JP2006213909A - Resin composition excellent in anticorrosion property and/or conductivity and member coated with resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition useful as a pollution-free anticorrosion agent that can be easily used for painting while taking advantage of the conventional corrosion prevention (anticorrosive) method, moreover exhibits excellent anticorrosive and electroconductive properties equivalent to or higher than those in the case of hot dipping, does not induce any thermal brittleness to a base material, does not require any additional treatment such as pore sealing, and can conduct painting work that can cope with aged deterioration without anxiety about residual stress even in the case of thick coating, and further useful as a pollution-free electromagnetic wave shielding agent that can solve problems of a conventional electromagnetic wave shielding technology and can exhibit electromagnetic wave shielding property having a uniform coating structure by a conventional painting work without selecting working place, and to provide a resin-coated member in which the surface of the base material is coated with the resin composition. <P>SOLUTION: This resin composition comprises a resin and a clad-shaped scaly micropowder of different sort of metals containing at least either (a) Zn and/or Al formed into a scaly micropowder or (b) Cu and/or Ni formed into a scaly micropowder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention can be applied easily, has a conductivity by blending a small amount of metal powder, and / or has an excellent rust prevention (anticorrosion) property equal to or better than that of galvanization, and blocks electromagnetic waves. The present invention relates to a resin composition that also exhibits excellent shielding properties, and a resin-coated member coated with such a resin composition.

  In steel materials, it is necessary to prevent corrosion (rust prevention) on the surface, but as such a method, (I) by coating the surface with a multilayer film with paint or other organic resin material, oxygen, sulfide, halogen Coating method for blocking contact with chemicals, etc. (II) Hot-dip plating method in which the object to be treated is immersed in molten zinc or molten zinc-aluminum for a certain period of time, and zinc-aluminum is adhered and formed. (III) Zinc and aluminum are gasses There is known a metal spraying method or the like that melts with a frame or an arc, adheres to the surface of a steel material or the like, and rusts by applying a sacrificial anode reaction due to a potential difference between metals (for example, Patent Documents 1 to 4).

On the other hand, with the spread of various electronic devices, wireless LANs, mobile phones, etc. and the arrival of the ubiquitous era, electromagnetic interference and information leakage are regarded as problems, and the importance of electromagnetic shielding has increased, and various electromagnetic shielding materials and coatings in use. As such techniques, there are known techniques such as laminating metal plates and laminating a shield plate in which a conductive filler is mixed into a building material. In addition, an electromagnetic shielding material or an electromagnetic shielding paint in which a metallic filler or fiber is mixed in synthetic rubber or synthetic resin has been proposed (for example, Patent Documents 5 and 6). Furthermore, a technique for improving electromagnetic wave shielding properties by imparting conductivity by a method such as metal plating or metal vapor deposition is also known.
JP, 2001-271152, A Claims, etc. JP-A-9-125221, claims, etc. JP-A-9-3614, claims, etc. Japanese Patent Application Laid-Open No. 8-176781, claims, etc. JP, 2002-309107, A Claims etc. JP, 10-316901, A Claims etc.

  It has been pointed out that the various rust prevention (corrosion prevention) methods described above have the following problems. First, in (I) the rust prevention (corrosion prevention) method by painting, organic solvent-based paints are mainly used, but the hardness is insufficient and scratches due to surface damage and wear occur, which are the causes. There is a problem in that the function of blocking the atmosphere and deterioration are induced, and corrosion occurs due to damage due to deterioration caused by ultraviolet rays.

  (II) Although the hot dip plating method has a corrosion resistance of 10 to 15 years, a large plant for immersing the workpiece in hot dip zinc or the like is necessary to implement it. There is a problem that it cannot be applied to maintenance. In particular, it cannot be applied to thin steel plates and long steel materials due to problems such as melting temperature, immersion pool, and distortion of workpieces due to high temperatures.

  Recently, zinc and aluminum alloy plating technology is also progressing, but the cost of facilities such as ceramic furnaces is high, and environmental regulations are becoming more stringent for wastewater treatment of the hazardous substances used, and there are also problems from an economic standpoint. is there. Furthermore, in zinc / aluminum alloy plating, the size of the crystal grains of zinc and aluminum produced varies depending on the cooling temperature of zinc and aluminum, so that there is a problem in characteristics that corrosion is likely to occur from the so-called grain interface. .

  (III) The metal spraying method is characterized by forming a functional surface such as zinc / aluminum alloy directly on the surface of the steel material, so the internal metal is protected by the sacrificial anode reaction, so it can exhibit corrosion resistance higher than galvanization. However, mechanical equipment for metal spraying (spraying gun, power supply device, air blower, wire take-up / feeding device, spraying extension cord, etc.) is necessary, and construction efficiency depends on the skill of craftsmen.・ Even if the burden of maintenance is large, there is a problem that it is necessary to consider profitability, and there are difficulties in thermal spraying to existing steel structures and construction in narrow structures. Also, in order to melt zinc and aluminum and force them to adhere to the surface of the workpiece, the surface of the steel structure is subjected to shot blasting or sand blasting, and a rough surface forming agent is used to exert the anchor effect. Processing is required. Furthermore, if the metal sprayed surface is made thicker in order to enhance the effect of metal spraying, there is a problem in that adhesion deterioration such as peeling of the metal sprayed layer is observed due to the generation of internal strain and residual stress due to the difference in heat dissipation effect. In addition, since a spongy hole is formed on the surface of the sprayed material, there is a drawback that a sealing process is further required.

  On the other hand, the following problems have been pointed out in the electromagnetic wave shielding methods proposed so far. For example, in the method of pasting metal plates and pasting shield plates mixed with conductive filler into building materials, it is impossible to construct narrow parts, complicated shapes, uneven surfaces, joints, etc. There is a problem that electromagnetic waves leak from the gap between the bonded portions and cannot be completely blocked even if they are covered with conductive tape. In particular, there is a drawback that the construction cost is high in terms of profitability. In addition, in conductive shield paints, it is possible to apply narrow parts, complex shapes, and uneven parts and prevent leakage of electromagnetic waves. However, since organic paints and organic solvents (toluene, etc.) are used for the paint components, they remain. Environmental problems due to volatilization of harmful substances (formaldehyde etc.), temperature, humidity, electromagnetic wave leakage from cracks due to aging due to ultraviolet rays are listed as problems. Further, even in the synthetic rubber electromagnetic wave sheet and the electromagnetic wave shielding film, there is a problem that even if the seam is closed with a conductive tape, the electromagnetic wave cannot be completely blocked due to peeling of the tape or the like.

  The present invention has been made under such circumstances, and its purpose is to be able to easily apply while taking advantage of the conventional rust prevention (corrosion prevention) method, and to be superior to or equal to hot dipping. Exhibits rust prevention and conductive properties, does not cause heat embrittlement in the base material, requires no additional treatment such as sealing, and can be applied to deal with aging without worrying about residual stress even when thickly applied. As a non-polluting rust preventive, it is a non-polluting electromagnetic wave that solves the problems of conventional electromagnetic shielding technology and exhibits an electromagnetic shielding characteristic with a uniform coating structure by the conventional coating method regardless of construction site It is an object of the present invention to provide a resin composition useful as a shielding agent, and a resin-coated member obtained by coating such a resin composition on a substrate surface.

  The resin composition of the present invention that has achieved the above-mentioned object includes (a) Zn and / or Al formed in a scale-like fine powder, and (b) Cu and / or formed in a scale-like fine powder. Alternatively, the present invention has a gist in that a clad scale fine powder of a dissimilar metal containing at least one of Ni is blended in a resin. If necessary, the resin composition preferably contains a powder or alloy powder of one or more elements selected from the group consisting of Mn, Mg, Mo, Li, C, and Ag.

As the resin used in the resin composition of the present invention, the general ^{_{formula, R 1 N Si (OR 2}} ) 4-N ( wherein, ^{R 1} is a hydrocarbon group having 1 to 10 carbon atoms, ^{R 2} is carbon A silane compound represented by an alkyl group having 1 to 3 carbon atoms, an acyl group having 2 to 3 carbon atoms, or an alkoxyacyl group having 3 to 5 carbon atoms, and N is an integer of 0 to 2, or a partial hydrolysis thereof. A curable silicone resin made of a condensate is exemplified.

  If necessary, the resin composition of the present invention may contain (1) metal alkoxide (excluding Si alkoxide) or lithium hydroxide (LiOH), thereby further improving the properties of the resin composition. be able to.

  By covering the substrate surface with the resin composition as described above, a resin composition-coated member excellent in rust prevention and conductivity can be obtained.

  In the present invention, (a) Zn and / or Al formed on a scale-foil fine powder, and (b) Cu and / or Ni formed on a scale-foil fine powder. By mixing a finely divided clad scale fine powder of a different metal comprising at least one of the resin with a resin, the fine powder can be easily applied, and has conductivity with a small amount of metal powder, and / or Alternatively, a resin composition having excellent rust prevention (corrosion prevention) equivalent to or higher than that of galvanizing and also exhibiting excellent shielding properties for shielding electromagnetic waves has been realized.

  The present inventor has intensively studied to achieve the above object. As a result, a dissimilar metal comprising (a) Zn and / or Al formed on the scale-foil fine powder and (b) Cu and / or Ni formed on the scale-foil fine powder. As a result, it was found that a resin composition capable of achieving the above-described object can be realized by blending the clad scale foil fine powder with a resin.

  As the above components (a) and (b), a scaly fine powder is used, and “a scaly fine powder” means a flaky fine powder to which a stamping mill or a ball mill is applied. Can be manufactured. For example, in the case of Al, the Al foil can be made into an aluminum scale foil-like fine powder by the above method. In addition, by appropriately combining the components (a) and (b) formed into a scale-foil-like powder and applying impact pressure in an inert atmosphere with a vibration mill or the like, the electrostatic action due to the difference in hardness and impact energy As a result, other powders are irregularly pressure-bonded to the powder surface, resulting in a clad scale foil fine powder.

  The resin composition of the present invention needs to contain at least one of the component (a) and the component (b), but the combination of the clad scale fine powder is not necessarily limited to the component (a) and the component (b). It is not necessary to use the components, and it is also possible to use a clad scale fine powder composed of (a) components or (b) components. For example, by pulverizing Zn powder and Al powder formed into a scale-foil-like fine powder with a vibration mill, the Al scale foil powder having low hardness is irregular on the surface of the Zn scale foil powder as the base material. To be clad by completely covering or partially covering the surface of the Zn powder to form a composite material of different metals. Such a situation is the same for the components (b) or between the components (a) and (b). However, when selecting (a) components or (b) components, it is inevitably necessary to use a combination of “Zn powder and Al powder” or “Cu powder and Ni powder” to form a clad of dissimilar metals. A scale foil fine powder will be comprised.

  The component (a) is a scale-like Zn and / or Al fine powder, and the size (particle size) is preferably about 10 to 50 μm and the thickness is about 1 to 10 μm, more preferably the size: The thing of 15-30 micrometers and thickness 2-6 micrometers is good. The component (b) is a scale-like Cu and / or Ni fine powder, but the size (particle size) is preferably about 10 to 30 μm and the thickness is about 0.5 to 5 μm, more preferably large. A thickness of about 10 to 20 μm and a thickness of about 1 to 3 μm is preferable.

  By blending the above clad scale fine powder into the resin, a resin composition excellent in rust prevention and / or conductivity could be realized. By adopting such a configuration, not all of the reasons why the above-mentioned effects can be obtained have been elucidated, but the following could probably be considered. That is, in the case where the clad scale fine powder as described above is blended in the resin, the metal powder can be made uniform in the resin and the coating film has a uniform coating structure. It was considered that the conductivity was excellent.

  In order to exert the effect of the present invention, the blending ratio of the clad scale fine powder to the resin is preferably 50% by mass or more. However, when it is excessively blended, the ratio of the resin is reduced and the paintability is reduced. Since it deteriorates, it is preferable to make it 60 mass% or less.

  The clad scale fine powder used in the rust inhibitor of the present invention preferably has a size (particle size) of about 10-50 μm and a thickness of about 1-8 μm, more preferably a size of 20-40 μm, The thing of thickness 2-5 micrometers is good.

  In addition, what is necessary is just to set the ratio when making it clad in each component, but when combining Zn and Al, for example, the zinc component is in the range of about 70 to 95% by mass with respect to the total mass of Zn and Al. What is necessary is just to be 85 mass%-95 mass%. The closer the volume with respect to the ratio of zinc and aluminum is to the same capacity, the more effective the rust-proofing effect of the sacrificial anode effect due to the difference in standard electrode potential.

  For example, in the zinc / aluminum clad fine powder, by laminating each component, the standard electrode potential of Al is -1.662V, the standard electrode potential of zinc -0.762V, the standard electrode potential of iron -0.0. Since it is 447 V, the rust prevention property is improved by the sacrificial anode effect due to the potential difference between them.

  The component (a) contributes to improvement of rust prevention, and the component (b) contributes to conductivity (electromagnetic wave shielding property). What is necessary is just to set arbitrarily about the mixing | blending ratio of (a) component and (b) component according to the characteristic requested | required.

  If necessary, it is also useful to blend one or more elemental powders or alloy powders selected from the group consisting of Mn, Mg, Mo, Li, C and Ag into the resin composition of the present invention. By reducing the gap between the powder particles in the resin, these components make the dispersed state of the powder particles more airtight, further improving the uniformity of the metal powder in the resin and the uniform coating film structure. These components are also effective for imparting electrical conductivity in the same manner as the component (b). In order to exhibit these effects, about 1-12 mass% is suitable for the mixture ratio in resin. Of these components, C powder (graphite powder) formed in a scale foil shape is particularly preferable. Moreover, in order to exhibit the effect by the mixing | blending of these components more effectively, the magnitude | size (particle size) has preferable about 1-10 micrometers.

  As the resin used in the resin composition of the present invention, various resins such as a modified silicone resin and a curable silicone resin can be used, and the kind thereof is not particularly limited, but is represented by the general formula (1) described later. A curable silicone resin comprising a silane compound or a partially hydrolyzed condensate thereof is preferred.

  Conventionally, as the curable silicone resin, a so-called silicone varnish solution in which a curable silicone resin having a terminal silanol group is dissolved in an organic solvent such as toluene or xylene is frequently used. There is a problem like 2).

(1) An organic solvent having a low flash point is an essential component.
(2) Generally, for the formation of a cured coating film, heat curing for a long time at 150 ° C. or higher is required. For this reason, a large amount of energy is required for curing, and the application range is limited to the line coating method, so that on-site construction is basically impossible.

  Because of these problems, as a solvent-free room-temperature curable silicone resin that does not contain an organic solvent and can be cured at room temperature, a silicone alkoxy oligomer obtained by partial (co) hydrolysis condensation of organoalkoxysilane and, if necessary, The addition of a curing catalyst that promotes moisture curing of this silicone alkoxy oligomer was studied, and by using a resin represented by the following general formula (1), curing at room temperature was possible, and maintenance and maintenance of existing steel structures were possible. It can now be applied to both internal and external electromagnetic shield construction.

  By blending the clad scale powder with the curable silicone resin as described above, a uniform laminated film can be formed and the resin composition can be further improved in film properties.

  There are two types of inorganic zinc paints that have been used in the past: a type in which a powder such as zinc is mixed with an inorganic polymer silicone paint system, and a type in which it is washed with a modified silicone immediately before use. : The conductivity cannot be exhibited unless the content is about 90 to 96% by mass. In addition, there are organic or inorganic rust preventive paints mixed with simple scale metal powder, but because of the mixture of single metal powder, the arrangement in the coating is irregular and the rust prevention (anticorrosion) effect becomes uneven. And electroconductivity cannot be exhibited unless it contains zinc powder: 90-96 mass% as a metal solid component.

  On the other hand, in the resin composition according to the present invention, it is possible to impart conductivity by blending a small amount of clad scale foil powder, and it is possible to ensure good rust prevention (corrosion prevention). When the metal powder is blended in an amount of 90 to 96% by mass, the formed surface becomes rough and porous, so that the effect is not exhibited unless the film thickness is 100 μm or more. However, the film formation by the resin composition of the present invention is not possible. The effect is exhibited even when the film thickness is about 50 μm. With the resin composition of the present invention, excellent workability that can be applied simply as in the conventional coating method, and even if the amount of metal powder is reduced, the resulting film is an inorganic zinc paint, organic / inorganic rust-proof paint In addition to exhibiting excellent rust prevention properties equivalent to or better than those of hot dip galvanizing and metal spraying, it has various advantages such as the need for troublesome post-treatment such as sealing treatment.

  As described above, in the resin composition in which the clad scale powder is blended with the curable silicone resin, the hydrolyzable reactive group -OR (a) of the curable silicone resin undergoes a hydrolysis reaction, and the metal surface (Me) By adsorbing with a hydroxyl group in a hydrogen bond and then dehydrating and condensing, a chemical bond (Me-O-Si-OR) can be formed to form a film firmly adhered to the steel structure material. The clad scale fine powder is a heterogeneous metal bond (for example, a partial chemical bond state such as OR-Al-O-Si-O-Zn-O-Si-OR) by hydrolysis / dehydration condensation reaction. Because it forms, the metal powder can be firmly fixed in the film, and the cured silicone resin has no residual harmful components and has excellent weather resistance, so it is durable and pollution-free rust prevention (Anti-corrosion) property is exhibited.

The curable silicone resin preferably used in the present invention contains an alkoxysilyl group, which is a silane compound represented by the following general formula (1) or a partial (co) hydrolysis condensate thereof. A seed or a mixture of two or more.
R ¹ _N Si (OR ² ) _4-N (1)

R ¹ in the general formula (1) may be the same or different and is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, specifically a methyl group, an ethyl group, or a propyl group. And alkyl groups such as butyl, hexyl, octyl and decyl, cycloalkyl such as cyclohexyl, alkenyl such as vinyl and allyl, and aryl such as phenyl and tolyl.

R ² is an alkyl group having 1 to 3 carbon atoms, an acyl group having 2 to 3 carbon atoms, or an alkoxyalkyl group having 3 to 5 carbon atoms, specifically a methyl group, an ethyl group, a propyl group, Examples include alkyl groups selected from isopropyl groups, acyl groups such as acetyl groups, and alkoxyalkyl groups such as methoxyethyl groups, ethoxyethyl groups, propoxyethyl groups, methoxypropyl groups, and ethoxypropyl groups.

  N in the general formula (1) is an integer of 0 to 2 (N = 0, 1, 2), but the curability of the resin composition, the surface hardness of the cured coating film, the adhesion to the substrate, and the like. In view of the above, in the curable silicone resin, the proportion of N = 1 silane compound and / or its partial (co) hydrolysis condensate is preferably 30 mol% or more, more preferably 40 to It is good that it is 100 mol%. The proportion of the N = 0 silane compound and / or the partial (co) hydrolysis condensate thereof is preferably 40 mol% or less in the curable silicone resin, and the N = 2 silane compound and / or The proportion of the partial (co) hydrolysis condensate is preferably 60 mol% or less in the curable silicone resin.

  As a curable silicone resin component, in addition to the N = 1 silane compound and / or its partial (co) hydrolysis condensate, the N = 0 silane compound and / or its partial (co) hydrolysis condensate is added. The surface hardness of the cured film (resin film) can be increased, but if the amount is too large, cracks may occur on the surface of the film, and the N = 2 silane compound and / or part thereof (both) When the hydrolyzed condensate is used in combination, toughness and flexibility are imparted to the cured coating film, but if the amount is too large, a sufficient crosslinking density cannot be obtained, which may reduce the surface hardness and curability. is there.

  Specific examples of such silane compounds and partial (co) hydrolysis condensates thereof include tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, methyltriacetoxysilane, Methyltris (methoxyethoxy) silane, methyltris (methoxypropoxy) silane, ethyltrimethoxysilane, propyltrimethoxysilane, butyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, cyclohexyltrimethoxysilane, vinyl Trimethoxysilane, vinyltriethoxysilane, allyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, tolyltrimethoxysilane, Anoethyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ -Acryloxypropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane Γ-mercaptopropyltrimethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, methylethyldimethoxysilane, methylpropyldimethoxysilane, methylvinyldimethoxysilane, Ruallyldimethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, methylphenyldimethoxysilane, γ-chloropropylmethyldimethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane , Γ-methacryloxypropylmethyldimethoxysilane, γ-acryloxypropylmethyldimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-β (aminoethyl) γ-aminopropylmethyldimethoxysilane, γ-mercaptopropylmethyldiethoxy Examples thereof include alkoxysilanes such as silane or acyloxysilanes, and partial (co) hydrolysis condensates thereof.

Among these silane compounds and silane compounds as precursors of partial (co) hydrolysis condensates, versatility, cost, curability when used as rust preventives and electromagnetic shielding agents, and coating (film) properties In view of the above, it is preferable to use a silane compound in which R ¹ in the general formula (1) is a group selected from a methyl group and a phenyl group, and R ² is a group selected from a methyl group and an ethyl group, Specific examples include methyltrimethoxysilane, methyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diphenyldimethoxysilane, and diphenyldiethoxysilane.

  As a partial (co) hydrolysis condensate, a dimer of the silane compound as described above (one having 2 moles of alcohol removed by acting 1 mole of water on 2 moles of the silane compound to form disiloxane units) to 100-mer may be used, preferably 2-50-mer, more preferably 2-30-mer, and partial (co) hydrolytic condensation using two or more silane compounds as raw materials. Things can also be used.

  As the curable silicone resin that may be used in the resin composition of the present invention, the above-described silane compound or a partial (co) hydrolysis condensate thereof may be used alone, but two or more types of silanes having different structures may be used. It is also possible to use a compound or a partial (co) hydrolysis condensate, or to use a silane compound and a partial (co) hydrolysis condensate in combination. However, partial (co) hydrolysis condensate is an essential component from the viewpoint of volatility at the time of mixing and coating, workability, ease of curability control, and the amount of alcohol generated by moisture curing. It is preferable.

  In addition, the partial (co) hydrolysis condensate as described above can be used as a commercially available silicone alkoxy oligomer. However, based on a conventional method, less than an equivalent amount of hydrolyzed water is reacted with a hydrolyzable silane compound. Then, by-products such as alcohol and hydrochloric acid can be removed. As the raw material hydrolyzable silane compound, for example, when using alkoxysilanes and acyloxysilanes as described above, acids such as hydrochloric acid and sulfuric acid, alkali metals such as sodium hydroxide and potassium hydroxide, or alkaline earths What is necessary is just to carry out partial hydrolysis condensation using alkaline organic substances such as metal hydroxides and triethylamine as a reaction catalyst, and in the case of producing directly from chlorosilanes, by reacting water and alcohol using by-product hydrochloric acid as a catalyst. Good.

  In addition, when considering the workability at the time of mixing each component, the paintability of the rust preventive agent / electromagnetic shielding agent and the rust preventive effect / shield effect, the viscosity (mechanical viscosity) of the curable silicone resin component at 25 ° C. is It is preferably 1 to 200 mPa · s, more preferably 5 to 50 mPa · s, still more preferably about 10 to 30 mPa · s, and the above-described silane compound can be used for the purpose of adjusting viscosity and curability. In some cases, solvent components such as alcohols may be used in combination.

  In addition, a silane coupling agent having an epoxy group, an amino group, a mercapto group or the like is added for the purpose of improving the adhesion to the base material, or a silanol group-containing silicone resin is partially used for the purpose of improving the coating film properties. Is also possible.

  It is also effective to contain (1) metal alkoxide and (2) lithium hydroxide (LiOH) as necessary in the resin composition of the present invention. Among these, metal alkoxide penetrates between the three-dimensional crosslinking formed by the curable silicone resin, and the metal ions released by reaction with moisture improve the conductivity of the film, strengthen sacrificial anodic action and electromagnetic wave shielding characteristics, and prevent The rust effect and electromagnetic wave shielding effect can be improved.

  As the type of metal alkoxide, various alkoxides such as Al, Li, Sn, Zr, Fe, and Zn can be used, but Si alkoxide cannot be employed from the viewpoint of metal ionization. Of these, Al alkoxide is particularly effective in increasing conductivity and can be preferably used. As the alkoxy group, a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, a hexyloxy group, a phenoxy group, and the like can be shown, but an isopropoxy group is preferable from the viewpoint of easy handling. Particularly preferred is aluminum triisopropoxide.

  When the metal alkoxide is used, it may be used in combination with alcohols. As alcohol used at this time, monohydric alcohol is mentioned as a preferable thing, Especially 2-propanol is preferable. The content of the metal alkoxide may be in the range of 1 to 20 parts by mass with respect to 100 parts by mass of the resin component from the viewpoint of the ratio of the metal powder and metal ions and the prevention of gelation of the silicone resin, preferably 8 It is the range of -15 mass parts.

  On the other hand, by mixing lithium hydroxide with a curable silicone resin, like the metal alkoiside, partially liberated Li ions impart conductivity to the silicone resin, and the three-dimensional crosslinking formed by the curable silicone resin. It is possible to improve the conductivity of the film, enhance the sacrificial anodic action and electromagnetic wave shielding characteristics, and improve the antirust effect and electromagnetic wave shielding effect.

  Lithium hydroxide can use hydrates and anhydrides, but if hydrates are mixed with the curable silicone resin, the viscosity is likely to increase due to hydrolysis reaction, so use anhydrides. It is preferable.

  The content in the case of using the above lithium hydroxide anhydride may be 0.1 to 5 parts by mass, preferably 0.5 to 2 parts by mass with respect to 100 parts by mass of the resin component. .

  In the resin composition of the present invention, if necessary (when a curable silicone resin is used), a curing catalyst for moisture curing the curable silicone resin containing an alkoxysilyl group may be used. Examples of such curing catalysts include acids such as phosphoric acid; organic amines such as triethanolamine; organic amine salts such as dimethylamine acetate; quaternary ammonium salts such as tetramethylammonium hydroxide; sodium hydrogencarbonate and the like. Alkali (earth) metal salts of organic acids; aminoalkylsilane compounds such as γ-aminopropyltriethoxysilane; carboxylic acid metal salts such as zinc octylate; organotin compounds such as dioctyltin dilaurate; tetraisopropyl titanate, tetrabutyl Examples thereof include titanate esters such as titanate; metal chelate compounds such as acetylacetone aluminum salt.

  The amount of the curing catalyst is different depending on the type of the curable silicone resin component and the curing catalyst used and the desired curing speed, but if it is too little or too much, the curability, workability, storage stability, and coating properties In general, it may be in the range of 0.1 to 20 parts by mass, preferably in the range of 0.5 to 10 parts by mass with respect to 100 parts by mass of the curable silicone resin component. Is good.

  In the resin composition of the present invention, various pigments, dyes, fillers, adhesiveness improvers, leveling improvers, inorganic and inorganic compounds are added in addition to the above components within a range that does not interfere with the effects of the present invention depending on the purpose of use. It is optional to add organic ultraviolet absorbers, storage stability improvers, plasticizers, anti-aging agents and the like.

  In producing the resin composition of the present invention, the clad scale fine powder may be blended in the resin. Specifically, first, a resin component and a metal alkoxide are sufficiently mixed in a dispersion stirrer. Then, a predetermined amount of clad scale fine powder composed of the component (a) and / or the component (b) may be added and mixed, and stirred for 60 minutes to 120 minutes. The mixing is preferably carried out in a nitrogen atmosphere for the purpose of preventing hydrolysis of hydrolyzable groups such as alkoxy groups due to water mixing.

  As a base material on which the resin composition of the present invention is coated, steel materials such as steel materials and cast iron are typical examples for the purpose of imparting rust prevention, and impart electromagnetic wave shielding properties. For the purpose of doing so, wood, gypsum board material, concrete-based material, and plastic material can be mentioned. Examples of the coating method (coating method) at this time include a dipping method, a spray method, a brush coating method, and the like, and it is also possible to perform on-site coating. The coating amount of the resin composition varies depending on the type and purpose of the substrate, but generally the coating thickness after curing may be in the range of 150 to 30 μm, preferably 100. It is in the range of ˜60 μm.

  There are no particular restrictions on the curing conditions of the resin composition, but since it is cured by moisture in the air to form a film, no particular operation such as heating is required, and 30 minutes to 2 at room temperature. It can be dried by allowing it to stand for about an hour (surface tack free state), and the curing reaction can be completed by leaving it for several hours to several days. In this case, it is optional to further heat-treat within a range that does not adversely affect the base material and coating film properties to be coated, but if exposed to high temperatures from the initial stage of the drying process, This is not preferable because the silane compound evaporates or moisture necessary for curing is not supplied.

  The resin composition according to the present invention bonds dissimilar metals in a bridge shape by chemical bonding, becomes stronger with time due to the sharing of internal electrons between metals, and forms a film that bonds semipermanently without cracking or peeling. In the case where such a film is coated on the surface of the substrate, a resin composition-coated member having excellent rust prevention and conductivity is obtained.

  Hereinafter, the effects of the present invention will be described more specifically by way of examples. However, the present invention is not limited to the following examples, and it is possible to make design changes as appropriate within a range that can meet the purpose described above and below. These are all included in the technical scope of the present invention.

  As the components in the resin composition of the present invention, the following (A) to (H) were prepared, and the resin compositions of the following Examples 1 to 16 and Comparative Examples 1 to 10 were prepared using these components. .

( A) component (clad scale foil powder)
(A-1): Cladding component ratio is 100% by mass of zinc / aluminum fine powder, zinc powder: 88% by mass, aluminum powder: 12% by mass; size (particle size): 20 to 40 μm, thickness 1-5μm (purity 98%)
(A-2): Cladding component ratio is 100% by mass of zinc / aluminum fine powder, zinc powder: 90% by mass, aluminum powder: 10% by mass; size (particle size): 20 to 40 μm, thickness 4-7μm (98% purity)
(A-3): The cladding component ratio is 100% by mass of nickel / aluminum fine powder, nickel powder: 90% by mass, aluminum powder: 10% by mass; size (particle size): 15-30 μm, thickness 3-6μm (purity 98%)
(A-4): The clad component ratio is 100% by mass of nickel / copper fine powder, nickel powder: 98% by mass, copper powder: 2% by mass; size (particle size): 15-30 μm, thickness 3-6μm (purity 98%)
(A-5): The cladding component ratio is zinc powder: 90% by mass, aluminum powder: 9.5% by mass, copper powder: 0.5% with respect to 100% by mass of zinc / aluminum / copper fine powder total; Size (particle size): 20-40 μm, thickness 4-7 μm (purity 98%)
(A-6): The cladding component ratio is nickel powder: 95% by mass, aluminum powder: 5% by mass, size (particle size): 15-30 μm, thickness with respect to nickel / aluminum fine powder total 100% by mass 3-6μm (purity 98%)
(A-7): The clad component ratio is 100% by mass of nickel / copper / aluminum fine powder, nickel powder: 99.5% by mass, copper powder: 0.4% by mass, aluminum powder: 0.1 Mass%; Size (particle size): 15-30 μm, thickness 3-6 μm (purity 98%)
(B) component (curable silicone resin)
(B-1): Partially hydrolyzed condensate of methyltrimethoxysilane (average polymerization degree: 5, viscosity 5 mPa · s
(B-2): Partial hydrolysis-condensation product of methyltrimethoxysilane (average polymerization degree: 25, viscosity: 15 mPa · s
(B-3): Partially co-hydrolyzed condensate of 85% by mole of methyltriethoxysilane and 15% by mole of diphenyldimethoxysilane (average polymerization degree: 10, viscosity: 35 mPa · s)
(B-4): Partially co-hydrolyzed condensate of 70% by mole of methyltrimethoxysilane and 30% by mole of dimethyldimethoxysilane (average degree of polymerization: 20, viscosity: 100 mPa · s)
(B-5): Dimethyldimethoxysilane
Component (C) (metal alkoxide or lithium hydroxide)
(C-1): Aluminum triisopropoxide (C-2): Lithium hydroxide
(D) Other components (curing catalyst, solvent)
(D-1): Di-n-butoxy ethylacetoacetate aluminum (D-2): Tetraisopropoxytitanium (D-3): Absolute ethanol
Component (E) (nickel fine powder formed in a scale foil shape)
(E-1) Size (particle size): 10 to 30 μm, thickness 1 to 5 μm (purity 98%)
Component (F) (nickel fine powder formed in a granular form)
(F-1) Size (particle diameter): 7 to 10 μm (purity 98%)
Component (G) (fine graphite powder formed in a scale foil shape)
(G-1) Size (particle size): 4-8 μm
Component (H) (silver fine powder formed into granules)
(H-1) Size (particle size): 0.5-2 μm (purity 98%)

[Example 1]
(1) Under room temperature and nitrogen atmosphere, (B-1): 62 parts by mass, (B-2): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), 10 parts by mass of (C-1): metal alkoxide of component (C) was further added and stirred and mixed again.
(2) (A-1): 100 mass parts was prepared as (A) component.
(3) Mixture of (B), (C), (D) component prepared in step (1): 45 parts by mass and mixed powder of component (A) prepared in step (2): 55 parts by mass Then, using a dispersion stirrer, the mixture was sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling.
(4) In order to adjust the viscosity, the mixture of components (A) to (D) prepared in step (3): 100 parts by mass, and (D-3): 4 parts by mass as a solvent was further added and stirred. Mixing was performed to obtain a resin composition. The viscosity of this resin composition was 60 mPa · s.

[Example 2]
(1) The amount of each component used in Example 1 was the same as in step (2) except that (A) component (A-2): 100 parts by mass was prepared to obtain a resin composition. . The viscosity of this resin composition was 50 mPa · s.

[Example 3]
(1) The amount of each component used in Example 1 is (B-2): 18 parts by mass, (B-3): 68 parts by mass as the curable silicone resin of component (B) in step (1). , (B-5): 2 parts by mass was stirred and mixed, and (D-2): 2 parts by mass was further added and mixed as a curing catalyst to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Example 4]
In step (1), the amount of each component used in Example 1 is (B-1): 40 parts by mass, (B-4): 30 parts by mass, (B) as the curable silicone resin of component (B). -5): 12 parts by mass was stirred and mixed, and the same adjustment was performed except that (D-1): 8 parts by mass was further added and mixed as a curing catalyst to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Example 5]
The amount of each component used in Example 1 was adjusted in the same manner as in step (2) except that (A-3): 100 parts by mass was prepared as the component (A) to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Example 6]
(1) Under room temperature and nitrogen atmosphere, (B-1): 59 parts by mass, (B-2): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), 12 parts by mass of (C-1): metal alkoxide of component (C) was further added and stirred and mixed again.
(2) (A-4): 94.5 mass parts was prepared as (A) component.
(3) (F-1): 5 mass parts as (F) component and (G-1): 0.5 mass part as (G) component were prepared.
(4) (B), (C), (D) component mixture prepared in step (1): 40 parts by mass, and (A), (F), () prepared in steps (2), (3) Component G): 60 parts by mass was blended and sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling using a dispersion stirrer.
(5) Mixture of components (A) to (D), (F) and (G) prepared in step (4) for viscosity adjustment: 100 parts by mass with respect to 100 parts by mass (D-3): 5 parts by mass was added and mixed with stirring to obtain a resin composition. The viscosity of this resin composition was 60 mPa · s.

[Example 7]
(1) The amount of each component used in Example 6 was prepared in steps (4), (B), (C), and (D) component mixture: 45 parts by mass, and steps (2) and (3). Components (A), (F), (G): 55 parts by weight were mixed, and the same operation was performed except that the mixture was sufficiently stirred and mixed in a nitrogen atmosphere while maintaining a temperature of 28 ° C. or lower by water cooling using a dispersion stirrer. And a resin composition was obtained. The viscosity of this resin composition was 50 mPa · s.

[Example 8]
(1) In step (1), the amount of each component used in Example 6 was (A-7): 8.3 parts by mass as component (A), and (E-1): 86 as component (E). 2 parts by mass were prepared. Mixture of components (B), (C), (D) prepared in step (4): 40 parts by mass, and components (E), (F), (G) prepared in steps (2), (3) : 60 parts by mass was mixed and sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling using a dispersion stirrer.

  In order to adjust the viscosity, the mixture of components (B) to (D) and (E) to (G) prepared in step (4): 100 parts by mass, and further as a solvent, (D-3): 5 parts by mass And stirring and mixing were performed to obtain a resin composition. The viscosity of this resin composition was 55 mPa · s.

[Example 9]
(1) Under room temperature and nitrogen atmosphere, (B-1): 71 parts by mass, (B-4): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), (C-2): 1 part by mass was further added as lithium hydroxide of component (C), and the mixture was stirred and mixed again.
(2) (A-1): 100 mass parts was prepared as (A) component.
(3) Mixture of (B), (C), (D) component prepared in step (1): 45 parts by mass and mixed powder of component (A) prepared in step (2): 55 parts by mass Then, using a dispersion stirrer, the mixture was sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling.
(4) In order to adjust the viscosity, the mixture of components (A) to (D) prepared in step (3): 100 parts by mass, and (D-3): 4 parts by mass as a solvent was further added and stirred. Mixing was performed to obtain a resin composition. The viscosity of this resin composition was 50 mPa · s.

[Example 10]
(1) The amount of each component used in Example 9 was the same as in step (2) except that (A) component (A-5): 100 parts by mass was prepared to obtain a resin composition. . The viscosity of this resin composition was 50 mPa · s.

[Example 11]
(1) The amount of each component used in Example 9 is (B-4): 18 parts by mass, (B-3): 78 parts by mass as the curable silicone resin of component (B) in step (1). , (B-5): 2 parts by mass was stirred and mixed, and (D-2): 2 parts by mass was further added and mixed as a curing catalyst to obtain a resin composition. The viscosity of this resin composition was 70 mPa · s.

[Example 12]
In the step (1), the amount of each component used in Example 9 is (B-1): 49 parts by mass, (B-4): 30 parts by mass, (B) as the curable silicone resin of the component (B). -5): 12 parts by mass was stirred and mixed, and the same adjustment was performed except that (D-1): 8 parts by mass was further added and mixed as a curing catalyst to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Example 13]
The amount of each component used in Example 1 was adjusted in the same manner as in step (2) except that (A-6): 100 parts by mass was prepared as the component (A) to obtain a resin composition. The viscosity of this resin composition was 80 mPa · s.

[Example 14]
(1) Under room temperature and nitrogen atmosphere, (B-1): 71 parts by mass, (B-4): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), (C-2): 1 part by mass was further added as lithium hydroxide of component (C), and the mixture was stirred and mixed again.
(2) (A-7): 94.5 mass parts was prepared as (A) component.
(3) (F-1): 5 mass parts as (F) component and (G-1): 0.5 mass part as (G) component were prepared.
(4) (B), (C), (D) component mixture prepared in step (1): 40 parts by mass, and (A), (F), () prepared in steps (2), (3) Component G): 60 parts by mass was blended and sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling using a dispersion stirrer.
(5) Mixture of components (A) to (D), (F) and (G) prepared in step (4) for viscosity adjustment: 100 parts by mass with respect to 100 parts by mass (D-3): 5 parts by mass was added and mixed with stirring to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Example 15]
(1) The amount of each component used in Example 14 was prepared in steps (4), (B), (C), and (D) component mixture: 45 parts by mass, and steps (2) and (3). Components (A), (F), (G): 55 parts by weight were mixed, and the same operation was performed except that the mixture was sufficiently stirred and mixed in a nitrogen atmosphere while maintaining a temperature of 28 ° C. or lower by water cooling using a dispersion stirrer. And a resin composition was obtained. The viscosity of this resin composition was 60 mPa · s.

[Example 16]
(1) The usage-amount of each component in Example 14 is (A-7): 89.5 mass parts as (A) component in a process (2), and (E-1): 5 as (E) component. A mass part was prepared. Mixture of components (B), (C), (D) prepared in step (4): 40 parts by mass, and components (E), (F), (G) prepared in steps (2), (3) : 60 parts by mass was mixed and sufficiently stirred and mixed in a nitrogen atmosphere while maintaining at 28 ° C. or lower by water cooling using a dispersion stirrer.

  In order to adjust the viscosity, the mixture of components (B) to (D) and (E) to (G) prepared in step (4): 100 parts by mass, and further as a solvent, (D-3): 5 parts by mass And stirring and mixing were performed to obtain a resin composition. The viscosity of this resin composition was 90 mPa · s.

[Comparative Example 1]
In step (1), the amount of each component used in Example 1 was stirred and mixed in (B-1): 72 parts by mass, (B-2): 18 parts by mass, and (B-5): 2 parts by mass. Further, (D-1): 8 parts by mass as a curing catalyst was added and mixed and stirred. At this time, the component (C) was not used, and the same adjustment was performed except that, and a resin composition was obtained. The viscosity of this resin composition was 60 mPa · s.

[Comparative Example 2]
A galvanized steel sheet was prepared. This galvanized steel sheet is obtained by immersing a test piece of the same size as the test piece produced in the example to have a coating thickness of 60 μm.

[Comparative Example 3]
An organic zinc rich paint was prepared. An acrylic resin product having a zinc content of 98% by mass was used.

[Comparative Example 4]
An inorganic zinc rich paint was prepared. An acrylic silicate resin product having a zinc content of 98% by mass was used.

[Comparative Example 5]
(1) Under room temperature and nitrogen atmosphere, (B-1): 59 parts by mass, (B-2): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), 12 parts by mass of (C-1): metal alkoxide of component (C) was further added and stirred and mixed again.
(2) (E-4): 94.5 mass parts was prepared as (E) component.
(3) (F-1): 5.5 mass parts was prepared as (F) component.
(4) Mixture of components (B), (C) and (D) prepared in step (1): 40 parts by mass and components (E) and (F) prepared in steps (2) and (3): 60 mass parts was mix | blended and fully stirred and mixed in nitrogen atmosphere, keeping at 28 degrees C or less by water cooling using the dispersion stirrer.
(5) Mixture of components (B) to (D), (E), and (F) prepared in step (3) for viscosity adjustment: (D-3) as a solvent with respect to 100 parts by mass: 5 parts by mass was added and mixed with stirring to obtain a resin composition. The viscosity of this resin composition was 60 mPa · s.

[Comparative Example 6]
The amount of each component used in Comparative Example 1 was prepared in the step (2) except that (E-1): 94 parts by mass, (F-1): 5 parts by mass, (H-1): 1 part by mass were prepared. Made the same adjustment to obtain a resin composition. The viscosity of this resin composition was 55 mPa · s.

[Comparative Example 7]
(1) Under room temperature and nitrogen atmosphere, (B-1): 71 parts by mass, (B-2): 18 parts by mass, (B-5): 2 parts by mass as the curable silicone resin of component (B) And (D-1): 8 parts by mass as a curing catalyst was added and stirred and mixed. To this mixture of components (B) and (D), (C-2): 1 part by mass was further added as lithium hydroxide of component (C), and the mixture was stirred and mixed again.
(2) (E-4): 94.5 mass parts was prepared as (E) component.
(3) (F-1): 5.5 mass parts was prepared as (F) component.
(4) Mixture of components (B), (C) and (D) prepared in step (1): 40 parts by mass and components (E) and (F) prepared in steps (2) and (3): 60 mass parts was mix | blended and fully stirred and mixed in nitrogen atmosphere, keeping at 28 degrees C or less by water cooling using the dispersion stirrer.
(5) Mixture of components (B) to (D), (E), and (F) prepared in step (3) for viscosity adjustment: (D-3) as a solvent with respect to 100 parts by mass: 5 parts by mass was added and mixed with stirring to obtain a resin composition. The viscosity of this resin composition was 60 mPa · s.

  About each said resin composition, rust prevention property and electromagnetic wave shielding property were evaluated with the following method. In addition, the antirust test was done about Examples 1-5, 9-13, and Comparative Examples 1-4, and the electromagnetic wave shielding property was done about Examples 6-8, 14-16, and Comparative Examples 5-7.

[Preparation of rust-proof test piece and rust-proof test method]
A steel plate (material SPCC, 1.0 mm × 70 mm × 150 mm) was surface-treated with sand blast (fine: average surface roughness Rz 15 μm), then degreased and washed with 2-propanol, and dried with an air spray gun to a coating thickness of 60 μm. Each resin composition was applied so as to have a film thickness, and allowed to stand for 7 days in an atmosphere of temperature: 25 ° C. and humidity: 55% to form a cured film, which was used as a test piece.

  Each of the above test pieces is a kind of galvanization test and is subjected to a rust prevention test in accordance with an accelerated durability test cast test (JIS H8520) (test temperature: 50 ± 2 ° C., 360 hours). Rust prevention was evaluated by visual observation.

[Measurement of electromagnetic shielding properties]
The electromagnetic shielding properties were measured by Advantest (near electromagnetic field). At this time, the measurement test piece removes dust and dirt on the surface of the plywood (5 mm × 200 mm × 200 mm), and is applied with a resin composition so as to have a coating thickness of 80 μm when dried with an air spray gun. It was left to stand in an atmosphere of 25 ° C. and humidity: 55% for 7 days to form a cured film, which was used as a test piece.

  Tables 1 and 2 below show the blending amount (in mass%) of each component in each resin composition, the electrical resistance value, and the viscosity at 25 ° C. Moreover, the rust prevention test result in each resin composition is shown in following Table 3 and Table 4 with the sclerosis | hardenability of a resin composition. Moreover, it shows in Table 5 about the electromagnetic wave shielding property in each resin composition. Among those measured for electromagnetic shielding properties, the electromagnetic shielding properties when using the resin composition of Example 8 having low electrical resistance are shown in FIG. 1 (electric field) and FIG. 2 (magnetic field).

  These results can be considered as follows. First, it turns out that the thing of Examples 1-5 and 9-13 which satisfy the requirements prescribed | regulated by this invention is exhibiting the outstanding rust prevention property. Moreover, it turns out that the thing of Examples 6-8 and 14-16 is exhibiting the favorable electromagnetic wave shielding property. The results of FIGS. 1 and 2 are measured in the frequency band of 0 Hz to 1 GHz in Example 8 with low electrical resistance, but the shielding effect becomes higher as the frequency band becomes higher. It can be seen that the electric field is -60 dB or more (frequency band of the marker 500 MHz).

It is the graph which measured the shielding effect of the electric field by a resin composition in the wide frequency range. It is the graph which measured the shielding effect of the magnetic field by a resin composition in the wide frequency range.

Claims (6)

  (A) Zn and / or Al formed on the scale-foil fine powder, and (b) Cu and / or Ni formed on the scale-foil fine powder. A resin composition excellent in rust prevention and / or conductivity, characterized in that a fine scale powder is blended with a resin.   Furthermore, the resin composition of Claim 1 which mix | blends the powder or alloy powder of 1 or more types of elements chosen from the group which consists of Mn, Mg, Mo, Li, C, and Ag. The resin is represented by the general formula, R ¹ _N Si (OR ² ) _{4 -N} (wherein R ¹ is a hydrocarbon group having 1 to 10 carbon atoms, R ² is an alkyl group having 1 to 3 carbon atoms, A curable silicone resin comprising a silane compound represented by (2) an acyl group having 2 to 3 carbon atoms or an alkoxyacyl group having 3 to 5 carbon atoms, and N is an integer of 0 to 2, or a partially hydrolyzed condensate thereof. The resin composition according to claim 1 or 2.   Furthermore, the resin composition in any one of Claims 1-3 which contains a metal alkoxide (except Si alkoxide).   Furthermore, the resin composition in any one of Claims 1-3 which contains lithium hydroxide.   The resin composition coating | coated member excellent in the rust prevention property and / or electroconductivity which coat | covers the resin composition of any one of Claims 1-5 on the base-material surface.

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