Explosion-proof oil for preventing paper from bursting and preparation method of explosion-proof oil

Abstract

The invention relates to the technical field of polyurethane resin, in particular to explosion-proof oil for preventing paper from bursting and a preparation method of the explosion-proof oil. The explosion-proof oil is prepared from the following raw materials: diisocyanate, a chain extender, polyol, a catalyst, tartaric acid, a pH value regulator, deionized water, acetone, a flame retardant, a lubricant, a leveling agent, a defoaming agent, an antioxidant, an anti-ultraviolet agent and a functional filler. The chain extender is formed by matching 2, 2-dimethylolpropionic acid with small molecule diol; the polyol is micro-branched polyester diol with the molecular weight of 2000 to 5000 or mixed polyol formed by matching the micro-branched polyester diol with the molecular weight of 2000 to 5000 with polyether diol and / or polycarbonate diol with the molecular weight of 1000 to 2000. The anti-explosion oil provided by the invention can prevent paper from bursting and improve the use performance of the paper on a packaging material, and the anti-explosion oil is a water-based emulsion system and is more environment-friendly and green.

Description

Technical Field

[0001] The present application relates to the technical field of polyurethane resins, and in particular to an explosion-proof oil for preventing paper from bursting and a preparation method thereof. Background Art

[0002] With the rapid development of industries such as express delivery and luggage, higher environmental protection and toughness requirements are placed on packaging paper materials.

[0003] At present, the existing packaging paper materials are surface-modified by laminating technology to give them good wear resistance, waterproof performance and anti-bending performance. However, the packaging paper materials prepared by laminating technology need to be coated with glue, the preparation process is complicated and the glue coating will produce waste gas, and the overall environmental protection performance needs to be improved. In addition, although the packaging paper prepared by the conventional PE film through the laminating process has a certain bending resistance, after being folded and bent 5 times, cracks will still appear at the bending point, which limits its application development. In some cases, the packaging paper materials also involve sewing. The above-mentioned conventional packaging paper materials also have a phenomenon of bursting needles at the sewing point, affecting the aesthetic appearance of the overall packaging. Therefore, the inventor provides an explosion-proof oil to prevent paper from bursting, and the production and use of the explosion-proof oil meet the requirements of green environmental protection. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides an explosion-proof oil for preventing paper from bursting and a preparation method thereof.

[0005] In the first aspect, the present application provides an explosion-proof oil for preventing paper from bursting, which is achieved through the following technical solutions:

[0006] An explosion-proof oil for preventing paper from bursting, comprising the following raw materials: diisocyanate, chain extender, polyol, catalyst, tartaric acid, pH value regulator, deionized water, acetone, flame retardant, lubricant, leveling agent, defoamer, antioxidant, anti-ultraviolet agent, functional filler;

[0007] The diisocyanate is an aliphatic diisocyanate or a mixed diisocyanate formed by an aliphatic diisocyanate and an aromatic diisocyanate;

[0008] The chain extender is composed of 2,2-dimethylol propionic acid and small molecule diol;

[0009] The small molecule diol is at least one of ethylene glycol, propylene glycol, butanediol, pentanediol, 3-methyl-1,5-pentanediol, and hexanediol;

[0010] The polyol is a slightly branched polyester diol with a molecular weight of 2000-5000 or a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polyether diol and / or a polycarbonate diol with a molecular weight of 1000-2000;

[0011] The ratio of the total mass of the diisocyanate and the chain extender to the total mass of the polyol, the diisocyanate and the chain extender is (28-35):100;

[0012] The molar ratio of the molar amount of -NCO in the diisocyanate to the sum of the molar amount of -OH in the chain extender and the molar amount of -OH in the polyol (1.05-1.40): 1.0;

[0013] The pH regulator is an alcohol amine or ethylenediamine;

[0014] The catalyst is organic tin or organic bismuth;

[0015] The lubricant is polyethylene wax and / or stearate;

[0016] The leveling agent is an organic silicon leveling agent;

[0017] The defoaming agent is at least one of TEGO Airex 901W, TEGO Foamex1488, and TEGO Foamex 3062;

[0018] The antioxidant is composed of at least one of antioxidant 1010, antioxidant 1098, antioxidant 1024, and antioxidant BHT and at least one of antioxidant 168, TPP, and TNPP;

[0019] The anti-ultraviolet agent is at least one of UV-320, UV-326, UV-327, and UV-328.

[0020] The explosion-proof oil in the present application can prevent paper from bursting and improve the performance of paper in packaging materials. The explosion-proof oil is a water-based emulsion system, which is more environmentally friendly and green.

[0021] Preferably, the flame retardant is a reactive flame retardant, the reactive flame retardant includes N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, the molar ratio of the molar amount of -NCO in the diisocyanate to the molar amount of -OH in the chain extender, the molar amount of -OH in the polyol, and the molar amount of -OH in the reactive flame retardant is (1.05-1.40): 1.0, and the added amount of the N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester is equal to 0.5-2.0wt% of the total mass of the diisocyanate, the chain extender, the polyol, and the N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester.

[0022] By adopting the above technical solution, the explosion-proof film formed therefrom is endowed with better flame retardant safety performance.

[0023] Preferably, the diisocyanate is composed of isophorone diisocyanate IPDI and carbodiimide modified MDI in a molar ratio of (65-80):(20-35).

[0024] Preferably, the micro-branched polyester diol is made of 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and tetraisopropyl titanate; the ratio of the molar amount of carboxyl groups in the 1,6-hexanedioic acid to the total molar amount of hydroxyl groups in the 1,2,3,4-butanetetrol, the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and the 3-methyl-1,5-pentanediol is 1:(1.06-1.12); the ratio of the mass of the tetraisopropyl titanate to the mass of the 1,6-hexanedioic acid is 1:(400-1200)

[0025] By adopting the above technical solution, the explosion-proof film formed is endowed with better mechanical strength, weather resistance and good anti-yellowing performance, thereby improving its market competitiveness in packaging paper materials.

[0026] Preferably, 4-8 parts by mass of 3,3,3-trifluoropropylmethyldimethoxysilane and 100 parts by mass of deionized water are uniformly mixed, and then 10-25 parts by mass of a 20-30wt% hydrochloric acid aqueous solution is added dropwise, stirred evenly, and then heated to 60-85°C and stirred for reaction for 10-15 minutes, and 100 parts by mass of toluene are added to extract the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and the obtained supernatant is the toluene solution of the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and then the obtained supernatant is added to a reactor, and 10-20 parts of DMF solvent are added and mixed evenly, and then 1,6-hexanodioic acid, 1,2,3, 4-Butanetetrol, 3-methyl-1,5-pentanediol and tetraisopropyl titanate are uniformly mixed and heated to 130-135.0°C, reacted until water is discharged, then heated to 220-230°C, transesterified for 120-160min, and the acid value is detected. If the acid value is >20mgKOH / g, the transesterified reaction is continued for 10min and the acid value is detected again. The above operation is repeated until the acid value is ≤20mgKOH / g, and finally vacuumed to a pressure of ≤100Pa in the reactor, and the reaction is continued for 10-25min. The hydroxyl value of the material in the reactor is detected, and the hydroxyl value is 20.0-55.0mgKOH / g. Nitrogen is injected to restore normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol is obtained by filling and collecting.

[0027] The preparation method of the micro-branched polyester diol provided by the present invention is relatively simple, the operation difficulty is relatively low, and it is suitable for industrial production, thereby reducing the overall production cost of the micro-branched polyester diol and facilitating the improvement of the market competitiveness of the product explosion-proof oil.

[0028] Preferably, the polyol is a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polycarbonate diol with a molecular weight of 1000-2000; the polycarbonate diol is polycaprolactone hexamethylene carbonate diol and / or polycarbonate 3-methyl 1,5 pentanediol-1,6-hexanediol ester diol.

[0029] Preferably, the polyol is composed of a slightly branched polyester diol with a molecular weight of 4000 and polycarbonate 3-methyl 1,5-pentanediol-1,6-hexanediol ester diol C-2020 with a molecular weight of 2000 in a mass ratio of (85-90):(10-15).

[0030] By optimizing the polyol formula, not only can the explosion-proof film formed therefrom be given better mechanical strength and weather resistance, but the flexibility of the explosion-proof film and the processing performance of the explosion-proof needle can also be improved, thereby enhancing the easy processing and stability of the packaging paper material prepared therefrom.

[0031] Preferably, the functional filler comprises at least one of nanocellulose, boron nitride whiskers and hydroxylated graphene in combination with nanosilicon dioxide; the mass of the functional filler is equal to 0.5-5wt% of the total mass of the diisocyanate, the chain extender and the polyol.

[0032] By adopting the above technical scheme, the formed explosion-proof film can be further improved in terms of mechanical strength and weather resistance, and unique functional properties can also be given to it. For example, the addition of nanocellulose can improve the leveling processing performance while enhancing the bonding strength and bonding stability of the interface between the formed explosion-proof film and the paper; the addition of boron nitride whiskers can improve the flexibility, tensile strength, anti-ultraviolet aging performance, and heat-resistant stability of the explosion-proof film; the addition of hydroxylated graphene can improve the flexibility, tensile strength, anti-ultraviolet aging performance, and heat-resistant stability of the explosion-proof film while also giving the explosion-proof film better antibacterial and mildew-proof properties and flame retardancy.

[0033] Preferably, the explosion-proof oil for preventing paper from bursting comprises the following raw materials in parts by weight: 144.9-177.8 parts of isophorone diisocyanate IPDI, 50-100 parts of carbodiimide modified MDI, 25-60 parts of 2,2-dihydroxymethyl propionic acid, 20-60 parts of 3-methyl-1,5-pentanediol, 600-2000 parts of slightly branched polyester diol, 100-600 parts of polycarbonate diol, 0. 5-0.75 parts of catalyst-dibutyltin dilaurate, 7-25 parts of tartaric acid, 20-60 parts of dimethylethanolamine, 1500-2500 parts of deionized water, 400-800 parts of acetone, 10-25 parts of flame retardant, 5-25 parts of lubricant, 5-25 parts of leveling agent, 5-25 parts of defoaming agent, 5-25 parts of antioxidant, 5-25 parts of anti-ultraviolet agent, 10-80 parts of functional filler.

[0034] By optimizing the explosion-proof film formula, the film's resistance to moisture and heat aging is further improved while ensuring the film's flexibility and tensile properties, while reducing the overall production cost and achieving strong industrial performance.

[0035] In the second aspect, the present application provides a method for preparing explosion-proof oil for preventing paper from bursting, which is achieved through the following technical solutions:

[0036] A method for preparing explosion-proof oil for preventing paper from bursting comprises the following steps:

[0037] Step 1, preparation of slightly branched polyester diol;

[0038] Step 2, adding the slightly branched polyester diol in step 1 to a reaction kettle, vacuum dehydrating for 1-2 hours, then adding accurately measured diisocyanate, other polyols, antioxidants, anti-ultraviolet agents, and catalysts, mixing evenly, reacting at 90-95° C. for 2-3 hours, cooling to 70-80° C., adding chain extenders and flame retardants, reacting for 45-60 minutes, then adding accurately measured tartaric acid, maintaining the temperature at 70-80° C. for 20-45 minutes, adding acetone to dilute the system to a viscosity of 2500-5000 mPa·s, cooling to 40-45° C., adding a pH regulator and reacting for 3-5 minutes to obtain a semi-finished polyurethane resin;

[0039] Step three, after adding deionized water, high-speed shear emulsification treatment is carried out for 5-10 minutes, the high-speed shear speed is 2750-3200rpm, and then accurately measured lubricants, leveling agents, defoaming agents, and functional fillers are added, and stirred at 600-800rpm for 5-15min, then reduced to 200-400rpm and stirred for 15-30min, and acetone is removed by distillation to obtain the finished product - water-based polyurethane explosion-proof oil.

[0040] The preparation method provided in the present invention is relatively simple, and the operation difficulty is relatively low, which is convenient for realizing industrialized manufacturing, thereby reducing the overall production cost of the finished product - water-based polyurethane explosion-proof oil, and facilitating rapid promotion for use in packaging paper materials.

[0041] In summary, this application has the following advantages:

[0042] 1. The explosion-proof oil in the present invention can prevent paper from bursting and improve the performance of paper on packaging materials. The explosion-proof oil is a water-based emulsion system, which is more environmentally friendly and green.

[0043] 2. The inventors have optimized the explosion-proof oil formula to further improve the moisture-heat aging resistance of the explosion-proof film while ensuring the flexibility and tensile properties of the formed explosion-proof film, while reducing the overall production cost.

[0044] 3. The self-made micro-branched polyester diol in this application has multi-functional properties, which can improve the tensile strength and hydrolysis stability of the formed explosion-proof film. The formula design of the micro-branched polyester diol and the polycarbonate diol ensures the flexibility and tensile properties of the formed explosion-proof film while having good hydrolysis resistance, wear resistance and UV aging resistance.

[0045] 4. The unique functional filler used in the formula of the present invention is used to functionally design the explosion-proof membrane, which can meet the customized needs of customers and at the same time give the explosion-proof membrane better mechanical strength, flexibility, heat resistance, wear resistance and antibacterial hygiene.

[0046] 5. The operations designed in the preparation method of the micro-branched polyester diol and the preparation method of the explosion-proof oil for preventing paper bursting in the present invention are relatively simple, and the operation difficulty is relatively low, which is convenient for industrial manufacturing, thereby reducing the overall production cost of the finished product - water-based polyurethane explosion-proof oil, and facilitating rapid promotion for use in packaging paper materials. DETAILED DESCRIPTION

[0047] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples and comparative examples.

[0048] Preparation Example

[0049] Preparation Example 1: Micro-branched polyester diol is prepared from 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and tetraisopropyl titanate. The molar ratio of 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, and 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate is 5:1:2.3:1. The mass ratio of tetraisopropyl titanate to the mass ratio of 1,6-hexanedioic acid is 1:400.

[0050] The preparation method of slightly branched polyester diol is as follows:

[0051] S1. First, 20.2g of 3,3,3-trifluoropropylmethyldimethoxysilane and 500g of deionized water were stirred at 120rpm for 5min, and 44g of a 20wt% aqueous solution of hydrochloric acid was added dropwise after mixing, and stirred at 120rpm for 5min. After stirring, the temperature was raised to 75°C and stirred for 10min. The acid value of the detection system was 220.8mgKOH / g. 500g of toluene was added to extract the hydrolyzate of 3,3,3-trifluoropropylmethyldimethoxysilane, and the supernatant obtained was a toluene solution of 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate;

[0052] S2. Take 500 g of the supernatant obtained in S1 and add it to the reactor, add 3.0 kg of DMF solvent and stir at 120 rpm for 5 min, mix well, add 730.7 g of 1,6-hexanodioic acid, 122.2 g of 1,2,3,4-butanetetrol, 271.8 g of 3-methyl-1,5-pentanediol, and 1.8 g of tetraisopropyl titanate according to the ratio, mix well, heat to 135 ° C, react until water is discharged, and then heat to 225 ° C, and transesterify for 130 min;

[0053] S3. The acid value of the system is regularly detected at an interval of 10 minutes. When the acid value is >20 mgKOH / g, the ester exchange reaction is continued for 10 minutes and the acid value is detected again. The above operation is repeated until the acid value is ≤20 mgKOH / g; specifically, the acid value is detected to be 4.1 mgKOH / g after continuing the reaction for 10 minutes, the pressure in the reactor is evacuated to between 5.0 and 10.0 Pa, the reaction is continued for 20 minutes, the hydroxyl value of the material in the reactor is detected, the hydroxyl value is 55.8 mgKOH / g, and the acid value = 0.31 mgKOH / g, nitrogen is flushed in to restore normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol with a molecular weight of 2000 is obtained by filling and collecting.

[0054] The difference between Preparation Example 2 and Preparation Example 1 is: S3. The acid value of the system is regularly detected, the detection interval is 10min, when the acid value>20mgKOH / g, the ester exchange reaction is continued for 10min and the acid value is detected again, and the above operation is repeated until the acid value is ≤20mgKOH / g; specifically, the acid value is detected to be 3.9mgKOH / g after continuing the reaction for 10min, the pressure in the reactor is evacuated to between 5.0-10.0Pa, the reaction is continued for 45min, the hydroxyl value of the material in the reactor is detected, the hydroxyl value is 37.2mgKOH / g, the acid value is ≤0.22mgKOH / g, nitrogen is flushed into the reactor to restore normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol with a molecular weight of 3000 is obtained by filling and collecting.

[0055] The difference between Preparation Example 3 and Preparation Example 1 is: S3. The acid value of the system is regularly detected, the detection interval is 10min, when the acid value>20mgKOH / g, the ester exchange reaction is continued for 10min and the acid value is detected again, and the above operation is repeated until the acid value is ≤20mgKOH / g; specifically, the acid value is detected to be 4.0mgKOH / g after continuing the reaction for 10min, the pressure in the reactor is evacuated to between 5.0-10.0Pa, the reaction is continued for 65min, the hydroxyl value of the material in the reactor is detected, the hydroxyl value is 27.9mgKOH / g, the acid value is ≤0.19mgKOH / g, nitrogen is flushed into the reactor to restore normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol with a molecular weight of 4000 is obtained by filling and collecting.

[0056] The difference between Preparation Example 4 and Preparation Example 1 is that: S3. The acid value of the system is regularly detected, and the detection interval is 10min. When the acid value is >20mgKOH / g, the ester exchange reaction is continued for 10min and the acid value is detected again, and the above operation is repeated until the acid value is ≤20mgKOH / g; specifically, the acid value is detected to be 3.5mgKOH / g after continuing the reaction for 15min, the pressure in the reactor is evacuated to between 5.0-10.0Pa, the reaction is continued for 90min, the hydroxyl value of the material in the reactor is detected, the hydroxyl value is 22.3mgKOH / g, the acid value = 0.14mgKOH / g, nitrogen is flushed into the reactor to restore the normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol with a molecular weight of 5000 is obtained by filling and collecting.

[0057] The difference between Preparation Example 5 and Preparation Example 3 is that the molar ratio of 1,6-adipic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, and 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate is 5:0.5:3.3:1.

[0058] The difference between Preparation Example 6 and Preparation Example 3 is that the molar ratio of 1,6-adipic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, and 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate is 5:1:3.3:0.5.

[0059] The difference between Preparation Example 7 and Preparation Example 1 is that the slightly branched polyester diol is prepared from 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, and tetraisopropyl titanate. The molar ratio of 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, and 3-methyl-1,5-pentanediol is 5:3.3:1. The mass ratio of tetraisopropyl titanate to the mass of 1,6-hexanedioic acid is 1:400.

[0060] The preparation method of slightly branched polyester diol is as follows:

[0061] S1. Add 3.0 kg of DMF solvent, 730.7 g of 1,6-hexanodioic acid, 390.0 g of 3-methyl-1,5-pentanediol, and 1.8 g of tetraisopropyl titanate into the reactor and stir at 120 rpm for 5 min. Mix well and heat to 135 ° C. React until water is discharged, then heat to 225 ° C. and transesterify for 120 min.

[0062] S2. The acid value of the system is regularly detected at an interval of 10 minutes. When the acid value is >20 mgKOH / g, the transesterification reaction is continued for 10 minutes and the acid value is detected again. The above operation is repeated until the acid value is ≤20 mgKOH / g; specifically, the acid value is detected to be 3.7 mgKOH / g after continuing the reaction for 10 minutes, the pressure in the reactor is evacuated to between 5.0 and 10.0 Pa, the reaction is continued for 18 minutes, the hydroxyl value of the material in the reactor is detected, the hydroxyl value is 55.6 mgKOH / g, and the acid value = 0.27 mgKOH / g, nitrogen is flushed in to restore normal pressure, the water bath is cooled to room temperature, and the micro-branched polyester diol with a molecular weight of 2000 is obtained by filling and collecting.

[0063] Example

[0064] An explosion-proof oil for preventing paper from bursting is prepared from the following raw materials: diisocyanate, chain extender, polyol, catalyst, tartaric acid, pH value regulator, deionized water, acetone, flame retardant, lubricant, leveling agent, defoamer, antioxidant, anti-ultraviolet agent and functional filler.

[0065] Preferably, the invention comprises the following raw materials in parts by weight: 144.9-177.8 parts of isophorone diisocyanate IPDI, 50-100 parts of carbodiimide modified MDI, 25-60 parts of 2,2-dimethylol propionic acid, 20-60 parts of 3-methyl-1,5-pentanediol, 600-2000 parts of slightly branched polyester diol, 100-600 parts of polycarbonate diol, 0.5-0.75 parts of catalyst-dibutyltin dilaurate, 7-25 parts of tartaric acid, 20-60 parts of dimethylethanolamine, 1500-2500 parts of deionized water, 400-800 parts of acetone, 10-25 parts of flame retardant, 5-25 parts of lubricant, 5-25 parts of leveling agent, 5-25 parts of defoaming agent, 5-25 parts of antioxidant, 5-25 parts of anti-ultraviolet agent, 10-80 parts of functional filler.

[0066] The diisocyanate is an aliphatic diisocyanate or a mixed diisocyanate formed by an aliphatic diisocyanate and an aromatic diisocyanate. Preferably, the diisocyanate is composed of isophorone diisocyanate IPDI and carbodiimide-modified MDI in a molar ratio of (65-80):(20-35).

[0067] The flame retardant is preferably a reactive flame retardant, which can overcome the problems of poor compatibility and easy precipitation of flame retardants.

[0068] The reactive flame retardant is preferably diethyl N,N-bis(2-hydroxyethyl)aminomethylenephosphonate.

[0069] The molar ratio of the molar amount of -NCO in the diisocyanate to the molar amount of -OH in the chain extender, the molar amount of -OH in the polyol, and the molar amount of -OH in the reactive flame retardant (1.05-1.40) is 1.0. The amount of N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester added is equal to 0.5-2.0wt% of the total mass of diisocyanate, chain extender, polyol, and N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester.

[0070] The chain extender is composed of 2,2-dimethylol propionic acid and small molecule diol. The small molecule diol is at least one of ethylene glycol, propylene glycol, butanediol, pentanediol, 3-methyl-1,5-pentanediol, and hexanediol. Preferably, the chain extender is composed of 2,2-dimethylol propionic acid and 3-methyl-1,5-pentanediol, which can give the formed explosion-proof film better flexibility.

[0071] The polyol is a slightly branched polyester diol with a molecular weight of 2000-5000 or a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polyether diol and / or a polycarbonate diol with a molecular weight of 1000-2000.

[0072] The micro-branched polyester diol is prepared from 1,6-adipic acid, 1,2,3,4-butanetetrol, 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, 3-methyl-1,5-pentanediol and tetraisopropyl titanate.

[0073] The ratio of the molar amount of carboxyl groups in 1,6-hexanedioic acid to the total molar amount of hydroxyl groups in 1,2,3,4-butanetetrol, 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate and 3-methyl-1,5-pentanediol is 1:(1.06-1.12).

[0074] The mass ratio of tetraisopropyl titanate to 1,6-adipic acid is 1:(400-1200).

[0075] The preparation method of the slightly branched polyester diol refers to the preparation of the slightly branched polyester diol in Preparation Example 1-6.

[0076] Preferably, the polyol is a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polycarbonate diol with a molecular weight of 1000-2000. The polycarbonate diol is polycarbonate caprolactone hexamethylene diol and / or polycarbonate 3-methyl 1,5 pentanediol-1,6-hexanediol ester diol. The molar ratio of the slightly branched polyester diol to the polycarbonate diol is (60-80):(20-40).

[0077] More preferably, the polyol is composed of a slightly branched polyester diol with a molecular weight of 4000 and polycarbonate 3-methyl 1,5-pentanediol-1,6-hexanediol ester diol C-2020 with a molecular weight of 2000 in a mass ratio of (85-90):(10-15).

[0078] The ratio of the total mass of diisocyanate and chain extender to the total mass of polyol, diisocyanate and chain extender is (28-35):100, which can ensure that the prepared explosion-proof membrane has good flexibility and explosion-proof properties.

[0079] The molar ratio of the molar amount of -NCO in the diisocyanate to the sum of the molar amount of -OH in the chain extender and the molar amount of -OH in the polyol (1.05-1.40): 1.0 can ensure that the explosion-proof film has excellent bonding strength with the packaging paper, thereby improving the bending resistance.

[0080] The pH value regulator is an alcohol amine or ethylenediamine, specifically dimethylethanolamine.

[0081] The catalyst is organic tin or organic bismuth, specifically dibutyltin dilaurate.

[0082] The lubricant is polyethylene wax and / or stearate, specifically polyethylene wax.

[0083] The leveling agent is an organic silicone leveling agent, specifically an organic silicone leveling agent BYK-333.

[0084] The defoaming agent is at least one of TEGO Airex 901W, TEGO Foamex1488, and TEGO Foamex 3062. Preferably, the defoaming agent is TEGO Foamex1488.

[0085] The antioxidant is composed of at least one of antioxidant 1010, antioxidant 1098, antioxidant 1024, and antioxidant BHT and at least one of antioxidant 168, TPP, and TNPP. Preferably, the antioxidant is antioxidant 1098 and antioxidant 168.

[0086] The anti-ultraviolet agent is at least one of UV-320, UV-326, UV-327 and UV-328. Preferably, the anti-ultraviolet agent is UV-327.

[0087] The functional filler includes at least one of nanocellulose, boron nitride whiskers, and hydroxylated graphene in the combination of nanosilicon dioxide. Preferably, the functional filler is composed of nanosilicon dioxide, boron nitride whiskers, and hydroxylated graphene in a mass ratio of 7:2:1. The mass of the functional filler is equal to 0.5-5wt% of the total mass of diisocyanate, chain extender, and polyol. Preferably, the mass of the functional filler is equal to 3.0wt% of the total mass of diisocyanate, chain extender, and polyol.

[0088] A method for preparing explosion-proof oil for preventing paper from bursting comprises the following steps:

[0089] Step 1, preparation of slightly branched polyester diol, see the preparation of slightly branched polyester diol in Preparation Example 1-6;

[0090] Step 2, adding the slightly branched polyester diol in step 1 to a reaction kettle, vacuum dehydrating for 1-2 hours, then adding accurately measured diisocyanate, other polyols, antioxidants, anti-ultraviolet agents, and catalysts, mixing evenly, reacting at 90-95° C. for 2-3 hours, cooling to 70-80° C., adding chain extenders and flame retardants, reacting for 45-60 minutes, then adding accurately measured tartaric acid, maintaining the temperature at 70-80° C. for 20-45 minutes, adding acetone to dilute the system to a viscosity of 2500-5000 mPa·s, cooling to 40-45° C., adding a pH regulator and reacting for 3-5 minutes to obtain a semi-finished polyurethane resin;

[0091] Step three, after adding deionized water, high-speed shear emulsification treatment is carried out for 5-10 minutes, the high-speed shear speed is 2750-3200rpm, and then accurately measured lubricants, leveling agents, defoaming agents, and functional fillers are added, and stirred at 600-800rpm for 5-15min, then reduced to 200-400rpm and stirred for 15-30min, and acetone is removed by distillation to obtain the finished product - water-based polyurethane explosion-proof oil.

[0092] Example 1: An explosion-proof oil for preventing paper from bursting is prepared from 155.8 g of isophorone diisocyanate IPDI, 95.1 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 46.1 g of 3-methyl-1,5-pentanediol, 820 g of the slightly branched polyester diol in Preparation Example 1, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-di(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12 g of lubricant-polyethylene wax, 10 g of leveling agent-BYK-333, and 8 g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0093] A method for preparing explosion-proof oil for preventing paper from bursting comprises the following steps:

[0094] Step 1, preparation of slightly branched polyester diol, see the preparation of slightly branched polyester diol in Preparation Example 1;

[0095] Step 2: Add 820 g of the slightly branched polyester diol in step 1 into the reactor, vacuum dehydrate for 2 h, then add 155.8 g of isophorone diisocyanate IPDI, 95.1 g of carbodiimide modified MDI, 9 g of antioxidant 1098, 1 g of antioxidant 168, 10 g of UV inhibitor UV-327, and 0.60 g of catalyst-dibutyltin dilaurate, stir and mix at 200 rpm for 5 min, mix evenly, react at 92.5 ° C for 2 h, and cool down. 24.2 g of 2,2-dihydroxymethylpropionic acid, 46.1 g of 3-methyl-1,5-pentanediol and 7.3 g of flame retardant N,N-di(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester were added at 80° C., and the mixture was reacted for 60 min. Then, 15.1 g of tartaric acid was added and the mixture was reacted at 80° C. for 30 min. 500 g of acetone was added to dilute the mixture to a viscosity of 3450 mPa·s. At the same time, the mixture was cooled to 40° C., and 34 g of dimethylethanolamine was added to neutralize the mixture and reacted for 5 min to obtain a semi-finished polyurethane resin.

[0096] Step three, add 1500g of deionized water and then perform high-speed shear emulsification treatment for 10min, the high-speed shear speed is 3150rpm, then add accurately measured 10g of lubricant-polyethylene wax, 12g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 28g of nano-silicon dioxide, 10g of boron nitride whisker, stir at 600rpm for 8min, reduce to 240rpm and stir for 22min, distill and remove acetone to obtain the finished product-waterborne polyurethane explosion-proof oil.

[0097] The difference between Example 2 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPDI, 95.1g of carbodiimide modified MDI, 31.6g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 710g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 11g of lubricant-polyethylene wax, 9g of leveling agent-BYK-333, 7.3g of defoaming agent-TEGO Foamex 1488, 8.1g of antioxidant 1098, 0.9g of antioxidant 168, 9g of anti-ultraviolet agent UV-327, 26g of nano silicon dioxide, and 9g of boron nitride whisker.

[0098] The difference between Example 3 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPDI, 95.1g of carbodiimide modified MDI, 31.4g of 2,2-dihydroxymethylpropionic acid, 50.9g of 3-methyl-1,5-pentanediol, 632g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-di(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 10.2g of lubricant-polyethylene wax, 8.6g of leveling agent-BYK-333, 6.8g of defoaming agent-TEGO Foamex 1488, 7.9g of antioxidant 1098, 0.7g of antioxidant 168, 9g of anti-ultraviolet agent UV-327, 25g of nano silicon dioxide, and 8g of boron nitride whisker.

[0099] The difference between Example 4 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPDI, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 60.3g of 3-methyl-1,5-pentanediol, 870g of the slightly branched polyester diol in Preparation Example 2, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0100] The difference between Example 5 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 68.6g of 3-methyl-1,5-pentanediol, 880g of the slightly branched polyester diol in Preparation Example 3, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0101] The difference between Example 6 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 73.3g of 3-methyl-1,5-pentanediol, 900g of the slightly branched polyester diol in Preparation Example 4, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0102] The difference between Example 7 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 68.6 g of 3-methyl-1,5-pentanediol, 880 g of the slightly branched polyester diol in Preparation Example 5, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12 g of lubricant-polyethylene wax, 10 g of leveling agent-BYK-333, 8 g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0103] The difference between Example 8 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 68.6 g of 3-methyl-1,5-pentanediol, 880 g of the slightly branched polyester diol in Preparation Example 6, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-di(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12 g of lubricant-polyethylene wax, 10 g of leveling agent-BYK-333, 8 g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0104] The difference between Example 9 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 177.9 g of isophorone diisocyanate IPD I, 105.2 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 65.7 g of 3-methyl-1,5-pentanediol, 976 g of the slightly branched polyester diol in Preparation Example 6, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-di(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12 g of lubricant-polyethylene wax, 10 g of leveling agent-BYK-333, 8 g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0105] The difference between Example 10 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 211.2 g of isophorone diisocyanate IPD I, 112.6 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 63.2 g of 3-methyl-1,5-pentanediol, 1060 g of the slightly branched polyester diol in Preparation Example 6, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12 g of lubricant-polyethylene wax, 10 g of leveling agent-BYK-333, 8 g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0106] The difference between Example 11 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MD I, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 697g of the slightly branched polyester diol in Preparation Example 1, 123g of polycarbonate 3-methyl-1,5-pentanediol-1,6-hexanediol ester diol C-2020 with a molecular weight of 2000, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0107] The difference between Example 12 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MD I, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 492g of the slightly branched polyester diol in Preparation Example 1, 328g of polycarbonate 3-methyl 1,5-pentanediol-1,6-hexanediol ester diol C-2020 with a molecular weight of 2000, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0108] The difference between Example 13 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MD I, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 656g of the slightly branched polyester diol in Preparation Example 1, 164g of polycarbonate caprolactone hexamethylene glycol CD2220PL with a molecular weight of 2000, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO It is made of Foamex1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide and 10g of boron nitride whisker.

[0109] The difference between Example 14 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 4.6g of nano silicon dioxide, and 1.8g of boron nitride whisker.

[0110] The difference between Example 15 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 14g of nano silicon dioxide, and 4.8g of boron nitride whisker.

[0111] The difference between Example 16 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8 g of isophorone diisocyanate IPD I, 95.1 g of carbodiimide modified MDI, 24.2 g of 2,2-dihydroxymethylpropionic acid, 46.1 g of 3-methyl-1,5-pentanediol, 820 g of the slightly branched polyester diol in Preparation Example 1, 0.60 g of catalyst-dibutyltin dilaurate, 15.1 g of tartaric acid, 34 g of dimethylethanolamine, 1500 g of deionized water, 500 g of acetone, 7.3 g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12.8 g of lubricant-polyethylene wax, 10.2 g of leveling agent-BYK-333, 8.2 g of defoaming agent-TEGO Foamex 1488, 9.2g of antioxidant 1098, 1g of antioxidant 168, 10.2g of anti-ultraviolet agent UV-327, 49.5g of nano silicon dioxide, and 16.5g of boron nitride whisker.

[0112] The difference between Example 17 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 33g of nano silicon dioxide, and 5g of hydroxylated graphene.

[0113] The difference between Example 18 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, 8g of boron nitride whisker, and 4g of hydroxylated graphene.

[0114] The difference between Comparative Example 1 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 26.9g of 2,2-dihydroxymethylpropionic acid, 35.5g of 3-methyl-1,5-pentanediol, 960g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 13.4g of lubricant-polyethylene wax, 11.2g of leveling agent-Bick BYK-333, 9g of defoaming agent-TEGO Foamex 1488, 10g of antioxidant 1098, 1.2g of antioxidant 168, 11.2g of anti-ultraviolet agent UV-327, 32g of nano silicon dioxide, and 10g of boron nitride whisker.

[0115] The difference between Comparative Example 2 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 26.9g of 2,2-dihydroxymethylpropionic acid, 61.5g of 3-methyl-1,5-pentanediol, 632g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 9.1g of lubricant-polyethylene wax, 7.6g of leveling agent-BYK-333, 6.0g of defoaming agent-TEGO Foamex 1488, 7.1g of antioxidant 1098, 0.5g of antioxidant 168, 7.6g of anti-ultraviolet agent UV-327, 31g of nano silicon dioxide, and 8g of boron nitride whisker.

[0116] The difference between Comparative Example 3 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 40.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 7, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0117] The difference between Comparative Example 4 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 40.1g of 3-methyl-1,5-pentanediol, 820g of polybutylene adipate diol with a molecular weight of 2000 (provided by Shanghai Hongzhuang Chemical Technology Co., Ltd.), 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-Bick BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0118] The difference between Comparative Example 5 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 149.0g of isophorone diisocyanate IPD I, 87.6g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 69.2g of 3-methyl-1,5-pentanediol, 860g of the slightly branched polyester diol in Preparation Example 6, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0119] The difference between Comparative Example 6 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 209g of isophorone diisocyanate IPD I, 127.8g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 62.1g of 3-methyl-1,5-pentanediol, 1100g of the slightly branched polyester diol in Preparation Example 6, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 28g of nano silicon dioxide, and 10g of boron nitride whisker.

[0120] The difference between Comparative Example 7 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, and 10g of anti-ultraviolet agent UV-327.

[0121] The difference between Comparative Example 8 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPD I, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 1.9g of nano silicon dioxide, and 0.6g of boron nitride whisker.

[0122] The difference between Comparative Example 9 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPDI, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, 59.2g of nano silicon dioxide, and 19.8g of boron nitride whisker.

[0123] The difference between Comparative Example 10 and Example 1 is that an explosion-proof oil for preventing paper from bursting is composed of 155.8g of isophorone diisocyanate IPDI, 95.1g of carbodiimide modified MDI, 24.2g of 2,2-dihydroxymethylpropionic acid, 46.1g of 3-methyl-1,5-pentanediol, 820g of the slightly branched polyester diol in Preparation Example 1, 0.60g of catalyst-dibutyltin dilaurate, 15.1g of tartaric acid, 34g of dimethylethanolamine, 1500g of deionized water, 500g of acetone, 7.3g of flame retardant-N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 12g of lubricant-polyethylene wax, 10g of leveling agent-BYK-333, 8g of defoaming agent-TEGO Foamex 1488, 9g of antioxidant 1098, 1g of antioxidant 168, 10g of anti-ultraviolet agent UV-327, and 38g of nano silicon dioxide.

[0124] Performance testing

[0125] 1. Storage stability performance test method: Pour the explosion-proof oil prepared in Example 1-18 and Comparative Example 1-10 into a centrifuge, and adjust the centrifuge speed to 3*10 3 rpm, and observe whether the sample produces precipitation after rotating for 15 minutes. If precipitation occurs in the sample, it is considered that the storage stability performance of the sample does not meet the standard (the sample does not have the storage stability for more than half a year); if no precipitation occurs in the sample, it is considered that the storage stability performance of the sample meets the standard (the sample has the storage stability for more than half a year).

[0126] 2. Preparation of test wrapping paper: The explosion-proof oil prepared in Examples 1-18 and Comparative Examples 1-10 was scraped onto wrapping paper with a scraping thickness of 0.10 mm, and dried in an oven at 80° C. for 12 h to obtain wrapping paper test samples 1-18 and wrapping paper comparative test samples 1-10.

[0127] Wear resistance test: According to the GMW 3208-2012 rotation wear test, the explosion-proof films formed on the test samples 1-18 and the comparison test samples 1-10 were tested for wear resistance. If CS-101KG is not damaged after 400 times, it is considered qualified. If CS-101KG is damaged after 400 times, it is considered unqualified. Three groups of repeated tests are carried out on each sample to obtain the average value for recording and tabulation.

[0128] Folding resistance test a: Packaging paper test samples 1-18 and packaging paper comparison test samples 1-10 are bent up and down 90° as a single bending number, and then bent up and down 90° again after an interval of 5s. The cycle of bending up and down 90° is repeated 100 times. After every 10 bends, observe whether the explosion-proof film and paper in the experiment are broken or fall off. If the explosion-proof film and paper are broken or fall off after n observations, it is determined that the maximum 90° bending resistance of the sample is n-10 times.

[0129] Folding resistance test b: Packaging paper test samples 1-18 and packaging paper comparison test samples 1-10 are bent up and down 180° as a single bending number, and then bent up and down 180° again after an interval of 10s. The cycle of bending up and down 90° is repeated 50 times. After every 5 bendings, observe whether the explosion-proof film and paper in the experiment are broken or fall off. If the explosion-proof film and paper are broken or fall off after n observations, it is determined that the maximum 180° bending resistance of the sample is n-5 times.

[0130] Peel strength test: According to GB / T 2791-1995 "Adhesive T peel strength test method - Flexible material to flexible material", the peel strength (N / 3cm) between the explosion-proof film and the packaging paper is tested.

[0131] Preparation of explosion-proof resin film: The explosion-proof oil prepared in Examples 1-18 and Comparative Examples 1-10 was scraped onto release paper with a scraping thickness of 0.10 mm, and dried in an oven at 130°C for 8 hours to obtain explosion-proof resin film test samples 1-18 and explosion-proof resin film comparison test samples 1-10, and elongation breaking rate test and breaking strength test were performed on them using a universal testing machine: Shimadzu universal testing machine AGS-X. The hardness of the explosion-proof resin film was measured using a Yuntang YT-810D portable Shore hardness tester.

[0132] Data analysis

[0133] Table 1: Test parameter table of waterborne polyurethane explosion-proof oil in Examples 1-18 and Comparative Examples 1-10

[0134]

[0135]

[0136] Combining Examples 1-3 and Comparative Examples 1-2 and Table 1, it can be seen that the hard segment content of the polyurethane latex in the explosion-proof oil is preferably controlled at 28-35wt%. Too low a hard segment content affects the wear resistance and mechanical strength of the explosion-proof film, while too high a hard segment content affects the wear resistance and mechanical strength of the explosion-proof film. The wear resistance and mechanical strength can be improved, but the overall anti-bending performance is relatively deviated.

[0137] It can be seen from Example 1, Examples 4-8 and Comparative Examples 3-4 and Table 1 that the explosion-proof film prepared using the micro-branched polyester diol prepared in the present application has comprehensive advantages in wear resistance, mechanical strength and bending resistance. Preferably, the molecular weight of the micro-branched polyester diol is controlled to 4000, and the final explosion-proof film has relatively excellent bending resistance.

[0138] It can be seen from Example 1, Examples 9-10 and Comparative Examples 5-6 and Table 1 that the molar ratio of the molar amount of -NCO in the diisocyanate to the sum of the molar amount of -OH in the chain extender and the molar amount of -OH in the polyol (1.05-1.40) is preferably 1.0. If it is too low, it will affect the bonding stability between the explosion-proof film and the packaging paper, resulting in a significant decrease in the anti-bending performance. If it is too high, it will affect the cross-linking density of the explosion-proof film, resulting in the explosion-proof film becoming brittle as a whole, decreasing its flexibility, and also resulting in a significant decrease in the anti-bending performance.

[0139] It can be seen from Example 1, Examples 11-13 and Comparative Example 4 and Table 1 that the introduction of polycarbonate diol into the polyurethane latex molecular chain has no negative impact on the anti-bending performance of the explosion-proof film, and can improve the mechanical strength and wear resistance of the explosion-proof film.

[0140] It can be seen from Example 1, Examples 14-16 and Comparative Examples 7-10 and Table 1 that the addition of functional fillers can improve the anti-bending performance, mechanical strength and wear resistance of the explosion-proof membrane, but excessive addition of functional fillers will affect the anti-bending performance of the explosion-proof membrane. Therefore, the addition amount of functional fillers is preferably controlled at 0.5-5wt%, preferably in the range of 1.5-3.0wt%.

[0141] It can be seen from Example 1, Examples 14-18 and Comparative Examples 7-10 and Table 1 that the functional filler composed of at least one of nanocellulose, boron nitride whiskers and hydroxylated graphene in the combination of nanosilicon dioxide can improve the bending resistance and mechanical strength of the explosion-proof film, that is, the functional filler can improve the flexibility of the explosion-proof film without losing mechanical strength.

[0142] In summary, the explosion-proof oil in the present invention can prevent paper from bursting and improve the performance of paper on packaging materials. The explosion-proof oil is an aqueous emulsion system, which is more environmentally friendly and green. In addition, the optimization design of the explosion-proof oil formula further improves the moisture and heat aging resistance of the explosion-proof film while ensuring the flexibility and tensile properties of the formed explosion-proof film, while reducing the overall production cost. The packaging paper material prepared by using the explosion-proof oil has stronger market competitiveness.

Claims

1. An explosion-proof oil for preventing paper from bursting, characterized in that: It is made of the following raw materials: diisocyanate, chain extender, polyol, catalyst, tartaric acid, pH regulator, deionized water, acetone, flame retardant, lubricant, leveling agent, defoamer, antioxidant, anti-ultraviolet agent, functional filler; The diisocyanate is an aliphatic diisocyanate or a mixed diisocyanate formed by an aliphatic diisocyanate and an aromatic diisocyanate; The chain extender is composed of 2,2-dimethylol propionic acid and small molecule diol; The small molecule diol is at least one of ethylene glycol, propylene glycol, butanediol, pentanediol, 3-methyl-1,5-pentanediol, and hexanediol; The polyol is a slightly branched polyester diol with a molecular weight of 2000-5000 or a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polyether diol and / or a polycarbonate diol with a molecular weight of 1000-2000; The ratio of the total mass of the diisocyanate and the chain extender to the total mass of the polyol, the diisocyanate and the chain extender is (28-35):100; The molar ratio of the molar amount of -NCO in the diisocyanate to the sum of the molar amount of -OH in the chain extender and the molar amount of -OH in the polyol (1.05-1.40): 1.0; The pH regulator is an alcohol amine or ethylenediamine; The catalyst is organic tin or organic bismuth; The lubricant is polyethylene wax and / or stearate; The leveling agent is an organic silicon leveling agent; The defoaming agent is at least one of TEGO Airex 901W, TEGO Foamex 1488, and TEGO Foamex 3062; The antioxidant is composed of at least one of antioxidant 1010, antioxidant 1098, antioxidant 1024, and antioxidant BHT and at least one of antioxidant 168, TPP, and TNPP; The anti-ultraviolet agent is at least one of UV-320, UV-326, UV-327, and UV-328.

2. The explosion-proof oil for preventing paper from bursting according to claim 1, characterized in that: The flame retardant is a reactive flame retardant, and the reactive flame retardant includes N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, and the molar ratio of the molar amount of -NCO in the diisocyanate to the molar amount of -OH in the chain extender, the molar amount of -OH in the polyol, and the molar amount of -OH in the reactive flame retardant is (1.05-1.40): 1.0, and the added amount of the N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester is equal to 0.5-2.0wt% of the total mass of the diisocyanate, the chain extender, the polyol, and the N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester.

3. The explosion-proof oil for preventing paper from bursting according to claim 2, characterized in that: The diisocyanate is composed of isophorone diisocyanate IPDI and carbodiimide modified MDI in a molar ratio of (65-80):(20-35).

4. The explosion-proof oil for preventing paper from bursting according to claim 3, characterized in that: The micro-branched polyester diol is prepared from 1,6-hexanedioic acid, 1,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol, 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and tetraisopropyl titanate; the ratio of the molar amount of carboxyl groups in the 1,6-hexanedioic acid to the total molar amount of hydroxyl groups in the 1,2,3,4-butanetetrol, the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and the 3-methyl-1,5-pentanediol is 1:(1.06-1.12); the ratio of the mass of the tetraisopropyl titanate to the mass of the 1,6-hexanedioic acid is 1:(400-1200).

5. The explosion-proof oil for preventing paper from bursting according to claim 4, characterized in that: The preparation method of the micro-branched polyester diol is as follows: first, 4-8 parts by weight of 3,3,3-trifluoropropylmethyldimethoxysilane and 100 parts by weight of deionized water are uniformly mixed, then 10-25 parts by weight of a 20-30wt% hydrochloric acid aqueous solution is added dropwise, the mixture is stirred uniformly, the temperature is raised to 60-85° C., and the mixture is stirred for reaction for 10-15 minutes, 100 parts by weight of toluene is added to extract the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate, and the obtained supernatant is the 3,3,3-trifluoropropylmethyldimethoxysilane hydrolyzate toluene solution, and then the obtained supernatant is added to a reactor, 10-20 parts of a DMF solvent is added to mix uniformly, and then 1,6-hexanodioic acid, 1 ,2,3,4-butanetetrol, 3-methyl-1,5-pentanediol and tetraisopropyl titanate are mixed evenly and heated to 130-135.0℃, react until water is discharged, then heated to 220-230℃, transesterify for 120-160min, detect the acid value, if the acid value is >20mgKOH / g, continue the transesterify for 10min and then detect the acid value, repeat the above operation until the acid value is ≤20mgKOH / g, finally evacuate to the pressure in the reactor ≤100Pa, continue the reaction for 10-25min, detect the hydroxyl value of the material in the reactor, the hydroxyl value is 20.0-55.0mgKOH / g, flush with nitrogen to restore normal pressure, cool to room temperature in a water bath, and fill and collect to obtain slightly branched polyester diol.

6. The explosion-proof oil for preventing paper from bursting according to claim 4, characterized in that: The polyol is a mixed polyol formed by a slightly branched polyester diol with a molecular weight of 2000-5000 and a polycarbonate diol with a molecular weight of 1000-2000; the polycarbonate diol is polycaprolactone hexamethylene carbonate diol and / or polycarbonate 3-methyl 1,5 pentanediol-1,6-hexanediol ester diol.

7. The explosion-proof oil for preventing paper from bursting according to claim 6, characterized in that: The polyol is composed of a slightly branched polyester diol with a molecular weight of 4000 and polycarbonate 3-methyl 1,5-pentanediol-1,6-hexanediol ester diol C-2020 with a molecular weight of 2000 in a mass ratio of (85-90):(10-15).

8. The explosion-proof oil for preventing paper from bursting according to claim 6, characterized in that: The functional filler comprises at least one of nanocellulose, boron nitride whiskers and hydroxylated graphene in combination with nanosilicon dioxide; the mass of the functional filler is equal to 0.5-5wt% of the total mass of the diisocyanate, the chain extender and the polyol.

9. The explosion-proof oil for preventing paper from bursting according to claim 8, characterized in that: The invention comprises the following raw materials in parts by weight: 144.9-177.8 parts of isophorone diisocyanate IPDI, 50-100 parts of carbodiimide modified MDI, 25-60 parts of 2,2-dihydroxymethyl propionic acid, 20-60 parts of 3-methyl-1,5-pentanediol, 600-2000 parts of slightly branched polyester diol, 100-600 parts of polycarbonate diol, 0.5-0.75 parts of Catalyst - dibutyltin dilaurate, 7-25 parts of tartaric acid, 20-60 parts of dimethylethanolamine, 1500-2500 parts of deionized water, 400-800 parts of acetone, 10-25 parts of flame retardant, 5-25 parts of lubricant, 5-25 parts of leveling agent, 5-25 parts of defoaming agent, 5-25 parts of antioxidant, 5-25 parts of anti-ultraviolet agent, 10-80 parts of functional filler.

10. A method for preparing the explosion-proof oil for preventing paper from bursting according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, preparation of slightly branched polyester diol; Step 2, adding the slightly branched polyester diol in step 1 to a reaction kettle, vacuum dehydrating for 1-2 hours, then adding accurately measured diisocyanate, other polyols, antioxidants, anti-ultraviolet agents, and catalysts, mixing evenly, reacting at 90-95° C. for 2-3 hours, cooling to 70-80° C., adding chain extenders and flame retardants, reacting for 45-60 minutes, then adding accurately measured tartaric acid, maintaining the temperature at 70-80° C. for 20-45 minutes, adding acetone to dilute the system to a viscosity of 2500-5000 mPa·s, cooling to 40-45° C., adding a pH regulator and reacting for 3-5 minutes to obtain a semi-finished polyurethane resin; Step three, after adding deionized water, high-speed shear emulsification treatment is carried out for 5-10 minutes, the high-speed shear speed is 2750-3200rpm, and then accurately measured lubricants, leveling agents, defoaming agents, and functional fillers are added, and stirred at 600-800rpm for 5-15min, then reduced to 200-400rpm and stirred for 15-30min, and acetone is removed by distillation to obtain the finished product - water-based polyurethane explosion-proof oil.

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