Dyeing one-bath moisture absorbing and perspiration releasing agent, preparation method and application thereof

Abstract

The present invention relates to the field of moisture absorbing and perspiring agents. In order to solve the problem of poor washing resistance of moisture absorbing and perspiring agents in the prior art, a dyeing one-bath moisture absorbing and perspiring agent is disclosed, which comprises the following components in parts by weight: 80-100 parts of polyethylene glycol, 10-20 parts of ethylene glycol, 10-30 parts of fatty alcohol polyether, 15-20 parts of polyethylene terephthalate and 0.5-1 part of catalyst. The moisture absorbing and perspiring agent is stable at high temperature and can be used in the dyeing one-bath process. It can give fabrics excellent moisture absorption and quick drying properties, and has good bonding performance with fabric fibers. The fabric treated with the moisture absorbing and perspiring agent still has good hydrophilicity after washing. The present invention also provides a preparation method of the dyeing one-bath moisture absorbing and perspiring agent. The preparation method generates less wastewater, is environmentally friendly, and can realize industrialized mass production.

Description

Technical Field

[0001] The invention relates to the field of moisture absorbing and perspiration releasing agents, in particular to a dyeing one-bath moisture absorbing and perspiration releasing agent, a preparation method thereof and application thereof. Background Art

[0002] There are few strongly polar hydrophilic groups in polyester fibers, which leads to poor air permeability and moisture absorption of polyester fabrics. Sweat cannot evaporate from the body surface in time, making the wearer feel stuffy. These shortcomings of polyester deviate from consumers' increasingly high expectations and requirements for clothing comfort. Therefore, how to improve the hydrophilicity of polyester fabrics and enhance the wearing comfort of polyester fabrics has become a research hotspot in recent years.

[0003] At present, there are two main ways to improve the hydrophilicity of polyester: one is to change the conventional polyester fiber from a circular cross-section to a special-shaped cross-section, increase the specific surface area of ​​the fiber, and use the capillary phenomenon generated by the fine grooves on the fiber surface to volatilize the sweat through wicking, transmission, and diffusion; the other is to use a moisture wicking agent to hydrophilically finish the polyester fabric, and introduce hydrophilic groups on the fiber surface to improve the wearing comfort of the polyester fabric. The moisture wicking agent finishing process mainly includes the post-dyeing impregnation method, the padding method, and the dyeing bath method. Among them, the dyeing bath method does not increase the finishing process and the process is simple and easy to control, so it is widely used in the printing and dyeing industry. However, the existing moisture wicking agents have poor washing resistance. Polyester fabrics processed with moisture wicking agents usually face the problem of decreased hydrophilicity after washing. The development of moisture wicking agents with good washing resistance has become an industry consensus.

[0004] For example, in the Chinese patent literature, the publication number CN101265664A, "Moisture wicking comfortable finishing agent and its production process and application", the formula of the moisture wicking comfortable finishing agent includes: polyethylene glycol, ethylene glycol, polyether and dimethyl terephthalate; a two-step continuous production process is used, the first step is esterification, polyethylene glycol, ethylene glycol, polyether and dimethyl terephthalate are added to the reactor, and the esterification reaction is carried out under the action of a catalyst; the second step is to transport the material generated after the esterification reaction to a polymerization kettle, and polymerize under high temperature, vacuum and the action of a catalyst to generate a high molecular weight polyester / polyether block copolymer with a molecular weight of 30,000 to 50,000, that is, a moisture wicking comfortable finishing agent. The moisture wicking comfortable finishing agent has good hydrophilicity, but poor washing resistance. The hydrophilicity of the fabric treated with the moisture wicking comfortable finishing agent will be greatly reduced after washing. Summary of the invention

[0005] In order to overcome the problem of poor washing resistance of moisture absorbing and perspiring agents in the prior art, the present invention provides a dyeing-in-one-bath moisture absorbing and perspiring agent, which is stable at high temperature and can be used in a dyeing-in-one-bath process, can give fabrics excellent moisture absorption and quick-drying properties, and has good bonding performance with fabric fibers. The fabric treated with the moisture absorbing and perspiring agent still has good hydrophilicity after washing. The present invention also provides a preparation method of the dyeing-in-one-bath moisture absorbing and perspiring agent, which generates less wastewater, is environmentally friendly, and can achieve industrialized mass production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A dyeing one-bath moisture absorption and perspiration release agent comprises the following components in parts by weight: 80-100 parts of polyethylene glycol, 10-20 parts of ethylene glycol, 10-30 parts of fatty alcohol polyether, 15-20 parts of polyethylene terephthalate and 0.5-1 part of a catalyst.

[0008] The invention uses polyethylene terephthalate to replace the dimethyl terephthalate in the conventional formula and reacts with polyethylene glycol, thereby reducing the amount of wastewater discharged in the preparation process; the fatty alcohol polyether is used as a capping agent to control the molecular weight of the polyester polyether and improve the dispersibility of the moisture absorption and perspiration removal agent. The invention has good high temperature stability and can be used in the dyeing bath process of fabrics, so that the treated fabrics can be soft to the touch and have hydrophilicity, antistatic properties and easy decontamination. The invention is washable, and the fabrics finished by the invention still have good hydrophilicity after multiple washings.

[0009] Preferably, the polyethylene glycol is PEG4000 and PEG1000, and the mass ratio of PEG4000 to PEG1000 is 10:(0.5-8).

[0010] Mixing PEG4000 and PEG1000 can effectively control the viscosity and water solubility of polyethylene glycol.

[0011] Preferably, the catalyst is one or more of zinc acetate, manganese acetate, cobalt acetate, magnesium acetate and calcium acetate.

[0012] A method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent comprises the following steps:

[0013] (1) heating polyethylene glycol and mixing it with fatty alcohol polyether and ethylene glycol for reaction;

[0014] (2) adding polyethylene terephthalate and a catalyst to the reactant obtained in step (1), heating the mixture to react, and cooling the mixture after the reaction is completed to obtain a dyeing-in-one-bath moisture absorbing and perspiration-releasing agent.

[0015] In the preparation method of the present invention, fatty alcohol polyether and polyethylene glycol are firstly formed into a prepolymer, polyethylene terephthalate and a catalyst are then added to carry out an esterification reaction, and finally polycondensation is carried out to obtain a dyeing one-bath moisture absorbing and perspiration releasing agent.

[0016] Preferably, the step (1) is to heat the polyethylene glycol to 60-80° C., add the fatty alcohol polyether, mix, and then heat to 80-100° C. to react for 0.5-1 h.

[0017] Preferably, the reaction process of step (1) is carried out under a vacuum environment.

[0018] Preferably, the vacuum degree of the vacuum environment in step (1) is greater than 0.01 MPa.

[0019] Preferably, the step (2) is to add polyethylene terephthalate, ethylene glycol and a catalyst to the reactant obtained in step (1), raise the temperature to 150-180° C. and react for 3-5 hours, and cool after the reaction to obtain the dyeing one-bath moisture wicking agent.

[0020] Preferably, the temperature-raising reaction process in step (2) is carried out under the protection of an inert gas, and the gas pressure during the reaction is 0.2 to 0.5 MPa.

[0021] The reaction rate can be increased by carrying out the esterification reaction under a gas pressure of 0.2 to 0.5 MPa.

[0022] The invention discloses an application of a dyeing-in-one-bath moisture absorption and perspiration releasing agent in a dyeing-in-one-bath finishing process of fabrics, wherein the dosage of the dyeing-in-one-bath moisture absorption and perspiration releasing agent is 0.2-5% of the mass of the fabric.

[0023] The invention has good high temperature stability and can be used to finish fabrics in a dyeing bath process.

[0024] Therefore, the present invention has the following beneficial effects: (1) it can be widely used in the finishing of polyester fabrics, so that the fabrics have good hydrophilicity, easy stain removal and soft hand feel; (2) the present invention is washable and can keep the fabric hydrophilic for a long time; (3) it has good stability and can be dyed in the same bath to reduce fabric scratches, and can also be used for impregnation; (4) the amount of wastewater discharged during the preparation process is small, and the process is green and environmentally friendly. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific implementation methods.

[0026] Example 1

[0027] A dyeing one-bath moisture absorption and perspiration release agent, comprising 80 parts by weight of PEG-4000, 20 parts by weight of PEG-1000, 15 parts by weight of ethylene glycol, 20 parts by weight of fatty alcohol polyether (AEO3), 20 parts by weight of polyethylene terephthalate (polyester chips, SD500) and 0.5 parts by weight of cobalt acetate, is prepared by the following steps:

[0028] (1) Weigh each component according to the proportion;

[0029] (2) Add PEG-4000 and pump in PEG-1000 into an emulsifying kettle, heat to 60°C to melt and mix evenly, then add fatty alcohol polyether and mix, evacuate to a vacuum degree of 0.09 MPa, and heat to 100°C to react for 0.5 h;

[0030] (3) Add polyethylene terephthalate, ethylene glycol and cobalt acetate to an emulsifying kettle, introduce nitrogen until the pressure in the kettle is 0.2 MPa, heat to 160° C. and keep warm for 4 h. After the reaction is completed, cool to 60° C., transfer to a stainless steel tray and cool to room temperature. After the material is cooled and solidified, it is crushed to obtain a dyeing and bathing moisture wicking agent.

[0031] Example 2

[0032] A dyeing one-bath moisture absorption and perspiration release agent, comprising 50 parts by weight of PEG-4000, 40 parts by weight of PEG-1000, 15 parts by weight of ethylene glycol, 15 parts by weight of AEO3, 20 parts by weight of polyester chips (SD500) and 0.5 parts by weight of cobalt acetate, is prepared by the following steps:

[0033] (1) Weigh each component according to the proportion;

[0034] (2) Add PEG-4000 and pump in PEG-1000 into an emulsifying kettle, heat to 60°C to melt and mix evenly, then add fatty alcohol polyether and mix, evacuate to a vacuum degree of 0.09 MPa, and heat to 100°C to react for 0.5 h;

[0035] (3) Add polyethylene terephthalate, ethylene glycol and cobalt acetate to an emulsifying kettle, introduce nitrogen until the pressure in the kettle is 0.2 MPa, heat to 160° C. and keep warm for 4 h. After the reaction is completed, cool to 60° C., transfer to a stainless steel tray and cool to room temperature. After the material is cooled and solidified, it is crushed to obtain a dyeing and bathing moisture wicking agent.

[0036] Comparative Example 1

[0037] A dyeing one-bath moisture absorption and perspiration release agent, comprising 100 parts by weight of PEG-4000, 15 parts by weight of ethylene glycol, 20 parts by weight of AEO3, 20 parts by weight of polyester chips (SD500) and 0.5 parts by weight of cobalt acetate, is prepared by the following steps:

[0038] (1) Weigh each component according to the proportion;

[0039] (2) Add PEG-4000 into an emulsifying kettle, heat to 60°C to melt and mix evenly, then add fatty alcohol polyether and mix, evacuate to a vacuum degree of 0.09 MPa, and heat to 100°C to react for 0.5 h;

[0040] (3) Add polyethylene terephthalate, ethylene glycol and cobalt acetate to an emulsifying kettle, introduce nitrogen until the pressure in the kettle is 0.2 MPa, heat to 160° C. and keep warm for 4 h. After the reaction is completed, cool to 60° C., transfer to a stainless steel tray and cool to room temperature. After the material is cooled and solidified, it is crushed to obtain a dyeing and bathing moisture wicking agent.

[0041] Comparative Example 2

[0042] A dyeing one-bath moisture absorption and perspiration release agent, comprising 100 parts by weight of PEG-1000, 15 parts by weight of ethylene glycol, 20 parts by weight of AEO3, 20 parts by weight of polyester chips (SD500) and 0.5 parts by weight of cobalt acetate, is prepared by the following steps:

[0043] (1) Weigh each component according to the proportion;

[0044] (2) Add PEG-4000 into an emulsifying kettle, heat to 60°C to melt and mix evenly, then add fatty alcohol polyether and mix, evacuate to a vacuum degree of 0.09 MPa, and heat to 100°C to react for 0.5 h;

[0045] (3) Add polyethylene terephthalate, ethylene glycol and cobalt acetate to an emulsifying kettle, introduce nitrogen until the pressure in the kettle is 0.2 MPa, heat to 160° C. and keep warm for 4 h. After the reaction is completed, cool to 60° C., transfer to a stainless steel tray and cool to room temperature. After the material is cooled and solidified, it is crushed to obtain a dyeing and bathing moisture wicking agent.

[0046] Comparative Example 3

[0047] A dyeing one-bath moisture absorption and perspiration release agent, comprising 80 parts by weight of PEG-4000, 20 parts by weight of PEG-1000, 15 parts by weight of ethylene glycol, 20 parts by weight of polyester chips (SD500) and 0.5 parts by weight of cobalt acetate, is prepared by the following steps:

[0048] (1) Weigh each component according to the proportion;

[0049] (2) PEG-4000, polyester chips, ethylene glycol and cobalt acetate are added to an emulsifying kettle, and PEG-1000 is pumped in. Nitrogen is introduced until the pressure in the kettle reaches 0.2 MPa. The kettle is heated to 160°C and kept warm for 4 hours. After the reaction is completed, the kettle is cooled to 60°C, transferred to a stainless steel tray and cooled to room temperature. After the material is cooled and solidified, it is crushed to obtain a dyeing bath moisture wicking agent.

[0050] The ionicity, acid value and viscosity of the moisture absorbing and perspiration expelling agents obtained in each embodiment and comparative example were measured according to the measurement methods described in HGT 4267-2011 "Determination of ionicity of textile dyeing and finishing auxiliaries", HGT 4443-2012 "Determination of viscosity of textile dyeing and finishing auxiliaries" and GBT 1668-2008 "Determination of acid value and acidity of plasticizers", and the moisture absorbing and perspiration expelling agents obtained in each embodiment and comparative example were prepared into a 30 g / L aqueous solution, heated to 100° C. and maintained for 30 min, and the high temperature stability thereof was tested. The test results are shown in Table 1.

[0051] Table 1. Properties of moisture wicking agents

[0052]

[0053]

[0054] As shown in Table 1, the present invention is a nonionic light yellow solid, which is stable at high temperature and not easy to agglomerate, and can be used for dyeing in the same bath. In Comparative Example 2, no end-capping agent is used, and its dispersibility is poor and it is easy to agglomerate at high temperature.

[0055] The polyester fabric was finished using the moisture absorption and perspiration agent obtained in each embodiment and comparative example. The concentration of the moisture absorption and perspiration agent (to the weight of the polyester fabric) was 2.5%, the bath ratio was 1:30, and the finishing process was to heat up to 90°C at 2°C / min, then heat up to 130°C at 1°C / min and keep warm for 30 minutes, and then cool down naturally. The hydrophilicity and easy stain removal of the polyester fabric were determined according to the determination methods of AATCC 130-2018 "Easy stain removal performance oil release method" and AATCC79-2018 "Determination of water absorption of textiles", wherein the oil used in the easy stain removal determination was corn oil, the washing procedure was Normal, the washing time was 12 minutes, and the drying method was oven drying for 45 minutes. The determination results are shown in Table 2.

[0056] Table 2. Hydrophilicity and stain release properties of polyester fabrics

[0057]

[0058] As shown in Table 2, the present invention can effectively improve the decontamination and hydrophilicity of polyester fabrics, and has good washing resistance. The hydrophilicity of the polyester fabric after finishing does not decrease significantly after 10 washings. In Comparative Example 1, only PEG-4000 is used, and its viscosity is greater than that of Example 1, and the effect of improving the hydrophilicity of polyester fabrics is worse than that of Example 1; and in Comparative Example 2, only PEG-1000 is used, and its decontamination is reduced. In Comparative Example 3, the molecular weight of the moisture wicking agent is relatively large, and its treatment effect on polyester fabrics in the dyeing bath is relatively poor.

Claims

1. A dyeing one-bath moisture absorbing and perspiration releasing agent, characterized in that: The raw materials include the following components in parts by weight: 80-100 parts of polyethylene glycol, 10-20 parts of ethylene glycol, 10-30 parts of fatty alcohol polyether, 15-20 parts of polyethylene terephthalate and 0.5-1 part of catalyst; The dyeing one-bath moisture absorption and perspiration release agent is prepared by reacting a reactant of polyethylene glycol and fatty alcohol polyether with polyethylene terephthalate, ethylene glycol and a catalyst at 150-180°C for 3-5 hours, wherein the reactant of polyethylene glycol and fatty alcohol polyether is prepared by reacting polyethylene glycol at 60-80°C and fatty alcohol polyether at 80-100°C for 0.5-1 hour; The polyethylene glycol comprises 50 to 80 parts of PEG-4000 and 20 to 40 parts of PEG-1000 by weight.

2. The dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 1, characterized in that: The mass ratio of PEG4000 and PEG1000 is 10:(0.5~8).

3. The dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 1, characterized in that: The catalyst is one or more of zinc acetate, manganese acetate, cobalt acetate, magnesium acetate and calcium acetate.

4. A method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to any one of claims 1 to 3, characterized in that: The steps include: (1) heating polyethylene glycol and mixing it with fatty alcohol polyether to react; (2) Adding polyethylene terephthalate, ethylene glycol and a catalyst to the reactant obtained in step (1), heating the mixture to react, and cooling the mixture after the reaction is completed to obtain a dyeing one-bath moisture absorbing and perspiration releasing agent.

5. The method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 4, characterized in that: The step (1) is to heat polyethylene glycol to 60-80° C., add fatty alcohol polyether, mix, and then heat to 80-100° C. to react for 0.5-1 h.

6. The method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 4 or 5, characterized in that: The reaction process of step (1) is carried out under a vacuum environment.

7. The method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 6, characterized in that: The vacuum degree of the vacuum environment in step (1) is greater than 0.01 MPa.

8. The method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 4, characterized in that: The step (2) is to add polyethylene terephthalate, ethylene glycol and a catalyst to the reactant obtained in the step (1), raise the temperature to 150-180° C. and react for 3-5 hours, and cool after the reaction to obtain a dyeing one-bath moisture absorbing and perspiration-releasing agent.

9. The method for preparing a dyeing one-bath moisture absorbing and perspiration releasing agent according to claim 4 or 8, characterized in that: The temperature-raising reaction process in step (2) is carried out under the protection of an inert gas, and the gas pressure during the reaction is 0.2-0.5 MPa.

10. Use of the dyeing-in-one-bath moisture absorption and perspiration removal agent according to any one of claims 1 to 3 in a dyeing-in-one-bath finishing process of fabrics, characterized in that: The amount of the dyeing bath moisture absorption and perspiration agent used is 0.2-5% of the fabric mass.

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