WO2019146911A1 - Composition de peinture transparente - Google Patents

Composition de peinture transparente Download PDF

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Publication number
WO2019146911A1
WO2019146911A1 PCT/KR2018/016058 KR2018016058W WO2019146911A1 WO 2019146911 A1 WO2019146911 A1 WO 2019146911A1 KR 2018016058 W KR2018016058 W KR 2018016058W WO 2019146911 A1 WO2019146911 A1 WO 2019146911A1
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WO
WIPO (PCT)
Prior art keywords
acrylic polyol
weight
resin
polyol resin
mgkoh
Prior art date
Application number
PCT/KR2018/016058
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English (en)
Korean (ko)
Inventor
정다은
박종윤
김지승
마충식
이중호
정진훈
이우탁
이정인
Original Assignee
주식회사 케이씨씨
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Priority to CN201880087383.7A priority Critical patent/CN111630120B/zh
Publication of WO2019146911A1 publication Critical patent/WO2019146911A1/fr

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    • 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
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/062—Copolymers with monomers not covered by C09D133/06
    • C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
    • 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
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical

Definitions

  • the present invention relates to a clear coating composition.
  • the automotive coating system can be classified into a middle coat, which basically determines the mechanical properties depending on the characteristics, a top coat on which color and appearance are important, and a top coat which can complement the final gloss, clearness and mechanical properties of the automobile.
  • the topcoat clearcoat composition applied to an automobile body is composed of a hydroxyl group-containing acrylic resin, a melamine resin and a block isocyanate resin, and additives such as a smoothing agent, a slip agent, an ultraviolet absorber and an antioxidant, Liquid type clear paint is widely used.
  • a clear paint prepared using an existing hydroxyl group-containing acrylic resin there is a disadvantage that the paint adhesion on the water-soluble base paint is poor and the chemical resistance such as acid rain is weak.
  • 0576447 focuses on the development of a system capable of improving the acid resistance while maintaining the conventional acrylic polyol resin, melamine resin and block isocyanate and the curing system of the paint, Minimizes the melamine content, maximizes the content of characteristic block isocyanate, and exerts excellent effects in acid resistance and recoat adhesion by applying epoxy resin, has excellent scratch resistance and water resistance, and minimizes yellowing due to impurities And developed an automotive solvent type one-component transparent top coating composition excellent in acid resistance and coating film appearance quality.
  • the one-component clearcoat system using the epoxy functional group has a fundamental problem that the stability of the acid-epoxy itself is poor and the storage stability is poor, and gradually becomes gelled when not used immediately after the production. Also, when applied to a water-soluble topcoat, the water-soluble topcoat may react with an amine applied to the basecoat to cause yellowing.
  • Korean Patent Laid-Open No. 2006-0119012 discloses a method for solving the problem of a one-component transparent top coating, which comprises a main part containing an acrylic polyol main resin containing a hydroxyl group, an acrylic polyol auxiliary resin having a diurea group and a solvent and a hexamethylene diisocyanate tri 2-part type automotive coating composition comprising a curing agent part containing an isophorone diisocyanate trimer, an isophorone diisocyanate trimer and a solvent.
  • This composition can impart excellent appearance and mechanical properties, compatibility with a water-soluble topcoat, delamination and clarity.
  • the two-part clear paint is harmful to health by the use of isocyanate, and when exposed to moisture, undesired side reactions may occur due to moisture, and there is a disadvantage that the pot life is short.
  • the present invention provides a clear coating composition.
  • the present invention provides a one-pack clear coating composition
  • a one-pack clear coating composition comprising at least one acrylic polyol resin, a modified acrylic polyol resin produced by the reaction of an acrylic resin having a carboxyl group and a hydroxyl group with glycidyl ester, and a curing agent.
  • the clear coating composition according to the present invention is excellent in weather resistance and chipping resistance and is superior in image clarity and scratch resistance in high gloss coating as compared with conventional one-pack coating compositions.
  • the present invention provides a clear coating composition.
  • the clear coating composition of the present invention comprises at least one acrylic polyol resin, a modified acrylic polyol resin produced by the reaction of an acrylic resin having a carboxyl group and a hydroxy group with glycidyl ester, and a curing agent.
  • the clear coating composition of the present invention comprises at least one acrylic polyol resin.
  • the acrylic polyol resin used in the present invention can improve the appearance and mechanical properties of the coating.
  • the acrylic polyol resin may be polymerized using an acrylic monomer containing a hydroxyl group.
  • the hydroxy group-containing acrylic monomer may be, for example, monohydroxyalkyl (meth) acrylate, dihydroxyalkyl (meth) acrylate, lactone (meth) acrylate, hydroxy alicyclic .
  • the hydroxy group-containing acrylic monomer may be copolymerized with a monomer such as styrene, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate or mixtures thereof.
  • the content of the acrylic polyol resin may be 30 wt% to 70 wt%, 30 wt% to 60 wt%, or 30 wt% to 50 wt% based on the total weight of the clear coating composition.
  • the content of the acrylic polyol resin is less than 30% by weight, the chemical properties such as chemical resistance are impaired and the appearance improving effect is poor.
  • the content exceeds 70% by weight the coating film becomes too hard, .
  • the glass transition temperature (T g ) of the acrylic polyol resin may be 10 ° C to 50 ° C. If the glass transition temperature is lower than 10 ° C, the dryness of the coating film may become poor. If the glass transition temperature is higher than 50 ° C, the hardness of the coating film may increase, and the impact resistance may be weakened.
  • the acrylic polyol resin of the present invention may comprise two or more kinds of acrylic polyol resins having different viscosities, wherein the two acrylic polyol resins have a viscosity at 25 ° C of from 950 cP to 2,400 cP, And a second acrylic polyol resin having a viscosity at 25 DEG C of 20 cP to 55 cP.
  • the first acrylic polyol resin acts as a main resin in the clear coating composition and has an acid value of 5 mgKOH / g to 15 mgKOH / g, a hydroxyl value of 120 mgKOH / g to 170 mgKOH / g, a glass transition temperature of 10 Deg.] C to 20 < 0 > C, and the weight average molecular weight may be 10,000 g / mol to 30,000 g / mol, but is not limited thereto.
  • the first acrylic polyol resin may have a solid content of 55% by weight to 70% by weight and 58% by weight to 61% by weight.
  • the first acrylic polyol resin may be contained in an amount of 20 wt% to 69.9 wt%, 20 wt% to 69 wt%, and 25 wt% to 69 wt% based on the total weight of the clear paint composition.
  • the content of the first acrylic polyol resin is less than 20% by weight, the chemical properties such as chemical resistance are deteriorated.
  • the content is more than 69.9% by weight, the coating film becomes too hard, have.
  • the second acrylic polyol resin acts as a leveling agent in the clear paint composition and has an acid value and a hydroxyl value of 0 mgKOH / g, a glass transition temperature of 10 ° C to 50 ° C, a weight average molecular weight of 3,000 g / mol to 15,000 g / mol , And the solid content may be 40 wt% to 60 wt% and 49 wt% to 51 wt%.
  • the second acrylic polyol resin may be contained in an amount of 0.1% by weight to 30% by weight based on the total weight of the clear paint composition, and may be contained in an amount of 1% by weight to 10% by weight and 1% by weight to 5% by weight. If the content of the second acrylic polyol resin is less than 0.1% by weight, the surface of the paint may not be smooth and the appearance may become poor. When the content is more than 30% by weight, the physical properties of the coating film may be deteriorated.
  • the clear coating composition of the present invention comprises a modified acrylic polyol resin.
  • the modified acrylic polyol resin is added as an auxiliary resin in the clear paint composition in addition to the above-mentioned one or more acrylic polyol main resins to improve the gloss, image clarity (DOI) and scratch resistance of the formed coating film.
  • the modified acrylic polyol resin may be produced by the reaction of an acrylic resin having a carboxyl group and a hydroxyl group with a glycidyl ester.
  • the acrylic resin having a carboxyl group and a hydroxy group may be prepared by polymerizing an ethylenically unsaturated monomer, a non-functional acrylic monomer, an acrylic monomer containing a carboxyl group, and an acrylic monomer containing a hydroxy group.
  • the ethylenically unsaturated monomer may be selected from the group consisting of styrene, methyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, (Meth) acrylate, benzyl (meth) acrylate, isobonyl (meth) acrylate, or lauryl (meth) acrylate.
  • the ethylenically unsaturated monomers may be monomers May be contained in an amount of 10 wt% to 16 wt% based on the total amount, and may be included in an amount of 11 wt% to 12 wt%.
  • the content of the ethylenically unsaturated monomer is less than 10% by weight, it affects the gloss and the appearance is deteriorated.
  • the content of the ethylenically unsaturated monomer is more than 16% by weight, long-term weatherability may be lowered when applied to a coating.
  • the non-functional acrylic monomer is not particularly limited as long as it does not adversely affect the acrylic polyol resin, but is preferably selected from the group consisting of alkyl (meth) acrylate, cycloalkyl (meth) acrylate and bicycloalkyl (meth) It can be more than one.
  • non-functional acrylic monomer examples include methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tertiary butyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate
  • Acrylates such as methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, tertiary butyl acrylate, 2-ethylhexyl acrylate, n-butyl acrylate, Octyl acrylate, isobornyl acrylate, cyclohexyl acrylate, and the like, but not limited thereto.
  • the non-functional acrylic monomer may be contained in an amount of 55 wt% to 62 wt% based on the total amount of the monomers used to produce the acrylic resin, and may be included in an amount of 59 wt% to 62 wt%.
  • the content of the non-functional acrylic monomer is less than 55% by weight, the weatherability of the acrylic monomer may be decreased due to the increase of the functional acrylic monomer.
  • the amount of the acrylic monomer is less than 62% by weight, The scratch resistance may be poor.
  • the monomer containing a carboxyl group may be at least one selected from the group consisting of benzoic acid, cyclohexanecarboxylic acid, 2-ethylhexanoic acid, caproic acid, caprylic acid, capric acid, lauric acid, natural and synthetic fatty acids, acrylic acid, methacrylic acid, , Crotonic acid, phthalic acid, isophthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, cyclohexanedicarboxylic acid, maleic acid, fumaric acid, malonic acid, succinic acid, glutaric acid, adipic acid, azelaic acid, Acid, sebacic acid, or dodecanedioic acid may be used, but the present invention is not limited thereto.
  • the carboxyl group-containing monomer may be contained in an amount of 4 wt% to 7 wt% based on the total amount of the monomers used for preparing the acrylic resin, and may be included in an amount of 5 wt% to 6.2 wt%.
  • the content of the carboxyl group-containing monomer is less than 4% by weight, the viscosity is low and scratch resistance is problematic.
  • the content is more than 7% by weight, the hydrogen bond between the acrylic resin or acrylic resin increases and the viscosity increases.
  • the hydroxyl group-containing monomer may be selected from the group consisting of 2-hydroxyethyl methacrylate, hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, Acrylate, caprylic methacrylate, caprolactone acrylate, caprolactone methacrylate, 2,3-dihydroxypropyl acrylate, 2,3-dihydroxypropyl methacrylate, or 4-hydroxymethylcyclohexyl- Methyl acrylate, and the like, but is not limited thereto.
  • the hydroxyl group-containing monomer may be contained in an amount of 15 to 22% by weight, and 18 to 22% by weight based on the total amount of the monomers used for preparing the acrylic resin.
  • the content of the hydroxyl group-containing monomer is less than 15% by weight, the crosslinking density of the coating film is lowered to lower the physical properties of the coating film.
  • the content exceeds 22% by weight the crosslinking density is increased to improve physical properties of the coating film, There is a problem that the spreadability is lowered and the compatibility with other compositions is deteriorated and the appearance of the coating film becomes poor.
  • An organic solvent or an initiator may further be used for the production of the acrylic resin.
  • the type of the organic solvent is not particularly limited and includes, for example, hydrocarbon solvents such as toluene, xylene, or xylene; Ketone solvents such as methyl ethyl ketone, methyl propyl ketone, methyl butyl ketone, or ethyl propyl ketone; Ester solvents such as methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate, ethyl ethoxypropionate, or t-butyl peroxyacetate; Or an alcohol solvent such as n-butanol, propanol, butyl alcohol, or 1-methoxy-2-propanol.
  • hydrocarbon solvents such as toluene, xylene, or xylene
  • Ketone solvents such as methyl ethyl ketone, methyl propyl ketone, methyl butyl ketone, or eth
  • the initiator may be a radical polymerization initiator, and the kind of the initiator is not particularly limited, and examples thereof include 2,2'-azobis (2-methylbutylonitrile), 2,2'-azobisisobutyl Ethylhexanoate, tertiary butyl peroxyacetate, tertiary amyl peroxy-2-ethylhexyl peroxy-2-ethylhexanoate, dodecyl peroxybenzoate, Hexanoate, ditertiary amyl peroxide, cumyl hydroperoxide, or dicumyl peroxide, and the like.
  • 2,2'-azobis (2-methylbutylonitrile) 2,2'-azobisisobutyl Ethylhexanoate
  • tertiary butyl peroxyacetate tertiary amyl peroxy-2-ethylhexyl peroxy-2-ethylhexanoate
  • the initiator may be contained in an amount of 1 wt% to 7 wt% based on the total amount of the monomers used to produce the acrylic resin, and may be included in an amount of 5 wt% to 7 wt% and 6 wt% to 7 wt% .
  • the content of the initiator is less than 1% by weight, the degree of polymerization may be low and the physical properties may be deteriorated. If the content of the initiator is more than 7% by weight, the appearance of the coating film may become poor due to over-
  • the glycidyl ester has a chemical structure represented by the following formula (1).
  • R is an alkyl group having 1 to 30 carbon atoms.
  • R is And R 1 and R 2 are each independently an alkyl group having 1 to 10 carbon atoms.
  • the dot ( ) Means a position at which a substituent is bonded to a main chain.
  • the alkyl group may be linear or branched and is selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert- butyl, sec- N-pentyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl- Methylhexyl, cyclopentylmethyl, cyclohexylmethyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, 1,1-dimethylpropyl, isohexyl, 4-methylhexyl, 5-methylhexyl and the like, but is not limited thereto.
  • the glycidyl ester may be contained in an amount of 6 wt% to 12 wt% based on the total amount of the monomers used to produce the acrylic resin, and may be included in an amount of 10 wt% to 12 wt%.
  • the content of the glycidyl ester is less than 6% by weight, reaction with the acrylic resin may be insufficient, which may cause problems in the scratch resistance and weatherability of the coating material. If the glycidyl ester content is more than 12% by weight, A problem may arise in the appearance of the battery.
  • the glycidyl ester may react with the acrylic resin having a carboxyl group and a hydroxyl group to cause a ring opening polymerization reaction of the epoxy group of glycidyl.
  • the modified acrylic polyol resin in which the carboxyl group of the acrylic resin is modified with glycidyl ester is used as the auxiliary resin in the clear coating composition of the present invention, whereby the storage stability of the coating is ensured and the glass transition temperature (T g )
  • T g glass transition temperature
  • the weight average molecular weight of the modified acrylic polyol resin may be 5,000 g / mol to 15,000 g / mol, but is not limited thereto.
  • the modified acrylic polyol resin is contained in an amount of 10 wt% to 25 wt% based on the total weight of the clear coating composition.
  • the content of the modified acrylic polyol resin is less than 10% by weight, the effect of improving the appearance of the paint is not exhibited. If it exceeds 25% by weight, the flowability and leveling of the paint are poor.
  • the modified acrylic polyol resins may be less than or equal to the glass transition temperature (T g) that is less than or equal to 0 °C, more than -10 °C 0 °C or less, more than -5 °C 0 °C.
  • T g glass transition temperature
  • the modified acrylic polyol resin may have a hydroxyl value of 100 mgKOH / g to 150 mgKOH / g and may have a hydroxyl value of 100 mgKOH / g to 120 mgKOH / g.
  • the hydroxyl value of the modified acrylic polyol resin is less than 100 mgKOH / g, adherence is poor and weather resistance is adversely affected, and when the hydroxyl value is more than 150 mgKOH / g, the appearance of the modified acrylic polyol resin is deteriorated .
  • the modified acrylic polyol resin may have an acid value of 10 mgKOH / g to 15 mgKOH / g. If the acid value of the modified acrylic polyol resin is less than 10 mgKOH / g, the adhesion of the paint deteriorates, and if the acid value exceeds 15 mgKOH / g, the appearance of the paint deteriorates.
  • the modified acrylic polyol resin has a viscosity of 70 cP to 110 cP at 25 ⁇ .
  • the viscosity of the modified acrylic polyol resin satisfies the above range, flow properties and leveling of the prepared clear coating composition are enhanced, and excellent appearance of the coated film can be obtained.
  • the viscosity of the modified acrylic polyol resin at 25 ⁇ is less than 70 cp, scratch resistance, gloss and weatherability of the paint become poor.
  • the viscosity exceeds 110 cp, the chipping resistance becomes poor.
  • the clear paint composition of the present invention may further comprise a polyester polyol resin.
  • polyester polyol resin When the polyester polyol resin is mixed with an acrylic polyol resin, it is possible to improve the flexibility of the coating film and the paint adhesion, and the gloss and appearance The quality can be improved.
  • the polyester polyol resin may be one prepared by condensation reaction of an acid monomer and an alcohol monomer.
  • it can be produced by dehydration condensation reaction of dibasic acid (adipic acid) with glycol (Glycol) or triol, and the property and physical properties of the polyester polyol are determined by the acid , Kind of polyol, and molecular weight.
  • the polyester polyol resin may be contained in an amount of 1 wt% to 10 wt% based on the total weight of the clear paint composition, and may be contained in an amount of 1 wt% to 5 wt%.
  • the polyester polyol resin has a resin solid content of 60 to 80% by weight, a viscosity at 25 DEG C of 1,500 to 3,500 cP, an acid value of 20 to 25 mgKOH / g, a hydroxyl value of 130 mgKOH / g to 150 mg KOH / g, a glass transition temperature of 0 ° C to 10 ° C, and a weight average molecular weight of 3,000 g / mol to 8,000 g / mol.
  • the physical properties of the polyester polyol resin satisfy the above ranges, the flexibility of the coating film and the paint adhesion can be improved, and the gloss and appearance quality of the coating film can be improved.
  • the clear coating composition of the present invention comprises a curing agent.
  • the curing agent used in the present invention can be used without limitation as long as it can cure the hydroxy group of the acrylic polyol resin or the modified acrylic polyol resin.
  • the curing agent may be at least one selected from a melamine compound and a urethane compound.
  • the kind of the melamine compound is not particularly limited, but may be, for example, hexamethylol melamine, hexamethoxymethyl melamine, or hexabutoxymethyl melamine.
  • the melamine compound has a solids content of 56 to 60 wt%, a viscosity at 25 DEG C of 600 mPa ⁇ s to 1,000 mPa ⁇ s, a hue of 50 or less, an acid value of 1 mgKOH / g or less,
  • the molecular weight may be from 1,000 g / mol to 4,000 g / mol.
  • the urethane compound can be used without limitation as long as it can be used for a clear paint, and can be produced by reacting an alcohol with a polyisocyanate.
  • the alcohol may be at least one selected from the group consisting of ethylene glycol, 1,2-propylene glycol, 1,4-propylene glycol, 1,5-pentanediol, 1,2-butanediol, 1,2-hexanediol, bisphenol A, bisphenol F, A, or benzene diol, and the like.
  • the polyisocyanate may be an aliphatic or aromatic isocyanate, and may be an aliphatic polyisocyanate selected from the group consisting of tetramethylene diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane-4,4'-diisocyanate and isophorone diisocyanate; 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, p-phenylene isocyanate, diphenylmethane-4,4'-diisocyanate, polymethylene polyphenyl isocyanate, and triphenylmethane- Aromatic polyisocyanate selected from the group consisting of 4 "-triisocyanate; Or a mixture thereof.
  • the solid content of the urethane compound is 73% by weight to 77% by weight, the viscosity at 25 ° C is 2,800 mPa ⁇ s to 5,800 mPa ⁇ s, and the hue can be 100 Hazen or less.
  • the curing agent may be included in an amount of 20% by weight to 50% by weight based on the total weight of the clear coating composition. If the content of the curing agent portion is less than 20% by weight, the physical properties such as hardness and solvent resistance may be affected by incomplete curing when reacted with the main resin. If the content is more than 50% by weight, Etc., and the unreacted curing agent may remain in the coating material, which may adversely affect other physical properties.
  • the clear coating composition of the present invention may contain an organic solvent.
  • the organic solvent is not particularly limited as long as it does not pose a problem in the polymerization reaction of the acrylic polyol resin, and examples thereof include aromatic hydrocarbon solvents such as toluene, xylene, and xylene; Ketone solvents such as dimethyl ketone, methyl ethyl ketone, methyl propyl ketone, methyl butyl ketone, ethyl propyl ketone, methyl isobutyl ketone, or methyl aryl ketone; Ester solvents such as methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, methyl cellosolve acetate, cellosolve acetate, butyl cellosolve acetate, or carbitol acetate; Or an alcohol-based solvent such as n-propanol, isopropanol, n-butanol, isobutanol, or terti
  • the organic solvent may be contained in an amount of 5% by weight to 20% by weight based on the total weight of the clear coating composition. If the content of the organic solvent is less than 5% by weight, it may be difficult to produce the coating material. If the content is more than 20% by weight, the coating workability may be deteriorated.
  • the clear coating composition of the present invention may further comprise additives.
  • the additive may include at least one member selected from the group consisting of a surface conditioner, a light stabilizer, a weathering additive, a drying agent, an appearance control agent, a defoaming agent, and an ultraviolet absorber.
  • the additive may be included in an amount of 0.1 wt% to 5 wt% based on the total weight of the clear paint composition.
  • Solid content 73 wt% to 77 wt%, viscosity at 25 ⁇ : 2,800 mPa ⁇ to 5,800 mPa,, color: less than 100 hazen, appearance: clear
  • Nozzle diameter 1.5 mm, air pressure: 4.5 kgf / cm2
  • the physical properties of the coating film were measured after baking at 130 ° C for 20 minutes.
  • Gloss indicates the gloss quality level of the coating and evaluated by KCC-7-28-0022 method according to MS653-01 SPEC.
  • the hardness was evaluated by the KCC-7-28-3000 method according to MS653-01 SPEC as a measure of hardness of the coating.
  • the pressing force of the pencil on the specimen should be about 500 g / cm2.
  • the chipping resistance was evaluated by the method of MS653-01 SPEC to evaluate the resistance to chipping caused by the stone of the film.
  • the modified acrylic polyol resin was contained in an amount of less than 10% by weight as in Comparative Example 6, or the modified acrylic polyol resin was contained in an amount of less than 25%
  • the paint using the one-pack clear coating composition containing the modified acrylic polyol resin of the present invention has excellent image clarity, scratch resistance, gloss and weatherability.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
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  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne une composition de peinture transparente de type à un seul composant comprenant : un ou plusieurs types de résines de polyol acrylique; une résine de polyol acrylique modifiée générée par la réaction d'un ester glycidylique et d'une résine acrylique ayant un groupe carboxyle et un groupe hydroxyle; et un agent de durcissement.
PCT/KR2018/016058 2018-01-24 2018-12-17 Composition de peinture transparente WO2019146911A1 (fr)

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CN201880087383.7A CN111630120B (zh) 2018-01-24 2018-12-17 透明油漆组合物

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KR1020180008964A KR102080936B1 (ko) 2018-01-24 2018-01-24 클리어 도료 조성물
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KR102340545B1 (ko) * 2019-10-02 2021-12-20 주식회사 케이씨씨 클리어 도료 조성물
KR102389713B1 (ko) * 2022-02-17 2022-04-22 율천공업(주) 농기계의 상도 도장방법

Citations (5)

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KR20130013452A (ko) * 2011-07-28 2013-02-06 주식회사 케이씨씨 자동차 보수용 투명 도료 조성물
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