CN112878054A - Washable polyester hydrophilic finishing agent and preparation method thereof - Google Patents
Washable polyester hydrophilic finishing agent and preparation method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/507—Polyesters
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6854—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/6856—Dicarboxylic acids and dihydroxy compounds
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- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
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- D06M2101/16—Synthetic fibres, other than mineral fibres
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Abstract
The application belongs to the field of hydrophilic finishing agents, and particularly relates to a washable polyester hydrophilic finishing agent and a preparation method thereof. The application provides a washable polyester hydrophilic finishing agent, which has a chemical structural formula shown as a formula I; the washable terylene hydrophilic finishing agent comprises an x unit, a y unit and a z unit which are sequentially and repeatedly connected; the number of the x units is a positive integer of 14-1000; the number of the y units is a positive integer of 1-75; the number of the z units is a positive integer of 1-30; the R is1is-CH3(ii) a The R is2is-H, -CH2CH2OH, benzylRadical or- (CH)2)nCH3Wherein n is a natural number of 0 to 18. The hydrophilic finishing agent for washable polyester and the preparation method thereof can effectively overcome the technical defect that the hydrophilicity and washability of fabrics cannot be improved simultaneously after the traditional hydrophilic finishing agent is acted on the fabrics.
Description
Technical Field
The application belongs to the field of hydrophilic finishing agents, and particularly relates to a washable polyester hydrophilic finishing agent and a preparation method thereof.
Background
In recent years, along with the increasing demand of people for wearing comfort, the technological content of the garment fabric is higher and higher. The terylene is a widely used textile fabric, but because no hydrophilic group exists in a terylene fiber molecular chain, the moisture absorption is poor, sweat is not easy to be discharged in hot weather, so that the sticking feeling is caused, bacteria are easy to breed, and static electricity is easy to accumulate in cold and dry weather, so that the performance of the clothes is reduced, and the health of a human body is influenced. In addition, the polyester fiber has a regular structure and is difficult to chemically modify, and the strength of the fiber can be seriously damaged by the common surface plasma treatment. Most of the existing hydrophilic finishing agents have poor affinity with polyester fibers, so that the hydrophilic finishing agents are wasted or a large amount of adhesives are used, and the general hydrophilic finishing agents have poor washing fastness to fabrics and reduce the hydrophilic effect in the using process. Therefore, the development of the terylene hydrophilic finishing agent with good hydrophilicity, high affinity to terylene fiber and good washing fastness has important scientific value and meets the increasingly promoted requirements of comfortable and healthy wearing.
Most of the hydrophilic finishing agents used at present are of the polyester polyether type, the polyester blocks providing the eutectic co-crystallization with the terylene providing the wash fastness and the polyether blocks providing the hydrophilicity. However, the polyester blocks are increased, the hydrophilicity is reduced, the polyether blocks are increased, the washing fastness is reduced, and the balance between the hydrophilicity and the washing fastness is difficult to achieve.
Disclosure of Invention
In view of this, the washable polyester hydrophilic finishing agent and the preparation method thereof provided by the application can effectively overcome the technical defect that the hydrophilicity and washability of the fabric cannot be improved simultaneously after the traditional hydrophilic finishing agent and the fabric are acted.
The application provides a washable polyester hydrophilic finishing agent with a chemical structural formula shown as a formula I;
the washable terylene hydrophilic finishing agent comprises an x unit, a y unit and a z unit which are sequentially and repeatedly connected; the number of the x units is a positive integer of 14-1000; the number of the y units is a positive integer of 1-75; the number of the z units is a positive integer of 1-30;
the R is1is-CH3(ii) a The R is2is-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0 to 18.
Specifically, in the washable terylene hydrophilic finishing agent shown in the formula I, an end a and an end b are hydrogen.
In a second aspect, the application provides a preparation method of a washable terylene hydrophilic finishing agent, which comprises the following steps:
mixing dimethyl terephthalate, a diol monomer composition and an ester exchange catalyst for reaction to prepare a reactant;
and mixing the reactant, polyethylene glycol, an antioxidant and a polycondensation catalyst for reaction to prepare the washable terylene hydrophilic finishing agent.
In another embodiment, the glycol monomer composition includes a cationic glycol monomer and ethylene glycol.
In another embodiment, as shown in FIGS. 3 and 4, the cationic diol monomer has a structure of formula II or/and a structure of formula III;
the R is0Selected from-Cl, -Br or-OH; the R is1Is selected from-CH3(ii) a The R is2Is selected from-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0-18;
the R is1Is selected from-CH3(ii) a The R is2Is selected from-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0 to 18.
In another embodiment, the cationic diol monomer is selected from the group consisting of 2, 2' - (methylimine) diethanol and its hydrochloride, bromate, and hydroxide salts; bis (2-hydroxyethyl) dimethylammonium chloride or a hydroxide salt thereof; n-methyldiethanolamine and its hydrochloride, bromate and hydroxide salts; n-ethyldiethanolamine and its hydrochloride, bromate and hydroxide salts; triethanolamine and its hydrochloride, bromate and hydroxide salts; methyl bis (2-hydroxyethyl) benzylamine and its hydrochloride, bromate and hydroxide salts; methyl (dihydroxyethyl) stearylamine and one or more of its hydrochloride, bromate and hydroxide salts.
In another embodiment, the cationic diol monomer is a cationic quaternary ammonium salt diol monomer, and the cationic quaternary ammonium salt structure can endow the fabric with good hydrophilicity, antistatic performance and antibacterial performance.
In another embodiment, the cationic diol monomer is selected from bis (2-hydroxyethyl) dimethylammonium chloride (BDAC).
In another embodiment, the molar ratio of the cationic diol monomer to the ethylene glycol is (0-40%): (60% to 100%).
In another embodiment, the molar ratio of the cationic diol monomer to the ethylene glycol is (10-40%): (60% to 90%).
In another embodiment, the molar ratio of the cationic diol monomer to the ethylene glycol is 25%: 75 percent.
In another embodiment, the molar ratio of the dimethyl terephthalate to the diol monomer composition is 1 (2-3).
In another embodiment, the molar ratio of the dimethyl terephthalate to the diol monomer composition is (1: 2.4).
In another embodiment, the molar ratio of the polyethylene glycol to the dimethyl terephthalate is (0.1-1): 1.
In another embodiment, the molar ratio of the polyethylene glycol to the dimethyl terephthalate is 0.5: 1.
in another embodiment, the polyethylene glycol is selected from one or more of polyethylene glycol having a number average molecular weight of 600, polyethylene glycol having a number average molecular weight of 1000, polyethylene glycol having a number average molecular weight of 1500, polyethylene glycol having a number average molecular weight of 2000, polyethylene glycol having a number average molecular weight of 3000, or polyethylene glycol having a number average molecular weight of 6000.
In another embodiment, the polyethylene glycol is selected from one or more of polyethylene glycol having a number average molecular weight of 600, polyethylene glycol having a number average molecular weight of 1500, and polyethylene glycol having a number average molecular weight of 3000.
In another embodiment, the polyethylene glycol is selected from polyethylene glycols having a number average molecular weight of 1500.
In another embodiment, the transesterification catalyst is selected from one or more of zinc acetate, aluminum chloride, zinc chloride, and titanium tetrachloride.
In another embodiment, the polycondensation catalyst is selected from one or more of antimony-based metal oxides, antimony-based alcoholates and antimony-based carboxylates.
In another embodiment, the antimony-based metal oxide is selected from antimony trioxide and/or antimony glycolate.
In another embodiment, the antioxidant is selected from one or more of triphenyl phosphite, triphenyl phosphate, antioxidant HP-136, and antioxidant 1010.
In another embodiment, the transesterification catalyst is selected from zinc acetate; the polycondensation catalyst is selected from antimony trioxide and ethylene glycol antimony; the antioxidant is selected from triphenyl phosphite or/and antioxidant 1010.
In another embodiment, the transesterification catalyst is used in an amount of 0.2% (w/w).
In another embodiment, the polycondensation catalyst is used in an amount of 0.3% (w/w).
In another embodiment, the antioxidant is present in an amount of 0.3% (w/w).
In another embodiment, the temperature of the mixed reaction of the dimethyl terephthalate, the diol monomer composition and the transesterification catalyst is 160-200 ℃, and the reaction time is 2-4 hours;
the temperature of the mixed reaction of the reactant, the polyethylene glycol, the antioxidant and the polycondensation catalyst is 200-250 ℃, and the reaction time is 3-6 hours.
In another embodiment, the temperature of the combined reaction of the dimethyl terephthalate, the glycol monomer composition, and the transesterification catalyst is 190 ℃.
In another embodiment, the temperature of the mixing reaction of the polyethylene glycol, the antioxidant and the polycondensation catalyst is 240 ℃.
In another embodiment, the mixing reaction of the reactant, the polyethylene glycol, the antioxidant and the polycondensation catalyst is a polycondensation reaction; mixing the reactant, the polyethylene glycol, the antioxidant and the polycondensation catalyst, reacting for 3-6 hours at 200-250 ℃ under the condition of vacuum pumping and keeping the vacuum degree at 85-90 kPa; finally, the washable terylene hydrophilic finishing agent is obtained through cooling and purification.
The application of the washable terylene hydrophilic finishing agent of the formula I or the washable terylene hydrophilic finishing agent prepared by the preparation method provided by the application in improving the hydrophilicity, washability, antibacterial property and electric resistance of fabrics.
Specifically, the preparation method comprises the following specific synthetic steps:
1. ester exchange reaction: firstly, adding dimethyl terephthalate DMT into a three-neck flask, gradually raising the temperature to 160-200 ℃, after the DMT is completely melted, adding a glycol monomer composition according to the molar ratio of the dimethyl terephthalate DMT to the glycol monomer composition of 1 (2-3), then adding an ester exchange catalyst, setting the temperature at 160-200 ℃ until no liquid is evaporated, preserving the temperature for 2-4 hours, and then cooling to room temperature to obtain a reactant.
2. And (3) polycondensation reaction: adding polyethylene glycol, a polycondensation catalyst and an antioxidant into reactants in an inert atmosphere according to the molar ratio of the polyethylene glycol to the dimethyl terephthalate of (0.1-1): 1. Then, vacuumizing the system, keeping the vacuum degree at 85-90 kPa, and gradually increasing the temperature to 200-250 ℃; finally, the washable terylene hydrophilic finishing agent with the formula I is obtained through cooling and purification.
The cationic polyester-polyether ternary polymerization washability polyester hydrophilic finishing agent is synthesized by taking dimethyl terephthalate, a cationic diol monomer, ethylene glycol and polyethylene glycol as raw materials through ester exchange and polycondensation, has strong affinity to negative charges on the surface of a fabric material in an aqueous solution, further enhances surface adhesion and coating cohesion due to cation-pi interaction, can realize durable washability, hydrophilic, antistatic and antibacterial properties when being applied to the polyester fabric with more aromatic rings, and can greatly reduce the use of finishing aids in the fabric finishing process. The washable polyester hydrophilic finishing agent prepared by the method can be produced in batch, is simple in finishing process, does not use other adhesives, does not use other chemicals in the process of finishing the fabric, is pollution-free, is high in utilization rate of the finishing agent based on the cation-pi interaction in an aqueous solution, reduces unnecessary waste, is good in hydrophilicity of the finished fabric, has antistatic and antibacterial performances, and has good washable performance.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a chemical structural formula of the washable terylene hydrophilic finishing agent provided by the application.
Fig. 2 is a chemical structural formula of the washable terylene hydrophilic finishing agent 1 provided in the application example 1.
FIG. 3 is a chemical structural formula of a cationic diol monomer of formula II provided in an example of the present application.
FIG. 4 is a chemical structural formula of a cationic diol monomer of formula III provided in an example herein.
Fig. 5 is a chemical structural formula of cationic diol monomer bis (2-hydroxyethyl) dimethylammonium chloride (BDAC) provided in example 1 of the present application.
Fig. 6 is a bacterial plaque graph of polyester fabric finished by the wash-resistant polyester hydrophilic finishing agent 1 provided in the example of the application after being placed in a humid environment for 20 days.
Fig. 7 is a graph of bacterial plaque after 20 days of exposure to moisture, wherein the polyester fabric is not finished with a hydrophilic finishing agent according to the examples of the present application.
Detailed Description
The application provides a washable terylene hydrophilic finishing agent and a preparation method thereof, which are used for solving the technical defect that the hydrophilicity and washability of fabrics cannot be improved simultaneously after the hydrophilic finishing agent and the fabrics act in the prior art.
The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The reagents or raw materials used in the following examples are commercially available or self-made.
The cationic diol monomer of the following examples is bis (2-hydroxyethyl) dimethylammonium chloride (BDAC), the structure of which is shown in FIG. 5.
DMT was added to a three-necked flask, heated to 160 ℃ and 200 ℃ until molten, and then the diol monomer composition (comprising the cationic diol monomer and ethylene glycol) was added under nitrogen. The transesterification catalyst is then added. Heating to 160-200 deg.C, reacting for 2-4 hours until no solvent is evaporated. Then stopping heating, and cooling to room temperature to obtain a reaction product. Polyethylene glycol, an antioxidant and a polycondensation catalyst are then added to the reactants. Performing nitrogen replacement by vacuum pumping for three times, heating to the temperature of 160-200 ℃ for melting, then performing vacuum pumping to the negative pressure of 85-90 kPa, gradually heating to the temperature of 200-250 ℃ for reaction for 3-6 hours, and cooling to the room temperature.
Example 1
The embodiment of the application provides a washable polyester hydrophilic finishing agent, and the preparation method comprises the following steps:
0.1mol of DMT (19.4g) was charged into a three-necked flask, heated to 160 ℃ to melt, and then 2.4eq of the diol monomer composition (wherein BDAC, 0.024mol, 4.08 g; ethylene glycol, 0.216mol, 13.4 g; molar ratio of BDAC to ethylene glycol was 10%: 90%) was added under nitrogen. Then 0.07g (0.2% w/w) of zinc acetate catalyst was added. Heating to 190 deg.C, and keeping the temperature for half an hour when no solvent is evaporated out. Then, the heating was stopped and the mixture was cooled to room temperature. Then PEG 150075 g, antioxidant TPP0.16g, antioxidant 10100.16 g, catalyst antimony acetate 0.16g, catalyst antimony trioxide 0.16g were added. And vacuumizing for three times, replacing with nitrogen, heating to 160 ℃ for melting, vacuumizing to 85kpa of negative pressure, gradually heating to 240 ℃, reacting for 4 hours, and cooling to room temperature. The washable terylene hydrophilic finishing agent 1 is obtained, and the chemical structure of the terylene hydrophilic finishing agent is shown in figure 2.
Example 2
The embodiment of the application provides a washable polyester hydrophilic finishing agent, and the preparation method comprises the following steps:
0.1mol of DMT (19.4g) was charged into a three-necked flask, heated to 160 ℃ until molten, and then 2.4eq of the diol monomer composition (wherein BDAC, 0.06mol, 10.18 g; ethylene glycol, 0.18mol, 11.16 g; molar ratio of BDAC to ethylene glycol 25%: 75%) was added under nitrogen. Then adding 0.08g (0.2% w/w) of catalyst zinc acetate, heating to 190 ℃, and preserving heat for half an hour when no solvent is evaporated out of the system. Then, the heating was stopped and the mixture was cooled to room temperature. Then PEG 150075 g, antioxidant TPP0.17g, antioxidant 10100.17 g, catalyst antimony acetate 0.17g, catalyst antimony trioxide 0.17g were added. And vacuumizing for three times, replacing with nitrogen, heating to 160 ℃ for melting, vacuumizing to 85kpa of negative pressure, gradually heating to 240 ℃, reacting for 4 hours, and cooling to room temperature. And obtaining the washable terylene hydrophilic finishing agent 2.
Example 3
The embodiment of the application provides a washable polyester hydrophilic finishing agent, and the preparation method comprises the following steps:
0.1mol of DMT (19.4g) was charged into a three-necked flask, heated to 160 ℃ to melt, and then 2.4eq of the diol monomer composition (wherein BDAC, 0.096mol, 16.28 g; ethylene glycol, 0.144mol, 8.92 g; molar ratio of BDAC to ethylene glycol 40%: 60%) was added under nitrogen. Then adding 0.09g (0.2% w/w) of zinc acetate as a catalyst, heating to 190 ℃, and preserving the temperature for half an hour when no solvent is evaporated out of the system. Then, the heating was stopped and the mixture was cooled to room temperature. Then PEG 150075 g, antioxidant TPP0.18g, antioxidant 10100.18 g, catalyst antimony acetate 0.18g, catalyst antimony trioxide 0.18g were added. And vacuumizing for three times, replacing with nitrogen, heating to 160 ℃, melting, vacuumizing to 85kpa of negative pressure, gradually heating to 230 ℃, reacting for 4 hours, and cooling to room temperature. Obtaining the washable terylene hydrophilic finishing agent 3.
Example 4
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the application example refers to example 1, except that the PEG1500(75g) in example 1 is replaced by PEG600(30g) to obtain the washable terylene hydrophilic finishing agent 4, and the rest steps are consistent with example 1.
Example 5
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the application example refers to example 2, except that the PEG1500(75g) in example 2 is replaced by PEG600(30g) to obtain the washable terylene hydrophilic finishing agent 5, and the rest steps are consistent with example 2.
Example 6
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the application example refers to example 3, except that PEG1500(75g) in example 3 is replaced by PEG600(30g) to obtain wash-resistant terylene hydrophilic finishing agent 6, and the rest steps are the same as example 3.
Example 7
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the examples of the present application refers to example 1, except that PEG1500(75g) in example 1 is replaced with PEG3000(150g) to obtain wash durable terylene hydrophilic finishing agent 7, and the rest of the procedure is identical to example 1.
Example 8
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the application example refers to example 2, except that the PEG1500(75g) in example 2 is replaced by PEG3000(150g) to obtain the washable terylene hydrophilic finishing agent 8, and the rest steps are consistent with example 2.
Example 9
The embodiment of the application discloses a washable polyester hydrophilic finishing agent, which comprises the following steps:
the preparation method of the application example refers to example 3, except that the PEG1500(75g) in example 3 is replaced by PEG3000(150g) to obtain the washable terylene hydrophilic finishing agent 9, and the rest steps are the same as example 3.
50ml of hydrophilic agent solution prepared respectively (2%, w/w) for the washable terylene hydrophilic finishing agents of the embodiments 1 to 9 is added with terylene cloth with the diameter of 15 multiplied by 5cm to be soaked for 10min, soaked for two times and rolled, the liquid carrying rate is about 80%, the terylene cloth is naturally dried, pre-dried at 105 ℃ for 30s and dried at 170 ℃ for 60s, and the corresponding finished terylene cloth is obtained and respectively marked as the embodiments 1 to 9. The control group was a polyester fabric finished without a hydrophilic finish.
And (3) performance testing:
hydrophilicity: in the present examples, the hydrophilicity of the polyester fabric finished without the hydrophilic finishing agent and the washability polyester fabric finished with the hydrophilic finishing agent of examples 1 to 9 was evaluated by measuring the wetting and diffusion time of the water droplets, and the disappearance time of the water droplets on the fabric was recorded with reference to AATCC (water absorption of bleached fabric) and the average value was measured 3 times.
Conductivity: the electrostatic half-lives of the terylene fabrics which are not finished by the hydrophilic finishing agent and are finished by the washable terylene hydrophilic finishing agent of the examples 1 to 9 are measured by referring to the GB/T12703-1991 (textile static test method) standard.
Washing fastness: referring to AATCC-61 standard, 46g of steel balls and 150ml of 1.5% detergent were put into each steel can, washed at 49 ℃ for 45min for one time, which corresponds to 5 home machine washes, and the washfastness of the terylene fabric without hydrophilic finishing agent and the terylene fabric after finishing with the hydrophilic finishing agent of the washable terylene of examples 1 to 9 was measured.
And (3) antibacterial property: after the terylene cloth finished by the washable terylene hydrophilic finishing agent of the embodiments 1 to 9 and the terylene cloth not finished by the hydrophilic finishing agent are placed in a humid environment for 20 days, the appearances of the terylene cloth are observed, and the results are shown in fig. 6 and fig. 7, wherein fig. 6 is a bacterial plaque graph of the terylene cloth finished by the washable terylene hydrophilic finishing agent 1 provided by the embodiments of the present application after being placed in a humid environment for 20 days; fig. 7 is a graph of bacterial plaque after 20 days of exposure to moisture, wherein the polyester fabric is not finished with a hydrophilic finishing agent according to the examples of the present application. As can be seen from fig. 6 and 7, the antibacterial property of the polyester fabric finished by the washable polyester hydrophilic finishing agent can be effectively improved.
TABLE 1 Performance results
Note: the data in the table are averaged 3 times.
The terylene cloth is not finished by a hydrophilic finishing agent, the wetting time of water drops is more than 23 mm, and the electrostatic half-life period is more than 10 min.
As can be seen from the results in table 1, the hydrophilic performance and the antistatic performance of the terylene fabrics treated by the washable terylene hydrophilic finishing agent of examples 1 to 9 are greatly improved. The terylene fabrics finished by the terylene hydrophilic finishing agents of the examples 1, 2 and 5 have better washing fastness, and still have better hydrophilic performance and antistatic performance after being washed for 30 times (equivalent to 150 times of household washing). The above examples illustrate that, in polyester fibers, a large number of aromatic ring structures are negatively charged underwater, and the cationic blocks of the wash-resistant polyester hydrophilic finishing agent of the present application can be adsorbed to the surface of the negatively charged polyester fabric through electrostatic attraction (cationic-pi interaction). After the further drying and baking treatment, the washable terylene hydrophilic finishing agent can be well attached to the surface of the terylene fiber. And because of the introduction of the cationic diol monomer structural component, the antistatic and antibacterial properties of the polyester fabric are also effectively improved. Therefore, after the washable terylene hydrophilic finishing agent is used for finishing the terylene fabric, the healthy and comfortable terylene fabric with good hydrophilicity, strong comfort, antistatic property, antibacterial property and good washability is obtained. Effectively solves the problem that the prior conventional polyester polyether hydrophilic finishing agent can not simultaneously improve the hydrophilicity and washability of the fabric after acting on the fabric.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. The washable terylene hydrophilic finishing agent is characterized in that the chemical structural formula is shown as a formula I;
the washable terylene hydrophilic finishing agent comprises an x unit, a y unit and a z unit which are sequentially and repeatedly connected; the number of the x units is a positive integer of 14-1000; the number of the y units is a positive integer of 1-75; the number of the z units is a positive integer of 1-30;
the R is1is-CH3(ii) a The R is2is-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0 to 18.
2. A method for preparing the hydrophilic finishing agent for wash-resistant polyester fiber according to claim 1, which comprises the following steps:
mixing dimethyl terephthalate, a diol monomer composition and an ester exchange catalyst for reaction to prepare a reactant;
and mixing the reactant, polyethylene glycol, an antioxidant and a polycondensation catalyst for reaction to prepare the washable terylene hydrophilic finishing agent.
3. The method of claim 2, wherein the diol monomer composition comprises a cationic diol monomer and ethylene glycol.
4. The method according to claim 3, wherein the cationic diol monomer has a structure represented by formula II or/and a structure represented by formula III;
the R is0Selected from-Cl, -Br or-OH; the R is1Is selected from-CH3(ii) a The R is2Is selected from-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0-18;
the R is1Is selected from-CH3(ii) a The R is2Is selected from-H, -CH2CH2OH, benzyl or- (CH)2)nCH3Wherein n is a natural number of 0 to 18.
5. The method of claim 3, wherein the cationic diol monomer is selected from the group consisting of 2, 2' - (methylimine) diethanol, and hydrochloride, bromate, and hydroxide salts thereof; bis (2-hydroxyethyl) dimethylammonium chloride or a hydroxide salt thereof; n-methyldiethanolamine and its hydrochloride, bromate and hydroxide salts; n-ethyldiethanolamine and its hydrochloride, bromate and hydroxide salts; triethanolamine and its hydrochloride, bromate and hydroxide salts; methyl bis (2-hydroxyethyl) benzylamine and its hydrochloride, bromate and hydroxide salts; methyl (dihydroxyethyl) stearylamine and one or more of its hydrochloride, bromate and hydroxide salts.
6. The method according to claim 3, wherein the molar ratio of the cationic diol monomer to the ethylene glycol is (0 to 40%): (60% to 100%).
7. The method according to claim 2, wherein the molar ratio of the dimethyl terephthalate to the diol monomer composition is 1 (2-3); the molar ratio of the polyethylene glycol to the dimethyl terephthalate is (0.1-1): 1.
8. The method according to claim 2, wherein the polyethylene glycol is one or more selected from the group consisting of polyethylene glycol having a number average molecular weight of 600, polyethylene glycol having a number average molecular weight of 1000, polyethylene glycol having a number average molecular weight of 1500, polyethylene glycol having a number average molecular weight of 2000, polyethylene glycol having a number average molecular weight of 3000, and polyethylene glycol having a number average molecular weight of 6000.
9. The method according to claim 2, wherein the transesterification catalyst is selected from one or more of zinc acetate, aluminum chloride, zinc chloride and titanium tetrachloride; the polycondensation catalyst is selected from one or more of antimony metal oxide, antimony alcoholate and antimony carboxylate; the antioxidant is selected from one or more of triphenyl phosphite, triphenyl phosphate, antioxidant HP-136 and antioxidant 1010.
10. The method according to claim 2, wherein the temperature of the mixing reaction of the dimethyl terephthalate, the diol monomer composition and the transesterification catalyst is 160 to 200 ℃ and the reaction time is 2 to 4 hours;
the temperature of the mixed reaction of the reactant, the polyethylene glycol, the antioxidant and the polycondensation catalyst is 200-250 ℃, and the reaction time is 3-6 hours.
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