Multifunctional polyester type high-temperature leveling agent and preparation method thereof

Abstract

The invention belongs to the technical field of textile auxiliaries, and particularly discloses a multifunctional polyester type high-temperature leveling agent and a preparation method thereof.The leveling agent is prepared from, by mass, 1.5-2.5 parts of ester exchange catalyst, 5-25 parts of polyhydric alcohol, 0.5-1.5 parts of esterification catalyst, 3-40 parts of fatty acid, 15-30 parts of solvent, 20-40 parts of hydrophilic polyether chain segment and 20-40 parts of benzene-containing polyester chain segment. According to the multifunctional polyester type high-temperature leveling agent and the preparation method thereof, the prepared leveling agent has the effects of dispersing and solubilizing a dye, preventing a fabric from being scratched in the washing process, performing hydrophilic soft modification on the surface and the like, and due to the excellent dispersion and solubilization stability of the leveling agent in the full-temperature section, the heating rate can be effectively increased; the production speed is increased, wrinkles and scratches caused in the rapid temperature rising process of the fabric can be effectively prevented, and meanwhile the fabric is endowed with good hydrophilic and soft performance.

Description

Technical Field

[0001] The invention relates to the technical field of textile auxiliaries, in particular to a multifunctional polyester high-temperature leveling agent and a preparation method thereof. Background Art

[0002] Polyester fiber is the largest synthetic fiber in China and is widely used in clothing and industrial fabrics. Disperse dyeing is the characteristic dyeing method for polyester and its blended fibers. Its dyeing process has not changed much for decades. However, with the intensification of international trade, the requirements for the functional properties of fabrics have increased and the processing costs have been reduced, process optimization and combination innovation have become the only way.

[0003] The dyeing process of polyester fabric is to color it at a high temperature of 130℃. With the requirements of processing costs and energy conservation and emission reduction, the amount of blanks is gradually increasing, and the heating rate is gradually increasing. At the same time, quality problems such as creases and color differences on the fabric surface frequently occur. In the new environment, new requirements, and new processing status, in order to solve the current processing demands of printing and dyeing factories, new auxiliary agent matching solutions must be effectively implemented.

[0004] Although polyester fabric is the most widely processed fabric, due to its low added value, a large number of printing and dyeing processing industries have been transferred to Southeast Asia. Therefore, improving its functional additional properties has become a new trend in the processing of polyester and its blended fabrics. The improvement of hydrophilicity and the improvement of hand feel, especially in sports fabrics, have shown good additional properties, which has greatly improved my country's competitiveness in the processing of polyester and its blended fabrics. At the same time, due to the demand for processing efficiency, it has gradually become a trend to take into account functional properties while dyeing. Therefore, the development of new dispersing and leveling agents has become a necessity. While meeting the efficiency requirements, it can bring functional properties such as hydrophilicity and softness, greatly improving the added value of fabrics, and has a very broad application prospect. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional polyester high-temperature leveling agent and a preparation method thereof. The prepared leveling agent has the effects of dispersing and solubilizing dyes, preventing fabrics from being scratched during washing, and modifying the surface hydrophilically and softly. Its excellent dispersion and solubilization stability in the entire temperature range can effectively accelerate the heating rate, improve the production speed, effectively prevent wrinkles and scratches caused by the rapid heating process of the fabric, and at the same time give the fabric good hydrophilic and soft properties.

[0006] To achieve the above object, the present invention provides a multifunctional polyester high-temperature leveling agent, comprising the following raw materials in parts by weight: 1.5-2.5 parts of an ester exchange catalyst, 5-25 parts of a polyol, 0.5-1.5 parts of an esterification catalyst, 3-30 parts of a fatty acid, 15-30 parts of a solvent, 20-40 parts of a hydrophilic polyether segment, and 20-40 parts of a benzene-containing polyester segment; the structural formula of the polyester high-temperature leveling agent is as follows:

[0007]

[0008] Among them, a, b, c, and d are all greater than 2.

[0009] Preferably, the transesterification catalyst is one or more of zinc acetate and calcium acetate.

[0010] Preferably, the polyol is one or more of sorbitol, erythritol and mannitol.

[0011] Preferably, the esterification catalyst is one or more of ammonium bisulfate and epoxy heteropoly acid.

[0012] Preferably, the fatty acid is one or more of palmitic acid, oleic acid, erucic acid, and stearic acid.

[0013] Preferably, the solvent is one or more of ethylene glycol, ethylene glycol monobutyl ether, and pure water.

[0014] Preferably, the hydrophilic polyether segment is a block polyether of ethylene oxide and propylene oxide.

[0015] Preferably, the benzene-containing polyester chain segment is dimethyl sodium sulfonate isophthalate and dimethyl terephthalate.

[0016] A method for preparing a multifunctional polyester high-temperature leveling agent comprises the following steps:

[0017] S1. Add fatty acid and polyol to a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, heat to 60-80°C, stir well, and pass nitrogen to drive out the air;

[0018] S2. After the air is driven out, add the esterification catalyst, turn on the vacuum pump, slowly increase the temperature to 160-180°C, and keep it warm for 2-5h;

[0019] S3, cool the above reactants to 40-50°C, take them out for use, add the benzene-containing polyester segment and the hydrophilic polyether segment to the reaction flask in a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, and add the product of step S2, heat to 80-100°C, stir well, and pass nitrogen to drive out the air;

[0020] S4. After the air is driven out, add the transesterification catalyst, turn on the vacuum pump, slowly increase the temperature to 190-220°C, and keep it warm for 2-5 hours;

[0021] S5. Turn off the vacuum pump, turn on the nitrogen, slowly cool down to 40-50°C, add the solvent, stir well and obtain the polyester type high temperature leveling agent.

[0022] The advantages and beneficial effects of the present invention using the above-mentioned multifunctional polyester high-temperature leveling agent and its preparation method are:

[0023] 1. The high-temperature leveling agent containing polymerizable fatty acid ester and benzoic acid ester synthesized by the present invention has the effects of dispersing and solubilizing dyes, preventing fabrics from being scratched during washing, and modifying the surface hydrophilically and softly.

[0024] 2. The fatty acid ester structure contained in the high temperature leveling agent structure of the present invention is a polymeric structure, which can effectively reduce the formation of foam while having good surface activity. Combined with the high similarity of benzoic acid ester and polyester fabric structure, it can be effectively adsorbed on the fabric surface to form a protective film with a relatively low friction coefficient, which plays the role of anti-scratch and softening of the fabric. The hydrophilic polyethers of different segment lengths can be effectively regulated to adjust the hydrophilicity and lipophilicity of the compound structure. For the dye in the fabric dyeing process, the fatty acid ester structure can give the dye a good dispersibility performance, effectively prevent the formation of color stains, and the structure of benzoic acid ester can effectively increase the volume of the dye in the initial stage of dyeing, thereby significantly improving the rate of initial heating, and improving the efficiency of dyeing processing. It can be adapted to more dyes, fabrics and equipment by adjusting the hydrophilicity.

[0025] 3. The high-temperature leveling agent of the present invention truly achieves multiple functions in one dose, which greatly improves the efficiency while giving the fabric more functional properties, and has great promotion value.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a dispersion performance test chart of the high-temperature leveling agent of Example 1 and a commercially available conventional leveling agent using a suction filtration method of the present invention, wherein A is the high-temperature leveling agent prepared in Example 1, B is a commercially available conventional leveling agent, and C is a blank. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0029] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0030] Example 1

[0031] A multifunctional polyester high-temperature leveling agent comprises the following raw materials in parts by weight: 2 parts of an ester exchange catalyst, 18 parts of a polyol, 1 part of an esterification catalyst, 35 parts of a fatty acid, 30 parts of a solvent, 30 parts of a hydrophilic polyether segment, and 27 parts of a benzene-containing polyester segment; the structural formula of the polyester high-temperature leveling agent is as follows:

[0032]

[0033] Among them, a, b, c, and d are all greater than 2.

[0034] The ester exchange catalyst is 2 parts of zinc acetate.

[0035] The polyols are 12 parts of sorbitol and 6 parts of erythritol.

[0036] The esterification catalyst is 1 part of ammonium hydrogen sulfate.

[0037] The fatty acids are 20 parts of palmitic acid and 15 parts of oleic acid.

[0038] The solvent is 10 parts of ethylene glycol and 20 parts of pure water.

[0039] The hydrophilic polyether segment is 30 parts of block polyether of ethylene oxide and propylene oxide.

[0040] The benzene-containing polyester chain segment is 15 parts of sodium dimethyl sulfonate isophthalate and 12 parts of dimethyl terephthalate.

[0041] A method for preparing a multifunctional polyester high-temperature leveling agent comprises the following steps:

[0042] S1. Add fatty acid and polyol in required amount to a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, heat to 60-80°C, stir well, and pass nitrogen to drive out air;

[0043] S2. After the air is driven out, add the esterification catalyst, turn on the vacuum pump, slowly increase the temperature to 160-180°C, and keep it warm for 2-5h;

[0044] S3, cool the above reactants to 40-50°C, take them out for use, add the benzene-containing polyester segment and the hydrophilic polyether segment to the reaction flask in a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, and add the product of step S2, heat to 80-100°C, stir well, and pass nitrogen to drive out the air;

[0045] S4. After the air is driven out, add the transesterification catalyst, turn on the vacuum pump, slowly increase the temperature to 190-220°C, and keep it warm for 2-5 hours;

[0046] S5. Turn off the vacuum pump, turn on the nitrogen, slowly cool down to 40-50°C, add the solvent, stir well and obtain the polyester type high temperature leveling agent.

[0047] Example 2

[0048] A multifunctional polyester high-temperature leveling agent, comprising the following raw materials in parts by weight: 2 parts of an ester exchange catalyst, 19 parts of a polyol, 1 part of an esterification catalyst, 18 parts of a fatty acid, 20 parts of a solvent, 25 parts of a hydrophilic polyether chain segment, and 24 parts of a benzene-containing polyester chain segment;

[0049] The transesterification catalyst is 2 parts of calcium acetate.

[0050] The polyols are 18 parts of erythritol and 7 parts of mannitol.

[0051] The esterification catalyst is 1 part of epoxy heteropoly acid.

[0052] The fatty acids are 8 parts of palmitic acid, 4 parts of oleic acid, and 6 parts of stearic acid.

[0053] The solvent is 10 parts of ethylene glycol monobutyl ether and 10 parts of pure water.

[0054] The hydrophilic polyether segment is 25 parts of block polyether of ethylene oxide and propylene oxide.

[0055] The benzene-containing polyester chain segment is 18 parts of sodium dimethyl sulfonate isophthalate and 6 parts of dimethyl terephthalate.

[0056] A method for preparing a multifunctional polyester high-temperature leveling agent comprises the following steps:

[0057] S1. Add fatty acid and polyol in required amount to a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, heat to 60-80°C, stir well, and pass nitrogen to drive out air;

[0058] S2. After the air is driven out, add the esterification catalyst, turn on the vacuum pump, slowly increase the temperature to 160-180°C, and keep it warm for 2-5h;

[0059] S3, cool the above reactants to 40-50°C, take them out for use, add the benzene-containing polyester segment and the hydrophilic polyether segment to the reaction flask in a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, and add the product of step S2, heat to 80-100°C, stir well, and pass nitrogen to drive out the air;

[0060] S4. After the air is driven out, add the transesterification catalyst, turn on the vacuum pump, slowly increase the temperature to 190-220°C, and keep it warm for 2-5 hours;

[0061] S5. Turn off the vacuum pump, turn on the nitrogen, slowly cool down to 40-50°C, add the solvent, stir well and obtain the polyester type high temperature leveling agent.

[0062] The performance test was conducted on the high temperature leveling agent of Example 1 and the conventional leveling agent available on the market. Polyester knitted fabric was dyed with the leveling agent of Example 1 and the conventional leveling agent available on the market, and then dried. The hydrophilicity was tested by the water drop penetration method. A drop of water was dropped on the surface of the fabric. The time it takes for the fabric to completely wet the fabric indicates its hydrophilicity. The shorter the penetration time, the better its hydrophilicity, and the longer the penetration time, the worse its hydrophilicity. The improvement effect of the hydrophilicity of polyester is shown in Table 1.

[0063] Table 1 Hydrophilicity effect

[0064]

[0065] The dispersion performance of the high temperature leveling agent of Example 1 and the conventional leveling agent on the market were tested by suction filtration. The results are as follows: Figure 1 As shown, A is the high-temperature leveling agent prepared in Example 1, B is a conventional leveling agent on the market, and C is blank, indicating that the dispersibility of the leveling agent of the present invention is significantly better than that of conventional products on the market, and the hydrophilicity of the fabric is significantly improved after use.

[0066] Therefore, the present invention adopts the above-mentioned multifunctional polyester high-temperature leveling agent and its preparation method. The prepared leveling agent has the effects of dispersing and solubilizing dyes, preventing fabrics from being scratched during washing, and hydrophilic and soft modification of the surface. Its excellent dispersion and solubilization stability in the entire temperature range can effectively accelerate the heating rate, improve the production speed, and effectively prevent wrinkles and scratches caused by the fabric during the rapid heating process, while giving the fabric good hydrophilic and soft properties.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A multifunctional polyester high temperature leveling agent, characterized in that: The raw materials include the following parts by weight: 1.5-2.5 parts of ester exchange catalyst, 5-25 parts of polyol, 0.5-1.5 parts of esterification catalyst, 3-40 parts of fatty acid, 15-30 parts of solvent, 20-40 parts of hydrophilic polyether chain segment, 20-40 parts of benzene-containing polyester chain segment; the structural formula of polyester type high temperature leveling agent is as follows: Among them, a, b, c, and d are all greater than 2.

2. A multifunctional polyester high temperature leveling agent according to claim 1, characterized in that: The transesterification catalyst is one or more of zinc acetate and calcium acetate.

3. A multifunctional polyester high temperature leveling agent according to claim 1, characterized in that: The polyol is one or more of sorbitol, erythritol and mannitol.

4. The multifunctional polyester high-temperature leveling agent according to claim 1, characterized in that: The esterification catalyst is one or more of ammonium hydrogen sulfate and epoxy heteropoly acid.

5. The multifunctional polyester high-temperature leveling agent according to claim 1, characterized in that: The fatty acid is one or more of palmitic acid, oleic acid, erucic acid and stearic acid.

6. The multifunctional polyester high-temperature leveling agent according to claim 1, characterized in that: The solvent is one or more of ethylene glycol, ethylene glycol monobutyl ether and pure water.

7. The multifunctional polyester high-temperature leveling agent according to claim 1, characterized in that: The hydrophilic polyether segment is a block polyether of ethylene oxide and propylene oxide.

8. The multifunctional polyester high-temperature leveling agent according to claim 1, characterized in that: The benzene-containing polyester chain segments are sodium dimethyl sulfonate isophthalate and dimethyl terephthalate.

9. The method for preparing a multifunctional polyester high-temperature leveling agent according to any one of claims 1 to 8, characterized in that: The steps include: S1. Add fatty acid and polyol to a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, heat to 60-80°C, stir well, and pass nitrogen to drive out the air; S2. After the air is driven out, add the esterification catalyst, turn on the vacuum pump, slowly increase the temperature to 160-180°C, and keep it warm for 2-5h; S3, cool the above reactants to 40-50°C, take them out for use, add the benzene-containing polyester segment and the hydrophilic polyether segment to the reaction flask in a four-necked flask equipped with a thermometer, a stirrer, a constant pressure dropper and a vacuum pump, and add the product of step S2, heat to 80-100°C, stir well, and pass nitrogen to drive out the air; S4. After the air is driven out, add the transesterification catalyst, turn on the vacuum pump, slowly increase the temperature to 190-220°C, and keep it warm for 2-5h; S5. Turn off the vacuum pump, turn on the nitrogen, slowly cool down to 40-50°C, add the solvent, stir well and obtain the polyester type high temperature leveling agent.

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