effect. The inventors speculate that under the action of the combustion improver, the crop recycling materials are ignited, and under such conditions, boron is also more easily ignited, and at the same time, the combustion of boron and the crop recycling materials is more complete. Moreover, boron has a higher calorific value, and when it burns sufficiently, more calorific value can be released, thereby better enhancing the frost prevention effect.

[0015] In a preferred embodiment of the present invention, the crop recycling materials are selected from one or more of straw, sawdust, peanut shells, corncobs, rice straw, wheat bran and tree branches and leaves, preferably sawdust.

[0016] In the present invention, in order to increase the safety during use, in a preferred embodiment of the present invention, the flame retardant is selected from one or more of graphite powder, kaolin, talc powder, diatomaceous earth and expandable graphite powder.

[0017] In a more preferred embodiment of the present invention, the flame retardant is diatomaceous earth and expandable graphite powder, and the mass ratio thereof is (5 - 15):1, such as 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11.4:1, 12:1, 13:1 or 15:1, preferably (10 - 12):1.

[0018] In the present invention, the inventors have found through research that the synergistic effect of using diatomaceous earth and expandable graphite powder can not only increase the safety of the smoke agent during use, reduce the defect of the reduction of the smoke duration caused by the binder, thereby increasing the smoke duration and enhancing the smoke particle density. The inventors speculate that a small amount of carbon layer will be generated by the expandable graphite powder, and at this time, smoke particles will rise. At the same time, diatomaceous earth has certain pores that can enable the flue gas to rise smoothly, and in an environment with heat, its rising phenomenon is more obvious, and a better frost prevention effect can be achieved; however, it is found in the research that the dosage of expandable graphite powder cannot be too much, otherwise it will affect the combustion effect.

[0019] In a more preferred embodiment of the present invention, the smoke agent is selected from ammonium chloride.

[0020] In a preferred embodiment of the present invention, the surfactant is selected from one or more of polyethylene glycol trimethyl nonyl ether, tetradecyl alcohol pentapolyoxyethylene ether, cetyl alcohol tripolyoxyethylene ether, Tween-20, polyoxyethylene lauryl ether, dodecyl trimethyl ammonium chloride, and cetyl trimethyl ammonium chloride, and is preferably Tween-20.

[0021] In a preferred embodiment of the present invention, the binder is selected from at least one of sodium alginate, sodium carboxymethyl cellulose, styrene-butadiene rubber latex, and gelatin.

[0022] In a more preferred embodiment of the present invention, the binder is a combination of sodium alginate and styrene-butadiene rubber latex, and the mass ratio thereof is (2-7):1, such as 2:1, 3:1, 4:1, 5:1, 6:1, or 7:1.

[0023] In the present invention, the model of the styrene-butadiene rubber latex is Aifulong SBR latex AL-1002 from Japan.

[0024] When the existing frost-proof smoke agent uses crop recycling materials as combustibles, there is a problem of easy moisture absorption. Compared with the prior art, the frost-proof smoke agent in the present invention has a low absorption rate during storage. The inventor speculates that the synergistic effect between sodium alginate and styrene-butadiene rubber in the present invention makes the pores of the frost-proof smoke agent prepared from the raw material composition not easily opened in humid conditions, and at the same time, the diatomaceous earth has certain pores so that the internal moisture can be timely dissipated into the air.

[0025] In a preferred embodiment of the present invention, the polyhydric alcohol is selected from one or more of xylitol, sorbitol, glucitol, sucrose, erythritol, mannitol, and maltitol, and is preferably erythritol and / or glucitol. By adopting the foregoing embodiment, the polyhydric alcohol further increases the content of smoke during the use of the frost-proof smoke agent.

[0026] In a preferred embodiment of the present invention, the raw material composition further contains azodiisobutyramidine hydrochloride.

[0027] In a more preferred embodiment of the present invention, the dosage of azodiisobutyramidine hydrochloride is 10-40 wt% of the dosage of the combustion aid, such as 10 wt%, 15 wt%, 18 wt%, 21 wt%, 27 wt%, 30 wt%, or 40 wt%, and is preferably 15-30 wt%.

[0028] In the present invention, the inventor surprisingly found that when the raw material composition of the present invention contains a specific amount of azodiisobutyramidine hydrochloride, under the action of ammonium chloride, it can increase the temperature sensitivity of azodiisobutyramidine hydrochloride, and the heat generated by its decomposition is more, which can increase the temperature of the smoke, so that the temperature in the forest orchard is maintained at a relatively high level, thereby achieving a better frost-proof effect.

[0029] The second aspect of the present invention provides a preparation method of the frost-proof smoke agent of the present invention, and the preparation method includes: (1) Prepare the raw material composition of the frost-proof smoke agent of the present invention; (2) Mix the combustion improver, the fuming agent, the surfactant and water to obtain a first mixture; (3) Mix the remaining raw material composition and dry it to a constant weight, and then crush it to 60-120 meshes to obtain a second mixture; (4) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (5) Vacuum dry the third mixture to a constant weight to obtain the product.

[0030] In the preparation method of the present invention, the amount of water used in step (1) is not particularly limited. For example, the amount of water used makes the total concentration of the combustion improver and the fuming agent in the first mixture be 0.1-0.5 g / mL.

[0031] In the preparation method of the present invention, using the wet method to prepare is more conducive to the uniformity of the raw material composition, and a frost-proof smoke agent with better frost-proof effect can be obtained.

[0032] In the preparation method of the present invention, the mixing in step (2) and step (3) can be a conventional mixing method in the art, as long as it can be mixed evenly.

[0033] In the preparation method of the present invention, the stirring in step (4) is a conventional stirring method in the art.

[0034] In the preparation method of the present invention, in step (5), the conditions for vacuum drying include: the temperature is 70-80 °C, and the vacuum degree is -0.075~-0.085 MPa. Among them, the time for vacuum drying is not particularly limited, as long as the sample is dried to a constant weight.

[0035] In the preparation method of the present invention, those skilled in the art can pack the frost-proof smoke agent of the present invention in a smoke agent paper tube, and then put the fuel wire into the smoke agent paper tube, and package and seal it to obtain a smoke agent tube containing the frost-proof smoke agent of the present invention.

[0036] The third aspect of the present invention provides the application of the frost-proof smoke agent of the present invention in preventing early spring frost in forestry and fruit industry.

[0037] In the present invention, when the frost-proof smoke agent of the present invention is used in the forestry and fruit industry, it has a large amount of smoke production, a long duration, and a large smoke weight, and can effectively prevent frost.

[0038] During use, those skilled in the art can choose how to use it according to needs. For example, 1-3 kg of anti-frost smoke agent is required per mu of land. The anti-frost smoke agent described in the present invention can effectively prevent frost: (1) Preparation before using the anti-frost smoke agent of the present invention: When the county meteorological station forecasts frost, flood the orchard once 8-12 hours in advance to increase the ground temperature; (2) Selection of the smoke release location: The frost usually occurs at 1-3 o'clock in the early morning. At this time, the ground temperature is higher than the air temperature above the tree crown, and the temperature at the foot of the mountain is higher than that at the top of the mountain. The cold air moves down along the mountain slope. The ignition point should be selected on the mountain slope. In addition, the windward side should also be selected as the smoke release location according to the wind direction; (3) Stacking of the smoke agent and auxiliary materials: Before releasing the smoke, remove the dead branches and fallen leaves around the smoke point to prevent the anti-frost smoke agent from coming into contact with other combustibles to avoid causing a fire; In key fire prevention areas or during the fire prevention period, a surface area with a diameter of 60 cm should be cleared, and a pit with a depth of more than 20 cm should be dug in the center; Place the smoke agent cylinder containing the anti-frost smoke agent of the present invention into it and ignite it; Among them, according to the terrain, 1-2 smoke release points should be selected per mu of orchard. For large orchards, a smoke release point can be set every 40-50 meters in a line; The ignition method is: Place the smoke agent cylinder vertically on the ground or in the dug pit. After igniting to produce smoke, people should leave immediately.

[0039] The present invention will be described in detail below through examples. In the following examples, the type of styrene-butadiene rubber latex is Japanese Aiyulong SBR latex AL-1002. Unless otherwise specified, other components are all commercially available products.

[0040] Example 1 Anti-frost smoke agent raw material composition: Weigh 0.8 kg of diatomaceous earth, 0.07 kg of expanded graphite powder, 1.1 kg of ammonium nitrate, 0.2 kg of azobisisobutyramidine hydrochloride, 1.63 kg of ammonium chloride, 0.05 kg of Tween-20, 0.15 kg of sodium alginate, 0.05 kg of styrene-butadiene rubber latex, 1 kg of erythritol, 4.9 kg of sawdust, and 0.05 kg of boron powder.

[0041] Preparation of the anti-frost smoke agent: (1) Mix ammonium nitrate, ammonium chloride, and Tween-20 with 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, expanded graphite powder, azobisisobutyramidine hydrochloride, sodium alginate, styrene-butadiene rubber latex, erythritol, sawdust, and boron powder, dry to constant weight, and then crush to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Under the conditions of a temperature of 72 °C and a vacuum degree of -0.085 MPa, dry the third mixture to constant weight to obtain the anti-frost smoke agent.

[0042] Industrial preparation example: According to the above preparation method, the reaction was scaled up to prepare a large amount of frost-proof smoke agent. 1 kg of the prepared frost-proof smoke agent was placed in a smoke agent paper tube, and then the fuel line was placed in the smoke agent paper tube, and multiple smoke agent tubes were obtained after packaging and sealing.

[0043] Application example of the frost-proof smoke agent: In a 5-acre apple orchard, when there was an early frost according to the weather forecast, the orchard was flooded once 2 hours in advance; a smoke release point was set at intervals of 50×50 m grid on a line, the dead branches and fallen leaves around the smoke release point were removed, and the ground surface with a diameter of 60 cm was cleared. A pit with a depth of more than 20 cm was dug in the center, and the smoke agent tube was placed vertically on the ground or in the dug pit. After igniting to produce smoke at about 1 o'clock in the second half of the night, people left immediately; after detection: in about 5 minutes, the smoke filled the apple orchard, in about 60 minutes, the temperature in the apple orchard remained at 4-5 °C, and the smoke release time was more than 2 h.

[0044] Example 2 Frost-proof smoke agent raw material composition: Weigh 1 kg of diatomaceous earth, 0.1 kg of expanded graphite powder, 1.3 kg of ammonium nitrate, 0.25 kg of azobisisobutyramidine hydrochloride, 1.85 kg of ammonium chloride, 0.05 kg of Tween-20, 0.12 kg of sodium alginate, 0.03 kg of styrene-butadiene rubber latex, 0.8 kg of erythritol, 4.46 kg of sawdust, 0.04 kg of boron powder.

[0045] Preparation of the frost-proof smoke agent: The same as Example 1.

[0046] Example 3 Frost-proof smoke agent raw material composition: Weigh 0.8 kg of diatomaceous earth, 0.08 kg of expanded graphite powder, 1 kg of ammonium nitrate, 0.27 kg of azobisisobutyramidine hydrochloride, 1.6 kg of ammonium chloride, 0.05 kg of Tween-20, 0.17 kg of sodium alginate, 0.03 kg of styrene-butadiene rubber latex, 1.1 kg of erythritol, 4.85 kg of sawdust, 0.05 kg of boron powder.

[0047] Preparation of the frost-proof smoke agent: The same as Example 1.

[0048] Example 4 Frost-proof smoke agent raw material composition: Weigh 0.88 kg of diatomaceous earth, 1 kg of ammonium nitrate, 0.27 kg of azobisisobutyramidine hydrochloride, 1.6 kg of ammonium chloride, 0.05 kg of Tween-20, 0.17 kg of sodium alginate, 0.03 kg of styrene-butadiene rubber latex, 1.1 kg of erythritol, 4.85 kg of sawdust, 0.05 kg of aluminum powder.

[0049] Preparation of the frost-proof smoke agent: (1) Mix ammonium nitrate, ammonium chloride, Tween-20 and 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, azobisisobutyramidine hydrochloride, sodium alginate, styrene-butadiene rubber latex, erythritol, sawdust, and aluminum powder, dry to constant weight, and then pulverize to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Dry the third mixture to constant weight at a temperature of 72 °C and a vacuum degree of -0.085 MPa to obtain the frost-proof smoke agent.

[0050] Example 5 Raw material composition of the frost-proof smoke agent: Weigh 0.8 kg of diatomaceous earth, 0.07 kg of expanded graphite powder, 1.1 kg of ammonium nitrate, 0.2 kg of azobisisobutyramidine hydrochloride, 1.63 kg of ammonium chloride, 0.05 kg of Tween-20, 0.2 kg of sodium alginate, 1 kg of erythritol, 4.9 kg of sawdust, and 0.05 kg of boron powder.

[0051] Preparation of the frost-proof smoke agent: (1) Mix ammonium nitrate, ammonium chloride, Tween-20 and 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, expanded graphite powder, azobisisobutyramidine hydrochloride, sodium alginate, erythritol, sawdust, and boron powder, dry to constant weight, and then pulverize to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Dry the third mixture to constant weight at a temperature of 72 °C and a vacuum degree of -0.085 MPa to obtain the frost-proof smoke agent.

[0052] Example 6 Raw material composition of the frost-proof smoke agent: Weigh 0.8 kg of diatomaceous earth, 0.07 kg of expanded graphite powder, 1.3 kg of ammonium nitrate, 1.63 kg of ammonium chloride, 0.05 kg of Tween-20, 0.15 kg of sodium alginate, 0.05 kg of styrene-butadiene rubber latex, 1 kg of erythritol, 4.9 kg of sawdust, and 0.05 kg of boron powder.

[0053] Preparation of the frost-proof smoke agent: (1) Mix ammonium nitrate, ammonium chloride, Tween-20 and 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, expanded graphite powder, sodium alginate, styrene-butadiene rubber latex, erythritol, sawdust, and boron powder, dry to constant weight, and then pulverize to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Dry the third mixture to constant weight at a temperature of 72 °C and a vacuum degree of -0.085 MPa to obtain the frost-proof smoke agent.

[0054] Example 7 Frost-preventing smoke agent raw material composition: Weigh 0.62 kg of diatomaceous earth, 0.25 kg of expanded graphite powder, 1.1 kg of ammonium nitrate, 0.2 kg of azobisisobutyramidine hydrochloride, 1.63 kg of ammonium chloride, 0.05 kg of Tween-20, 0.15 kg of sodium alginate, 0.05 kg of styrene-butadiene rubber latex, 1 kg of erythritol, 4.9 kg of sawdust, and 0.05 kg of boron powder.

[0055] Preparation of frost-preventing smoke agent: (1) Mix ammonium nitrate, ammonium chloride, and Tween-20 with 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, expanded graphite powder, azobisisobutyramidine hydrochloride, sodium alginate, styrene-butadiene rubber latex, erythritol, sawdust, and boron powder, dry to constant weight, and then pulverize to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Dry the third mixture to constant weight at a temperature of 72 °C and a vacuum degree of -0.085 MPa to obtain the frost-preventing smoke agent.

[0056] Comparative Example 1 Frost-preventing smoke agent raw material composition: Weigh 0.8 kg of diatomaceous earth, 0.07 kg of expanded graphite powder, 1.1 kg of ammonium nitrate, 0.2 kg of azobisisobutyramidine hydrochloride, 1.63 kg of ammonium chloride, 0.05 kg of Tween-20, 0.2 kg of sodium alginate, 1 kg of erythritol, 4.9 kg of sawdust, and 0.05 kg of boron powder.

[0057] Preparation of frost-preventing smoke agent: (1) Mix ammonium nitrate, ammonium chloride, and Tween-20 with 11 L of water to obtain a first mixture; (2) Mix diatomaceous earth, azobisisobutyramidine hydrochloride, sodium alginate, sawdust, and boron powder, dry to constant weight, and then pulverize to 100 mesh to obtain a second mixture; (3) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (4) Dry the third mixture to constant weight at a temperature of 72 °C and a vacuum degree of -0.085 MPa to obtain the frost-preventing smoke agent.

[0058] Performance test Conduct the following tests on the frost-preventing smoke agents prepared in the examples and comparative examples respectively: 1. Moisture absorption rate test: Place the prepared frost-preventing smoke agent in an environment with a temperature of 25 ± 2 °C and a humidity of 75 ± 2% for storage for 2 weeks. Weigh the frost-preventing smoke agent before and after storage, record the weights W1 (before storage) and W2 (after storage), and the moisture absorption rate = (W1 - W2) / W1 * 100%. The results are shown in Table 1.

[0059] 2. In an environment of 5 ± 2 °C, at 5 m 3Put 80 g of the frost-proof smoke agent into a wide-mouth bottle (1 m high), then use a match to light it to generate smoke, and record the duration of the smoke and the temperature in the wide-mouth bottle after 1 h.

[0060] The performance test results of the frost-proof smoke agents in the examples and comparative examples are shown in Table 1.

[0061] Table 1 Performance test results of the frost-proof smoke agents in the examples and comparative examples

[0062] From the test results in Table 1, it can be obtained that the frost-proof smoke agent in the present invention has a low moisture absorption rate, can be better stored, and has a long duration of smoke when in use.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raw material composition of an anti-frost smoke agent, characterized in that, By weight parts, it includes: 5-15 parts of flame retardant, 8-20 parts of combustion aid, 12-2 parts of smoke agent, 0.1-1 part of surfactant, 1-5 parts of binder, 5-15 parts of polyhydric alcohol, and 40-60 parts of combustible agent.

2. The raw material composition according to claim 1, characterized in that The combustion aid is selected from at least one of ammonium nitrate, potassium nitrate, potassium chlorate, and potassium dichromate.

3. The raw material composition according to claim 1 or 2, characterized in that The combustible agent includes crop recycling materials and boron powder, and their mass ratio is (80-150):

1.

4. The raw material composition according to claim 3, characterized in that, The crop recycling materials are selected from one or more of straw, sawdust, peanut shells, corncobs, rice straw, wheat bran, and tree branches and leaves.

5. The raw material composition according to claim 1 or 2, characterized in that, The flame retardant is selected from one or more of graphite powder, kaolin, talc powder, diatomaceous earth, and expandable graphite powder.

6. The raw material composition according to claim 1 or 2, characterized in that, The surfactant is selected from one or more of polyethylene glycol trimethyl nonyl ether, tetradecyl alcohol pentapolyoxyethylene ether, hexadecyl alcohol tripolyoxyethylene ether, Tween-20, polyoxyethylene lauryl ether, dodecyl trimethyl ammonium chloride, and cetyl trimethyl ammonium chloride.

7. The raw material composition according to claim 1 or 2, characterized in that The binder is selected from at least one of sodium alginate, sodium carboxymethyl cellulose, styrene-butadiene rubber latex, and gelatin.

8. The raw material composition according to claim 1 or 2, characterized in that, The polyhydric alcohol is selected from one or more of xylitol, sorbitol, glucitol, sucrose, erythritol, mannitol, and maltitol.

9. A preparation method of an anti-frost smoke agent, characterized in that, The preparation method includes: (1) Prepare the raw material composition of the frost-proof smoke agent according to any one of claims 1-8; (2) Mix the combustion aid, smoke agent, surfactant with water to obtain a first mixture; (3) Mix the remaining raw material composition and dry it to constant weight, then crush it to 60-120 mesh to obtain a second mixture; (4) Gradually add the first mixture to the second mixture under stirring conditions to obtain a third mixture; (5) Vacuum dry the third mixture to constant weight to obtain the product.

10. Application of the raw material composition of the frost-proof smoke agent according to any one of claims 1-8 in preventing early spring frost in forestry and fruit industry.

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