Washable stable humidity-sensitive printing paste composition, humidity-sensitive printing paste as well as preparation method and application of humidity-sensitive printing paste

Abstract

The invention provides a washable stable humidity-sensitive printing paste composition, a humidity-sensitive printing paste and a preparation method and application thereof. The washing-resistant stable humidity-sensitive printing paste composition comprises humidity-sensitive resin, an interface anchoring agent, a rheology modifier, a latent cross-linking agent and water, the humidity-sensitive resin contains amino and / or hydroxyl, and the latent cross-linking agent is selected from oxime-terminated alicyclic polyisocyanates or derivatives thereof. The latent cross-linking agent has chemical inertness at room temperature and can ensure the rheological stability of the slurry in the printing process, in the baking process, an end-capping reagent in the latent cross-linking agent is dissociated, an isocyanate group and amino and / or hydroxyl in the humidity-sensitive resin are subjected to a cross-linking reaction to form a semi-interpenetrating network structure, and the structure allows water molecules to enter and exit, so that the moisture-sensitive printing ink is formed. The fabric has the humidity-sensitive response characteristic, excessive swelling and movement of hydrophilic chain segments can be limited, dissociation or falling of humidity-sensitive resin under the action of washing shearing force is prevented, and the humidity-sensitive characteristic and washing-resistant stability are improved.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a water-resistant and wash-stable wet-sensitive printing paste composition, a wet-sensitive printing paste, its preparation method and application. Background Technology

[0002] Intelligent temperature and humidity regulating textiles are textile materials that can automatically adjust their thermal and humidity properties according to changes in the external environment (such as temperature and humidity). Moisture-sensitive printing paste is the key medium for achieving temperature and humidity regulation. It applies moisture-sensitive polymer materials to the fabric surface in a specific pattern matrix. The basic principle is to utilize the hydrophilic / hydrophobic switching or volume swelling effect after the paste forms a film, driving the opening and closing of the fabric pores, thereby achieving intelligent regulation of "dry-state heat preservation and wet-state breathability".

[0003] Compared to full-coverage technology, printing technology has advantages such as high flexibility and environmental friendliness. In recent years, with the increasing demand from consumers for high-performance sports equipment and outdoor clothing, developing wet-sensitive printing pastes with high wash fastness, excellent rheological properties, and suitability for continuous industrial production has become a technical challenge that the textile printing and dyeing industry urgently needs to overcome.

[0004] In related technologies, the preparation of moisture-sensitive textiles mainly includes the following methods: (1) Lamination composite hydrophilic film method: This method involves bonding and laminating a pre-prepared non-porous hydrophilic polyurethane film or microporous film onto the fabric using hot melt adhesive. The finished product obtained by this method has excellent waterproof properties, but the film structure is dense and covers the entire surface of the fabric, making it impossible to achieve dynamic opening and closing of physical pores. It can only rely on the diffusion of water molecules to achieve the moisture permeability effect, which is less efficient. Moreover, the lamination process equipment is expensive, the process flexibility is poor, the production cost is high, and the fabric obtained has a stiff feel. (2) Moisture-sensitive coating finishing method: This method uses water-based polyurethane or polyacrylate moisture-sensitive emulsion as moisture-sensitive material, and treats the fabric by scraping or padding to give the fabric moisture-sensitive properties. However, moisture-sensitive materials are rich in a large number of hydrophilic groups, and are very easy to over-swell, soften, or even dissolve and fall off during the washing process. Usually, after 5-10 washes, the moisture-sensitive effect is greatly reduced. Summary of the Invention

[0005] This application provides a water-resistant and washable wet-sensitive printing paste composition, a wet-sensitive printing paste, its preparation method, and its application, in order to solve the above-mentioned technical problems.

[0006] In related technologies, some methods for preparing moisture-sensitive textiles involve treating the fabric with cross-linked printing pastes to impart moisture-sensitive properties. This method involves adding cross-linking agents such as aziridine and common isocyanates to the paste to form a cross-linked printing paste. These cross-linking agents can form a cross-linked network, which can enhance the response stability of the moisture-sensitive material by restricting molecular movement. However, the inventors, after analyzing this technology, discovered that these cross-linking agents can react with moisture-sensitive resins at room temperature, causing a sharp increase in viscosity (commonly known as "dead paste") within hours of paste preparation. This makes it impossible to meet the continuous production requirements of rotary screen printing machines and easily leads to rheological problems such as screen clogging and unclear printing edge bleeding.

[0007] To achieve the above objectives, the technical solution of this application is as follows: This application provides a wash-resistant, stable, wet-sensitive printing paste composition, comprising a wet-sensitive resin, an interface anchoring agent, a rheology modifier, a latent crosslinking agent, and water. The wet-sensitive resin contains amino and / or hydroxyl groups, and the latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives. Preferably, the latent crosslinking agent is selected from methyl ethyl ketone oxime-terminated isophorone diisocyanate trimers (i.e., methyl ethyl ketone oxime (MEKO)-terminated IPDI trimers).

[0008] In one embodiment of this application, the moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane, and amino-terminated polyurethane.

[0009] In one embodiment of this application, the interface anchoring agent is selected from at least one of γ-glycidoxypropyltrimethoxysilane (KH-560), γ-aminopropyltriethoxysilane (KH-550), γ-methacryloyloxypropyltrimethoxysilane (KH-570), and 3-mercaptopropyltriethoxysilane (KH-580).

[0010] In one embodiment of this application, the rheology modifier is selected from associative polyurethane thickeners.

[0011] In one embodiment of this application, the mass ratio of the moisture-sensitive resin, the interface anchoring agent, the rheology modifier, the latent crosslinking agent, and water is 60-80:0.5-1:1.5-2:1-5:16-28, preferably 65-80:0.5-0.8:1.8-2:1.5-5:16.2-27.2.

[0012] This application also provides a method for preparing a water-resistant and wash-stable wet-sensitive printing paste, comprising the following steps: S1. Mix the moisture-sensitive resin, interface anchoring agent and water, stir to obtain a base slurry, wherein the moisture-sensitive resin contains amino and / or hydroxyl groups; S2. Under stirring, add rheology modifier dropwise to the base paste until the paste becomes a milky white paste. Then add latent crosslinking agent and water, stir, add defoamer, filter, and obtain the water-resistant and stable wet-sensitive printing paste. The latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives.

[0013] In one embodiment of this application, in step S1, the stirring is performed at a speed of 1000-1500 rpm, preferably at a speed of 1200-1500 rpm.

[0014] In one embodiment of this application, in step S1, the stirring time is 10-15 minutes, preferably 12-15 minutes.

[0015] This application also provides a water-resistant, wash-stable, moisture-sensitive printing paste prepared according to the preparation method described above.

[0016] This application also provides the application of the water-resistant, wash-stable, moisture-sensitive printing paste as described above in textiles.

[0017] The beneficial effects of this application are: In this application, the latent crosslinking agent (selected from oxime-terminated alicyclic polyisocyanates or their derivatives) is chemically inert at room temperature, ensuring the rheological stability of the paste during the printing process. During baking, the end-capping agent in the latent crosslinking agent dissociates and releases isocyanate groups. The isocyanate groups react with the amino and / or hydroxyl groups in the moisture-sensitive resin (or the surface-active groups of the fiber; if the fiber contains functional groups that can undergo crosslinking reactions with isocyanate groups, then the functional groups undergo crosslinking reactions with the isocyanate groups) to form a semi-interpenetrating network structure. This semi-interpenetrating network structure allows water molecules to enter and exit, giving the fabric moisture-sensitive response characteristics. Furthermore, this semi-interpenetrating network structure can also limit the excessive swelling and movement of hydrophilic segments, preventing the moisture-sensitive resin from dissociating or falling off under the shear force of water washing, thereby improving the moisture-sensitive properties and water-washing stability of the fabric.

[0018] This application uses an associative polyurethane thickener as a rheology modifier. The hydrophobic association of the associative polyurethane thickener can impart excellent thixotropic properties to the paste, making the printing outline clear. Furthermore, the associative polyurethane thickener has excellent compatibility with the moisture-sensitive resin (the moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane, and amino-terminated polyurethane). After the moisture-sensitive resin forms a film, it will not undergo phase separation or form a dense barrier layer. It can retain the original air and moisture permeability channels of the base film to the maximum extent, ensuring the integrity of the moisture-sensitive response function, thereby improving the moisture-sensitive response speed of the fabric. Detailed Implementation

[0019] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, in this application, the term "part" refers to parts by mass.

[0020] One embodiment of this application provides a water-resistant and stable wet-sensitive printing paste composition, comprising a wet-sensitive resin, an interface anchoring agent, a rheology modifier, a latent crosslinking agent, and water. The wet-sensitive resin contains amino and / or hydroxyl groups, and the latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives. Preferably, the latent crosslinking agent is selected from methyl ethyl ketone oxime-terminated isophorone diisocyanate trimers (i.e., methyl ethyl ketone oxime (MEKO)-terminated IPDI trimers).

[0021] In this application, the latent crosslinking agent (selected from oxime-terminated alicyclic polyisocyanates or their derivatives) is chemically inert at room temperature, ensuring the rheological stability of the paste during the printing process. During baking, the end-capping agent in the latent crosslinking agent dissociates and releases isocyanate groups. The isocyanate groups react with the amino and / or hydroxyl groups in the moisture-sensitive resin (or the surface-active groups of the fiber; if the fiber contains functional groups that can undergo crosslinking reactions with isocyanate groups, then the functional groups undergo crosslinking reactions with the isocyanate groups) to form a semi-interpenetrating network structure. This semi-interpenetrating network structure allows water molecules to enter and exit, giving the fabric moisture-sensitive response characteristics. Furthermore, this semi-interpenetrating network structure can also limit the excessive swelling and movement of hydrophilic segments, preventing the moisture-sensitive resin from dissociating or falling off under the shear force of water washing, thereby improving the moisture-sensitive properties and water-washing stability of the fabric.

[0022] In one embodiment of this application, the moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane, and amino-terminated polyurethane.

[0023] In one embodiment of this application, the interface anchoring agent is selected from at least one of γ-glycidoxypropyltrimethoxysilane (KH-560), γ-aminopropyltriethoxysilane (KH-550), γ-methacryloyloxypropyltrimethoxysilane (KH-570), and 3-mercaptopropyltriethoxysilane (KH-580).

[0024] In one embodiment of this application, the rheology modifier is selected from associative polyurethane thickeners.

[0025] This application uses an associative polyurethane thickener as a rheology modifier. The hydrophobic association of the associative polyurethane thickener can impart excellent thixotropic properties to the paste, making the printing outline clear. Furthermore, the associative polyurethane thickener has excellent compatibility with the moisture-sensitive resin (the moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane, and amino-terminated polyurethane). After the moisture-sensitive resin forms a film, it will not undergo phase separation or form a dense barrier layer. It can retain the original air and moisture permeability channels of the base film to the maximum extent, ensuring the integrity of the moisture-sensitive response function, thereby improving the moisture-sensitive response speed of the fabric.

[0026] In one embodiment of this application, the mass ratio of moisture-sensitive resin, interface anchoring agent, rheology modifier, latent crosslinking agent and water is 60-80:0.5-1:1.5-2:1-5:16-28, preferably 65-80:0.5-0.8:1.8-2:1.5-5:16.2-27.2.

[0027] Another embodiment of this application provides a method for preparing a water-resistant and wash-stable wet-sensitive printing paste, comprising the following steps: S1. Mix the moisture-sensitive resin, interface anchoring agent and water, stir to obtain the base slurry, wherein the moisture-sensitive resin contains amino and / or hydroxyl groups; S2. Add rheology modifier dropwise to the base paste while stirring until the paste becomes a milky white paste. Then add latent crosslinking agent and water, stir, add defoamer, filter, and obtain a water-resistant and stable wet-sensitive printing paste. The latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives.

[0028] In one embodiment of this application, in step S1, stirring is performed at a speed of 1000-1500 rpm, preferably at a speed of 1200-1500 rpm. The stirring time is 10-15 minutes, preferably 12-15 minutes.

[0029] In one embodiment of this application, in step S1, the amount of water used accounts for 70% of the total amount of water.

[0030] In one embodiment of this application, in step S2, the stirring speed is 300-500 rpm, preferably 350-500 rpm.

[0031] In one embodiment of this application, during step S2, the viscosity of the slurry is observed during the addition of the rheology modifier until the slurry becomes a milky white paste, at which point the rheology modifier is no longer added. At this point, the slurry exhibits obvious thixotropy (i.e., it does not flow when still and becomes thinner when stirred).

[0032] In one embodiment of this application, in step S2, the mass ratio of defoamer to latent crosslinking agent is 0.2-1:1-5, preferably 0.3-0.8:1.5-3. The defoamer includes, but is not limited to, substances such as polydimethylsiloxane, polyoxyethylene glycerol, polyoxypropylene glycerol, butyl phosphate, isobutyl phosphate, n-octanol, and silicone.

[0033] In one embodiment of this application, in step S2, the material is filtered through an 80-100 mesh filter.

[0034] Another embodiment of this application provides a water-resistant, wash-stable, moisture-sensitive printing paste prepared according to the preparation method described above.

[0035] Another embodiment of this application also provides the application of the water-resistant, wash-stable, moisture-sensitive printing paste as described above in textiles.

[0036] The method of using the water-wash-resistant and moisture-sensitive printing paste of this application is as follows: A wash-resistant, moisture-sensitive printing paste is injected into the printing system, printed on the fabric to be printed, pre-baked, and then baked. The fabric to be printed can be polyester fiber fabric (i.e., polyester fabric), polyamide fabric (i.e., nylon fabric), etc. The pre-baking temperature is 80-100℃, preferably 85-100℃; the pre-baking time is 1-2 minutes, preferably 1.5-2 minutes. The baking temperature is 155-165℃, preferably 158-163℃; the baking time is 130-170 seconds, preferably 140-160 seconds.

[0037] It should be understood that the technical solutions of the various embodiments in this application can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] Example 1 S1. Add 70 parts of nonionic waterborne polyurethane emulsion (solid content 40%, model Bayhydrol® U 2757) containing polyethylene glycol-1000 (PEG-1000) segments in the side chain to the stirred tank, turn on the high-speed disperser, set the speed to 1500 rpm, slowly add 0.5 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH-560) and 17.15 parts of water, stir at 1500 rpm for 10 min to obtain the basic slurry; S2. Adjust the rotation speed to 300 rpm, and add the associative polyurethane thickener (HEUR, model RM-2020) dropwise to the base slurry at this speed. Observe the viscosity change of the slurry during the dropwise addition of the associative polyurethane thickener until the slurry becomes a milky white paste with obvious thixotropy. At this point, stop adding the associative polyurethane thickener. The total amount of associative polyurethane thickener used is 2 parts. Subsequently, 3 parts of methyl ethyl ketone oxime (MEKO)-terminated IPDI trimer (commercially available, model (Evonik) VESTANAT® B 1358 A) and 7.35 parts of water were added to the slurry at 300 rpm and stirred at 300 rpm for 20 min. Then, add 0.3 parts of polydimethylsiloxane defoamer (commercially available, model BYK-024), filter through a 100-mesh sieve, and obtain the printing paste.

[0039] Example 2 S1. Add 65 parts of nonionic waterborne polyurethane emulsion (solid content 40%, model Bayhydrol® U 2757) containing polyethylene glycol-1000 (PEG-1000) segments in the side chain to the stirred tank, turn on the high-speed disperser, set the speed to 1000 rpm, slowly add 0.8 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH-560) and 19.04 parts of water, stir at 1000 rpm for 15 min to obtain the basic slurry; S2. Adjust the rotation speed to 500 rpm, and add the associative polyurethane thickener (HEUR, model RM-2020) dropwise to the base slurry at this speed. Observe the viscosity change of the slurry during the dropwise addition of the associative polyurethane thickener until the slurry becomes a milky white paste with obvious thixotropy. At this point, stop adding the associative polyurethane thickener. The total amount of associative polyurethane thickener used is 2 parts. Subsequently, 5 parts of methyl ethyl ketone oxime (MEKO)-terminated IPDI trimer (commercially available, model (Evonik) VESTANAT® B 1358 A) and 8.16 parts of water were added to the slurry at 500 rpm and stirred at 500 rpm for 15 min. Then, add 0.1 parts of polydimethylsiloxane defoamer (commercially available, model BYK-024), filter through an 80-mesh sieve, and obtain the printing paste.

[0040] Example 3 S1. Add 80 parts of nonionic waterborne polyurethane emulsion (solid content 40%, model Bayhydrol® U 2757) containing polyethylene glycol-1000 (PEG-1000) segments in the side chain to the stirred tank. Turn on the high-speed disperser and set the speed to 1200 rpm. Slowly add 0.5 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH-560) and 11.34 parts of water. Stir at 1200 rpm for 12 min to obtain the basic slurry. S2. Adjust the rotation speed to 400 rpm, and add the associative polyurethane thickener (HEUR, model RM-2020) dropwise to the base slurry at this speed. Observe the viscosity change of the slurry during the dropwise addition of the associative polyurethane thickener until the slurry becomes a milky white paste with obvious thixotropy. At this point, stop adding the associative polyurethane thickener. The total amount of associative polyurethane thickener used is 1.8 parts. Subsequently, 1.5 parts of methyl ethyl ketone oxime (MEKO)-terminated IPDI trimer (commercially available, model (Evonik) VESTANAT® B 1358 A) and 4.86 parts of water were added to the slurry at 400 rpm and stirred at 400 rpm for 18 min. Then, add 0.2 parts of polydimethylsiloxane defoamer (commercially available, model BYK-024), filter through a 90-mesh sieve, and obtain the printing paste.

[0041] Comparative Example 1 The difference between this comparative example and Example 1 is that the IPDI trimer was not capped with methyl ethyl ketone oxime (MEKO).

[0042] Comparative Example 2 The difference between this comparative example and Example 1 is that an aziridine crosslinking agent (commercially available, model SAC-100) is used instead of the methyl ethyl ketone oxime (MEKO)-terminated IPDI trimer.

[0043] Comparative Example 3 The difference between this comparative example and Example 1 is that a non-associative ASE alkali-swellable thickener (commercially available, model ASE-60) is used instead of an associative polyurethane thickener.

[0044] Performance testing The pot life of the printing pastes prepared in Examples 1-3 and Comparative Examples 1-3 was tested. The specific steps were as follows: the viscosity (i.e., initial viscosity) of each sample was tested using a viscometer. Then, each sample was placed at 25°C. During this process, the viscosity was monitored using a viscometer. The time interval between the time point corresponding to the viscosity doubling (i.e., the viscosity increasing to twice the initial value) and the time point corresponding to the initial viscosity was recorded. This time interval is the pot life. The results are shown in Table 1. The printing pastes prepared in Examples 1-3 and Comparative Examples 1-3 were printed onto the fabric. The specific steps were as follows: the printing paste was injected into the rotary screen printing system and printed on the polyester fabric. It was pre-baked at 90°C for 1.5 minutes and then baked at 160°C for 150 seconds to obtain the printed fabric. The clarity of the printed edges of each printed fabric was visually inspected, and the results are shown in Table 1. The moisture response time of each printed fabric was tested using the following steps: the printed fabric was placed under constant environmental conditions, and its initial shape was recorded in a dry state; subsequently, the moisture response time of the printed area (1 cm²) was measured. 2 Apply water at a rate of 0.1 mL and continuously observe the changes in the pores or morphology of the fabric corresponding to the printed area. Record the time required from the moment the water comes into contact with the printed area until the printed area shows a significant morphological response and tends to stabilize. This time is defined as the moisture-sensitive response duration. The results are shown in Table 1. The wash fastness of the prints on each printed fabric was tested. The specific steps were as follows: each printed fabric was washed 20 times according to the household washing conditions specified in AATCC 135. The appearance of each printed fabric was then observed and rated. The evaluation criteria were: Grade 5 – the printed layer was intact, with no bubbling, no peeling, and no obvious swelling; Grade 4 – the printed layer swelled slightly or the edges changed slightly, but the overall structure remained intact; Grade 3 – the printed layer showed obvious swelling, wrinkling, or localized peeling; Grade 2 – the printed layer peeled off over a large area or was severely damaged; Grade 1 – the printed layer was almost completely peeled off, and its function was lost. The results are shown in Table 1. The moisture permeability of each printed fabric before and after washing was tested according to GB / T 12704-91, "Determination of Moisture Permeability of Fabrics – Moisture Permeability Cup Method". The change rate of moisture permeability was calculated using the formula: Moisture permeability change rate = (Moisture permeability before washing - Moisture permeability after washing) / Moisture permeability before washing * 100%. The results are shown in Table 1.

[0045] Table 1 Test Results

[0046] Note: The printing paste in Comparative Example 2 became viscous rapidly during the printing process, causing screen clogging and making it impossible to complete the printing continuously.

[0047] As shown in Table 1, the printed fabric of Example 1 maintained its appearance intact after washing, and its moisture permeability did not change significantly before and after washing. In contrast, the printed fabric of Comparative Example 1 suffered severe print loss after washing, and its moisture-sensitive properties were lost. This result indicates that simple physical adsorption cannot effectively resist the shear force of washing, and the resulting printed fabric exhibits poor water-washing stability in terms of moisture sensitivity.

[0048] As shown in Table 1, the viscosity of the printing paste in Example 1 did not change significantly after 15 days, while the printing paste in Comparative Example 2 gelled after 4 hours, making it unusable for production.

[0049] As shown in Table 1, the printed fabric of Comparative Example 3 exhibited blurred printing edges, while the printed fabric of Example 1 showed clear and sharp printing. Furthermore, compared to Comparative Example 3, the moisture-sensitive response time of the printed fabric of Example 1 was significantly shortened. These results indicate that this application, using an associative polyurethane thickener as a rheology modifier, can utilize the hydrophobic association effect of the associative polyurethane thickener to impart excellent thixotropic properties to the paste, resulting in clear printing outlines. Moreover, the associative polyurethane thickener exhibits excellent compatibility with the moisture-sensitive resin (the moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane, and amino-terminated polyurethane). After the moisture-sensitive resin forms a film, phase separation or the formation of a dense barrier layer does not occur, maximizing the preservation of the original air and moisture permeability channels of the base film, ensuring the integrity of the moisture-sensitive response function, and thus improving the moisture-sensitive response speed of the fabric.

[0050] In summary, in this application, the latent crosslinking agent (selected from oxime-terminated alicyclic polyisocyanates or their derivatives) is chemically inert at room temperature, ensuring the rheological stability of the printing paste during the printing process. During the baking process, the end-capping agent in the latent crosslinking agent dissociates and releases isocyanate groups. The isocyanate groups react with the amino and / or hydroxyl groups in the moisture-sensitive resin (or the surface-active groups of the fiber; if the fiber contains functional groups that can undergo crosslinking reactions with isocyanate groups, then the functional groups will undergo crosslinking reactions with the isocyanate groups) to form a semi-interpenetrating network structure. This semi-interpenetrating network structure allows water molecules to enter and exit, giving the fabric moisture-sensitive response characteristics. Furthermore, this semi-interpenetrating network structure can also limit the excessive swelling and movement of hydrophilic segments, preventing the moisture-sensitive resin from dissociating or falling off under the shear force of water washing, thereby improving the moisture-sensitive properties and water-washing stability of the fabric.

[0051] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A water-resistant and wash-stable wet-sensitive printing paste composition, characterized in that, The product comprises a moisture-sensitive resin, an interface anchoring agent, a rheology modifier, a latent crosslinking agent, and water. The moisture-sensitive resin contains amino and / or hydroxyl groups, and the latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives.

2. The water-resistant and wash-stable wet-sensitive printing paste composition as described in claim 1, characterized in that, The moisture-sensitive resin is selected from at least one of polyether polyurethane, polyester polyurethane and amino-terminated polyurethane; And / or, the latent crosslinking agent is selected from isophorone diisocyanate trimers capped with methyl ethyl ketone oxime.

3. The water-resistant and wash-stable wet-sensitive printing paste composition as described in claim 2, characterized in that, The interface anchoring agent is selected from at least one of γ-glycidoxypropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, and 3-mercaptopropyltriethoxysilane.

4. The water-resistant and wash-stable wet-sensitive printing paste composition as described in claim 3, characterized in that, The rheology modifier is selected from associative polyurethane thickeners.

5. The water-resistant and wash-stable wet-sensitive printing paste composition as described in claim 4, characterized in that, The mass ratio of the moisture-sensitive resin, the interface anchoring agent, the rheology modifier, the latent crosslinking agent, and water is 60-80. 0.5-1：1.5-2：1-5：16-28。 6. A method for preparing a water-resistant, wash-stable, wet-sensitive printing paste, characterized in that, Includes the following steps: S1. Mix the moisture-sensitive resin, interface anchoring agent and water, stir to obtain a base slurry, wherein the moisture-sensitive resin contains amino and / or hydroxyl groups; S2. Add rheology modifier dropwise to the base paste while stirring until the paste becomes a milky white paste. Then add latent crosslinking agent and water, stir, add defoamer, filter, and obtain the water-resistant and stable wet-sensitive printing paste. The latent crosslinking agent is selected from oxime-terminated alicyclic polyisocyanates or their derivatives.

7. The preparation method according to claim 6, characterized in that, In step S1, stir at a speed of 1000-1500 rpm.

8. The preparation method according to claim 7, characterized in that, In step S1, the stirring time is 10-15 minutes.

9. A water-resistant, wash-stable, moisture-sensitive printing paste prepared according to the preparation method described in claim 7 or 8.

10. The application of the water-resistant, wash-stable, moisture-sensitive printing paste as described in claim 9 in textiles.

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