WO2020122486A2 - Composition de couche de fond à l'eau - Google Patents

Composition de couche de fond à l'eau Download PDF

Info

Publication number
WO2020122486A2
WO2020122486A2 PCT/KR2019/016794 KR2019016794W WO2020122486A2 WO 2020122486 A2 WO2020122486 A2 WO 2020122486A2 KR 2019016794 W KR2019016794 W KR 2019016794W WO 2020122486 A2 WO2020122486 A2 WO 2020122486A2
Authority
WO
WIPO (PCT)
Prior art keywords
weight
resin
base coat
parts
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/016794
Other languages
English (en)
Korean (ko)
Other versions
WO2020122486A3 (fr
Inventor
문성희
김창혁
조수영
김맹기
정선화
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KCC Corp
Original Assignee
KCC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KCC Corp filed Critical KCC Corp
Priority to CN201980081442.4A priority Critical patent/CN113166576A/zh
Priority to SG11202106183TA priority patent/SG11202106183TA/en
Publication of WO2020122486A2 publication Critical patent/WO2020122486A2/fr
Publication of WO2020122486A3 publication Critical patent/WO2020122486A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—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
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/65—Additives macromolecular

Definitions

  • the present invention relates to a water-soluble base coat composition.
  • the outer plate of the vehicle body should not have deterioration and rust of the coating film, and should have durability to maintain the gloss or color of the coating film. Therefore, in the coating process of a vehicle, after the electrodeposition coating of a vehicle that has been subjected to a pre-treatment process, a middle coating is applied to improve adhesion and smoothness, and a base coating is applied to a vehicle that has been moderately coated for aesthetic appearance of the vehicle. Thereafter, it is common to apply a clear coat to protect the color of the base coat, improve the appearance, and protect the base coat from the outside.
  • the base coat coating and the clear coat coating it is common to apply the clear coat composition after application and drying of the base coat composition, and to cure the clear coat and the base coat together when curing the clear coat (130 to 150°C). For this reason, the conventional base coat composition is designing the composition based on the high temperature curing condition. However, in order to reduce the cost of the painting process, there is a tendency to shorten the process and to increase the demand for a composition curable at low temperature.
  • Korean Patent Registration No. 158,534 includes a subject mixture containing an acrylic polyol, an ester solvent, a leveling agent, an additive composed of a slip agent and a wax, and an alcohol solvent; And a curing agent mixture containing a polyisocyanate and an ester-based solvent.
  • a two-component acrylic urethane composition is disclosed.
  • the base coat composition that can be used in the conventional low-temperature baking conditions, particularly 120 °C or less, as in Patent Document 1, there is a coating composition for automobile repair and coating composition for parts, but the mechanical properties of the prepared coating film are insufficient. Therefore, there is a limit to apply it as a paint for car bodies.
  • the present invention is to provide a base coat composition capable of producing a coating film having excellent mechanical properties while being curable at a low temperature of 120°C or lower.
  • the present invention provides a water-soluble base coat composition
  • a water-soluble base coat composition comprising an acrylic resin, a polyurethane dispersion resin, a polyester resin, a urethane resin, a melamine-based curing agent and an oxazoline-based curing agent.
  • the base coat composition according to the present invention can be performed at a low temperature of 120° C. or lower, which is a lower temperature than the prior art, so that the cost required during the coating process can be reduced.
  • the mechanical properties of the coating film prepared from the composition in particular, excellent properties such as gloss, impact resistance, water resistance, cold resistance to chipping, and can be usefully used for coating the body.
  • the water-soluble base coat composition according to the present invention includes an acrylic resin, a polyurethane dispersion resin, a polyester resin, a urethane resin, a melamine-based curing agent and an oxazoline-based curing agent.
  • the acrylic resin serves to improve the rheology and hardness of the coating film prepared from the base coat composition including the same.
  • the acrylic resin may be synthesized directly according to a known method, or a commercially available product may be used.
  • the acrylic resin is selected from the group consisting of allyl methacrylate (AMA), methyl methacrylate (MMA), ethyl acrylate (EA), hydro ethyl acrylate (HEA) and methacrylic acid (MAA). It may include one or more monomer-derived units.
  • the acrylic resin includes allyl methacrylate (AMA), methyl methacrylate (MMA), ethyl acrylate (EA), hydro ethyl acrylate (HEA) and methacrylic acid (MAA) as monomers. It may be prepared from a mixture.
  • the mixture may further include a divalent acrylic monomer.
  • the divalent acrylic monomer is, for example, 1,4-butanediol diacrylate (1,4-Butanediol diacrylate), 1,4-butanediol dimethacrylate (1,4-Butanediol dimethacrylate), 1,5-penta Diol dimethacrylate (1,5-Pentanediol dimethacrylate), 1,6-hexanediol diacrylate (1,6-Hexanediol diacrylate), 1,6-hexanediol dimethacrylate (1,6-Hexanediol dimethacrylate) , 1,9-Nonanediol dimethacrylate, 1,10-Decanediol dimethacrylate, Ethylene glycol diacrylate, And ethylene glycol dimethacrylate.
  • the acrylic resin has a hydroxyl value (OHv) of 5 to 50 mgKOH/g, an acid value (Av) of 5 to 50 mgKOH/g, a glass transition temperature (Tg) of -30 to 30°C, and at 25°C. May have a viscosity of 20 to 600 cps.
  • the acrylic resin has a hydroxyl value of 5 to 30 mgKOH/g, or 8 to 20 mgKOH/g, an acid value of 5 to 30 mgKOH/g, or 8 to 20 mgKOH/g, and a glass transition temperature of 0°C.
  • the viscosity at 25 °C may be 20 to 400 cps, or 40 to 200 cps.
  • the hydroxyl value of the acrylic resin is within the above range, by improving the curability of the composition, impact resistance, water resistance, adhesion and cold resistance chipping is secured, and when the acid value is within the above range, storage stability and film hardness are secured, glass
  • the transition temperature is within the above range, it is possible to secure adequate coating properties while having good storage stability.
  • the viscosity at 25°C is within the above range, there is an effect of easy workability.
  • the acrylic resin may be in the form of an emulsion dispersed in deionized water.
  • the acrylic resin is in the form of an emulsion dispersed in a solvent, and may have an average diameter of 50 to 300 nm, or 70 to 170 nm.
  • VOC volatile organic compounds
  • the acrylic resin in the form of emulsion may have a solid content (NV) of 15 to 50% by weight based on the total weight of the resin.
  • the acrylic resin in the emulsion form may have a solid content of 20 to 45% by weight, or 30 to 40% by weight based on the total weight of the resin.
  • the acrylic resin may be included in the composition in an amount of 20 to 30 parts by weight based on 5 to 10 parts by weight of the polyurethane dispersion resin. As another example, the acrylic resin may be included in the composition in an amount of 22 to 27 parts by weight based on 5 to 10 parts by weight of the polyurethane dispersion resin.
  • the content of the acrylic resin is within the above range, proper rheology can be secured, and there is an excellent effect in appearance, water resistance, impact resistance and cold resistance chipping.
  • the polyurethane dispersion resin serves to improve the dryness of the base coat composition comprising the same, and to improve the flexibility of the coating film prepared from the composition.
  • the polyurethane dispersion resin may be a polyurethane dispersion resin derived from polyester-polycarbonate.
  • the polyurethane dispersion resin may be a polyurethane dispersion resin derived from polyester-polycarbonate diol.
  • the polyurethane dispersion resin may be in the form of a dispersion dispersed in deionized water.
  • the polyurethane dispersion resin is in the form of a dispersion dispersed in deionized water, and may have an average diameter of 200 nm or less, or 50 to 200 nm.
  • the polyurethane dispersion resin may have a viscosity of 10 to 50 cps at 25°C, and a solid content (NV) of 20 to 50% by weight based on the total weight of the dispersion resin.
  • the polyurethane dispersion resin has a viscosity at 25°C of 20 to 45 cps, or 30 to 40 cps, and a solid content of 25 to 45% by weight, or 27 to 40% by weight based on the total weight of the dispersion resin. %.
  • the viscosity of the polyurethane dispersion resin at 25°C is within the above range, the appearance and workability are excellent, and when the solid content is within the above range, there is an effect that the workability can be improved.
  • the polyurethane dispersion resin may be included in the composition in an amount of 5 to 10 parts by weight based on 20 to 30 parts by weight of acrylic resin.
  • the polyurethane dispersion resin may be included in the composition in an amount of 6 to 9 parts by weight based on 20 to 30 parts by weight of acrylic resin.
  • the polyester resin serves to improve the flexibility and appearance characteristics of the coating film prepared from the base coat composition containing the same.
  • the polyester resin may be prepared by reacting a carboxylic acid compound and a diol compound.
  • the polyester resin is adipic acid (AA), isophthalic acid (IPA), trimaleic anhydride (TMA), alicyclic acid, phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid, fumaric acid, maleic acid
  • At least one carboxylic acid compound selected from the group consisting of acid anhydride, tetrahydrophthalic anhydride, hexahydro phthalic anhydride and derivatives thereof;
  • 1,6-hexanediol (1,6-HD) neopentyl glycol (NPG), trimethylol propane (TMP), ethylene glycol, propylene glycol, diethylene glycol, butanediol 1,4-hexanediol and 3-methyl
  • TMP trimaleic anhydride
  • alicyclic acid phthalic anhydr
  • the polyester resin may be in a liquid form having a solids content (NV) of 50 to 85% by weight based on the total weight of the resin.
  • the polyester resin may be in a liquid form having a solids content of 60 to 80% by weight, or 65 to 75% by weight based on the total weight of the resin.
  • the polyester resin has a hydroxyl value (OHv) of 50 to 150 mgKOH/g, an acid value (Av) of 10 to 100 mgKOH/g, a Gardner viscosity of P to U, and a weight average molecular weight (Mw) of 500 to 2,000. g/mol.
  • the polyester resin has a hydroxyl value of 80 to 130 mgKOH/g, or 100 to 120 mgKOH/g, an acid value of 10 to 80 mgKOH/g, or 20 to 50 mgKOH/g, and a Gardner viscosity of Q to T, and may have a weight average molecular weight of 700 to 1,500 g/mol, or 800 to 1,300 g/mol.
  • the hydroxyl value of the polyester resin is within the above range, the water dispersibility and coating properties are good, and when the acid value is within the above range, the storage stability and crosslink density are improved, so that the cold resistance to chipping is good, and the Gardner viscosity is If it is within the above range, the workability is easy, and when the weight average molecular weight is within the above range, the coating properties and the appearance are good.
  • the polyester resin may be included in the composition in an amount of 1 to 10 parts by weight based on 20 to 30 parts by weight of acrylic resin.
  • the polyester resin may be included in the composition in an amount of 3 to 8.5 parts by weight based on 20 to 30 parts by weight of acrylic resin.
  • the urethane resin serves to improve the workability of the base coat composition comprising the same, and to improve the appearance characteristics of the coating film prepared from the composition.
  • the urethane resin may be a urethane diol compound.
  • the urethane resin may include primary amino alcohols such as amino ethanol or amino isopropanol; Or a primary diamine such as ethylene diamine, propylene diamine, 2-methyl-pentane diamine-(1,5) or hexane diamine-(1,6); and a urethane diol obtained by reaction of an alkylene carbonate such as ethylene or propylene carbonate.
  • primary amino alcohols such as amino ethanol or amino isopropanol
  • a primary diamine such as ethylene diamine, propylene diamine, 2-methyl-pentane diamine-(1,5) or hexane diamine-(1,6)
  • a urethane diol obtained by reaction of an alkylene carbonate such as ethylene or propylene carbonate.
  • the urethane resin is a urethane diol-based compound, a viscosity at 25°C is 2,000 to 4,000 cps, and a hydroxyl value (OHv) may be 200 to 500 mgKOH/g.
  • the urethane resin is a urethane diol-based compound, the viscosity at 25°C is 2,200 to 3,800 cps, or 2,500 to 3,500 cps, and the hydroxyl value is 250 to 400 mgKOH/g, or 280 to 350 mgKOH/g
  • Solid content (NV) based on the total weight of the resin may be 80 to 95% by weight, or 84 to 92% by weight in a liquid form.
  • the urethane resin may be included in the composition in an amount of 0.1 to 5 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the urethane resin may be included in the composition in an amount of 0.1 to 3 parts by weight, or 0.5 to 2 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the melamine-based curing agent serves to cure by crosslinking reaction with each component of the base coat composition, and serves to improve the appearance characteristics and gloss of the coating film prepared from the base coat composition containing the same.
  • the melamine-based curing agent may include a hydrophilic melamine resin containing an imino group.
  • the melamine-based curing agent may be in a liquid form containing a hydrophilic melamine resin containing an imino group.
  • the melamine-based curing agent may include a hydrophilic melamine resin containing an imino group, and a solid content (NV) of 85 to 95% by weight based on the total weight of the melamine-based curing agent.
  • melamine-based curing agent examples include Cymel-325, Cymel-327 and Cymel-385 from Cytec, Resimene HM-2608 from INEOS, Resimene 718 and Resimene 717, and Luwipal 052 and 072 from BASF.
  • the melamine-based curing agent may be included in the composition in an amount of 1 to 5 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the melamine-based curing agent may be included in the composition in an amount of 1 to 4 parts by weight, or 1.5 to 3.5 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the oxazoline-based curing agent serves to cure by crosslinking reaction with each component of the base coat composition, and serves to improve the appearance characteristics of the coating film prepared from the base coat composition containing the same.
  • the oxazoline-based curing agent may be an oxazoline group-containing polymer.
  • the oxazoline-based curing agent may be in the form of an emulsion of an oxazoline group-containing polymer.
  • the VOC (Volatile organic compounds) content of the paint may be lowered.
  • the oxazoline-based curing agent may have a glass transition temperature (Tg) of -70 to 10°C, and a solid content (NV) of 20 to 60% by weight based on the total weight of the oxazoline-based curing agent.
  • Tg glass transition temperature
  • NV solid content
  • the oxazoline-based curing agent may have a glass transition temperature of -60 to 0°C, and a solid content may be 30 to 50% by weight based on the total weight of the oxazoline-based curing agent.
  • the glass transition temperature of the oxazoline-based curing agent is within the above range, it is possible to improve the mechanical properties by improving the curing rate and crosslinking density, and when the solid content is within the above range, it is possible to improve workability and reduce the VOC content. .
  • the oxazoline-based curing agent may be included in the composition in an amount of 1 to 5 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the oxazoline-based curing agent may be included in the composition in an amount of 2 to 5 parts by weight, or 2.5 to 4.5 parts by weight based on 20 to 30 parts by weight of the acrylic resin.
  • the base coat composition may further include a solvent.
  • the solvent controls the viscosity of the composition, and serves to reduce the generation of volatile organic compounds (VOC).
  • the solvent may include at least one water selected from the group consisting of deionized water, pure water, ultrapure water and distilled water.
  • the solvent may further include an organic solvent in addition to water.
  • the base coat composition may include 20 to 95 parts by weight of a solvent based on 100 parts by weight of an acrylic resin.
  • the base coat composition may include 25 to 90 parts by weight of a solvent based on 100 parts by weight of an acrylic resin.
  • the solvent content in the composition is within the above range, the water dispersibility of the resins in the composition is low, the problem of environmental friendliness, which is the advantage of the water-based coating, and the evaporation of water is insufficient, resulting in defects such as pinholes in the final coating film. Problems such as occurrence of stains can be prevented.
  • the base coat composition may further include a pigment.
  • the pigment serves to impart color to the prepared coating film.
  • the base coat composition may be an effect pigment for imparting a metallic effect to a coating film, a coloring pigment that provides a color and hiding effect in combination with a coating material, or a combination thereof.
  • examples of the effect pigments include water-treated aluminum flakes, mica pigments, or mixtures thereof.
  • examples of the coloring pigments include oxide-based inorganic pigments, azo, polycyclic organic pigments containing Vat pigments, anthraquinone-based organic pigments, or mixtures thereof.
  • the base coat composition may include 10 to 50 parts by weight of pigment based on 100 parts by weight of the acrylic resin.
  • the base coat composition may include 20 to 40 parts by weight of pigment based on 100 parts by weight of acrylic resin.
  • the base coat composition may further include at least one additive selected from the group consisting of a co-solvent, a neutralizing agent, a catalyst, a UV absorber leveling agent, a defoamer, a wetting agent, and a wax.
  • the base coat composition may include 50 to 150 parts by weight of the additive based on 100 parts by weight of the acrylic resin.
  • the base coat composition may include 60 to 120 parts by weight of the additive based on 100 parts by weight of the acrylic resin.
  • the co-solvent affects the smoothness of the coating film to be produced, imparts storage stability of the base coat composition, lowers the minimum film formation temperature, and serves to control the volatility of the solvent during painting.
  • the co-solvent is, for example, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, propylene glycol, N-methyl-2-pyrrolidone, n-propyl alcohol, i-propyl alcohol, n-butanol, propylene Glycol monomethyl ether, butyl glycol, hexyl glycol, 2-ethylhexyl alcohol, butyl carbitol, and the like, but are not limited thereto.
  • the neutralizing agent serves to improve the storage stability of the base coat composition and to adjust the pH (to pH 7.5-9.0 level).
  • the neutralizing agent is, for example, trialkylamines such as trimethylamine, triethylamine and tributylamine, N,N-dimethylethanolamine, N,N-dimethylpropanolamine, N,N-dipropylethanolamine And trialkanolamines such as N,N-dialkylalkanolamines such as 1-dimethylamino-2-methyl-2-propanol, N-alkyl-N,N-dialkanolamines, and triethanolamine.
  • the catalyst serves to prevent the incomplete curing of the base coat composition, thereby improving the mechanical properties of the coating film prepared therefrom.
  • the catalyst may include, for example, an amine group-containing phosphate-based compound.
  • the ultraviolet absorber serves to improve the weather resistance of the final coating film by blocking ultraviolet light reaching the prepared coating film.
  • the ultraviolet absorber may be a benzotriazole-based ultraviolet absorber.
  • the benzotriazole-based ultraviolet absorber is ⁇ -[3-[3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1 -Oxapropyl]- ⁇ -hydroxypoly(oxy-1,2-ethanediyl)( ⁇ -[3-[3-(2H-Benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4 -hydroxyphenyl]-1-oxopropyl]- ⁇ -hydroxypoly(oxy-1,2-ethanediyl)), ⁇ -[3-[3-(2H-benzotriraz-2-yl)-5-(1,1- Dimethylethyl)-4-hydroxyphenyl]-1-oxapropyl]- ⁇ -[3-[3-[3-(2H-benzotriazol-2-
  • the leveling agent serves to impart leveling and wettability of the prepared coating film.
  • the leveling agent may be a cationic, anionic, or nonionic surfactant, and may include, for example, a nonionic surfactant.
  • the anti-foaming agent serves to suppress the generation of air bubbles generated during the manufacture of the paint and to suppress or remove phenomena such as pinholes or popping caused during the formation of the coating film.
  • the antifoaming agent may be used without particular limitation as long as it is a conventional one that can be used in the coating composition.
  • commercial products of the antifoaming agent include BYK-011, BYK-015, BYK-072 from BYK, DF-21 from Air Product, agitan 281 from Munzing, and Foamster-324 from Sannovko.
  • the wetting agent serves to improve the leveling and wettability of the coating film prepared from the composition containing the same, and is not particularly limited as long as it is commonly used in the coating composition.
  • the wetting agent may be a polyether-modified polysiloxane-based or acetylene alcohol-type wetting agent.
  • the wax serves to prevent problems such as sagging due to a slow drying rate of the coating film prepared from the composition containing the same, and is not particularly limited as long as it is commonly used in the coating composition.
  • the wax may include ethylene-vinyl-acetate-based wax.
  • the base coat composition may have a pod cup viscosity of 30 to 100 seconds based on Ford Cup 4 at 25°C, and may include 15 to 50% by weight of solids based on the total weight of the composition.
  • the base coat composition may have a pod cup viscosity of 50 to 70 seconds based on Ford Cup 4 at 25°C, and may include 20 to 30% by weight solids based on the total weight of the composition.
  • the base coat composition according to the present invention as described above can be performed at a low temperature of 120° C. or lower, which is a lower temperature than the conventional one, so it is economical to reduce the cost required during the coating process.
  • the mechanical properties of the coating film prepared from the composition in particular, excellent properties such as gloss, impact resistance, water resistance, cold resistance to chipping, and can be usefully used for coating the body.
  • functional groups such as'acid value' and'hydroxyl value' of the resin can be measured by a method well known in the art, and for example, can represent a value measured by a titration method.
  • the'weight average molecular weight' of the resin may be measured by a method well known in the art, for example, it may represent a value measured by a method of gel permeation chromatograph (GPC).
  • GPC gel permeation chromatograph
  • the'glass transition temperature' of the resin may be measured by a method well known in the art, for example, may indicate a value measured by a differential scanning calorimetry (DSC) method.
  • DSC differential scanning calorimetry
  • a base coat composition was prepared so that the viscosity was 55 seconds based on Ford Cup 4 at 25°C while stirring and mixing each component with a composition as described in Tables 1 and 2 below.
  • Example 1 Example 2
  • Example 3 Example 4
  • Example 5 Example 6
  • Example 7 Acrylic resin 25.7 26.7 29 25.7 24.6 25.7 25.7 35
  • Oxazoline-based curing agents 4 4.8 4 4 4 7 0.5
  • Silent 1 One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One
  • Example 9 Example 10 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Acrylic resin 25.7 23.4 29 29.7 - 29 26.9 Polyurethane dispersion resin 13 6.3 8.4 8.4 10 - 8 Polyester resin 5.7 12 5.7 5.7 9 8 Urethane resin 1.1 1.1 1.1 1.1 1.5 1.1 Melamine-based curing agent 2.6 2.6 - 5 5 4.2 3.4 Oxazoline-based curing agents 4 4 5 - 4 4 4 Silent 1 One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One Silent
  • the base coat compositions of Examples and Comparative Examples were coated with a thickness of 15 ⁇ m on a flat surface. Then, air was blown at 80° C. for 3 minutes, and water remaining in the coating was evaporated (dry). On the base coat, a low temperature curing type clear coating (manufacturer: KCC) was coated with a thickness of 40 ⁇ m, and cured in an oven at 100° C. for 25 minutes to form a final coating film. The appearance properties and properties of the final coating film were measured in the following manner, and the results are shown in Table 5.
  • the CF value was measured using a wave scan DOI (BYK Gardner), an automotive exterior measuring device, for the final coating film, and it was determined that the higher the CF value, the better the appearance characteristics of the coating film. Specifically, when the CF value was 65 or more, it was evaluated as excellent ( ⁇ ), good ( ⁇ ) when 60 or more and less than 65, normal ( ⁇ ) when 55 or less and less than 60, and poor ( ⁇ ) when less than 55.
  • the 20° gloss of the final coating film was measured, and when the measured gloss value was 90 or more, excellent ( ⁇ ), 88 or more, and less than 90, good ( ⁇ ), 86 or more and less than 88, normal ( ⁇ ), and less than 86, poor ( ⁇ ) It was evaluated as.
  • the base coat compositions and clear coatings of Examples 1 to 10 and Comparative Examples 1 to 5 were recoated and cured in the same manner as described above to prepare recoat films. Thereafter, the adhesion was measured by a go method on the recoat.
  • the Go method was drawn in 100 squares (2 mm ⁇ 2 mm) in width and length on the recoated film with a blade, and peeled using tape to measure adhesion. At this time, if 100 squares are 100% intact, excellent ( ⁇ ), if the remaining square is 70% or more and less than 100%, good ( ⁇ ), 50% or more and less than 70%, normal ( ⁇ ), and less than 50%, bad ⁇ ).
  • the impact resistance was evaluated by observing the surface of the final coating film. Specifically, the surface was evaluated as a crack (CRACK) or no signs of impact ( ⁇ ), a mark with a normal ( ⁇ ), and a defective or cracked final coating (x).
  • CRACK crack
  • ⁇ no signs of impact
  • ⁇ mark with a normal
  • x defective or cracked final coating
  • the adhesion was measured in the same way as the Go method of item (4), and the evaluation criteria were also applied to evaluate the water resistance of the coating film.
  • the specimen with the middle coating film was vertically hung, and the base coat compositions of Examples and Comparative Examples were coated in the same manner as described above, dried and cured, and then the surfaces of the prepared coating films were observed to evaluate the fill flow properties of the composition.
  • the flow limit film thickness is 40 ⁇ m or more, excellent ( ⁇ ), 35 ⁇ m or more and less than 40 ⁇ m, good ( ⁇ ), 30 ⁇ m or more and less than 35 ⁇ m, normal ( ⁇ ), and less than 30 ⁇ m, bad ( ⁇ ) It was evaluated as.
  • compositions of Comparative Examples 1 and 2 containing only one type of melamine-based curing agent or oxazoline-based curing agent had poor workability due to reduced curability, and the coating films prepared therefrom also had poor appearance characteristics, impact resistance and water resistance.
  • the composition of Comparative Example 3 which does not contain an acrylic resin, has disadvantageous overall physical properties.
  • the coating film prepared from the composition of Comparative Example 4, which does not contain the polyurethane dispersion resin lacks gloss, impact resistance, cold resistance chipping, and the like, thereby deteriorating overall physical properties.
  • the composition of Comparative Example 5 which does not contain a polyester resin had insufficient coating workability, and the coating film prepared therefrom had poor gloss, impact resistance and cold resistance chipping properties.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Paints Or Removers (AREA)

Abstract

La présente invention concerne une composition de couche de fond à l'eau comprenant une résine acrylique, une résine de dispersion de polyuréthane, une résine de polyester, une résine d'uréthane, un agent de durcissement à base de mélamine et un agent de durcissement à base d'oxazoline.
PCT/KR2019/016794 2018-12-14 2019-11-29 Composition de couche de fond à l'eau Ceased WO2020122486A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980081442.4A CN113166576A (zh) 2018-12-14 2019-11-29 水性面漆组合物
SG11202106183TA SG11202106183TA (en) 2018-12-14 2019-11-29 Waterborne basecoat composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180162192A KR102217675B1 (ko) 2018-12-14 2018-12-14 수용성 베이스 코트 조성물
KR10-2018-0162192 2018-12-14

Publications (2)

Publication Number Publication Date
WO2020122486A2 true WO2020122486A2 (fr) 2020-06-18
WO2020122486A3 WO2020122486A3 (fr) 2020-08-06

Family

ID=71076503

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/016794 Ceased WO2020122486A2 (fr) 2018-12-14 2019-11-29 Composition de couche de fond à l'eau

Country Status (4)

Country Link
KR (1) KR102217675B1 (fr)
CN (1) CN113166576A (fr)
SG (1) SG11202106183TA (fr)
WO (1) WO2020122486A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102634336B1 (ko) * 2022-04-21 2024-02-05 주식회사 케이씨씨 베이스 코트 조성물
KR102817059B1 (ko) * 2022-09-08 2025-06-04 주식회사 케이씨씨 수용성 베이스 코트 조성물
KR102825558B1 (ko) * 2022-10-04 2025-06-26 주식회사 케이씨씨 수용성 아크릴 에멀젼 조성물 및 이로부터 제조된 아크릴 에멀젼을 포함하는 베이스 코트 조성물
KR20260031716A (ko) * 2024-08-29 2026-03-09 주식회사 케이씨씨 수성 중도 조성물

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0158534B1 (ko) 1995-10-07 1998-12-15 한영재 폴리에틸렌 튜브 코팅용 아크릴 우레탄 조성물 및 이를 이용한 코팅 방법
KR100607725B1 (ko) * 1998-12-31 2006-12-15 주식회사 케이씨씨 자동차용 수용성 상도 도료 조성물
GB2426007B (en) * 2004-02-06 2008-07-30 Nippon Paint Co Ltd Water-based intermediate coating composition and method of forming multilayered coating film
KR101399989B1 (ko) * 2011-12-30 2014-06-30 주식회사 케이씨씨 자동차 중도용 수용성 도료 조성물 및 이를 이용한 자동차 도장 방법
KR101531569B1 (ko) * 2013-07-23 2015-06-25 주식회사 노루비케미칼 수성 도료 조성물 및 이를 사용한 도막의 형성방법
KR101857857B1 (ko) * 2016-01-29 2018-05-15 주식회사 케이씨씨 자동차 중도용 수용성 도료 조성물 및 이를 이용한 자동차 도장 방법

Also Published As

Publication number Publication date
CN113166576A (zh) 2021-07-23
WO2020122486A3 (fr) 2020-08-06
KR102217675B1 (ko) 2021-02-19
KR20200073714A (ko) 2020-06-24
SG11202106183TA (en) 2021-07-29

Similar Documents

Publication Publication Date Title
US7875684B2 (en) Thermosetting water-based paint and coating film-forming methods
WO2021066440A2 (fr) Composition de peinture transparente
KR102217675B1 (ko) 수용성 베이스 코트 조성물
WO2016195390A1 (fr) Composition de peinture hydrosoluble pour véhicule
WO2018056637A1 (fr) Composition aqueuse de peinture
WO2022211399A1 (fr) Composition de revêtement transparent de type à durcissement à basse température
WO2022211400A1 (fr) Composition de peinture transparente monocomposant durcissable à basse température
KR102263132B1 (ko) 수성 베이스 코트 조성물
WO2022240149A1 (fr) Composition de revêtement transparent
WO2020145621A2 (fr) Composition de couche de fond à base d'eau
WO2023200221A1 (fr) Composition de revêtement transparente
WO2022216029A1 (fr) Composition de revêtement transparent
WO2024054023A1 (fr) Composition de revêtement de base soluble dans l'eau
WO2024225730A1 (fr) Composition de revêtement pour amorce
WO2026049256A1 (fr) Composition aqueuse de revêtement intermédiaire
WO2022235028A1 (fr) Composition de revêtement transparent
WO2020251153A1 (fr) Composition de sous-couche de peinture
KR102796393B1 (ko) 자동차 보수용 클리어 도료 조성물
WO2020141740A2 (fr) Composition de peinture pour revêtement d'apprêt
WO2018217045A1 (fr) Kit de peinture hydrosoluble destiné à une automobile
WO2023043126A1 (fr) Composition de revêtement transparent
WO2019066439A1 (fr) Composition de revêtement transparent
WO2022270686A1 (fr) Composition de revêtement transparent
WO2021246746A1 (fr) Composition de peinture à base d'huile pour revêtement intermédiaire d'automobile
WO2023204583A1 (fr) Composition de couche de base

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19896616

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19896616

Country of ref document: EP

Kind code of ref document: A2