High-temperature-resistant polyester spinning oil agent, preparation method and application thereof

Abstract

The application discloses a high-temperature-resistant polyester spinning oil agent and a preparation method and application thereof, and belongs to the technical field of spinning oil agents.The high-temperature-resistant polyester spinning oil agent comprises the following raw materials in mass parts: a smoothing agent 30-70 parts, an emulsifier 26-45 parts, an antistatic agent 2-5 parts, a dilution solvent 8-30 parts, an antioxidant 0.2-0.6 parts, a pH regulator 0.2-0.8 parts and water 0.2-1.0 part; the smoothing agent comprises at least one of polyglycerol ricinoleate and pentaerythritol oleate; and the emulsifier comprises at least one of castor oil polyoxyethylene ether, polyoxyethylene ether dioleate, polyoxyethylene ether monooleate and sorbitan fatty acid ester.The high-temperature-resistant polyester spinning oil agent has the advantages of small volatilization amount, small smoke, excellent high-temperature-resistant decomposition performance, effective coking reduction, and improved stability and quality of polyester fibers under high-speed spinning.

Description

Technical Field

[0001] This invention relates to the field of spinning oil technology, and in particular to a high-temperature resistant polyester spinning oil, its preparation method, and its application. Background Technology

[0002] Polyester industrial yarn, as an important synthetic fiber material, is widely used in tires, conveyor belts, safety belts, industrial ropes, and other fields. Polyester spinning oil is an indispensable auxiliary agent in the polyester yarn processing, playing a role in lubrication, antistatic properties, and reducing friction between the fiber and equipment, thereby ensuring the smooth progress of the spinning process. Modern spinning processes have spinning speeds exceeding 5000 m / min and stretching and heat setting temperatures reaching over 220℃, which places high demands on the high-temperature resistance of spinning oils.

[0003] However, traditional polyester spinning oils have poor high-temperature resistance. On the one hand, they easily decompose at high temperatures, generating small molecule volatiles and tar-like polymers, producing excessive fumes that affect the workshop environment and cause air pollution, failing to meet environmental protection requirements. On the other hand, the oil can coke on the hot oil roller, resulting in insufficient lubrication. This leads to problems such as fuzzing, tangling, and breakage of polyester fibers, requiring frequent cleaning, which is time-consuming and labor-intensive. This seriously affects the stability and quality of polyester fibers under high-speed spinning and reduces spinning efficiency.

[0004] Therefore, how to provide a high-temperature resistant polyester spinning oil is an urgent problem to be solved in this field. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this invention provides a high-temperature resistant polyester spinning oil, its preparation method, and its application. The high-temperature resistant polyester spinning oil of this invention exhibits low volatile content and minimal smoke at high temperatures, demonstrating excellent thermal stability.

[0006] The technical solution of the present invention is as follows:

[0007] The first aspect of this invention protects a high-temperature resistant polyester spinning oil agent, comprising the following raw materials in parts by weight: 30-70 parts of smoothing agent, 26-45 parts of emulsifier, 2-5 parts of antistatic agent, 8-30 parts of diluent, 0.2-0.6 parts of antioxidant, 0.2-0.8 parts of pH adjuster, and 0.2-1.0 parts of water;

[0008] The smoothing agent includes at least one of polyglycerol ricinoleate and pentaerythritol oleate;

[0009] The emulsifier includes at least one of castor oil polyoxyethylene ether, polyoxyethylene ether dioleate, polyoxyethylene ether monooleate, and sorbitan fatty acid ester.

[0010] Preferably, the smoothing agent comprises 10-30 parts of polyglycerol ricinoleate and 20-40 parts of pentaerythritol oleate.

[0011] Preferably, the degree of polymerization of glycerol in the polyglycerol ricinoleate is 2 to 10.

[0012] Preferably, the emulsifier comprises 10-15 parts castor oil polyoxyethylene ether, 10-15 parts polyoxyethylene ether dioleate, 2-5 parts polyoxyethylene ether monooleate, and 4-10 parts dehydrated sorbitan fatty acid ester.

[0013] Preferably, the molar number of oxidized olefins in the castor oil polyoxyethylene ether is 10 to 100.

[0014] Preferably, the sorbitan fatty acid ester includes at least one of sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate, sorbitan sesquioleate, sorbitan monopalmitate, and sorbitan monolaurate.

[0015] Preferably, the antistatic agent comprises potassium salt of C12-14 alcohol phosphate;

[0016] And / or, the diluting solvent includes a low-viscosity mineral oil; the low-viscosity mineral oil has a viscosity of no more than 10 mPa·s at 25°C;

[0017] And / or, the antioxidant includes triphenyl phosphite;

[0018] And / or, the pH adjuster includes at least one of acetic acid, phosphoric acid, disodium hydrogen phosphate, citric acid, and isocitric acid.

[0019] The second aspect of this invention protects a method for preparing the high-temperature resistant polyester spinning oil described in the first aspect, comprising the following steps:

[0020] S1. Add the antioxidant of the specified amount to the smoothing agent of the specified amount, and stir evenly to obtain mixture 1;

[0021] S2. Mix the antistatic agent and emulsifier A in the specified amount according to the formula, and stir evenly to obtain mixture 2;

[0022] S3. Mix the prescribed amount of diluent, the remaining emulsifier, the prescribed amount of water, mixture 1, and mixture 2, and stir evenly to obtain mixture 3.

[0023] S4. Adjust the pH of mixture 3 to 6-8 using the pH adjuster, filter, and take the filtrate to obtain a high-temperature resistant polyester spinning oil.

[0024] Preferably, in step S1, the temperature of the uniform stirring is 70-80°C, the speed of the uniform stirring is 100-400 rpm, and the time of the uniform stirring is 20-40 min.

[0025] And / or, in step S1, the smoothing agent comprises the polyglycerol ricinoleate and the pentaerythritol oleate;

[0026] And / or, in step S2, the emulsifier A comprises polyoxyethylene ether dioleate;

[0027] And / or, in step S2, the temperature of the uniform stirring is 40-80°C, the speed of the uniform stirring is 200-500 rpm, and the time of the uniform stirring is 50-70 min;

[0028] And / or, in step S3, the remaining emulsifiers include castor oil polyoxyethylene ether, polyoxyethylene ether monooleate and dehydrated sorbitan fatty acid ester;

[0029] And / or, in step S3, the temperature of the uniform stirring is 20-40°C, the speed of the uniform stirring is 300-500 rpm, and the time of the uniform stirring is 50-70 min.

[0030] The third aspect of this invention protects the application of a high-temperature resistant polyester spinning oil in the preparation of polyester yarn, wherein the high-temperature resistant polyester spinning oil is the high-temperature resistant polyester spinning oil described in the first aspect, and / or the high-temperature resistant polyester spinning oil obtained by the preparation method described in the second aspect.

[0031] The beneficial technical effects of this invention are as follows:

[0032] The high-temperature resistant polyester spinning oil of the present invention uses polyglycerol castor oil ester and pentaerythritol oleate as a smoothing agent, and is further compounded with emulsifiers such as castor oil polyoxyethylene ether, which effectively improves the temperature resistance of the spinning oil. It has low volatility and low smoke at 250°C, and has excellent high-temperature decomposition resistance. At the same time, it can also effectively reduce coking, thereby improving the stability and quality of polyester fibers under high-speed spinning and increasing spinning efficiency. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the embodiments.

[0034] A high-temperature resistant polyester spinning oil agent comprises the following raw materials in parts by weight: 30-70 parts of smoothing agent, 26-45 parts of emulsifier, 2-5 parts of antistatic agent, 8-30 parts of diluent, 0.2-0.6 parts of antioxidant, 0.2-0.8 parts of pH adjuster, and 0.2-1.0 parts of water;

[0035] The smoothing agent includes at least one of polyglycerol ricinoleate and pentaerythritol oleate;

[0036] The emulsifier includes at least one of castor oil polyoxyethylene ether, polyoxyethylene ether dioleate, polyoxyethylene ether monooleate, and sorbitan fatty acid ester.

[0037] In some embodiments, the smoothing agent comprises 10 to 30 parts of polyglycerol ricinoleate and 20 to 40 parts of pentaerythritol oleate.

[0038] Polyglycerol ricinoleate contains a polyhydroxyl structure, enabling it to form strong hydrogen bonds, making the oil less prone to decomposition or volatilization at high temperatures. Polyglycerol ricinoleate and pentaerythritol oleate have excellent compatibility; the exposed hydrophilic hydroxyl groups of polyglycerol ricinoleate help pentaerythritol oleate disperse better, and it also has better solubility for polar surfactants, compensating for the insufficient solubility of pentaerythritol oleate for polar substances. Furthermore, the polar groups of polyglycerol ricinoleate can disperse oxidized aggregates, reducing difficult-to-clean coking products, thus reducing issues such as fuzzing, entanglement, and breakage in polyester fibers, ensuring the stability and quality of polyester fibers during high-speed spinning. The compounding of polyglycerol ricinoleate and pentaerythritol oleate can form a dense molecular film on the fiber surface, which is not easily detached or volatilized during high-temperature stretching and heat setting, reducing oil decomposition and fiber damage caused by high-temperature friction. It also effectively reduces friction and static electricity accumulation, thereby ensuring the smoothness and stability of polyester fibers.

[0039] Furthermore, the free radicals generated by the oil can be captured by the hydroxyl groups of polyglycerol, interrupting the oxidation process and slowing down the oxidation chain reaction of the oil at high temperatures. Simultaneously, the stereostructure of pentaerythritol can hinder the penetration of oxygen molecules. The combination of these two factors significantly delays the oxidative deterioration of the oil, making it less prone to chain breakage and thermal decomposition. Therefore, compared to single-element smoothing agent formulations that are prone to volatility and decomposition at high temperatures, the combination of polyglycerol ricinoleate and pentaerythritol oleate complements each other, effectively improving the thermal stability of the oil and its adhesion to fibers, thereby ensuring the process stability of high-temperature polyester spinning.

[0040] In addition, polyglycerol ricinoleate also has certain emulsifying properties, which can reduce the difficulty of emulsification to a certain extent, reduce the amount of emulsifier used in spinning oil formulations, and reduce costs.

[0041] The polyglycerol ricinoleate is obtained by esterification of ricinoleic acid and polyglycerol; the polyglycerol is obtained by dehydration polymerization of glycerol. In some embodiments, the degree of polymerization of glycerol in the polyglycerol ricinoleate is 2-10, preferably 3-10, and more preferably 5-10. Selecting a polyglycerol ricinoleate with a high degree of polymerization can improve molecular stability, reduce volatilization and decomposition at high temperatures, and the increased number of hydroxyl groups can enhance intermolecular interactions, helping to form a more robust molecular film, reducing film rupture caused by friction and high temperatures, thereby maintaining the continuous lubricating effect of the oil.

[0042] In some embodiments, the emulsifier comprises 10-15 parts castor oil polyoxyethylene ether, 10-15 parts polyoxyethylene ether dioleate, 2-5 parts polyoxyethylene ether monooleate, and 4-10 parts sorbitan fatty acid ester.

[0043] The polyoxyethylene ether dioleate is obtained by esterification of two molecules of oleic acid with polyethylene glycol. In some embodiments, the degree of polymerization of polyethylene glycol is 5 to 15.

[0044] The polyoxyethylene ether monooleate is obtained by esterification of one molecule of oleic acid with polyethylene glycol. In some embodiments, the degree of polymerization of polyethylene glycol is 5 to 15.

[0045] Castor oil polyoxyethylene ether is obtained by an addition reaction of castor oil and ethylene oxide, wherein the molar number of ethylene oxide added is the same as the molar number of olefin oxides in the castor oil polyoxyethylene ether. In some embodiments, the molar number of olefin oxides in the castor oil polyoxyethylene ether is 10 to 100; preferably, the molar number of olefin oxides is 10 to 70; more preferably, the molar number of olefin oxides is 10 to 50, to reduce the risk of thermal decomposition and chain breakage and improve its thermal stability.

[0046] Polyoxyethylene chains are prone to free radical oxidation at high temperatures, generating small molecules that either dissipate or coke. The hydroxyl groups of polyglycerol ricinoleate can capture these free radicals, blocking the oxidation chain reaction. Furthermore, the hydroxyl groups of polyglycerol ricinoleate can combine with the ether oxygen bonds of castor oil polyoxyethylene ether, polyoxyethylene ether dioleate, and polyoxyethylene ether monooleate, forming an intermolecular hydrogen bond network that improves the overall thermal stability of the spinning oil and increases its decomposition temperature.

[0047] In the following embodiments of the present invention: castor oil polyoxyethylene ether (20) refers to an average of 20 ethylene oxide molecules added to each castor oil molecule; that is, the average number of moles of oxidized olefins in each mole of castor oil polyoxyethylene ether is 20. Polyoxyethylene ether monooleate (10) refers to a degree of polymerization of polyethylene glycol of 10 in polyoxyethylene ether monooleate. Polyoxyethylene ether dioleate (10) refers to a degree of polymerization of polyethylene glycol of 10 in polyoxyethylene ether dioleate.

[0048] All raw materials used in the following embodiments of the present invention are commercially available: diglycerol ricinoleate and tetraglycerol ricinoleate were purchased from Shandong Binzhou Jinsheng New Material Technology Co., Ltd.; pentaerythritol oleate was purchased from Shandong Fangda Technology Co., Ltd.; castor oil polyoxyethylene ether (20), polyoxyethylene ether monooleate (10), and polyoxyethylene ether dioleate (10) were all purchased from Linyi Lusen Chemical Co., Ltd.; sorbitan monooleate, sorbitan monopalmitate, and sorbitan monolaurate were all purchased from BASF; n-dodecane was purchased from Shanghai TCI Chemical Industry Development Co., Ltd.; potassium laurate phosphate was purchased from Taiyuan Chemical Industry Group Co., Ltd.; and triphenyl phosphite was purchased from Shanghai Bangcheng Chemical Co., Ltd.

[0049] Example 1

[0050] A high-temperature resistant polyester spinning oil comprises the following raw materials in parts by weight: 35 parts pentaerythritol oleate, 15 parts diglycerol castor oil oleate, 10 parts castor oil polyoxyethylene ether (20), 3 parts polyoxyethylene ether monooleate (10), 10 parts polyoxyethylene ether dioleate (10), 4 parts dehydrated sorbitan monooleate, 12 parts n-dodecane, 2 parts potassium lauryl phosphate, 0.5 parts triphenyl phosphite, 0.3 parts deionized water, and 0.3 parts citric acid.

[0051] A method for preparing a high-temperature resistant polyester spinning oil includes the following steps:

[0052] S1. Mix the pentaerythritol oleate and diglycerol ricinoleate according to the formula, add the triphenyl phosphite according to the formula, and stir evenly at 300 rpm for 30 min at 75°C to obtain mixture 1.

[0053] S2. Mix the potassium lauryl phosphate and polyoxyethylene ether dioleate according to the formula, and stir evenly at 300 rpm for 60 min at 70°C to obtain mixture 2.

[0054] S3. The castor oil polyoxyethylene ether (20), polyoxyethylene ether monooleate (10), dehydrated sorbitan monooleate, n-dodecane, deionized water, mixture 1, and mixture 2 are uniformly stirred at 350 rpm for 60 min at 30°C to obtain mixture 3.

[0055] S4. Adjust the pH of mixture 3 to 6-8 with the prescribed amount of citric acid, filter, and take the filtrate to obtain high-temperature resistant polyester spinning oil.

[0056] Example 2

[0057] A high-temperature resistant polyester spinning oil agent, the raw materials are basically the same as those in Example 1, the only difference being that diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate.

[0058] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that in step S1, diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate.

[0059] Example 3

[0060] A high-temperature resistant polyester spinning oil has the same raw materials as in Example 1, except that: diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate, and sorbitan monooleate in Example 1 is replaced with sorbitan monopalmitate; the remaining raw materials and contents are the same as in Example 1.

[0061] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that: in step S1, diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate; in step S3, sorbitan monooleate in Example 1 is replaced with sorbitan monopalmitate; the rest is the same as in Example 1.

[0062] Example 4

[0063] A high-temperature resistant polyester spinning oil has the same raw materials as in Example 1, except that: diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate, and sorbitan monooleate in Example 1 is replaced with sorbitan monolaurate; the remaining raw materials and contents are the same as in Example 1.

[0064] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as in Example 1, except that: in step S1, diglycerol ricinoleate in Example 1 is replaced with tetraglycerol ricinoleate; in step S3, sorbitan monooleate in Example 1 is replaced with sorbitan monolaurate; the rest is the same as in Example 1.

[0065] Comparative Example 1

[0066] A high-temperature resistant polyester spinning oil agent, the raw materials are basically the same as those in Example 1, the only difference being that the pentaerythritol oleate in Example 1 is replaced with glyceryl trioleate.

[0067] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that in step S1, pentaerythritol oleate in Example 1 is replaced with glyceryl trioleate.

[0068] Comparative Example 2

[0069] A high-temperature resistant polyester spinning oil has the same raw materials as in Example 1, except that: pentaerythritol oleate in Example 1 is replaced with glyceryl trioleate, and diglyceryl ricinoleate in Example 1 is replaced with tetraglyceryl ricinoleate; the remaining raw materials and contents are the same as in Example 1.

[0070] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that in step S1, pentaerythritol oleate in Example 1 is replaced with glyceryl trioleate, and diglyceryl ricinoleate in Example 1 is replaced with tetraglyceryl ricinoleate; the rest is the same as in Example 1.

[0071] Comparative Example 3

[0072] A high-temperature resistant polyester spinning oil has the same raw materials as in Example 1, except that 35 parts of pentaerythritol oleate and 15 parts of diglycerol ricinoleate in Example 1 are replaced with 50 parts of pentaerythritol oleate.

[0073] In this comparative example, the high-temperature resistant polyester spinning oil comprises the following raw materials in parts by weight: 50 parts pentaerythritol oleate, 10 parts castor oil polyoxyethylene ether (20), 3 parts polyoxyethylene ether monooleate (10), 10 parts polyoxyethylene ether dioleate (10), 4 parts dehydrated sorbitan monooleate, 12 parts n-dodecane, 2 parts potassium lauryl phosphate, 0.5 parts triphenyl phosphite, 0.3 parts deionized water, and 0.3 parts citric acid.

[0074] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as in Example 1, except that in step S1, 35 parts of pentaerythritol oleate and 15 parts of diglycerol ricinoleate in Example 1 are replaced with 50 parts of pentaerythritol oleate; the rest is the same as in Example 1.

[0075] Comparative Example 4

[0076] A high-temperature resistant polyester spinning oil has the same raw materials as in Example 1, except that 35 parts of pentaerythritol oleate and 15 parts of diglycerol ricinoleate in Example 1 are replaced with 50 parts of diglycerol ricinoleate.

[0077] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as in Example 1, except that in step S1, 35 parts of pentaerythritol oleate and 15 parts of diglycerol ricinoleate in Example 1 are replaced with 50 parts of diglycerol ricinoleate; the rest is the same as in Example 1.

[0078] Comparative Example 5

[0079] A high-temperature resistant polyester spinning oil agent, with the same raw materials as in Example 1, except that diglycerol ricinoleate in Example 1 is replaced with glycerol trioleate.

[0080] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that in step S1, diglycerol ricinoleate in Example 1 is replaced with glycerol trioleate.

[0081] Comparative Example 6

[0082] A high-temperature resistant polyester spinning oil agent, with the same raw materials as in Example 1, except that diglycerol ricinoleate in Example 1 is replaced with pentaerythritol stearate.

[0083] A method for preparing a high-temperature resistant polyester spinning oil is basically the same as that in Example 1, except that in step S1, diglycerol castor oil ester in Example 1 is replaced with pentaerythritol stearate.

[0084] Test case

[0085] (1) Appearance and stability testing

[0086] The appearance and stability of the high-temperature resistant polyester spinning oils prepared in the above examples and comparative examples were tested using a multiplex light stability analyzer. The test results are shown in the table below.

[0087] Table 1: Appearance and stability of the above embodiments and comparative examples

[0088] serial number Crude oil appearance Crude oil stability 10% emulsion appearance 10% Emulsion Stability Example 1 ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ Example 2 ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ Example 3 ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆☆ Example 4 ☆☆☆☆☆ ☆☆☆☆☆ ☆☆☆☆ ☆☆☆☆ Comparative Example 1 ☆☆☆☆ ☆☆☆☆ ☆☆☆☆ ☆☆☆ Comparative Example 2 ☆☆☆ ☆☆☆ ☆☆☆☆ ☆☆☆☆ Comparative Example 3 ☆☆ ☆☆ ☆☆ ☆ Comparative Example 4 ☆☆☆☆☆ ☆☆☆☆ ☆☆☆☆ ☆☆☆☆☆ Comparative Example 5 ☆☆☆ ☆☆ ☆☆☆ ☆☆ Comparative Example 6 ☆☆ ☆☆ ☆ ☆

[0089] The crude oil referred to here is the high-temperature resistant polyester spinning oil prepared in the above embodiments and comparative examples.

[0090] The 10% emulsion refers to an emulsion prepared by adding water to the oil to form an oil content of 10 wt%.

[0091] The criteria for judging the appearance of crude oil are as follows:

[0092] 1 star: cloudy; 2 stars: slightly cloudy; 3 stars: relatively clear; 4 stars: clear; 5 stars: very clear.

[0093] The criteria for judging the stability of crude oil are as follows:

[0094] 1 star: Separates quickly; 2 stars: Does not separate within 1 day; 3 stars: Does not separate within 7 days; 4 stars: Does not separate within 30 days; 5 stars: Stable within 1 year.

[0095] The criteria for judging the appearance of emulsions are as follows:

[0096] 1 star: White with no blue light; 2 stars: White with a slight blue light; 3 stars: White with blue light; 4 stars: Pale white with blue light; 5 stars: Pale white with plenty of blue light.

[0097] The criteria for evaluating emulsion stability are as follows:

[0098] 1 star: Separates quickly; 2 stars: Does not separate within 10 minutes; 3 stars: Does not separate within 2 hours; 4 stars: Very stable within 2 hours; 5 stars: Very stable within 1 day.

[0099] Comparing Comparative Examples 1 and 2, 3 and 4, and 5 and 6 with Examples 1 and 2, and referring to Table 1, it can be seen that compared to: Comparative Examples 1 and 2 using a combination of polyglycerol ricinoleate and other fatty acid esters (glycerol trioleate) as a smoothing agent; Comparative Examples 3 and 4 using only pentaerythritol oleate or polyglycerol ricinoleate as a smoothing agent; and Comparative Examples 5 and 6 using a combination of pentaerythritol oleate and other fatty acid esters as a smoothing agent; the crude oil appearance and stability, as well as the emulsion appearance and stability of Examples 1 and 2 using a combination of polyglycerol ricinoleate and pentaerythritol oleate as a smoothing agent are better. This indicates that using a combination of polyglycerol ricinoleate and pentaerythritol oleate as a smoothing agent can significantly improve the appearance and stability of polyester spinning oil.

[0100] (2) Temperature resistance test

[0101] A mixture of 10 parts castor oil polyoxyethylene ether (20) and 50 parts diglycerol castor oil ester was used as sample 1, and the temperature resistance of 60 parts castor oil polyoxyethylene ether (20) was used as sample 2. The temperature resistance of sample 1 and sample 2 was tested using a TGA thermogravimetric analyzer, and the test results are shown in the table below.

[0102] Table 2: Temperature Resistance Test Data for Sample 1 and Sample 2

[0103]

[0104] As can be seen from Table 2, compared with Sample 2, Sample 1, which is prepared by compounding castor oil polyoxyethylene ether (20) and diglycerol ricinoleate, has less volatilization at 220℃, 230℃, 240℃ and 250℃, indicating that the compounding of castor oil polyoxyethylene ether and polyglycerol ricinoleate can significantly improve the high temperature decomposition resistance of the sample.

[0105] The temperature resistance of the high-temperature resistant polyester spinning oils prepared in the above examples and comparative examples was tested using a TGA thermogravimetric analyzer. The test results are shown in the table below.

[0106] Table 3: Temperature Resistance Performance Test Data of the Above Examples and Comparative Examples

[0107]

[0108] As shown in Table 3, the spinning oils prepared in Examples 1-4 all exhibited low volatilization and minimal weight loss at 250°C, indicating that the spinning oils prepared using the raw materials of this invention possess excellent resistance to high-temperature decomposition. Furthermore, the volatilization rate in Example 2 was lower than that in Example 1, demonstrating that selecting a high-polymerization-degree polyglycerol ricinoleate can enhance molecular stability and reduce volatilization and decomposition of the spinning oil at high temperatures.

[0109] Comparing Comparative Examples 1-6 with Examples 1 and 2, and referring to Table 3, it can be seen that the spinning oil prepared in Examples 1 and 2 has a lower volatile content than the spinning oil prepared in Comparative Examples 1-6. This indicates that compared to: using polyglycerol ricinoleate in combination with other fatty acid esters as a smoothing agent, or using only pentaerythritol oleate or polyglycerol ricinoleate as a smoothing agent, or using pentaerythritol oleate in combination with other fatty acid esters as a smoothing agent, the present invention uses polyglycerol ricinoleate in combination with pentaerythritol oleate as a smoothing agent, which can effectively improve the temperature resistance of the spinning oil.

[0110] (3) PM2.5 smoke generation performance test

[0111] The PM2.5 smoke emission performance of the above embodiments and comparative examples was tested using the following methods, and the test results are shown in the table below.

[0112] Test method: The spinning oil in the above examples and comparative examples was heated to 250°C and maintained for 3 minutes to cause pyrolysis and generate smoke. The PM2.5 smoke concentration was measured by optical analysis.

[0113] Table 4: PM2.5 Smoke Emission Performance Test Data of the Above Examples and Comparative Examples

[0114]

[0115] The highest point of smoke at 250℃ mentioned in the table refers to the value at which the smoke concentration was highest during the detection process; the average value refers to the average value of the smoke concentration data during the detection process.

[0116] As can be seen from Table 4, the smoke from the spinning oils in Examples 1-4 is significantly less than that from the spinning oils in Comparative Examples 1-6, indicating that the spinning oils prepared by the method of the present invention produce less smoke at high temperatures and have good thermal stability.

[0117] As can be seen from Tables 1, 3 and 4, Comparative Example 4, which uses only polyglycerol ricinoleate as a smoothing agent, has good appearance and stability, but poor temperature resistance and produces a lot of smoke at high temperatures; Comparative Example 6, which uses a combination of pentaerythritol oleate and pentaerythritol stearate as a smoothing agent, has less volatilization at high temperatures, but poor appearance and stability; the overall performance of both is worse than that of Examples 1-4, and they cannot meet the production requirements of polyester filament.

[0118] Combining Tables 1, 3, and 4, it can also be seen that the spinning oil of Example 2 has good appearance and stability, the least amount of volatilization at high temperature, the least amount of weight loss, and the least amount of smoke, indicating that Example 2 has the best overall temperature resistance performance and still has excellent thermal stability at a high temperature of 250℃.

[0119] The above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that are directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A high-temperature resistant polyester spinning oil, characterized in that, The raw materials include the following parts by weight: 30-70 parts of smoothing agent, 26-45 parts of emulsifier, 2-5 parts of antistatic agent, 8-30 parts of diluent, 0.2-0.6 parts of antioxidant, 0.2-0.8 parts of pH adjuster, and 0.2-1.0 parts of water; The smoothing agent is 10-30 parts of polyglycerol ricinoleate and 20-40 parts of pentaerythritol oleate; The degree of polymerization of glycerol in the polyglycerol ricinoleate is 2 to 4. The emulsifier is 10-15 parts castor oil polyoxyethylene ether, 10-15 parts polyoxyethylene ether dioleate, 2-5 parts polyoxyethylene ether monooleate and 4-10 parts dehydrated sorbitan fatty acid ester. The antistatic agent is C12-14 potassium phosphate salt; The antioxidant is triphenyl phosphite.

2. The high-temperature resistant polyester spinning oil agent according to claim 1, characterized in that, The castor oil polyoxyethylene ether contains 10 to 100 moles of oxidized olefins.

3. The high-temperature resistant polyester spinning oil agent according to claim 1, characterized in that, The sorbitan fatty acid esters include at least one of sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate, sorbitan sesquioleate, sorbitan monopalmitate, and sorbitan monolaurate.

4. The high-temperature resistant polyester spinning oil agent according to claim 1, characterized in that, The diluting solvent includes low-viscosity mineral oil; the viscosity of the low-viscosity mineral oil at 25°C is not greater than 10 mPa·s; The pH adjuster includes at least one of acetic acid, phosphoric acid, disodium hydrogen phosphate, citric acid, and isocitric acid.

5. A method for preparing the high-temperature resistant polyester spinning oil agent according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Add the antioxidant of the specified amount to the smoothing agent of the specified amount, and stir evenly to obtain mixture 1; S2. Mix the antistatic agent and emulsifier A in the specified amount according to the formula, and stir evenly to obtain mixture 2; S3. Mix the prescribed amount of diluent, the remaining emulsifier, the prescribed amount of water, mixture 1, and mixture 2, and stir evenly to obtain mixture 3. S4. Adjust the pH of mixture 3 to 6-8 using the pH adjuster, filter, and take the filtrate to obtain a high-temperature resistant polyester spinning oil. In step S2, the emulsifier A is polyoxyethylene ether dioleate; In step S3, the remaining emulsifiers are castor oil polyoxyethylene ether, polyoxyethylene ether monooleate, and sorbitan fatty acid ester.

6. The preparation method according to claim 5, characterized in that, In step S1, the temperature of the uniform stirring is 70~80℃, the speed of the uniform stirring is 100~400rpm, and the time of the uniform stirring is 20~40min. In step S2, the temperature of the uniform stirring is 40~80℃, the speed of the uniform stirring is 200~500rpm, and the time of the uniform stirring is 50~70min. In step S3, the temperature of the uniform stirring is 20~40℃, the speed of the uniform stirring is 300~500rpm, and the time of the uniform stirring is 50~70min.

7. The application of a high-temperature resistant polyester spinning oil in the preparation of polyester yarn, characterized in that, The high-temperature resistant polyester spinning oil is the high-temperature resistant polyester spinning oil according to any one of claims 1-4, or the high-temperature resistant polyester spinning oil prepared by the preparation method according to any one of claims 5-6.

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