Polyester industrial yarn oiling agent with good anti-coking property and preparation method of polyester industrial yarn oiling agent

Abstract

The invention discloses a polyester industrial yarn oiling agent with good anti-coking property. The polyester industrial yarn oiling agent is prepared from the following raw materials in percentage by mass: 55-60% of neopentyl polyol isostearate; 5%-10% of trimethylolpropane caprylic caprate; 15-25% of an alkylamine coking dispersant; 5-10% of a polyether ester emulsifier; 5-10% of a composite efficient antistatic agent; and 2-5% of a stabilizer. The polyester industrial yarn oiling agent disclosed by the invention is relatively high in oil film strength and high-temperature oxidation resistance, good in fiber wrapping property, good in lubricating property of the oiling agent, good in high-temperature heat resistance and less in smoke, hot roller drafting coking is less when crude oil is used for spinning, the roller cleaning period is greater than or equal to 48h, and the polyester industrial yarn oiling agent has excellent anti-coking dispersing performance.

Description

Technical Field

[0001] The present invention belongs to the field of spinning finishes, and relates to a polyester industrial yarn finish with good anti-coking property and a preparation method thereof. Background Art

[0002] Finishes are the main auxiliaries in the production of polyester industrial yarns, which can effectively improve the friction performance of fibers, prevent or eliminate the accumulation of static electricity, and endow the fibers with properties such as smoothness, bundling, antistatic, and softness, so as to smoothly complete the spinning, drawing, texturing and other processes of polyester fibers. Due to the characteristics of high spinning speed and high drawing and setting temperature in the production of polyester industrial yarns, it is required that the finish has excellent heat-resistant stability, less aldehyde and ketone organic smoke generated by thermal decomposition, good high-temperature stability, no precipitation of high-melting-point components and easily crystallizable components, and less coking substances on the spinning hot roller, thereby reducing fiber breakage, hairiness and even filament entanglement phenomena caused by hot roller coking, prolonging the cleaning cycle of the spinning hot roller, improving the continuity of industrial yarn drawing-winding, and realizing the "safe, stable, long, full, excellent" production of polyester industrial yarns.

[0003] At present, industrial yarn finishes with better thermal stability generally need to be prepared into emulsions for use, with high energy consumption, and the crude oil-based finishes still have certain volatility, contain heavy metal ions and have corrosiveness. During spinning, there are easily phenomena such as hairiness, breakage, blue smoke emission, and hot roller filament entanglement.

[0004] CN111206427A discloses a high-temperature finish for polyester industrial yarns, which has excellent heat-resistant performance, emits less blue smoke during use, and has excellent spinning performance. However, when the finish is used on a large scale, white powder is easily generated during high-temperature drawing, which affects the heat transfer efficiency of the hot roller, reduces the crystallinity of the fibers, and increases fiber breakage and hairiness.

[0005] CN116837495A discloses a polyester industrial yarn finish with less white powder shedding. Using a siloxane-based white powder remover can extremely improve the white powder generated by the friction of the hot roller, and innovatively using Gemini surfactants can, to a certain extent, relieve the coking degree of the hot roller. However, the viscosity of the finish is relatively large, and when the crude oil is used, the wettability of the fibers is poor, and the fiber oiling is uneven. Moreover, the Gemini surfactant raw materials are expensive and the production technical indicators are difficult to control, resulting in filament entanglement on the drawing and setting hot roller during use, which is 25 times that of the same type of imported finishes, and the spinnability of the finish is poor.

[0006] Alkylamine coking dispersants are commonly used as oil additives, playing a role in cleaning and dispersing. In particular, polyetheramine dispersants are a type of olefin compound with a soft polyether backbone and terminated by primary or secondary amine groups. The terminal amino group of polyetheramine is a hydrophilic group. When the polyether end contains a super-strong oil-soluble group and a special backbone structure, polyetheramine can have extremely strong oil solubility, thus exhibiting specific "surface activity". Chinese patent applications CN116284738A and CN116284739A both disclose a synthesis method of polyetheramine (detergent-dispersant). Using polyetheramine as the main active component of gasoline detergents can inhibit the formation of internal deposits in the fuel system, but the actual application field is limited. Moreover, when used as a coking dispersant for chemical fiber oils, the addition amount needs to be significantly increased; and due to the hydrophilic amino group of polyetheramine dispersants being prone to reacting with anionic surfactants to form water-soluble salts, while the main body of the oil agent system is oil-soluble, at this time, a large addition amount of polyetheramine dispersants has poor compatibility with other smoothing agents and non-ionic surfactants, and there are limitations in compatibility.

[0007] To solve the deficiencies of the prior art, the inventors have strived to seek an ideal and reasonable solution to achieve less coking on the hot rollers of polyester industrial yarn oils, having a cleaning and dispersing effect on the initially generated coke scale, thereby extending the hot roller cleaning cycle. Summary of the Invention

[0008] The purpose of the present invention is to solve the technical problems of excessive coking on the hot rollers of existing polyester industrial yarn oils and the cleaning and dispersing of the initially generated coke scale on the hot rollers. The present invention provides a polyester industrial yarn oil with good anti-coking performance, reducing fiber hairiness and breakage, and extending the hot roller cleaning cycle.

[0009] The purpose of the present invention is achieved through the following technical solutions:

[0010] A polyester industrial yarn oil with good anti-coking performance, which is composed of the following raw materials in mass percentages:

[0011]

[0012] Preferably, the polyester industrial yarn oil is composed of the following raw materials in mass percentages:

[0013]

[0014] The purity of the neopentyl polyol isostearate is ≥99%, the acid value is ≤2mgKOH / g, and the hydroxyl value is ≤5mgKOH / g.

[0015] The neopentyl polyol isostearate is selected from at least one of neopentyl glycol diisostearate, pentaerythritol tetraisostearate, trimethylolpropane triisostearate, or dipentaerythritol isostearate. Neopentyl glycol diisostearate, pentaerythritol tetraisostearate, trimethylolpropane triisostearate, and dipentaerythritol isostearate all meet the following criteria: purity ≥ 99%, acid value ≤ 2 mg KOH / g, and hydroxyl value ≤ 5 mg KOH / g.

[0016] The neopentyl polyol isostearate can significantly improve the oil film strength and antioxidant stability of the oil agent, ensure excellent lubrication performance of the oil agent under high-temperature conditions, and reduce the thermal decomposition and coking of the smoothing agent at high temperatures. At the same time, the selected trimethylolpropane octanoate / decanoate has excellent properties such as low viscosity, low volatility, and low carbon residue. It is a highly polar lubricating synthetic ester that has a solubilizing effect on poorly soluble additives and carbon residue to maintain cleanliness.

[0017] The alkylamine coking dispersant is an oil-soluble dispersant with an average molecular weight of 600 - 3000.

[0018] Preferably, the alkylamine coking dispersant is selected from at least one of BASF 3448N (polyisobutenylamine), polyetheramine FL-1000 (Huntsman, nonylphenol polyoxypropylene etheramine), poly(epoxybutene)amine FL2000, alkylphenol formaldehyde resin polyoxyethylene monoamine, alkylphenol formaldehyde resin Mannich amine, monoalkenyl succinimide (T151 dispersant), polyisobutylene bis(succinimide) (T154 dispersant).

[0019] Poly(epoxybutene)amine FL2000 is based on the structure of polyetheramine FL-1000, uses epoxybutane as the polymerization unit, and is formed by fixed-bed hydroamination. The average molecular weight of poly(epoxybutene)amine FL2000 is 2000.

[0020] Alkylphenol formaldehyde resin polyoxyethylene ether monoamine is prepared by using phenolic resin as the initiator, carrying out a condensation reaction with epoxybutane, and then performing hydroamination. Alkylphenol formaldehyde resin polyoxyethylene ether monoamine can be prepared by those skilled in the art according to the prior art such as the applicant's invention CN116284738A.

[0021] Specifically, the alkylphenol formaldehyde resin polyoxyethylene ether monoamine can be selected from polyetheramines MA-223, MA-240, MA-2200, MA-2203ED, MEP-1100, and MEP-1207.

[0022] The alkylphenol formaldehyde resin Mannich amine can be a Mannich amine dispersant with M W w = 1080. The Mannich amine dispersant with Mw = 1080 can be prepared by those skilled in the art according to the prior art such as the applicant's invention patent CN110357990A.

[0023] Alkylamine coking dispersants can effectively disperse the oil coke scale generated by combustion or high-temperature heating, can disperse the hot roll coke scale, and reduce the breakage of fibers. Moreover, polyetheramine dispersants are flexible molecular chains with strong polarity. The hydroxyl and amino groups inside can form hydrogen bond interactions with most substances, thus penetrating into the interior of the coke scale, destroying the adhesion of the coke scale, and causing it to disintegrate layer by layer. At the same time, the molecular chain contains long-chain alkyl groups, making it have relatively strong oil solubility, capable of fully dissolving and stabilizing the high-viscosity and high-density components of the oil agent, and can also easily adhere to the coke scale, helping to interact with it and accelerating the cleaning and dispersing effect. When directly using crude oil, it is necessary to control the viscosity of the oil agent. If the viscosity is too small, the high-speed rotation of the hot roll will cause the crude oil to splash. If the viscosity is too large, the crude oil cannot be evenly coated on the surface of the fiber. Alkylamine coking dispersants are low-viscosity and high-temperature-resistant additives, which can form a protective film on the surface of the hot roll metal, effectively preventing the adhesion of sediments, and the special molecular structure can form a protective layer, thus playing a role in maintaining cleanliness and protection, and fundamentally extending the cleaning cycle of the hot roll.

[0024] The polyether ester emulsifier described is one or a mixture of several of polyethylene glycol oleate, sulfonated castor oil, fatty alcohol polyoxyethylene ether, and propylene glycol block polyether.

[0025] Preferably, the polyethylene glycol oleate is polyethylene glycol 200-1000 dioleate or polyethylene glycol 200-1000 monooleate. Specifically, the polyethylene glycol oleate is polyethylene glycol 200-1000 dioleate or polyethylene glycol 200-1000 monooleate synthesized from polyethylene glycol with Mw = 200-1000 after pre-refining to remove K. + after

[0026] Preferably, the Mw of the propylene glycol block polyether is 2000-4000. The propylene glycol block polyether is polymerized by those skilled in the art according to the prior art, using propylene glycol as the initiator, and the molar ratio of PO (propylene oxide) to EO (ethylene oxide) = 60:40.

[0027] The composite high-efficiency antistatic agent is prepared by mixing an alkyl sulfonate surfactant and an alkyl phosphate salt anionic surfactant in a mass ratio of 1:1-3:1.

[0028] The alkyl sulfonate surfactant is selected from sodium dodecyl sulfonate.

[0029] The alkyl phosphate salt anionic surfactant is selected from potassium hexadecyl phosphate.

[0030] The compounding of alkyl sulfonate surfactants and alkyl phosphate anionic surfactants has good antistatic performance, can effectively conduct and disperse the charges generated by fiber friction, enhance the cohesion between fibers, reduce the shedding of white powder due to the friction of individual or a few fiber bundles, greatly reduce the residue of white powder on the hot roller, and then adhere to the oil agent components, "dust" and organic matter thermal decomposition coke scale, affecting the cleaning cycle of the hot roller.

[0031] The stabilizer described is composed of phosphite, polyethylene glycol, and water mixed in a mass ratio of (0.5 - 1.5):(0.5 - 2.5):1.

[0032] The phosphite selected is triphenyl phosphite.

[0033] Phosphite is an antioxidant that can capture free radicals at high temperatures, while polyethylene glycol has a water absorption and moisturizing function. Together with water, it forms a W / O emulsion system, which helps to improve the stability of the oil agent during high-temperature use. All polyethylene glycol series can achieve the technical effects claimed in the present invention. Specifically, the polyethylene glycol can be specifically selected from polyethylene glycol 200 (PEG200).

[0034] Another object of the present invention is to provide a preparation method of the polyester industrial filament oil agent described, including: adding neopentyl polyol isostearate, trimethylolpropane octanoate, alkylamine coking dispersant, polyether ester emulsifier, and antistatic agent to a reaction kettle, heating to 40 - 45 °C, and continuously stirring for 1 - 2 h; after the stirring ends, cooling to 25 - 35 °C, adding the stabilizer, naturally settling for 1 - 2 h, filtering, canning, and sealing to obtain the finished polyester industrial filament oil agent.

[0035] The beneficial effects of the present invention:

[0036] The oil film strength and high-temperature antioxidant property of the polyester industrial filament oil agent of the present invention are relatively high, the wrapping property of the fiber is good, the lubricating performance of the oil agent is good, the high-temperature heat resistance is good, the smoke emission is less, the coking of the hot roller during spinning with the original oil is less, the cleaning cycle of the roller is ≥ 48 h (required by the internal control index of the production process), and it has excellent anti-coking and dispersing performance. Specifically manifested as:

[0037] 1. The present invention uses neopentyl polyol isostearate as a smoothing agent to enhance the oil film strength and high-temperature antioxidant property of the oil agent, improve the lubricating performance of the oil agent, and reduce the dynamic friction coefficient μ between the fiber and the hot roller d , which can significantly reduce the friction white powder and reduce the contribution degree of the coking substance on the hot roller.

[0038] 2. The present invention uses a relatively large amount of alkylamine coke deposition dispersants, which have excellent dispersion effects. They can adsorb solid small particles such as carbon deposits and white powder generated at high temperatures, wrap and wet the fibers through the oil agent, and leave the hot roll metal surface with the fibers during operation, preventing large aggregated particles from adhering to the hot roll and extending the cleaning cycle of the hot roll. In addition, the alkylamine coke deposition dispersants have good oil solubility, which helps to disperse high-viscosity and high-density active components in the oil agent, such as polyether ester emulsifiers and neopentyl polyol isostearates, and improve the high-temperature use and storage stability of the oil agent emulsion.

[0039] 3. The present invention simultaneously uses trimethylolpropane octanoate / dodecanoate as a smoothing agent, which can endow the fibers with a smooth and soft texture, reduce friction, and effectively reduce the kinematic viscosity of the oil agent. Similarly, alkylamine coke deposition dispersants (especially polyetheramines) are low-viscosity and high-temperature-resistant additives, which can form a protective film on the hot roll metal surface, effectively preventing the adhesion of deposits, and their special molecular structure can form a protective layer, thus maintaining the cleaning and protective effects. The synergistic effect of multiple components in the oil agent can fundamentally enhance the anti-wear lubricity of the fibers, protect the metal defects on the hot roll surface, reduce the friction effect, enhance the dispersion effect of primary coke scale, extend the cleaning cycle of the hot roll, greatly improve the spinning performance of the oil agent, and improve the production operation efficiency of polyester industrial yarns.

[0040] 4. The present invention introduces components such as propylene glycol block polyether and stabilizers, which actually introduce "water-soluble" components to fully dissolve the salts formed by the reaction of alkylamine coke deposition dispersants such as polyetheramines, forming a water-in-oil (W / O) type emulsion system, maximizing the "emulsifying" effect of the stabilizer, and ensuring the dosage and use effect of a large amount of polyetheramine. Detailed implementation mode

[0041] The present invention will be further described below in conjunction with specific examples for the convenience of understanding the present invention, but it does not limit the present invention accordingly.

[0042] Neopentyl glycol diisostearate, pentaerythritol tetraisostearate, trimethylolpropane triisostearate, and dipentaerythritol isostearate all meet the following requirements: purity ≥ 99%, acid value ≤ 2 mg KOH / g, and hydroxyl value ≤ 5 mg KOH / g.

[0043] The poly(oxybutylene)amine FL2000 is prepared by the following method, including: Step (1), using polyetheramine FL-1000 as the initiator of the polyether part of the structure and KOH as the catalyst, with the amount of KOH being 0.3% of the mass of the polyether. React according to the molar ratio of polyetheramine FL-1000 to epoxybutane being 1:15, control the reaction temperature at 140 - 160 °C and the pressure at 0.3 - 0.6 MPa to obtain a crude polyether product. The crude polyether product is refined to remove potassium to obtain poly(oxybutylene) ether with an average molecular weight of 2000 and a K content of 10 - 30 ppm; Step (2), the poly(oxybutylene) ether undergoes a hydroamination reaction in a fixed-bed reactor filled with a NiCu-supported catalyst (the loading amount of Ni is 30%, the loading amount of Cu is 10%, and the carrier is Al 2 O 3 ). The molar ratio of poly(oxybutylene) ether, NH 3 and H 2 is 1:8:10, the reaction temperature is 270 °C, and the reaction pressure is 6.5 MPa to obtain poly(oxybutylene)amine FL2000 with an average molecular weight of 2000.

[0044] The Mannich amine dispersant with Mw = 1080 is prepared by the following method, including: Step (1), in a reaction vessel, add 300 g of D60 solvent oil as the solvent, add 141 g of phenol, 1000 g of high-activity polyisobutylene with a molecular weight of 1000, and mix with 7 g of trifluoromethanesulfonic acid (catalyst), stir and heat, and react at 80 °C for 9 h to obtain an alkylated product; Step (2), then add about 210 g of dimethylamine solution (mass fraction 33%), and dropwise add 130 g of formaldehyde solution (mass fraction about 37%) using a constant-pressure funnel, and continuously stir for 0.5 h; slowly raise the temperature to 100 - 120 °C (the heating rate is controlled ≤ 1 °C / min), and continuously stir and react for 3 h to carry out the Mannich amination reaction; Step (3), after the reaction is completed, turn off the stirring, let it stand for 2 h, separate the middle and lower aqueous phases, then add 300 g of toluene, and carry out vacuum distillation at a temperature of 100 ± 5 °C and a pressure of -0.09 MPa for 4 h to remove impurities such as free phenol to obtain a Mannich amine dispersant with an average molecular weight Mw = 1080.

[0045] The polyetheramine dispersant with Mw = 1100 is prepared by the following method, including: Step (1), using p-tert-octylphenol as the initiator and KOH as the catalyst, the dosage of KOH is 0.3% of the mass of the polyether. React according to the molar ratio of p-tert-octylphenol to propylene oxide of 1:13, control the reaction temperature at 120 - 140 °C and the reaction pressure at 0.2 - 0.3 MPa to obtain the crude polyether. The crude polyether is refined to remove K to obtain p-tert-octylphenol propylene oxide ether with an average molecular weight of 1000; Step (2), p-tert-octylphenol propylene oxide ether undergoes a hydroamination reaction in a fixed-bed reactor filled with a NiCu supported catalyst (the loading amount of Ni is 25%, the loading amount of Cu is 5%, and the carrier is Al 2 O 3 ). The molar ratio of p-tert-octylphenol propylene oxide ether, NH 3 and H 2 is 1:6:8, the reaction temperature is 250 ± 10 °C, and the reaction pressure is 5.5 MPa to obtain the polyetheramine dispersant with Mw = 1100.

[0046] Example 1

[0047] The raw materials and mass percentages of the polyester industrial yarn oil agent are as follows:

[0048] Neopentyl glycol diisooctanoate 55%, trimethylolpropane octanoate 8%, composite antistatic agent 10% (mixed by 50% sodium dodecylsulfonate and 50% potassium cetyl phosphate), polyetheramine FL-1000 15%, polyethylene glycol 200 dioleate 8%, stabilizer 4% (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water according to the mass ratio of 0.5:0.5:1).

[0049] The preparation method of the polyester industrial yarn oil agent in this example is as follows: Add neopentyl glycol diisooctanoate, trimethylolpropane octanoate, polyetheramine FL-1000, polyethylene glycol 200 dioleate, and composite antistatic agent to the reaction kettle, heat up to 40 °C, and continuously stir for 1 h; after the stirring ends, cool down to 30 °C, add the stabilizer, naturally settle for 2 h, then filter and can, and seal to obtain the finished product.

[0050] The technical performance test of the polyester industrial yarn oil agent in this example is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0051] Example 2

[0052] The raw materials and mass percentages of the polyester industrial yarn oil agent are as follows:

[0053] 60% pentaerythritol tetraisostearate, 5% trimethylolpropane caprylate / caprate, 10% compound antistatic agent (prepared by mixing 50% sodium dodecylsulfonate and 50% potassium cetyl phosphate), 15% polyetheramine FL-1000, 8% Mw = 2000 propylene glycol block polyether (PO / EO molar ratio = 60 / 40), 2% stabilizer (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 0.5:0.5:1).

[0054] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning condition statistics of the on-machine spinning test are shown in Table 2.

[0055] Example 3

[0056] The raw materials and mass percentages of the polyester industrial yarn finish are as follows:

[0057] 60% dipentaerythritol hexaisostearate, 5% trimethylolpropane caprylate / caprate, 10% compound antistatic agent (prepared by mixing 50% sodium dodecylsulfonate and 50% potassium cetyl phosphate), 15% BASF 3448N, 8% polyethylene glycol 400 dioleate, 2% stabilizer (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 0.5:2.5:1).

[0058] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning condition statistics of the on-machine spinning test are shown in Table 2.

[0059] Example 4

[0060] The raw materials and mass percentages of the polyester industrial yarn finish are as follows:

[0061] 60% trimethylolpropane triisostearate, 5% trimethylolpropane caprylate / caprate, 5% compound antistatic agent (prepared by mixing 70% sodium dodecylsulfonate and 30% potassium cetyl phosphate), 15% polyepoxybutyleneamine FL2000, 8% Mw = 2000 propylene glycol block polyether (PO / EO molar ratio = 60 / 40), 5% stabilizer (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 1.5:0.5:1).

[0062] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning condition statistics of the on-machine spinning test are shown in Table 2.

[0063] Example 5

[0064] The raw materials and mass percentages of the polyester industrial yarn finish are as follows:

[0065] Pentaerythrityl tetraisostearate 5%, dipentaerythrityl hexaisostearate 52%, trimethylolpropane caprylate / caprate 5%, compound antistatic agent 5% (composed of 60% sodium dodecylsulfonate and 40% potassium cetyl phosphate), M W Mannich amine dispersant with Mw = 1080 23%, propylene glycol block polyether with Mw = 4000 (PO / EO molar ratio = 60 / 40) 5%, stabilizer 5% (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 1.5:0.5:1)

[0066] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0067] Example 6

[0068] The raw materials and mass percentages of the polyester industrial yarn finish are as follows:

[0069] Pentaerythrityl tetraisostearate 5%, dipentaerythrityl hexaisostearate 55%, trimethylolpropane caprylate / caprate 5%, compound antistatic agent 10% (composed of 50% sodium dodecylsulfonate and 50% potassium cetyl phosphate), T151 dispersant 15%, polyethylene glycol 600 monooleate 5%, stabilizer 5% (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 1.5:0.5:1).

[0070] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0071] Example 7

[0072] The raw materials and mass percentages of the polyester industrial yarn finish are as follows:

[0073] Trimethylolpropane triisostearate 55%, neopentyl glycol diisostearate 5%, trimethylolpropane caprylate / caprate 8%, compound antistatic agent 5% (composed of 50% sodium dodecylsulfonate and 50% potassium cetyl phosphate), T154 dispersant 15%, polyethylene glycol 1000 monooleate 8%, stabilizer 4% (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 0.5:0.5:1).

[0074] The polyester industrial yarn finish of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn finish of this example is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0075] Example 8

[0076] The raw materials and mass percentages of each component of the polyester industrial yarn oil agent are as follows:

[0077] Trimethylolpropane triisostearate 10%, pentaerythritol tetraisostearate 50%, trimethylolpropane octanoate 5%, compound antistatic agent 5% (composed of 75% sodium dodecyl sulfonate and 25% potassium cetyl phosphate), polyetheramine FL-1000 20%, propylene glycol block polyether with Mw = 4000 (PO / EO molar ratio = 60 / 40) 6%, stabilizer 4% (prepared by mixing triphenyl phosphite, polyethylene glycol 200, and water in a mass ratio of 1:1:1).

[0078] The polyester industrial yarn oil agent of this example was prepared by referring to the preparation method of Example 1. The technical performance test of the polyester industrial yarn oil agent of this example is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0079] Comparative Example 1

[0080] A high-temperature oil agent for polyester industrial yarns was prepared according to the method disclosed in Example 8 of CN116837495A.

[0081] (1) Neopentyl glycol diisostearate 10%, ditrimethylolpropane hexaisostearate 50%, Gemini surfactant 12% (composed of 60% octanediol-based sulfonate anionic Gemini surfactant and 40% butanediol-based sodium phosphate anionic Gemini surfactant), polyetheramine dispersant with M W = 1100 8%, polyethylene glycol monolaurate (PEG200ML) 10%, amino silicone oil 4%, dimethyl silicone oil 1%, stabilizer 5% (prepared by mixing triphenyl phosphite, glycerol, and water in a mass ratio of 1:1:1);

[0082] (2) Neopentyl glycol diisostearate, ditrimethylolpropane hexaisostearate, Gemini surfactant, polyetheramine dispersant, polyether ester emulsifier, and white powder remover (amino silicone oil, dimethyl silicone oil) were added to the reaction kettle in sequence, and the temperature was raised to 45°C and stirred continuously for 2 h; after the stirring was completed, the temperature was lowered to 35°C, the stabilizer was added, and after natural sedimentation for 2 h, it was filtered, canned, and sealed to obtain the polyester industrial yarn oil agent. The technical performance test of this polyester industrial yarn oil agent is shown in Table 1, and the spinning conditions statistics of the on-machine spinning test are shown in Table 2.

[0083] Table 1. Technical indicators of the polyester industrial yarn oil agents obtained in Examples 1 - 8 and Comparative Example 1

[0084]

[0085] Table 2. Service performance of the polyester industrial yarn finish obtained from Examples 1-8 and Comparative Example 1

[0086]

[0087] As can be seen from Table 1, the polyester industrial yarn finish of the present invention has a relatively high oil film strength, good antistatic performance, can effectively reduce the friction factor (F / M) of the finish, and has good medium- to high-temperature stability, and can exist stably and uniformly. Its performance is similar to that of the existing finishes; compared with the existing finishes, the high-temperature burning volatilization amount of the polyester industrial yarn finish of the present invention is significantly improved. As can be seen from Table 2, the finish of the present invention can meet the conventional requirements of polyester industrial yarn production, and has good spinning performance, specifically manifested as the fiber breakage rate, the number of fiber hairiness, and the full winding rate. Especially when the wash roll cycle is extended, the amount of white powder falling off the hot roll and the amount of coke formation (dirty water solid content, COD) are significantly better than those of the existing finishes, indicating that alkylamine coke dispersion agents such as polyetheramine can effectively organize coke formation and the finish has good anti-coking properties.

[0088] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. A polyester industrial yarn oil with good anti-coking property, characterized in that: It is composed of the following raw materials in percentage by mass:

2. The polyester industrial yarn oil with good anti-coking property according to claim 1, characterized in that: It is composed of the following raw materials in percentage by mass:

3. The polyester industrial yarn oil with good anti-coking property according to claim 1 or 2, characterized in that: The purity of the neopentyl polyol isostearate is ≥99%, the acid value is ≤2mgKOH / g, and the hydroxyl value is ≤5mgKOH / g; the neopentyl polyol isostearate is selected from at least one of neopentyl glycol diisostearate, pentaerythritol tetraisostearate, trimethylolpropane triisostearate or dipentaerythritol isostearate.

4. The polyester industrial yarn oil with good anti-coking property according to claim 1 or 2, characterized in that: The alkylamine coking dispersant is an oil-soluble dispersant with an average molecular weight of 600 to 3000.

5. The polyester industrial yarn oil with good anti-coking property according to claim 1 or 2, characterized in that: The alkylamine coking dispersant is selected from at least one of BASF 3448N, polyetheramine FL-1000, polyepoxybutyleneamine FL2000, alkylphenol-formaldehyde resin polyoxyethylene monoamine, alkylphenol-formaldehyde resin Mannich amine, monoalkenyl succinimide, and polyisobutylene bissuccinimide.

6. The polyester industrial yarn oil with good anti-coking property according to claim 1 or 2, characterized in that: The polyether ester emulsifier is one or a mixture of polyethylene glycol oleate, sulfonated castor oil, fatty alcohol polyoxyethylene ether, and propylene glycol block polyether.

7. The polyester industrial yarn oil with good anti-coking property according to claim 6, characterized in that: The polyethylene glycol oleate is polyethylene glycol 200-1000 dioleate or polyethylene glycol 200-1000 monooleate; the propylene glycol block polyether has a Mw of 2000-4000 and is polymerized with propylene glycol as an initiator through a molar ratio of PO to EO of 60:

40.

8. The polyester industrial yarn oil with good anti-coking property according to claim 1 or 2, characterized in that: The composite high-efficiency antistatic agent is prepared by mixing an alkyl sulfonate surfactant and an alkyl phosphate salt anionic surfactant in a mass ratio of 1:1 to 3:1; the stabilizer is prepared by mixing phosphite, polyethylene glycol and water in a mass ratio of (0.5 to 1.5):(0.5 to 2.5):

1.

9. The polyester industrial yarn oil with good anti-coking property according to claim 8, characterized in that: The alkyl sulfonate type surfactant is selected from sodium dodecyl sulfonate; the alkyl phosphate ester salt type anionic surfactant is selected from potassium hexadecyl phosphate; and the phosphite is selected from triphenyl phosphite.

10. A method for preparing the polyester industrial silk finish according to claim 1, characterized in that: include: Neopentyl polyol isostearate, trimethylolpropane octanoate, alkylamine coking dispersant, polyether ester emulsifier and antistatic agent are added into the reaction kettle, the temperature is raised to 40-45°C, and stirring is continued for 1-2 hours; after the stirring is completed, the temperature is lowered to 25-35°C, a stabilizer is added, and the mixture is naturally settled for 1-2 hours, filtered, canned and sealed to obtain a finished polyester industrial yarn oil agent.

Images