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
  • C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
  • C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
  • C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
  • C09D127/16—Homopolymers or copolymers of vinylidene fluoride
• • 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

Definitions

• the present invention relates to a decorative coating composition, particularly a coating composition useful for architecturally decorative materials, which comprises a PVDF resin, an acrylic resin and a solvent comprising isophorone.
• Wood and marble are common building decoration materials widely used in modern architecture.
• the marble is non-renewable resources, and natural wood regeneration rate is far behind the rate of consumption.
• large-scale constructions including a number of buildings, especially high-rise buildings consume a lot of natural wood and marble, leading to continuous reduction of their natural reserves.
• regional natural environment is inevitably severely damaged and polluted during the mining process.
• use of natural marble for decoration outside the high-rise buildings beyond six-story is banned in some local laws and regulations. Therefore, choosing other suitable building materials is imperative.
• An alternative is use of industrial paint coated on a metal substrate to simulate wood and marble texture.
• This new type of building decoration for the substrate provides visually real natural wood and marble lines, playing the same role in architectural decoration, with simple production process and low cost, which is favorable for reducing construction costs. If widely used, it will greatly reduce the demands for natural wood and marble, so as to better protect natural resources and natural environment.
• the coating for simulating wood and marble texture (1) still maintain excellent hiding power and color development in the case of very thin film thickness, with clearly visible color contours, and realistic texture simulation; (2) overcome the problematic weatherability since the products are mostly used for outdoor decoration; and (3) match with other coatings as to interlayer adhesion and flexibility in the case of multi-coating and multi-baking.
• the coating composition and coating system of the present invention solve the above technical problems and meet the technical requirements well.
• the present invention provides a coating composition comprising a PVDF resin, an acrylic resin and a solvent comprising isophorone.
• the coating composition is used as a texturing coating composition in a coating system described below.
• the present invention also provides a coating system comprising one or more texturing coating compositions, i.e., the above-described coating compositions of the present invention.
• the coating system can also comprise a primer, a pigmented basecoat, and a clearcoat.
• the present invention also provides a method for applying the coating system on a substrate, comprising applying a primer on the substrate, and baking the primer to generate a cured primer layer; applying a pigmented basecoat on the cured primer layer, and baking the basecoat to generate a cured pigmented basecoat layer; applying one or more layers of a texturing coating composition on the cured pigmented basecoat layer; and applying a clearcoat on the one or more layers of the texturing coating composition, and baking both the texturing coating composition and the clearcoat.
• the present invention provides a coating composition comprising a PVDF resin, an acrylic resin and a solvent comprising isophorone.
• the coating composition can also comprise a pigmented filler.
• the PVDF resin used in the present invention refers to a polyvinylidene fluoride resin, which is a vinylidene fluoride homopolymer.
• the PVDF resin combines the characteristics of fluororesins and general-purpose resins, having excellent piezoelectricity, dielectric, thermoelectric and other special properties, in addition to excellent chemical resistance, high temperature resistance, oxidation resistance, weather resistance, and radiation-resistant properties.
• Its chemical structure comprises a fluorine-carbon bond, and such a short length of the bond can form the most stable and solidest bonding with hydrogen ions.
• fluorocarbon coatings have special physical and chemical properties, which not only have strong wear resistance and impact resistance, but also have high resistance to fading and anti-UV properties in extremely hard and harsh environments.
• PVDF resins available for use in the present invention include, for example, Kynar 500 available from Arkema Corporation or Hylar 5000 from Solvay Plastics, and other similar PVDF resins that are commercially available.
• the acrylic resin used in the present invention refers to a polymer which is usually derived from an acrylic acid or methacrylic acid type monomer. Further, a mixture of copolymers or polymers derived from acrylic acid or methacrylic acid type monomers can be used.
• a copolymer resin from acrylic or methacrylic acid type monomers listed below or a mixture thereof: acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, amyl methacrylate, hexyl methacrylate, acrylamide, N-methylolacrylamide, N-butoxymethyl acrylamide and/or N-isobutoxymethylacrylamide.
• the acrylic polymer may also contain hydroxyl groups, which are generally derived from hydroxy-substituted acrylic or methacrylic acid esters. Examples thereof include hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate and/or hydroxybutyl methacrylate and the like.
• the acrylic polymer may also be copolymers, polymers or a mixture thereof derived from acrylic or methacrylic acid type monomers with other polymerizable monomers.
• the other polymerizable monomers include those commonly used in the art such as styrene, acrylonitrile and the like.
• the weight average molecular weight of the acrylic polymer may be at least 5, 000 g/mole, such as 15, 000 to 120,000 g/mole.
• the acrylic polymer typically has an acid value of 70-110 mg KOH/g, such as 80-100 mg KOH/g; a hydroxyl value of 10-40 mg KOH/g, such as 20-30 mg KOH/g; and a glass transition temperature of -20 to +100°C, such as +20 to +70°C.
• thermoplastic acrylic resin is used, which is a type of thermoplastic resins obtained by polymerization of acrylic acid, methacrylic acid and its derivatives (e.g., esters, nitriles, amides) . It can be repeatedly softened upon heating and solidified upon cooling.
• the acrylic resin is generally a linear polymer compound, and can be a homopolymer or copolymer, having good physical and mechanical properties, weather resistance, chemical resistance and excellent water resistance, as well as high light retention and color.
• the molecular weight of the thermoplastic acrylic resin used in the coating industry generally ranges from75, 000 to 120, 000.
• Thermoplastic acrylic resins which can be used in the present invention include, for example, B44, B60 and B66 provided by Dow Chemical, BR-85 and BR-116 supplied by Mitsubishi Chemical, etc., and many other similar thermoplastic acrylic resins that are commercially.
• the PVDF resin comprises 5-15%by weight, for example 6-14%by weight, 7-13%by weight, 8-12%by weight, or 9-11%by weight, based on the total weight of the coating composition of the present invention.
• the acrylic resin comprises 5-15%by weight, for example 6-14%by weight, 7-13%by weight, 8-12%by weight, or 9-11%by weight, based on the total weight of the coating composition of the present invention.
• the PVDF resin and the acrylic resin present in the coating composition of the present invention is in a ratio by weight of 1: 0.33-3, for example 1: 0.4-2.5, 1: 0.5-2, 1: 0.8-1.2 or 1: 1.
• the coating composition of the present invention includes a solvent such as an organic solvent.
• suitable organic solvents include aliphatic hydrocarbons such as solvent oils and high flash point VM &P naphthas; aromatic hydrocarbons such as benzene, toluene, xylene and high boiling aromatic hydrocarbons, including aromatic hydrocarbons such as S-100C, S-100C, S-150, S-180, S-200 provided by HUALUN Chemical Industrial Co., Solvesso TM 100, Solvesso TM 150, Solvesso TM 200 supplied by ExxonMobil Chemical; alcohols such as ethanol, n-propanol, isopropanol, n-butanol and the like; ketones such as acetone, cyclohexanone, isophorone, methyl isobutyl ketone and the like; esters such as ethyl acetate, butyl acetate and the like; glycols such as ethylene glycol; glycol
• the solvent that can be used in the coating composition preferably includes a ketone-based solvent such as an aliphatic cycloalkylketone, an aliphatic cycloalkenylketone and the like, and specifically includes isophorone, cyclohexanone, etc..
• the solvent that can be used in the coating composition preferably includes one or more solvents selected from the group consisting of xylene, S-100, and Solvesso TM 100, in addition to the ketone solvent.
• solvents that can be used in the coating composition include isophorone, cyclohexanone, xylene, S-100, Solvesso TM 100 and/or a mixed solvent of one or more thereof.
• the solvent comprises 40-80%by weight, e.g., 45-75%by weight, 50-70%by weight, 55-65%by weight, 58-62%by weight, or 60 %by weight based on the total weight of the coating composition of the present invention.
• the coating composition of the present invention further comprises a pigmented filler.
• the pigmented filler is a kind of colored fine granular powder materials, which generally can be dispersed in water, oil, solvents, resins and other media. It has hiding power and tinting power, is relatively stable to light, commonly used in the preparation of coatings, inks, and colored plastic and rubber, and plays the role of coloring and filling. Common pigmented fillers include titanium dioxide, iron red, iron yellow or iron black and so on.
• the coating composition of the present invention having different colors can be obtained by adding different pigmented fillers.
• Realistic wood and marble textures can be obtained by applying one or more layers of the coating composition of the present invention in different colors onto a substrate in a suitable pattern.
• the pigmented filler comprises 5-35%by weight, for example 10-30%by weight, 15-25%by weight, or 18-22%by weight, based on the total weight of the coating composition of the present invention.
• the coating composition of the present invention may also include one or more standard additives commonly used in the field of coatings manufacture, including, for example, plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, antifoaming agents, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers, fillers, abrasive carriers, and other common adjuvants, or combinations of the foregoing.
• plasticizers plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, antifoaming agents, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers,
• the coating composition of the present invention can be applied to any substrate known in the art, for example, automotive substrates, industrial substrates, packaging substrates, building substrates, wood flooring and furniture, apparel, electronic products such as electronic product housings and circuit boards, glass and transparent substrates, sports equipment such as golf balls and the like. These substrates may be metallic or non-metallic.
• the metal substrate includes, for example, tin, steel, tin-plated steel, tin-free steel, tinplate, chromium passivated steel, galvanized steel, aluminum, aluminum foil, magnesium, and/or magnesium alloys.
• Non-metallic substrates include polymers, plastics, polyesters, polyolefins, polyamides, cellulose, polystyrene, polyacrylic acid, poly (ethylene naphthalate) , polypropylene, polyethylene, Nylon, EVOH, polylactic acid, other “green” polymeric substrates, poly (ethylene terephthalate) (PET) , polycarbonate, polycarbonate acrylonitrile butadiene styrene (PC/ABS) , polyamides, wood, plywood, wood composite panels, particleboard, medium density fiberboard, cement, stone, glass, paper, cardboard, textiles, leather including synthetic leather and natural leather and other nonmetallic substrates.
• the above substrates may have been treated in certain manners in order to achieve visual and/or color effects.
• Preferred substrates in the present invention include metal substrates such as magnesium alloys, aluminum alloys, stainless steels and tinplates.
• the coating composition of the present invention can be applied by any standard process in the art such as electrocoating, spraying, electrostatic spraying, dip coating, roll coating, brush coating, etc., preferably by a roll coating process.
• the coating composition of the present invention is cured upon application to yield a film thickness of from 1 to 10 microns, such as from 1 to 8 microns, from 1 to 6 microns, from 1 to 4 microns, or from 1 to 2 microns.
• each layer of the coating composition of the present invention may have the same color or different colors.
• the present invention provides a coating system comprising one or more layers of the coating composition of the present invention.
• one or more layers of the coating composition of the present invention are used in the coating system of the present invention as a texturing coating composition.
• the coating system of the present invention further comprises a primer, a pigmented basecoat, and a clearcoat.
• coating system when used in the context of the present invention refers to a coating product comprising one or more coating compositions in which each coating composition is independently applied.
• the primer of the present invention comprises a saturated polyester resin, which is a class of polyester resins and is generally formed by polycondensation of saturated dibasic acids and diols, including linear and branched-chain saturated polyester resin.
• saturated polyester resin is a terminal hydroxyl functional group-containing polyester resin which is crosslinked with a resin such as an isocyanate or an amino resin to form a film upon curing.
• the saturated polyester resin is mainly used in the production of coil coatings, with excellent adhesion properties and good balance between hardness and flexibility. At the same time, the coating layer has excellent flexibility, and good wetability to pigments, is not prone to yellowing and has high gloss and resistance to excessive baking.
• Saturated polyester resin useful for the primer has outstanding features like good adhesion, versatility, weather resistance and flexibility.
• Saturated polyester resins which may be used in the present invention generally have an acid value of ⁇ 10 mg KOH/g, such as ⁇ 8 mg KOH/g, ⁇ 6 mg KOH/g; a hydroxyl value of 50-100 mg KOH/g, such as 60-90 mg KOH/g, 70-80 mg KOH/g; and a solid content of 50-70%by weight, such as 54-66%by weight, 58-62%by weight.
• Saturated polyester resins which can be used in the present invention include saturated polyester resins produced, for example, by Sanben Chemicals, Euiomada Paint and the like, and specific models include HC98315 , HC98415, HC98515, etc., and other similar commercially available saturated polyester resins.
• the primer of the present invention comprises 30-55%by weight, for example 35-50%by weight or 40-45%by weight of saturated polyester resin, based on the total weight of the primer of the present invention.
• the primer of the present invention further comprises an amino resin, which is a type of resin obtained by polycondensation of an amino group-containing compound such as urea, melamine or benzoguanamine with formaldehyde and an alcohol.
• the amino resin can be used as a cross-linking agent in coating composition, and the coating film has excellent gloss, color retention, hardness, chemical resistance, water and weather resistance with the amino resin as the cross-linking agent.
• Amino resins which can be used in the present invention include, for example, MR-603 manufactured by Changchun Chemical Co., and the like, and other similar amino resins which are commercially available.
• the primer of the present invention comprises 1-6%by weight, such as 2-5%by weight or 3-4%by weight of an amino resin, based on the total weight of the primer of the present invention.
• the primer of the present invention comprises a solvent, such as an organic solvent.
• suitable organic solvents include aliphatic hydrocarbons such as solvent oils and high flash point VM &P naphthas; aromatic hydrocarbons such as benzene, toluene, xylene and high boiling aromatic hydrocarbons, including aromatic hydrocarbons such as S-100, S-100A, S-100B, S-100C, S-150, S-180, S-200 provided by HUALUN Chemical Industrial Co., Solvesso TM 100, Solvesso TM 150, Solvesso TM 200 supplied by ExxonMobil Chemical; alcohols such as ethanol, n-propanol, isopropanol, n-butanol and the like; ketones such as acetone, cyclohexanone, isophorone, methyl isobutyl ketone and the like; esters such as ethyl acetate, butyl acetate and the like; glycols such
• the solvent that may be used in the primer preferably include one or more solvents selected from the group consisting of ethylene glycol butyl ether, S-150, Solvesso TM 150, solvent oil 150, propylene glycol methyl ether acetate and n-butanol.
• the solvent comprises 5 to 35%by weight, such as 10 to 30%by weight, or 15 to 25%by weight, based on the total weight of the primer of the present invention.
• the primer of the present invention further comprises a pigmented filler.
• the primer of the present invention having different colors can be obtained by adding different pigmented fillers.
• the pigmented filler comprises 15-35%by weight, for example 18-32%by weight, 20-30%by weight, or 23-28%by weight, based on the total weight of the primer of the present invention.
• the primer of the present invention may also comprise one or more of the standard additives commonly used in the field of coating manufacture including, for example, plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, antifoaming agents, surfactants, wetting agents, dispersing agents, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers, fillers, abrasive carriers, and other common adjuvants, or combinations of the foregoing.
• plasticizers plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, antifoaming agents, surfactants, wetting agents, dispersing agents, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers
• the pigmented basecoat of the present invention comprises a fluorocarbon resin and acrylic resin.
• the fluorocarbon resin is a class of resins obtained by homopolymerization or copolymerization of fluorine-containing olefins such as tetrafluoroethylene (TFE) , vinyl fluoride (VF) , vinylidene fluoride (VDF) as monomers, or by copolymerization of such monomers with other monomers, or by self-polymerization or copolymerization of monomers containing fluorine-carbon chemical bonds in side chain, wherein the obtained molecular structure contains many C-F bonds.
• fluorine-containing olefins such as tetrafluoroethylene (TFE) , vinyl fluoride (VF) , vinylidene fluoride (VDF)
• Fluorocarbon resin-based coatings exhibit excellent weather resistance, durability, chemical resistance, corrosion resistance, heat resistance, cold resistance, abrasion resistance, insulation, non-adhesion property and stain resistance, and thus are widely useful for surface weathering protection in interior &exterior walls, roof, bridge steel structure, building curtain wall, awning surface, photovoltaic industry, and road traffic facilities.
• the fluorocarbon resins that can be used in the pigmented basecoat of the present invention are PVDF resins and there are many PVDF resins available from various manufacturers on the market.
• PVDF resins which can be used in the present invention include, for example, Kynar 500 available from Arkema or Hylar 5000 supplied by Solvay Plastics, and other similar PVDF resins commercially available.
• the PVDF resin comprises 15-40%by weight, for example 20-35%by weight or 25-30%by weight, based on the total weight of the pigmented basecoat of the present invention.
• Acrylic resins used in the pigmented basecoat of the present invention include thermosetting acrylic resins, thermoplastic acrylic resins, or mixtures of thermosetting acrylic resins and thermoplastic acrylic resins.
• the thermosetting acrylic resin is an insoluble and non-melting acrylic polymer formed by crosslinking an acrylic ester monomer (methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate, n-butyl methacrylate, etc. ) as the essential component into a network structure, also known as cross-linked or reactive acrylic resin.
• thermosetting acrylic resin with a certain functional group reacts with added melamine resin, epoxy resin, polyurethane and other functional groups to finally form a network structure for achieving the effect of being insoluble and non-melting. It overcomes the shortcomings of the thermoplastic acrylic resin, and greatly improves mechanical properties and chemical resistance performance of the coating. Many companies sell thermosetting acrylic resins in the market.
• the thermosetting acrylic resins for use in the present invention include, for example, CR-204 supplied by DSM and the like and other similar thermosetting acrylic resins that are commercially available.
• thermoplastic acrylic resins which may be used in the pigmented basecoat of the present invention include, for example, B44, B60 and B66 available from Dow Chemical, BR-85 and BR-116 supplied by Mitsubishi Chemical and other Similar acrylic resins that are commercially available.
• the acrylic resins comprise 15 to 35%by weight, for example 20 to 30%by weight or 24 to 28%by weight, based on the total weight of the pigmented basecoat of the present invention.
• the pigmented basecoat of the present invention also comprises amino resins, and the amino resins which may be used in the present invention include, for example, MR-603 manufactured by Changchun Chemical Co., and the like, and other similar amino resins that are commercially available.
• the pigmented basecoat of the present invention comprises 0.1 to 2%by weight, for example 0.4 to 1.6%by weight, or 0.8 to 1.2%by weight of an amino resin, based on the total weight of the pigmented basecoat of the present invention.
• the pigmented basecoat can also comprise pigmented fillers.
• the pigmented basecoat with added pigmented fillers typically exhibits a lighter color, such as white, light gray, light yellow, and the like.
• Common pigmented fillers include titanium dioxide, iron red, iron yellow or iron black and so on.
• the pigmented basecoat of the present invention having different colors can be obtained by adding different pigmented fillers.
• a wide variety of pigmented fillers are currently available on the market, including DuPont R960, Schott B430 or Tenova CR-880, which may be used in the pigmented basecoat of the present invention.
• the pigmented fillers comprise 5 to 40%by weight, for example 10 to 35%by weight, 15 to 30%by weight, 18 to 28%by weight, or 20 to 24%by weight, based on the total weight of the pigmented basecoat of the present invention.
• the pigmented basecoat can also comprise a solvent and the solvent that can be used in the pigmented basecoat of the present invention is as hereinbefore described.
• solvents useful in the pigmented basecoat include ketones such as acetone, cyclohexanone, isophorone, methyl isobutyl ketone, and the like and a mixed solvent thereof.
• the solvent comprises 5 to 40%by weight, for example 10 to 35%by weight, 15 to 30%by weight, 18 to 28%by weight, or 20 to 24%by weight, based on the total weight of the pigmented basecoat of the present invention.
• the pigmented basecoat of the present invention may also include one or more standard additives commonly used in the field of coating manufacture including, for example, plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, defoamers, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers, fillers, abrasive carriers, and other common auxiliaries, or combinations of the above-mentioned additives.
• plasticizers plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, defoamers, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilize
• the clearcoat of the present invention comprises a fluorocarbon resin and an acrylic resin.
• the fluorocarbon resins which can be used in the varnish of the present invention are PVDF resins, which may be commercially available from various manufacturers.
• PVDF resins which can be used in the present invention include, for example, Kynar 500 supplied by Arkema or Hylar 5000 provided by Solvay and the like, and other similar PVDF resins that are commercially available.
• the PVDF resin comprises 20-45%by weight, for example 25-40%by weight or 30-35%by weight, based on the total weight of the clearcoat of the present invention.
• the acrylic resins which can be used in the clearcoat of the present invention are thermoplastic acrylates which are commercially available from various manufacturers on the market.
• the thermoplastic acrylates which can be used in the present invention include B44, B60 and B66 provided by Dow Chemical, HC-45-6813/HCM-9815 provided by PPG, and the like, and other similar thermoplastic acrylic resins that are commercially available.
• the acrylic resin comprises 25-45%by weight, for example 30-40%by weight, or 34-38%by weight, based on the total weight of the clearcoat of the present invention.
• the clearcoat can also comprise a solvent and the solvent that can be used in the clearcoat of the present invention is as previously described.
• solvents that can be used in the clearcoat can include ketones, such as acetone, cyclohexanone, isophorone, methyl isobutyl ketone, and the like, and a mixture thereof.
• the solvent comprises 25-40%by weight, for example 28-38%by weight or 30-34%by weight, based on the total weight of the clearcoat of the present invention.
• the clearcoat of the present invention may also include one or more of the standard additives commonly used in the field of coating manufacture including, for example, plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, defoamers, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizers, fillers, abrasive carriers, and other common auxiliaries, or combinations of the above-mentioned additives.
• plasticizers plasticizers, abrasion resistant particles, membrane reinforcing particles, flow control agents, thixotropic agents, rheology modifier, catalysts, antioxidants, biocides, defoamers, surfactants, wetting agents, dispersants, adhesion promoters, clays, hindered amine light stabilizers, UV light absorbing stabilizers, stabilizer
• the present invention provides a method for applying the coating system on a substrate, comprising (1) applying a primer on the substrate, and baking the primer to generate a cured primer layer; (2) applying a pigmented basecoat on the cured primer layer, and baking the basecoat to generate a cured pigmented basecoat layer; (3) applying one or more layers of the texturing coating composition on the cured pigmented basecoat layer; and (4) applying a clearcoat on the one or more layers of texturing coating composition, and baking both the texturing coating composition and the clearcoat.
• the primer has a coating thickness of 6-8 ⁇ m, for example 5-7 ⁇ m.
• the baking temperature of 205-230°C, for example, 210-225°C or 215-220°C.
• the baking time is 30-70 seconds, for example 35-65 seconds or 40-60 seconds.
• the pigmented basecoat has a coating thickness of 16-22 ⁇ m, for example 18-20 ⁇ m.
• the baking temperature of 210-235°C, for example, 215-230°C or 220-225°C.
• the baking time is 30-70 seconds, for example 35-65 seconds or 40-60 seconds.
• the texturing coating composition has a coating thickness of 1 to 6 ⁇ m, for example 1 to 4 ⁇ m or 1 to 2 ⁇ m.
• the coating thickness of the clearcoat is 8-14 ⁇ m, for example 10-12 ⁇ m.
• the texturing coating composition and clearcoat of the present invention are co-baked at a temperature of 230-255°C, for example 235-250°C or 240-245°C with the baking time of 30-70 seconds, for example 35-65 seconds or 40-60 seconds.
• the present invention provides a coated substrate obtained by the coating method of the coating system of the present invention.
• the substrate is preferably a metal substrate, and more preferably an aluminum alloy substrate, such as an aluminum alloy substrate for construction/building.
• the primer of the coating system of the present invention was prepared according to the following formulation:
• the primer was produced by adding saturated polyester resin, ethylene glycol butyl ether and 150 solvent oil in a container in turn, stirring uniformly, adding titanium dioxide and zinc sulfate in turn, stirring for 30 minutes and then grinding the mixture with the grinder to a fineness of less than 25 micron, adding amino resin, HID resin, adhesion promoter and acid catalyst with stirring, and then remaining stirring until uniformly.
• the pigmented basecoat of the coating system of the present invention was prepared according to the following formulation:
• the acrylic resin in the above formulation was divided into three portions, which account for about 40%, about 10%and about 50%by weight of the total amount of the acrylic resin, respectively.
• Isophorone was divided into four portions, which account for about 10%, about 15%, about 60%, and about 15%by weight of the total amout of isophorone, respectively.
• About 40%of acrylic resin and about 10%of isophorone were added to a container and stirred uniformly to which titanium dioxide was added under stirring. The mixture was adequately stirred for 30 minutes after complete addition, and was ground with a grinder to fineness of less than 10 microns. After grinding, the grinder was cleaned with about 10%of acrylic resin and about 15%of isophorone. The materials were combined and cooled to 30°C for later use.
• a coating composition for use as the texturing coating composition of the coating system of the present invention was prepared according to the following formulation:
• the acrylic resin in the above formulation was divided into three portions, which account for about 40%, about 10%and about 50%by weight of the total amount of the acrylic resin, respectively.
• Isophorone was divided into three portions, which account for about 10%, about 15%, and about 75%by weight of the total amount of isophorone, respectively.
• About 40%of acrylic resin and about 10%of isophorone were added to a container in turn and stirred uniformly, followed by the addition of titanium dioxide under stirring. After completion addition, the mixture was stirred for 30 minutes and then ground by a grinder to a fineness of less than 10 microns. After grinding, the grinder was washed with about 10%acrylic resin and about 15%isophorone. The materials were combined and cooled to below 30°C for later use.
• the clearcoat of the coating system of the present invention was prepared according to the following formulation:
• Isophorone was divided into two portions, which comprise about 95%and about 5%by weight of the total isophorone, respectively.
• Acrylic resin Dow B44, acrylic resin PPG HCM-9851 and about 95 wt%of isophorone were added successively into a container and stirred well, followed by the addition of PVDF resin under stirring to a fineness of less than 30 microns. Finally, about 5 wt%of isophorone, acrylic leveling agent and matting agent were added and stirred well to give the clearcoat of the present invention.
• a standard test aluminum alloy substrate was subjected to a surface treatment, on which the primer prepared in Example 1 was uniformly coated by roll coating and baked at 215°C for 50 seconds. After the substrate was cooled, the pigmented basecoat prepared in Example 2 was uniformly coated on the cured primer followed by baking at 225°C for 50 seconds. After the substrate was cooled, the texturing coating composition prepared in Example 3 was applied on the cured pigmented basecoat. The clearcoat prepared in Example 4 was coated on the texturing coating composition followed by baking and drying at 240°C for 50 seconds to produce a coated substrate sample for test.
• the coating surface was repeatedly wiped 100 times with a medical gauze dipped in methyl ethyl ketone under the condition of one kilogram of force. It is considered to be qualified if the coating does not appear broken wear defects.
• the above test results show that the coating formed by the coating system of the present invention can be firmly adhered to an aluminum alloy substrate, and the resulting coating was excellent in wiping resistance, bending resistance and aging resistance, and the formed pattern is faithfully simulated wooden or marble texture, and fully meet the requirements.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Paints Or Removers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54947463

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (4)

Citations (6)

Family Cites Families (3)

• 2015
  • 2015-10-21 CN CN201510689227.6A patent/CN105199496A/zh active Pending
• 2016
  • 2016-10-20 WO PCT/CN2016/102644 patent/WO2017067469A1/en active Application Filing

Patent Citations (6)

Also Published As

Similar Documents

Legal Events