Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
  • C09D175/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/61—Additives non-macromolecular inorganic
  • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K9/00—Use of pretreated ingredients
  • C08K9/04—Ingredients treated with organic substances

Definitions

• thermosetting coating composition Pre-coating thermosetting coating composition and pre-coated metal plate using the same
• the present invention relates to a precoat thermosetting coating composition having a novel deodorizing property and a precoated metal sheet using the same. More specifically, a pre-coating thermosetting coating composition capable of obtaining a pre-coated metal sheet that adsorbs and decomposes harmful substances volatilized indoors without volatilizing formaldehyde, which is the cause of sick house syndrome, and It is related to V and pre-coated metal plates.
• Airtightness is improved compared to the conventional one.
• Architectural interior materials such as wall materials, ceiling materials, partition materials, wall cloth materials, interior materials for vehicles used in the interiors of vehicles such as automobiles and trains, furniture and daily necessities placed indoors and interiors Sick house syndrome due to harmful substances such as formaldehyde volatilized from various interior materials used in human living spaces such as furniture materials, etc. (interior materials) has become a social problem.
• amino resin is produced by reacting formaldehyde with methylolic hydride, so that formaldehyde contains free formaldehyde after the reaction, remains after baking, and is applied to the partition board.
• formaldehyde contains free formaldehyde after the reaction, remains after baking, and is applied to the partition board.
• water-based paint for indoor pollution control containing water-soluble or water-dispersible rosin (A) and one or more pigments (B) selected from activated alumina, activated clay, zeolite and diatomaceous earth.
• A water-soluble or water-dispersible rosin
• B pigments selected from activated alumina, activated clay, zeolite and diatomaceous earth.
• this paint composition is a water-based normally dry paint, and is not suitable for baking at a high temperature for a short time, and the processability as a coating film for a precoated steel sheet is insufficient.
• thermosetting precoat coating composition containing one or more pigments selected from activated alumina, activated clay, zeolite, and diatomaceous earth is disclosed (for example, see Patent Document 2).
• this paint composition saturates the ability to absorb a certain amount of formaldehyde and absorbs more than a certain amount. There was a drawback of not.
• a synthetic resin coating composition comprising ceramic fine powder (A) having ion-producing ability and glass fine powder (B) containing heavy metal ions (see, for example, Patent Document 3).
• the coating film formed from this coating composition has a problem that its adsorption performance for formaldehyde is insufficient.
• an antibacterial and deodorant containing a titanium phosphate compound or a condensate thereof as an active ingredient is disclosed (for example, see Patent Document 4).
• Patent Document 4 an antibacterial and deodorant containing a titanium phosphate compound or a condensate thereof as an active ingredient
• Paints that self-regenerate when the deodorizing ability reaches saturation due to the photocatalytic action of titanium oxide are known, but they can exhibit their active effect without light (ultraviolet) irradiation. Therefore, it is not effective in a dark room.
• there is a method of using silver or gold which is effective even in a dark room in combination with titanium dioxide, but there are concerns about environmental problems and effects on the human body.
• Patent Document 1 JP 2000-095979 A
• Patent Document 2 JP 2005-255698 A
• Patent Document 3 Japanese Patent Laid-Open No. 2002-038099
• Patent Document 4 Japanese Patent Laid-Open No. 2002-308712
• Patent Document 5 JP-A-9-173830
• Patent Document 6 JP-A-11-130985
• the present invention adsorbs and decomposes harmful substances that are volatilized indoors without volatilizing formaldehyde, which is a causative agent of sick house syndrome, and further, a pleco that has excellent coating film properties. It is an object of the present invention to provide a pre-coating thermosetting coating composition capable of obtaining a sheet metal plate and a pre-coated metal plate using the same.
• a film-forming resin composition containing a hydroxyl group-containing resin and a block isocyanate curing agent and a nitrogen-containing compound having an aldehyde adsorption ability Pre-coated metal sheet formed with a coating composition composed of a surface-treated inorganic compound and a specific titanium phosphate compound does not emit formaldehyde and adsorbs formaldehyde, etc. It was also found that it can be decomposed, and furthermore, it has been found that a coating film having excellent coating properties such as processability, impact resistance, pencil hardness, boiling water resistance and the like can be obtained.
• the present invention provides (A) a film-forming resin composition containing a hydroxyl group-containing resin and a block isocyanate curing agent, (B) an inorganic compound surface-treated with a nitrogen-containing compound having an aldehyde compound adsorption ability, and (C)
• the titanium phosphate compound is contained at a ratio of 0.1 to 10 parts by weight of (B) component and 0.1 to 10 parts by weight of (C) component with respect to 100 parts by weight of component (A). It is intended to provide a thermosetting coating composition for precoat, characterized in that
• the present invention provides the thermosetting coating composition for precoat, wherein the nitrogen-containing compound having an aldehyde compound adsorption ability in the component (B) is a primary amine, secondary amine, hydrazine, hydrazine. At least one substance selected from a derivative, aminotriazole, and ethylene urea, and the inorganic compound is at least one selected from porous silicon dioxide, activated carbon, porous metal oxide, potassium titanate, and zirconium phosphate.
• the present invention provides a thermosetting coating composition for precoat, which is a substance.
• thermosetting coating composition for precoat the hydroxyl group-containing resin contained in the component (A) has a hydroxyl value of 5 to 200 mgKOHZg and a number average molecular weight of 1,000 to 20,000.
• the present invention provides a thermosetting coating composition for precoat, which is at least one kind selected from a hydroxyl group-containing polyester resin, a hydroxyl group-containing alkyd resin, and a hydroxyl group-containing acrylic resin.
• the present invention provides a pre-coated metal plate obtained by coating the coating composition. Is.
• thermosetting coating composition of the present invention by applying the thermosetting coating composition of the present invention to an indoor wall surface or the like to form a coating film, harmful substances such as formaldehyde that volatilize interior materials are blocked. Or, it can be absorbed or decomposed to effectively prevent indoor contamination, and the formed coating film has excellent coating properties such as processability, impact resistance, pencil hardness, and boiling water resistance.
• Examples of the hydroxyl group-containing resin contained in the component (A) used in the invention include polyester resin, alkyd resin, acrylic resin, etc., and the hydroxyl value is preferably in the range of 5 to 200 mg KOHZg. More preferably, it is in the range of 10 to 150 mg KOHZg. When the hydroxyl value is less than 5 mgKOHZg, the curability of the coating film is insufficient and the chemical resistance and solvent resistance are reduced. On the other hand, when the hydroxyl value exceeds 200 mgKOHZg, the processability is lowered, which is not preferable. Further, the number average molecular weight is preferably in the range of 1,000 to 20,000, more preferably in the range of 1,000 to 15,000, and further preferably in the range of 1,200 to 13,000. is there.
• a number average molecular weight of less than 1,000 is not preferable because processability is lowered. If it exceeds 15,000, the chemical resistance and solvent resistance will decrease.
• the polyester resin having a hydroxyl group include a high-molecular polyester resin, an oil-modified polyester resin, an oil-free polyester resin, a silicone-modified polyester resin, and the like.
• Examples of the block isocyanate curing agent compound contained in the component (A) used in the present invention include hexamethylene diisocyanate, isophorone diisocyanate, and tolylene diisocyanate.
• Isocyanate monomers such as sulfonate, diphenylmethane diisocyanate, xylylene diisocyanate, dicyclohexylenomethane 4,4, -diisocyanate
• Some or all of the isocyanate groups of polyisocyanate compounds such as polyisocyanate derivatives such as biuret, isocyanurate, and trimethylolpropane adducts are blocked with a blocking agent.
• this blocking agent examples include, for example, ⁇ -force prolatatum, methyl ethyl ketoxime, methyl isoamyl ketoxime, methyl isobutyl ketoxime and other ketoxime blocking agents, phenol, cresol, catechol, nitrophenol, etc.
• these include phenol-based blocking agents, alcohol-based blocking agents such as isopropanol and trimethylolpropane, and active methylene-based blocking agents such as malonic acid esters and acetoacetic acid esters.
• One kind of these polyblock isocyanate compounds may be used, or two or more kinds may be used in combination.
• thermosetting coating composition for precoat of the present invention (i) an inorganic compound surface-treated with a nitrogen-containing compound capable of adsorbing an aldehyde compound, and (C) a titanium phosphate compound are essential components. Contained!
• the inorganic compound surface-treated with the nitrogen compound of the component (i) is a nitrogen compound containing a functional group that is different from the inorganic compound simply supported by mixing the nitrogen compound.
• an aldehyde such as formaldehyde is used as the nitrogen-containing compound having an aldehyde compound-adsorbing ability.
• a molecule that can be captured by a hydride bond contains a ⁇ group and a - ⁇ group, such as primary amine, secondary amine, hydrazine, hydrazine
• aminotriazole compounds and ethylene urea.
• the primary and secondary amines include dodecylamine, tridecylamine, tetradecylamine, imidazolidinone, and the amino acids lysine, arginine, histidine, and derivatives thereof.
• the hydrazine derivative has at least two or more hydrazide groups or semicarbazide groups in one molecule.
• the hydrazine derivative include shinodic acid dihydrazide, malonic acid dihydrazide, glutaric acid dihydrazide, succinate. Saturated aliphatic carbohydrate having 2 to 18 carbon atoms such as acid dihydrazide, adipic acid dihydrazide, sebacic acid dihydrazide, etc.
• Monohydric unsaturated dicarboxylic acid dihydrazides such as maleic acid dihydrazide, fumaric acid dihydrazide, itaconic acid dihydrazide, etc .; phthalic acid, terephthalic acid or isophthalic acid dihydrazide, and pyromellitic acid dihydrazide, trihydrazide or tetrahydrazide; Examples include oral triacetic acid trihydrazide, citrate trihydrazide, 1,2,4 benzenetrihydrazide, ethylenediaminetetraacetic acid tetrahydrazide, 1,4,5,8 naphthoic acid tetrahydrazide, and the like.
• aminotriazole examples include, for example, 3 amino-1,2,4triazole, 4 amino1,2,4tria:/monore, 3,5 diamino-1,2,4-tria: / monore , 5 amino-3-mercapto-1,2,4 triazole, 3 amino-5 phenyl 1,2,4 triazole. Ethylene urea and the like are also suitable.
• the inorganic compound to be surface-treated is at least one substance selected from porous silicon dioxide, activated carbon, porous metal oxide, potassium titanate, and zirconium phosphate.
• porous metal oxide shown here for example, porous alumina, titania, zirconia and the like can be mentioned, and these composite oxides containing porous silicon dioxide may be used. Specifically, they are activated alumina, activated clay, zeolite, and diatomaceous earth, all of which have a porous structure having a large adsorbing ability.
• Activated alumina has a pore structure obtained by firing alumina hydrates such as gypsite, boehmite, nanolite, and amorphous hydrated gel at an appropriate temperature, usually 200 to 1,000 ° C. Intermediate alumina.
• the activated clay is an acid clay that is one of the clays mainly composed of montmorillonite clay minerals and soluble caustic acid, and a part of the basic components is dissolved.
• zeolite natural zeolite based on hydrous aluminosilicate and synthetic zeolite based on Na 0-A1 O 2 -xSiO 2 -yH 2. Synthetic ze
• Olite also called palm chit
• Olite is produced by a dry process in which sodium carbonate, silica, alumina, or kaolin is melted, or by a wet process in which sodium silicate and sodium aluminate are combined to precipitate the gel.
• Both natural zeolite and synthetic zeolite have an ion exchange ability, the crystal structure does not change even after dehydration, and molecular pores are obtained after dehydration, resulting in a large adsorption ability.
• the sodium aluminosilicate gel is crystallized and dehydrated by hydrothermal synthesis.
• the molecular sieve etc. from which the pore of this is obtained are also used.
• Diatomaceous earth is a silicon dioxide hydrate and has a porous structure, so it has the property of absorbing liquids well.
• the nitrogen-containing compound having aldehyde compound adsorption capacity is generally 0.1 to L0 parts by mass with respect to 100 parts by mass of the inorganic compound to be surface-treated.
• Zaovasuper # 100 formkurin H-300 (manufactured by Daiwa Chemical Industry Co., Ltd.) surface-treated with a nitrogen-containing compound to a metal oxide, and surface-treated amine with silica.
• Examples include Kesmon NS-103, NS-13T, TNS 110, TNS 120 (manufactured by Toagosei Co., Ltd.).
• the average particle size of the inorganic compound surface-treated with the nitrogen-containing compound having the aldehyde compound adsorption ability as the component (ii) is preferably 0.1 to 20 / ⁇ ⁇ force S, and 0.5 to LO / zm is more preferable.
• the coating film has a lower ability to adsorb harmful substances such as formalin and ammonia, and when it exceeds 20 m, the appearance of the coating film tends to deteriorate. is there
• the inorganic compound surface-treated with the nitrogen-containing compound having the ability to adsorb the aldehyde compound as the component (B) is preferably 0.1 to 10 parts by mass with respect to 100 parts by weight of the solid content of the resin. 0.2 to 8 parts by mass is more preferable. When the ratio of use is less than 0.1 parts by mass, the coating film is inferior in the ability to adsorb harmful substances such as formalin and ammonia, and when it exceeds 10 parts by mass, the processability of the coating film is reduced. Nah ...
• the titanium phosphate compound of the component (C) used in the present invention includes a general formula
• Examples thereof include a titanium phosphate compound represented by (1) or a condensate thereof.
• R is an alkyl group having 1 to 4 carbon atoms
• x, y, z, m and n are each a number of 0 or more
• x + y + z + m + n 3 or 4 is satisfied. Number.
• R is preferably an ethyl group or an isopropyl group.
• titanium phosphate compound examples include Ti (OH) (H PO) (OR), Ti (OH)
• Examples of commercially available products include Ecochimera SE-50E, Ecochimera SW-50 (manufactured by YOO Corporation), Nanofine 2 (manufactured by Giessep Co., Ltd.), and the like.
• the titanium phosphate compound of component (C) used in the present invention is desirably 0.1 to L0 parts by mass with respect to 100 parts by mass of the solid resin. More preferably, 0.2 to 8 parts by mass is desirable. If the proportion used is less than 0.1 parts by mass, the resolution of harmful substances such as formalin and ammonia absorbed by the coating film is inferior, and if it exceeds 10 parts by mass, the water resistance of the coating film decreases. This is not preferable.
• thermosetting coating composition for precoat of the present invention as a pigment, if necessary, for example, colored pigments such as titanium dioxide, carbon black, bengara, phthalocyanine blue, calcium carbonate, talc, My strength Further, extender pigments such as clay, key sand, and pearlite, aggregates, and the like may be appropriately selected and blended.
• the above-mentioned pigment as a whole is formulated so that the volume ratio of all pigments (including inorganic compounds surface-treated with nitrogen-containing compounds capable of adsorbing aldehyde compounds) in the total solid content in the paint is 2 to 70% by mass. It is also desirable to have the point of denseness and barrier properties of the coating.
• thermosetting coating composition for precoat of the present invention may further contain coating additives such as surfactants, dispersants, antifoaming agents, thickeners and the like, if necessary.
• coating additives such as surfactants, dispersants, antifoaming agents, thickeners and the like.
• the production method is not special and can be carried out by a known method. For example, it can be carried out by adding a curing agent, a pigment component, and, if necessary, a coating additive to the main resin, and dispersing it uniformly by a known means such as a stirrer.
• negative ion generating materials such as antibacterial agents, anti-bacterial agents, antistatic agents and tourmaline can be blended.
• thermosetting coating composition for precoat of the present invention As a material to which the thermosetting coating composition for precoat of the present invention is applied, various metal plates are used, for example, a cold-rolled steel plate, an electrogalvanized steel plate, an electroalloy zinc-plated steel plate, a molten zinc-plated steel plate. Examples include steel sheets (non-alloyed), galvanized steel sheets, hot-dip galvanized steel sheets (alloyed), zinc-plated steel sheets such as molten zinc-aluminum alloy-plated steel sheets, stainless steel sheets, aluminum sheets, and aluminum alloy sheets. Also, when applying primer to metal plates For this, it is preferable to perform pre-coating treatment on the surface of the metal plate. As this pre-coating treatment, any chemical conversion treatment used as a pre-treatment for brecoat metal can be used. For example, chromate conversion treatment, phosphatization treatment. Examples thereof include a synthesis treatment and a composite oxide film treatment.
• a pre-coated metal sheet obtained using the pre-coating thermosetting coating composition of the present invention can be obtained by the following paint finish. That is, after applying and curing an undercoat paint on a metal plate as necessary, the thermosetting paint composition for precoat of the present invention having aldehyde compound adsorption ability is applied as an overcoat paint and heat-cured. The painting finish method is mentioned.
• a force roll coater, a flow coater, a spray or the like that can be applied by various coating methods is preferred.
• the force that can be considered the natural method and the reverse method
• the reverse method is preferred in terms of surface smoothness of the coating surface.
• the undercoating paint and the coating applied with the top coating of the present invention are cured in sequence, and this curing is usually carried out at 100 to 300 ° C for 5 seconds to 5 minutes.
• a method of curing under a curing condition of 15 to 120 seconds at a maximum temperature of 120 to 260 ° C. is usually preferred.
• the thickness of the coating applied with the undercoat paint is preferably 1 to: 3 to 8 / ⁇ ⁇ , where LO / z m is preferred. Further, the thickness of the coating film applied with the top coating composition of the present invention is preferably 10 to 40 / ⁇ ⁇ .
• test piece was immersed in boiling water for 2 hours, and then the abnormality of the coating film was observed and judged according to the following criteria.
• a test piece cut to a size of 10 cm in length and 10 cm in width was placed in a 1 L-volume Tedlar bag, sealed and degassed, and 1 L of lOppm formaldehyde gas was injected. After standing at room temperature for 2 hours, the formaldehyde gas concentration in the Tedlar bag was measured using a detector tube, and formaldehyde adsorption performance was evaluated according to the following criteria. A: 0.1-3 ppm (very good range).
• 0 More than 0.3 ppm and up to 0.5 ppm (range considered to be good in practical use).
• X More than 0.5 ppm (a range that is not good).
• the repeatability was evaluated based on the results of adsorption and rerelease tests in 3 and 5 cycles.
• Component (A) Byron GK13CS (manufactured by Toyobo Co., Ltd., polyester resin, hydroxyl value 20 mg KOHZg, number average molecular weight 7,000, nonvolatile content 50% by mass) 93 parts by mass, component (C) Ecochimera SE— 50E (manufactured by YOO Corporation, phosphoric acid titer) 2 parts by mass, as a pigment JR-602 (manufactured by Tika Co., Ltd., titanium dioxide) 36 parts by mass, as solvent, Solvesso 10 0 (Etso Co., Ltd., aromatic petroleum naphtha) 23. 1 part by mass, cyclohexanone 23.2 parts by mass were dispersed in a sand mill so that the particle size was 10 m or less to obtain a pigment mill base. .
• component DesmodurBL3175 manufactured by Bayer, block isocyanate compound, effective NCO 11.1% by mass, nonvolatile content 75% by mass
• component Zouba Super # 100 manufactured by Daiwa Chemical Industry Co., Ltd., deodorant
• surface conditioner BYK-325 manufactured by Big Chemie Co., Ltd.
• dibutyltin dilaurate as an isocyanate dissociation catalyst 0.5 mass Part was added and mixed to prepare a solvent-type paint.
• the obtained paint was Solvesso # 100 (Etsuso Co., Ltd .: Aromatic Petroleum Naphtha) Z cyclohexanone (50 parts by mass Z50 parts by mass) with Ford Cup No. 4 in 120 ⁇ 10 seconds. The viscosity was adjusted so that “Thermosetting precoat paint 1” was obtained.
• the composition of the coating composition is shown in Table 1.
• a pre-color primer HP-32 (trade name, BASF) was applied to a 55% aluminum zinc-based alloy galvanized steel sheet (galvalume steel sheet), a 0.35-mm thick coated chromate-treated steel sheet material.
• the polyester resin of component (A) of Example 1 was added to Alakide 7052L (Araha 11 Chemical Industries, Polyester resin, hydroxyl value 60 mg KOHZg, number average molecular weight 4,000, nonvolatile content 60% by mass), A pigment millbase was produced in the same manner as in Example 1 except that the component C) was replaced with the pigment types and amounts shown in Tables 1 and 2. In the same manner as in Example 1, the remaining raw materials shown in Tables 1 and 2 were mixed into the pigment mill base and mixed, and Solvesso # 100 (manufactured by Etso Corporation: aromatic petroleum naphtha).
• thermosetting precoat paints 2-7, 9-11 Adjust the viscosity with Z cyclohexanone (50 parts by mass, Z50 parts by mass) so that it becomes 120 ⁇ 10 seconds in Ford Cup No. 4, and apply “Thermosetting precoat paints 2-7, 9-11.
• a thermosetting precoated steel sheet coating 2-7, 9- each using L 1 with a roll coater, the film thickness was 20 The coating was applied so that the maximum temperature of the steel sheet reached 240 ° C.
• the obtained test board was subjected to a coating property test. Shown in 2.
• Component (A) Polyester resin arakyd 7052L 80 parts by mass and diacid titanium Titanium JR- 602 40 parts by mass, Solvesso 100 as solvent (Aromatic petroleum naphtha manufactured by Ethso Co., Ltd.) 19.6 Mass 19.6 parts by mass of cyclohexanone was dispersed with a sand mill so that the particle size was 10 m or less, to obtain a mill base of pigment. Next, 20 parts by mass of component (A) DesmodurBL3175 and 0.2 part by mass of the surface modifier BYK-325 were added to and mixed with this pigment mill base.
• thermosetting pre-coated steel sheet paints 8 and 12 were each used with a roll coater so that the film thickness was 20 m. They were applied in sequence so that the maximum temperature reached by the steel sheet was 240 ° C.
• the obtained test plate was subjected to a film physical property test. The evaluation results are shown in Tables 1 and 2.
• Byron GK13CS trade name, manufactured by Toyobo Co., Ltd., polyester rosin hydroxyl value 20 mg KOH / g, number average molecular weight 7000, nonvolatile content 50% by mass,
• Alakide 7052L Product name, manufactured by Arakawa Chemical Industries, polyester resin, hydroxyl value 6 OmgKOH / g, number average molecular weight 4,000, nonvolatile content 60% by mass
• Desmodur BL3175 Product name, manufactured by Bayer, block isocyanate compound, effective NCOl l. 1% by mass, non-volatile content 75% by mass 4)
• Zova Super # 100 trade name, inorganic compound with nitrogen-containing compound adsorbed on metal oxide, average particle size 1 ⁇ m
• Kesmon NS—103 trade name, inorganic compound with amine adsorbed on silica, average particle size 4 m
• JR—602 Trade name, manufactured by Tika Corporation, titanium dioxide
• Solvesso 100 Aromatic Petroleum Naphtha, manufactured by Etsuso Corporation
• BYK-325 Big Chemie Co., Ltd., surface conditioner
• Examples 1 to 7 have no problem in workability, impact resistance, pencil hardness, and boiling water-resistant coating film properties, and are excellent in formaldehyde adsorption, re-release resistance, and repeated deodorization.
• Comparative Example 1 is an example that does not contain the component (C), and the formaldehyde adsorption capacity is inferior in certain force repetition performance.
• Comparative Example 2 is an example in which the content of component (B) exceeds the upper limit and is excellent in formaldehyde adsorption, re-release resistance, and repeated deodorization, but inferior in workability and impact resistance.
• Comparative Example 3 is an example in which the content of component (C) exceeds the upper limit and is excellent in formaldehyde adsorption, re-release resistance, and repeated deodorization, but inferior in boiling water resistance.
• Comparative Example 4 is an example that does not contain the component (B).
• Comparative Example 5 is an example that does not contain both components (B) and (C), but is inferior in formaldehyde adsorption capacity and repeatability.

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