High-temperature-resistant polyester spinning oil as well as preparation method and application thereof

Abstract

The invention discloses high-temperature-resistant polyester spinning oil as well as a preparation method and application thereof, and belongs to the technical field of spinning oil. The high-temperature-resistant polyester spinning oil is prepared from the following raw materials in parts by mass: 30 to 70 parts of smoothing agent, 26 to 45 parts of emulsifier, 2 to 5 parts of antistatic agent, 8 to 30 parts of diluting solvent, 0.2 to 0.6 part of antioxidant, 0.2 to 0.8 part of pH regulator and 0.2 to 1.0 part of water, the smoothing agent is prepared from at least one of polyglycerol ricinoleate and pentaerythritol oleate; 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 provided by the invention has the advantages of small volatilization amount at high temperature, small smoke, excellent high-temperature decomposition resistance, effective reduction of coking, and improvement of the stability and quality of polyester fibers under high-speed spinning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinning oil, in particular to a high-temperature-resistant polyester spinning oil and a preparation method and application thereof. BACKGROUND

[0002] As an important synthetic fiber material, polyester industrial yarn is widely used in the fields of tires, conveyor belts, safety belts, industrial ropes, etc. The polyester spinning oil is an indispensable auxiliary agent in the processing of polyester yarn, which plays a role in lubrication, antistatic and reducing the friction between the fiber and the equipment, thereby ensuring the smooth progress of the spinning process. The spinning speed of modern spinning process has exceeded 5000 m / min, and the stretching heat setting temperature is as high as 220℃ or above, which has a higher requirement on the high-temperature resistance of the spinning oil.

[0003] However, the traditional polyester spinning oil has poor high-temperature resistance. On the one hand, it is easy to decompose into small molecule volatile substances and tar-like polymers at high temperature, generating excessive smoke, affecting the workshop environment and causing air pollution, which does not meet the environmental protection requirements; on the other hand, the oil agent will coke on the hot oil roller, resulting in insufficient lubrication, so that the polyester fiber appears hair, winding, broken end and other phenomena, which needs to be cleaned frequently, time-consuming and laborious, seriously affecting the stability and quality of the polyester fiber at high speed spinning, and reducing the spinning efficiency.

[0004] Therefore, how to provide a high-temperature-resistant polyester spinning oil is a problem to be solved in the field. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application provides a high-temperature-resistant polyester spinning oil and a preparation method and application thereof. The high-temperature-resistant polyester spinning oil has less volatile amount and small smoke at high temperature, and has excellent thermal stability.

[0006] The technical scheme of the present application is as follows:

[0007] The present application protects a high-temperature-resistant polyester spinning oil in the first aspect, which comprises the following raw materials by mass: 30-70 parts of smoothing agent, 26-45 parts of emulsifier, 2-5 parts of antistatic agent, 8-30 parts of dilution solvent, 0.2-0.6 parts of antioxidant, 0.2-0.8 parts of pH regulator, and 0.2-1.0 parts of water.

[0008] The smoothing agent comprises at least one of polyglycerol ricinoleate and pentaerythritol oleate.

[0009] The emulsifier comprises 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 polyglyceryl ricinoleate, 20-40 parts of pentaerythritol oleate.

[0011] Preferably, the polyglyceryl ricinoleate has a degree of polymerization of glycerol of 2-10.

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

[0013] Preferably, the castor oil polyoxyethylene ether has a number of moles of oxyalkylene of 10-100.

[0014] Preferably, the sorbitan fatty acid ester comprises 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 C12-14 alcohol phosphate;

[0016] And / or, the dilution solvent comprises low-viscosity mineral oil; the low-viscosity mineral oil has a viscosity of no more than 10 mpa·s at 25℃;

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

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

[0019] The second aspect of the present application protects a preparation method of the high-temperature-resistant polyester spinning oil of the first aspect, comprising the following steps:

[0020] S1, adding a formula amount of the antioxidant to a formula amount of the smoothing agent, uniformly stirring to obtain a mixture 1;

[0021] S2, mixing a formula amount of the antistatic agent with a formula amount of emulsifier A, uniformly stirring to obtain a mixture 2;

[0022] S3, mixing a formula amount of the dilution solvent, a formula amount of the remaining emulsifier, a formula amount of the water, the mixture 1, and the mixture 2, uniformly stirring to obtain a mixture 3;

[0023] S4, adjusting the pH of the mixture 3 to 6-8 with the pH regulator, filtering, and taking the filtrate to obtain the high-temperature-resistant polyester spinning oil.

[0024] Preferably, in step S1, the temperature of the uniform stirring is 70-80 DEG C, the rotating 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 polyglyceryl ricinoleate and the pentaerythritol oleate;

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

[0027] And / or, in step S2, the temperature of the uniform stirring is 40-80 DEG C, the rotating 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 emulsifier comprises castor oil polyoxyethylene ether, polyoxyethylene ether mono-oleate and sorbitan fatty acid ester;

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

[0030] The application also discloses application of the high-temperature-resistant polyester spinning oil in preparation of polyester yarn.

[0031] The application has the beneficial technical effects that:

[0032] The high-temperature-resistant polyester spinning oil of the application uses polyglyceryl ricinoleate and pentaerythritol oleate as the smoothing agent, and further uses emulsifiers such as castor oil polyoxyethylene ether, so that the temperature resistance of the spinning oil is effectively improved, the volatilization amount and smoke of the spinning oil are small at 250 DEG C, the high-temperature decomposition resistance is excellent, and the coking is effectively reduced, so that the stability and quality of the polyester fiber under high-speed spinning are improved, and the spinning efficiency is improved. DETAILED DESCRIPTION

[0033] The application will be described in detail below with reference to the embodiments.

[0034] The high-temperature-resistant polyester spinning oil comprises the following raw materials in mass parts: smoothing agent 30-70 parts, emulsifier 26-45 parts, antistatic agent 2-5 parts, dilution solvent 8-30 parts, antioxidant 0.2-0.6 parts, pH regulator 0.2-0.8 parts, and water 0.2-1.0 parts.

[0035] The smoothing agent comprises at least one of polyglycerin ricinoleate, pentaerythritol oleate;

[0036] The emulsifier comprises at least one of polyoxyethylene castor oil ether, polyoxyethylene ether di-oleate, polyoxyethylene ether mono-oleate, sorbitan fatty acid ester.

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

[0038] Polyglycerin ricinoleate contains a polyhydroxy structure, which can form strong hydrogen bonding forces, so that the oil agent is not easy to decompose or volatilize at high temperature. Polyglycerin ricinoleate and pentaerythritol oleate have good compatibility, the hydrophilic exposed hydroxyl group of polyglycerin ricinoleate can help pentaerythritol oleate disperse better, and at the same time has better solubility for polar surfactants, making up for the problem of insufficient solubility of pentaerythritol oleate for polar substances. In addition, the polar group of polyglycerin ricinoleate can disperse the oxidation aggregate, reduce the difficult-to-clean coking products, and reduce the occurrence of hair, winding and broken ends of polyester fibers, so as to ensure the stability and quality of polyester fibers under high-speed spinning. The compounding of polyglycerin ricinoleate and pentaerythritol oleate can form a dense molecular film on the surface of the fiber, which is not easy to fall off or volatilize during high-temperature drawing and heat setting, can reduce the decomposition of the oil agent and the damage of the fiber caused by high-temperature friction, and can effectively reduce the friction and static accumulation, so as to ensure the smoothness and stability of the polyester fiber.

[0039] In addition, the oxidation free radicals generated by the oil agent can be captured by the hydroxyl group of polyglycerin, interrupting the oxidation process and slowing down the oxidative chain reaction of the oil agent at high temperature; at the same time, the stereostructure of pentaerythritol can hinder the penetration of oxygen molecules, and the combination of the two can significantly delay the oxidation and deterioration of the oil agent, so that the oil agent is not easy to break the chain and decompose thermally. Therefore, compared with single smoothing agent formula oil agent which is easy to volatilize and decompose at high temperature, the compounding of polyglycerin ricinoleate and pentaerythritol oleate can effectively improve the thermal stability of the oil agent and its adhesion on the fiber, and further ensure the process stability of polyester high-temperature spinning.

[0040] In addition, polyglycerin ricinoleate also has a certain emulsifying property, which can reduce the emulsification difficulty to a certain extent, reduce the use amount of emulsifier in the spinning oil agent formula, and reduce the cost.

[0041] The polyglyceryl ricinoleate is obtained by esterification of ricinoleic acid and polyglycerol; and the polyglycerol is obtained by dehydration polymerization of glycerol. In some embodiments, the polyglyceryl ricinoleate has a degree of polymerization of glycerol of 2-10, preferably, the degree of polymerization of glycerol is 3-10, and further preferably, the degree of polymerization of glycerol is 5-10. The polyglyceryl ricinoleate with high degree of polymerization can improve the molecular stability, reduce the volatilization and decomposition at high temperature, and the increase in the number of hydroxyl groups can enhance the intermolecular interaction, help to form a more stable molecular film, reduce the film rupture caused by friction and high temperature, and thus maintain the continuous lubricating effect of the oil agent.

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

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

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

[0045] The castor oil polyoxyethylene ether is obtained by addition reaction of castor oil and ethylene oxide, wherein the number of moles of added ethylene oxide is the number of moles of oxyalkylene in the castor oil polyoxyethylene ether. In some embodiments, the number of moles of oxyalkylene in the castor oil polyoxyethylene ether is 10-100; preferably, the number of moles of oxyalkylene is 10-70; and further preferably, the number of moles of oxyalkylene is 10-50, so as to reduce the risk of thermal decomposition and chain scission and improve the thermal stability.

[0046] The polyoxyethylene chain is prone to free radical oxidation at high temperature, generating small molecules that escape or coking, and the hydroxyl groups of the polyglyceryl ricinoleate can capture the generated free radicals and block the oxidation chain reaction. In addition, the hydroxyl groups of the polyglyceryl ricinoleate can combine with the ether oxygen bonds of the castor oil polyoxyethylene ether, the polyoxyethylene ether dioleate, and the polyoxyethylene ether monooleate to form an intermolecular hydrogen bond network, improve the overall thermal stability of the spinning oil agent, and increase the decomposition temperature.

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

[0048] The raw materials used in the following examples of the present invention are all commercially available raw materials: dipolyglycerol ricinoleate and tetrapolyglycerol ricinoleate were purchased from Shandong Binzhou Jinsheng New Materials 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 Tixia Chemical Industry Development Co., Ltd., lauryl alcohol phosphate potassium salt 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 of pentaerythritol oleate, 15 parts of dipolyglycerol ricinoleate, 10 parts of castor oil polyoxyethylene ether (20), 3 parts of polyoxyethylene ether monooleate (10), 10 parts of polyoxyethylene ether dioleate (10), 4 parts of sorbitan monooleate, 12 parts of normal-dodecane, 2 parts of lauryl alcohol potassium phosphate, 0.5 part of triphenyl phosphite, 0.3 part of deionized water, and 0.3 part of citric acid.

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

[0052] S1. Mixing the formulated amounts of pentaerythritol oleate and dipolyglycerol ricinoleate, adding the formulated amount of triphenyl phosphite, and stirring uniformly at 75° C. and 300 rpm for 30 minutes to obtain a mixture 1;

[0053] S2. Mix the formulated amounts of potassium lauryl phosphate and polyoxyethylene ether dioleate, and stir uniformly at 70° C. and 300 rpm for 60 min to obtain mixture 2;

[0054] S3, uniformly stirring the formulated amounts of castor oil polyoxyethylene ether (20), polyoxyethylene ether monooleate (10), sorbitan monooleate, n-dodecane, deionized water, mixture 1, and mixture 2 at 30° C. and 350 rpm for 60 min to obtain mixture 3;

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

[0056] Example 2

[0057] A high-temperature resistant polyester spinning oil, the raw materials of which are basically the same as those in Example 1, except that the diglycerol ricinoleate in Example 1 is replaced by tetraglycerol ricinoleate.

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

[0059] Example 3

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

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

[0062] Example 4

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

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

[0065] Comparative Example 1

[0066] A high-temperature resistant polyester spinning oil, the raw materials of which are basically the same as those in Example 1, except that the pentaerythritol oleate in Example 1 is replaced by glycerol trioleate.

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

[0068] Comparative Example 2

[0069] A high-temperature-resistant polyester spinning oil, which is basically the same as that of Example 1, except that in Example 1, the 35 parts of pentaerythritol oleate and 15 parts of diglycerol ricinoleate are replaced by 50 parts of pentaerythritol oleate.

[0070] A preparation method of a high-temperature-resistant polyester spinning oil, which is basically the same as that of Example 1, except that in step S1, the pentaerythritol oleate in Example 1 is replaced by glyceryl trioleate, and the diglycerol ricinoleate in Example 1 is replaced by tetraglycerol ricinoleate.

[0071] Comparative Example 3

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

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

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

[0075] Comparative Example 4

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

[0077] A preparation method of a high-temperature-resistant polyester spinning oil, which is basically the same as that in Example 1, except that in step S1, the 35 parts of pentaerythritol oleate and 15 parts of dimer glycerol castor oil ester in Example 1 are replaced by 50 parts of dimer glycerol castor oil ester; and the rest is the same as in Example 1.

[0078] Comparative Example 5

[0079] A high-temperature-resistant polyester spinning oil, which is basically the same as that in Example 1, except that the dimer glycerol castor oil ester in Example 1 is replaced by glyceryl trioleate.

[0080] A preparation method of a high-temperature-resistant polyester spinning oil, which is basically the same as that in Example 1, except that in step S1, the dimer glycerol castor oil ester in Example 1 is replaced by glyceryl trioleate.

[0081] Comparative Example 6

[0082] A high-temperature-resistant polyester spinning oil, which is basically the same as that in Example 1, except that the dimer glycerol castor oil ester in Example 1 is replaced by pentaerythritol stearate.

[0083] A preparation method of a high-temperature-resistant polyester spinning oil, which is basically the same as that in Example 1, except that in step S1, the dimer glycerol castor oil ester in Example 1 is replaced by pentaerythritol stearate.

[0084] Test Example

[0085] (1) Appearance and stability detection

[0086] The appearance and stability of the high-temperature-resistant polyester spinning oils prepared in the above examples and comparative examples are detected by using a multiple light stability analyzer, and the detection results are shown in the following table.

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

[0088] No. Crude appearance Crude 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 refers to the high-temperature-resistant polyester spinning oil prepared in the above examples and comparative examples.

[0090] The 10% emulsion refers to an emulsion prepared by adding water to the oil agent, so that the oil agent content is 10 wt%.

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

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

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

[0094] 1 ☆: stratification occurs quickly; 2 ☆: no stratification within 1 day; 3 ☆: no stratification within 7 days; 4 ☆: no stratification within 30 days; 5 ☆: stable within 1 year.

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

[0096] 1 ☆: white without blue light; 2 ☆: white with slight blue light; 3 ☆: white with blue light; 4 ☆: light white with blue light; 5 ☆: light white with plenty of blue light.

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

[0098] 1 ☆: stratification occurs quickly; 2 ☆: no stratification occurs within 10 minutes; 3 ☆: no stratification occurs within 2 hours; 4 ☆: very stable within 2 hours; 5 ☆: very stable within 1 day.

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

[0100] (2) Heat resistance test

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

[0102] Table 2: Temperature resistance test data of sample 1 and sample 2

[0103]

[0104] According to Table 2, compared with sample 2, sample 1 prepared by compounding castor oil polyoxyethylene ether (20) and dipolyglycerol ricinoleate has less volatility at 220°C, 230°C, 240°C and 250°C, indicating that compounding 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 finish prepared in the above examples and comparative examples was detected by a TGA thermal gravimetric analyzer, and the detection results are shown in the following table.

[0106] Table 3: Temperature resistance detection data table of the above examples and comparative examples

[0107]

[0108] As can be seen from Table 3, the spinning finish prepared in Examples 1-4 has less volatile amount and small weight loss change at 250℃, indicating that the spinning finish prepared from the raw material of the application has excellent high-temperature decomposition resistance. The volatile amount of Example 2 is less than that of Example 1, indicating that selecting polyglyceryl ricinoleate with high polymerization degree can improve molecular stability and reduce volatile and decomposition of the spinning finish at high temperature.

[0109] Comparing Comparative Examples 1-6 and Examples 1 and 2, and combining Table 3, it can be seen that the volatile amount of the spinning finish prepared in Examples 1 and 2 is less than that of the spinning finish prepared in Comparative Examples 1-6, indicating that compared with: compounding polyglyceryl ricinoleate with other fatty acid esters as a smoothing agent, or using only pentaerythritol oleate or polyglyceryl ricinoleate as a smoothing agent, or compounding pentaerythritol oleate with other fatty acid esters as a smoothing agent; the application of polyglyceryl ricinoleate and pentaerythritol oleate as a smoothing agent can effectively improve the temperature resistance of the spinning finish.

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

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

[0112] Test method: heat the spinning finish in the above examples and comparative examples to 250℃ and maintain for 3 min to make it pyrolyze to produce smoke, and determine the PM2.5 smoke concentration by optical analysis method.

[0113] Table 4: PM2.5 smoke emission performance test data table of the above examples and comparative examples

[0114]

[0115] The 250℃ smoke maximum point in the table refers to the value when the smoke concentration is 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 of the spinning finish of Examples 1-4 is significantly less than that of Comparative Examples 1-6, indicating that the spinning finish prepared by the method of the application emits less smoke at high temperature and has good thermal stability.

[0117] It can be seen from Tables 1, 3 and 4 that the comparative example 4 using only polyglyceryl ricinoleate as the smoothing agent has good appearance and stability, but poor temperature resistance, and generates more smoke at high temperature; the comparative example 6 using a mixture of pentaerythritol oleate and pentaerythritol stearate as the smoothing agent has less volatile amount at high temperature, but poor appearance and stability; the comprehensive performance of both is poorer than that of the examples 1-4, and cannot meet the production requirements of polyester yarns.

[0118] It can also be seen from Tables 1, 3 and 4 that the spinning finish of the example 2 has good appearance and stability, the least volatile amount, the least weight loss and the least smoke at high temperature, indicating that the comprehensive temperature resistance of the example 2 is the best, and the example 2 still has excellent thermal stability at high temperature of 250°C.

[0119] The above is only the preferred embodiments of the present application, and the present application is not limited to the above examples. It can be understood that other improvements and changes directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present application should be considered to be within the scope of protection of the present application.

Claims

1. A high temperature resistant polyester spinning oil, characterized in that: The method comprises the following raw materials in parts by weight: 30 to 70 parts of a smoothing agent, 26 to 45 parts of an emulsifier, 2 to 5 parts of an antistatic agent, 8 to 30 parts of a diluting solvent, 0.2 to 0.6 parts of an antioxidant, 0.2 to 0.8 parts of a pH regulator, and 0.2 to 1.0 parts of water; The smoothing agent includes at least one of polyglycerol ricinoleate and pentaerythritol oleate; The emulsifier includes at least one of castor oil polyoxyethylene ether, polyoxyethylene ether dioleate, polyoxyethylene ether monooleate, and sorbitan fatty acid ester.

2. The high temperature resistant polyester spinning oil according to claim 1, characterized in that The smoothing agent comprises 10 to 30 parts of polyglycerol ricinoleate and 20 to 40 parts of pentaerythritol oleate.

3. The high temperature resistant polyester spinning oil according to any one of claims 1-2, characterized in that The polymerization degree of glycerol in the polyglycerol ricinoleate is 2-10.

4. The high temperature resistant polyester spinning oil according to claim 1, characterized in that The emulsifier comprises 10 to 15 parts of castor oil polyoxyethylene ether, 10 to 15 parts of polyoxyethylene ether dioleate, 2 to 5 parts of polyoxyethylene ether monooleate, and 4 to 10 parts of sorbitan fatty acid ester.

5. The high temperature resistant polyester spinning oil according to claim 1, characterized in that The molar number of alkylene oxide in the castor oil polyoxyethylene ether is 10 to 100.

6. The high temperature resistant polyester spinning oil according to claim 1, characterized in that 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.

7. The high temperature resistant polyester spinning oil according to claim 1, characterized in that The antistatic agent includes C12-14 alcohol phosphate potassium salt; And / or, the dilution solvent comprises low-viscosity mineral oil; the viscosity of the low-viscosity mineral oil is not greater than 10 mPa·s at 25° C.; and / or, the antioxidant comprises triphenyl phosphite; And / or, the pH adjuster includes at least one of acetic acid, phosphoric acid, disodium hydrogen phosphate, citric acid, and isocitric acid.

8. A method for preparing the high-temperature resistant polyester spinning oil according to any one of claims 1 to 7, characterized in that: The steps include: S1. Add the antioxidant in a formulated amount to the smoothing agent in a formulated amount, and stir evenly to obtain a mixture 1; S2, mixing the antistatic agent in a formula amount with the emulsifier A in a formula amount, and stirring evenly to obtain a mixture 2; S3, mixing the formulated amount of the dilution solvent, the formulated amount of the remaining emulsifier, the formulated amount of water, the mixture 1, and the mixture 2, and stirring uniformly to obtain a mixture 3; S4. Adjust the pH of the mixture 3 to 6-8 with the pH regulator, filter, and collect the filtrate to obtain a high-temperature resistant polyester spinning oil.

9. The preparation method according to claim 8, characterized in that 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; And / or, in step S1, the smoothing agent includes the polyglycerol ricinoleate and the pentaerythritol oleate; And / or, in step S2, the emulsifier A includes polyoxyethylene ether dioleate; 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; And / or, in step S3, the remaining emulsifiers include castor oil polyoxyethylene ether, polyoxyethylene ether monooleate and sorbitan fatty acid ester; And / or, in step S3, the temperature of the uniform stirring is 20-40° C., the rotation speed of the uniform stirring is 300-500 rpm, and the time of the uniform stirring is 50-70 min.

10. Use 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 to 7, and / or the high-temperature resistant polyester spinning oil prepared by the preparation method according to any one of claims 8 to 9.

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