Efficient ionic liquid antifogging master batch as well as preparation method and application thereof

Abstract

The invention relates to the field of antifogging materials, in particular to an efficient ionic liquid antifogging master batch as well as a preparation method and application thereof. The efficient ionic liquid antifogging master batch provided by the invention is prepared from the following raw materials in parts by mass: 1-10 parts of an ionic liquid antifogging agent, 1-5 parts of a dispersing agent and 80-100 parts of thermoplastic resin, wherein the preparation raw materials of the ionic liquid antifogging agent comprise an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate and an antifogging agent monoglyceryl stearate. The prepared anti-fog master batch is applied to preparation of a polypropylene film, so that the polypropylene film not only has low haze, but also has excellent anti-fog performance and relatively high glossiness, and the actual use effect is excellent.

Description

Technical Field

[0001] The present invention relates to the field of anti-fog materials, and in particular to a high-efficiency ionic liquid anti-fog masterbatch and a preparation method and application thereof. Background Art

[0002] Food packaging films are currently primarily used for modern food preservation. They require not only excellent water vapor barrier properties to prevent food from drying out due to moisture loss, but also excellent oxygen barrier properties to slow down the oxidation and spoilage of food. Optical properties are equally important, requiring high transparency so consumers can clearly see the food inside. Anti-fog properties are also a key characteristic of food packaging films, especially in refrigerated or high-humidity environments.

[0003] Polypropylene film, a common food packaging material, is widely used due to its low cost and excellent processing properties. However, traditional polypropylene film has some significant drawbacks, particularly in its anti-fog performance. Because polypropylene is inherently hydrophobic, water molecules on its surface easily condense into water droplets in high humidity environments or when subjected to frequent temperature fluctuations, resulting in surface fogging. This fog not only reduces the film's transparency, affecting consumers' visual experience, but also accelerates the growth and reproduction of microorganisms, thereby shortening the shelf life of food. In practical applications, the anti-fog problem of polypropylene film is particularly prominent. For example, in refrigerated environments, fresh foods such as fruits and vegetables release large amounts of water vapor, which condenses into water droplets on the surface of polypropylene film, causing surface fogging. Furthermore, when the ambient temperature suddenly rises from low to high temperatures, water vapor on the film's surface also rapidly condenses, causing surface fogging. The presence of this surface fog not only affects the appearance of the food but also reduces its quality, posing significant challenges to food preservation and transportation.

[0004] Currently, most polypropylene anti-fog masterbatches on the market use traditional anti-fog agents. Although they can reduce the surface tension of the material to a certain extent, causing water vapor to spread into a water film on the surface of the film, thereby preventing surface fogging, they have some obvious limitations. The anti-fog durability of traditional anti-fog agents is poor. As time goes by or environmental conditions change, the anti-fog agent is prone to failure, resulting in a rapid decline in the anti-fog effect. For example, during long-term use, the anti-fog agent may gradually evaporate or decompose due to factors such as high temperature and light, thereby losing its anti-fog effect. Secondly, the performance of traditional anti-fog masterbatches under different temperature and humidity conditions is not stable enough. For example, Chinese patent application CN109338743A discloses an anti-fog material that can effectively absorb moisture and prevent fogging at 25°C. However, in the low temperature and low humidity environment of winter, the performance of the anti-fog masterbatch will drop significantly, making it difficult to meet the needs of actual applications. Therefore, there is an urgent need to develop a new, efficient and stable anti-fog masterbatch, which is of great practical significance. Summary of the Invention

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a high-efficiency ionic liquid anti-fog masterbatch, the raw materials for its preparation, calculated by weight, include: 1-10 parts of ionic liquid anti-fog agent, 1-5 parts of dispersant, and 80-100 parts of thermoplastic resin; the raw materials for the preparation of the ionic liquid anti-fog agent include ionic liquid and anti-fog agent.

[0006] As an illustrative embodiment, the mass ratio of the ionic liquid to the antifogging agent is (1-10): (5-20).

[0007] Furthermore, the ionic liquid includes organic cations and inorganic anions.

[0008] As an implementable example, the organic cation includes an alkyl imidazolium cation.

[0009] Furthermore, the organic cation is a 1-alkyl-3-methylimidazolium cation. The 1-alkyl-3-methylimidazolium cation has a stable five-membered heterocyclic structure, wherein the alkyl carbon chain length is between C4 and C8, preferably a C4 butyl group. The butyl and methyl groups attached to the nitrogen atom impart moderate hydrophobicity and intermolecular interaction to the ionic liquid. Furthermore, the inorganic anion combined with the imidazolium cation imparts good solubility, moderate viscosity, and high thermal stability to the ionic liquid.

[0010] As an practicable example, the inorganic anion includes tetrafluoroborate (BF4 - ) or hexafluorophosphate (PF6 - ).

[0011] Furthermore, the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate.

[0012] As an implementable case, the anti-fog agent includes one or more of monoglycerol stearate, laurate or palmitate.

[0013] Furthermore, the anti-fog agent is monoglyceride stearate.

[0014] As an practicable case, the preparation method of the ionic liquid antifogging agent includes: stirring and mixing the ionic liquid and the antifogging agent, and then performing ultrasonic treatment, aging, and drying to obtain the ionic liquid antifogging agent.

[0015] Ionic liquids are a new type of green solvent and functional material. They are composed of organic cations and inorganic anions and are liquid salts at room or low temperatures. Their cations possess a certain degree of hydrophilicity, allowing them to interact with water molecules. When mixed with a thermoplastic resin, the cations in the ionic liquid gradually migrate to the resin surface. This migration process is primarily due to the interaction between the cations and the resin molecular chains, allowing the cations to reach the resin surface and adsorb there. The presence of cations significantly enhances the hydrophilicity of the thermoplastic resin surface. When water vapor contacts the resin surface, the water molecules quickly spread across the surface and form a uniform water film, rather than condensing into small droplets. The formation of this water film prevents light scattering, effectively preventing surface fogging and significantly enhancing the material's anti-fog properties. Furthermore, the introduction of ionic liquids imparts other unique properties to thermoplastic resins, such as antistatic properties. The ions in the ionic liquid neutralize static charges on the resin surface, reducing static electricity accumulation. Furthermore, the high thermal stability and low volatility of ionic liquids may enhance the performance of thermoplastic resins in high-temperature environments, reducing material degradation caused by thermal decomposition, and thus improving their thermal stability.

[0016] Traditional antifog agents have poor dispersibility in thermoplastic resin matrices and are prone to aggregation, resulting in unstable antifog performance. The addition of ionic liquids can significantly improve this problem. Ionic liquid antifog agents can make the antifog agent more evenly dispersed in the resin matrix, thereby improving the utilization efficiency and antifog effect of the antifog agent. As a result, they can form a uniform protective layer on the resin surface, further enhancing the antifog performance. In addition, the low volatility of ionic liquids allows them to serve as a "slow-release carrier" for antifog agents. During use, ionic liquids slow the migration rate of antifog agents to the surface through intermolecular forces, thereby achieving slow and continuous release of the antifog agent. This slow-release mechanism can effectively prevent the rapid depletion of the antifog agent, extend the antifog life, and maintain long-term stable antifog performance.

[0017] As an implementable case, the thermoplastic resin includes one of PP, PET or PE.

[0018] Furthermore, the thermoplastic resin is PP.

[0019] As an implementable case, the dispersant includes one or more of polyethylene wax, microcrystalline wax, calcium stearate or zinc stearate.

[0020] Furthermore, the dispersant is polyethylene wax.

[0021] In the present invention, the use of polyethylene wax as a dispersant plays a multi-faceted role. Polyethylene wax not only significantly improves the uniformity of the dispersion of the ionic liquid antifog agent in the polypropylene matrix, improving processing performance, but also enhances the antifog performance, surface quality, and mechanical properties of the final product.

[0022] The second aspect of the present invention provides a method for preparing a high-efficiency ionic liquid anti-fog masterbatch, comprising: adding an ionic liquid anti-fog agent, a dispersant and a thermoplastic resin into a twin-screw extruder, plasticizing, and extruding and granulating to obtain the anti-fog masterbatch.

[0023] Furthermore, the preparation method of the high-efficiency ionic liquid anti-fog masterbatch comprises: adding a thermoplastic resin into a twin-screw extruder by means of main feeding, adding an ionic liquid anti-fog agent and a dispersant into the twin-screw extruder by means of side feeding, melt blending at a temperature range of 200-260°C, a screw speed of 400-600 r / min, plasticizing, extruding and granulating to obtain an anti-fog masterbatch; wherein the output of the anti-fog masterbatch is 300-600 kg / h.

[0024] The third aspect of the present invention provides an application of a high-efficiency ionic liquid anti-fog masterbatch, which is applied in the production and preparation of anti-fog films.

[0025] As an implementable case, the raw materials for preparing the anti-fog film include, by weight, 90-100 parts of PP and 1-5 parts of anti-fog masterbatch.

[0026] As an implementable case, the preparation method of the anti-fog film includes: dropping PP and anti-fog masterbatch into the core layer through a loss-in-weight weighing scale, melting and filtering at 200-260°C and then extruding from a die head, casting a sheet on a cooling roller at a temperature of 20-30°C, preheating at a preheating temperature of 160°C-200°C and stretching in a stretching section, and then cooling to room temperature in a cooling section to obtain the anti-fog film.

[0027] Beneficial effects

[0028] (1) The present invention combines ionic liquid with anti-fog agent, and utilizes the excellent solubility and dispersion properties of ionic liquid on different materials to make the anti-fog agent more firmly combined with the polypropylene matrix, thereby reducing the migration and loss of the anti-fog agent, thereby achieving a long-term and stable anti-fog effect, solving the problem of rapid decline in the anti-fog effect of traditional anti-fog agents due to migration and loss during use, and significantly extending the effective service life of the anti-fog masterbatch.

[0029] (2) This invention uses ionic liquids to regulate the phase behavior and molecular motion of the system, ensuring that the antifog agent is evenly dispersed in the polypropylene matrix and can stably migrate to the material surface to exert its effect. The antifog masterbatch has more stable performance in different temperature and humidity environments, especially in extreme environments such as low temperatures and low humidity in winter, maintaining a good antifog effect, meeting the strict requirements for material stability in practical applications.

[0030] (3) The introduction of ionic liquids in this invention not only improves the anti-fog properties of thermoplastic resins but also potentially imparts other special properties to the material, such as antistatic properties, thermal stability, and improved mechanical properties. For example, the ions in the ionic liquid can neutralize the static charge of the thermoplastic resin, reducing static electricity accumulation. Simultaneously, its high thermal stability and low volatility can enhance the performance of polypropylene in high-temperature environments and reduce material degradation caused by thermal decomposition.

[0031] (4) The pre-mixing treatment scheme of the ionic liquid antifog agent in the present invention enables the ionic liquid to significantly improve the dispersibility of the antifog agent in the thermoplastic resin, making its distribution more uniform. This not only increases the utilization efficiency of the antifog agent but also ensures the consistency of antifog performance. In addition, the intermolecular forces between the ionic liquid and the antifog agent enable it to serve as a "slow-release carrier" for the antifog agent. Through intermolecular forces, it slows the migration speed of the antifog agent to the surface, achieving a slow and continuous release of the antifog agent, further enhancing the durability of the antifog effect.

[0032] (5) The anti-fog masterbatch provided by the present invention is mainly used in the field of food packaging. By improving the durability and stability of the anti-fog performance and giving the material other special properties, the anti-fog masterbatch can better meet the strict requirements of these fields, thereby expanding the application scope of polypropylene materials in high-end food packaging, fresh food preservation, agricultural greenhouses and other fields, and has important market value and application prospects. DETAILED DESCRIPTION

[0033] In the following Examples 1-3 and Comparative Examples 1-5, the compounds and related reagents used can be purchased from the market, among which the thermoplastic resin PP was purchased from Shanghai Houfeng Plastic Technology Co., Ltd. with the brand name S1003; the ionic liquid 1-butyl-3-methylimidazole tetrafluoroborate was purchased from Shanghai Yuanye Biotechnology Co., Ltd. with the brand name S43663; the ionic liquid hexadecyl imidazole hydrogen sulfate was purchased from Zhengzhou Aikemu Chemical Co., Ltd.; the antifog agent monoglyceride stearate was purchased from Shandong Xinfa Ruijie New Material Technology Co., Ltd.; the antifog agent sorbitan monooleate was purchased from Guangzhou Fufei Chemical Technology Co., Ltd. with the brand name T-80; the dispersant polyethylene wax was purchased from Hebei Gaochang Chemical Co., Ltd. with the model name PE-MAX.

[0034] Example 1

[0035] In the first aspect of this example, a high-efficiency ionic liquid anti-fog masterbatch is provided. The raw materials for its preparation are as follows, in parts by mass: 7 parts of ionic liquid anti-fog agent, 1 part of dispersant, and 92 parts of thermoplastic resin.

[0036] The raw materials for preparing the ionic liquid antifogging agent are ionic liquid and antifogging agent, and the mass ratio of ionic liquid to antifogging agent is 2:5. The preparation method of the ionic liquid antifogging agent is as follows:

[0037] S1. Dissolve the antifog agent in anhydrous ethanol to form a 10 wt% antifog solution;

[0038] S2. Place the ionic liquid in a vacuum drying oven and dry it at 80° C. for 12 hours to remove moisture and impurities;

[0039] S3, mixing 10 wt % of the anti-fog solution and the dried ionic liquid, placing the mixed solution on a magnetic stirrer, and stirring at 60° C. for 2 hours to obtain a mixed solution;

[0040] S4. Place the stirred mixed solution in an ultrasonic cleaner and perform ultrasonic treatment for 30 minutes at a power of 100 W to further promote the interaction between the ionic liquid and the antifogging agent, making the system more uniform and stable, and obtaining an ionic liquid antifogging agent; place the prepared ionic liquid antifogging agent composite system solution in a sealed container and age it at room temperature of 25° C. for 24 hours to allow the components in the system to fully interact with each other and reach a stable state;

[0041] S5. Place the prepared aged ionic liquid antifogging agent composite system solution in a vacuum drying oven at 60° C. to remove moisture and obtain a dry ionic liquid antifogging agent.

[0042] In this example, the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, the anti-fogging agent is monoglycerol stearate, the dispersant is polyethylene wax, and the thermoplastic resin is PP.

[0043] The second aspect of this example provides a method for preparing a high-efficiency ionic liquid anti-fog masterbatch, specifically: adding a thermoplastic resin to a twin-screw extruder as a main feed, adding an ionic liquid anti-fog agent and a dispersant to the twin-screw extruder as a side feed, melt blending at a temperature of 240°C, a screw speed of 500r / min, plasticizing, extrusion granulation, and obtaining an anti-fog masterbatch; wherein the output of the anti-fog masterbatch is 500kg / h.

[0044] The third aspect of this example provides an application of a high-efficiency ionic liquid anti-fog masterbatch, which is used in the production and preparation of an anti-fog film; the raw materials for the preparation of the anti-fog film are calculated by weight, specifically: 97 parts of PP and 3 parts of anti-fog masterbatch.

[0045] The preparation method of the anti-fog film is as follows: PP and anti-fog masterbatch are dropped into the core layer by weight loss weighing, melt filtered at 240°C and then extruded from the die, cast on a cooling roller at a temperature of 25°C, preheated at a preheating temperature of 200°C and stretched in a stretching section, and then cooled to room temperature of 25°C in a cooling section to obtain the anti-fog film.

[0046] Example 2

[0047] The specific implementation method of this example is the same as that of Example 1, except that the raw materials for preparing the anti-fog masterbatch are 9 parts of ionic liquid anti-fog agent, 1 part of dispersant, and 90 parts of thermoplastic resin in parts by mass; the raw materials for preparing the ionic liquid anti-fog agent are ionic liquid and anti-fog agent, and the mass ratio of ionic liquid to anti-fog agent is 2:7.

[0048] Example 3

[0049] The specific implementation method of this example is the same as that of Example 1, except that the raw materials for preparing the anti-fog masterbatch are 11 parts of ionic liquid anti-fog agent, 1 part of dispersant, and 88 parts of thermoplastic resin in parts by mass; the raw materials for preparing the ionic liquid anti-fog agent are ionic liquid and anti-fog agent, and the mass ratio of ionic liquid to anti-fog agent is 2:9.

[0050] Comparative Example 1

[0051] In the first aspect of this example, a high-efficiency ionic liquid anti-fog masterbatch is provided, wherein the raw materials for its preparation are as follows in parts by mass: 7 parts of anti-fog agent, 1 part of dispersant, and 92 parts of thermoplastic resin.

[0052] In this example, the anti-fog agent is monoglycerol stearate, which is dissolved and diluted into a 10 wt% anhydrous ethanol solution when used; the dispersant is polyethylene wax; and the thermoplastic resin is PP.

[0053] The second aspect of this example provides a method for preparing a high-efficiency ionic liquid anti-fog masterbatch, specifically: adding a thermoplastic resin to a twin-screw extruder by means of main feeding, adding an anti-fog agent and a dispersant to the twin-screw extruder by means of side feeding, melt blending at a temperature of 240°C, a screw speed of 500r / min, plasticizing, extrusion granulation, and obtaining an anti-fog masterbatch; wherein the output of the anti-fog masterbatch is 500kg / h.

[0054] The third aspect of this example provides an application of a high-efficiency ionic liquid anti-fog masterbatch, which is used in the production and preparation of an anti-fog film; the raw materials for the preparation of the anti-fog film are calculated by weight, specifically: 97 parts of PP and 3 parts of anti-fog masterbatch, and the preparation method of the anti-fog film is: PP and the anti-fog masterbatch are dropped into the core layer by a loss-in-weight scale, melt-filtered at 240°C, and then extruded from a die head, cast on a cooling roller at a temperature of 25°C, preheated at a preheating temperature of 200°C and stretched in a stretching section, and then cooled to room temperature of 25°C in a cooling section to obtain the anti-fog film.

[0055] Comparative Example 2

[0056] In the first aspect of this example, a high-efficiency ionic liquid anti-fog masterbatch is provided, the raw materials for its preparation are calculated by weight as follows: 2 parts of ionic liquid (before use, the ionic liquid is placed in a vacuum drying oven and dried at 80°C for 12 hours to remove moisture and impurities); 1 part of dispersant; 97 parts of thermoplastic resin.

[0057] In this example, the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, the dispersant is polyethylene wax, and the thermoplastic resin is PP.

[0058] The second aspect of this example provides a method for preparing a high-efficiency ionic liquid anti-fog masterbatch, specifically: adding a thermoplastic resin to a twin-screw extruder as a main feed, adding an ionic liquid and a dispersant to the twin-screw extruder as a side feed, melt blending at a temperature of 240°C, a screw speed of 500r / min, plasticizing, extrusion granulation, and obtaining an anti-fog masterbatch; wherein the output of the anti-fog masterbatch is 500kg / h.

[0059] The third aspect of this example provides an application of a high-efficiency ionic liquid anti-fog masterbatch, which is used in the production and preparation of an anti-fog film; the raw materials for the preparation of the anti-fog film are calculated by weight, specifically: 97 parts of PP and 3 parts of anti-fog masterbatch, and the preparation method of the anti-fog film is: PP and the anti-fog masterbatch are dropped into the core layer by a loss-in-weight scale, melt-filtered at 240°C, and then extruded from a die head, cast on a cooling roller at a temperature of 25°C, preheated at a preheating temperature of 200°C and stretched in a stretching section, and then cooled to room temperature of 25°C in a cooling section to obtain the anti-fog film.

[0060] Comparative Example 3

[0061] In a first aspect of this example, a high-efficiency ionic liquid anti-fog masterbatch is provided, wherein the raw materials for its preparation are, by weight, 9 parts of ionic liquid anti-fog agent and 91 parts of thermoplastic resin.

[0062] The raw materials for preparing the ionic liquid antifogging agent are ionic liquid and antifogging agent, and the mass ratio of ionic liquid to antifogging agent is 2:5. The preparation method of the ionic liquid antifogging agent is as follows:

[0063] S1. Dissolve the antifog agent in anhydrous ethanol to form a 10 wt% antifog solution;

[0064] S2. Place the ionic liquid in a vacuum drying oven and dry it at 80° C. for 12 hours to remove moisture and impurities;

[0065] S3, mixing 10 wt % of the anti-fog solution and the dried ionic liquid, placing the mixed solution on a magnetic stirrer, and stirring at 60° C. for 2 hours to obtain a mixed solution;

[0066] S4. Place the stirred mixed solution into an ultrasonic cleaner and perform ultrasonic treatment for 30 minutes at a power of 100 W to obtain an ionic liquid antifogging agent; place the prepared ionic liquid antifogging agent composite system solution into a sealed container and age it at room temperature of 25°C for 24 hours to allow the components in the system to fully interact with each other and reach a stable state.

[0067] S5. Place the prepared aged ionic liquid antifogging agent composite system solution in a vacuum drying oven at 60° C. to remove moisture and obtain a dry ionic liquid antifogging agent.

[0068] In this example, the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, the anti-fogging agent is monoglycerol stearate, and the thermoplastic resin is PP.

[0069] The second aspect of this example provides a method for preparing a high-efficiency ionic liquid anti-fog masterbatch, specifically: adding a thermoplastic resin to a twin-screw extruder as a main feed, adding an ionic liquid anti-fog agent to the twin-screw extruder as a side feed, melt blending at a temperature of 240°C, a screw speed of 500r / min, plasticizing, extrusion granulation, to obtain an anti-fog masterbatch; wherein the output of the anti-fog masterbatch is 500kg / h.

[0070] The third aspect of this example provides an application of a high-efficiency ionic liquid anti-fog masterbatch, which is used in the production and preparation of an anti-fog film; the raw materials for the preparation of the anti-fog film are calculated by weight, specifically: 97 parts of PP and 3 parts of anti-fog masterbatch, and the preparation method of the anti-fog film is: PP and the anti-fog masterbatch are dropped into the core layer by a loss-in-weight scale, melt-filtered at 240°C, and then extruded from a die head, cast on a cooling roller at a temperature of 25°C, preheated at a preheating temperature of 200°C and stretched in a stretching section, and then cooled to room temperature of 25°C in a cooling section to obtain the anti-fog film.

[0071] Comparative Example 4

[0072] The specific implementation of this example is the same as that of Example 2, except that the ionic liquid is hexadecyl imidazolium hydrogen sulfate.

[0073] Comparative Example 5

[0074] The specific implementation of this example is the same as that of Example 2, except that the anti-fog agent is sorbitan monooleate.

[0075] Performance evaluation

[0076] Test objects: anti-fog films prepared corresponding to Examples 1-3 and Comparative Examples 1-5.

[0077] Test items and test methods:

[0078] 1. Anti-fog performance level test: The anti-fog performance of polypropylene film was evaluated using the cold fog method in GB / T 31726-2015.

[0079] Evaluation criteria: 1: Completely transparent, no water droplets; 2: Good transparency, with a small amount of uneven large water droplets, and more than 50% of the area of the eye chart is completely clean as before the experiment; 3: Basically transparent, with more water droplets; 4: Semi-transparent, with many small water droplets; 5: Completely opaque.

[0080] 2. Haze test: According to the method of GB / T 2410, the haze is tested using the A-4725 transmission haze analyzer produced by BYK, Germany.

[0081] 3. Gloss test: When the measuring angle is 45°, test with A-4454 gloss tester from BYK, Germany, according to the method of ASTM D 2457-08.

[0082] 4. Moisture content test: The experiment was carried out according to GB / T 6284. The experimental results are shown in Table 1.

[0083] Table 1

[0084] Serial number Haze (%) Glossiness (GU) Moisture content (%) Anti-fog performance level Example 1 2.25 90.1 0.10 2 Example 2 2.35 92.5 0.12 1 Example 3 2.46 91.0 0.14 1 Comparative Example 1 3.55 89.5 0.16 3 Comparative Example 2 4.20 85.5 0.08 4 Comparative Example 3 3.05 91.1 0.12 2 Comparative Example 4 3.25 91.8 0.14 1 Comparative Example 5 4.68 90.6 0.15 2

[0085] From the comparison of the experimental results of Example 1 and Comparative Examples 1-3, it can be seen that when the modified and compounded ionic liquid antifog agent and dispersant are present at the same time, the prepared antifog masterbatch is used to prepare polypropylene film, and the polypropylene film has lower haze and excellent antifog performance.

[0086] From the comparison of the experimental results of Example 2, Examples 1 and 3, it can be seen that when the ionic liquid and the antifog agent exist simultaneously in the ionic liquid antifog agent and the mass ratio of the ionic liquid to the antifog agent is (1-10): (5-20), when the polypropylene antifog masterbatch is used for the polypropylene film, the antifog effect of the obtained film is excellent.

[0087] From the comparison of the experimental results of Examples 1-3 and Comparative Examples 1-2, it can be seen that when the anti-fog masterbatch prepared using the components provided in this application is used to prepare a polypropylene film, the polypropylene film not only has low haze but also has excellent anti-fog performance.

[0088] From the comparison of the experimental results of Example 2 and Comparative Examples 4-5, it can be seen that the anti-fog performance grade of the comparative ionic liquids hexadecyl imidazole hydrogen sulfate and 1-butyl-3-methylimidazolium tetrafluoroborate is 1, but 1-butyl-3-methylimidazolium tetrafluoroborate has a lower cost; compared with the anti-fog agents monoglycerol stearate and sorbitan monooleate, the polypropylene film prepared with monoglycerol stearate has lower haze and excellent anti-fog performance.

[0089] In summary, when the anti-fog masterbatch of the ionic liquid anti-fog agent system prepared in the present application is used to prepare a polypropylene film, the polypropylene film not only has low haze, but also has excellent anti-fog performance and high gloss.

Claims

1. A high-efficiency ionic liquid anti-fog masterbatch, characterized in that: The raw materials for preparation include, by weight, 1-10 parts of ionic liquid antifogging agent, 1-5 parts of dispersant, and 80-100 parts of thermoplastic resin; The raw materials for preparing the ionic liquid antifogging agent include ionic liquid and antifogging agent.

2. The high-efficiency ionic liquid anti-fog masterbatch according to claim 1, characterized in that: The mass ratio of the ionic liquid to the antifogging agent is (1-10): (5-20).

3. The high-efficiency ionic liquid anti-fog masterbatch according to claim 1, characterized in that: The ionic liquid includes organic cations and inorganic anions; The organic cation includes an alkyl imidazolium cation; The inorganic anion includes tetrafluoroborate or hexafluorophosphate.

4. The high-efficiency ionic liquid anti-fog masterbatch according to claim 1, characterized in that The anti-fog agent includes one or more of glycerol monofatty acid ester, sorbitan monooleate, laurate or palmitate.

5. The high-efficiency ionic liquid anti-fog masterbatch according to claim 1, characterized in that: The preparation method of the ionic liquid antifogging agent comprises: stirring and mixing the ionic liquid and the antifogging agent, and then subjecting the mixture to ultrasonic treatment, aging, and drying to obtain the ionic liquid antifogging agent.

6. The high-efficiency ionic liquid anti-fog masterbatch according to claim 1, characterized in that: The dispersant includes one or more of polyethylene wax, microcrystalline wax, calcium stearate or zinc stearate.

7. A method for preparing a high-efficiency ionic liquid anti-fog masterbatch according to claims 1-6, characterized in that: include: The ionic liquid anti-fog agent, dispersant and thermoplastic resin are added into a twin-screw extruder, plasticized, extruded and granulated to obtain the anti-fog masterbatch.

8. The method for preparing a high-efficiency ionic liquid anti-fog masterbatch according to claim 7, characterized in that: The preparation method of the anti-fog masterbatch comprises: Thermoplastic resin is added into a twin-screw extruder by means of main feeding, and the ionic liquid antifogging agent and dispersant are added into the twin-screw extruder by means of side feeding. The mixture is melt-blended at a temperature range of 200-260° C., the screw speed is 400-600 r / min, plasticized, extruded and granulated to obtain an antifogging masterbatch.

9. An application of the high-efficiency ionic liquid anti-fog masterbatch according to any one of claims 1 to 6, characterized in that: Used in the production and preparation of anti-fog films.

10. The use of the high-efficiency ionic liquid anti-fog masterbatch according to claim 9, characterized in that: The raw materials for preparing the anti-fog film include 90-100 parts of PP and 1-5 parts of anti-fog masterbatch in terms of mass.