A general-purpose type flocking emulsion for non-woven water jet cloth and a preparation method thereof

Abstract

The present application relates to the technical field of acrylic resin flocking, and specifically discloses a general-purpose flocking emulsion for non-woven fabric water-jet fabric and a preparation method thereof, wherein the general-purpose flocking emulsion for non-woven fabric water-jet fabric comprises, by weight, 90-110 parts of deionized water, 20-40 parts of ethyl acrylate, 9-10 parts of butyl acrylate, 0.5-1 part of polymerizable vinyl silane, 4-6 parts of acrylic acid, 2-3 parts of methacrylic acid, 2-4 parts of acrylonitrile, 0.6-1.0 part of long-chain alkyl alcohol polyoxyethylene ether methacrylate, 3.4-6.0 parts of functional monomer, 0.8-1.2 parts of emulsifier, and 0.1-0.3 part of initiator. The flocking emulsion provided by the present application has high thickening capacity, high thickening efficiency, good thickening state, good flowability and leveling property, and high stability, and is very suitable for large-batch continuous production. The flocking product prepared by the present application has softness, resilience, and dry and wet rubbing fastness that are significantly better than those of similar products on the market.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flocking acrylic resin, and particularly relates to a general-purpose flocking emulsion for non-woven water-jet fabric and a preparation method thereof. BACKGROUND

[0002] In recent years, the market of non-woven water-jet fabric flocking decorations has developed rapidly, and the flocking surface of the non-woven water-jet fabric flocking decorations has a unique embroidery decoration effect and a strong three-dimensional visual effect, and has the properties of heat insulation, stain resistance and easy cleaning. The construction process of the non-woven water-jet fabric flocking decorations is simple, and the non-woven water-jet fabric flocking decorations are suitable for mass production of mechanization and industrialization, are cheap and good, are loved and pursued by consumers at home and abroad, and have various grades and types.

[0003] It is known that an adhesive is the most critical factor for determining the quality and cost of a flocking product. The adhesive not only provides basic properties of the flocking product such as softness, resilience and adhesion, but also provides machine viscosity of flocking paste mainly by thickening degree of the adhesive. If the thickening degree is too low, the viscosity is not enough, and the adhesive coating is easily penetrated and penetrated to the bottom in the machine process, so that the glue amount is thin, and the hand feeling fullness and fastness are affected. At present, the adhesives for non-woven water-jet fabric on the market are mainly based on acrylic emulsion. Non-woven fabric is generally used for high-end products, and the solid content of the adhesive used is generally about 24%. The requirements for softness, resilience and fullness of the adhesive are higher. In order to achieve high thickening degree, a large amount of acrylic acid or methacrylic acid monomer is generally introduced into the synthesis of the adhesive to provide carboxyl groups, and then a neutralizing agent is added to neutralize the carboxyl groups into salt, so that electrostatic repulsion and hydration are generated in the molecule, the free water of the system is reduced, and the viscosity is improved. However, since acrylic acid and methacrylic acid belong to hard monomers with high tg value, a large amount of hard monomers will reduce the elastic modulus and strength of the adhesive, thereby affecting the hand feeling and resilience. If the amount of acrylic acid is large, the gel rate of polymerization reaction increases, the system is easy to be unstable, the thickening of the emulsion is too steep, the thickening state is deviated, the flowability is decreased, and the time efficiency is poor, which causes loss. The method of adding softener and compounding soft resin to improve the hand feeling will cause the decrease of thickening efficiency and thickening viscosity of the system, and also increase the production process. Non-woven water-jet fabric is generally used for medium and low-end products with large amount, and the solid content of the adhesive used is generally about 8%-12%. At present, there is no adhesive with low solid content and high thickening degree on the market. Basically, a large amount of thickening agent is added to achieve the machine viscosity, but the thickening agent is not only expensive, but also causes the hand feeling to be hard and the fastness to be poor. In addition, the addition of the thickening agent and improper collocation can easily cause the viscosity of the paste to be unstable, the thickening to be increased, and even the paste to be gelled, which seriously affects the quality and normal continuous production of the product, causes a large amount of loss, and increases the cost.

[0004] Therefore, it is the development trend and direction of the non-woven fabric spunlace fabric flocking industry to develop a high thickening high-performance non-woven fabric spunlace fabric universal flocking emulsion, and it is also a pain point that needs to be solved in the development process of each industry enterprise, and has wide market demand and economic benefits. SUMMARY

[0005] In view of the shortcomings of the prior art, the purpose of the present application is to provide a non-woven fabric spunlace fabric universal flocking emulsion and a preparation method thereof, aiming to solve the problem of poor thickening ability of the existing flocking emulsion.

[0006] The technical scheme of the present application is as follows:

[0007] A non-woven fabric spunlace fabric universal flocking emulsion, wherein, by weight, 90-110 parts of deionized water, 20-40 parts of ethyl acrylate, 9-10 parts of butyl acrylate, 0.5-1 part of polymerizable vinyl silane, 4-6 parts of acrylic acid, 2-3 parts of methacrylic acid, 2-4 parts of acrylonitrile, 0.6-1.0 parts of long-chain alkyl alcohol polyoxyethylene ether methacrylate, 3.4-6.0 parts of functional monomer, 0.8-1.2 parts of emulsifier and 0.1-0.3 parts of initiator are included.

[0008] The non-woven fabric spunlace fabric universal flocking emulsion, wherein the functional monomer is one or more of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl acrylate and glycidyl methacrylate.

[0009] The non-woven fabric spunlace fabric universal flocking emulsion, wherein the emulsifier is one or more of sodium alkylbenzenesulfonate, alkyl alcohol polyether ammonium sulfate and sodium alkyl alcohol ether sulfate.

[0010] The non-woven fabric spunlace fabric universal flocking emulsion, wherein the polymerizable vinyl silane is one or more of vinyl triethoxysilane, vinyl tri(beta-methoxyethoxy)silane and vinyl trimethoxysilane.

[0011] The non-woven fabric spunlace fabric universal flocking emulsion, wherein the initiator is one or more of ammonium persulfate, sodium persulfate and potassium persulfate.

[0012] A preparation method of a non-woven fabric spunlace fabric universal flocking emulsion, wherein it includes the following steps:

[0013] Deionized water 45-82 parts, emulsifier 0.2-0.3 parts are added to the polymerization kettle, stirred and heated to a first predetermined temperature, and a primer solution is prepared;

[0014] Into a pre-emulsification tank, 20-40 parts of ethyl acrylate, 9-10 parts of butyl acrylate, 0.5-1 part of polymerizable vinyl silane, 4-6 parts of acrylic acid, 2-3 parts of methacrylic acid, 2-4 parts of acrylonitrile, 0.6-1.0 part of long-chain alkyl alcohol polyoxyethylene ether methacrylate, 3.4-6 parts of functional monomer, 0.6-0.9 part of emulsifier, and 18-25 parts of deionized water are added and stirred to mix into a uniform pre-emulsification liquid;

[0015] Into an initiator tank, 0.1-0.3 parts of initiator and 10-20 parts of deionized water are added and stirred to mix into a uniform initiator solution at normal temperature and pressure;

[0016] Into the polymerization kettle containing the primer liquid, 2%-5% of the total amount of the pre-emulsification liquid and 20%-30% of the total amount of the initiator solution are added, and after 5-10 minutes, the remaining pre-emulsification liquid and the remaining initiator solution are simultaneously added dropwise into the polymerization kettle. After the dropwise addition is completed, the temperature in the polymerization kettle is controlled at a second predetermined temperature and maintained for a predetermined time, thereby obtaining the non-woven fabric hydroentangled fabric general-purpose flocking emulsion.

[0017] The preparation method of the non-woven fabric hydroentangled fabric general-purpose flocking emulsion, wherein the first predetermined temperature is 68-72℃.

[0018] The preparation method of the non-woven fabric hydroentangled fabric general-purpose flocking emulsion, wherein the second predetermined temperature is 72-78℃ and the predetermined time is 40-100 min.

[0019] Beneficial effects: the non-woven fabric water jet cloth universal flocking emulsion provided by the application is prepared by copolymerizing polymerizable vinyl silane (silicone) and acrylate (including ethyl acrylate and butyl acrylate), so that the silicone is chemically bonded with the generated polyacrylate, the adhesion of the resin to the non-woven fabric water jet cloth is strengthened, and the treated flocking coating has better hand feeling and softness, higher scratch resistance and stain resistance; further, in the main chain structure mainly composed of acrylate, the reactive surface-active associated monomer long-chain alkyl alcohol polyoxyethylene ether methacrylate is introduced for copolymerization, the polymer molecule side chain is grafted with a long chain having a surface-active structure, therefore, the long chain structure has hydrophobic groups and hydrophilic groups, so it also has surface activity, and it can form a large micellar structure in water, and can be mutually adsorbed and associated within or between molecules. In addition, the hydrophilic groups in the main chain and the side chain can be adsorbed with water molecules by hydrogen bonding, so that the hydrophobic groups are adsorbed with other lipophilic groups of the latex particles, forming a large three-dimensional network structure, thereby achieving thickening effect, and due to the presence of the associated monomer, the state and leveling property after thickening are also significantly improved. The non-woven fabric water jet cloth universal flocking emulsion provided by the application has outstanding comprehensive performance, wide application, and truly realizes multi-grade and multi-purpose of one resin, can significantly improve production efficiency and reduce loss, and has very high cost performance compared with most existing same type acrylate flocking emulsions on the market. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The preparation method flow chart of the non-woven fabric water jet cloth universal flocking emulsion of the application. DETAILED DESCRIPTION

[0021] The application provides a non-woven fabric water jet cloth universal flocking emulsion and a preparation method thereof, in order to make the purpose, technical scheme and effects of the application more clear and explicit, the application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0022] The application provides a non-woven fabric water jet cloth universal flocking emulsion, which is prepared from the following raw materials in parts by weight: deionized water 90-110 parts, ethyl acrylate 20-40 parts, butyl acrylate 9-10 parts, polymerizable vinyl silane 0.5-1 part, acrylic acid 4-6 parts, methacrylic acid 2-3 parts, acrylonitrile 2-4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate 0.6-1.0 part, functional monomer 3.4-6.0 parts, emulsifier 0.8-1.2 parts and initiator 0.1-0.3 parts.

[0023] The universal flocking emulsion for non-woven fabric water jet fabric provided by the present application is prepared by copolymerizing polymerizable vinyl silane (silicone) and acrylate (including ethyl acrylate and butyl acrylate), so that the silicone is chemically bonded to the generated polyacrylate, the adhesion of the resin to the non-woven fabric water jet fabric is strengthened, and the treated flocking coating has good hand feeling and softness, higher scratch resistance and stain resistance.

[0024] Further, in the main structure with acrylate as the main chain, the long-chain alkyl alcohol polyoxyethylene ether methacrylate associative monomer with surface activity is introduced for copolymerization, the polymer molecule side chain is grafted with a long chain with surface active structure, and therefore, the long chain structure has both hydrophobic groups and hydrophilic groups, so it also has surface activity. They can form a large micellar structure in water and mutually adsorb and associate within or between molecules. In addition, the hydrophilic groups in the main chain and side chain can be adsorbed with water molecules through hydrogen bonding, and the hydrophobic groups thereof can be mutually adsorbed with other lipophilic groups of latex particles, forming a large three-dimensional network structure, thereby achieving thickening effect, and due to the presence of the associative monomer, the state and leveling property after thickening are significantly improved. Specifically, the hydrophobic group is also called the lipophilic group, and the two can be attracted to each other through the Van der Waals force between them. Emulsion polymerization is a polymerization method in which high polymers are produced by free radical addition polymerization or ionic addition polymerization in latex particles isolated from each other according to micellar mechanism or oligomer mechanism in an emulsion using water or other liquid as a medium.

[0025] In the present application, the ethyl acrylate and butyl acrylate serve as soft monomers to provide film-forming property and softness of the acrylic resin, the methacrylic acid and the acrylic acid can provide carboxyl groups for the polymer, and the carboxyl groups can achieve self-thickening effect through neutralization by an alkali; the acrylonitrile serves as a hard monomer to improve the adhesion of the acrylic resin; and the long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM serves as a hydrophobic modification monomer to significantly improve the thickening effect and leveling property of the acrylic resin.

[0026] The universal flocking emulsion for non-woven fabric water jet fabric provided by the present application has outstanding comprehensive performance, wide applicability, and can truly achieve multiple purposes with multiple grades of resin, significantly improves production efficiency and reduces loss, and has very high cost performance compared with most existing same type acrylate flocking emulsions on the market.

[0027] In some embodiments, the functional monomer is one or more of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl acrylate, and glycidyl methacrylate, but the application is not limited thereto. In this embodiment, the functional monomer provides a proper crosslinking group, and the polar group attached to the functional monomer can form an intermolecular force with the polar group of the flocking bristles to improve the fastness, and a certain amount of hydroxyl group can also improve the stability of the emulsion.

[0028] In some embodiments, the emulsifier is one or more of sodium alkyl benzene sulfonate, ammonium alkyl alcohol polyether sulfate, and sodium alkyl alcohol ether sulfate, but the application is not limited thereto. The emulsifiers selected in this embodiment are all anionic emulsifiers, which form anionic groups when hydrolyzed, so that the polymer molecular chain is negatively charged, the intramolecular and intermolecular charges repel each other, the polymer macromolecular chain gradually extends from the curled state to the straight state to form an extended layer, water molecules enter the extended layer to increase the apparent volume, hinder the flowability of water molecules, and cause the viscosity of the emulsion to increase, thereby improving the thickening effect of the emulsion.

[0029] In some embodiments, the polymerizable vinyl silane is one or more of vinyl triethoxysilane, vinyl tri(β-methoxyethoxy)silane, and vinyl trimethoxysilane, but the application is not limited thereto. In this embodiment, the polymerizable vinyl silane monomer can introduce Si-O-Si bonds into the polymer main chain, and since the silicon-oxygen bond can rotate freely, it can reduce the intermolecular force of the polymer, increase the sliding property of the polymer molecules, and reduce the surface friction coefficient of the polymer after film formation, thereby improving the rubbing fastness and softness of the polymer resin.

[0030] In some embodiments, the initiator is one or more of ammonium persulfate, sodium persulfate, and potassium persulfate, but the application is not limited thereto. In this embodiment, persulfate is used as the initiator because it has a relatively slow reaction rate, the reaction is easy to control, it is safe and inexpensive.

[0031] In some embodiments, a method for preparing a general-purpose spunlace fabric flocking emulsion for non-woven fabric is also provided, as shown in Figure 1 The method comprises the steps of:

[0032] S10, adding 45-82 parts of deionized water and 0.2-0.3 parts of emulsifier to a polymerization kettle, stirring and heating to a kettle temperature of a first predetermined temperature to prepare a primer solution;

[0033] S20, adding ethyl acrylate 20-40 parts, butyl acrylate 9-10 parts, polymerizable vinyl silane 0.5-1 part, acrylic acid 4-6 parts, methacrylic acid 2-3 parts, acrylonitrile 2-4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate 0.6-1.0 parts, functional monomer 3.4-6 parts, emulsifier 0.6-0.9 parts, deionized water 18-25 parts into the pre-emulsification tank at normal temperature and pressure, and stirring and mixing into a uniform pre-emulsified liquid;

[0034] S30, adding initiator 0.1-0.3 parts, deionized water 10-20 parts into the initiator tank at normal temperature and pressure, stirring and mixing to prepare a uniform initiator solution;

[0035] S40, adding 2%-5% of the total amount of pre-emulsified liquid and 20%-30% of the total amount of initiator solution into the polymerization kettle containing the primer liquid, after 5-10 minutes, simultaneously adding the remaining pre-emulsified liquid and the remaining initiator solution into the polymerization kettle, after the dripping is completed, controlling the temperature in the polymerization kettle to be at the second predetermined temperature and keeping the temperature for a predetermined time, to prepare the non-woven fabric water jet cloth general type flocking emulsion.

[0036] The high thickening high performance non-woven fabric water jet cloth general type flocking emulsion of the application is prepared by using a lower amount of vinyl unsaturated acid, crosslinking monomer and an appropriate amount of emulsifier, and has stable and controllable reaction, excellent mechanical stability and very excellent chemical stability, which can meet various process requirements; and the production process is simple and very suitable for mass continuous production.

[0037] In some embodiments, after keeping the temperature at the second predetermined temperature for a predetermined time, a defoaming agent and a mildew-proof fungicide can also be added into the polymerization kettle, stirring for 20 minutes, and filtering the material to prepare a high thickening non-woven fabric water jet cloth general type flocking emulsion with mildew-proof fungicide performance.

[0038] In some embodiments, the first predetermined temperature is 68-72℃, the second predetermined temperature is 72-78℃, and the predetermined time is 40-100min, but is not limited thereto.

[0039] The application will be further explained and described below through specific examples:

[0040] Example 1

[0041] The raw material composition of the high thickening high performance non-woven fabric spunlace fabric general type flocking emulsion includes the following components in parts by weight: deionized water 100 parts, ethyl acrylate 30 parts, butyl acrylate 9 parts, polymerizable vinyl silane 0.5 parts, acrylic acid 4 parts, methacrylic acid 2 parts, acrylonitrile 4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 0.6 parts, functional monomer 3.8 parts, emulsifier 1 part, initiator 0.2 part. Among them, the functional monomer is hydroxyethyl acrylate, the emulsifier is sodium alkyl benzene sulfonate, the polymerizable vinyl silane is vinyl triethoxysilane, and the initiator is sodium persulfate.

[0042] A preparation method of the high thickening high performance non-woven fabric spunlace fabric general type flocking emulsion as described above, comprising the following steps:

[0043] a. Preparation of base liquid A in the reaction cylinder: add deionized water 60 parts, emulsifier 0.2 parts to the polymerization kettle with stirrer, condenser and feeding device, and heat to a kettle temperature of 68℃;

[0044] b. Preparation of pre-emulsion B: under normal temperature and pressure, add ethyl acrylate 30 parts, butyl acrylate 9 parts, vinyl triethoxysilane 0.5 parts, acrylic acid 4 parts, methacrylic acid 2 parts, acrylonitrile 4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 0.6 parts, hydroxyethyl acrylate 3.8 parts, emulsifier 0.8 parts, deionized water 20 parts to the pre-emulsion tank with monomer metering tank and stirrer, and stir to mix into a uniform pre-emulsion, and stir for 25 minutes for standby;

[0045] c. Preparation of initiator solution C: under normal temperature and pressure, add initiator 0.2 parts, deionized water 20 parts to the initiator tank with stirrer and constant flow dropping device to prepare a uniform initiator solution;

[0046] d. When the temperature in the polymerization kettle reaches 68℃, add 2% of the total amount of pre-emulsion B and 20% of the total amount of initiator solution C to the kettle, after 8 minutes, add the remaining pre-emulsion B and 80% of the initiator solution C to the polymerization kettle through the constant flow pump feeding device and the constant flow dropping metering device, and the dropping time is controlled within 160 minutes;

[0047] e. After the dropping is completed, control the temperature in the polymerization kettle at 75℃ for 1 hour;

[0048] f. Cool to 20℃, add defoaming agent, mildew-proof fungicide to the reaction kettle, stir for 20 minutes, filter the discharge, and high performance high thickening non-woven fabric spunlace fabric general type flocking emulsion is obtained.

[0049] Example 2

[0050] The raw material composition of the high thickening high performance non-woven fabric water jet fabric general type flocking emulsion includes the following components in parts by weight: deionized water 100 parts, ethyl acrylate 40 parts, butyl acrylate 10 parts, polymerizable vinyl silane 0.8 parts, acrylic acid 6 parts, methacrylic acid 3 parts, acrylonitrile 3 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 0.8 parts, functional monomer 5 parts, emulsifier 1.2 parts, initiator 0.2 parts. The functional monomer is glycidyl acrylate, the emulsifier is alkyl alcohol polyether ammonium sulfate, the polymerizable vinyl silane is vinyl trimethoxysilane, and the initiator is ammonium persulfate.

[0051] A preparation method of the high thickening high performance non-woven fabric water jet fabric general type flocking emulsion as described above, which includes the following steps:

[0052] a. Preparation of base liquid A in the reaction cylinder: add deionized water 60 parts, emulsifier 0.2 parts to the polymerization kettle with stirrer, condenser and feeding device, and heat to a kettle temperature of 70℃;

[0053] b. Preparation of pre-emulsion B: under normal temperature and pressure, add ethyl acrylate 40 parts, butyl acrylate 10 parts, vinyl trimethoxysilane 0.8 parts, acrylic acid 6 parts, methacrylic acid 3 parts, acrylonitrile 3 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 0.8 parts, glycidyl acrylate 3.8 parts, emulsifier 1 part, deionized water 20 parts to the pre-emulsion tank with monomer metering tank and stirrer, and stir to mix into a uniform pre-emulsion, and stir for 20-30 minutes for standby;

[0054] c. Preparation of initiator solution C: under normal temperature and pressure, add initiator 0.2 parts, deionized water 20 parts to the initiator tank with stirrer and constant flow dropping device to prepare a uniform initiator solution;

[0055] d. When the temperature in the polymerization kettle reaches 68℃, add 4% of the total amount of pre-emulsion B and 20% of the total amount of initiator solution C to the kettle, and after 5 minutes, simultaneously add the remaining pre-emulsion B and 80% of the initiator solution C to the polymerization kettle through the constant flow pump feeding device and the constant flow dropping metering device, and the dropping time is controlled within 150 minutes;

[0056] e. After the dropping is completed, control the temperature in the polymerization kettle at 78℃ for 1 hour;

[0057] f. Cool to 30℃, add defoaming agent, mildew-proof fungicide to the reaction kettle, stir for 20 minutes, filter the discharge, and high performance high thickening non-woven fabric water jet fabric general type flocking emulsion is obtained.

[0058] Example 3

[0059] The raw material composition of the high thickening high performance non-woven fabric water jet fabric general type flocking emulsion includes the following components in parts by weight: deionized water 110 parts, ethyl acrylate 30 parts, butyl acrylate 10 parts, polymerizable vinyl silane 1 part, acrylic acid 5 parts, methacrylic acid 3 parts, acrylonitrile 4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 1.2 parts, functional monomer 6 parts, emulsifier 1.2 parts, initiator 0.3 parts. The functional monomer is hydroxypropyl acrylate, the emulsifier is sodium alkyl alcohol ether sulfate, the polymerizable vinyl silane is vinyl tri(β-methoxyethoxy)silane, and the initiator is potassium persulfate.

[0060] A preparation method of the high thickening high performance non-woven fabric water jet fabric general type flocking emulsion as described above, comprising the following steps:

[0061] g. Preparation of base liquid A in reaction cylinder: Add deionized water 70 parts, emulsifier 0.2 parts to the polymerization kettle with stirrer, condenser and feeding device, and heat to a kettle temperature of 72℃;

[0062] h. Preparation of pre-emulsion B: At normal temperature and pressure, add ethyl acrylate 30 parts, butyl acrylate 10 parts, polymerizable vinyl silane 1 part, acrylic acid 5 parts, methacrylic acid 3 parts, acrylonitrile 4 parts, long-chain alkyl alcohol polyoxyethylene ether methacrylate BEM 1.2 parts, emulsifier 1 part, deionized water 20 parts to the pre-emulsion tank with monomer metering tank and stirrer, and stir to form a uniform pre-emulsion, and stir for 30 minutes for standby;

[0063] i. Preparation of initiator solution C: At normal temperature and pressure, add initiator 0.3 parts, deionized water 20 parts to the initiator tank with stirrer and constant flow dropping device to prepare a uniform initiator solution;

[0064] j. When the temperature in the polymerization kettle reaches 72℃, add 5% of the total pre-emulsion B and 30% of the total initiator solution C to the kettle, and after 10 minutes, add the remaining pre-emulsion B and the remaining initiator solution C to the polymerization kettle through the constant flow pump feeding device and the constant flow dropping metering device, and the dropping time is controlled within 160 minutes;

[0065] k. After the dropping is completed, control the temperature in the polymerization kettle at 78℃ for 80 minutes;

[0066] l. Cool to 20℃, add defoaming agent, mildew-proof fungicide to the reaction kettle, stir for 20 minutes, filter the material, and high performance high thickening non-woven fabric water jet fabric general type flocking emulsion is obtained.

[0067] The emulsions prepared by the examples 1-3 of the present application were compared with commercially available 24% solid content external sample 1 (comparative example 1), external sample 2 (comparative example 2), and 8% solid content external sample 3 (comparative example 3) in various performances, and the test results of each sample are shown in Table 1. Among them, external sample 1 is a commercially available 24% solid content flocking emulsion (emulsion synthesis relies on a large amount of ordinary polymerization of acrylic acid), which is purchased from Shenzhen Gao's Adhesive Products Co., Ltd. GS-2035; external sample 2 is a commercially available 24% solid content flocking emulsion (containing thickening agent), which is purchased from Zhongshan Bailihui Chemical Co., Ltd.; external sample 3 is an 8% solid content flocking emulsion, which is purchased from Jiankang Science and Technology Chemical (Zhongshan) Co., Ltd. The test of thickening viscosity refers to GB / T 10247-2008, and the highest viscosity that each sample can reach at different pH values is tested; the rubbing fastness determination refers to GB / T 3920-2008, and a Y571C rubbing brush color fastness tester is used for testing; the resilience test is to observe the shrinkage of the flocking coating substrate after the flocking coating sample is stretched horizontally and vertically for 20 times; the softness test of hand feeling: the touch feeling of the flocking coating is divided into 5 levels, of which level 1 is very soft, level 2 is soft, level 3 is relatively soft, level 4 is relatively hard, and level 5 is hard.

[0068] Table 1 Performance test results

[0069]

[0070]

[0071] From the above test results, it can be seen that the high thickening high performance water-based acrylic non-woven fabric spunlace flocking emulsion stock solution and the dilution solution diluted to 8% solid content prepared by examples 1-3 have high thickening capacity, high thickening efficiency, good thickening state, good flowability and leveling property, high stability, and are very suitable for large-scale continuous production. The softness, resilience and dry and wet rubbing fastness of the flocking product prepared are significantly better than those of similar products on the market.

[0072] It should be understood that the application of the present application is not limited to the above examples, and those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A general-purpose flocking emulsion for nonwoven hydroentangled fabric, characterized by comprising: The weight parts include 90-110 parts of deionized water, 20-40 parts of ethyl acrylate, 9-10 parts of butyl acrylate, 0.5-1 part of polymerizable vinyl silane, 4-6 parts of acrylic acid, 2-3 parts of methacrylic acid, 2-4 parts of acrylonitrile, 0.6-1.0 part of long-chain alkyl alcohol polyoxyethylene ether methacrylate, 3.4-6.0 parts of functional monomer, 0.8-1.2 parts of emulsifier and 0.1-0.3 parts of initiator; wherein the polymerizable vinyl silane is one or more of vinyl triethoxysilane, vinyl tri(β-methoxyethoxy)silane and vinyl trimethoxysilane; the functional monomer is one or both of hydroxyethyl acrylate and hydroxypropyl acrylate; the emulsifier is one or more of sodium alkylbenzenesulfonate, alkyl alcohol polyether ammonium sulfate and sodium alkyl alcohol ether sulfate; the initiator is one or more of ammonium persulfate, sodium persulfate and potassium persulfate; the polymerizable vinyl silane is copolymerized with ethyl acrylate and butyl acrylate, so that the polymerizable vinyl silane is chemically bonded with the generated polyacrylate, the adhesion of the resin to the non-woven water-jet fabric is strengthened, and the treated flocked coating has better hand feeling and softness, higher scratch resistance and stain resistance.

2. A method for preparing the general-purpose flocking emulsion for nonwoven hydroentangled fabric according to claim 1, characterized by, It includes the steps of: adding 45-82 parts of deionized water and 0.2-0.3 parts of emulsifier to a polymerization kettle, stirring and heating to a kettle temperature of a first predetermined temperature, and preparing a primer solution, wherein the first predetermined temperature is 68-72°C; adding 20-40 parts of ethyl acrylate, 9-10 parts of butyl acrylate, 0.5-1 part of polymerizable vinyl silane, 4-6 parts of acrylic acid, 2-3 parts of methacrylic acid, 2-4 parts of acrylonitrile, 0.6-1.0 part of long-chain alkyl alcohol polyoxyethylene ether methacrylate, 3.4-6 parts of functional monomer, 0.6-0.9 parts of emulsifier and 18-25 parts of deionized water to a pre-emulsification tank at normal temperature and pressure, and stirring and mixing to form a uniform pre-emulsification solution; adding 0.1-0.3 parts of initiator and 10-20 parts of deionized water to an initiator tank at normal temperature and pressure, stirring and mixing to prepare a uniform initiator solution; adding 2%-5% of the total amount of the pre-emulsification solution and 20%-30% of the total amount of the initiator solution to the polymerization kettle containing the primer solution, and after 5-10 minutes, adding the remaining pre-emulsification solution and the remaining initiator solution to the polymerization kettle at the same time, controlling the temperature in the polymerization kettle at a second predetermined temperature after the addition is completed, and maintaining the temperature for a predetermined time, to prepare the non-woven water-jet fabric general-purpose flocked emulsion; the second predetermined temperature is 72-78°C, and the predetermined time is 40-100 min.

Images