JP2000017289A - Composition for peeling vitreous coating and method for peeling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composition for peeling a vitreous film and a method for peeling the vitreous film from a substrate safely, reliably, simply and in a short time without eroding an organic substrate. provide. SOLUTION: An aqueous solution or a hydrophilic gel containing ammonium acid fluoride is brought into contact with a vitreous film formed on an organic substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vitreous film formed on an organic base material such as a painted surface of an automobile, particularly, a vitreous film in which a semiconductor photocatalyst such as titanium oxide is dispersed. The present invention relates to a stripping composition and a stripping method for reliably and simply stripping in a short time.

[0002]

2. Description of the Related Art A glassy coating formed for protection, corrosion protection, aesthetics preservation, dirt prevention, etc. on a painted surface of an automobile, a plastic or rubber member, a film or a sheet or the like. As a method of peeling from the surface, a mechanical or physical polishing method and a chemical corrosion method are known. Mechanical or physical polishing method, silica particles, hard inorganic fine particles such as corundum particles alone, a liquid in which the inorganic fine particles are dispersed, or covering the coating with water-resistant abrasive paper, etc., sliding the coating surface with these,
The vitreous film is scraped off by polishing or sliding and polishing the surface of the film with hard fibers such as steel wool.

[0003] On the other hand, the chemical erosion method is, as has been known for a long time, a method in which hydrofluoric acid (hydrofluoric acid) as an etchant is brought into contact with a glass surface to perform etching. Other etchants used in this method include mixed aqueous solutions of hydrofluoric acid and ammonium fluoride [Glass Handbook (September 3, 1975)
0, pp. 471 of Asakura Shoten) or a mixed acid of hydrofluoric acid and sulfuric acid, hydrochloric acid or nitric acid [Practical Surface Modification Technology List (March 25, 1993, edited by Materials Technology Research Association) 353]
Page].

[0004]

However, if the above-mentioned mechanical or physical polishing method is used for peeling the vitreous coating from the organic base material as described above, when the vitreous coating is scraped off, Since the organic base material that is softer than the base material is also scraped away, it is extremely difficult to remove only the vitreous coating without damaging the base material.

On the other hand, when the above-mentioned chemical erosion method is used, the hydrofluoric acid, which is a basic component of the etching solution, has a strong corrosive property and an erosive property with respect to the vitreous material. Although it can perform the desired etching in a short time, it is also corrosive and erosive to the human body, so it is necessary to wear goggles, rubber gloves, and other protective equipment to perform the work safely. In addition, the treatment of waste liquid (neutralization with slaked lime) requires an exhaust system, and is not a safe and simple method [Glass Dictionary (September 20, 1985)
Sun, Asakura Shoten) 315 pages. Moreover, in this method, especially when the thin glassy film is peeled, unless the contact time between the hydrofluoric acid and the glassy film is extremely short, the organic base material under the film may be corroded or eroded. There is. This tendency is even stronger when the organic substrate is a painted surface containing an inorganic pigment in particular, and important properties such as gloss of the painted surface are often reduced by contact with hydrofluoric acid.

Accordingly, there has been a demand for a release composition capable of safely, reliably, simply, and in a sufficiently short time, removing a vitreous film formed on an organic substrate, particularly a thin vitreous film, from the substrate. Therefore, an object of the present invention is to provide a composition for peeling a vitreous film and a method for peeling the vitreous film from a substrate safely, reliably, simply, and in a short time without eroding an organic substrate. That is.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a vitreous film formed on an organic base material containing ammonium acid fluoride (ammonium hydrogen fluoride) and water. A stripping composition. The composition for stripping may be composed of an aqueous solution of acidic ammonium fluoride, or may be a hydrophilic gel gelled with a hydrophilic gelling agent. The stripping composition of the present invention preferably further contains a surfactant. The present invention also provides a method for peeling a vitreous film from an organic substrate, comprising contacting the above-mentioned composition for peeling with a vitreous film formed on an organic substrate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Stripping composition The stripping composition of the present invention basically comprises ammonium acid fluoride and water. Thus, this basic composition is an aqueous ammonium acid fluoride solution. This ammonium ammonium fluoride has the action of moderately corroding and eroding the vitreous material without eroding the organic base material, but requires exhaust equipment that does not require the wearing of protective equipment when working on the human body. It is much safer and easier to use than conventional hydrofluoric acid. Regarding safety, KIRK-OTHM
ENCYCLOPEDIA OF CHEMI of ER
CALTECHNOLOGY THIRD EDITI
ON VOLUME 10, page 676, states that even if ammonium acid fluoride adheres to the skin, it can be completely removed by washing with a weak alkaline soap. The concentration of ammonium acid fluoride is preferably 0.1 to 80% by weight, more preferably 1 to 40% by weight to give good results. Although the composition of the present invention does not contain any hydrofluoric acid, a vitreous film, particularly a thin vitreous film, can be reliably peeled off within a sufficiently short time for practical use.

In the composition of the present invention, water is used for dissolving and diluting ammonium acid fluoride as a main component to prepare an aqueous solution. As such solvent water, ordinary tap water, well water and the like can be used without any problem in addition to distilled water and ion-exchanged water. In order to impart desired viscosity characteristics and improve workability, a hydrophilic gelling agent having an action such as gelling, thickening, and rheology may be added to the composition of the present invention. When a hydrophilic gelling agent is added to the aqueous acidic ammonium fluoride solution, it gels to obtain a hydrophilic gel. This hydrophilic gel, as described below,
It may be used as it is, or it may be coated and laminated on a soft film or sheet to form a sheet composite (hereinafter, referred to as a gel sheet) and used as a gel sheet. In addition, the gel sheet may be a roll-shaped roll via a release film.

As the hydrophilic gelling agent, gum arabic,
Natural water-soluble gums such as locust bean gum, guar gum, karaya gum, xanthan gum, welan gum, ramzan gum, gellan gum, fermented gum; bentonite, natural hectorite, synthetic hectorite, natural smectite,
And hydrophilic clay minerals such as synthetic smectite as inorganic gel; natural water-soluble polymers such as glue, starch, pectic acid, agar, gelatin, galactomannan, nitrocellulose, methylcellulose, hydroxymethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose; Polyvinyl alcohol, polyacrylamide, polyhydroxystyrene, synthetic water-soluble cellulose (eg, polyoxyethylene-modified cellulose)
And the like. The above hydrophilic gelling agents can be used alone or in combination of two or more. The addition amount of these hydrophilic gelling agents is preferably 0.001 to 20% by weight, and more preferably 0.01 to 5% by weight.
% By weight.

It is preferable that a surfactant is further added to the composition of the present invention. Surfactants are used for the ammonium acid fluoride and the composition for the surface of the glassy coating even if the surface of the glassy coating to be peeled is not hydrophilic, and whether the composition is an aqueous solution or a hydrophilic gel. It has the effect of promoting the wetting of objects, increasing the chance of contact between ammonium acid fluoride and the vitreous film, that is, improving the contact efficiency between ammonium acid fluoride and the vitreous film, and increasing the corrosion / erosion rate. Therefore, the peeling treatment can be performed more reliably in a shorter time. As such a surfactant, an anionic, cationic, nonionic or amphoteric surfactant generally used in an aqueous system can be used.

Examples of the anionic surfactant include an alkylbenzene sulfonate, an α-olefin sulfonate, an alkane sulfonate, an alkyl sulfate, an alkyl polyoxyethylene sulfate, an alkyl phosphate, a long-chain fatty acid salt, and an α-sulfo salt. Fatty acid ester salts and the like, as a cationic surfactant, alkyl trimethyl ammonium salt,
Dialkyldimethylammonium salts, alkyldimethylbenzylammonium salts and the like; nonionic surfactants such as alkyl polyoxyethylene ethers, fatty acid diethanolamides and alkyl glycosides; and amphoteric surfactants such as dimethylalkylamine oxide and N -Alkyl betaines, imidazoline derivatives and the like.

[0013] Other anionic, cationic, nonionic or amphoteric surfactants include fluorine surfactants. Examples of anionic fluorine surfactants include perfluoroalkyl sulfonates and perfluoroalkyl phosphates, and examples of cationic fluorine surfactants include perfluoroalkyltrimethylammonium salts and nonionic surfactants. Examples of the fluorinated surfactant include perfluoroalkylamine oxide, perfluoroalkylethylene oxide adduct, and perfluoroalkyl-containing oligomer. Examples of the amphoteric fluorinated surfactant include perfluoroalkylbetaine. These surfactants can be used alone or in combination of two or more. The addition amount of these surfactants is preferably 0.001 to 5% by weight, and more preferably 0.01 to 1% by weight.

In the case of the composition containing a surfactant as described above, various inorganic and organic builders can be added in order to further enhance the effect of the surfactant. The composition of the present invention may contain various fragrances for imparting an odor and various pigments for giving a color or the like, if necessary. Further, various bactericides and preservatives can be added.

Stripping Method The stripping method of the present invention is carried out by bringing the above-mentioned stripping composition into contact with a vitreous film formed on an organic base material and separating the vitreous film from the base material. Will be
Specifically, when the release composition is an aqueous solution, the aqueous solution (hereinafter, referred to as an aqueous release agent solution) is sprayed with an air gun,
It is applied to the surface of the desired area of the vitreous film to be peeled off using a hand spray, an aerosol, or the like. In this case, in order to perform peeling more easily and in a shorter time, the coated surface is covered with a soft film impermeable to water vapor to suppress evaporation of water and increase the contact time between the vitreous film and the releasing agent. be able to. Alternatively, the surface of the desired area of the vitreous coating is wiped with a nonwoven fabric, a soft foam (for example, a sponge, a flexible polyurethane foam) or the like impregnated with a release agent aqueous solution in order to perform the release more easily and in a shorter time, that is, pressing. It may be rubbed and applied.
In addition, using a flexible foam having appropriate pores, disposing a flexible foam at the outlet of a container containing an aqueous release agent under or without pressurizing, and using the internal pressure of the container, or using the outlet Using the pressure of the natural falling of the liquid, the release agent aqueous solution is controlled so as to leach through the pores at an appropriate speed, and the surface of the desired area of the vitreous film is wiped with the flexible foam. Rubbing while pressing.

As another peeling method of the present invention, there is a method using a hydrophilic gel. As described above, the hydrophilic gel is obtained by adding a hydrophilic gelling agent to an aqueous release agent solution and gelling the same. The peeling method using the hydrophilic gel may be performed by directly applying or discharging the surface of the desired region of the vitreous film, or, as described above, previously applying the hydrophilic gel to a soft sheet or film. Alternatively, the gel sheet may be formed by laminating a gel sheet, contacting and attaching the gel sheet to the surface of the desired area, and peeling off the gel sheet after an appropriate time has elapsed. In the case of the latter method, it is convenient that the gel sheet is formed into a roll-shaped roll via a release film, and the roll is returned and cut to a required size when used.

In any of the methods, the vitreous film is separated from the organic substrate by the reaction between the acidic ammonium fluoride in the composition and the vitreous material (to form ammonium silicofluoride). After the vitreous film is peeled off as described above, the release agent remaining on the surface of the film and / or ammonium silicofluoride produced by the reaction between the vitreous material and the release agent is impregnated with running water or water. What is necessary is just to wipe with a nonwoven fabric.

Next, a vitreous film to be subjected to a peeling treatment in the present invention will be described. The glassy coatings covered by the present invention are oxide glass coatings or coatings based on oxide glass. As the oxide glass, silicon oxide (SiO ₂ ), boron oxide (B ₂ O ₃ ), phosphorus oxide (P ₂
O ₃ ), arsenic oxide (As ₂ O ₅ , As ₂ O ₃ ), germanium oxide (GeO ₂ ), antimony oxide (Sb ₂ O ₃ ), zirconium oxide (ZrO ₂ ), and the like. Preferable examples of the above oxide glass include silicate glass containing silicon dioxide (silica) in an amount of 5% by weight or more, such as silicate glass (main component SiO ₂ ) and alkali silicate glass (main component SiO ₂ -K _2).
O-Na ₂ O), soda lime glass (main component SiO ₂ -N
a ₂ O-CaO), potash lime glass (the main component SiO ₂ -K
₂ O-CaO), lead (alkali) glass (main component SiO ₂ )
-PbO-Na ₂ O), barium glass (main component SiO ₂₎
-BaO), borosilicate glass (main component SiO ₂ -B ₂ O ₃₎
-Na ₂ O), aluminosilicate glass (main component SiO ₂ -A)
l ₂ O ₃ ) and mixtures thereof.

The vitreous coating may contain an inorganic substance and / or an organic substance in addition to the oxide glass. In this case, even if the oxide glass forms a continuous layer (the sea portion in the sea / island concept referred to in the technical fields such as alloys and polymer alloys) among the components constituting the coating, or Discontinuous layer (island part in the same sea / island concept)
May be configured. For example, if the coating consists of particles and a binder that fills the gaps, the oxide glass may be present as particles or as a binder in the coating.

As the inorganic substance, titanium oxide fine particles (particularly, anatase type semiconductor titanium oxide fine particles) or zinc oxide, silicon carbide, silicon nitride, boron nitride, aluminum nitride, etc., and as the organic substance, polystyrene, polymethacrylic, etc. Colloidal particles such as methyl acrylate and polyvinyl chloride (as a discontinuous layer for film formation), silicone resin and methacrylic resin (as a continuous layer for film formation)
And the like.

The thickness of the vitreous film as described above is not particularly limited, but a relatively thin film is preferable. Specifically, this film thickness is usually 1 nm (0.001 μm) to 10 nm.
0 μm, preferably 1 nm (0.001 μm) to 10 μm
m. The vitreous film is usually formed on an organic substrate by vacuum evaporation (electron beam evaporation), molecular beam epitaxy (MBE), sputtering ring, ion evaporation, laser ablation, sol-gel coating, It is formed by a method such as the LB method.

An example of a method for forming a vitreous film will be described with reference to sol-gel coating. In this method, an alcohol solution of a hydrolyzate of a silicate derivative such as a tetraalkoxysilane, trialkoxyalkylsilane, or dialkoxydialkylsilane is applied to an organic substrate, and the dehydration / dealcoholization reaction proceeds. As a result, a silica-based glassy film is formed. If necessary, a dispersion in which other metal oxide particles having a specific function with respect to the hydrolyzate of the silicate derivative are dispersed is coated on an organic base material, and the dehydration condensation reaction proceeds in the same manner to form a similar vitreous material. A coating can also be formed. When the metal oxide is anatase type semiconductor titanium oxide fine particles,
Titanium oxide expresses a photo-oxidation catalytic function, while a hydrolyzate of a silicate derivative functions as a vitreous binder for titanium oxide particles in the course of a dehydration condensation reaction, and a continuous film containing a semiconductor photocatalyst having an appropriate film strength is formed. It is formed.

As another method of forming a vitreous film, a method of forming a silicon dioxide (silica) film by applying a non-aqueous solvent solution of polysilazane to an organic substrate and reacting with oxygen and water in the air. There is. In any of the forming methods, as a coating method, a dip method, a roll method, a spray method, a spin coating method, a brush coating method, a sander method using a sander equipped with a soft buff, or the like can be used.
The vitreous film may have a two-layer structure of different types.

On the other hand, as an organic base material for forming the above-mentioned vitreous film on the surface, a coated surface of various organic paints;
Examples thereof include a plastic or rubber member, a film or a sheet, and the like. The types of paint that make up the painted surface include vinyl resin paint, alkyd resin paint, aminoalkyd resin paint, unsaturated polyester resin paint, polyurethane resin paint, thermosetting acrylic resin paint, polyvinyl alcohol, and water-soluble cellulose. A conductive resin paint is used. The materials to be coated include nonmetals such as concrete and wood, and various metal materials that have been subjected to various anticorrosion treatments or not. In this case, as the anticorrosion treatment, electroplating, metallikon (metal spraying), zinc plating, ceramic coating (enamelling), cathodic protection (cathodic protection), lining, and the like are used.

The plastic or rubber used for the plastic or rubber member, the film or the sheet includes ABS (acrylonitrile-butadiene-ABS).
Styrene) resin, ACS (chlorinated polyethylene-acrylonitrile-styrene copolymer) resin, alkyd resin,
Amino resin, ASA (acrylate-styrene-
(Acrylonitrile copolymer) resin, bismaleimide triazine resin, cellulose plastic, chlorinated polyether, chlorinated polyethylene, allyl resin such as polyarylate, epoxy resin, ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer Coalescence, ethylene-vinyl chloride copolymer, EVA (ethylene-vinyl acetate copolymer) resin, FRP (glass fiber reinforced plastic),
Fluorine resin, furan resin, ionomer resin, liquid crystal plastic, methacryl-styrene copolymer, nitrile resin, aromatic polyester, olefin-vinyl alcohol copolymer, petroleum resin, phenol resin, polyacetal, polyamide such as polyamide 46, reinforced Polyamide, polyamide imide, polyallyl sulfone, polybenzimidazole, polybutadiene, polybutylene, polybutylene terephthalate, polycarbonate, modified polycarbonate, polyetherketone, polyetherimide, polyethernitrile, polyethersulfone,
Polythioether sulfone, polyethylene (low density polyethylene, high density polyethylene, linear low density polyethylene, water crosslinked polyethylene, etc.), polyethylene terephthalate, polyimide, thermoplastic polyimide, polyketone, acrylic resin, methacrylic resin, polymethylpentene, modified polyolefin, Transparent polyolefin, polypropylene, polyphenylene ether, polyphenylene sulfide, polysulfone, polystyrene, SAN (styrene-acrylonitrile copolymer) resin, butadiene-
Styrene copolymer, polyurethane, polyvinyl acetal, polyvinyl alcohol, polyvinyl chloride, acrylic-modified polyvinyl chloride, thermoplastic elastomer, silicone, unsaturated polyester resin, vinyl ester epoxy resin, polyvinyl acetate, xylene resin, etc. .

[0026]

EXAMPLE 1 Film formation example 1 An ethanol aqueous solution containing a partial hydrolyzate of ethyl silicate at a solid content of 5% by weight (including an acid catalyst) was applied to the coated surface of an iron plate coated with polyester melamine as an organic base material. It was applied by spin coating (1500 RPM, 15 seconds), air-dried for 5 minutes, and dried by heating in a thermostat at 100 ° C. for 60 minutes to form a silica-based glassy film having a thickness of 0.5 μm on the surface of the organic base material. .

Film forming example 2 Partial hydrolyzate of titanium dioxide fine particles and silicon dioxide as a binder (mixing ratio between titanium dioxide and silicon dioxide after film formation, ie, weight ratio as solid content is 1: 1) Alcoholic dispersion (ST-KO)
3, Ishihara Sangyo Co., Ltd., solid content concentration 10%) was diluted with ethanol to prepare a dispersion having a solid content concentration of 5%. After impregnating the dispersion with the above-mentioned buff of a double action type polisher (Toshiba random sander manufactured by Shibaura Seisakusho Co., Ltd.) equipped with a buff made of a flexible polyurethane foam, the organic base obtained in the film formation example-2 with this buff is used. The material was applied while sliding on the glassy coating surface (which would be an intermediate layer of the resulting glassy coating). After air-drying for 5 minutes, 3
It was applied for 0 minutes and dried by heating to form a silica-based vitreous coating having a thickness of 0.1 μm (to be a surface layer of the obtained vitreous coating), thereby obtaining a two-layer silica-based vitreous coating.

Coating Forming Example 3 A polysilazane coating solution (20 wt% dibutyl ether solution, N320 grade, manufactured by Tonen Co.) was applied as an organic base material on a polycarbonate resin sheet by a flow coating method, and air-dried for one week. A 1 μm silica-based vitreous coating was obtained.

Comparative Example 1 20% of hydrofluoric acid contained in a polyethylene container
The aqueous solution was dropped and cast on the vitreous film obtained in Film Forming Example 1 with a polyethylene pipette using goggles and rubber gloves. The glassy film was left standing for about 5 minutes, rinsed with running water, and air-dried. After drying, the surface of the organic substrate under the vitreous film (coated surface of polyester melamine) was subjected to fluorescent X-ray analysis, and it was confirmed that the film was completely removed. (60 ° reflectance) was reduced from 90 to 85.

Example 1 Ammonium acid fluoride (manufactured by Showa Chemical Co., purity 98%)
Was diluted with pure water to obtain a 5% by weight release composition. This composition was impregnated into a nonwoven fabric, and the surface of the vitreous film obtained in Film Formation Example 1 was wiped several times with bare hands. After washing the hands with weak alkaline soap, the organic substrate (polyester melamine coated surface) was similarly wiped with a nonwoven fabric soaked in pure water. After drying, the concentration of silica on the surface of the organic base material was analyzed by fluorescent X-ray analysis. The result was zero, confirming that the vitreous coating was completely removed. The painted surface completely showed the same surface properties as before the film formation.

Example 2 Ammonium acid fluoride (manufactured by Showa Chemical Co., purity 98%)
Was diluted with pure water to obtain a 5% by weight aqueous solution. This was mixed with a surfactant (nonionic, Nonipol-13 manufactured by Sanyo Chemical Co., Ltd.).
0) was added at 0.01% by weight to obtain a release composition. This composition was applied to the surface of the vitreous film obtained in Film Forming Example 2 by a brush coating method. Next, the coated surface was washed with running water and air-dried. After drying, the surface of the substrate (painted surface) was subjected to fluorescent X-ray analysis, and it was confirmed that the coating was completely removed. The coated surface as the base material completely showed the same surface properties as before the film formation.

Example 3 Ammonium acid fluoride (manufactured by Showa Chemical Co., purity 98%) was diluted with pure water to obtain a 5% by weight aqueous solution. To this, 0.005% by weight of a surfactant (fluorinated nonionic surfactant, Surflon S-145 manufactured by Asahi Glass Co., Ltd.) and 2% by weight of synthetic smectite (Synthetic smectite SWN manufactured by Corp Chemical) as a hydrophilic gelling agent were added. Thus, a release composition was obtained. This composition was applied to a soft film, and the coated surface was covered with a release film to prepare a gel sheet. next,
After covering the surface of the vitreous film obtained in Film Forming Example 3 with the gel sheet from which the release film was peeled off, the soft film of the gel sheet was rubbed to sufficiently contact the vitreous film with the release agent gel. After the gel sheet was peeled off and rinsed with running water, the organic substrate was air-dried. After drying, the surface of the organic substrate was subjected to fluorescent X-ray analysis, and it was confirmed that the coating was completely removed. The coated surface as the base material completely showed the same surface properties as before the film formation.

[0033]

EFFECTS OF THE INVENTION The stripping composition of the present invention does not require protective equipment such as goggles and rubber gloves or exhaust equipment, and does not erode the organic base material under the vitreous coating, and is safe, reliable and simple. The vitreous film can be peeled from the substrate in a short time.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yuki Watanabe 72 Enokicho, Shinjuku-ku, Tokyo F-term in Carmate Co., Ltd. 4H003 BA12 BA15 BA19 DA05 DA11 DA12 EA05 EB25 EB37 ED02 ED28 FA01 FA15

Claims (14)

[Claims] 1. A composition for removing a glassy film formed on an organic substrate, comprising ammonium acid fluoride and water. 2. The composition according to claim 1, comprising an aqueous solution of ammonium ammonium fluoride. 3. The composition according to claim 1, wherein the composition further comprises a hydrophilic gelling agent, and is a hydrophilic gel gelled thereby. 4. The composition according to claim 3, wherein the hydrophilic gel is applied and laminated on a soft film or a sheet to form a sheet-like composite. 5. The composition according to claim 4, wherein the sheet-like composite is a roll-shaped roll with a release film interposed therebetween. 6. The method according to claim 1, further comprising a surfactant.
5. The composition according to any one of the above items 5. 7. A vitreous coating from an organic substrate, wherein the release composition according to claim 1 is brought into contact with a vitreous coating formed on an organic substrate. Peeling method. 8. The stripping method according to claim 7, wherein the composition is an aqueous solution, and the composition is brought into liquid contact with a desired region of the glassy coating to be stripped. 9. The peeling method according to claim 7, wherein the composition is a hydrophilic gel containing a hydrophilic gelling agent, and the gel is brought into contact with a desired region of the vitreous film to be peeled. 10. The peeling method according to claim 9, wherein the hydrophilic gel is applied and laminated on a soft film or a sheet to form a sheet composite. 11. The peeling method according to claim 10, wherein the sheet-like composite is a roll-shaped roll via a release film. 12. The organic substrate, wherein the organic substrate is an organic painted surface, a member,
The peeling method according to claim 7, which is a film or a sheet. 13. The peeling method according to claim 7, wherein the thickness of the vitreous coating is 100 μm or less. 14. The glassy coating comprises 5% by weight of silicon dioxide.
The stripping method according to claim 7, wherein the coating is a silicate glass-based coating.