WO2019205011A1 - 水性吸波涂料及其制备方法和应用 - Google Patents

水性吸波涂料及其制备方法和应用 Download PDF

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Publication number
WO2019205011A1
WO2019205011A1 PCT/CN2018/084421 CN2018084421W WO2019205011A1 WO 2019205011 A1 WO2019205011 A1 WO 2019205011A1 CN 2018084421 W CN2018084421 W CN 2018084421W WO 2019205011 A1 WO2019205011 A1 WO 2019205011A1
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Prior art keywords
aqueous
absorbing coating
water
powder
absorbing
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PCT/CN2018/084421
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English (en)
French (fr)
Inventor
李立星
王玉龙
陈渭涛
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深圳鹏汇功能材料有限公司
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Priority to CN201880000332.6A priority Critical patent/CN108699378A/zh
Priority to PCT/CN2018/084421 priority patent/WO2019205011A1/zh
Publication of WO2019205011A1 publication Critical patent/WO2019205011A1/zh

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32Radiation-absorbing paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20Diluents or solvents
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/01Magnetic additives

Definitions

  • the invention belongs to the technical field of coatings, and in particular relates to an aqueous absorbing coating, a preparation method and application thereof.
  • Absorbing paint is one of the military stealth coatings. Its use makes the over-the-horizon attack and the invisible battle become reality, which makes the modern combat mode change, thus having great military benefits.
  • the application in civilian products is also very extensive, such as electromagnetic radiation protection of radio and television transmitting stations, electromagnetic interference of microwave darkroom elimination equipment and communication and navigation systems, security information security, electromagnetic protection of industrial science and medical equipment, for some
  • the outer surface of the key military engineering and confidential engineering is coated with absorbing coating, which ensures the safety of these buildings and shields the electromagnetic radiation.
  • the electromagnetic wave absorbing agent in the coating acts as a absorbing wave.
  • the absorbing agent in the prior art mainly includes a ferrite absorbing material, a carbon fiber absorbing material, and a nano absorbing wave. Materials, chiral absorbing materials, polycrystalline iron fiber absorbing materials and conductive high polymer absorbing materials. Based on these absorbing agents, there are mainly the following types of absorbing coatings at home and abroad:
  • Ferrite absorbing coatings ferrite is the earliest mature absorbing material, mainly nickel-zinc ferrite, Mn-Zn ferrite and lanthanide ferrite. Its absorbing mechanism is magnetic Domain natural resonance.
  • the ferrite is divided into a spinel type, a garnet type and a magnetoplumbite type. Among them, the hexagonal crystal sheet magnetoplumbite type has the best absorbing property, and the hexagonal crystal sheet magnetite type ferrite is used. It has a high magnetic anisotropy equivalent field, and its natural resonance frequency is high, showing excellent high frequency absorbing properties.
  • the advantages are strong absorption, wide frequency band and low cost; the disadvantages are high density and poor high temperature characteristics.
  • Conductive high polymer absorbing material absorbing coating which is prepared by blending conductive fibers with a conventional powder absorbent, and has the advantages of: low density, molecular design, diversified structure, and infrared achievable It is compatible with microwave and easy to process, which can greatly improve the absorbing properties of materials.
  • this type of absorbing coating has the disadvantage of a narrow band, especially in the low frequency band.
  • Nano absorbing coatings are those in which nanoparticles are used in coatings to obtain certain special functions.
  • nano-coatings are improved in terms of conventional mechanical properties such as adhesion, impact resistance and flexibility.
  • nano-coatings may also exhibit certain special features such as self-cleaning, anti-static, stealth absorbing, and flame retardant properties.
  • the object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide an aqueous absorbing coating and a preparation method thereof, which are capable of solving the problem that the existing absorbing coating has low absorption rate, narrow frequency band and large coating thickness.
  • Technical problems such as shedding.
  • an aqueous absorbing coating comprises the following components by weight:
  • a method of making an aqueous absorbing coating comprises the following steps:
  • each of the components weighed is subjected to a mixing treatment.
  • a method of applying the aqueous absorbing coating of the invention is provided.
  • the water-based absorbing coating of the present invention constitutes a film-forming base system by the water-soluble acrylic copolymer and the water-soluble binder contained therein, so that the water-absorbing absorbing paint film is full and resistant. Grinding, has good water resistance, good chemical resistance, fast drying speed, easy to use, and gives the coating excellent flexibility, ensuring the stability of the coating, and the electromagnetic wave absorption effect of the coating is good.
  • the ferromagnetic absorbing powder absorbing agent can uniformly disperse and form in the aqueous absorbing coating in synergy with components such as the dispersing agent, the wetting agent and the thickening agent, and the pH adjusting agent.
  • the dispersion system is stable and has a high solid content.
  • water is used as the main solvent, which is safe and environmentally friendly.
  • the preparation method of the aqueous absorbing coating of the present invention through the preparation process thereof, makes the components uniformly dispersed to form a stable dispersion system.
  • the preparation method has the controllable process conditions, can ensure the stable performance of the prepared water-absorbing absorbing coating, and effectively reduces the production cost thereof, and is suitable for industrial production.
  • the weight of each component mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also the proportional relationship between the weights of the components, and therefore, as long as it is implemented according to the present invention.
  • the content of each component in the specification is enlarged or reduced in proportion to the scope disclosed in the specification of the embodiment of the present invention.
  • the weights described in the description of the embodiments of the present invention may be weight units well known in the chemical arts such as
  • an embodiment of the invention provides an aqueous absorbing coating.
  • the aqueous absorbing coating comprises the following weight percentage components:
  • the aqueous absorbing coating is used as a main solvent, non-toxic and non-irritating odor, harmless to the human body, and does not pollute the environment.
  • the water-soluble acrylic copolymer and the water-soluble adhesive constitute a film-forming base system, so that the water-absorbing absorbing paint film is full, wear-resistant, has good water resistance, good chemical resistance, and fast drying speed. It is easy to use and gives the coating excellent flexibility, ensuring the stability of the coating, and the electromagnetic wave absorption effect of the coating is good.
  • the water-soluble acrylic copolymer comprises one or a mixture of an aqueous polyurethane and an acrylic copolymer dispersion, an anionic aqueous polyurethane, an aqueous polyurethane dispersion.
  • the aqueous polyurethane and acrylic copolymer dispersion may be, but not limited to, LAMBERTI waterborne polyurethane.
  • Anionic waterborne polyurethanes can be used, but not exclusively, with ALLNEX anionic aqueous polyurethanes.
  • the aqueous polyurethane dispersion can be, but is not limited to, an ARKEMA aqueous polyurethane dispersion.
  • the water-soluble acrylic copolymers are synergistic with polyvinyl alcohol to impart excellent water resistance to the formed coating, good toughness of the film, and good adhesion.
  • the water-soluble acrylic copolymer may be 35%, 38%, 40%, 42%, 44%, 45%, 48%, 50%, 52%, 54% by weight, 55% and so on.
  • the water soluble binder comprises polyvinyl alcohol.
  • the polyvinyl alcohol may be selected from a variety of models such as Japanese Kuraray PVA and Taiwan Changchun Polyvinyl Alcohol.
  • Japan Kuraray PVA may be PVA217
  • Taiwan Changchun polyvinyl alcohol may be BP-05, BP-17, and the like.
  • the polyvinyl alcohol can be made into a 15% solid water-soluble polyvinyl alcohol by a conventional water bath method.
  • the selected water-soluble binder can synergize with the water-soluble acrylic copolymer to impart shape
  • the resulting coating has water resistance, chemical resistance, and flexibility.
  • the water-soluble binder may be 3%, 3.3%, 3.5%, 3.8%, 4%, 4.3%, 4.5%, 4.8%, 5%, and the like.
  • the synergistic effect of the ferromagnetic absorbing powder absorbing agent in components such as the dispersing agent, the wetting agent and the thickening agent, and the pH adjusting agent can be in the aqueous absorbing coating and corresponding
  • the components of the film-forming base system are uniformly dispersed, and the resulting dispersion system is stable.
  • the aqueous dispersant comprises at least one of Deqian W-19, Dow X-100, and BYK-110.
  • the aqueous dispersant uniformly disperses the inorganic particles and a part of the organic components of the ferromagnetic absorbing powder absorbing agent with the aid of other auxiliaries, and prevents sedimentation and aggregation of the solid particles to form a stable dispersion. system.
  • the aqueous dispersant may be present in an amount of 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, and the like.
  • the aqueous wetting agent includes BYK-3400, Digo TEGO270, Guangzhou Guanzhi OS-14
  • the aqueous wetting agents are capable of rapidly wetting the components, particularly the ferromagnetic absorbing powder and the components of the film forming base system, reducing the surface tension of each component to promote leveling and to help prevent shrinkage.
  • the aqueous wetting agent may be 0.5%, 0.7%, 0.8%, 1%, 1.2% s 1.5% ⁇ 1.7% s 1.9% s 2%, and the like.
  • the aqueous thickener comprises at least one of Guangzhou Ames AMS-201, Rohm and Haas ASE-60, and Dow TT-935.
  • the aqueous thickener can act on the water component, adjust the viscous property of the solvent, and impart excellent fluidity and leveling property to the water absorbing coating, and effectively improve the shear viscosity of the water absorbing coating.
  • the aqueous thickener may be present in an amount of 0.5%, 0.7%, 0.8%, 1%, 1.2% ⁇ 1.5% ⁇ 1.7% s 1.9%, 2%, and the like.
  • the ferromagnetic absorbing powder constitutes a absorbing agent.
  • the ferromagnetic absorbing powder comprises nickel zinc ferrite powder, manganese zinc ferrite powder, iron silicon aluminum powder, iron nickel At least one of molybdenum powder, iron silicon chromium powder, and carbonyl iron powder.
  • the particle diameter of the ferromagnetic absorbing powder may be a particle diameter of a ferromagnetic absorbing powder commonly used in the art, such as 15 (Vm or less.
  • the absorbing agents have high magnetic permeability, high saturation magnetic induction, high It is characterized by resistance, low loss, etc., and can be uniformly dispersed.
  • the ferromagnetic absorbing powder is a ferromagnetic absorbing powder subjected to surface modification treatment by a coupling agent, preferably the coupling agent package The ferromagnetic absorbing powder is coated.
  • the coupling agent comprises a silane coupling agent, a silane coupling agent, and a titanic acid. At least one of an ester coupling agent, an aluminate coupling agent, and a zirconate coupling agent.
  • the coupling agent of the Chinese Academy of Sciences KH-450, Evonik Degussa UN3267, 1151, 2629, etc. can be selected.
  • the ferromagnetic absorbing powder or the surface of the ferromagnetic absorbing powder modified by a coupling agent may have a weight percentage of 35%, 36%, 37%, 38%, 39. %, 40%, 41%, 42%, 43%, 44%, 45%, etc.
  • the pH adjuster is one or a mixture of ammonia water, a methyl alcohol amine polymer.
  • the pH adjusters can effectively improve the pH of the solvent system, such as the carboxylic acid group in the neutralization system, so that the corresponding components can better achieve water solubility, improve the stability of the aqueous absorbing coating dispersion system, and improve storage stability. And construction.
  • the pH adjuster may be 0.1% by weight.
  • the antifoaming agent can inhibit the foaming and defoaming during the preparation, transportation and storage of the aqueous absorbing coating material or during the construction process, improve the stability of the aqueous absorbing coating, and improve the coating. Layer quality.
  • the aqueous antifoaming agent comprises at least one of BASF A38, Digo 810, and Clariant 544X.
  • the antifoaming agent may be present in an amount of 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, or the like.
  • the aqueous absorbing coating synergistically acts to form a uniformly dispersed and stable dispersion system having a high solid content while imparting a lacquer to the coating formed by the aqueous absorbing coating.
  • the film is full, wear-resistant, has good water resistance, good chemical resistance, fast drying speed, easy to use, and gives the coating excellent flexibility, ensures the stability of the coating, and the electromagnetic wave absorption effect of the coating is good.
  • the coating formed by the aqueous absorbing coating has an absorption peak of -26 dbB in the range of 0.2-18 GHz.
  • an embodiment of the present invention further provides a preparation method of the above aqueous absorbing coating.
  • the preparation method of the aqueous absorbing coating comprises the following steps:
  • Step SOI weighing each component according to the ratio of the components contained in the aqueous absorbing coating described above and the components;
  • Step S02 The components weighed in step S01 are subjected to a mixing treatment.
  • each component of the aqueous absorbing coating in the above step S01 are as described above. In order to save space, we will not repeat them here.
  • the coupling agent coats the ferromagnetic absorbing powder.
  • the ferromagnetic absorbing powder surface-modified by the coupling agent is prepared as follows:
  • the weighed ferromagnetic absorbing powder is first added to the aqueous solution of the coupling agent for mixing treatment and is heated at 85 ° C - 9 5 ° C, specifically at 95 ° C until the water is evaporated to obtain Coupling agent modified ferromagnetic absorbing powder
  • the mass ratio of the coupling agent to the ferromagnetic absorbing powder is 0.1%-5% e , that is, 1KG ferromagnetic absorbing powder is added with 5-10 g of an aqueous silane coupling agent.
  • the coupling agent may include at least one of a silane coupling agent, an epoxy coupling agent, a vinyl coupling agent, and an aqueous silane coupling agent as described above.
  • the mixing treatment in the above step S02 can be carried out in a conventional manner, such as stirring, sonication or the like, so that the components are uniformly dispersed.
  • the mixing process in the step S02 is to first add the water-soluble acrylic copolymer to the water mixing treatment, and then sequentially adjust the pH adjuster, the water-soluble adhesive, the absorbing powder, various Additives (aqueous dispersants, aqueous wetting agents, aqueous defoamers, aqueous thickeners) are compounded.
  • the compounding treatment may be a conventional mixing treatment such as stirring, ultrasonication, etc., as long as it is possible to uniformly mix the components, which are within the scope of the present invention.
  • the agitation mixing treatment is carried out at a medium speed of lOOOr/min. The mixing treatment in this order enables the components of the components to be dispersed and dissolved to form a stable dispersed slurry system.
  • the mixing process further includes a subsequent treatment process of the coating, such as filtering, blending and defoaming, and packaging treatment of the mixed slurry.
  • a subsequent treatment process of the coating such as filtering, blending and defoaming, and packaging treatment of the mixed slurry.
  • the filtration can be filtered by a 200 mesh filter after being uniformly stirred.
  • the preparation method of the aqueous absorbing coating material has a uniform dispersion of the components by a preparation process thereof to form a stable dispersion system.
  • the preparation method has easy controllable process conditions, can ensure stable performance of the prepared water absorbing coating, and effectively reduces the production cost thereof, and is suitable for industrial production.
  • the aqueous absorbing coating is a uniformly dispersed and stable dispersion system, and at the same time, the coating formed by the aqueous absorbing coating has a full film, abrasion resistance, good water resistance and resistance. Good chemical property, fast drying speed, easy to use, and excellent flexibility to the coating, ensuring the stability of the coating, and the electromagnetic wave absorption effect of the coating is good, thus effectively expanding the application field of the water absorbing coating.
  • the aqueous absorbing coating can be used in the preparation of a workpiece of any of plastic, resin, glass, ceramic, wood, and leather. Specifically, it is applied to a portion where the workpiece needs to be electromagnetically shielded.
  • the workpiece includes military radar, stealth aircraft, smart digital, kitchen appliances, wireless network card housing, mobile base station cabinet, medical instrument, ? Any of the , , and .
  • the aqueous absorbing coating may be coated on an inner surface or an outer surface such as a notebook computer case, a tablet computer case, a mobile phone case, a television housing, a wireless network card housing, a mobile base station box, or the like. Thereby, the electromagnetic wave absorption effect of the corresponding workpiece is improved.
  • This embodiment provides an aqueous absorbing coating and a preparation method thereof, which comprise the following components by weight:
  • the preparation method of the aqueous absorbing coating of the embodiment comprises the following steps:
  • This embodiment provides an aqueous absorbing coating and a preparation method thereof, comprising the following components by weight:
  • the preparation method of the aqueous absorbing coating of the embodiment comprises the following steps:
  • This embodiment provides an aqueous absorbing coating and a preparation method thereof, which comprise the following components by weight:
  • the preparation method of the aqueous absorbing coating of the embodiment comprises the following steps:
  • This embodiment provides an aqueous absorbing coating and a preparation method thereof, comprising the following components by weight:
  • This embodiment provides an aqueous electromagnetic shielding coating comprising the following components by weight:
  • This embodiment provides an aqueous electromagnetic shielding coating comprising the following components by weight: [0087] 7X20.7% ⁇ polyether modified silicone wetting agent 0.2%, sodium acrylate dispersant 0.5%, aqueous silicone defoamer 0.3%, water soluble polyurethane dispersion 36%, ammonia water 0.3%, nickel zinc Ferrite magnetic powder 42%.
  • the coatings formed by the aqueous absorbing coatings provided in the above respective examples and comparative examples were subjected to electromagnetic wave absorption experiments in which the maximum absorption peak in the range of 0.2-18 GHz was -26 dbB, and the remaining frequency bands exceeded -10 GHz, in combination with Table 1 It can be seen that the water-absorbing absorbing coating of the embodiment of the invention has strong coating adhesion, high hardness and electromagnetic wave absorption effect. In addition, it is also described that the aqueous absorbing coating dispersion system is uniform.

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Abstract

水性吸波涂料包括如下重量百分比的组分:水15%-25%、水性分散剂0.5%-1%、水性润湿剂0.5%-2%、水性消泡剂0.1%-0.5%、水性增稠剂0.5%-2%、铁磁性吸波粉35%-45%、水溶性丙烯酸共聚物35%-55%、水溶性粘接剂3%-5%、pH调节剂0.1%-1%。水性吸波涂料固含量高,分散体系稳定,形成的涂层附着力强,耐磨,电磁波吸收效果好。水性吸波涂料的制备方法工艺条件易控,能够保证制备的水性吸波涂料性能稳定。

Description

水性吸波涂料及其制备方法和应用
技术领域
[0001] 本发明属于涂料技术领域, 具体涉及一种水性吸波涂料及其制备方法和应用。
背景技术
[0002] 吸波涂料是军事上的隐身涂料之一, 它的使用使超视距攻击、 不见面的战斗成 为现实, 使得现代战斗模式得以改变, 由此具有巨大的军事效益。 此外, 在民 用产品上的应用也非常广泛, 如广播电视发射台的电磁辐射防护, 微波暗室消 除设备和通讯和导航系统的电磁干扰, 安全信息保密, 工业科学和医疗设备的 电磁防护, 对一些重点军事工程和保密工程的外表面涂上吸波涂料, 一方面保 证了这些建筑物的安全性, 另外对电磁波的辐射起到屏蔽作用。
[0003] 在吸波涂料中, 主要是涂料中的电磁波吸波剂起到吸波作用, 现有技术中的吸 波剂主要包括铁氧体吸波材料、 碳纤维结构吸波材料、 纳米吸波材料、 手性吸 波材料、 多晶铁纤维吸波材料和导电高聚物吸波材料等。 基于该些吸波剂, 目 前国内外吸波涂料主要有以下几种:
[0004] 铁氧体吸波涂料, 铁氧体是发展最早较为成熟的吸波材料, 主要有镍锌铁氧体 、 锰锌铁氧体和钡系铁氧体等, 其吸波机理是磁畴自然共振。 铁氧体分为尖晶 石型、 石榴石型和磁铅石型, 其中以六角晶系片状磁铅石型的吸波性能最好, 因六角晶系片状磁铅石型铁氧体具有较高的磁性各向异性等效场, 其自然共振 频率较高, 表现出优良的高频吸波性能。 其优点是吸收强、 频带较宽、 成本低 ; 缺点是密度大, 高温特性差。
[0005] 导电高聚物吸波材料吸波涂料, 该种涂料通过将导电纤维掺混于常规粉体吸收 剂制得, 其优点是: 密度小、 可分子设计、 结构多样化、 可实现红外和微波兼 容、 易复合加工, 可以较大幅度地提高材料的吸波性能。 但是, 该种吸波涂料 具有频带窄的缺点, 特别是在低频波段的吸波效果很差。
[0006] 纳米吸波涂料, 是将纳米粒子用于涂料中获得具有某些特殊功能的涂料。 一方 面纳米涂料在常规的力学性能如附着力、 抗冲击、 柔韧性方面会得到提高, 另 一方面有可能提高涂料的耐老化、 耐腐蚀、 抗辐射性能。 此外, 纳米涂料还可 能呈现出某些特殊功能, 如自清洁、 抗静电、 隐身吸波、 阻燃等性能。
[0007] 虽然目前出现了一些不同类型的吸波涂料, 但是现有的吸波涂料存在的主要有 以下几个需要改进的不足: 1.吸收率低, 2.频带窄, 3.涂层厚度大, 导致的每平 方米重量在 3~5千克以上不仅施工周期长, 而且因涂层厚, 容易开裂脱落, 涂料 柔韧性不够。 这些不足严重制约了目前吸波涂料的应用范围。
发明概述
技术问题
[0008] 本发明的目的在于克服现有技术的上述不足, 提供一种水性吸波涂料和其制备 方法, 以解决现有吸波涂料吸收率低、 频带窄和涂层厚度大导致的易开裂脱落 等技术问题。
问题的解决方案
技术解决方案
[0009] 为了实现上述发明目的, 本发明的一方面, 提供了一种水性吸波涂料。 所述水 性吸波涂料包括如下重量百分比的组分:
[0010] 水 15%-25%
[0011] 水性分散剂
Figure imgf000003_0001
[0012] 水性润湿剂 0.5%-2%
[0013] 水性消泡剂 0.1%-0.5%
[0014] 水性增稠剂 0.5%-2%
[0015] 铁磁性吸波粉 35%-45%
[0016] 水溶性丙烯酸共聚物 35%-55%
[0017] 水溶性粘接剂 3%-5%
[0018] pH调节剂
Figure imgf000003_0002
[0019] 本发明的另一方面, 提供了一种水性吸波涂料的制备方法。 所述水性吸波涂料 包括如下步骤:
[0020] 按照本发明水性吸波涂料所含组分和所述组分的比例称取各组分;
[0021] 将称取的各所述组分进行混料处理。 [0022] 本发明的再一方面, 提供了本发明水性吸波涂料的应用方法。 所述水性吸波涂 料在制备塑料、 树脂、 玻璃、 陶瓷、 木质、 皮革中的任一种材质工件中的应用 发明的有益效果
有益效果
[0023] 与现有技术相比, 本发明水性吸波涂料通过所含的水溶性丙烯酸共聚物和水溶 性粘接剂构成了成膜基础体系, 使得所述水性吸波涂料漆膜丰满, 耐磨, 具有 耐水性好, 耐化学性佳, 干燥速度快, 使用方便, 而且赋予涂层优异的柔韧性 , 保证了涂层的稳定性, 而且涂层电磁波吸收效果好。 所述铁磁性吸波粉吸波 剂在如所述分散剂、 所述润湿剂和增稠剂以及 pH调节剂等组分的协同作用, 能 够在所述水性吸波涂料均匀分散, 且形成的分散体系稳定, 固含量高。 另外, 采用水作为主体溶剂, 安全环保。
[0024] 本发明水性吸波涂料的制备方法通过其配制工艺, 使得各组分分散均匀, 以形 成稳定的分散体系。 另外, 其制备方法工艺条件易控, 能够保证制备的水性吸 波涂料性能稳定, 而且有效降低了其生产成本, 适于工业化生产。
发明实施例
本发明的实施方式
[0025] 为了使本发明要解决的技术问题、 技术方案及有益效果更加清楚明白, 以下结 合实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施 例仅仅用以解释本发明, 并不用于限定本发明。
[0026] 本发明实施例说明书中所提到的各组分的重量不仅仅可以指代各组分的具体含 量, 也可以表示各组分间重量的比例关系, 因此, 只要是按照本发明实施例说 明书各组分的含量按比例放大或缩小均在本发明实施例说明书公开的范围之内 。 具体地, 本发明实施例说明书中所述的重量可以是 |Jg、 mg、 g、 kg等化工领域 公知的重量单位。
[0027] 一方面, 本发明实施例提供一种水性吸波涂料。 所述水性吸波涂料包括如下重 量百分比的组分:
[0028] 水 15%-25% [0029] 水性分散剂 0.5%- 1 %
[0030] 水性润湿剂 0.5%-2%
[0031] 水性消泡剂 0.1%-0.5%
[0032] 水性增稠剂 0.5%-2%
[0033] 铁磁性吸波粉 35%-45%
[0034] 水溶性丙烯酸共聚物 35%-55%
[0035] 水溶性粘接剂 3%-5%
[0036] pH调节剂
Figure imgf000005_0001
[0037] 其中, 所述水性吸波涂料采用作为主体溶剂, 无毒无刺激气味, 对人体无害, 不污染环境。
[0038] 所述水溶性丙烯酸共聚物和水溶性粘接剂构成了成膜基础体系, 使得所述水性 吸波涂料漆膜丰满, 耐磨, 具有耐水性好, 耐化学性佳, 干燥速度快, 使用方 便, 而且赋予涂层优异的柔韧性, 保证了涂层的稳定性, 而且涂层电磁波吸收 效果好。
[0039] 在一实施例中, 所述水溶性丙烯酸共聚物包括水性聚氨酯和丙烯酸共聚分散体 、 阴离子水性聚氨酯、 水性聚氨酯分散体中的一种或两种混合物。 其中, 所述 水性聚氨酯和丙烯酸共聚分散体可以但不仅仅选用 LAMBERTI (宁柏迪) 水性 聚氨酯。 阴离子水性聚氨酯可以但不仅仅选用 ALLNEX (湛新) 阴离子水性聚 氨酯。 所述水性聚氨酯分散体可以但不仅仅选用 ARKEMA(阿科玛) 水性聚氨酯 分散体。 该些水溶性丙烯酸共聚物能够与聚乙烯醇协同作用, 赋予形成的涂层 具有优异的耐水性, 漆膜韧性佳, 附着力好。 在具体实施例中, 所述水溶性丙 烯酸共聚物的重量百分含量可以是 35%、 38%、 40%、 42%、 44%、 45%、 48%、 50%、 52%、 54%、 55%等。
[0040] 一实施例中, 所述水溶性粘接剂包括聚乙烯醇。 其中, 所述聚乙烯醇可以但不 仅仅选用日本可乐丽 PVA、 台湾长春聚乙烯醇等各种型号选取其中的一种型号 。 其中, 日本可乐丽 PVA可以是 PVA217, 台湾长春聚乙烯醇可以是 BP-05、 BP- 17等。 其中, 所述聚乙烯醇可以采用传统水浴方式熬制 15%固含的水溶性聚乙烯 醇。 所选用的水溶性粘接剂能够与所述水溶性丙烯酸共聚物协同作用, 赋予形 成的涂层具有耐水, 耐化学, 提高柔韧性等作用。 在具体实施例中, 所述水溶 性粘接剂的重量百分含量可以是 3%、 3.3%、 3.5%、 3.8%、 4%、 4.3%、 4.5%、 4. 8%、 5%等。
[0041] 所述铁磁性吸波粉吸波剂在如所述分散剂、 所述润湿剂和增稠剂以及 pH调节剂 等组分的协同作用能够在所述水性吸波涂料以及相应的成膜基础体系各组分均 匀分散, 且形成的分散体系稳定。
[0042] 其中, 一实施例中, 所述水性分散剂包括德谦 W- 19、 陶氏 X-100、 BYK-110中 的至少一种。 该些水性分散剂在其他助剂的协助下, 将所述铁磁性吸波粉吸波 剂的无机物颗粒和部分有机组分进行均匀分散, 同时防止固体颗粒的沉降和凝 聚, 形成稳定的分散体系。 在具体实施例中, 所述水性分散剂的重量百分含量 可以是 0.5%、 0.6%、 0.7%、 0.8%、 0.9%、 1%等。
[0043] 一实施例中, 所述水性润湿剂包括 BYK-3400、 迪高 TEGO270、 广州冠志 OS-14
00中的至少一种。 该些水性润湿剂能够快速润湿各组分, 特别是所述铁磁性吸 波粉和成膜基础体系各组分, 降低各组分表面张力促进流平并有助于防缩孔。 在具体实施例中, 所述水性润湿剂的重量百分含量可以是 0.5%、 0.7%、 0.8%、 1 %、 1.2% s 1.5% ^ 1.7% s 1.9% s 2%等。
[0044] 一实施例中, 所述水性增稠剂包括广州阿美斯 AMS-201、 罗门哈斯 ASE-60、 陶氏 TT-935中的至少一种。 该些水性增稠剂能够对水组分作用, 调节溶剂的粘 稠性能, 并赋予所述水性吸波涂料具有优异的流动性, 流平性, 有效提高所述 水性吸波涂料的剪切粘度。 在具体实施例中, 所述水性增稠剂的重量百分含量 可以是 0.5%、 0.7%、 0.8%、 1%、 1.2% ^ 1.5% ^ 1.7% s 1.9%、 2%等。
[0045] 所述铁磁性吸波粉构成了吸波剂, 一实施例中, 所述铁磁性吸波粉包括镍锌铁 氧体粉、 锰锌铁氧体粉、 铁硅铝粉、 铁镍钼粉、 铁硅铬粉、 羰基铁粉中的至少 一种。 另外, 所述铁磁性吸波粉的粒径为可以是本领域常用铁磁性吸波粉的粒 径, 如 15(Vm以下。 该些吸波剂具有高磁导率, 高饱和磁感应强度, 高电阻, 低 损耗等特点, 且能够均匀分散。 在进一步实施例中, 所述铁磁性吸波粉为经过 偶联剂表面改性处理的铁磁性吸波粉, 优选的是所述偶联剂包覆所述铁磁性吸 波粉。 在具体实施例中, 所述偶联剂包括硅烷类偶联剂、 硅烷类偶联剂、 钛酸 酯类偶联剂、 铝酸酯类偶联剂、 锆酸酯类偶联剂中的至少一种。 具体可以选用 中科院 KH-450、 赢创德固赛 UN3267、 1151、 2629等型号的偶联剂。 通过对所述 铁磁性吸波粉表面改性, 一方面增强了所述铁磁性吸波粉在所述水性吸波涂料 的分散均匀性, 同时增强了所述铁磁性吸波粉与成膜基础体系之间的结合强度 。 在具体实施例中, 所述铁磁性吸波粉或表面经偶联剂改性后的所述铁磁性吸 波粉的重量百分含量可以是 35%、 36%、 37%、 38%、 39%、 40%、 41%、 42%、 43%、 44%、 45%等。
[0046] 一实施例中, 所述 pH调节剂为氨水、 甲基醇胺类聚合物中的一种或两种混合物 。 该些 pH调节剂能够有效溶剂体系的酸碱度, 如中和体系中的羧酸基使相应的 组分更好的实现水溶性, 提高所述水性吸波涂料分散体系的稳定性, 改善储存 稳定性及施工性。 在具体实施例中, 所述 pH调节剂的重量百分含量可以是 0.1%
、 0.2% ^ 0.3% ^ 0.4%、 0.5%、 0.6%、 0.7%、 0.8%、 0.9%、 1%等。
[0047] 所述消泡剂能够对所述水性吸波涂料制备、 运输和储存过程中或在施工过程中 具有抑泡, 消泡的作用, 提高所述水性吸波涂料的稳定性, 提高涂层质量。 如 在一实施例中, 所述水性消泡剂包括巴斯夫 A38、 迪高 810、 科莱恩 544X中的至 少一种。 在具体实施例中, 所述消泡剂的重量百分含量可以是 0.1%、 0.2%、 0.3 %、 0.4%、 0.5%等。
[0048] 因此, 所述水性吸波涂料通过所含的各组分协同作用, 构成一均匀分散的且稳 定的分散体系, 固含量高, 同时赋予所述水性吸波涂料形成的涂层具有漆膜丰 满, 耐磨, 具有耐水性好, 耐化学性佳, 干燥速度快, 使用方便, 而且赋予涂 层优异的柔韧性, 保证了涂层的稳定性, 而且涂层电磁波吸收效果好, 如所述 水性吸波涂料形成的涂层在 0.2- 18GHZ频段范围内吸收峰达到 -26dbB。
[0049] 相应地, 本发明实施例还提供了上述水性吸波涂料的一种制备方法。 所述水性 吸波涂料的制备方法包括如下步骤:
[0050] 步骤 SOI : 按照上文所述的水性吸波涂料所含组分和所述组分的比例称取各组 分;
[0051] 步骤 S02: 将步骤 S01中称取的各组分进行混料处理。
[0052] 具体地, 上述步骤 S01中水性吸波涂料的各组分优选含量和种类如上文所述, 为了节约篇幅, 在此不再赘述。 其中, 当称取的镍锌铁氧体磁粉为经过偶联剂 表面改性处理的铁磁性吸波粉, 优选的是所述偶联剂包覆所述铁磁性吸波粉时 。 所述偶联剂表面改性处理的铁磁性吸波粉是按照如下方法制备获得:
[0053] 先将称取的铁磁性吸波粉加入至偶联剂的水溶液中进行混合处理并在于 85°C-9 5°C, 具体如 95°C下加热处理直至水分被蒸干, 获得偶联剂改性的铁磁性吸波粉
[0054] 其中, 所述偶联剂与所述铁磁性吸波粉混合质量比为 0.1%-5%e, 即 1KG铁磁性 吸波粉加入 5-10克水性硅烷偶联剂。 所述偶联剂如上文所述的可以包括硅烷类偶 联剂、 环氧类偶联剂、 乙烯基类偶联剂、 水性硅烷类偶联剂中的至少一种。
[0055] 上述骤 S02中的混料处理可以选用常规的方式进行处理, 如搅拌, 超声处理等 方式, 使得各组分分散均匀即可。
[0056] 在一实施例中, 所述步骤 S02中的混料处理是先将水溶性丙烯酸共聚物加入水 中混料处理, 然后依次 pH调节剂、 水溶性粘接剂、 吸波粉、 各种助剂 (水性分 散剂、 水性润湿剂、 水性消泡剂、 水性增稠剂) 进行混料处理。 其中, 每个混 料处理过程中, 混料处理可以是常规的混料处理, 如搅拌、 超声等, 只要是能 够使得各组分混合均匀, 均在本发明公开的范围。 当采用搅拌混料处理时, 所 述搅拌混料处理是采用中速 lOOOr/min搅拌。 按照该顺序进行混料处理, 能够使 得各组分成分分散和溶解, 从而形成稳定的分散浆料体系。
[0057] 待所述步骤 S02混料处理之后, 还包括涂料的后续处理工艺, 如对混料处理的 后的浆料进行过滤和调和消泡以及包装处理等。 其中, 过滤可以是搅拌均匀后 2 00目过滤网过滤。
[0058] 因此, 所述水性吸波涂料的制备方法通过其配制工艺, 使得各组分分散均匀, 以形成稳定的分散体系。 另外, 其制备方法工艺条件易控, 能够保证制备的水 性吸波涂料性能稳定, 而且有效降低了其生产成本, 适于工业化生产。
[0059] 正是由于上文所述水性吸波涂料为均匀分散的且稳定的分散体系, 同时赋予所 述水性吸波涂料形成的涂层具有漆膜丰满, 耐磨, 具有耐水性好, 耐化学性佳 , 干燥速度快, 使用方便, 而且赋予涂层优异的柔韧性, 保证了涂层的稳定性 , 而且涂层电磁波吸收效果好, 从而有效扩展了所述水性吸波涂料的应用领域 。 如在一实施例中, 所述水性吸波涂料可在制备塑料、 树脂、 玻璃、 陶瓷、 木 质、 皮革中的任一种材质工件中的应用。 具体的是将其涂敷在所述工件需要进 行电磁屏蔽的部位。 因此, 所述工件包括用于军用雷达、 隐形飞机、 智能数码 、 厨电产品、 无线网卡壳体、 移动基站箱体、 医疗仪器、 ? 、 、 中的任一种。 具体的可以将所述水性吸波涂料涂覆在如笔记本电脑壳体、 平板电脑壳体、 手 机壳体、 电视机壳体、 无线网卡壳体、 移动基站箱体等内表面或外表面上, 从 而提高相应工件对电磁波吸收效果。
[0060] 现以水性吸波涂料和制备方法为例, 对本发明进行进一步详细说明。
[0061] 实施例 1
[0062] 本实施例提供一种水性吸波涂料及其制备方法, 其包括如下重量份的组分:
[0063] 7X14.7% ^ 聚醚改性有机硅润湿剂 0.2%、 丙烯酸钠盐分散剂 0.5%、 水性有机硅 消泡剂 0.3%、 疏水改性丙烯酸缔合型增稠剂 3%、 水溶性聚氨酯分散体 36%、 聚 乙烯醇水溶液 3%、 氨水 0.3%、 镍锌铁氧体磁粉 42%。
[0064] 本实施例水性吸波涂料制备方法, 包括如下步骤:
[0065] S11.称量: 按本实施例 1中称量聚醚改性有机硅润湿剂、 丙烯酸钠盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯分散体、 聚 乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉等组分;
[0066] S12.制备浆料: 在匀速搅拌条件下, 依次将聚醚改性有机硅润湿剂、 丙烯酸钠 盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯 分散体、 聚乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉投入水中进行混料处理。
[0067] 实施例 2
[0068] 本实施例提供一种水性吸波涂料及其制备方法, 其包括如下重量份的组分:
[0069] 水 18%、 聚醚改性有机硅润湿剂 0.2%、 丙烯酸钠盐分散剂 0.5%、 水性有机硅消 泡剂 0.3%、 疏水改性丙烯酸缔合型增稠剂 3%、 水溶性聚氨酯分散体 32%、 聚乙 烯醇水溶液 2.5%、 氨水 0.3%、 镍锌铁氧体磁粉 43.2%。
[0070] 本实施例水性吸波涂料制备方法, 包括如下步骤:
[0071] S11.称量: 按本实施例 2中称量聚醚改性有机硅润湿剂、 丙烯酸钠盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯分散体、 聚 乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉等组分;
[0072] S12.制备浆料: 在匀速搅拌条件下, 依次将聚醚改性有机硅润湿剂、 丙烯酸钠 盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯 分散体、 聚乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉投入水中进行混料处理。
[0073] 实施例 3
[0074] 本实施例提供一种水性吸波涂料及其制备方法, 其包括如下重量份的组分:
[0075] 水 16%、 聚醚改性有机硅润湿剂 0.2%、 丙烯酸钠盐分散剂 0.5%、 水性有机硅消 泡剂 0.3%、 疏水改性丙烯酸缔合型增稠剂 3%、 水溶性聚氨酯分散体 30%、 聚乙 烯醇水溶液 2.5%、 氨水 0.3%、 镍锌铁氧体磁粉 47.2%。
[0076] 本实施例水性吸波涂料制备方法, 包括如下步骤:
[0077] S11.称量: 按本实施例 3中称量聚醚改性有机硅润湿剂、 丙烯酸钠盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯分散体、 聚 乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉等组分;
[0078] S12.制备浆料: 在匀速搅拌条件下, 依次将聚醚改性有机硅润湿剂、 丙烯酸钠 盐分散剂、 水性有机硅消泡剂、 疏水改性丙烯酸缔合型增稠剂、 水溶性聚氨酯 分散体、 聚乙烯醇水溶液、 氨水、 镍锌铁氧体磁粉投入水中进行混料处理。
[0079] 实施例 4
[0080] 本实施例提供一种水性吸波涂料及其制备方法, 其包括如下重量份的组分:
[0081] 水 17%、 聚醚改性有机硅润湿剂 0.3%、 丙烯酸钠盐分散剂 0.6%、 水性有机硅消 泡剂 0.05%、 疏水改性丙烯酸缔合型增稠剂 4.5%、 水溶性聚氨酯分散体 32%、 聚 乙烯醇水溶液 2.0%、 氨水 0.2%、 镍锌铁氧体磁粉 43.35%。
[0082] 对比例 1
[0083] 本实施例提供一种水性电磁屏蔽涂料, 其包括如下重量份的组分:
[0084] 7X17.7% ^ 聚醚改性有机硅润湿剂 0.2%、 丙烯酸钠盐分散剂 0.5%、 水性有机硅 消泡剂 0.3%、 疏水改性丙烯酸缔合型增稠剂 3%、 水溶性聚氨酯分散体 36%、 氨 水 0.3%、 镍锌铁氧体磁粉 42%。
[0085] 对比例 2
[0086] 本实施例提供一种水性电磁屏蔽涂料, 其包括如下重量份的组分: [0087] 7X20.7% ^ 聚醚改性有机硅润湿剂 0.2%、 丙烯酸钠盐分散剂 0.5%、 水性有机硅 消泡剂 0.3%、 水溶性聚氨酯分散体 36%、 氨水 0.3%、 镍锌铁氧体磁粉 42%。
[0088] 涂料形成涂层的相关性能测试
[0089] 将实施例 1~4提供的水性吸波涂料和对比例提供的涂料形成涂层后于 65°C经过 2 0分烘烤后测试如下表 1中相关性能, 测试结果如下表 1所示。
[0090] 表 1
[]
[] [表 1]
Figure imgf000011_0001
[0091] 将上述各实施例和对比例提供的水性吸波涂料形成的涂层进行在电磁波吸收实 验中在 0.2-18GHZ频段范围内最大吸收峰达到 -26dbB 其余频段均超过 -10GHZ , 结合表 1可知, 本发明实施例水性吸波涂料的涂层附着力强, 硬度高, 电磁波 吸收效果。 另外, 也说明了所述水性吸波涂料分散体系均匀。
[0092] 以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本发明的 精神和原则之内所作的任何修改、 等同替换和改进等, 均应包含在本发明的保 护范围之内。

Claims

权利要求书
[权利要求 1] 一种水性吸波涂料, 包括如下重量百分比的组分:
水 15%-25%
水性分散剂 0.5%-1%
水性润湿剂 0.5%-2%
水性消泡剂 0.1%-0.5%
水性增稠剂 0.5%-2%
铁磁性吸波粉 35%-45%
水溶性丙烯酸共聚物 35%-55%
水溶性粘接剂 3%-5%
pH调节剂 0.1%-1%。
[权利要求 2] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述水性分散剂 包括德谦 W-19、 陶氏 X-100、 BYK-110中的至少一种。
[权利要求 3] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述水性润湿剂 包括 BYK-3400、 迪高 TEGO270、 广州冠志 OS-1400中的至少一种。
[权利要求 4] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述水性消泡剂 包括巴斯夫 A38、 迪高 810、 科莱恩 544X中的至少一种。
[权利要求 5] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述水性增稠剂 包括广州阿美斯 AMS-201、 罗门哈斯 ASE-60、 陶氏 TT-935中的至少 一种。
[权利要求 6] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述铁磁性吸波 粉包括镍锌铁氧体粉、 锰锌铁氧体粉、 铁硅铝粉、 铁镍钼粉、 铁硅铬 粉、 羰基铁粉中的至少一种。
[权利要求 7] 根据权利要求 1或 6所述的水性吸波涂料, 其特征在于: 所述铁磁性吸 波粉为经过偶联剂表面改性处理的铁磁性吸波粉。
[权利要求 8] 根据权利要求 7所述的水性吸波涂料, 其特征在于: 所述偶联剂包括 硅烷类偶联剂、 钛酸酯类偶联剂、 铝酸酯类偶联剂、 锆酸酯类偶联剂 中的至少一种。
[权利要求 9] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述水溶性丙烯 酸共聚物包括水性聚氨酯和丙烯酸共聚分散体、 阴离子水性聚氨酯、 水性聚氨酯分散体中的一种或两种混合物; 和 /或 所述水溶性粘接剂包括聚乙烯醇。
[权利要求 10] 根据权利要求 1所述的水性吸波涂料, 其特征在于: 所述 pH调节剂为 氨水、 甲基醇胺类聚合物中的一种或两种混合物。
[权利要求 11] 根据权利要求 1-6、 8-10任一所述的水性吸波涂料, 其特征在于: 所 述水性吸波涂料包括如下重量百分比的组分:
水 14.7%
聚醚改性有机硅润湿剂 0.2%
丙烯酸钠盐分散剂 0.5%
水性有机硅消泡剂 0.3%
疏水改性丙烯酸缔合型增稠剂 3%
水溶性聚氨酯分散体 36%
聚乙烯醇水溶液 3%
氨水 0.3%
镍锌铁氧体磁粉 42%。
[权利要求 12] 根据权利要求 1-6、 8-10任一所述的水性吸波涂料, 其特征在于: 所 述水性吸波涂料包括如下重量百分比的组分:
水 18%
聚醚改性有机硅润湿剂 0.2%
丙烯酸钠盐分散剂 0.5%
水性有机硅消泡剂 0.3%
疏水改性丙烯酸缔合型增稠剂 3%
水溶性聚氨酯分散体 32%
聚乙烯醇水溶液 2.5%
氨水 0.3%
镍锌铁氧体磁粉 43.2%。
[权利要求 13] 根据权利要求 1-6、 8-10任一所述的水性吸波涂料, 其特征在于: 所 述水性吸波涂料包括如下重量百分比的组分:
水 16%
聚醚改性有机硅润湿剂 0.2%
丙烯酸钠盐分散剂 0.5%
水性有机硅消泡剂 0.3%
疏水改性丙烯酸缔合型增稠剂 3%
水溶性聚氨酯分散体 30%
聚乙烯醇水溶液 2.5%
氨水 0.3%
镍锌铁氧体磁粉 47.2%。
[权利要求 14] 根据权利要求 1-6、 8-10任一所述的水性吸波涂料, 其特征在于: 所 述水性吸波涂料形成的涂层在 0.2- 18GHZ频段范围内吸收峰达到 -26db B。
[权利要求 15] 一种水性吸波涂料的制备方法, 其特征在于, 包括如下步骤:
按照权利要求 1-14任一所述的水性吸波涂料所含组分和所述组分的比 例称取各组分;
将称取的各所述组分进行混料处理。
[权利要求 16] 根据权利要求 15所述的水性吸波涂料的应用, 其特征在于: 所述混料 处理方法如下:
先将称取的铁磁性吸波粉加入至偶联剂的水溶液中进行混合处理并在 于 85°C-95°C下加热处理直至水分被蒸干, 获得偶联剂改性的铁磁性 吸波粉;
将所述偶联剂改性的铁磁性吸波粉与称取的其他组分进行混料处理。
[权利要求 17] 根据权利要求 1-14任一所述的水性吸波涂料在制备塑料、 树脂、 玻璃 、 陶瓷、 木质、 皮革、 金属、 布匹中的任一种材质工件中的应用。
[权利要求 18] 根据权利要求 17所述的水性吸波涂料的应用, 其特征在于: 所述工件 包括用于军用雷达、 隐形飞机、 智能数码、 厨电产品、 无线网卡壳体 移动基站箱体、 医疗仪器、 屏蔽布中的任一种
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