JP2003238844A - Ultraviolet curable filler paint composition, painting method and painted building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet curable filler paint composition free from a styrene monomer, inhibiting infiltration of a reactive diluent in a ceramic inorganic base plate, and improving the painting aptitude and the painting environment. <P>SOLUTION: The ultraviolet curing filler paint composition for the ceramic inorganic base plate comprises an unsaturated polyester resin, an epoxy(meth) acrylate and/or a urethane acrylate, a pigment, a photopolymerization initiator and an acrylic monomer without containing the styrene monomer. The method comprises painting the surface of the ceramic inorganic base plate with the resultant paint composition using a natural reverse squeeze roll coater method. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a UV-curable sealing composition for ceramics-based inorganic substrates, in which the penetration of a reactive diluent into a substrate is controlled.

[0002]

2. Description of the Related Art Ceramic-based inorganic substrates have been used for building materials for the purpose of nonflammability, heat insulation, sound absorption, and the like. Specifically, fiber reinforced calcium silicate board, fiber reinforced cement board, wood fiber reinforced cement board, volcanic glassy multi-layer board, etc. are used. After that, through a polishing step, a top coating is applied to achieve water resistance, stain resistance, chemical resistance, weather resistance, physical properties such as alkali stopping of the base material, and designability. To improve the surface of the substrate, the sealer may be applied before applying the sealing paint. Conventionally, a paint containing an unsaturated polyester resin and a styrene monomer has been used as a sealing paint, but in recent years, the reduction of the use of the styrene monomer has been demanded in view of environmental protection and safety.

However, in a ceramic-type inorganic substrate, a solvent, a reactive diluent and the like penetrate into the substrate, so that the styrene monomer of a conventional styrene monomer-containing sealing paint is changed to another reactive diluent (acrylic monomer). If the alternative sealing paint is designed to have a viscosity range that is suitable for initial painting, a large amount of acrylic monomer is required compared to styrene monomer, so that the penetration of the monomer into the substrate is remarkable and However, there was a problem that the viscosity suddenly increased and coating suitability was lost. Further, when the amount of the acrylic monomer blended was lowered, the viscosity increased, and the suitability for coating was also lost. Furthermore, since the coating composition on the substrate surface changes to a composition with significantly less reactive diluent than the initial composition after the UV curing process after coating, the cured film on the surface does not serve the purpose of sealing even after curing. There was also a problem.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the coating suitability and coating property by suppressing the permeation of the reactive diluent in the UV-curable sealing paint containing no styrene monomer into the substrate. It is to improve the working environment.

[0005]

Means for Solving the Problems As a result of earnest studies, the present inventors have found that when an unsaturated polyester resin is diluted with an acrylic monomer and a specific acrylate is used in combination, the reactive diluent is prevented from penetrating into the substrate. They have found that they can be suppressed and have reached the present invention.

That is, the present invention is firstly characterized in that it contains an unsaturated polyester resin, an epoxy (meth) acrylate and / or a urethane acrylate, a pigment, a photoinitiator and an acrylic monomer, and does not contain a styrene monomer. Provided is a UV-curable sealing coating composition for ceramic-based inorganic substrates.

Secondly, the present invention is characterized in that the above-mentioned ultraviolet-curing type sealing paint is applied on the surface of a ceramic-type inorganic substrate by a natural reverse squeeze roll coater system and cured by irradiation with ultraviolet rays. Thirdly, a method for coating an inorganic substrate is provided. Thirdly, there is provided a ceramic-based inorganic coating building material characterized in that at least one layer of the above-mentioned UV-curable sealing paint is provided on a ceramic-based inorganic substrate. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An ultraviolet-curable sealing composition for a ceramic inorganic substrate containing an unsaturated polyester resin, an epoxy acrylate and / or a urethane acrylate, a pigment and an acrylic monomer as a reactive diluent according to the present invention. The details will be described below.

As the polyol which is a constituent component of the unsaturated polyester resin used in the ultraviolet curable sealing composition of the present invention, conventionally known ones can be used, and among them, ethylene is particularly representative. Glycol, diethylene glycol, triethylene glycol,
Polyethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, neopentyl glycol, 1,3-butanediol, 2,3-butanediol, 1,4- Butanediol, 1,6-hexanediol, 1,1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 2,2,4-trimethyl-1,3-pentanediol, 3- Methyl-1,5-pentanediol,
Dichloroneopentyl glycol, dibromoneopentyl glycol, hydroxypivalic acid neopentyl glycol ester, cyclohexane dimethylol, 1,4
-Cyclohexanediol, ethylene oxide or propylene oxide adduct of hydroquinone, trimethylolethane, ethylene oxide or propylene oxide adduct of trimethylolethane, trimethylolpropane, ethylene oxide or propylene oxide adduct of trimethylolpropane, glycerin, of glycerin Ethylene oxide or propylene oxide adduct, 3-methylpentane-1,3,5-
Examples thereof include triol, pentaerythritol, spiroglycol, tricyclodecane dimethylol, hydrogenated bisphenol A, ethylene oxide or propylene oxide adduct of bisphenol A, and carbonate diol. Of these, propylene glycol type is preferable.

Representative examples of unsaturated polybasic acids or their anhydrides which are essential components of such unsaturated polyester resins include maleic acid, fumaric acid, itaconic acid,
It is a conventionally known α, β-unsaturated polybasic acid such as citraconic acid or chlorinated maleic acid, or an anhydride thereof. Among them, maleic acid and fumaric acid are particularly preferable.

Typical examples of saturated polybasic acids or their anhydrides which can be used in combination are phthalic acid and
Tetrahydrophthalic acid, monochlorophthalic acid, dichlorophthalic acid, trichlorophthalic acid, het acid, chlorendic acid, dimer acid, adipic acid, pimelic acid, succinic acid, alkenylsuccinic acid, sebacic acid, azelaic acid, 2,2,2 4-trimethyladipic acid, terephthalic acid, dimethyl terephthalic acid, 2-sodium sulfoterephthalic acid, 2-potassium sulfoterephthalic acid, isophthalic acid, 5-sodium sulfoisophthalic acid, 5-potassium sulfoisophthalic acid, or dimethyl or diethyl ester 5-sodium sulfoisophthalate di-lower alkyl, orthophthalic acid, 4-sulfophthalic acid, 1,10-decamethylenedicarboxylic acid, muconic acid,
Oxalic acid, malonic acid, glutaric acid, trimetic acid, hexahydrophthalic acid, tetrabromophthalic acid, methylcyclohexene tricarboxylic acid, pyromellitic acid, or their acid anhydrides, among which phthalic acid, isophthalic acid, and terephthalic acid. An acid or the like is preferably used.

In addition, conventionally known fatty acids such as flaxseed oil fatty acid, sesame seed oil fatty acid, safflower oil fatty acid, soybean oil fatty acid, rice bran oil fatty acid, coconut oil fatty acid, castor oil fatty acid, cottonseed oil fatty acid, tall oil fatty acid, etc. You may use together.

Further, as the above-mentioned unsaturated polyester resin, an unsaturated polyester resin obtained by adding an unsaturated monoglycidyl compound to an unsaturated polyester resin containing a carboxyl group at a molecular end and an allyl ether group are used. An unsaturated polyester resin containing,
Unsaturated polyester resin in a form containing a polymerizable monomer, and urethane-modified unsaturated polyester resin obtained by urethane-modifying unsaturated polyester resin with polyvalent isocyanate, or unsaturated polyester resin with epoxy compound Modified epoxidized unsaturated polyester resins can also be used.

The epoxy (meth) acrylate used in the ultraviolet curable sealing composition of the present invention is produced by ring-opening addition of an epoxy group of an epoxy compound with a compound which shares a carboxylic acid with an active double bond. It is a thing.

As the epoxy compound which is a constituent component here, conventionally known compounds can be used. Among them, particularly representative ones are bisphenol A type or epichlorohydrin condensates of hydrogenated products or brominated products thereof, bisphenols. There are various compounds such as F-type or hydrogenated epichlorohydrin condensate, neopentyl glycol-epichlorohydrin type epoxy resin, 1,6-hexanediol-epichlorohydrin type epoxy resin, cyclic oxirane ring and the like.

The above-mentioned epoxy compounds can be used either individually or in combination of two or more. Among these, compounds having an average of 1.5 or more glycidyl groups in one molecule are preferable, and among them, bisphenol type compounds are preferable. Epichlorohydrin condensates are preferred.

The urethane acrylate used in the ultraviolet curable sealing composition of the present invention is prepared by urethanization reaction of a compound containing at least one (meth) acryloyl group and a hydroxyl group in one molecule with a polyisocyanate compound. It is produced, and a polyol compound may be used in combination if necessary.

As the compound which is a constituent component and used in combination with at least one (meth) acryloyl group and a hydroxyl group in one molecule, conventionally known compounds can be used, but particularly typical compounds are 2- Hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3
-Hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol mono (meth) acrylate, pentaerythritol tri (meth) acrylate or a (meth) acrylate compound having various hydroxyl groups Examples include ring-opening reaction products with ε-caprolactone and its modified products.

The polyisocyanate compound referred to herein may be used alone or in combination with a polyisocyanate in the form of isocyanurate and an isocyanate compound, and a typical example thereof is 2,6-tolylene diene. Diisocyanate compounds having an aromatic ring such as isocyanate, 1,3-xylene diisocyanate and diphenylmethane-4,4-diisocyanate; diisocyanate compounds having an aliphatic ring such as dicyclohexylmethane diisocyanate and isophorone diisocyanate; hexamethylene diisocyanate and lysine diisocyanate Difunctional diisocyanate compounds such as compounds obtained by hydrogenating each aromatic ring-containing diisocyanate compound; -Type polyisocyanate compound obtained by reacting a substance with water; a trifunctional isocyanate compound such as 2-isocyanate ethyl-2,6-diisocyanate hexanoate; a large amount obtained by converting each diisocyanate compound into an isocyanurate There are body types.

As the polyol compound which can be used in combination with the above-mentioned urethane acrylate, polyether polyol, polyester polyol, alkylene polyol, polycarbonate polyol and the like can be used.

The acrylic monomer used in the ultraviolet curable sealing composition of the present invention is used as a reactive diluent for dissolving an unsaturated polyester resin and epoxy (meth) acrylate and / or urethane acrylate.

Examples of the acrylic monomer capable of dissolving the above-mentioned unsaturated polyester resin and epoxy (meth) acrylate and / or urethane acrylate include dipropylene glycol acrylate, methoxytriethylene glycol acrylate, phenoxyethyl acrylate, phenoxydiethylene glycol acrylate, and EO-modified nonylphenol. Monofunctional monomers such as acrylate, EO-modified 2-ethylhexyl acrylate, isobornyl acrylate, octyl / decyl acrylate; 1,6
-Hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, hydroxypivalic acid neopentyl glycol diacrylate,
Bifunctional monomers such as 2-ethyl-2-butyl-propanediol diacrylate, 1,9-nonanediol diacrylate, EO-modified bisphenol A diacrylate, PO-modified bisphenol A diacrylate, and EO-modified hydrogenated bisphenol A diacrylate; Trimethylolpropane triacrylate, EO modified trimethylolpropane triacrylate, PO modified trimethylolpropane triacrylate, caprolactone modified trimethylolpropane triacrylate, pentaerythritol triacrylate, glycerin propoxytriacrylate, pentaerythritol tetraacrylate, ditrimethylolpropane tetraacrylate , Trifunctional or higher polyfunctional monomers such as dipentaerythritol hexaacrylate Rukoto can be.

These acrylic monomers can be used alone or in a mixture of two or more. Preferred are EO-modified bisphenol A diacrylate and EO-modified trimethylolpropane triacrylate.
In addition, for applications using an alkaline base material such as a slate plate, it is preferable to contain a trifunctional or higher functional monomer in order to prevent alkali from the base material and prevent efflorescence.

The mixing ratio of the above-mentioned unsaturated polyester resin, epoxy (meth) acrylate and / or resin composition comprising urethane acrylate and acrylic monomer is
The range of 1 to 30: 5 to 40:40 to 80% by mass is preferable because the balance between the permeability to the substrate and the suitability for coating is excellent, and more preferably 10 to 20:15 to 30:50.
It is 70% by mass.

The epoxy (meth) acrylate and urethane acrylate may be used alone or in combination. When used in combination, the total amount of both is preferably the above-mentioned amount when used alone.

The pigment used in the ultraviolet-curable sealing composition of the present invention is preferably an inorganic pigment as an aggregate for the purpose of sealing effect. Specific examples include calcium carbonate, talc, synthetic and natural mica, calcined clay, silica, and the like, with calcium carbonate and talc being particularly preferred. The particle size of the pigment varies depending on the coating method, but for natural reverse squeeze coater coating it is 3 μm ~
The particle size distribution is preferably about 20 μm and has a broad particle size distribution. The blending ratio of the pigment is preferably about 30 to 70% by mass in 100% by mass of the coating composition, and more preferably 40 to 60% by mass.

As the photoinitiator used in the ultraviolet curable sealing composition of the present invention, conventionally known photoinitiators can be used. Among them, particularly representative ones are benzophenone, benzyl, Michler's ketone and thioxanthone. , Anthraquinone, and other compounds that generate radicals by abstracting hydrogen, and generally, a tertiary amine such as methylamine, diethanolamine, N-methyldiethanolamine, or tributylamine is used in combination with these compounds. . Other photoinitiators are, for example, compounds of the type that generate radicals by intramolecular division, and include benzoin, dialkoxyacetophenone, acyloxime ester, benzyl ketal, hydroxyalkylphenone, halogenoketone, and the like.

The mixing ratio of the photoinitiator in the resin composition comprising the unsaturated polyester resin, epoxy (meth) acrylate and / or urethane acrylate, and the acrylic monomer and the photoinitiator excluding the pigment is 100
It is preferably 1 to 15 mass% in the mass%.

In addition to the ultraviolet-curable sealing composition of the present invention, additives such as a dispersant, a defoaming agent, a leveling agent, an antibacterial agent, a fungicide, a polymerization inhibitor and an organic solvent should be used. Can be done.

The UV-curable sealing composition of the present invention can be produced by a conventionally known method. As an example, it can be produced by mixing an unsaturated polyester resin, epoxy (meth) acrylate and / or urethane acrylate, an acrylic monomer and a photoinitiator, and stirring and dispersing the pigment.

The viscosity range of the ultraviolet-curable type sealing composition of the present invention varies depending on the coating method, but the liquid temperature is 30.
50 to 1000 mPas is preferable at 0 ° C, and a liquid temperature of 3 for natural reverse squeeze coater coating.
300-800 mPas at 0 degreeC is especially preferable in terms of coating suitability.

The ultraviolet curable sealing composition of the present invention comprises a fiber reinforced calcium silicate board, a fiber reinforced cement board,
It is preferably used as a sealing paint for ceramics-based inorganic substrates such as wood fiber reinforced cement boards and volcanic glass-based multi-layer boards.

As the coating method of the ultraviolet-curable sealing composition of the present invention, conventionally known methods such as a roll coater and a knife coater can be applied. The roll coater system in the present invention includes a natural reverse squeeze coater, a natural reverse roll coater, a natural roll coater, a reverse roll coater, and the like,
In particular, a natural reverse squeeze coater method, in which the coating composition is applied with a roll in the forward rotation direction with respect to the traveling direction of the substrate and then the coated surface is smoothed with a reverse rotation roll, can be preferably used.

In the case of a conventional coating composition in which the styrene monomer of the coating composition containing styrene monomer is replaced by another reactive diluent (acrylic monomer), the acrylic coating is designed to have a viscosity range having an initial coating suitability. Since a large amount of the system monomer is required as compared with the styrene monomer, the penetration of the monomer into the substrate is remarkable, and the coating composition on the substrate surface before the UV curing process after coating is more reactive than the original composition. The composition is remarkably reduced, and the cured film on the surface does not serve the purpose of sealing even after curing.

Particularly, in the above-mentioned natural reverse squeeze coater system, since the surplus paint on the surface portion scraped by the reverse squeeze is circulated and used, the composition of the sealing paint supplied to the first coating roll is The composition of the acrylic monomer gradually becomes small, and the viscosity increases, so that the coating becomes impossible.

When the amount of the acrylic monomer compounded is lowered, the viscosity is increased, and the suitability for coating is also lost. Furthermore, since the coating composition on the substrate surface changes to a composition with significantly less reactive diluent than the initial composition after the UV curing process after coating, the cured film on the surface does not serve the purpose of sealing even after curing. There is also a problem.

The ultraviolet-curable sealing composition of the present invention is a novel ultraviolet-curable sealing composition in which the permeation of these acrylic monomers into the substrate is sufficiently suppressed. Further, a sufficient sealing effect can be exerted even on a substrate obtained by subjecting these substrates to a sealer such as an aqueous acrylic emulsion or isocyanate resin for surface modification or on an untreated substrate. .

The coating amount of the ultraviolet curable sealing composition of the present invention applied by the above-mentioned coating method is 50 when cured.
To 300 μm is preferable, and 100 to 20 is more preferable.
It is 0 μm.

The irradiation amount of ultraviolet rays for curing the ultraviolet curable type sealing composition of the present invention is preferably 50 to 500 mJ / cm 2 as integrated radiation intensity, and more preferably 200 to 300 mJ / cm 2.

[0040]

EXAMPLES The present invention will be specifically described below with reference to examples, but the scope of the present invention is not limited to these examples. Unless otherwise specified, parts and% represent parts by mass and% by mass.

(Example 1) As the substrate, a calcium silicate plate surface-treated with methylene diisocyanate was used. Unsaturated polyester resin (neopenene isophthal propylene glycol fumaric acid type unsaturated polyester resin) 7
Parts, epoxy acrylate (bisphenol A type epoxy acrylate) 9 parts, EO-modified trimethylolpropane triacrylate 26 parts, calcium carbonate 17 parts, talc 35 parts, and Irgacure 184 (photoinitiator) 3
And a modified polyurethane-based polymer dispersant (3 parts) were coated on a substrate with a natural reverse squeeze coater. A natural roll was applied at 200 g / m 2 and scraped by a reverse squeeze to form a 100 g / m 2 coating film. The ultraviolet ray was applied at a dose of 400 mJ for curing.

(Example 2) 4 parts of unsaturated polyester resin (neopene isophthal propylene glycol fumaric acid type unsaturated polyester resin), 12 parts of epoxy acrylate (bisphenol A type epoxy acrylate), EO-modified trimethylolpropane triacrylate 26 Part, 17 parts of calcium carbonate, 35 parts of talc, 3 parts of Irgacure 184 (photoinitiator), and 3 parts of modified polyurethane polymer dispersant were applied and cured according to Example 1.

(Example 3) 10 parts of unsaturated polyester resin (neopene isophthal propylene glycol fumaric acid type unsaturated polyester resin), 6 parts of epoxy acrylate (bisphenol A type epoxy acrylate), EO-modified trimethylolpropane triacrylate 26 Part, 17 parts of calcium carbonate, 35 parts of talc, 3 parts of Irgacure 184 (photoinitiator), and 3 parts of modified polyurethane polymer dispersant were applied and cured according to Example 1.

(Example 4) 8 parts of unsaturated polyester resin (neopene isophthal propylene glycol fumaric acid type unsaturated polyester resin), 8 parts of urethane acrylate (caprolactone modified alicyclic urethane acrylate), E
O-modified trimethylolpropane triacrylate 26
Part, 17 parts of calcium carbonate, 35 parts of talc, 3 parts of Irgacure 184 (photoinitiator), and 3 parts of modified polyurethane polymer dispersant were applied and cured according to Example 1.

(Comparative Example 1) 16 parts of unsaturated polyester resin (neopene isophthal propylene glycol fumaric acid type unsaturated polyester resin), 9 parts of styrene monomer, E
9 parts of O-modified trimethylolpropane triacrylate,
A paint consisting of 20 parts of calcium carbonate, 40 parts of talc, 3 parts of Irgacure 184 (photoinitiator) and 3 parts of a modified polyurethane polymer dispersant was applied and cured according to Example 1.

Comparative Example 2 16 parts of epoxy acrylate (bisphenol A type epoxy acrylate), 26 parts of EO-modified trimethylolpropane triacrylate, 17 parts of calcium carbonate, 35 parts of talc, and 3 parts of Irgacure 184 (photoinitiator). A coating consisting of 3 parts of the modified polyurethane polymer dispersant was applied and cured according to Example 1.

(Comparative Example 3) 16 parts of unsaturated polyester resin (neopene isophthal propylene glycol fumaric acid type unsaturated polyester resin), 26 parts of EO-modified trimethylolpropane triacrylate, calcium carbonate 17
Part, talc 35 parts, Irgacure 184 (photoinitiator) 3 parts, and modified polyurethane polymer dispersant 3 parts were applied and cured according to Example 1.

(Evaluation method) Tests and evaluations regarding the coating suitability of the adjusted paints were conducted by the following methods.

(Coating suitability-1) When the coating of Examples 1 to 4 and Comparative Examples 1 to 4 was applied with a natural roll in order to measure the penetration of the reactive diluent in the sealing paint into the substrate. And the viscosity after scraping with a reverse squeeze roll were compared, and it was evaluated that the smaller the increase in viscosity, the better the coating suitability. Viscosity was measured with a Visco Tester (Rion Co., Ltd.) rotor 2 and the liquid temperature of the coating was 25
℃ was made. The legend is shown below. ⊚: Very good (viscosity increase rate of less than 15%) ○: Good (viscosity increase rate of less than 30%) △: Somewhat poor (viscosity increase rate of less than 70%) ×: Poor (viscosity increase rate of 70% or more)

(Coating suitability-2) The finished appearances of the cured coating films of Examples 1 to 4 and Comparative Examples 1 to 4 were visually evaluated from the surface smoothness and the clogging effect. The legend is shown below. ◎: Very good ○: Good △: Slightly bad ×: Bad

[0051]

[Table 1]

However, the paint viscosities 1 and 2 in the table represent the following. Paint viscosity 1: Viscosity when applied with a natural roll Paint viscosity 2: Viscosity after scraped with a reverse squeeze roll

[0053]

EFFECTS OF THE INVENTION The sealing composition according to the present invention suppresses the permeation of a reactive diluent into a substrate, is excellent in coating suitability, and is excellent in environmental suitability. A coating composition can be provided.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09D 5/34 C09D 5/34 163/10 163/10 167/06 167/06 175/14 175/14 E04F 13/02 E04F 13/02 AF term (reference) 4D075 AC26 BB46Z CA50 DA06 DB11 DC03 EA21 EA39 EB23 EB35 EC37 4J038 DB371 DD181 DG211 DG311 DG321 FA11 HA286 HA446 HA526 HA536 HA546 JA32 JB05 KA08 PA15 PA17 PB12

Claims (6)

[Claims] 1. UV curing for a ceramic inorganic substrate, which comprises an unsaturated polyester resin, an epoxy (meth) acrylate and / or a urethane acrylate, a pigment, a photoinitiator and an acrylic monomer, and does not contain a styrene monomer. Mold filling coating composition. 2. The unsaturated polyester resin, the epoxy (meth) acrylate and / or the urethane acrylate, and the acrylic monomer are mixed in a mixing ratio of 1 to 30: 5 to 4.
The UV-curable sealing composition for ceramic-based inorganic substrates according to claim 1, which is in the range of 0:40 to 80% by mass. 3. The ultraviolet-curable sealing composition for a ceramic inorganic substrate according to claim 1, wherein the content of the pigment is 30 to 70% by mass. 4. The ultraviolet curable sealing composition for a ceramic inorganic substrate according to claim 1, wherein the acrylic monomer has a trifunctional or higher polyfunctional monomer. 5. The ceramic-based inorganic substrate is coated with the ultraviolet-curable coating composition according to any one of claims 1 to 4 by a natural reverse squeeze roll coater method and cured by irradiation with ultraviolet rays. A method for coating a ceramic-based inorganic substrate for sealing. 6. At least one ultraviolet-curable sealing paint according to any one of claims 1 to 4 on a ceramic inorganic substrate.
Ceramic-based inorganic coating building material characterized by layers.