JPH0913197A - Production of wire net-reinforced glass excellent in corrosion inhibiting property - Google Patents

Abstract

PURPOSE: To obtain a wire net-reinforced glass excellent in corrosion inhibiting property by dipping the wire net-reinforced glass in an electrodepostion bath to form a coating film on the surface of the wire of the exposed wire net and sealing the clearance between the wire net and glass. CONSTITUTION: A cut wire net-reinforced glass is dipped in an electrodeposition bath, a voltage is impressed between the wire net and a counter electrode to apply a current, and electrodeposition coating is conducted. An electrodeposition coating film is formed in this way on the surface of wire of the wire net exposed from the cut surface, an electrodeposition coating film is also formed on the surface of the wire close to the cut end face of glass, and clearance between the glass and the wire net is sealed. A cationic electrodeposition bath is preferably used as the bath, and an electrodeposition bath with an amine- addition epoxy resin as a base resin, etc., are used. In this electrodeposition coating, the inter-electrode voltage is gradually increased to a fixed voltage between 0 and 50 to 400V in 5sec to 5min by a slow-start method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire mesh-containing glass having a cut end surface, by forming an electrodeposition coating film on the exposed metal wire surface of the wire mesh by electrodeposition coating and sealing the gap between the wire mesh and the glass. TECHNICAL FIELD The present invention relates to a method for producing a wire-meshed glass excellent in corrosion resistance, which is characterized by being perforated, and a wire-meshed glass manufactured by this method.

[0002]

2. Description of the Related Art Mainly in large-scale buildings such as high-rise buildings, the window glass is scattered and dropped during a disaster such as an earthquake or fire to prevent damage to humans on the ground. The use of glass is required. However, glass with wire netting, which originally has very favorable characteristics, also suffers from aesthetic deterioration and volume increase, strength decrease due to stress concentration, deterioration of dimensional retention, cracking of glass, etc. when the wire netting rusts. Is likely to fall out of the window frame and fall naturally, leading to a serious accident. The window glass of a large building is often fixedly installed, and in that case, it is necessary to maintain the strength of the glass for a long period of several decades. For this purpose, it is essential to prevent corrosion of the wire mesh of the wire-containing glass. Wire mesh glass,
Generally, a wire mesh woven with a wire mesh is enclosed in glass, and if it is completely encapsulated, the metal mesh cannot rust, but a large plate of glass with wire mesh can be made into a window frame size. When cut together, a cut end is produced. A metal wire of a wire mesh, usually a steel wire is exposed here, and a slight gap between the wire mesh and the glass is also opened. When corrosion-promoting substances such as water, air and salt come into contact with the cut ends, the steel wire is oxidized and rusted. Further, since these corrosion accelerators penetrate inside along the gap between the wire mesh and the glass, rust occurs not only at the cut end but also in the wire mesh at the center of the glass. In order to prevent this rusting, it is necessary to prevent the cut end from rusting and to seal the voids. Conventionally, for this purpose, there is an ability to block corrosion-promoting substances, and a wire mesh and glass Rust prevention treatment is performed by coating a fluororesin-based lacquer that has high permeability to the voids.

However, there are the following problems in the rust preventive treatment by applying a conventional lacquer. 1. Since painting work is done manually by brush painting,
The painting work efficiency is low. In addition, variations in the amount of coating are likely to occur, and if a thin film portion or an uncoated portion occurs, it causes a rust prevention treatment defect. 2. When coating and drying lacquer, a large amount of organic solvent is volatilized into the air and becomes a source of environmental pollution. In addition, lacquer and organic solvent are dangerous substances that are ignitable, and handling is restricted. 3. Since the lacquer coating film has poor adhesion to glass and metal wires, the coating film peels off due to vibration, etc., and corrosion resistance for a long time is not sufficient.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present inventors
There was no problem in the method of applying the conventional lacquer, the rust prevention treatment of the cut end of the wire mesh-containing glass can be efficiently performed, and earnest research was conducted on a method capable of imparting excellent corrosion prevention to the cut wire mesh-containing glass. As a result, they have found that the above object can be achieved by utilizing the electrodeposition coating method, and have completed the present invention.

[0005]

That is, the present invention provides:
Immerse the wire mesh glass with the cut end face in the electrodeposition bath,
A voltage is applied between the wire mesh of the wire mesh glass and the counter electrode to carry out electrodeposition coating, and in the wire mesh glass, an electrodeposition coating film is formed on the metal wire surface of the wire mesh exposed from the glass cutting end face. , A wire mesh with excellent corrosion resistance characterized by forming an electrodeposition coating film on the metal wire surface of the wire mesh sandwiched between the glass and near the glass cutting end face to seal the gap between the glass and the wire mesh A method for manufacturing glass is provided. Further, the present invention provides: It is intended to provide a wire-meshed glass which is manufactured by the above method for manufacturing a wire-meshed glass and has excellent corrosion prevention properties.

[0006]

In the present invention, the cut glass with wire mesh is
The glass with a wire mesh used as a daylighting portion of a window or a door can be used without particular limitation as long as it has a cut end surface. The type of metal wire of the wire mesh of the wire-containing glass is not particularly limited, but steel wire is generally used in terms of cuttability, strength, cost, and the like. It is preferable that all or most of the metal wires of this wire mesh intersect and contact each other to have electrical conductivity.

In the present invention, the electrodeposition bath may be either an anion electrodeposition coating or a cation electrodeposition coating, but in general, a cation type is preferable from the viewpoint of corrosion resistance, and as a base resin for the composition. Is epoxy type, acrylic type,
Although any of polybutadiene-based, alkyd-based, and polyester-based resins can be used, polyamine resins represented by amine-added epoxy resins are preferred.

Examples of the amine-added epoxy resin include (i) an adduct of a polyepoxide compound with a primary mono- and polyamine, a secondary mono- and polyamine or a primary and secondary mixed polyamine (for example, US Pat. 984,299
(Ii) Addition products of polyepoxide compounds with ketiminated secondary mono- and polyamines having primary amino groups (see, for example, US Pat. No. 4,017,438); (iii) ) A reaction product obtained by etherification of a polyepoxide compound and a ketiminized hydroxy compound having a primary amino group (see, for example, JP-A-59-43013).

The polyepoxide compound used for producing the amine-added epoxy resin is a compound having two or more epoxy groups in one molecule, and generally has at least 20.
Those having a number average molecular weight in the range of 0, preferably 400 to 4,000, and more preferably 800 to 2,000 are suitable, and those obtained by the reaction of a polyphenol compound and epichlorohydrin are particularly preferable.

Examples of the polyphenol compound which can be used for forming the polyepoxide compound include bis (4
-Hydroxyphenyl) -2,2-propane, 4,4-
Dihydroxybenzophenone, bis (4-hydroxyphenyl) -1,1-ethane, bis (4-hydroxyphenyl) -1,1-isobutane, bis (4-hydroxy-
tert-butyl-phenyl) -2,2-propane, bis (2-hydroxynaphthyl) methane, 1,5-dihydroxynaphthalene, bis (2,4-dihydroxyphenyl) methane, tetra (4-hydroxyphenyl) -1,
1,2,2-ethane, 4,4-dihydroxydiphenyl sulfone, phenol novolac, cresol novolac and the like can be mentioned.

The polyepoxide compound may be partially reacted with a polyol, a polyether polyol, a polyester polyol, a polyamidoamine, a polycarboxylic acid, a polyisocyanate compound or the like, and further, ε-caprolactone, an acrylic monomer or the like. May be graft-polymerized.

The above-mentioned base resin is externally crosslinkable (that is,
It may be either a type which is crosslinked by the addition of a curing agent) or an internal (or self) crosslinking type, and examples of the curing agent used in the case of an external crosslinking type resin include (block) poly A conventionally known cross-linking agent such as an isocyanate compound or an amino resin can be used, and a blocked polyisocyanate compound is particularly preferable. Further, as the internally crosslinkable resin, a resin containing a blocked polyisocyanate type is suitable.

The blocked isocyanate compound that can be used as a curing agent for the externally crosslinkable resin may be an addition reaction product of a polyisocyanate compound in an approximately theoretical amount and an isocyanate blocking agent. Examples of the polyisocyanate compound include aromatic compounds such as tolylene diisocyanate, xylylene diisocyanate, phenylene diisocyanate, bis (isocyanatomethyl) cyclohexane, tetramethylene diisocyanate, hexamethylene diisocyanate, methylene diisocyanate, and isophorone diisocyanate, alicyclic compounds or aliphatic compounds. Group isocyanate compounds containing a terminal isocyanate group obtained by reacting a low molecular weight active hydrogen-containing compound such as ethylene glycol, propylene glycol, trimethylolpropane, hexanetriol and castor oil to an excess amount of a polyisocyanate compound of the group and these isocyanate compounds. To be

On the other hand, the above-mentioned isocyanate blocking agent is one which blocks by adding to the isocyanate group of the polyisocyanate compound, and the blocked isocyanate compound produced by the addition is stable at room temperature and when heated to about 100 to 200 ° C. It is desirable that the blocking agent can be dissociated to regenerate a free isocyanate group. Examples of the blocking agent satisfying such requirements are lactam compounds such as ε-caprolactam and γ-butyrolactam; methylethylketoxime,
Oxime-based compounds such as cyclohexanone oxime; phenol-based compounds such as phenol, para-t-butylphenol and cresol; aliphatic alcohols such as n-butanol and 2-ethylhexanol; aromatics such as phenylcarbinol and methylphenylcarbinol Alkyl alcohols; ether alcohol compounds such as ethylene glycol monobutyl ether and the like can be mentioned.

Of these, the oxime-based and lactam-based blocking agents are blocking agents that dissociate at a relatively low temperature, and therefore are particularly preferable from the viewpoint of curability of the electrodeposition coating composition. As a method of introducing a blocked isocyanate group into a base resin in a self-crosslinking type having a blocked isocyanate group in a base resin molecule, a conventionally known method can be used, for example, a free isocyanate group in a partially blocked polyisocyanate compound. It can be introduced by reacting the active hydrogen-containing part in the base resin.

In the case of a cationic resin, water-solubilization or water-dispersion of the base resin is usually carried out by neutralizing the resin with a water-soluble organic acid such as formic acid, acetic acid or lactic acid to make it water-soluble or water-dispersible. In the case of anionic resins, neutralization with an alkali such as amine or alkali metal hydroxide instead of a water-soluble organic acid, and then water-solubilization and water-dispersion You can

In the electrodeposition coating composition used in the present invention, if necessary, pigments such as coloring pigments, rust preventive pigments and extender pigments, organic solvents, pigment dispersants, coating surface adjusting agents, curing catalysts, etc. Paint additives can be blended. When the above electrodeposition coating composition uses a blocked polyisocyanate as a cross-linking agent or is a blocked isocyanate type internal cross-linking resin, an organotin compound can be added as a curing catalyst. Examples of the organic tin compound include organic tin oxides such as dibutyltin oxide and dioctyltin oxide; dibutyltin dilaurate, dioctyltin diacetate, dioctyltin benzoate oxy, dibutyltin benzoate oxy, dioctyltin dibenzoate, dibutyltin dibenzoate. Examples thereof include alkyltin compounds of aliphatic or aromatic carboxylic acids. The compounding amount and the compounding method of the organotin compound can be the same as those generally used in the past.

In the method of the present invention, the electrodeposition bath is generally
It is diluted with deionized water or the like so that the solid content concentration becomes about 6 to 40% by weight, and the pH is adjusted within the range of 5.0 to 9.0, and the bath temperature is usually adjusted to 15 to 40 ° C. It is preferable to use.

When the electrodeposition bath is of a cation type, the metal wire of the wire mesh exposed from the glass cutting end surface of the wire mesh-containing glass (having electrical conductivity by intersecting with other metal wires and contacting each other) Metal wire) to the cathode, while if the electrodeposition bath is anionic, connect the anode to the exposed metal wire,
It suffices to apply a voltage between the respective counter electrodes and energize them to carry out electrodeposition coating.

A case where an isolated metal wire (hereinafter, abbreviated as "isolated streak") which does not intersect with other metal wires and has no electrical conductivity is generated in the metal wire of the wire mesh of the glass with wire mesh. However, these isolated streaks are generated in the corners of the glass plate, and in many cases, they are hidden by a frame such as a window frame. However, practical problems in terms of strength and the like hardly occur. If this isolated muscle is also desired to be electrodeposited, the isolated muscle is electrically connected to the isolated muscle by using both crocodile connecting wires during electrodeposition coating. Should have conductivity. The isolated streaks may be coated by a method other than electrodeposition coating, such as a brush coating method.

In the method of the present invention, the wire-meshed glass is immersed in an electrodeposition bath, and an electrode is provided at one location (two or more locations) of the electrically conductive metal wire of the wire-meshed glass. By connecting, applying voltage and energizing to perform electrodeposition coating, all metal wires that have electrical conductivity are electrodeposited on the metal wire surface of the wire mesh exposed from the cut end face of glass. It is possible to form an electrodeposition coating film on the metal wire surface of the wire mesh that is sandwiched between the glass and near the glass cutting end face by the throwing action of the electrodeposition paint (action that penetrates into the inside) to form the glass and the wire mesh. The voids can be sealed.

Therefore, a predetermined electrodeposition coating film can be formed on a desired portion of the metal wire of the wire mesh which is immersed in the electrodeposition bath and has electrical conductivity, which results in a rustproofing defect. It is possible to prevent the uncoated portion and the generation of a thin film portion. Further, since a large number of parts can be coated at the same time, the work efficiency is significantly improved as compared with the conventional manual work as the wire mesh-containing glass becomes larger and the metal wires exposed at the ends increase.

In the method of the present invention, an electrodeposition coating film is formed on the metal wire surface of the wire mesh exposed from the glass cutting end surface, and electrodeposition is performed on the metal wire surface of the wire mesh sandwiched between the glass and near the glass cutting end surface. It is necessary to form a coating film to seal the gap between the glass and the wire mesh. In order to seal the gap between the glass and the wire net, the electrodeposition paint invades into this gap, and an electrodeposition coating film is formed as much as possible from the glass cutting end face to the inside void portion to seal it. It is preferable. It is suitable to form an electrodeposition coating film in a space up to at least 2 mm, preferably at least 3 mm, and more preferably 3 to 20 mm inside the glass cut end face for sealing. By sealing, it is possible to prevent corrosive substances from entering the voids inside the glass and prevent the corrosion of the wire mesh inside the glass.

In order to sufficiently perform the above-mentioned sealing, it is important to set the coating conditions. If a high voltage is applied in the early stage of electrodeposition coating, the entrance portion to the void may be immediately closed, and the coating film may not be sufficiently formed inside the void so that the sealing may not be sufficiently performed. Although electrodeposition can be performed at a low voltage from the initial stage to the end of electrodeposition, it often takes a long time to reach a predetermined film thickness at a low voltage, which tends to deteriorate productivity.

Therefore, it is preferable that the electrodeposition coating is carried out at a low voltage in the initial stage of the coating, and a slow start method in which the applied voltage is gradually increased is used to level the deposition of the coating film and shorten the coating time. By applying a low voltage at the initial stage of coating, it becomes easier for the electrodeposition coating to penetrate into internal voids, and by gradually increasing the applied voltage, the film thickness can be efficiently increased. Further, in order to increase the film thickness as necessary, the film thickness can be increased by electrodeposition with the reached constant voltage for a certain period of time after the above step of gradually increasing the applied voltage. Suitable energization conditions include, for example, a method of gradually increasing the voltage between the electrodes from 0 V to a constant voltage in the range of 50 to 400 V over 5 seconds to 5 minutes, and next to this method, in the range of 50 to 400 V reached. A method of energizing at a constant voltage for usually 5 minutes or less can be mentioned.

The film thickness of the electrodeposition coating film is not particularly limited, but in general, it is preferably within a range of 2 to 50 μm on the metal wire surface portion of the wire net exposed from the glass cutting end face. The baking of the coating film is not always necessary,
You can do it as needed. The baking temperature for baking is generally suitable within the range of 80 to 200 ° C.

[0027]

According to the method of the present invention, the electrodeposition coating film is formed on the metal wire surface of the wire mesh exposed from the wire mesh glass cutting end surface of the wire mesh-containing glass by electrodeposition coating, and is sandwiched between the glass and the glass cutting end surface. It is possible to form an electrodeposition coating film on the surface of the metal wire of the wire mesh in the vicinity of to seal the gap between the glass and the wire mesh. Compared with the conventional method of applying lacquer because it is electrodeposition coating, it has the advantages of higher coating work efficiency, less variation in the coating film thickness, and no uncoated portion left at the intended location. Further, the electrodeposition coating material is a water-based, non-dangerous material, and has the advantage that there is no problem of environmental pollution due to volatilization of the organic solvent in conventional lacquer coating, and there is no restriction due to being a hazardous material. By the method of the present invention, an electrodeposition coating film having good corrosion resistance can be formed on the metal wire surface of the exposed wire mesh of the wire mesh-containing glass having a cut end face, and the gap between the glass and the wire mesh is sealed with the electrodeposition coating film having good corrosion resistance. Therefore, the glass with a wire mesh produced can have excellent corrosion resistance.

[0028]

The present invention will be described more specifically with reference to the following examples. Hereinafter, both “parts” and “%” are based on weight.

Production Example 1 1,900 parts of Epikote 1004 (* 1) was dissolved in 1,012 parts of butyl cellosolve, 124 parts of diethylamine was added dropwise at 80 to 100 ° C., and then maintained at 120 ° C. for 2 hours,
An epoxy resin-amine adduct having an amine number of 47 was obtained.

Next, 1,000 parts of a dimer acid type polyamide resin having a amine value of 100 [trade name "Versamide 460", manufactured by Henkel Hakusui Co., Ltd.] was dissolved in 429 parts of methyl isobutyl ketone and heated to reflux at 130 to 150 ° C. Then, the produced water was distilled off to change the terminal amino group of the amide resin to ketimine. This is kept at 150 ° C. for about 3 hours and cooled to 60 ° C. after the distillation of water is stopped. Then add this to the epoxy resin-amine adduct and add 1
Heat to 00 ° C, hold for 1 hour, then cool to room temperature to give a solid content of 6
A varnish of epoxy resin-amino-polyamide addition resin with 8% and an amine value of 65 was obtained.

103 parts of the varnish obtained above (70 parts by solid content of resin), 30 parts of 2-ethylhexyl alcohol blocked product of xylylene diisocyanate (by solid content), 1
After mixing 15 parts of 0% acetic acid and stirring uniformly, 150 parts of deionized water was added dropwise over about 15 minutes while stirring vigorously to obtain a clear emulsion for cationic electrodeposition having a solid content of 33.6%.

Separately, 14 parts of titanium white, 10 parts of refined clay, 1 part of carbon black, 1 part of basic lead silicate, 3 parts of dioctyltin oxide and 3 parts of deionized water are added to 5 parts of an epoxy pigment dispersion resin solution having a solid content of 80%. 35.7 parts were mixed and dispersed to obtain a pigment paste.

To 298 parts of the above clear emulsion, 69.7 parts of the above pigment paste and deionized water were added with stirring and mixed to obtain a cationic electrodeposition coating composition having a solid content of about 20%.

(* 1) Epicoat 1004: Bisphenol A type epoxy resin having an epoxy equivalent of about 950, manufactured by Yuka Shell Epoxy Co., Ltd.

Production Example 2 3.02 parts of dioctyltin oxide and 0.52 parts of an epoxy pigment dispersion resin solution having a solid content of 80% and deionized water 3.
7 parts were mixed and dispersed to obtain a catalyst paste. 7.22 parts of this catalyst paste and deionized water were added to 298 parts of a cationic electrodeposition clear emulsion having a solid content of 33.6% obtained in Production Example 1 with stirring, and mixed to obtain a cationic type having a solid content of about 20%. I got the electrodeposition paint clear.

Production Example 3 Using a polybutadiene-based acidic resin as a resin component, a pigment content based on 100 parts of the resin solid content was mixed with 17 parts of titanium white, 10 parts of refined clay, 1 part of carbon black, and 1 part of basic lead silicate. Except that the solid content is 20 in the same manner as in Production Example 1.
% Of anionic electrocoating was obtained.

Example 1 The diameter of the metal wire of the wire mesh is 0.5 mm, the glass thickness is 8 mm,
A metal wire of a wire-meshed glass (having about 70 exposed portions of the metal wire of the wire mesh) having a metal mesh grid having a side of 2 cm and a cut end surface without any isolated streak was connected to the cathode, and Production Example 1 The cationic electrodeposition coating composition obtained in 1. was maintained at 30 ° C., the above wire mesh-containing glass was immersed in this, and a voltage was applied between the glass and the counter electrode to perform electrodeposition coating. The electrodeposition coating was carried out under the condition that the initial applied voltage was 0 V, the applied voltage was gradually increased to 150 V over 30 seconds, and then the current was applied at 150 V for another 150 seconds. After coating, the coating material was washed with water to remove excess adherent coating material, and further baked at 170 ° C. for 30 minutes to cure.
The coating film thickness on the metal wire of the exposed wire mesh was about 20 μm. In addition, a coating film was formed and sealed up to a gap about 8 mm from the cut end face of the glass.

Example 2 The procedure of Example 1 was repeated, except that after washing with water to remove excess adherent paint, air-drying was performed without baking. The coating film thickness on the metal wire of the exposed wire mesh is about 20μ
m. In addition, a coating film was formed and sealed up to a gap about 8 mm from the cut end face of the glass.

Example 3 An electrodeposition cured coating film was formed in the same manner as in Example 1 except that the energization condition in the electrodeposition coating was 50 V for 3 minutes. The coating film thickness on the metal wire of the exposed wire mesh was about 3 μm. In addition, a coating film was formed and sealed up to a void about 2 mm from the cut end face of the glass.

Example 4 An electrodeposition cured coating film was formed in the same manner as in Example 1 except that the applied voltage in the electrodeposition coating was 100 V for 3 minutes. The coating film thickness on the metal wire of the exposed wire mesh was about 10 μm. In addition, a coating film was formed and sealed up to a gap about 5 mm from the cut end face of the glass.

Example 5 In Example 1, as the electrodeposition bath used for electrodeposition coating, the cationic electrodeposition coating clear obtained in Production Example 2 was used instead of the cationic type electrodeposition coating obtained in Production Example 1. An electrodeposition cured coating film was formed in the same manner as in Example 1 except for the above. The coating film thickness on the metal wire of the exposed wire mesh was about 20 μm. In addition, a coating film was formed and sealed up to a gap about 8 mm from the cut end face of the glass.

Example 6 In Example 1, the diameter of the metal wire of the wire mesh is 0.5 mm,
A metal having a glass thickness of 8 mm, a wire mesh lattice size of 2 cm on a side, and having isolated streaks as the wire mesh-containing glass and having a cut end face, and having the cross-continuity of the wire mesh-containing glass and having conductivity. An electrodeposition cured coating film was formed in the same manner as in Example 1 except that the wire was connected to the cathode and the isolated streak was connected to the above-mentioned conductive metal wire using both crocodile connection wires. The coating thickness on the metal wire of the exposed wire mesh is about 20
μm. In addition, a coating film was formed and sealed up to a gap about 8 mm from the cut end face of the glass.

Example 7 A metal wire of wire-meshed glass having no cuts and no isolated streaks was connected to the cathode, and the anionic electrocoating material obtained in Production Example 3 was kept at 30 ° C., in which the wire-meshed material was contained. The glass was dipped and a voltage was applied between it and the counter electrode to perform electrodeposition coating. The initial electrodeposition coating is 0 V, the applied voltage is gradually increased to 150 V over 30 seconds, and then 150 V is applied for another 15 V.
It was carried out under the condition that electricity was applied for 0 seconds. After coating, the coating material was washed with water to remove excess coating material and air-dried. The coating film thickness on the metal wire of the exposed wire mesh was about 20 μm. In addition, a coating film was formed and sealed up to a gap about 5 mm from the cut end face of the glass.

Comparative Example 1 Comparative Example 1 was the glass with wire mesh itself, which was used in Example 1 and which had no rust-preventive treatment and had a cut end face without isolated streaks.

COMPARATIVE EXAMPLE 2 The metal wire of the exposed wire mesh of the wire mesh-containing glass having no cut lines and having no isolated streak used in Example 1 was brushed with a fluororesin-based lacquer to a dry film thickness of about 100 μm. Comparative Example 2 was air-dried.

Test Method The following corrosion resistance test was performed on the wire mesh-containing glass having the cut end surface, which was obtained in Examples 1 to 7 and Comparative Examples 1 and 2 with or without anticorrosion treatment. went. The test results are shown in Table 1 below.

Corrosion resistance test: (salt spray test according to JIS Z-2371 for 24 hours and then room temperature drying 24
A corrosion resistance test was conducted with one cycle of a process of performing time). After 1, 5 and 10 cycles, the number of rusted metal wires, the average distance of rust from the end face to the inside of the rusted metal wire, the degree of rust juice, and the number of cracks formed on the glass are evaluated. The degree of rust is evaluated according to the following criteria. ◯: No change was observed Δ: Fine rust flow traces were found X: Significant rust flow traces were seen XX: The entire surface was covered with rust

[0048]

[Table 1]

In Table 1, those marked with "*" in the column of the average reach of rust from the end face are those in which rust was generated immediately in front of the coating film that had penetrated into the voids.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takahisa Kasukawa 4-17-1, Higashi-Hachiman, Hiratsuka-shi, Kanagawa Kansai Paint Co., Ltd. (72) Hidehiko Haneishi 4--17-1, Higashi-Hachiman, Hiratsuka, Kanagawa West Paint Co., Ltd.

Claims (6)

[Claims] 1. A wire-meshed glass having a cut end face is immersed in an electrodeposition bath, and a voltage is applied between the wire mesh and the counter electrode of the wire-meshed glass to energize for electrodeposition coating. , Forming an electrodeposition coating film on the metal wire surface of the wire mesh exposed from the glass cutting end surface, and forming an electrodeposition coating film on the metal wire surface of the wire mesh sandwiched between the glass and near the glass cutting end surface A method for producing glass with wire mesh, which is excellent in corrosion prevention, characterized by sealing a gap with the wire mesh. 2. The method according to claim 1, wherein the electrodeposition bath is a cationic electrodeposition bath, and the electrodeposition coating film is formed by cationic electrodeposition coating. 3. The production method according to claim 2, wherein the cationic electrodeposition bath is an electrodeposition bath using an amine-added epoxy resin as a base resin. 4. A step of gradually increasing the current-carrying condition in the electrodeposition coating from a voltage between electrodes of 0 V to a constant voltage in the range of 50 to 400 V by a slow start method for 5 seconds to 5 minutes, and then, if necessary. The method according to claim 1, 2 or 3, further comprising the step of energizing at a constant voltage. 5. The production method according to claim 1, wherein the electrodeposition coating film is formed by electrodeposition coating and then cured by heating at 80 to 200 ° C. 6. A wire mesh-containing glass which is manufactured by the manufacturing method according to any one of claims 1 to 5 and has excellent corrosion prevention properties.