zwitterionic resins and their manufacturing methods

Abstract

A zwitterionic resin is manufactured by a method comprising the following steps: A first thermal process is performed on a first crosslinking agent and a substance containing hydroxyl or aminocholine to form a first mixture, wherein the first crosslinking agent includes isocyanate groups. A second thermal process is performed on the first mixture, a second crosslinking agent, a chain extender, and an amino acid to form a zwitterionic resin, wherein the chain extender includes a polyol. The zwitterionic resin thereby possesses a complex network structure, which is beneficial for improving the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of functional fabrics made therefrom.

Description

Technical Field

[0001] This disclosure relates to a resin and a method for manufacturing the same, and more particularly to an amphoteric resin and a method for manufacturing the same. Background Technology

[0002] In today's busy society, people often lack the time and energy to wash stained clothes, sometimes even accumulating clothes for days without washing. This can cause stains to become embedded in the fibers, making them difficult to remove. Therefore, there is a need for clothing that combines stain removal, antibacterial properties, and deodorization to increase convenience. However, most textiles on the market with stain removal, antibacterial, and deodorization effects often fail to maintain their effectiveness consistently, and their stain-resistant and antibacterial functions gradually degrade with repeated wear, failing to meet users' needs. Therefore, how to improve and maintain the stain removal, antibacterial, and deodorization effects of textiles remains an important research topic for the textile industry. Summary of the Invention

[0003] This disclosure provides an amphoteric resin that can provide functional fabrics made therefrom with good moisture absorption and quick-drying properties, stain removal and antibacterial properties, deodorization properties, and wash fastness.

[0004] According to some embodiments disclosed herein, a method for manufacturing a zwitterionic resin includes the following steps: A first thermal process is performed on a first crosslinking agent and a substance containing hydroxyl or aminocholine to form a first mixture, wherein the first crosslinking agent includes isocyanate groups. A second thermal process is performed on the first mixture, a second crosslinking agent, a chain extender, and an amino acid to form a zwitterionic resin, wherein the chain extender includes a polyol.

[0005] In some embodiments disclosed herein, the first crosslinking agent comprises a structure as shown in formula (1). Wherein R1 includes the isocyanate group, and R2 includes the structure shown in formula (2).

[0006]

[0007] In some embodiments disclosed herein, the molecular structure of the first crosslinking agent is the same as that of the second crosslinking agent.

[0008] In some embodiments disclosed herein, the reaction temperature of the first thermal process is between 80°C and 110°C, and the reaction time of the first thermal process is between 5 minutes and 20 minutes.

[0009] In some embodiments disclosed herein, the reaction temperature of the second thermal process is between 130°C and 150°C, and the reaction time of the second thermal process is between 3 minutes and 5 minutes.

[0010] In some embodiments disclosed herein, the second thermal process includes the following steps: A second thermal process is performed on a first mixture, a second crosslinking agent, a chain extender, an amino acid, and an antifoaming agent to form an amphoteric resin, wherein the antifoaming agent includes polyamide, polyamide derivatives, or combinations thereof.

[0011] In some embodiments disclosed herein, the amino acids include tyrosine, glutamic acid, polyglutamic acid, aspartic acid, or combinations thereof.

[0012] According to some embodiments disclosed herein, an amphoteric resin is manufactured by a manufacturing method comprising the following steps: A first thermal process is performed on a first crosslinking agent and a hydroxyl or aminocholine-containing compound to form a first mixture, wherein the first crosslinking agent includes isocyanate groups. A second thermal process is performed on the first mixture, a second crosslinking agent, a chain extender, and an amino acid to form an amphoteric resin, wherein the chain extender includes a polyol.

[0013] In some embodiments disclosed herein, hydroxyl or aminocholine-containing compounds include structures as shown in formula (3) or formula (4).

[0014]

[0015] Where X - It is Cl - OH - Or tartaric acid.

[0016] In some embodiments disclosed herein, the polyol includes pentaerythritol.

[0017] In some embodiments disclosed herein, the amount of the first crosslinking agent used is between 27 parts by weight and 45 parts by weight, and the amount of the hydroxyl-containing or aminocholine-containing agent used is between 2 parts by weight and 10 parts by weight.

[0018] In some embodiments disclosed herein, the amount of chain extender used is between 3 parts by weight and 9 parts by weight, and the amount of amino acid used is between 4 parts by weight and 10 parts by weight.

[0019] In some embodiments disclosed herein, the amount of the second crosslinking agent used is between 3 parts by weight and 5 parts by weight.

[0020] In some embodiments disclosed herein, the method for manufacturing zwitterionic resin further includes the following steps: mixing a first mixture, a second crosslinking agent, a chain extender, and an amino acid to form a second mixture, wherein the viscosity of the second mixture is between 1.5 cP and 10 cP.

[0021] In some embodiments disclosed herein, the second thermal process includes the following steps: A second thermal process is performed on a first mixture, a second crosslinking agent, a chain extender, an amino acid, and an antifoaming agent to form an amphoteric resin, wherein the antifoaming agent includes polyamide, polyamide derivatives, or combinations thereof.

[0022] In some embodiments disclosed herein, the method for manufacturing zwitterionic resin further includes the following steps: mixing a first mixture, a second crosslinking agent, a chain extender, an amino acid, and an antifoaming agent to form a third mixture, wherein the viscosity of the third mixture is between 1.5 cP and 10 cP.

[0023] According to the embodiments disclosed above, the zwitterionic resin disclosed herein can be firmly deposited on a base fabric to form a functional fabric, thereby giving the functional fabric excellent moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness. Furthermore, the zwitterionic resin can be deposited on the base fabric through impregnation pressure absorption or inkjet coating, thus offering diverse applications. In the preparation process of the zwitterionic resin, the two-stage thermal process design ensures that the first crosslinking agent undergoes a segmented reaction, resulting in a more complex network structure in the subsequently formed zwitterionic resin, which is beneficial for improving the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of the functional fabric. Therefore, the functional fabric made with the zwitterionic resin can maintain its function well after multiple washes and can be widely used in the field of functional apparel textiles. Attached Figure Description

[0024] Figure 1 A flowchart illustrating a method for manufacturing a zwitterionic resin according to some embodiments of this disclosure is provided.

[0025] The symbols are explained as follows:

[0026] S10, S20: Steps. Detailed Implementation

[0027] The following describes several embodiments of this disclosure with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is, in some embodiments of this disclosure, these practical details are not essential and therefore should not be used to limit this disclosure.

[0028] In this article, the structure of polymers or groups is sometimes represented by a skeleton formula. This representation may omit carbon atoms, hydrogen atoms, and carbon-hydrogen bonds. Of course, if the structural formula explicitly shows atoms or atomic groups, the representation shown by the artist shall prevail.

[0029] This disclosure provides an amphoteric resin that can be firmly deposited on a base fabric to improve the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of functional fabrics made from it, effectively solving the problems of insufficient wash resistance and short service life of conventional functional fabrics. Furthermore, the amphoteric resin disclosed herein can be deposited on the base fabric by impregnation pressure adsorption or inkjet coating, thus possessing diverse applications.

[0030] Please see Figure 1 The diagram illustrates a flowchart of a method for manufacturing a zwitterionic resin according to some embodiments of the present disclosure. The method for manufacturing the zwitterionic resin includes steps S10 to S20. In step S10, a first thermal process is performed on a first crosslinking agent and a hydroxyl or aminocholine-containing compound to form a first mixture. In step S20, a second thermal process is performed on the first mixture, a second crosslinking agent, a chain extender, and an amino acid to form a zwitterionic resin. The above steps will be further explained in the following description.

[0031] First, a first crosslinking agent and a hydroxyl or aminocholine-containing compound are provided. In some embodiments, the first crosslinking agent may include an isocyanate trimer. Specifically, the first crosslinking agent may include a structure as shown in formula (1). R1 may include an isocyanate group, and R2 may include a blocked isocyanate group. For example, the first crosslinking agent may be derived from an aliphatic isocyanate, such as hexamethylene diisocyanate (HDI), xylylene diisocyanate (XDI), trimethyl hexamethylene diisocyanate (TMHDI), hydrogenated tolylene diisocyanate (HTDI), isophorone diisocyanate (IPDI), dicyclohexylmethane-4,4'-diisocyanate (HMDI) trimer, or a combination thereof. As another example, the first crosslinking agent may be derived from aromatic isocyanates, such as tolylene diisocyanate (TDI), diphenyl methane diisocyanate (MDI) trimers, or combinations thereof. In some embodiments, the blocked isocyanate group in the first crosslinking agent may be, for example, 3,5-dimethylpyrazole, i.e., the structure shown in formula (2). By including both isocyanate groups and blocked isocyanate groups in the first crosslinking agent, it is ensured that the first crosslinking agent reacts only partially during the subsequent first thermal process, thus retaining some reactivity for further reaction during the subsequent second thermal process. This results in a zwitterionic resin with a complex network structure, which is beneficial for improving the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of the resulting functional fabrics.

[0032] In some embodiments, hydroxyl or aminocholine may be, for example, an alcohol or amine having a zwitterionic group. In some embodiments, hydroxyl-containing choline may include a structure as shown in formula (3). In some embodiments, the aminocholine-containing component may include a structure as shown in formula (4). Where X - For example, counterions that keep hydroxyl or aminocholine-containing compounds neutral, such as Cl- - OH - Or tartrate. The zwitterionic groups present in hydroxyl or aminocholine can be retained in the subsequently formed zwitterionic resin, thereby providing the zwitterionic resin with good moisture absorption, quick drying, detergency, and antibacterial properties.

[0033] Next, step S10 is performed, in which the first crosslinking agent and the hydroxyl or aminocholine-containing compound undergo a first thermal process to form a first mixture. Specifically, the isocyanate groups in the first crosslinking agent can react with the hydroxyl or amino groups in the hydroxyl or aminocholine-containing compound to form the first mixture. In some embodiments, the reaction temperature of the first thermal process can be between 80°C and 110°C, and the reaction time of the first thermal process can be between 5 minutes and 20 minutes to ensure smooth reaction progress. In some embodiments, when the first crosslinking agent reacts with the hydroxyl choline-containing compound, the reaction temperature of the first thermal process can be between 90°C and 110°C, and when the first crosslinking agent reacts with the aminocholine-containing compound, the reaction temperature of the first thermal process can be between 80°C and 110°C. In some embodiments, the amount of the first crosslinking agent used can be between 27 parts by weight and 45 parts by weight, and the amount of the hydroxyl or aminocholine-containing compound used can be between 2 parts by weight and 10 parts by weight, thereby facilitating the reaction of each hydroxyl or aminocholine-containing compound with the isocyanate groups of the first crosslinking agent.

[0034] Subsequently, a second crosslinking agent, a chain extender, and an amino acid are provided. In some embodiments, the second crosslinking agent may comprise an isocyanate trimer. Specifically, the second crosslinking agent may comprise a structure as shown in formula (1) above, wherein R1 may comprise an isocyanate group, and R2 may comprise a blocked isocyanate group. For example, the second crosslinking agent may be derived from an aliphatic isocyanate, such as hexamethylene diisocyanate (HDI), phenyl diisocyanate (XDI), hydrogenated toluene diisocyanate (HTDI), isophorone diisocyanate (IPDI), dicyclohexylmethane-4,4'-diisocyanate (HMDI), trimethylhexamethylene diisocyanate (TMHDI) trimer, or a combination thereof. As another example, the second crosslinking agent may be derived from an aromatic isocyanate, such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) trimer, or a combination thereof. In some embodiments, the blocked isocyanate group in the second crosslinking agent may be, for example, 3,5-dimethylpyrazole, i.e., the structure shown in formula (2) above. In some embodiments, the molecular structure of the second crosslinking agent may be the same as that of the first crosslinking agent, making the reaction simpler and thereby improving the reactivity of each reagent during the second thermal process. In some embodiments, in the second crosslinking agent represented by formula (1) above, R1 and R2 may both include isocyanate groups (i.e., the second crosslinking agent may not have blocked isocyanate groups), thereby ensuring that the second crosslinking agent reacts completely during the subsequent second thermal process. The second crosslinking agent can increase the segment length and crosslinking degree of the zwitterionic resin in the subsequent second thermal process, thereby making the zwitterionic resin more firmly disposed on the base fabric, thereby improving the moisture absorption and quick-drying properties, deodorization, stain removal and antibacterial properties, and wash fastness of the functional fabric made therefrom.

[0035] Chain extenders include polyols. In some embodiments, the polyol may be, for example, ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, pentanediol, hexanediol, octanediol, triethylene glycol, tetraethylene glycol, glycerol, triethanolamine, triethanolamine ethane, xylitol, sorbitol, sucrose, pentaerythritol, or combinations thereof. In a preferred embodiment, the polyol may be, for example, pentaerythritol. Similar to the function of a second crosslinking agent, the chain extender can increase the segment length and crosslinking degree of the zwitterionic resin in a subsequent second thermal process, thereby making the zwitterionic resin more firmly disposed on the base fabric, thereby improving the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of the functional fabric made therefrom.

[0036] In some embodiments, the amino acid may be, for example, tyrosine, glutamic acid, polyglutamic acid, aspartic acid, or a combination thereof. The amino and / or carboxyl groups of the amino acid may be retained in the subsequently formed zwitterionic resin, thereby providing the zwitterionic resin with good deodorizing properties. In a preferred embodiment, the amino acid may be, for example, aspartic acid.

[0037] Next, the first mixture, the second crosslinking agent, the chain extender, and the amino acid are mixed to form the second mixture. In some embodiments, when the amount of the first crosslinking agent used is between 27 and 45 parts by weight, the amount of the second crosslinking agent used is between 3 and 5 parts by weight, the amount of the chain extender used is between 3 and 9 parts by weight, and the amount of the amino acid used is between 4 and 10 parts by weight, thereby increasing the degree of crosslinking between the components. In some embodiments, the second mixture can be applied to the surface of a base fabric by impregnation and pressure adsorption, thereby forming an amphoteric resin disposed on the base fabric during a subsequent second thermal process. In some embodiments, the viscosity of the second mixture can be between 1.5 cP and 10 cP, thereby facilitating the impregnation of the base fabric.

[0038] In some embodiments, 0.01 to 0.05 parts by weight of defoamer, 0.05 to 0.1 parts by weight of surfactant, and / or 40 to 350 parts by weight of water may be further added to the second mixture to form a third mixture. This third mixture is suitable for application to the surface of a base fabric by inkjet coating, thereby forming an amphoteric resin disposed on the base fabric during a subsequent second thermal process. In other words, the third mixture can also be considered as ink. The defoamer falling within the above proportions ensures that the third mixture is free of foam and helps to keep the viscosity and surface tension of the third mixture within a suitable range; while the surfactant falling within the above proportions provides good dynamic stability to the third mixture, facilitating spraying. In some embodiments, the defoamer may include polyether-modified polydimethylsiloxane, defoaming polysiloxane, a mixture of defoaming polysiloxane dissolved in polyethylene glycol and hydrophobic particles, polyamide, polyamide derivatives, or combinations thereof, and the surfactant may include polydimethylsiloxane, polyether-modified siloxane, polyether-modified polydimethylsiloxane, or combinations thereof. In some embodiments, the viscosity of the third mixture may be between 1.5 cP and 10 cP, such that the printed ink droplets have a suitable size and that the ink has suitable flowability to facilitate inkjet coating.

[0039] Subsequently, the second or third mixture is applied to the base fabric in a suitable manner. For the second mixture, the base fabric can be impregnated with the second mixture, allowing the second mixture to cover and penetrate the base fabric. More specifically, when the base fabric is impregnated with the second mixture, each component of the second mixture can adhere to and coat the surface of each fiber or yarn. In some embodiments, a dual-roller press can be used to press and suction the impregnated base fabric to remove excess second mixture from the surface of the base fabric. For the third mixture, the third mixture can be placed in an inkjet coating machine to apply the third mixture to the surface of the base fabric by inkjet coating. More specifically, when the third mixture is sprayed onto the surface of the base fabric, each component of the third mixture can adhere to all or part of the surface of each fiber or yarn. In some embodiments, the base fabric may include knitted fabric, woven fabric, and nonwoven fabric, etc. In some embodiments, the base material of the base fabric may be, for example, polyethylene terephthalate, thereby preventing the base fabric from chemically reacting with the components of the second or third mixture during subsequent thermal processing.

[0040] Next, step S20 is performed, in which the second mixture (including the first mixture, the second crosslinking agent, the chain extender, and amino acids) or the third mixture (including the first mixture, the second crosslinking agent, the chain extender, amino acids, and defoamer, surfactant, or water) disposed on the base fabric undergoes a second thermal process to form an amphoteric resin and a functional fabric. Specifically, during the second thermal process, the components of the second or third mixture adhering to the yarn surface can react with each other and crosslink to form an amphoteric resin, which is then firmly disposed on the base fabric to form the functional fabric. For example, during the second thermal process, the second crosslinking agent and the first crosslinking agent, which did not react during the first thermal process, can each undergo a crosslinking reaction. As another example, the chain extender and amino acids can also undergo a crosslinking reaction during the second thermal process. In some embodiments, the reaction temperature of the second thermal process can be between 130°C and 150°C, and the reaction time of the second thermal process can be between 3 minutes and 5 minutes, to meet the conditions of industry finishing processes.

[0041] In some embodiments, the base fabric of the functional fabric has at least two layers. Specifically, the spaces between the layers of the base fabric can be three-dimensional spaces naturally formed by yarns or fibers interlacing or stacking, and the yarns or fibers can be interlaced or wrapped around each other between the two layers of the base fabric. For example, when the base fabric of the functional fabric is a woven fabric, the spaces between the layers of the base fabric can be three-dimensional spaces formed by the weft yarns separating the warp yarns. As another example, when the base fabric of the functional fabric is a knitted fabric, the spaces between the layers of the base fabric can be three-dimensional spaces formed by yarns interlacing into loops. As yet another example, when the base fabric of the functional fabric is a nonwoven fabric, the spaces between the layers of the base fabric can be gaps created by the stacking of yarns (or fibers). In some embodiments, a zwitterion resin can be disposed between the two layers of the base fabric to securely adhere to the base fabric. For example, the zwitterion resin can be coated on each yarn or fiber of the base fabric to be disposed between the two layers of the base fabric.

[0042] After performing steps S10 to S20, a functional fabric is obtained, and the zwitterionic resin in the functional fabric is firmly deposited on the base fabric. Because the zwitterionic resin in the functional fabric has zwitterionic groups derived from hydroxyl or aminocholine, it exhibits good moisture absorption for rapid drying and good stain removal and antibacterial properties. Furthermore, because the zwitterionic resin in the functional fabric has amino and / or carboxyl groups derived from amino acids, it exhibits good deodorization properties. In addition, the zwitterionic resin formed by the two-stage thermal process can form a complex network structure on the fibers or yarns of the base fabric, allowing the zwitterionic resin to be more firmly deposited on the base fabric. This ensures that the functional fabric has good moisture absorption and quick-drying properties, stain removal and antibacterial properties, deodorization properties, and wash fastness.

[0043] It should be noted that this disclosure ensures that the first crosslinking agent and its derivatives produced during the thermal process undergo a "segmented reaction" by designing the molecules of the first crosslinking agent and setting the reaction temperatures of the first and second thermal processes. Specifically, since the first crosslinking agent of this disclosure reacts only partially at temperatures between 80°C and 110°C, but completely at temperatures between 130°C and 150°C, by setting the reaction temperatures of the first and second thermal processes within these ranges, it is ensured that a portion of the first crosslinking agent is retained until the second thermal process begins its crosslinking reaction. This results in a complex network structure in the subsequently formed diionomer resin, which is beneficial for improving the moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness of functional fabrics. On the other hand, by designing the molecules of the second crosslinking agent and setting the reaction temperature of the second thermal process, it is also ensured that the second crosslinking agent reacts completely during the second thermal process, thus facilitating the crosslinking reaction.

[0044] The features and effects of this disclosure will be described in more detail below with reference to various embodiments and comparative examples. It should be understood that the materials used, their quantities and proportions, processing details, and processing procedures can be appropriately changed without departing from the scope of this disclosure. Therefore, this disclosure should not be interpreted as limiting based on the embodiments described below. The components and contents used to form the zwitterionic resin in each embodiment and comparative example are shown in Table 1, wherein the base fabric in each embodiment and comparative example is PET knitted fabric. Each embodiment is prepared via steps S10 to S20 described above, wherein the reaction temperature of the first thermal process is 100°C, and the reaction temperature of the second thermal process is 130°C.

[0045] Table 1

[0046]

[0047]

[0048] Note 1: The content in parentheses is the amount, and the unit is parts by weight.

[0049] Note 2: The water-based crosslinking agent was purchased from the Textile Industry Research Institute.

[0050] Note 3: Pentaerythritol was purchased from Aldrich.

[0051] Note 4: In Example 7, 0.02 parts by weight of defoamer and 120 parts by weight of water were added, wherein the defoamer was a polyamide derivative.

[0052] Note 5: The zwitterionic resins in Comparative Examples 2-3 and Examples 1-6 were applied to the base fabric by impregnation and pressure adsorption, while the zwitterionic resin in Example 7 was applied to the base fabric by inkjet coating.

[0053] <Experiment Example 1: Fabric Moisture Absorption and Quick-Drying Test and Stain Removal Properties>

[0054] In this experimental example, the FTTS-FA-004 standard method was used to conduct moisture absorption and quick-drying tests on each embodiment and comparative example, and the AATCC 130 standard method was used to conduct stain removal tests on each embodiment and comparative example. Example 7 underwent 50 washes, and was tested again after the 50 washes. The test results are shown in Table 2.

[0055] Table 2

[0056]

[0057] As shown in Table 2, before washing, all examples demonstrated good performance in both moisture absorption and quick-drying ability, as well as stain removal capability, making them suitable for various products requiring both moisture absorption and quick-drying properties (e.g., sportswear). Furthermore, as shown in Comparative Examples 2-3, since the zwitterionic resins used to form Comparative Examples 2-3 contain hydroxyl or aminocholine components, Comparative Examples 2-3 still provide good moisture absorption and quick-drying properties and stain removal capabilities compared to Comparative Example 1. Additionally, Example 7, after 50 washes, still exhibited better moisture absorption and quick-drying properties and stain removal capabilities than Comparative Example 1 before washing, demonstrating excellent wash fastness and successfully overcoming the problem of poor wash fastness caused by the use of conventional processing aids. It is worth noting that, since inkjet coating is less effective at firmly attaching zwitterionic resin to the base fabric compared to impregnation and pressure absorption, it is reasonable to infer from the test results of Example 7 that Comparative Examples 2-3 and Examples 1-6 also have good moisture absorption, quick drying and stain removal properties after 50 washes.

[0058] <Experiment Example 2: Fabric Drying Rate Test>

[0059] In this experimental example, under an ambient temperature of 20℃ and a relative humidity of 65%, an area of ​​5×5cm was... 2 The fabric sample was placed on a microbalance (balance plate temperature 20-22℃), and the dry weight of the fabric was recorded via computer connection. 0.1g of water was dripped from the center of the fabric sample using a precision dropper, with the dropper tip 1cm above the sample. The wet weight of the fabric was then recorded. The experiment was set to last 40 minutes, and the weight change of the fabric was recorded every 5 minutes to calculate the residual moisture rate. The test results are shown in Table 3.

[0060] Table 3

[0061]

[0062] As shown in Table 3, compared with Comparative Example 1, Comparative Examples 2-3 and each embodiment had significantly lower residual moisture after the same drying time, indicating that hydroxyl or aminocholine-containing compounds can provide good moisture absorption and drying effects.

[0063] <Experiment Example 3: Antibacterial Test of Fabrics>

[0064] In this experimental example, the ATCC 6538 Staphylococcus aureus inhibition test was performed on each embodiment and comparative example using the AATCC 100 standard method. Example 7 underwent 50 water washes, and the test was performed again after each 50 washes. The test results are shown in Table 4.

[0065] Table 4

[0066]

[0067] As shown in Table 4, all examples have a sterilization rate greater than 99.7%, and Example 7 still has a sterilization rate greater than 99.9% after 50 washes, demonstrating good antibacterial effect and wash fastness. On the other hand, since the components used to form the zwitterionic resins of Comparative Examples 2-3 include hydroxyl or aminocholine-containing components, Comparative Examples 2-3 still provide good antibacterial effect compared to Comparative Example 1.

[0068] <Experiment Example 4: Odor Deodorization Test of Fabrics>

[0069] In this experimental example, the deodorization rates of the fabrics to ammonia and acetic acid were tested using the FTTS-FA-018 standard method for each embodiment and comparative example. Example 7 underwent 20 washes, and the test was performed again after the 20 washes. The test results are shown in Table 5.

[0070] Table 5

[0071]

[0072] As shown in Table 5, each embodiment exhibits a certain degree of deodorization for both ammonia and acetic acid. Furthermore, as can be seen from Examples 6 and 7, when aspartic acid is used as the amino acid disclosed herein, the resulting zwitterionic resin provides better deodorization properties for functional fabrics and retains good deodorization even after 20 washes.

[0073] According to the embodiments disclosed above, the functional fabric of this invention includes a base fabric and a zwitterionic resin, with the zwitterionic resin firmly disposed on the base fabric, thereby improving the functional fabric's moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness. Furthermore, the zwitterionic resin can be disposed on the base fabric by impregnation pressure absorption or inkjet coating, thus offering diverse applications. During the preparation of the zwitterionic resin, by designing the molecular structure of the first crosslinking agent and controlling the reaction temperatures of the two-stage thermal processes, it is ensured that the first crosslinking agent undergoes a segmented reaction, resulting in a more complex network structure in the subsequently formed zwitterionic resin, which is beneficial for improving the functional fabric's moisture absorption and quick-drying properties, deodorizing properties, stain removal and antibacterial properties, and wash fastness. As a result, the functional fabric of this invention can maintain its function well after multiple washes and can be widely used in the field of functional apparel textiles.

[0074] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A method for producing a zwitterionic resin, characterized by, comprising: subjecting a first crosslinking agent and a hydroxyl- or amino-containing choline to a first thermal process to form a first mixture, the first crosslinking agent comprising isocyanate groups; and subjecting the first mixture, a second crosslinking agent, a chain extender, and an amino acid to a second thermal process to form the zwitterionic resin, the chain extender comprising a polyol, the amino acid being aspartic acid, wherein the first crosslinking agent and the second crosslinking agent comprise a structure as shown in Formula (1), and the hydroxyl- or amino-containing choline comprises a structure as shown in Formula (3) or Formula (4), wherein R1comprises the isocyanate group, and R2comprises a structure as shown in formula (2), wherein X - is Cl - , OH - or tartrate.

2. The method of claim 1, wherein the first crosslinking agent has a molecular structure that is the same as a molecular structure of the second crosslinking agent.

3. The method of claim 1, wherein the first thermal process has a reaction temperature between 80 °C and 110 °C, and a reaction time between 5 minutes and 20 minutes.

4. The method of claim 1, wherein the second thermal process has a reaction temperature between 130 °C and 150 °C, and a reaction time between 3 minutes and 5 minutes.

5. The method of claim 1, wherein subjecting the second thermal process comprises: subjecting the first mixture, the second crosslinking agent, the chain extender, the amino acid, and an antifoaming agent to the second thermal process to form the zwitterionic resin, wherein the antifoaming agent comprises a polyamide, a polyamide derivative, or a combination thereof.

6. A zwitterionic resin characterized in that, manufactured by a method comprising: subjecting a first crosslinking agent and a hydroxyl- or amino-containing choline to a first thermal process to form a first mixture, the first crosslinking agent comprising isocyanate groups; and subjecting the first mixture, a second crosslinking agent, a chain extender, and an amino acid to a second thermal process to form the zwitterionic resin, the chain extender comprising a polyol, the amino acid being aspartic acid, wherein the first crosslinking agent and the second crosslinking agent comprise a structure as shown in Formula (1), and the hydroxyl- or amino-containing choline comprises a structure as shown in Formula (3) or Formula (4), wherein R1comprises the isocyanate group, and R2comprises a structure as shown in formula (2), wherein X - is CI - , OH - or tartrate.

7. The zwitterionic resin of claim 6, wherein the polyol comprises pentaerythritol.

8. The zwitterionic resin of claim 6, wherein the first crosslinking agent is used in an amount between 27 parts by weight and 45 parts by weight, and the hydroxyl- or amino-containing choline is used in an amount between 2 parts by weight and 10 parts by weight.

9. The zwitterionic resin of claim 8, wherein the chain extender is used in an amount between 3 parts by weight and 9 parts by weight, and the amino acid is used in an amount between 4 parts by weight and 10 parts by weight.

10. The zwitterionic resin of claim 8, wherein the second crosslinking agent is used in an amount between 3 parts by weight and 5 parts by weight.

11. The zwitterionic resin of claim 6, wherein the method further comprises: mixing the first mixture, the second crosslinking agent, the chain extender, and the amino acid to form a second mixture, wherein the second mixture has a viscosity of between 1.5 cP and 10 cP.

12. The zwitterionic resin of claim 6, wherein performing the second thermal process comprises: performing the second thermal process on the first mixture, the second crosslinking agent, the chain extender, the amino acid, and a defoaming agent to form the zwitterionic resin, wherein the defoaming agent comprises a polyamide, a polyamide derivative, or a combination thereof.

13. The zwitterionic resin of claim 12, wherein the method of manufacturing further comprises: mixing the first mixture, the second crosslinking agent, the chain extender, the amino acid, and the defoaming agent to form a third mixture, wherein the third mixture has a viscosity of between 1.5 cP and 10 cP.

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