A polyester high-speed spinning POY oil agent for extending the hot box coking cycle and a preparation method thereof

Abstract

The present invention belongs to the field of polyester oil, and specifically relates to a polyester high-speed spinning POY oil for extending the hot box coking cycle and a preparation method thereof. The polyester high-speed spinning POY oil comprises the following components by weight: 50-60 parts of a smoothing agent; 15-20 parts of an emulsifier; 6-10 parts of an antistatic agent; 5-8 parts of a bundling agent; and 10-15 parts of an additive. The polyester high-speed spinning POY oil prepared by the present invention has good physical and chemical properties, stability, and permeability, especially excellent antibacterial properties and high temperature resistance. When used for spinning, it has good use effect, stable viscosity-temperature-viscosity characteristics, almost no smoke during spinning, almost no coking on the heater, and can extend the hot box coking cycle.

Description

Technical Field

[0001] The invention belongs to the field of polyester oil agents, and in particular relates to a polyester high-speed spinning POY oil agent for extending a hot box coking cycle and a preparation method thereof. Background Art

[0002] The polyester high-speed spinning production process includes two stages: high-speed spinning and high-speed drawing and deformation, namely, pre-oriented yarn or partially oriented yarn (POY, Pre-Oriented Yarn or Partially Oriented Yarn) and draw texturing yarn (DTY, DrawTexturing Yarn), referred to as the POY-DTY process; during the high-speed spinning process, the oil agent needs to be sprayed on the fiber surface to give the fiber good smoothness and cohesion, to avoid abnormal spinning phenomena such as hair, broken ends, and entanglement during the production process, so as to ensure smooth spinning. As a high-speed spinning oil agent, it is not only required to have basic smoothness, bundling, antistatic properties and wettability, and be able to spread and wet quickly and evenly on the fiber surface, and quickly and evenly apply oil, but also requires it to have good heat resistance, be able to stably exist during high-temperature drawing and deformation, not easy to be heated and coked, and have low smoke emission.

[0003] At present, polyester POY oil is mainly composed of lubricants, emulsifiers, antistatic agents and stabilizers. Among them, the lubricant is the main component, which affects the comprehensive performance of the oil. Mineral oil, polyether, fatty alcohol, polyol ester, etc. are generally selected. Polyether is the most widely used due to its good heat resistance and low volatility. In order to realize the production of multifunctional polyester fibers, the development of some oils with special functions such as antibacterial properties is also particularly important. Additives with antibacterial effects are usually added to the oil to achieve the antibacterial effect of the oil.

[0004] A Chinese patent application with application number CN202310342965.8 discloses an antibacterial polyester POY oil agent, a preparation method and its application. The polyester POY oil agent includes a lubricant, an oil film enhancer, an emulsifier, an antistatic agent, and an additive. The oil film enhancer includes synergistic stearic acid polyoxypropylene ether and fatty alcohol polyoxyethylene ether phosphate. The oil film enhancer formed by the combination of the two can significantly improve the oil film strength and reduce abnormal conditions such as lint and broken ends during fiber spinning. The additive contains an acetophenone compound antibacterial agent, which gives the oil agent certain antibacterial properties.

[0005] A Chinese patent application with application number CN202311751182.1 discloses a POY oil agent for antibacterial fibers and a preparation method thereof. The POY oil agent is mainly composed of EO / PO random copolymerized lauryl alcohol polyether, and a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and additives are auxiliary ingredients. By adding an additive containing a spinning oil preservative and a bactericidal agent to the oil agent, it is possible to protect the quality of the oil agent while also providing antibacterial protection on the surface of the antibacterial fiber.

[0006] The above patents all add antibacterial substances to enhance the antibacterial properties of the oil, but the antibacterial effect is poor, and the high-temperature stability of the oil is insufficient, and there is still slight smoke, trace coking and white powder; therefore, it is necessary to develop a high-temperature resistant functional POY oil to meet market demand. Summary of the invention

[0007] The object of the present invention is to provide a polyester high-speed spinning POY oil agent for extending the hot box coking cycle and a preparation method thereof in view of the deficiencies in the prior art. The polyester high-speed spinning POY oil agent prepared by the present invention has good physical and chemical properties, stability, and permeability, especially excellent antibacterial properties and high temperature resistance. When used for spinning, the use effect is good, the viscosity-temperature-viscosity characteristics are stable, there is almost no smoke during spinning, and there is almost no coking on the heater, and the hot box coking cycle can be extended.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0009] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 50-60 parts of a smoothing agent; 15-20 parts of an emulsifier; 6-10 parts of an antistatic agent; 5-8 parts of a sizing agent; and 10-15 parts of an additive.

[0010] Furthermore, the smoothing agent is composed of polyether, mineral oil and modified linseed oil in a mass ratio of 5-6:2-3:2; the polyether is one or a mixture of fatty acid random polyoxyethylene polyoxypropylene ether, fatty alcohol random polyoxyethylene polyoxypropylene ether and dialkyl-terminated polyether.

[0011] Furthermore, the emulsifier is one or a mixture of fatty alcohol polyoxyethylene ether, polyoxyethylene cholesterol ether, fatty acid polyethylene glycol ester, and lauryl alcohol polyoxyethylene ether.

[0012] Furthermore, the antistatic agent is one of alkyl phosphate ester salts, alkyl polyoxyethylene ether phosphate ester salts, and alkyl sulfate ester salts, or a mixture of several of them.

[0013] Furthermore, the sizing agent is one or a mixture of fatty acid triethanolamine salt, oleic acid triethanolamine salt, lauryl polyoxyethylene ether, and polyoxyethylene polyoxypropylene ether.

[0014] Further, the additive is composed of a benzimidazole derivative and ethylene glycol in a mass ratio of 1:0.8-1;

[0015] In the technical scheme of the present invention, the preparation method of the modified linseed oil is as follows: linseed oil and benzimidazole derivatives are added to toluene, mixed evenly, under nitrogen protection, the reaction temperature is maintained at 90-100°C, dibenzoyl peroxide is added, and the reaction is continued with stirring for 2-3 hours. After the reaction is completed, the toluene is removed to obtain the modified linseed oil;

[0016] Furthermore, in the preparation method of modified linseed oil, the mass ratio of linseed oil, benzimidazole derivative and dibenzoyl peroxide is 1:0.5-0.6:0.05-0.1.

[0017] In the technical solution of the present invention, the benzimidazole derivatives in the preparation methods of the additive and the modified linseed oil are:

[0018] ; The preparation method of the benzimidazole derivative is:

[0019] S1. Add acetone, 2-vinylbenzimidazole, sodium 3-chloro-2-hydroxypropanesulfonate and triethylamine to a dry three-necked flask, mix well, maintain the reaction temperature at 50-55°C, stir and react for 5-6h. After the reaction is completed, remove the acetone, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and dry to obtain benzimidazole sulfonate;

[0020] S2, toluene, benzimidazole sulfonate, 3-chloropropionic acid and p-toluenesulfonic acid were added to a dry three-necked flask, mixed evenly, the reaction temperature was maintained at 110 ° C, refluxed for 3-4 hours, and the water generated by the reaction was collected using a water separator. After the reaction was completed, toluene was removed, ether was added, stirred evenly, and allowed to stand until no precipitation was generated, filtered, the product was washed with ether, and dried to obtain chlorinated-benzimidazole sulfonate;

[0021] S3. Add ethanol, chlorobenzimidazole sulfonate and dodecyldimethylamine to a dry three-necked flask, mix well, maintain the reaction temperature at 80°C, and reflux for 8-10 hours. After the reaction is completed, remove ethanol, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and dry to obtain a benzimidazole derivative.

[0022] Furthermore, in step S1, the molar ratio of 2-vinylbenzimidazole, sodium 3-chloro-2-hydroxypropanesulfonate and triethylamine is 1:1-1.1:1.2-1.3.

[0023] Furthermore, in step S2, the molar ratio of benzimidazole sulfonate, 3-chloropropionic acid, and p-toluenesulfonic acid is 1:1-1.1:0.01-0.02.

[0024] Furthermore, in step S3, the molar ratio of chloro-benzimidazole sulfonate to dodecyldimethyl tertiary amine is 1:1-1.1.

[0025] A method for preparing a polyester high-speed spinning POY oil agent for extending a hot box coking cycle comprises the following steps: adding a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and an additive into a reaction kettle according to a mass ratio, maintaining the reaction temperature at 50-60° C., stirring for 1-1.5 hours, and obtaining the polyester high-speed spinning POY oil agent.

[0026] The present invention has the following beneficial effects:

[0027] The benzimidazole derivative prepared by the present invention belongs to a zwitterionic compound, has the same total amount of positive and negative charges, has good stability, and the benzimidazole group and the long-chain quaternary ammonium salt group in the structure give the benzimidazole derivative a dual antibacterial effect; the benzimidazole group and the ester group in the structure have good high temperature resistance, which can improve the high temperature resistance of the benzimidazole derivative as a whole; the anionic hydrophilic group, the cationic hydrophilic group and the hydrophobic alkyl long chain in the structure enable the benzimidazole derivative to be used as a surfactant, has good emulsification, dispersing and wetting properties, and synergizes with the emulsifier in the oil to improve the stability and permeability of the oil.

[0028] Since linseed oil contains double bond groups, its stability and high temperature resistance are poor. In order to improve these defects, the present invention reacts linseed oil with a benzimidazole derivative through the double bond between the two under the action of a dibenzoyl peroxide initiator to obtain a modified linseed oil, which can reduce the double bond groups in the linseed oil and increase the branching degree. At the same time, the structure of the benzimidazole derivative can also give the modified linseed oil good stability, high temperature resistance and antibacterial properties.

[0029] The polyester high-speed spinning POY oil provided by the present invention has a lubricant composed of polyether, mineral oil and modified linseed oil as main components, and is prepared by reasonable proportioning. The polyester high-speed spinning POY oil has good physical and chemical properties, stability and permeability, especially excellent antibacterial property and high temperature resistance. When used for spinning, the use effect is good, the viscosity-temperature-viscosity characteristics are stable, there is almost no smoke during spinning, there is almost no coking on the heater, and the hot box coking cycle can be extended. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the technical scheme of the present invention, the chemical reagents used are all commonly available on the market, among which the fatty acid random polyoxyethylene polyoxypropylene ether is lauric acid random polyoxyethylene polyoxypropylene ether 1200; the fatty alcohol random polyoxyethylene polyoxypropylene ether is propylene glycol random polyoxyethylene polyoxypropylene ether 1500; and the dialkyl terminated polyether is dimethyl terminated polyether 2500.

[0032] Example 1

[0033] This embodiment provides a method for preparing a benzimidazole derivative, specifically:

[0034] S1, add 500mL acetone, 15.0g 2-vinylbenzimidazole, 21.5g 3-chloro-2-hydroxypropanesulfonate sodium and 12.6g triethylamine into a dry three-necked flask, mix well, maintain the reaction temperature at 50 ° C, stir and react for 6h, after the reaction is completed, remove acetone, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and obtain 27.5g benzimidazole sulfonate after drying; wherein the molar ratio of 2-vinylbenzimidazole, 3-chloro-2-hydroxypropanesulfonate and triethylamine is 1:1.05:1.2; the reaction process is:

[0035] ;

[0036] Benzimidazole sulfonate: ESI (m / z): 305.3 [M+H] + , 1 H-NMR (600 MHz, DMSO-d 6 , δppm): 7.64 (d, J=8.4Hz, 2H), 7.27 (d, J=8.4Hz, 2H), 6.63-6.66 (m, 1H), 5.55-5. 59 (m, 2H), 4.77 (s, 1H), 3.98-4.10 (m, 1H), 3.65-3.71 (m, 2H), 3.15-3.20 (m, 2H).

[0037] S2, add 400mL toluene, 25.0g benzimidazole sulfonate, 9.4g 3-chloropropionic acid and 0.3g p-toluenesulfonic acid into a dry three-necked flask, mix well, maintain the reaction temperature at 110 ° C, reflux reaction for 4h, and use a water separator to collect the water generated by the reaction. After the reaction is completed, remove toluene, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and obtain 28.3g chlorination-benzimidazole sulfonate after drying; wherein the molar ratio of benzimidazole sulfonate, 3-chloropropionic acid and p-toluenesulfonic acid is 1:1.05:0.02; the reaction process is:

[0038] ;

[0039] Chloro-benzimidazole sulfonate: ESI (m / z): 395.8 [M+H] + , 1 H-NMR (600 MHz, DMSO-d 6 , δppm): 7.66 (d, J=8.4Hz, 2H), 7.30 (d, J=8.4Hz, 2H), 6.65-6.68 (m, 1H), 5.55-5.60 (m, 2H), 4.70-4.76 (m, 1H), 3.83-3.90 (m, 4H), 3.23-3.30 (m, 2H), 2.53-2.58 (m, 2H).

[0040] S3, add 350mL ethanol, 28.0g chlorinated-benzimidazole sulfonate and 15.9g dodecyldimethyl tertiary amine to a dry three-necked flask, mix well, maintain the reaction temperature at 80°C, reflux for 8-10h, after the reaction is completed, remove ethanol, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and dry to obtain 32.6g benzimidazole derivative; wherein the molar ratio of chlorinated-benzimidazole sulfonate to dodecyldimethyl tertiary amine is 1:1.05; the reaction process is:

[0041] ;

[0042] Benzimidazole derivative: ESI (m / z): 550.7 [M+H] + , 1 H-NMR (600 MHz, DMSO-d 6, δppm): 7.65 (d, J=8.4Hz, 2H), 7.29 (d, J=8.4Hz, 2H), 6.63-6.67 (m, 1H), 5.56-5.60 (m, 2H), 4.71-4.76 (m, 1H), 3.85-3.91 (m, 2H), 3.6 3-3.69 (m, 2H), 3.22-3.30 (m, 8H), 2.69-2.74 (m, 2H), 1.71-1.77 (m, 2H), 1.45-1.50 (m, 1H), 1.22-1.29 (m, 19H), 0.88 (t, J=6.7Hz, 3H).

[0043] Example 2

[0044] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 60 parts of a smoothing agent; 18 parts of an emulsifier; 10 parts of an antistatic agent; 8 parts of a bundling agent; and 15 parts of an additive;

[0045] The lubricant is composed of polyether, mineral oil and modified linseed oil in a mass ratio of 6:2:2; the polyether is fatty acid random polyoxyethylene polyoxypropylene ether; the emulsifier is polyoxyethylene cholesterol ether; the antistatic agent is alkyl phosphate salt; the sizing agent is oleic acid triethanolamine salt; and the additive is composed of benzimidazole derivatives and ethylene glycol in a mass ratio of 1:0.8.

[0046] The preparation method of modified linseed oil is as follows: add linseed oil and benzimidazole derivatives into toluene, mix evenly, maintain the reaction temperature at 100°C under nitrogen protection, add dibenzoyl peroxide, continue stirring and reacting for 2 hours, and after the reaction is completed, remove toluene to obtain modified linseed oil; the mass ratio of linseed oil, benzimidazole derivative and dibenzoyl peroxide is 1:0.6:0.1.

[0047] A method for preparing a polyester high-speed spinning POY oil agent for extending a hot box coking cycle comprises the following steps: adding a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and an additive into a reaction kettle according to a mass ratio, maintaining the reaction temperature at 60°C, stirring for 1 hour, and obtaining the polyester high-speed spinning POY oil agent.

[0048] Example 3

[0049] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 55 parts of a smoothing agent; 20 parts of an emulsifier; 8 parts of an antistatic agent; 5 parts of a bundling agent; and 13 parts of an additive.

[0050] The lubricant is composed of polyether, mineral oil and modified linseed oil in a mass ratio of 5:3:2; the polyether is fatty alcohol random polyoxyethylene polyoxypropylene ether; the emulsifier is fatty alcohol polyoxyethylene ether; the antistatic agent is alkyl polyoxyethylene ether phosphate salt; the sizing agent is fatty acid triethanolamine salt; and the additive is composed of benzimidazole derivatives and ethylene glycol in a mass ratio of 1:1.

[0051] The preparation method of modified linseed oil is as follows: add linseed oil and benzimidazole derivatives into toluene, mix evenly, maintain the reaction temperature at 95°C under nitrogen protection, add dibenzoyl peroxide, continue stirring and reacting for 3 hours, and after the reaction is completed, remove toluene to obtain modified linseed oil; the mass ratio of linseed oil, benzimidazole derivatives and dibenzoyl peroxide is 1:0.5:0.05.

[0052] A method for preparing a polyester high-speed spinning POY oil agent for extending a hot box coking cycle comprises the following steps: adding a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and an additive into a reaction kettle according to a mass ratio, maintaining the reaction temperature at 50°C, stirring for 1.5 hours, and obtaining the polyester high-speed spinning POY oil agent.

[0053] Example 4

[0054] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 50 parts of a smoothing agent; 15 parts of an emulsifier; 6 parts of an antistatic agent; 7 parts of a bundling agent; and 10 parts of an additive;

[0055] The smoothing agent is composed of polyether, mineral oil and modified linseed oil in a mass ratio of 6:3:2; the polyether is a dialkyl-terminated polyether; the emulsifier is fatty acid polyethylene glycol ester; the antistatic agent is alkyl sulfate ester; the sizing agent is lauryl polyoxyethylene ether; and the additive is composed of benzimidazole derivatives and ethylene glycol in a mass ratio of 1:0.9.

[0056] The preparation method of modified linseed oil is as follows: add linseed oil and benzimidazole derivatives into toluene, mix evenly, maintain the reaction temperature at 90°C under nitrogen protection, add dibenzoyl peroxide, continue stirring and reacting for 2.5 hours, and after the reaction is completed, remove toluene to obtain modified linseed oil; the mass ratio of linseed oil, benzimidazole derivative and dibenzoyl peroxide is 1:0.55:0.1.

[0057] A method for preparing a polyester high-speed spinning POY oil agent for extending a hot box coking cycle comprises the following steps: adding a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and an additive into a reaction kettle according to a mass ratio, maintaining the reaction temperature at 55° C., stirring for 1.5 hours, and obtaining the polyester high-speed spinning POY oil agent.

[0058] Comparative Example 1

[0059] Compared with Example 2, this comparative example replaces the modified linseed oil in the lubricant with linseed oil.

[0060] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 60 parts of a smoothing agent; 18 parts of an emulsifier; 10 parts of an antistatic agent; 8 parts of a bundling agent; and 15 parts of an additive;

[0061] The smoothing agent is composed of polyether, mineral oil and linseed oil in a mass ratio of 6:2:2; the polyether is fatty acid random polyoxyethylene polyoxypropylene ether; the emulsifier is polyoxyethylene cholesterol ether; the antistatic agent is alkyl phosphate salt; the sizing agent is oleic acid triethanolamine salt; the additive is composed of benzimidazole derivatives and ethylene glycol in a mass ratio of 1:0.8.

[0062] The preparation method of a polyester high-speed spinning POY oil agent for extending the hot box coking cycle is the same as that in Example 2.

[0063] Comparative Example 2

[0064] Compared with Example 2, the additive in this comparative example is ethylene glycol.

[0065] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 60 parts of a smoothing agent; 18 parts of an emulsifier; 10 parts of an antistatic agent; 8 parts of a bundling agent; and 15 parts of an additive;

[0066] The lubricant is composed of polyether, mineral oil and modified linseed oil in a mass ratio of 6:2:2; the polyether is fatty acid random polyoxyethylene polyoxypropylene ether; the emulsifier is polyoxyethylene cholesterol ether; the antistatic agent is alkyl phosphate salt; the sizing agent is oleic acid triethanolamine salt; and the additive is ethylene glycol.

[0067] The preparation method of modified linseed oil is as follows: add linseed oil and benzimidazole derivatives into toluene, mix evenly, maintain the reaction temperature at 100°C under nitrogen protection, add dibenzoyl peroxide, continue stirring and reacting for 2 hours, and after the reaction is completed, remove toluene to obtain modified linseed oil; the mass ratio of linseed oil, benzimidazole derivative and dibenzoyl peroxide is 1:0.6:0.1.

[0068] The preparation method of a polyester high-speed spinning POY oil agent for extending the hot box coking cycle is the same as that in Example 2.

[0069] Comparative Example 3

[0070] Compared with Example 2, the modified linseed oil in the lubricant is replaced with linseed oil, and the additive is ethylene glycol.

[0071] A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, comprising the following components by weight: 60 parts of a smoothing agent; 18 parts of an emulsifier; 10 parts of an antistatic agent; 8 parts of a bundling agent; and 15 parts of an additive;

[0072] The lubricant is composed of polyether, mineral oil and linseed oil in a mass ratio of 6:2:2; the polyether is fatty acid random polyoxyethylene polyoxypropylene ether; the emulsifier is polyoxyethylene cholesterol ether; the antistatic agent is alkyl phosphate salt; the sizing agent is oleic acid triethanolamine salt; and the additive is ethylene glycol.

[0073] The preparation method of a polyester high-speed spinning POY oil agent for extending the hot box coking cycle is the same as that in Example 2.

[0074] Performance Testing

[0075] The POY oil for high-speed spinning of polyester prepared in Examples 2-4 and Comparative Examples 1-3 was subjected to physical and chemical performance tests according to conventional detection methods in the art, and the pH, room temperature stability (25°C, 7d), high temperature stability (80°C, 8h), surface tension, oiling rate, conductivity and antibacterial properties of the 10% aqueous solution emulsion were measured. The antibacterial test was as follows: the 10% aqueous solution emulsion was added dropwise to the Escherichia coli colony, and the antibacterial effect was observed after 1h. The antibacterial rate was calculated by counting the number of colonies before and after the addition; the results are shown in Table 1 below.

[0076] Table 1 Physical and chemical properties test results

[0077]

[0078] From the results in Table 1, it can be seen that the polyester high-speed spinning POY oil prepared in Examples 2-4 of the present invention has good physical and chemical properties, good stability of the 10% aqueous solution emulsion, and low surface tension, which means that it has strong penetration ability, can be quickly and evenly oiled, and has good antibacterial properties. Compared with Comparative Examples 1-3, in Example 2 of the present invention, the smoothing agent contains modified linseed oil, and the additive contains a benzimidazole derivative, wherein the modified linseed oil contains a benzimidazole derivative structure, and the two can work together to improve the stability, permeability and antibacterial properties of the oil.

[0079] Spinning experiments were carried out on the polyester high-speed spinning POY oil prepared in Examples 2-4 and Comparative Examples 1-3, wherein the spinning specification was 135dtex / 72f and the spinning speed was 3200m / min. The results are shown in Table 2 below.

[0080] Table 2 Spinning performance test results

[0081]

[0082] It can be seen from the results in Table 2 that the present invention uses the polyester high-speed spinning POY oil prepared in Examples 2-4 for spinning, and the polyester fiber has a high first-class rate, good molding, and no abnormal phenomena such as lint. During the use of the oil, the viscosity-temperature-viscosity characteristics are stable, there is almost no smoke during spinning, and there is almost no coking on the heater, which shows that it can extend the hot box coking cycle and has excellent high temperature resistance. Compared with Comparative Examples 1-3, the modified linseed oil in the smoothing agent in Example 2 of the present invention and the benzimidazole derivative in the additive work together to greatly improve the high temperature resistance of the oil.

[0083] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0084] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A polyester high-speed spinning POY oil agent for extending the hot box coking cycle, characterized in that: The invention comprises the following components in parts by weight: 50-60 parts of a smoothing agent; 15-20 parts of an emulsifier; 6-10 parts of an antistatic agent; 5-8 parts of a sizing agent; and 10-15 parts of an additive. The smoothing agent is composed of polyether, mineral oil, and modified linseed oil in a mass ratio of 5-6:2-3:2; and the additive is composed of a benzimidazole derivative and ethylene glycol in a mass ratio of 1:0.8-1. The preparation method of the modified linseed oil comprises: adding linseed oil and benzimidazole derivatives to toluene, mixing evenly, maintaining the reaction temperature at 90-100° C. under nitrogen protection, adding dibenzoyl peroxide, continuing to stir and react for 2-3 hours, and after the reaction is completed, removing toluene to obtain the modified linseed oil; The benzimidazole derivatives described in the preparation methods of the additive and modified linseed oil are: ； The emulsifier is one or a mixture of fatty alcohol polyoxyethylene ether, polyoxyethylene cholesterol ether, fatty acid polyethylene glycol ester, lauryl alcohol polyoxyethylene ether; the antistatic agent is one or a mixture of alkyl phosphate ester salt, alkyl polyoxyethylene ether phosphate ester salt, alkyl sulfate ester salt; the sizing agent is one or a mixture of fatty acid triethanolamine salt, oleic acid triethanolamine salt, lauryl polyoxyethylene ether, polyoxyethylene polyoxypropylene ether.

2. A polyester high-speed spinning POY oil agent for extending the hot box coking cycle according to claim 1, characterized in that: The preparation method of the benzimidazole derivative is: S1. Add acetone, 2-vinylbenzimidazole, sodium 3-chloro-2-hydroxypropanesulfonate and triethylamine to a dry three-necked flask, mix well, maintain the reaction temperature at 50-55°C, stir and react for 5-6h. After the reaction is completed, remove the acetone, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and dry to obtain benzimidazole sulfonate; S2, toluene, benzimidazole sulfonate, 3-chloropropionic acid and p-toluenesulfonic acid were added to a dry three-necked flask, mixed evenly, the reaction temperature was maintained at 110 ° C, refluxed for 3-4 hours, and the water generated by the reaction was collected using a water separator. After the reaction was completed, toluene was removed, ether was added, stirred evenly, and allowed to stand until no precipitation was generated, filtered, the product was washed with ether, and dried to obtain chlorinated-benzimidazole sulfonate; S3. Add ethanol, chlorobenzimidazole sulfonate and dodecyldimethylamine to a dry three-necked flask, mix well, maintain the reaction temperature at 80°C, and reflux for 8-10 hours. After the reaction is completed, remove ethanol, add ether, stir well, let stand until no precipitation is generated, filter, wash the product with ether, and dry to obtain a benzimidazole derivative.

3. A polyester high-speed spinning POY oil agent for extending the hot box coking cycle according to claim 2, characterized in that: The molar ratio of 2-vinylbenzimidazole, sodium 3-chloro-2-hydroxypropanesulfonate and triethylamine in step S1 is 1:1-1.1:1.2-1.3; the molar ratio of benzimidazole sulfonate, 3-chloropropionic acid and p-toluenesulfonic acid in step S2 is 1:1-1.1:0.01-0.02; the molar ratio of chloro-benzimidazole sulfonate and dodecyldimethyl tertiary amine in step S3 is 1:1-1.

1.

4. The polyester high-speed spinning POY oil agent for extending the hot box coking cycle according to claim 1, characterized in that: In the preparation method of modified linseed oil, the mass ratio of linseed oil, benzimidazole derivative and dibenzoyl peroxide is 1:0.5-0.6:0.05-0.

1.

5. The polyester high-speed spinning POY oil agent for extending the hot box coking cycle according to claim 1, characterized in that: The polyether is one or a mixture of fatty acid random polyoxyethylene polyoxypropylene ether, fatty alcohol random polyoxyethylene polyoxypropylene ether, and dialkyl-terminated polyether.

6. A method for preparing a polyester high-speed spinning POY oil agent for extending a hot box coking cycle as claimed in any one of claims 1 to 5, characterized in that: The method comprises the following steps: adding a smoothing agent, an emulsifier, an antistatic agent, a sizing agent and additives into a reaction kettle according to a mass ratio, maintaining a reaction temperature of 50-60 DEG C, stirring for 1-1.5 hours, and obtaining a polyester high-speed spinning POY oil agent.

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