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
  • C09D201/00—Coating compositions based on unspecified macromolecular compounds
• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/02—Emulsion paints including aerosols
• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/18—Fireproof paints including high temperature resistant paints
• • 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
  • C09D7/63—Additives non-macromolecular organic

Definitions

• the present invention relates to a water-based foaming fire-resistant paint composition containing water as a diluent medium.
• the fire resistant coating materials include rock wool fire resistant coatings and foamed fire resistant coatings.
• Rock wool fireproof coating materials are inexpensive and widely distributed in the market, but they require a thickness of 1 cm to several cm to exhibit fireproof performance, and there is a problem that spraying work is difficult.
• foaming fire-resistant paint is a coating material that expands due to the temperature rise in the event of a fire, demonstrating heat insulation.
• the fire-resistant coating using foamed fire-resistant paint is a thin film under normal conditions, and does not impair the shape of the structure itself. It is possible to suppress the temperature rise of the structure and delay the collapse of the structure.
• Patent Document 1 the present applicant proposed a foamed fire-resistant coating containing a hydrolyzable silyl group-containing resin, a plasticizer, a foaming agent, and a carbonizing agent as this foamed fire-resistant coating.
• this paint it is easy to apply a thick coating, and a protective coating film with excellent physical properties such as quick drying, internal hardening, and water resistance can be obtained. It can be formed.
• the foamed fire-resistant paint described in Patent Document 1 contains an organic solvent as a dilution medium, and there is a problem of odor when it is applied in hospitals, schools, etc. In addition, there is a problem that it is impossible to carry out work in parallel with electrical work due to scattering of the organic solvent.
• Patent Document 2 discloses a foaming fire-resistant coating composition containing an acrylic resin emulsion as a binder component as a synthetic resin emulsion.
• JP 2018-159065 A JP-A-2005-89670
• Water-based paints for painting on buildings must form a durable coating film even under normal temperature drying conditions. Therefore, an acrylic resin emulsion, which is said to have high durability, is generally used as a coating film-forming component.
• acrylic resin emulsions using acrylic resin emulsions have the problem that foaming of the paint film is difficult in the event of a fire, resulting in insufficient fire resistance.
• An object of the present invention is to propose a water-based foaming fire-resistant coating composition capable of forming a foaming coating film resistant to flames or heat in the event of a fire.
• the inventors have diligently studied the above problems. As a result, they have found that a water-based foaming fire-resistant coating composition containing a plasticizer has excellent fire resistance.
• Item 1 A water-based foaming fire-resistant coating composition comprising a water-based resin (A), a char-forming aid (B), a carbon source (C), a blowing agent (D), a plasticizer (E) and water.
• Item 2 Item 2.
• Item 3 Item 3.
• the water-based foaming fire-resistant coating composition according to Item 1 or 2 wherein the plasticizer (E) is a plasticizer using adipic acid or citric acid as a raw material.
• Item 4 A method of coating a substrate, comprising coating the surface of the substrate with the water-based foaming fire-resistant coating composition according to any one of Items 1 to 3.
• Item 5 A method for protecting a structure from heat and fire, comprising coating the surface of a substrate with the water-based foaming fire-resistant coating composition according to any one of Items 1 to 3.
• the water-based foaming fire-resistant coating composition of the present invention it is possible to form a flame- or heat-resistant coating film, and it is possible to delay the temperature rise of steel materials and the like.
• (meth)acrylate means acrylate and/or methacrylate
• (meth)acrylic acid means acrylic acid and/or methacrylic acid
• (Meth)acryloyl refers to acryloyl and/or methacryloyl
• (Meth)acrylamide” refers to acrylamide and/or methacrylamide.
• the water-based foaming fire-resistant coating composition of the present invention contains a water-based resin (A), a char-forming aid (B), a carbon source (C), a foaming agent (D), a plasticizer (E) and water.
• the water-based resin (A) is a water-soluble or dispersible resin.
• the type of the resin is not particularly limited, and when it is in the form of dispersed particles, it may be either a monolayer or a multilayer such as a core-shell type.
• water-based resin (A) conventionally known water-based resins can be used without particular limitation as long as they have a coating film-forming ability. , epoxy resins, polyester resins, alkyd resins, melamine resins, and the like, but are not limited to these. Moreover, these may be used individually or may use 2 or more types together.
• the water-based resin (A) preferably has a carboxyl group in the molecule.
• the acid value of the water-based resin (A) is preferably 3 to 100 mgKOH/g, more preferably 5 to 80 mgKOH/g.
• the acid value is the number of mg of potassium hydroxide required to neutralize the acid groups contained in 1 g of the non-volatile resin mass, determined by a conventional method based on alkali neutralization titration.
• aqueous resin (A) examples include emulsions containing copolymers of carboxyl group-containing polymerizable unsaturated monomers and other polymerizable unsaturated monomers (hereinafter referred to as "copolymer emulsions").
• Carboxyl group-containing polymerizable unsaturated monomers include (meth)acrylic acid, maleic acid, crotonic acid, itaconic acid, ⁇ -carboxyethyl acrylate, and combinations thereof.
• the amount of the carboxyl group-containing polymerizable unsaturated monomer is preferably 1 to 20% by mass, particularly preferably 3 to 10% by mass, based on the total polymerizable unsaturated monomer.
• polymerizable unsaturated monomers include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n- Hexyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, tridecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isostearyl acrylate ( Osaka Organic Chemical Industry Co., Ltd., trade name), cyclohexyl (meth) acrylate, methyl cyclohexyl (meth)
• alkyl or cycloalkyl (meth)acrylates alkyl or cycloalkyl (meth)acrylates; (meth)acrylates having an isobornyl group such as isobornyl (meth)acrylate; (meth)acrylates having an adamantyl group such as adamantyl (meth)acrylate; vinyl aromatic compounds such as styrene, ⁇ -methylstyrene, and vinyltoluene; Polymerization with alkoxysilyl groups such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, ⁇ -(meth)acryloyloxypropyltrimethoxysilane, ⁇ -(meth)acryloyloxypropyltriethoxysilane sexually unsaturated monomers; perfluoroalkyl (meth)acrylates such as perfluorobutylethyl (meth)acrylate and per
• a sulfonic acid group-containing polymerizable unsaturated monomer Phosphate group-containing polymerizable unsaturated monomers such as 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, 2-acryloyloxypropyl acid phosphate, 2-methacryloyloxypropyl acid phosphate; Carbonyl groups such as acrolein, diacetone acrylamide, diacetone methacrylamide, acetoacetoxyethyl methacrylate, formyl styrene, vinyl alkyl ketones having 4 to 7 carbon atoms (e.g., vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone) containing polymerizable unsaturated monomers; and combinations thereof.
• the other polymerizable unsaturated monomer preferably contains a vinyl aromatic compound.
• the copolymerization ratio is preferably such that the amount of the vinyl aromatic compound is 55% by mass or more in the total polymerizable unsaturated monomers used in the production of the aqueous resin (A). , more preferably in the range of 70 to 95% by mass.
• the copolymer emulsion can be obtained by adopting an ordinary method, but from the viewpoint of the water resistance of the formed coating film, it is preferably obtained by an emulsion polymerization method.
• a copolymer emulsion which is an aqueous dispersion of the copolymer, can be obtained by polymerizing the monomer components constituting the copolymer using a polymerization initiator in the presence of water and an emulsifier. can.
• the water-based resin (A) preferably contains 5 to 50% by mass of non-volatile matter in the aqueous foaming fire-resistant coating composition, more preferably 10 It can be present in the range of -35% by weight.
• the non-volatile content means the residue after removing the volatile components, and the residue may be solid or liquid at room temperature.
• the residue may be solid or liquid at room temperature.
• a component remaining when a 0.3 g sample is heated at 105° C. for 30 minutes and dried is treated as a non-volatile component.
• the char-forming aid (B) is a substance for promoting the formation of char when the coating film formed from the water-based foaming fire-resistant coating composition is exposed to fire.
• a Lewis acid is generally considered to have an auxiliary function to form char, and specifically phosphorus-containing compounds such as ammonium phosphate, ammonium polyphosphate and phosphoric acid are used.
• phosphorus-containing compounds an ammonium phosphate compound that is an ammonium salt of phosphoric acid or polyphosphoric acid is preferred, and ammonium polyphosphate is more preferred.
• Other char-forming aids may also be used in the present invention instead of or in addition to the phosphorus-containing compound.
• a combination of ammonium polyphosphate and tris-(2-hydroxyethyl)isocyanurate (THEIC) is one example.
• the char-forming auxiliary agent (B) is preferably 10 to 70% by mass, more preferably 20 to 45% by mass in the water-based foaming fire-resistant coating composition based on the total mass of non-volatile matter in the water-based foaming fire-resistant coating composition. % can be present.
• the water-based foaming fire-resistant coating composition contains a carbon source (C).
• Examples of the carbon source (C) include pentaerythritol, dipentaerythritol, polyvinyl alcohol, starch, cellulose powder and the like.
• the carbon source (C) is preferably in an amount of 1 to 50% by mass, more preferably 5 to 30% by mass in the aqueous foaming fire-resistant coating composition, based on the total mass of non-volatile matter in the aqueous foaming fire-resistant coating composition. can exist in
• the water-based foaming fire-resistant coating composition of the present invention contains a foaming agent (D).
• a blowing agent (D) is one or more compounds that decompose to provide an expanding gas when exposed to heat (usually fire). Sufficient heat to decompose the blowing agent and generate gas is typically about 90° C. or higher.
• the temperature at which the foaming agent (D) releases gas is preferably a temperature at which the organic polymer softens and a temperature lower than the temperature at which char is formed.
• the water-based foaming fire-resistant coating composition thus formed can be sufficiently foamed to form char and become a better thermal insulator.
• Foaming agents (D) include melamine, melamine formaldehyde, methylolated melamine, hexamethoxymethyl melamine, melamine monophosphate, melamine diphosphate, melamine polyphosphate phosphate, melamine pyrophosphate, melamine cyanurate, urea, nitrourea, dimethylurea, dicyandiamide, guanyl.
• Urea phosphate, glycine, amine phosphate, azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), p-toluenehydrazide, p-toluenesulfonyl semicarbazide, dinitrosopentamethylenetetramine, 5-phenyltetrazole, diazoaminobenzene etc. can be used.
• the compound decomposes when exposed to heat, releasing nitrogen gas.
• Compounds that release carbon dioxide, water vapor and/or ammonia when exposed to heat such as ammonium borate, potassium carbonate, citric acid derivatives, expandable graphite can also be used as blowing agents.
• a preferred blowing agent in the present invention can be melamine or its derivatives, used alone or in combination.
• the foaming agent (D) can be present in a range of preferably 1 to 30% by mass, more preferably 5 to 25% by mass, based on the total mass of nonvolatile matter in the aqueous foaming fire-resistant coating composition. .
• the water-based foaming fire-resistant coating composition of the present invention contains a plasticizer (E) from the viewpoint of fire resistance.
• the plasticizer (E) is a component that remains in the coating film and has a weight average molecular weight of 250 or more, preferably 300 or more, and a weight average molecular weight of 2000 or less, preferably 1900 or less. is preferable from the viewpoint of fire resistance.
• the weight average molecular weight of a substance whose chemical formula is clear is the molecular weight calculated from the chemical formula.
• the weight average molecular weight of a substance whose chemical formula is not clear is the retention time (retention volume) measured using gel permeation chromatography (GPC), and the retention time (retention volume) of standard polystyrene with a known molecular weight measured under the same conditions. ) converted into the molecular weight of polystyrene.
• HEC-8120GPC (trade name, manufactured by Tosoh Corporation) is used as a gel permeation chromatograph
• TSKgel G4000HXL "TSKgel G3000HXL”
• TSKgel G2500HXL and "TSKgel G2500HXL” are used as columns.
• TSKgel G2000HXL (trade name, both manufactured by Tosoh Corporation) using a total of four, using a differential refractometer as a detector, mobile phase: tetrahydrofuran, measurement temperature: 40 ° C., flow rate: 1 mL / min. can be measured under the conditions of
• plasticizer (E) examples include fatty acid ester plasticizers and phosphate ester plasticizers.
• Fatty acid ester plasticizers include adipates, citrates, benzoates, myristates, acetates, succinates, glutarates, sebacates, and these. A combination is mentioned.
• a plasticizer using adipic acid or citric acid as a raw material is particularly preferred.
• Phosphate plasticizers include trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tricyclohexyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl Diphenyl phosphate, dicresylphenyl phosphate, dimethyl ethyl phosphate, methyl dibutyl phosphate, ethyl dipropyl phosphate, isodecyl diphenyl phosphate, hydroxyphenyl diphenyl phosphate, resorcinol bis diphenyl phosphate, triaryl isopropyl phosphate, these with various substituents Modified compounds, various condensation types thereof, and the like.
• the content of the plasticizer (E) is preferably in the range of 0.1 to 15% by mass, more preferably 0.5 to 10% by mass based on the non-volatile content of the paint.
• the water-based foaming fireproof coating composition of the present invention contains water.
• Water is a diluent medium, and the amount of water in the aqueous foaming fire-resistant coating composition can be appropriately selected by those skilled in the art. 60% by mass, more preferably in the range of 10 to 50% by mass.
• the water-based foaming fire-resistant coating composition of the present invention contains other components such as pigments, pigment dispersants, film-forming aids, fibers, catalysts, organic solvents, additives for changing melt viscosity, rheology modifiers, and curing agents. can optionally include, but are not limited to,
• pigments include colored pigments such as titanium dioxide (white pigment), carbon black, and iron oxide; and filler pigments such as baryte, talc, calcium carbonate, kaolin, and clay.
• the pigment is preferably present in the water-based foaming fire-resistant coating composition in an amount of 1 to 40% by mass, more preferably 5 to 30% by mass, based on the total mass of non-volatile matter in the water-based foaming fire-resistant coating composition. can be done.
• the film-forming aid is an organic solvent with a high boiling point that is compatible with the water-based resin (A), remains in the coating film even after the water volatilizes, and promotes fusion of the water-based resin (A) particles. It is a component that gradually volatilizes over time.
• the weight average molecular weight of the coalescing agent is less than 250, for example.
• Specific examples of film-forming aids include ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monobenzyl ether, ethylene glycol monohexyl ether, ethylene glycol mono-2-ethylhexyl ether, and diethylene glycol monomethyl ether.
• diethylene glycol diethyl ether diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol dibutyl ether, diethylene glycol monophenyl ether, diethylene glycol monohexyl ether, diethylene glycol monobenzyl ether, diethylene glycol mono-2-ethylhexyl ether, triethylene glycol monomethyl ether, triethylene glycol mono Butyl ether, polyethylene glycol monobutyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol monophenyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monomethyl ether
• Glycol ether compounds such as propy
• the water-based foaming fire-resistant paint composition of the present invention contains a film-forming aid in addition to the plasticizer (E), the content in that case is preferably 0.00, based on the non-volatile content of the paint. It is in the range of 1 to 15 mass %, more preferably 0.5 to 10 mass %.
• the present invention further relates to a method of coating a substrate, comprising coating the surface of the substrate with the above water-based foaming fire-resistant coating composition.
• the water-based foaming fire-resistant coating composition of the present invention can be cured and/or dried at ambient temperatures, such as -5°C to 40°C. Therefore, it is suitable for application to large structures where heat curing is impractical.
• the thickness of the dry film of the layer of the water-based foaming fire-resistant coating composition can be appropriately selected according to the application. Typically, it is preferably 100 ⁇ m to 8 mm, more preferably 200 ⁇ m to 4 mm for cellulosic refractory applications (eg, architectural applications such as office buildings).
• the present invention further relates to a method of protecting a structure from fire or heat, comprising coating the surface of a substrate with the water-based foaming fire-resistant coating composition.
• the water-based foaming fireproof coating composition of the present invention can be applied to various substrates.
• Examples of base materials include not only metals such as steel frames, aluminum, and galvanized iron plates, but also wallpaper, plywood, wood, inorganic boards, concrete, mortar, FRP, plastics, paper, cloth, fibers, synthetic resins, rubber, and silicon. , electric wires and cables.
• the structure comprises a substrate.
• Examples of structures include above-ground structures and offshore structures, and particularly suitable structures include buildings defined in Articles 21 and 27 of the Building Standards Law. Some of the specific examples include buildings, schools, hospitals, hotels, movie theaters, stores, warehouses, airports, and the like.
• the water-based fire-resistant foaming paint composition of the present invention When applying the water-based fire-resistant foaming paint composition of the present invention to the steel frame of an existing structure, after performing a surface treatment such as rust removal, the water-based fire-resistant foaming paint composition of the present invention is applied after applying a primer coating as necessary. You can paint things. Further, after coating the water-based foaming fire-resistant coating composition of the present invention, a known top coating may be applied.
• the coating method is not particularly limited, and it can be easily applied by general methods such as brush, trowel, roller, spray, etc. It is possible not only to apply smoothly, but also to form a thick film with uneven patterns. be. These coating methods are appropriately selected according to the purpose of use of the substrate.
• the water-based foaming fire-resistant coating composition of the present invention can also have the following constitution.
• Section 1. A water-based foaming fire-resistant coating composition comprising a water-based resin (A), a char-forming aid (B), a carbon source (C), a blowing agent (D), a plasticizer (E) and water.
• Section 2. Item 2. The water-based foaming fire-resistant coating composition according to Item 1, wherein the weight average molecular weight of the plasticizer (E) is in the range of 300-2000.
• Item 3. Item 3.
• any one of items 1 to 3, wherein the water-based resin is one or more selected from the group consisting of acrylic resins, acrylic silicon resins, urethane resins, fluorine resins, epoxy resins, polyester resins, alkyd resins, and melamine resins.
• the aqueous resin (A) is a copolymer emulsion of a carboxyl group-containing polymerizable unsaturated monomer and other polymerizable unsaturated monomers
• the other polymerizable unsaturated monomers include alkyl or cycloalkyl (meth)acrylates, isobornyl group-containing (meth)acrylates, adamantyl group-containing (meth)acrylates, vinyl aromatic compounds, and polymerizable unsaturated monomers having an alkoxysilyl group.
• Item 6. The water-based foaming fire-resistant coating composition according to any one of Items 1 to 5, wherein the char-forming aid (B) contains a phosphorus-containing compound.
• Item 7. Any one of items 1 to 6, wherein the char-forming auxiliary agent (B) is contained in the water-based foaming fire-resistant coating composition in an amount of 10 to 70% by mass based on the total mass of non-volatile matter in the water-based foaming fire-resistant coating composition.
• the water-based foaming fire-resistant coating composition according to any one of Items 1 to 7, wherein the carbon source (C) comprises pentaerythritol, dipentaerythritol, polyvinyl alcohol, starch, or cellulose powder.
• Item 9. Item 9. Any one of Items 1 to 8, wherein the carbon source (C) is contained in the water-based foaming fire-resistant coating composition in an amount of 1 to 50% by mass based on the total mass of non-volatile matter in the water-based foaming fire-resistant coating composition.
• the foaming agent (D) is melamine, melamine formaldehyde, methylolated melamine, hexamethoxymethylmelamine, melamine monophosphate, melamine diphosphate, melamine polyphosphate phosphate, melamine pyrophosphate, melamine cyanurate, urea, nitrourea, dimethylurea, dicyandiamide, guanyl urea phosphate, glycine, amine phosphate, azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), p-toluenehydrazide, p-toluenesulfonyl semicarbazide, dinitrosopentamethylenetetramine, 5-phenyltetrazole, or diazoamino Item 10.
• Item 11. The water-based foaming fire-resistant coating composition according to any one of items 1 to 10, wherein the foaming agent (D) is contained in an amount of 1 to 30% by mass based on the total mass of non-volatile matter in the water-based foaming fire-resistant coating composition.
• Item 12. A method of coating a substrate, comprising coating the surface of the substrate with the water-based foaming fire-resistant coating composition according to any one of Items 1 to 11.
• Item 13 A method for protecting a structure from heat and fire, comprising applying the water-based foaming fire-resistant coating composition according to any one of Items 1 to 11 to a substrate surface.
• Example 1 the same as Example 1 except that the plasticizer (E1) used is replaced with the plasticizers (E2) to (E14) or the film forming aids (F1) to (F6) listed in Table 1 below. to obtain water-based foaming fire-resistant coating compositions (X-2) to (X-20).
• each water-based foaming fire-resistant paint composition was applied to a blasted steel plate of 100 mm ⁇ 100 mm ⁇ 3.2 mm so that the dry film thickness was 1.0 mm, and dried at 23 ° C. for 7 days.
• a simple fire resistance test was performed using a calorimeter. Specifically, a thermocouple was attached to the back side of the test panel, an ignition test was performed using a cone calorimeter with a heating intensity of 50 kw/m 2 , and the thermocouple temperature and foaming ratio after 20 minutes were recorded. The results are also shown in Table 1. In the table, the lower the thermocouple temperature value and the larger the expansion ratio value, the better the result.
• the expansion ratio is the value obtained by dividing the film thickness of the water-based foaming fire-resistant paint composition after the fire resistance test by the film thickness before the fire resistance test.
• Examples 1-14 are water-based foamed fire-resistant coating compositions containing a plasticizer as defined in the present invention.
• Comparative Examples 1 to 6 are water-based foaming fire-resistant paint compositions that do not contain a plasticizer and contain only a film-forming aid instead of a plasticizer, and thus fall outside the scope of the present invention.
• a water-based foaming fire-resistant coating composition containing a plasticizer is superior in both fire resistance and expansion ratio to a water-based foaming fire-resistant coating composition containing a film-forming aid.
• the plasticizer is superior to the film-forming aid in terms of expansion ratio.

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• 2022
  • 2022-11-22 WO PCT/JP2022/043124 patent/WO2023095773A1/ja not_active Ceased
  • 2022-11-22 JP JP2023563689A patent/JPWO2023095773A1/ja active Pending

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