Polyester filament POY spinning oil containing low-acid-value and high-flash-point alkyl-terminated polyether and preparation method thereof

Abstract

The invention discloses polyester filament yarn POY spinning oil containing low-acid-value and high-flash-point alkyl-terminated polyether and a preparation method of the polyester filament yarn POY spinning oil, and relates to the technical field of spinning. According to the technical scheme, the anti-static agent comprises the following components in percentage by mass: 50-70% of polyether, 20-40% of an emulsifier, 1-3% of an anti-static agent, 5-21% of a bundling agent and 4-15% of an additive, wherein the acid value of the polyether is less than 0.03 mgKOH / g, and the flash point is more than 245 DEG C. Compared with the traditional end-capped polyether spinning oil, the polyester filament yarn POY spinning oil prepared by the invention has the advantages of good thermal oxidation stability, less fuming amount and difficulty in coking.

Description

Technical Field

[0001] The invention relates to the technical field of spinning, and in particular to a polyester filament POY spinning oil containing a low acid value and high flash point alkyl-terminated polyether and a preparation method thereof. Background Art

[0002] With the emergence of high-speed spinning technology and spinning-drawing integrated spinning technology, the requirements for high-performance chemical fiber oils are getting higher and higher. Traditional oils with mineral oil as the main component can no longer meet the needs of the rapid development of spinning technology. Polyether substances have gradually become the main monomers for oil development due to their excellent lubricity and heat resistance. In the high-speed spinning process of chemical fibers, high process conditions are required, especially the thermal and oxygen stability of the spinning oil products, otherwise there will be spots or coking in the subsequent processing technology, resulting in a decrease in dyeing rate. Due to the special requirements of high-speed spinning oils, the polyether used must have good thermal and oxygen stability and smoothness. In the process of polyether molecular structure design and preparation technology, in order to make the polyether have certain special properties, its molecular structure and process will be optimized and modified.

[0003] Traditional polyethers used for spinning oils contain hydroxyl groups at the end and have poor thermal oxygen stability. After alkyl end-capping, the hydroxyl groups at the end of the polyether are converted into alkyl groups. Compared with hydroxyl-containing polyethers, the alkyl-end-capped polyethers are more resistant to acids, alkalis and salts, and have the characteristics of low surface tension, low cloud point, low viscosity, low pour point and higher viscosity index. They have better thermal oxygen stability and can achieve complete decomposition faster at the same heating rate. However, when alkyl-end-capped polyethers are used to prepare spinning oils, there is still a problem of poor thermal oxygen stability, and there is an urgent need to further improve the thermal oxygen stability of spinning oils. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a polyester filament POY spinning oil containing a low acid value and high flash point alkyl-terminated polyether and a preparation method thereof. Compared with traditional terminated polyether spinning oils, the polyester filament POY spinning oil prepared by the present invention has good thermal oxygen stability, low smoke emission, is not easy to coke, can be quickly and completely decomposed at a relatively high temperature, and ensures that there is no residue on the hot plate.

[0005] The technical solution of the present invention is:

[0006] On the one hand, the present invention provides a polyester filament POY spinning oil containing a low acid value and high flash point alkyl-terminated polyether, comprising the following components in percentage by mass: 50-70% polyether, 20-40% emulsifier, 1-3% antistatic agent, 5-21% sizing agent, and 4-15% additive; wherein the acid value of the polyether is <0.03 mgKOH / g, and the flash point is >245°C.

[0007] Preferably, the polyether is polyether 1150, polyether 1100 or polyether 1050.

[0008] Preferably, the emulsifier is sodium alkyl sulfonate.

[0009] Preferably, the antistatic agent is polyoxyethylene alkyl phosphate methyl salt.

[0010] Preferably, the sizing agent is 3-15% polyethylene glycol laurate and 2-6% castor oil polyoxyethylene.

[0011] Preferably, the additive is polyoxyethylene trimethylol trifatty acid ester.

[0012] On the other hand, the present invention provides a method for preparing the above-mentioned polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether, wherein each component is added into a stirring kettle in sequence, stirred evenly and then filtered to obtain the polyester filament POY spinning oil.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The low acid value and high flash point alkyl-terminated polyether used in the present invention has better thermal oxygen stability than general polyether, and under the same heating rate, the former can reach complete decomposition faster after reaching the decomposition temperature, and the residual amount is small. The polyester filament POY spinning oil obtained by compounding the low acid value and high flash point alkyl-terminated polyether of the present invention has better spinnability than the polyester filament POY spinning oil compounded with general polyether, has good thermal oxygen stability, small smoke amount, is not easy to coke, can be quickly and completely decomposed at a relatively high temperature, and ensures that there is no residue on the hot plate. DETAILED DESCRIPTION

[0015] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0016] Example 1

[0017] The polyester filament POY spinning oil of this embodiment includes the following components in percentage by weight: polyether (polyether 1150, Shanghai Dongda Chemical Co., Ltd., 40°C kinematic viscosity 150mm 2 / s, acid value 0.025mgKOH / g, flash point 250℃) 50%, sodium alkyl sulfonate 40%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 3%, castor oil polyoxyethylene ester 2%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0018] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0019] Example 2

[0020] The polyester filament POY spinning oil of this embodiment includes the following components in percentage by weight: polyether (polyether 1100, Shanghai Dongda Chemical Co., Ltd., 40°C kinematic viscosity 100mm 2 / s, acid value 0.023mgKOH / g, flash point 248℃) 60%, sodium alkyl sulfonate 25%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 5%, castor oil polyoxyethylene ester 5%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0021] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0022] Example 3

[0023] The polyester filament POY spinning oil of this embodiment includes the following components in percentage by weight: polyether (polyether 1050, Shanghai Dongda Chemical Co., Ltd., 40°C kinematic viscosity 50mm 2 / s, acid value 0.28mgKOH / g, flash point 246℃) 70%, sodium alkyl sulfonate 20%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 3%, castor oil polyoxyethylene ester 2%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0024] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0025] Comparative Example 1

[0026] The polyester filament POY spinning oil of Comparative Example 1 includes the following components in percentage by weight: polyether (40°C kinematic viscosity 150 mm 2 / s, acid value 0.08mgKOH / g, flash point 218℃) 50%, sodium alkyl sulfonate 40%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 3%, castor oil polyoxyethylene ester 2%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0027] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0028] Comparative Example 2

[0029] The polyester filament POY spinning oil of Comparative Example 2 includes the following components in percentage by weight: polyether (40°C kinematic viscosity 100 mm 2 / s, acid value 0.092mgKOH / g, flash point 215℃) 60%, sodium alkyl sulfonate 25%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 5%, castor oil polyoxyethylene ester 5%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0030] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0031] Comparative Example 3

[0032] The polyester filament POY spinning oil of Comparative Example 3 includes the following components in percentage by weight: polyether (40°C kinematic viscosity 50 mm 2 / s, acid value 0.094mgKOH / g, flash point 210℃) 70%, sodium alkyl sulfonate 20%, polyoxyethylene alkyl phosphate methyl salt 1%, polyethylene glycol laurate 3%, castor oil polyoxyethylene ester 2%, polyoxyethylene trihydroxymethyl trifatty acid ester 4%.

[0033] After weighing in the above order, each component is added into the stirring kettle in turn, stirred for 1 hour and then filtered to obtain the polyester filament POY spinning oil.

[0034] The polyethers in Examples 1-3 and Comparative Examples 1-3 were subjected to thermogravimetric analysis under aerobic conditions. The results are shown in Table 1:

[0035] Table 1 Thermogravimetric analysis results of the polyethers in Examples 1-3 and Comparative Examples 1-3

[0036]

[0037] It can be seen from Table 1 that, compared with traditional polyethers, the polyether with low acid value and high flash point used in the present invention has good thermal oxidation stability and can be quickly and completely decomposed at relatively high temperatures to ensure that there is no residue.

[0038] The same weight of the polyester filament POY spinning oil prepared in Examples 1-3 and Comparative Examples 1-3 was weighed respectively, and placed in a 250° C. boiling furnace for 12 hours to observe the smoke and coking conditions. The observation results are shown in Table 2:

[0039] Table 2 Observation results of smoke and coking of polyester filament POY spinning oils of Examples 1-3 and Comparative Examples 1-3

[0040] Examples and Comparative Examples Smoking Coking Example 1 Less smoke Dark yellow liquid Example 2 Less smoke Dark yellow liquid Example 3 Less smoke Dark yellow liquid Comparative Example 1 Smoking a lot Black coking Comparative Example 2 Smoking a lot Black coking Comparative Example 3 Smoking a lot Black coking

[0041] It can be seen from Table 2 that, compared with the traditional end-capped polyether spinning oil, the polyester filament POY spinning oil prepared by the present invention has good thermal oxygen stability, less smoke generation, and is not easy to coke.

Claims

1. A polyester filament POY spinning oil containing a low acid value, high flash point alkyl-terminated polyether, characterized in that: The invention comprises the following components in percentage by mass: 50-70% of polyether, 20-40% of emulsifier, 1-3% of antistatic agent, 5-21% of sizing agent and 4-15% of additive; wherein the acid value of the polyether is less than 0.03mgKOH / g and the flash point is greater than 245°C.

2. The polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether according to claim 1, characterized in that: The polyether is polyether 1150, polyether 1100 or polyether 1050.

3. The polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether according to claim 1, characterized in that: The emulsifier is sodium alkyl sulfonate.

4. The polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether according to claim 1, characterized in that: The antistatic agent is polyoxyethylene alkyl phosphate methyl salt.

5. The polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether according to claim 1, characterized in that: The sizing agent is 3-15% of polyethylene glycol laurate and 2-6% of castor oil polyoxyethylene.

6. The polyester filament POY spinning oil containing low acid value and high flash point alkyl-terminated polyether according to claim 1, characterized in that: The additive is polyoxyethylene trimethylol trifatty acid ester.

7. The method for preparing a polyester filament POY spinning oil containing a low acid value and high flash point alkyl-terminated polyether according to any one of claims 1 to 6, characterized in that: The components are added into a stirring kettle in sequence, stirred evenly and then filtered to obtain the polyester filament POY spinning oil.

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