High-efficiency ionic liquid anti-fog masterbatch, preparation method and application thereof

Abstract

The present application relates to the field of anti-fog materials, in particular to a kind of high-efficiency ionic liquid anti-fog masterbatch and its preparation method and application.The high-efficiency ionic liquid anti-fog masterbatch provided by the present application is prepared from raw materials including 1-10 parts of ionic liquid anti-fog agent, 1-5 parts of dispersing agent and 80-100 parts of thermoplastic resin, by mass fraction.The raw materials for preparing the ionic liquid anti-fog agent include ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate and anti-fog agent monoglyceride stearate.The anti-fog masterbatch prepared by the present application can be used in the preparation of polypropylene film, so that the polypropylene film not only has low haze, but also has excellent anti-fog performance and high gloss, and the actual use effect is excellent.

Description

TECHNICAL FIELD

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

[0002] Food packaging films are currently mainly used for modern food preservation. They not only need to have good water vapor barrier properties to prevent food from drying out due to water loss, but also need to have excellent oxygen barrier properties to slow down the oxidation and deterioration process of food. In addition, optical properties are also important, and the packaging film is required to have high transparency so that consumers can clearly see the food inside the packaging; anti-fog performance is also a key feature of food packaging films, especially in cold storage or high humidity environments.

[0003] Polypropylene film is a commonly used food packaging material due to its low cost and good processing performance. However, traditional polypropylene film has some obvious defects, especially in terms of anti-fog performance. Since polypropylene is a hydrophobic material, water molecules on its surface can easily condense into water droplets under high humidity conditions or frequent temperature changes, causing the surface to fog. This fog not only reduces the transparency of the film, affecting the visual experience of consumers, 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 a cold storage environment, fresh fruits and vegetables release a large amount of water vapor, which condenses into water droplets on the surface of the polypropylene film, causing the surface to fog. In addition, when the environmental temperature suddenly rises from low to high, the water vapor on the surface of the film will also quickly condense, causing the surface to fog. The presence of this surface fog layer not only affects the appearance of the food, but also reduces the quality of the food, posing a great challenge to food preservation and transportation.

[0004] Most of the polypropylene anti-fog masterbatch on the market uses traditional anti-fog agents, which can reduce the surface tension of the material to some extent, allowing water vapor to spread on the film surface as a water film, thereby preventing the surface from fogging. However, they have some obvious limitations. The anti-fog durability of traditional anti-fog agents is poor, and they can easily fail over time or under changing environmental conditions, leading to rapid decline in anti-fog effect. For example, during long-term use, the anti-fog agent may gradually volatilize or decompose due to high temperature, light, etc., thereby losing its anti-fog effect. Secondly, the performance of traditional anti-fog masterbatch is not stable under different temperature and humidity conditions. For example, Chinese patent application CN109338743A discloses an anti-fog material that can effectively absorb moisture and prevent fogging at 25℃. However, its performance will decrease significantly in low-temperature and low-humidity environments in winter, making it difficult to meet the needs of actual applications. Therefore, there is an urgent need to develop a new type of high-efficiency and stable anti-fog masterbatch, which has important practical significance. SUMMARY

[0005] To solve the above technical problems, the present application provides a high-efficiency ionic liquid anti-fogging masterbatch, which is prepared from the following raw materials in parts by mass: 1-10 parts of ionic liquid anti-fogging agent, 1-5 parts of dispersant, and 80-100 parts of thermoplastic resin; the ionic liquid anti-fogging agent is prepared from ionic liquid and anti-fogging agent.

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

[0007] Further, the ionic liquid comprises organic cation and inorganic anion.

[0008] As an example, the organic cation comprises alkyl imidazole cation.

[0009] Further, the organic cation is 1-alkyl-3-methyl imidazole cation. The 1-alkyl-3-methyl imidazole cation has stable five-membered heterocyclic structure, wherein the alkyl carbon chain length is between C4-C8, preferably C4 butyl, and the butyl and methyl connected to the nitrogen atom endow the ionic liquid with moderate hydrophobicity and intermolecular interaction ability, in addition, the inorganic anion is combined with the imidazole cation, so that the ionic liquid has good solubility, moderate viscosity and high thermal stability.

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

[0011] Further, the ionic liquid is 1-butyl-3-methyl imidazole tetrafluoroborate.

[0012] As an example, the anti-fogging agent comprises one or more of monoglyceride stearate, laurate or palmitate.

[0013] Further, the anti-fogging agent is monoglyceride stearate.

[0014] As an example, the preparation method of the ionic liquid anti-fogging agent comprises: stirring and uniformly mixing the ionic liquid and the anti-fogging agent, and then performing ultrasonic treatment, aging and drying treatment to obtain the ionic liquid anti-fogging agent.

[0015] Ionic liquid is a new type of green solvent and functional material, which is composed of organic cations and inorganic anions. It is a kind of salt that is in liquid state at room temperature or low temperature. The cation part of ionic liquid has certain hydrophilicity and can interact with water molecules. When ionic liquid is mixed with thermoplastic resin, the cations in ionic liquid will gradually migrate to the surface of the resin. The migration process is mainly due to the interaction between cations and resin molecular chains, so that the cations can reach the surface of the resin and be adsorbed on it. The presence of cations significantly improves the hydrophilicity of the surface of thermoplastic resin, so that when water vapor contacts the surface of the resin product, water molecules can quickly spread on the surface and form a uniform water film, instead of condensing into small droplets. The formation of water film avoids the scattering of light, thereby effectively preventing the surface from fogging and significantly improving the anti-fogging performance of the material. In addition, the introduction of ionic liquid also endows thermoplastic resin with other special properties, such as antistatic property. The ions in ionic liquid can neutralize the static charge on the surface of the resin, reducing the accumulation of static electricity. At the same time, the high thermal stability and low volatility of ionic liquid can enhance the performance of thermoplastic resin in high temperature environment, reduce the aging of the material caused by thermal decomposition, and thus improve its thermal stability.

[0016] The dispersion of traditional anti-fogging agent in thermoplastic resin matrix is poor and easy to aggregate, resulting in unstable anti-fogging performance. The addition of ionic liquid can significantly improve this problem. Ionic liquid anti-fogging agent can make the dispersion of anti-fogging agent in resin matrix more uniform, thereby improving the utilization efficiency and anti-fogging effect of anti-fogging agent, so as to form a uniform protective layer on the surface of the resin, further enhancing the anti-fogging performance. In addition, the low volatility of ionic liquid makes it can be used as a "sustained release carrier" for anti-fogging agent. During use, ionic liquid delays the migration speed of anti-fogging agent to the surface through intermolecular forces, thereby achieving slow and continuous release of anti-fogging agent. The sustained release mechanism can effectively avoid the rapid depletion of anti-fogging agent, prolong the anti-fogging life and maintain long-term stable anti-fogging performance.

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

[0018] Further, 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] Further, the dispersant is polyethylene wax.

[0021] In the present application, polyethylene wax is selected as the dispersant, which has important functions in many aspects. Polyethylene wax not only can significantly improve the dispersion uniformity of ionic liquid anti-fogging agent in polypropylene matrix, improve the processing performance, but also can improve the anti-fogging performance, surface quality and mechanical properties of the final product.

[0022] The second aspect of the present application provides a preparation method of the high-efficiency ionic liquid anti-fog master batch, comprising: adding the ionic liquid anti-fog agent, the dispersing agent and the thermoplastic resin into a double-screw extruder, plasticizing, extruding and granulating to obtain the anti-fog master batch.

[0023] Further, the preparation method of the high-efficiency ionic liquid anti-fog master batch comprises: adding the thermoplastic resin into the double-screw extruder by the main feeding mode, adding the ionic liquid anti-fog agent and the dispersing agent into the double-screw extruder by the side feeding mode, melt blending at a temperature range of 200-260℃, plasticizing, extruding and granulating at a screw rotation speed of 400-600r / min to obtain the anti-fog master batch; wherein the yield of the anti-fog master batch is 300-600kg / h.

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

[0025] As an implementable case, the preparation raw material of the anti-fog film comprises: 90-100 parts of PP and 1-5 parts of the anti-fog master batch according to the mass fraction.

[0026] As an implementable case, the preparation method of the anti-fog film comprises: dropping the PP and the anti-fog master batch into the core layer by the loss weight scale, extruding from the die after melt filtering at 200-260℃, casting on the cooling roller at a temperature of 20-30℃, stretching after preheating at a preheating temperature of 160℃-200℃ and stretching in the stretching section, and cooling to room temperature in the cooling section to obtain the anti-fog film.

[0027] Beneficial effects

[0028] (I) The present application combines the ionic liquid with the anti-fog agent, uses the excellent dissolving and dispersing performance of the ionic liquid on different materials to make the anti-fog agent more firmly combined in the polypropylene matrix, reduces the migration and loss of the anti-fog agent, thereby realizing the long-term stable anti-fog effect, solving the problem of rapid decline of the anti-fog effect of the traditional anti-fog agent in the use process due to the migration and loss, and significantly prolonging the effective service life of the anti-fog master batch.

[0029] (II) The present application adjusts the phase behavior and molecular motion of the system by the ionic liquid to ensure that the anti-fog agent is uniformly dispersed in the polypropylene matrix and can stably migrate to the material surface to play a role. The performance of the anti-fog master batch in different temperature and humidity environments is more stable, especially in the extreme environment of low temperature and low humidity in winter, which can still maintain good anti-fog effect, meeting the strict requirements of the material stability in actual application.

[0030] (Three) The introduction of ionic liquid in the present application not only improves the anti-fogging performance of thermoplastic resin, but also can endow the material with other special properties, such as anti-static property, thermal stability and mechanical property improvement. For example, the ions in the ionic liquid can neutralize the static charge of the thermoplastic resin, reduce the accumulation of static electricity, while its high thermal stability and low volatility can enhance the performance of polypropylene in high temperature environment, reduce the material aging caused by thermal decomposition.

[0031] (Four) The pre-mixing treatment scheme of ionic liquid anti-fogging agent in the present application can significantly improve the dispersibility of anti-fogging agent in thermoplastic resin, making it more uniform, not only improving the utilization efficiency of anti-fogging agent, but also ensuring the consistency of anti-fogging performance. In addition, the intermolecular force between ionic liquid and anti-fogging agent makes it can be used as a "sustained release carrier" of anti-fogging agent, which can delay the migration speed of anti-fogging agent to the surface through intermolecular force, realize the slow and continuous release of anti-fogging agent, and further enhance the durability of anti-fogging effect.

[0032] (Five) The anti-fogging masterbatch provided by the present application is mainly applied in food packaging field. By improving the durability and stability of anti-fogging performance, and endowing the material with other special properties, the anti-fogging masterbatch can better meet the strict requirements of these fields, thereby expanding the application range of polypropylene material in high-end food packaging, fresh-keeping, agricultural greenhouse and other fields, and has important market value and application prospect. DETAILED DESCRIPTION

[0033] In the following Examples 1-3 and Comparative Examples 1-5, the compounds and related reagents used are commercially available. The thermoplastic resin PP is purchased from Shanghai Hougeng Plastic Co., Ltd., with the brand S1003; the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate is purchased from Shanghai Yuan Ye Biological Technology Co., Ltd., with the brand S43663; the ionic liquid hexadecyl imidazole hydrogen sulfate is purchased from Zhengzhou Aikemu Chemical Co., Ltd.; the anti-fogging agent monoglyceride stearate is purchased from Shandong Xinfayu New Material Technology Co., Ltd.; the anti-fogging agent sorbitan monooleate is purchased from Guangzhou Fufei Chemical Technology Co., Ltd., with the brand T-80; the dispersant polyethylene wax is purchased from Hebei Gaocang Chemical Co., Ltd., with the model PE-MAX.

[0034] Example 1

[0035] The first aspect of the present example provides a high-efficiency ionic liquid anti-fogging masterbatch, and the preparation raw materials are as follows in terms of mass fraction: 7 parts of ionic liquid anti-fogging agent, 1 part of dispersant, and 92 parts of thermoplastic resin.

[0036] The preparation raw materials of the ionic liquid anti-fogging agent are ionic liquid and anti-fogging agent, and the mass ratio of ionic liquid to anti-fogging agent is 2:5; the preparation method of the ionic liquid anti-fogging agent is as follows:

[0037] S1, the anti-fog agent is dissolved in anhydrous ethanol to form a 10wt% anti-fog solution;

[0038] S2, the ionic liquid is placed in a vacuum drying oven and dried at 80℃ for 12 hours to remove water and impurities;

[0039] S3, the 10wt% anti-fog solution and the dried ionic liquid are mixed, and the mixed solution is placed on a magnetic stirrer and stirred at 60℃ for 2 hours to obtain a mixed solution;

[0040] S4, the mixed solution after stirring is placed in an ultrasonic cleaner and treated for 30 minutes at a power of 100W to further promote the interaction between the ionic liquid and the anti-fog agent and make the system more uniform and stable, thereby obtaining an ionic liquid anti-fog agent; the prepared ionic liquid anti-fog agent composite system solution is placed in a sealed container and aged at room temperature of 25℃ for 24 hours to make the components in the system fully interact and reach a stable state;

[0041] S5, the prepared ionic liquid anti-fog agent composite system solution after aging is dried in a vacuum drying oven at 60℃ to remove water, thereby obtaining a dried ionic liquid anti-fog agent.

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

[0043] The second aspect of the example provides a preparation method of the high-efficiency ionic liquid anti-fog master batch, specifically: the thermoplastic resin is added to the double-screw extruder in a main feeding mode, the ionic liquid anti-fog agent and the dispersant are added to the double-screw extruder in a side feeding mode, and the materials are melt blended at a temperature of 240℃, a screw rotation speed of 500r / min, and plasticization, thereby obtaining the anti-fog master batch; and the yield of the anti-fog master batch is 500kg / h.

[0044] The third aspect of the example provides an application of the high-efficiency ionic liquid anti-fog master batch, which is applied in the production and preparation of an anti-fog film; and the raw materials for preparing the anti-fog film are specifically 97 parts of PP and 3 parts of the anti-fog master batch according to mass fraction.

[0045] The preparation method of the anti-fog film is as follows: the PP and the anti-fog master batch are weighed by a loss-on-ignition balance and then dropped into a core layer, melted and filtered at 240℃, extruded from a die, cast on a cooling roller at a temperature of 25℃, preheated at a preheating temperature of 200℃, stretched in a stretching section, and then cooled to room temperature of 25℃ in a cooling section, thereby obtaining the anti-fog film.

[0046] Example 2

[0047] The specific embodiment of the present example is the same as that of Example 1, except that the preparation raw materials of the anti-fog master batch are 9 parts of the ionic liquid anti-fog agent, 1 part of the dispersant, and 90 parts of the thermoplastic resin by mass fraction; and the preparation raw materials of the ionic liquid anti-fog agent are the ionic liquid and the anti-fog agent, and the mass ratio of the ionic liquid to the anti-fog agent is 2:7.

[0048] Example 3

[0049] The specific embodiment of the present example is the same as that of Example 1, except that the preparation raw materials of the anti-fog master batch are 11 parts of the ionic liquid anti-fog agent, 1 part of the dispersant, and 88 parts of the thermoplastic resin by mass fraction; and the preparation raw materials of the ionic liquid anti-fog agent are the ionic liquid and the anti-fog agent, and the mass ratio of the ionic liquid to the anti-fog agent is 2:9.

[0050] Comparative Example 1

[0051] The first aspect of the present example provides a high-efficiency ionic liquid anti-fog master batch, and the preparation raw materials thereof are 7 parts of an anti-fog agent, 1 part of a dispersant, and 92 parts of a thermoplastic resin by mass fraction.

[0052] In the present example, the anti-fog agent is monoglyceride stearate, which is used in the form of a 10wt% anhydrous ethanol solution after being dissolved and diluted; the dispersant is polyethylene wax; and the thermoplastic resin is PP.

[0053] The second aspect of the present example provides a preparation method of a high-efficiency ionic liquid anti-fog master batch, and the method specifically comprises the following steps: the thermoplastic resin is added into a double-screw extruder in a main feeding mode, the anti-fog agent and the dispersant are added into the double-screw extruder in a side feeding mode, and then the anti-fog master batch is obtained through melt blending at a temperature of 240℃, plasticizing, and extruding and granulating at a screw rotating speed of 500r / min; and the yield of the anti-fog master batch is 500kg / h.

[0054] The third aspect of the present example provides an application of a high-efficiency ionic liquid anti-fog master batch, and the application is in the production and preparation of an anti-fog film; the preparation raw materials of the anti-fog film are 97 parts of PP and 3 parts of the anti-fog master batch by mass fraction; and the preparation method of the anti-fog film comprises the following steps: the PP and the anti-fog master batch are weighed by a loss-in-weight scale and then dropped into a core layer, the anti-fog film is extruded from a die after being melted and filtered at a temperature of 240℃, the anti-fog film is cast on a cooling roller at a temperature of 25℃, the anti-fog film is stretched after being preheated at a preheating temperature of 200℃ and stretched in a stretching section, and then the anti-fog film is cooled to room temperature of 25℃ in a cooling section, so that the anti-fog film is obtained.

[0055] Comparative Example 2

[0056] The first aspect of the present example provides a high-efficiency ionic liquid anti-fog master batch, and the preparation raw materials thereof are 2 parts of an ionic liquid (the ionic liquid is placed in a vacuum drying box and dried at 80℃ for 12 hours to remove water and impurities before use), 1 part of a dispersant, and 97 parts of a thermoplastic resin by mass fraction.

[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 the example provides a preparation method of the high-efficiency ionic liquid anti-fog master batch, specifically: the thermoplastic resin is added into the double-screw extruder in a main feeding mode, the ionic liquid and the dispersant are added into the double-screw extruder in a side feeding mode, melt blending is performed at a temperature of 240℃, the screw rotation speed is 500r / min, plasticizing is performed, and extrusion granulation is performed to obtain the anti-fog master batch; wherein the yield of the anti-fog master batch is 500kg / h.

[0059] The third aspect of the example provides an application of the high-efficiency ionic liquid anti-fog master batch, which is applied in the production and preparation of anti-fog film; the raw materials for preparing the anti-fog film are specifically 97 parts of PP and 3 parts of the anti-fog master batch according to mass fraction; and the preparation method of the anti-fog film is as follows: the PP and the anti-fog master batch are weighed by the loss weight scale and then dropped into the core layer, melted and filtered at 240℃, extruded from the die, cast on the cooling roller at a temperature of 25℃, preheated at a preheating temperature of 200℃, stretched in the stretching section, and then cooled to room temperature of 25℃ in the cooling section to obtain the anti-fog film.

[0060] Comparative Example 3

[0061] The first aspect of the example provides a high-efficiency ionic liquid anti-fog master batch, and the raw materials for preparing the high-efficiency ionic liquid anti-fog master batch are specifically 9 parts of ionic liquid anti-fog agent and 91 parts of thermoplastic resin according to mass fraction.

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

[0063] S1, dissolving the anti-fog agent into 10wt% anti-fog solution using anhydrous ethanol;

[0064] S2, drying the ionic liquid in a vacuum drying box at 80℃ for 12 hours to remove water and impurities;

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

[0066] S4, placing the stirred mixed solution into an ultrasonic cleaner, and performing ultrasonic treatment for 30 minutes at a power of 100W to obtain the ionic liquid anti-fog agent; and placing the prepared ionic liquid anti-fog agent composite system solution into a sealed container, and aging at room temperature of 25℃ for 24 hours to make the components in the system fully interact and reach a stable state.

[0067] S5, the prepared anti-fogging ionic liquid solution is dried in a vacuum drying oven at 60°C to remove water, and a dried anti-fogging ionic liquid is obtained.

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

[0069] The second aspect of this example provides a method for preparing a high-efficiency anti-fogging ionic liquid master batch, specifically: the thermoplastic resin is added to a twin-screw extruder in a main feeding mode, the anti-fogging ionic liquid is added to the twin-screw extruder in a side feeding mode, and the mixture is melt blended at a temperature of 240°C, with a screw rotation speed of 500 r / min, plasticized, and extruded and granulated to obtain the anti-fogging master batch; wherein the yield of the anti-fogging master batch is 500 kg / h.

[0070] The third aspect of this example provides an application of a high-efficiency anti-fogging ionic liquid master batch, which is applied in the production and preparation of an anti-fogging film; the raw materials for preparing the anti-fogging film are 97 parts of PP and 3 parts of the anti-fogging master batch, according to mass fraction; and the preparation method of the anti-fogging film is as follows: the PP and the anti-fogging master batch are weighed by a loss-in-weight scale and dropped into the core layer, melted and filtered at 240°C, extruded from a die, cast on a cooling roller at a temperature of 25°C, preheated at a temperature of 200°C, stretched in a stretching section, and cooled to room temperature of 25°C in a cooling section, to obtain the anti-fogging 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 imidazole 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-fogging agent is sorbitan monooleate.

[0075] Performance evaluation

[0076] Test object: anti-fogging films prepared in Examples 1-3 and Comparative Examples 1-5.

[0077] Test items and test methods:

[0078] 1. Anti-fogging performance grade test: the cold fog method in GB / T 31726-2015 is used to evaluate the anti-fogging performance of the polypropylene film.

[0079] Evaluation criteria: 1: completely transparent, no water droplets; 2: good transparency, a small amount of uneven large water droplets, 50% or more of the cleaning degree of the visual scale is completely consistent with that before the experiment; 3: basically transparent, with more water droplets; 4: translucent, with many small water droplets; 5: completely opaque.

[0080] 2. Haze test: The haze was tested according to the method of GB / T 2410 with a transmission haze analyzer of type A-4725 of BYK-Gardner, Germany.

[0081] 3. Gloss test: The gloss was tested according to the method of ASTM D 2457-08 at a measuring angle of 45° with a gloss tester of type A-4454 of BYK-Gardner, Germany.

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

[0083] Table 1

[0084] No. Haze (%) Gloss (GU) Moisture content (%) Antifogging performance grade 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, Comparative Examples 1-3, it can be seen that when the modified composite ionic liquid antifog agent and the dispersant exist simultaneously, the antifog masterbatch prepared has excellent antifog performance and low haze.

[0086] From the comparison of the experimental results of Example 2, Example 1 and Example 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), the antifog masterbatch of polypropylene is used for polypropylene film, and the film prepared has excellent antifog effect.

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

[0088] From the comparison of the experimental results of Example 2 and Comparative Examples 4-5, it can be seen that the antifog performance grades of ionic liquid hexadecyl imidazole hydrogen sulfate and 1-butyl-3-methyl imidazole tetrafluoroborate are both 1, but 1-butyl-3-methyl imidazole tetrafluoroborate has lower cost; compared with the antifog agent glyceryl monostearate and sorbitan monooleate, the polypropylene film prepared by using glyceryl monostearate has lower haze and excellent antifog performance.

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

Claims

1. A high-efficiency ionic liquid anti-fogging masterbatch, characterized in that, The raw materials for preparation, by mass, include 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; The mass ratio of the ionic liquid to the antifogging agent is (1-10):(5-20); The ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate; The antifogging agent is glyceryl monostearate; The preparation method of the ionic liquid antifogging agent includes: stirring and mixing the ionic liquid and the antifogging agent, followed by ultrasonic treatment, aging and drying to obtain the ionic liquid antifogging agent.

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

3. A method for preparing a high-efficiency ionic liquid anti-fogging masterbatch according to any one of claims 1-2, characterized in that, include: Ionic liquid anti-fogging agent, dispersant and thermoplastic resin are added to a twin-screw extruder, plasticized, extruded and granulated to obtain anti-fogging masterbatch.

4. The preparation method of the high-efficiency ionic liquid anti-fogging masterbatch according to claim 3, characterized in that, The method for preparing the antifogging masterbatch includes: Thermoplastic resin is added to a twin-screw extruder via main feeding, while ionic liquid anti-fogging agent and dispersant are added to the twin-screw extruder via side feeding. The mixture is melt-blended at a temperature range of 200-260℃, with a screw speed of 400-600 r / min. After plasticizing, the mixture is extruded and granulated to obtain the anti-fogging masterbatch.

5. An application of the high-efficiency ionic liquid anti-fogging masterbatch according to any one of claims 1-2, characterized in that, It is used in the production and preparation of anti-fog films.

6. The application of the high-efficiency ionic liquid anti-fogging masterbatch according to claim 5, characterized in that, The raw materials for preparing the anti-fog film, by weight, include 90-100 parts PP and 1-5 parts anti-fog masterbatch.