Polyacrylate emulsion as well as preparation method and application thereof

Abstract

The invention relates to a polyacrylate emulsion as well as a preparation method and application thereof. The polyacrylate emulsion comprises the following components: an acrylate polymer, an emulsifier and a solvent, wherein reaction monomers of the acrylate polymer comprise functional monomers and basic monomers, the functional monomers comprise alkyl acrylate, organic fluorine monomers and organic silicon monomers, and the basic monomers comprise soft monomers and hard monomers. The fabric finished by the polyacrylate emulsion provided by the invention has excellent waterproof and oil-proof performance while keeping air permeability and softness.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof and oil-proof additives, and in particular to a polyacrylate emulsion and a preparation method and application thereof. Background Art

[0002] With the development of society and the advancement of technology, people's demand for textile fabrics is not only limited to warmth and comfort, but also gradually tends to diversified functions, such as waterproof, oil-proof and easy to remove dirt. The three-proof function care is to treat the fabric with one or several protective materials to change the surface properties of the fabric, so that the fabric is not easily wetted or stained by water and common oil stains, and give the fabric the functions of "easy to clean" and "self-cleaning", so that the dirt can roll off easily without staining the surface of the fabric, effectively reducing the number of washing times, and making the fabric super durable, anti-fading, anti-aging and other functions, which is beneficial to energy saving and environmental protection, and prolonging the service life of the fabric.

[0003] Fabrics that have been treated with the three-proof function can effectively resist the invasion of rain and cold wind, keep the human body dry and warm, and prevent the generation of bacteria and odor caused by long-term residual sweat, which helps to regulate the microclimate between human skin and clothing. However, the three-proof materials currently on the market have the problem of not being able to balance excellent hydrophobic and oleophobic properties with maintaining the breathability and softness of the fabric. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a polyacrylate emulsion and a preparation method and application thereof. The fabric finished with the polyacrylate emulsion provided by the present disclosure exhibits excellent waterproof and oil-proof properties, and the fabric softness and air permeability are maintained well.

[0005] In a first aspect, the present disclosure provides a polyacrylate emulsion, wherein the components of the polyacrylate emulsion include an acrylic polymer, an emulsifier and a solvent;

[0006] The reactive monomers of the acrylic ester polymer include functional monomers and basic monomers, the functional monomers include alkyl acrylate, organic fluorine monomers and organic silicon monomers, and the basic monomers include soft monomers and hard monomers.

[0007] As a preferred technical solution of the present disclosure, in the reaction monomers, the mass ratio of the basic monomer to the functional monomer is (1-2):1, such as 1.2:1, 1.4:1, 1.6:1, 1.8:1, etc.

[0008] As a preferred technical solution of the present disclosure, the mass ratio of the basic monomer to the functional monomer is 1.5:1, and the pre-emulsification and polymerization processes are more stable.

[0009] As a preferred technical solution of the present disclosure, the mass of the soft monomer is 50-70% of the total mass of the basic monomer, such as 55%, 60%, 65%, etc.

[0010] As a preferred technical solution of the present disclosure, based on the total mass of the reactive monomers as 100%, the content of the organic fluorine monomer is 16-24%, the content of the organic silicon monomer is 1-5%, the content of the alkyl acrylate is 10-20%, the content of the soft monomer is 30-40% and the content of the hard monomer is 20-30%.

[0011] Wherein, the content of the organic fluorine monomer may be 18%, 20%, 22% or the like.

[0012] The content of the organosilicon monomer may be 2%, 3%, 4%, etc.

[0013] The alkyl acrylate content may be 12%, 14%, 16%, 18%, etc.

[0014] The soft monomer content may be 32%, 34%, 36%, 38%, etc.

[0015] The hard monomer content may be 22%, 24%, 26%, 28%, etc.

[0016] As a preferred technical solution of the present disclosure, the alkyl acrylate is selected from any one of hexadecyl acrylate, octadecyl acrylate, octadecyl methacrylate or lauryl methacrylate, or a combination of at least two thereof.

[0017] As a preferred technical solution of the present disclosure, the organic fluorine monomer is selected from any one of tridecafluorooctyl acrylate, dodecafluoroheptyl acrylate, dodecafluoroheptyl methacrylate or hexafluorobutyl methacrylate, or a combination of at least two thereof.

[0018] As a preferred technical solution of the present disclosure, the organosilicon monomer is selected from vinyltrimethoxysilane and / or vinyltriethoxysilane.

[0019] As a preferred technical solution of the present disclosure, the soft monomer is selected from any one of butyl acrylate, n-butyl acrylate or lauryl acrylate, or a combination of at least two thereof.

[0020] As a preferred technical solution of the present disclosure, the hard monomer is selected from any one of methyl methacrylate, styrene or acrylonitrile, or a combination of at least two thereof.

[0021] As a preferred technical solution of the present disclosure, based on the total mass of the polyacrylate emulsion being 100%, the content of the acrylic polymer is 30-40%, such as 32%, 34%, 36%, 38%, etc., preferably 33%.

[0022] As a preferred technical solution of the present disclosure, based on the total mass of the polyacrylate emulsion being 100%, the content of the emulsifier is 1-5%, such as 2%, 3%, 4%, etc., preferably 3%.

[0023] As a preferred technical solution of the present disclosure, the emulsifier is selected from cationic emulsifiers and / or nonionic emulsifiers.

[0024] As a preferred technical solution of the present disclosure, the emulsifier is selected from a combination of a cationic emulsifier and a nonionic emulsifier. More preferably, the mass ratio of the cationic emulsifier to the nonionic emulsifier is (1-3):(1-3), for example, 3:1, 2:1, 1:1, 1:2, 1:3, etc.

[0025] As a preferred technical solution of the present disclosure, the cationic emulsifier is selected from any one of hexadecyltrimethylammonium bromide, octadecyltrimethylammonium bromide, and octadecyltrimethylammonium chloride, or a combination of at least two thereof.

[0026] As a preferred technical solution of the present disclosure, the nonionic emulsifier is selected from octylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

[0027] As a preferred technical solution of the present disclosure, the solvent includes an organic solvent and water.

[0028] As a preferred technical solution of the present disclosure, based on the total mass of the polyacrylate emulsion as 100%, the content of the organic solvent is 15-20%, for example, 16%, 17%, 18%, 19%, etc., more preferably 18%.

[0029] As a preferred technical solution of the present disclosure, the organic solvent is selected from any one of acetone, ethanol or tripropylene glycol, or a combination of at least two of them.

[0030] In a second aspect, the present disclosure provides a method for preparing the polyacrylate emulsion according to the first aspect, the preparation method comprising the following steps:

[0031] (1) dissolving an emulsifier, a functional monomer and a basic monomer in a solvent for pre-emulsification reaction to obtain a pre-emulsion;

[0032] (2) adding an initiator to the pre-emulsion under a protective atmosphere to carry out a polymerization reaction to obtain the polyacrylate emulsion.

[0033] As a preferred technical solution of the present disclosure, the pre-emulsification reaction time in step (1) is 20-30 min, for example, 22 min, 24 min, 26 min, 28 min, etc.

[0034] As a preferred technical solution of the present disclosure, the protective atmosphere in step (2) is nitrogen, argon, etc.

[0035] As a preferred technical solution of the present invention, based on the total mass of the functional monomer and the basic monomer as 100%, the amount of the initiator used in step (2) is 0.5-3% of the total mass of the functional monomer and the basic monomer, for example, 1.0%, 1.5%, 2.0%, 2.5%, etc.

[0036] As a preferred technical solution of the present disclosure, the temperature of the polymerization reaction in step (2) is 78-85°C, for example, 79°C, 80°C, 81°C, 82°C, 83°C, 84°C, etc., and the time of the polymerization reaction is 100-150min, for example, 110min, 120min, 130min, 140min, etc.

[0037] As a preferred technical solution of the present disclosure, the initiator in step (2) is selected from any one of ammonium persulfate, potassium persulfate or azobisisobutylamidine hydrochloride, or a combination of at least two thereof.

[0038] As a preferred technical solution of the present disclosure, the polymerization reaction in step (2) comprises the following steps: mixing 25-35% of the pre-emulsion and 25-35% of the initiator for polymerization reaction to obtain a seed emulsion, and then dripping the remaining pre-emulsion and initiator into the seed emulsion for polymerization reaction to obtain the polyacrylate emulsion.

[0039] The 25-35% may be 28%, 30%, 32%, 34% and the like.

[0040] As a preferred technical solution of the present disclosure, the dropping time is 90-120 min, for example, 95 min, 100 min, 105 min, 110 min, 115 min, etc.

[0041] As a preferred technical solution of the present disclosure, after the remaining pre-emulsion and the initiator are added dropwise, the mixture is kept warm for 120 minutes to obtain the polyacrylate emulsion.

[0042] As a specific embodiment of the present disclosure, the preparation method comprises the following steps:

[0043] (1) dissolving an emulsifier in a solvent, stirring to obtain an emulsifier solution, then adding a functional monomer and a base monomer, and performing a pre-emulsification reaction under stirring for 20-30 minutes to obtain a pre-emulsion;

[0044] (2) Mix 25-35% of the pre-emulsion and 25-35% of the initiator under a protective atmosphere, heat to 78-85° C. for polymerization to obtain a seed emulsion, and after the emulsion exhibits blue light, slowly and uniformly add the remaining pre-emulsion and initiator to the seed emulsion for polymerization, respectively, for 90-120 min, keep warm for 120 min, filter, and obtain the polyacrylate emulsion.

[0045] In a third aspect, the present disclosure provides an application of the polyacrylate emulsion described in the first aspect in the waterproofing, oil-proofing, and corrosion-proofing of fabrics, fibers, fabrics, leather, non-woven fabrics, paper, construction, aerospace, and electronic protective coatings, preferably in the waterproofing and oil-proofing of fabrics.

[0046] In a fourth aspect, the present disclosure provides a method for finishing fabric using the polyacrylate emulsion described in the first aspect, the method comprising: finishing the fabric using the polyacrylate emulsion and then drying it.

[0047] As a preferred technical solution of the present disclosure, the finishing method includes dipping and spraying.

[0048] As a preferred technical solution of the present disclosure, the finishing time is 0.5-1 h, such as 0.6 h, 0.7 h, 0.8 h, 0.9 h, etc., so that the polyacrylate emulsion completely fills the surface of the fabric.

[0049] As a preferred technical solution of the present disclosure, the drying temperature is above 120°C, for example, 140°C, 160°C, 180°C, 200°C, etc., more preferably 150°C.

[0050] As a preferred technical solution of the present disclosure, the drying time is 5-15 minutes, for example, 6 minutes, 8 minutes, 10 minutes, 12 minutes, 14 minutes, etc.

[0051] In a fifth aspect, the present disclosure provides use of the polyacrylate emulsion described in the first aspect in clothing care and washing.

[0052] In a sixth aspect, the present disclosure provides use of the polyacrylate emulsion described in the first aspect in a washing device, preferably in a clothing care module of a washing device.

[0053] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0054] 1. The polyacrylate emulsion provided in the present invention is compounded with fluorine and silicon to achieve excellent waterproof and oil-proof properties while maintaining air permeability and softness of the finished fabric.

[0055] 2. The polyacrylate emulsion polymer prepared by combining a cationic emulsifier with a nonionic emulsifier disclosed in the present invention has a stronger bond with the negatively charged treated substrate, a more lasting effect, better water washability, and has both anti-corrosion and antistatic effects.

[0056] 3. The preparation method provided by the present disclosure using the pre-emulsification process and semi-continuous emulsion polymerization can control the reaction rate and heat release rate, so that the final polyacrylate emulsion polymer protective material can remain non-stratified for a long time and has strong stability, and can be widely used in industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0059] Figure 1 This is a schematic diagram of the preparation process of Example 1 of the present disclosure. DETAILED DESCRIPTION

[0060] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0061] At present, the common low surface energy materials on the market are mainly fluorine-containing and silicone-containing materials. Organic fluorine protective materials have excellent hydrophobic and oleophobic effects. The higher the fluorine content, the lower the surface energy of the system and the better the hydrophobic and oleophobic effects. However, organic fluorine protective materials will damage the feel and softness of the fabric. Organic silicone protective materials have a hydrophobic effect and will not damage the softness of the material, but organic silicone materials have a poor oleophobic effect and a relatively simple protective effect. Therefore, the embodiments of the present disclosure provide a polyacrylate emulsion and a preparation method and application thereof.

[0062] Specifically, the embodiment of the present disclosure provides a polyacrylate emulsion, the components of which include an acrylic polymer, an emulsifier and a solvent;

[0063] The reactive monomers of the acrylic ester polymer include functional monomers and basic monomers, the functional monomers include alkyl acrylate, organic fluorine monomers and organic silicon monomers, and the basic monomers include soft monomers and hard monomers.

[0064] The polyacrylate emulsion provided in the embodiment of the present disclosure uses a fluorine-silicon compounding system to achieve excellent waterproof and oil-proof functional properties for the finished fabric while maintaining air permeability and softness. Specifically:

[0065] In the polyacrylate emulsion provided in the embodiments of the present disclosure, organic fluorine can provide excellent hydrophobic and oleophobic effects, and organic silicon can form a continuous alkyl layer on the surface of the fabric, so that the fabric obtains a hydrophobic hydrocarbon surface. At the same time, organic silicon has the characteristics of low surface tension and small friction coefficient, which can improve the softness of the material. The prepared polyacrylate emulsion fluorine-silicone composite protective material has the advantages of both fluorine-containing and silicon-containing materials, has excellent hydrophobic, oleophobic and stain-repellent properties, and has a good feel and softness, and has a very huge market application prospect.

[0066] In an embodiment of the present disclosure, in the reaction monomer, the mass ratio of the base monomer to the functional monomer is (1-2):1, such as 1.2:1, 1.4:1, 1.6:1, 1.8:1, etc.

[0067] When the mass ratio of the basic monomer to the functional monomer provided in the embodiments of the present disclosure is within the above range, a polyacrylate emulsion with excellent performance can be obtained. When the content of the functional monomer is too much or even exceeds the content of the basic monomer, the pre-emulsification of the emulsion will not be smooth. Even under long-term stirring and homogenization, the emulsion will still quickly stratify and present visible oily droplets. Moreover, the polymerization stability of the emulsion is also very poor. Adding a small amount of initiator under low-speed stirring will produce a large amount of gel, and the monomer conversion rate and polymerization rate are very low.

[0068] Furthermore, the mass ratio of the basic monomer to the functional monomer is 1.5:1, and the pre-emulsification and polymerization processes are more stable.

[0069] In the embodiment of the present disclosure, the mass of the soft monomer is 50-70% of the total mass of the basic monomer, for example, 55%, 60%, 65%, etc.

[0070] The basic monomers described in the embodiments of the present disclosure include soft monomers and hard monomers, wherein the soft monomers are relatively soft, have sufficient cold fluidity, are easy to wet the surface of the adherend, can quickly fill the unevenness of the adhesion surface, and have good initial adhesion and peel strength. However, if the glass transition temperature is too low, the polymer is too soft, and the cohesive performance is not ideal, which will affect the application performance of the polymer. Therefore, the embodiments of the present disclosure utilize a cohesive monomer (hard monomer) with a higher glass transition temperature to copolymerize with a viscous monomer (soft monomer) to improve the cohesive force, so as to obtain better cohesive strength and a higher use temperature, while improving the water resistance, bonding strength and transparency of the polymer.

[0071] When the content of the soft monomer provided in the embodiments of the present disclosure is within the above range, a polyacrylate emulsion with excellent performance can be obtained. If the content of the soft monomer is too high or too low, the emulsion will be unstable, causing phase separation, precipitation, gelation, etc. in the emulsion during the polymerization process, thereby affecting the polymerization and the quality of the polymer emulsion. Too much soft monomer content may cause the performance of the polymer emulsion to decrease. For example, an increase in the content of the soft monomer may cause the glass transition temperature (T g ) is reduced, making the polymer softer, but reducing the strength, hardness and other mechanical properties of the polymer. The increase in the content of hard monomers will cause the structure of the polymer to become compact, thus affecting the polymer's morphology, molecular weight distribution and other properties. When the content of hard monomers is too high, the polymer structure is too dense, which will increase the glass transition temperature of the polymer, making the polymer harder and more brittle, thereby reducing the toughness and softness of the polymer.

[0072] In the embodiment of the present disclosure, based on the total mass of the reactive monomers as 100%, the content of the organic fluorine monomer is 16-24%, the content of the organic silicon monomer is 1-5%, the content of the alkyl acrylate is 10-20%, the content of the soft monomer is 30-40% and the content of the hard monomer is 20-30%.

[0073] Wherein, the content of the organic fluorine monomer may be 18%, 20%, 22% or the like.

[0074] In the embodiments of the present disclosure, too low an organic fluorine monomer content will affect the oleophobic effect of the fabric, while too high an organic fluorine monomer content will not have much effect on the polymerization stability and storage stability of the emulsion. However, when the amount of organic fluorine monomer used exceeds the range described in the present disclosure, more fluorine-containing monomers will no longer improve the hydrophobic and oleophobic effect of the latex film, but will instead lead to increased costs.

[0075] The content of the organosilicon monomer may be 2%, 3%, 4%, etc.

[0076] In the disclosed embodiments, the organosilicon monomer is mainly used to improve the adhesion of the emulsion to the substrate, and to improve the cohesion of the emulsion through self-crosslinking, so as to improve the cohesive strength, oil resistance, heat resistance and aging resistance. In the disclosed embodiments, the content of the organosilicon monomer is controlled within the range of 1%-5%. Excessive amounts will not only cause the emulsion polymerization to produce a large amount of gel, but may also cause the storage stability of the emulsion to decrease. This is because the organosilicon monomer is very easy to hydrolyze in the water solvent to generate -Si-OH. When the amount of organosilicon monomer added is too much, the generated -Si-OH will undergo condensation crosslinking with each other, causing the organosilicon monomer to lose its polymerization reaction activity and causing an increase in the amount of gel in the system, thereby affecting the stability of the polymerization reaction.

[0077] The alkyl acrylate content may be 12%, 14%, 16%, 18%, etc.

[0078] The soft monomer content may be 32%, 34%, 36%, 38%, etc.

[0079] The hard monomer content may be 22%, 24%, 26%, 28%, etc.

[0080] In the embodiment of the present disclosure, the alkyl acrylate is selected from any one of hexadecyl acrylate, octadecyl acrylate, octadecyl methacrylate or lauryl methacrylate, or a combination of at least two thereof.

[0081] In an embodiment of the present disclosure, the organic fluorine monomer is selected from any one of tridecafluorooctyl acrylate, dodecafluoroheptyl acrylate, dodecafluoroheptyl methacrylate or hexafluorobutyl methacrylate, or a combination of at least two thereof.

[0082] The alkyl acrylate provided in the embodiments of the present disclosure can synergize with the short-chain organic fluorine monomer to improve the crystallinity of the organic fluorine monomer, thereby causing the fluorine-containing groups in the organic fluorine monomer to migrate to the surface, thereby improving the hydrophobic and oleophobic effects of the polymer emulsion.

[0083] In an embodiment of the present disclosure, the organosilicon monomer is selected from vinyltrimethoxysilane and / or vinyltriethoxysilane.

[0084] In the embodiment of the present disclosure, the soft monomer is selected from any one of butyl acrylate, n-butyl acrylate or lauryl acrylate, or a combination of at least two thereof.

[0085] The soft monomer provided in the embodiment of the present disclosure plays a role in encapsulating and stabilizing the emulsion particles in the emulsion polymerization, thereby maintaining the stability of the emulsion and preventing agglomeration and precipitation during the polymerization process. In addition, the soft monomer can also copolymerize with the hard monomer during the polymerization process to regulate the polymerization rate, degree of polymerization and structure, thereby affecting the performance of the final polymer.

[0086] In an embodiment of the present disclosure, the hard monomer is selected from any one or a combination of at least two of methyl methacrylate, styrene or acrylonitrile.

[0087] The hard monomer provided in the embodiment of the present disclosure plays a role in forming a polymer skeleton in emulsion polymerization, thereby giving the final polymer excellent mechanical properties, thermal stability and durability. The embodiment of the present disclosure achieves the regulation of polymer properties by selecting the type and content of the hard monomer, that is, by regulating the content and structure of the hard monomer, the glass transition temperature, strength, elastic modulus and other properties of the polymer are regulated.

[0088] In the embodiment of the present disclosure, based on the total mass of the polyacrylate emulsion being 100%, the content of the acrylic polymer is 30-40%, such as 32%, 34%, 36%, 38%, etc., preferably 33%.

[0089] In the embodiment of the present disclosure, based on the total mass of the polyacrylate emulsion being 100%, the content of the emulsifier is 1-5%, such as 2%, 3%, 4%, etc., preferably 3%.

[0090] In an embodiment of the present disclosure, the emulsifier is selected from a cationic emulsifier and / or a nonionic emulsifier.

[0091] Preferably, the emulsifier is selected from a combination of a cationic emulsifier and a nonionic emulsifier. More preferably, the mass ratio of the cationic emulsifier to the nonionic emulsifier is (1-3):(1-3), for example, 3:1, 2:1, 1:1, 1:2, 1:3, etc.

[0092] The polyacrylate emulsion polymer prepared by the embodiment of the present disclosure using a cationic emulsifier and a nonionic emulsifier has a stronger bond with the negatively charged treated substrate, a more durable effect, better washability, and has both antiseptic and antistatic effects. The polyacrylate emulsion polymer particles provided by the embodiment of the present disclosure have a positive charge, while the surfaces of most substrates such as cellulose fibers and fabrics have a negative charge, and the neutralization of the two gives it good bonding and adhesion. Cationic emulsifiers are more likely to coagulate when used alone, while nonionic emulsifiers have good electrolyte resistance and can produce a synergistic effect with the emulsifier, thereby exerting its emulsifying properties to produce a stable emulsion.

[0093] Preferably, the cationic emulsifier is selected from any one of cetyltrimethylammonium bromide, octadecyltrimethylammonium bromide, octadecyltrimethylammonium chloride, or a combination of at least two thereof.

[0094] Preferably, the nonionic emulsifier is selected from octylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

[0095] In the embodiment of the present disclosure, the cationic emulsifier may also be a reactive cationic emulsifier, such as R-303. While retaining the advantages of the cationic emulsifier, the soap-free emulsion of the reactive cationic emulsifier is grafted onto the polymer molecular chain in a chemical covalent bond manner, thereby improving the electrolyte stability and water resistance of the polyacrylate polymer.

[0096] In an embodiment of the present disclosure, the solvent includes an organic solvent and water.

[0097] Preferably, based on the total mass of the polyacrylate emulsion being 100%, the content of the organic solvent is 15-20%, such as 16%, 17%, 18%, 19%, etc., more preferably 18%.

[0098] Preferably, the organic solvent is selected from any one of acetone, ethanol or tripropylene glycol, or a combination of at least two thereof.

[0099] Accordingly, the present disclosure provides a method for preparing a polyacrylate emulsion, the method comprising the following steps:

[0100] (1) dissolving an emulsifier, a functional monomer and a basic monomer in a solvent for pre-emulsification reaction to obtain a pre-emulsion;

[0101] (2) adding an initiator to the pre-emulsion under a protective atmosphere to carry out a polymerization reaction to obtain the polyacrylate emulsion.

[0102] In an embodiment of the present disclosure, the pre-emulsification reaction time in step (1) is 20-30 min, for example, 22 min, 24 min, 26 min, 28 min, etc.

[0103] In the embodiment of the present disclosure, the protective atmosphere in step (2) is nitrogen, argon, etc.

[0104] In the embodiment of the present disclosure, based on the total mass of the functional monomer and the base monomer as 100%, the amount of the initiator used in step (2) is 0.5-3% of the total mass of the functional monomer and the base monomer, for example 1.0%, 1.5%, 2.0%, 2.5%, etc.

[0105] In the embodiment of the present disclosure, the temperature of the polymerization reaction in step (2) is 78-85°C, for example, 79°C, 80°C, 81°C, 82°C, 83°C, 84°C, etc., and the time of the polymerization reaction is 100-150min, for example, 110min, 120min, 130min, 140min, etc.

[0106] In an embodiment of the present disclosure, the initiator in step (2) is selected from any one of ammonium persulfate, potassium persulfate or azobisisobutylamidine hydrochloride, or a combination of at least two thereof.

[0107] In the embodiment of the present disclosure, the polymerization reaction in step (2) comprises the following steps: mixing 25-35% of the pre-emulsion and 25-35% of the initiator for polymerization reaction to obtain a seed emulsion, and then dropping the remaining pre-emulsion and initiator into the seed emulsion for polymerization reaction to obtain the polyacrylate emulsion.

[0108] The 25-35% may be 28%, 30%, 32%, 34% and the like.

[0109] Preferably, the dropping time is 90-120 min, for example, 95 min, 100 min, 105 min, 110 min, 115 min, etc.

[0110] Preferably, after the remaining pre-emulsion and the initiator are added dropwise, the mixture is kept warm for 120 minutes to obtain the polyacrylate emulsion.

[0111] In the embodiment of the present disclosure, the polyacrylate emulsion may be a core-shell structure, so that the fluorine-containing atoms are concentrated in the shell layer, thereby enhancing the amphiphobic property and reducing the amount of organic fluorine monomer used, thereby lowering the cost.

[0112] In an embodiment of the present disclosure, the preparation method comprises the following steps:

[0113] (1) dissolving an emulsifier in a solvent, stirring to obtain an emulsifier solution, then adding a functional monomer and a base monomer, and performing a pre-emulsification reaction under stirring for 20-30 minutes to obtain a pre-emulsion;

[0114] (2) Mix 25-35% of the pre-emulsion and 25-35% of the initiator under a protective atmosphere, heat to 78-85° C. for polymerization to obtain a seed emulsion, and after the emulsion exhibits blue light, slowly and uniformly add the remaining pre-emulsion and initiator to the seed emulsion for polymerization, respectively, for 90-120 min, keep warm for 120 min, filter, and obtain the polyacrylate emulsion.

[0115] In the preparation method provided in the embodiment of the present disclosure, the reaction rate and the heat release rate can be controlled by utilizing the pre-emulsification process and the semi-continuous emulsion polymerization preparation method, so that the finally obtained polyacrylate emulsion polymer protective material can remain non-stratified for a long time and has strong stability, and can be widely used in industrial production.

[0116] The disclosed embodiments also provide an application of a polyacrylate emulsion in the waterproofing, oil-proofing, and corrosion-proofing of fabrics, fibers, fabrics, leather, non-woven fabrics, paper, construction, aerospace, and electronic protective coatings, preferably in the waterproofing and oil-proofing of fabrics.

[0117] The fabrics, fibers, fabrics, leathers, non-woven fabrics, etc. treated with the polyacrylate emulsion provided by the embodiments of the present disclosure exhibit excellent hydrophobic and oleophobic properties, and maintain good softness and air permeability.

[0118] Surface sizing of paper: The surface properties of paper treated with the polyacrylate emulsion provided by the embodiments of the present disclosure are improved, and it is not easily contaminated by water and other oil stains, and the original softness, air permeability, strength, color and printing performance of the paper can be maintained.

[0119] Adhesives for building surfaces: The installation of patches on building surfaces is the key to building design. The adhesive material will directly determine the waterproofness and quality of the patches after pasting. The polyacrylate emulsion provided in the embodiments of the present disclosure can improve the bonding strength and waterproof performance between the base layer and the patches.

[0120] Anti-icing materials for aerospace: Ice on the surface of aerospace equipment can cause significant harm and safety hazards. The polyacrylate emulsion provided in the embodiments of the present disclosure is applied to the surface of aerospace equipment to allow cold water to fall off automatically before freezing. After ice is formed, the interaction between ice and the interface can be weakened, making the ice layer easy to remove.

[0121] Anti-corrosion of electronic protective coating: The polyacrylate emulsion provided in the embodiments of the present disclosure can prevent electronic components from being damaged in humid, corrosive environments, as well as from the impact of various chemicals, dust, high and low temperature and other harsh environments. It can be applied to mobile phones, tablet computers, car central control, various external display screens, etc.

[0122] The embodiment of the present disclosure also provides a method for finishing fabrics using polyacrylate emulsion, the method comprising: finishing the fabrics using the polyacrylate emulsion and then drying them.

[0123] The polyacrylate emulsion provided in the embodiments of the present disclosure has the advantages of being safe, stable, and pollution-free, and in particular will not pollute containers when finishing or washing fabrics.

[0124] In the embodiment of the present disclosure, the finishing method includes dipping and spraying.

[0125] In the embodiment of the present disclosure, the finishing time is 0.5-1 h, such as 0.6 h, 0.7 h, 0.8 h, 0.9 h, etc., so that the polyacrylate emulsion can completely fill the surface of the fabric.

[0126] In the disclosed embodiment, the drying temperature is above 120°C, for example, 140°C, 160°C, 180°C, 200°C, etc., more preferably 150°C.

[0127] In the embodiment of the present disclosure, the drying time is 5-15 minutes, for example, 6 minutes, 8 minutes, 10 minutes, 12 minutes, 14 minutes, etc.

[0128] The disclosed embodiments also provide the use of polyacrylate emulsion in clothing care and washing.

[0129] The embodiments of the present disclosure also provide a use of a polyacrylate emulsion in a washing device, preferably in a clothing care module of the washing device.

[0130] In the current clothing washing, people not only pursue clean clothes, but also tend to diversify. Therefore, the polyacrylate emulsion provided in the present disclosure can be introduced into the clothing washing device as a functional module. The functional module can introduce aromatherapy, dyeing or color protection, etc., and in the present disclosure, a waterproof and oil-proof care module can be introduced. This module method enables the washing machine to maintain the original device without adding additional devices, and can simply and efficiently achieve functions such as waterproof and oil-proof, and the operation is simple and convenient.

[0131] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0132] Example 1

[0133] This embodiment provides a polyacrylate emulsion, which comprises 33% of an acrylic polymer, 3% of an emulsifier, 18% of an organic solvent and the remainder of water, based on the total mass of the polyacrylate emulsion being 100%, wherein the emulsifier is a mixture of hexadecyltrimethylammonium bromide and octylphenol polyoxyethylene ether in a mass ratio of 1:1, and the organic solvent is acetone;

[0134] This embodiment also provides a method for preparing the polyacrylate emulsion, which includes 20% organic fluorine monomer, 5% organic silicon monomer, 15% alkyl acrylate, 36% soft monomer and 24% hard monomer, based on the total mass of the reactive monomers of the acrylic polymer as 100%;

[0135] The organic fluorine monomer is tridecafluorooctyl acrylate, the organic silicon monomer is vinyl trimethoxysilane, the alkyl acrylate is octadecyl methacrylate, the soft monomer is butyl acrylate, and the hard monomer is methyl methacrylate;

[0136] Based on the total mass of the obtained polyacrylate emulsion being 100%, the amount of the initiator used is 1%, and the initiator is ammonium persulfate;

[0137] The schematic diagram of the preparation method is as follows Figure 1 As shown, the following steps are included:

[0138] (1) uniformly dispersing the emulsifier in the solvent, stirring the mixture with a magnetic stirrer at a certain speed until the mixture is completely dissolved, thereby obtaining an emulsifier solution, and then adding each reaction monomer, and performing a pre-emulsification reaction for 25 minutes at a high shear rate using an emulsifier to obtain a pre-emulsion;

[0139] (2) Add 35% of the pre-emulsion into a stirring apparatus, a reflux device, and a N 2 In a four-necked flask with a protective device, add 35% initiator and mix under N2 The temperature was raised to 80° C. in an atmosphere to carry out polymerization reaction to obtain a seed emulsion. After the emulsion showed blue light, the remaining pre-emulsion and initiator were slowly and uniformly added dropwise to a four-necked flask for polymerization reaction. The dropping time was 100 min. After the dropping was completed, the temperature was kept for 120 min. The polyacrylate emulsion was filtered through a sieve to obtain the polyacrylate emulsion.

[0140] Example 2

[0141] This embodiment provides a polyacrylate emulsion, which comprises 40% of an acrylic polymer, 5% of an emulsifier, 20% of an organic solvent and the remainder of water, based on the total mass of the polyacrylate emulsion being 100%, wherein the emulsifier is a mixture of octadecyltrimethylammonium bromide and fatty alcohol polyoxyethylene ether in a mass ratio of 3:1, and the organic solvent is ethanol;

[0142] This embodiment also provides a method for preparing the polyacrylate emulsion, which includes 24% organic fluorine monomer, 3% organic silicon monomer, 12% alkyl acrylate, 40% soft monomer and 21% hard monomer, based on the total mass of the reactive monomers of the acrylic polymer as 100%;

[0143] The organic fluorine monomer is dodecafluoroheptyl acrylate, the organic silicon monomer is vinyl triethoxysilane, the alkyl acrylate is hexadecyl acrylate, the soft monomer is n-butyl acrylate, and the hard monomer is styrene;

[0144] Based on the total mass of the obtained polyacrylate emulsion being 100%, the amount of the initiator used is 3%, and the initiator is potassium persulfate;

[0145] The preparation method comprises the following steps:

[0146] (1) uniformly dispersing the emulsifier in the solvent, stirring the mixture with a magnetic stirrer at a certain speed until the mixture is completely dissolved, thereby obtaining an emulsifier solution, and then adding each reaction monomer, and performing a pre-emulsification reaction for 20 minutes at a high shear rate using an emulsifier to obtain a pre-emulsion;

[0147] (2) Add 25% of the pre-emulsion into a stirring apparatus, a reflux device, and a N 2 In a four-necked flask with a protective device, add 25% initiator and mix under N 2 The temperature was raised to 85° C. in an atmosphere to carry out polymerization reaction to obtain a seed emulsion. After the emulsion showed blue light, the remaining pre-emulsion and initiator were slowly and uniformly added dropwise to a four-necked flask for polymerization reaction. The dropping time was 90 min. After the dropping was completed, the temperature was kept for 120 min. The polyacrylate emulsion was filtered through a sieve to obtain the polyacrylate emulsion.

[0148] Example 3

[0149] This embodiment provides a polyacrylate emulsion, which comprises 30% of an acrylic polymer, 1% of an emulsifier, 15% of an organic solvent and the remainder of water, based on the total mass of the polyacrylate emulsion being 100%, wherein the emulsifier is a mixture of octadecyltrimethylammonium chloride and octylphenol polyoxyethylene ether in a mass ratio of 1:3, and the organic solvent is tripropylene glycol;

[0150] This embodiment also provides a method for preparing the polyacrylate emulsion, which includes 18% organic fluorine monomer, 2% organic silicon monomer, 20% alkyl acrylate, 30% soft monomer and 30% hard monomer, based on the total mass of the reactive monomers of the acrylic polymer as 100%;

[0151] The organic fluorine monomer is dodecafluoroheptyl methacrylate, the organic silicon monomer is vinyl triethoxysilane, the alkyl acrylate is octadecyl acrylate, the soft monomer is n-butyl acrylate, and the hard monomer is acrylonitrile;

[0152] Based on the total mass of the obtained polyacrylate emulsion being 100%, the amount of the initiator used is 0.5%, and the initiator is azobisisobutylamidine hydrochloride;

[0153] The preparation method comprises the following steps:

[0154] (1) uniformly dispersing the emulsifier in the solvent, stirring the mixture with a magnetic stirrer at a certain speed until the mixture is completely dissolved, thereby obtaining an emulsifier solution, and then adding each reaction monomer, and performing a pre-emulsification reaction for 30 minutes at a high shear rate using an emulsifier to obtain a pre-emulsion;

[0155] (2) Add 30% of the pre-emulsion into a stirring device, a reflux device, and a N 2 In a four-necked flask with a protective device, add 30% initiator and mix under N 2 The temperature was raised to 78° C. in an atmosphere to carry out polymerization reaction to obtain a seed emulsion. After the emulsion showed blue light, the remaining pre-emulsion and initiator were slowly and uniformly added dropwise into a four-necked flask for polymerization reaction. The dropping time was 120 min. After the dropping was completed, the temperature was kept for 120 min. The polyacrylate emulsion was filtered through a sieve to obtain the polyacrylate emulsion.

[0156] Example 4

[0157] This embodiment provides a polyacrylate emulsion and a preparation method thereof, which is different from Embodiment 1 in that the organic fluorine monomer is replaced by hexafluorobutyl methacrylate.

[0158] Example 5

[0159] This embodiment provides a polyacrylate emulsion and a preparation method thereof, which is different from Embodiment 1 in that the soft monomer is replaced by lauryl acrylate.

[0160] Example 6

[0161] This embodiment provides a polyacrylate emulsion and a preparation method thereof, which is different from Embodiment 1 in that the emulsifier is replaced by hexadecyltrimethylammonium bromide.

[0162] Comparative Example 1

[0163] This comparative example provides a polyacrylate emulsion and a preparation method thereof, which differs from Example 1 in that, based on the total mass of the reactive monomers of the acrylic polymer being 100%, the amount of the organic fluorine monomer used is 17% and the amount of the organic silicon monomer used is 8%.

[0164] Comparative Example 2

[0165] This comparative example provides a polyacrylate emulsion and a preparation method thereof, which is different from Example 1 in that the alkyl acrylate octadecyl methacrylate is replaced by methyl acrylate.

[0166] Comparative Example 3

[0167] This comparative example provides a polyacrylate emulsion and a preparation method thereof, which differs from Example 1 in that, based on the total mass of the reactive monomers of the acrylic polymer being 100%, the emulsion includes 35% of an organic fluorine monomer, 5% of an organic silicone monomer, 20% of an alkyl acrylate, 20% of a soft monomer and 20% of a hard monomer.

[0168] Comparative Examples 4-5

[0169] This comparative example provides a polyacrylate emulsion and a preparation method thereof, which differs from Example 1 in that the soft monomer usage is 24% and the hard monomer usage is 36% (Comparative Example 4) and the soft monomer usage is 48% and the hard monomer usage is 12% (Comparative Example 5).

[0170] Comparative Example 6

[0171] This comparative example provides a polyacrylate emulsion and a preparation method thereof. The difference from Example 1 is that in step (2) of the preparation method, the pre-emulsion is added to a stirring device, a reflux device, and a N 2 In a four-necked flask with a protective device, add the initiator and mix under N 2 The temperature was raised to 80° C. under an atmosphere to carry out polymerization reaction for 150 min, and filtered through a sieve to obtain the polyacrylate emulsion.

[0172] Performance Test 1

[0173] The polyacrylate emulsions obtained in Examples 1-6 and Comparative Examples 1-6 were tested for water contact angle and oil contact angle. The test method was as follows: deionized water and edible oil were used as test liquids, respectively, the test liquid volume was 5 μL, the test temperature was 25° C. During the measurement, the sample fabric was attached to a glass slide and placed flat on a sample table. After the syringe was filled with liquid, the workbench with the syringe was slowly lowered so that the liquid on the syringe touched the sample fabric, and then gradually moved onto the workbench so that the liquid remained on the surface of the sample fabric. A single photo was taken, and finally fitting was performed. Each sample was measured five times and the average value was taken. The results are shown in Table 1:

[0174] Table 1

[0175]

[0176]

[0177] As shown in Table 1, the cationic polyacrylate emulsions prepared in Examples 1-3, 5, and 6 of the present disclosure have a water contact angle greater than 140° and an oil contact angle greater than 120°, and have excellent water and oil repellency. However, Example 4 uses the organic fluorine monomer hexafluorobutyl methacrylate (C3), which greatly reduces the water and oil repellency. From the comparison between Example 1 and Comparative Examples 1-6, it can be seen that when the amount of silicone monomer in Comparative Example 1 exceeds 5%, the gel rate of the emulsion may be increased, affecting the waterproof and oil-proof effect of the emulsion; in Comparative Example 2, octadecyl methacrylate is replaced with methyl acrylate to shorten the length of the alkyl chain, and the waterproof and oil-proof effect of the obtained emulsion is reduced; in Comparative Example 3, the content of organic fluorine monomer is too high, but the uncoordinated ratio of soft and hard monomers may reduce the polymerization rate and monomer conversion rate, thereby resulting in a decrease in the waterproof and oil-proof effect; in Comparative Examples 4-5, changing the ratio of soft and hard monomers will have a certain impact on the emulsion polymerization, and the waterproof and oil-proof performance will be reduced to a certain extent; in Comparative Example 6, not adopting a semi-continuous polymerization method will affect the stability and uniformity of the polymerization reaction, thereby resulting in a deterioration of the waterproof and oil-proof performance, while semi-continuous emulsion polymerization has good flexibility and can flexibly control and adjust the polymerization reaction process.

[0178] Application Examples 1-6 and Comparative Application Examples 1-6

[0179] The polyacrylate emulsions obtained in Examples 1-6 and Comparative Examples 1-6 are used to finish fabrics, comprising the following steps:

[0180] The fabrics were immersed in the polyacrylate emulsions obtained in Examples 1-6 and Comparative Examples 1-6 for 1 hour, and then placed in a drying machine at 150° C. for 10 minutes for drying to obtain fabrics finished with polyacrylate emulsions.

[0181] Comparative Application Example 7

[0182] The polyacrylate emulsion obtained in Example 1 is used to finish the fabric, comprising the following steps:

[0183] The fabric was immersed in the polyacrylate emulsion obtained in Example 1 for 1 hour, and then placed in a drying machine at 100° C. for 10 minutes for drying to obtain a fabric finished with the polyacrylate emulsion.

[0184] Performance Test 2

[0185] The fabrics treated with polyacrylate emulsions obtained in Application Examples 1-6 and Comparative Application Examples 1-7 and the untreated fabrics (blank control examples) were tested for softness, air permeability, washability, corrosion resistance, antistatic properties, friction resistance, etc. The test method is as follows:

[0186] The softness test is carried out in accordance with GB / T18318.1-2009 "Determination of the bending properties of textiles Part 1: Inclined plane method": a rectangular sample is placed on a horizontal platform with the long axis of the sample parallel to the long axis of the platform. The sample is pushed along the long axis of the platform so that it extends out of the platform and bends under its own weight. The end of the extended part is suspended in the air, and the other part of the sample that is still on the platform is pressed down by a ruler. When the head end of the sample passes through the front edge of the platform and reaches the inclined plane with an angle of 41.5° to the horizontal line, the extended length is equal to twice the bending length of the sample, from which the bending length can be calculated.

[0187] The air permeability test is carried out in accordance with GB / T5453-1997 "Determination of air permeability of textile fabrics": under the specified pressure difference conditions, the air flow rate vertically passing through a given area of ​​the sample within a certain period of time is measured, and the air permeability is calculated. The air flow rate can be measured directly or converted by measuring the pressure difference on both sides of the flow aperture.

[0188] Washing fastness was tested according to method 1A in AATCC 61-2010 "Washing Fastness Color: Quick Method": the samples were washed in a washing fastness tester, each wash lasted 45 minutes, which is equivalent to 5 home washes. After washing, the samples were taken out, rinsed thoroughly with water, and after drying, the contact angle was tested and recorded.

[0189] The friction resistance experiment was carried out in accordance with the standard GB / T3920-2008 "Textiles - Colour Fastness - Tests for Colour Fastness to Friction": first take a cotton fabric lining of appropriate size and the cut cotton fabric sample, place it horizontally on the Y571B dyeing friction fastness tester, tighten the two ends to prevent it from loosening, fix the cotton friction cloth on the pressure head, set different friction times, turn on the instrument, and make the friction pressure head continuously circulate and rub on the surface of the fabric sample. After the cyclic friction, test its contact angle and record it.

[0190] The results are shown in Table 2:

[0191] Table 2

[0192]

[0193] As can be seen from Table 2, the softness of the fabric treated with the polyacrylate emulsion prepared by the present invention is reduced by about 20% at most and only 10% at least; the air permeability is reduced by less than 14%, and the washing fastness can reach that the water contact angle of the fabric is basically maintained above 120° after washing 15 times, and the oil contact angle is basically maintained above 110°; the friction resistance can reach that the water contact angle of the fabric is basically maintained above 120° after rubbing 800 times, and the oil contact angle is basically maintained above 100°.

[0194] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0195] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polyacrylate emulsion, characterized in that: The components of the polyacrylate emulsion include acrylic polymer, emulsifier and solvent; The reactive monomers of the acrylic ester polymer include functional monomers and basic monomers, the functional monomers include alkyl acrylate, organic fluorine monomers and organic silicon monomers, and the basic monomers include soft monomers and hard monomers.

2. The polyacrylate emulsion according to claim 1, characterized in that In the reaction monomers, the mass ratio of the base monomer to the functional monomer is (1-2):1, preferably 1.5:1; and / or, the mass of the soft monomer is 50-70% of the total mass of the base monomer; And / or, based on the total mass of the reactive monomers as 100%, the organic fluorine monomer content is 16-24%, the organic silicon monomer content is 1-5%, the alkyl acrylate content is 10-20%, the soft monomer content is 30-40% and the hard monomer content is 20-30%.

3. The polyacrylate emulsion according to claim 1 or 2, characterized in that: The alkyl acrylate is selected from any one of hexadecyl acrylate, octadecyl acrylate, octadecyl methacrylate or lauryl methacrylate, or a combination of at least two thereof; And / or, the organic fluorine monomer is selected from any one or a combination of at least two of tridecafluorooctyl acrylate, dodecafluoroheptyl acrylate, dodecafluoroheptyl methacrylate or hexafluorobutyl methacrylate; and / or, the organosilicon monomer is selected from vinyltrimethoxysilane and / or vinyltriethoxysilane; And / or, the soft monomer is selected from any one or a combination of at least two of butyl acrylate, n-butyl acrylate or lauryl acrylate; And / or, the hard monomer is selected from any one or a combination of at least two of methyl methacrylate, styrene or acrylonitrile.

4. The polyacrylate emulsion according to any one of claims 1 to 3, characterized in that Based on the total mass of the polyacrylate emulsion being 100%, the content of the acrylic polymer is 30-40%, preferably 33%; And / or, based on the total mass of the polyacrylate emulsion being 100%, the content of the emulsifier is 1-5%, preferably 3%; And / or, the emulsifier is selected from cationic emulsifiers and / or nonionic emulsifiers, preferably a combination of cationic emulsifiers and nonionic emulsifiers, more preferably, the mass ratio of cationic emulsifiers and nonionic emulsifiers is (1-3):(1-3), preferably, the cationic emulsifier is selected from any one or a combination of at least two of hexadecyltrimethylammonium bromide, octadecyltrimethylammonium bromide, octadecyltrimethylammonium chloride, and the nonionic emulsifier is preferably selected from octylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

5. The polyacrylate emulsion according to any one of claims 1 to 4, characterized in that The solvent includes an organic solvent and water; Preferably, based on the total mass of the polyacrylate emulsion being 100%, the content of the organic solvent is 15-20%, more preferably 18%; Preferably, the organic solvent is selected from any one of acetone, ethanol or tripropylene glycol, or a combination of at least two thereof.

6. The method for preparing the polyacrylate emulsion according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: (1) dissolving an emulsifier, a functional monomer and a basic monomer in a solvent for pre-emulsification reaction to obtain a pre-emulsion; (2) adding an initiator to the pre-emulsion under a protective atmosphere to carry out a polymerization reaction to obtain the polyacrylate emulsion.

7. The preparation method according to claim 6, characterized in that: The pre-emulsification reaction time in step (1) is 20-30 min; And / or, based on the total mass of the functional monomer and the basic monomer being 100%, the amount of the initiator used in step (2) is 0.5-3% of the total mass of the functional monomer and the basic monomer; And / or, the polymerization reaction temperature in step (2) is 78-85° C., and the polymerization reaction time is 100-150 min; And / or, the initiator in step (2) is selected from any one of ammonium persulfate, potassium persulfate or azobisisobutylamidine hydrochloride, or a combination of at least two thereof.

8. The preparation method according to claim 6 or 7, characterized in that: The polymerization reaction in step (2) comprises the following steps: mixing 25-35% of the pre-emulsion and 25-35% of the initiator to carry out a polymerization reaction to obtain a seed emulsion, and then dripping the remaining pre-emulsion and the initiator into the seed emulsion to carry out a polymerization reaction to obtain the polyacrylate emulsion; Preferably, the dropping time is 90-120 min.

9. Use of the polyacrylate emulsion according to any one of claims 1 to 5 in the waterproofing, oil-proofing and corrosion-proofing of fabrics, fibers, fabrics, leather, non-woven fabrics, paper, construction, aerospace, and electronic protective coatings, preferably in the waterproofing and oil-proofing of fabrics.

10. A method for finishing fabrics using the polyacrylate emulsion according to any one of claims 1 to 5, characterized in that: The method comprises: finishing the fabric with the polyacrylate emulsion and then drying it; Preferably, the finishing method comprises dipping or spraying; Preferably, the finishing time is 0.5-1h; Preferably, the drying temperature is above 120°C, more preferably 150°C; Preferably, the drying time is 5-15 minutes.

11. Use of the polyacrylate emulsion according to any one of claims 1 to 5 in clothing care and washing.

12. Use of the polyacrylate emulsion according to any one of claims 1 to 5 in a washing device, preferably in a clothing care module of a washing device.

Images