CN115572536B - Skin-feel coating composition and application thereof - Google Patents

Skin-feel coating composition and application thereof Download PDF

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Publication number
CN115572536B
CN115572536B CN202211332244.0A CN202211332244A CN115572536B CN 115572536 B CN115572536 B CN 115572536B CN 202211332244 A CN202211332244 A CN 202211332244A CN 115572536 B CN115572536 B CN 115572536B
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skin
feel
coating
primer
parts
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CN115572536A (en
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柯建生
陈樟
阮君冰
郑智华
王海东
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SUOFEIYA HOME COLLECTION CO Ltd
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SUOFEIYA HOME COLLECTION CO Ltd
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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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • 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
    • 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
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates

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

Abstract

The invention discloses a skin-feel coating composition and application thereof, wherein the skin-feel coating composition provided by the invention comprises a skin-feel finish; the skin feel finishing paint comprises the following raw materials in parts by weight: 50-70 parts of UV resin; 5-10 parts of UV monomer; 5-10 parts of photoinitiator; 2-6 parts of auxiliary agent; 15-25 parts of filling powder; the UV resin comprises at least one of bisphenol A epoxy acrylate, phenolic epoxy acrylate, epoxidized oil acrylate, polyester acrylic acid, polyurethane acrylic acid and pure acrylic acid; the auxiliary agent comprises a leveling agent and a defoaming agent; the viscosity of the skin feel finishing paint is 10 s-11 s. The skin-feel coating combination provided by the invention can effectively improve the temperature resistance of the skin-feel coating forming coating. The invention also provides application of the skin-feel coating combination.

Description

Skin-feel coating composition and application thereof
Technical Field
The invention relates to the technical field of coatings, in particular to a skin-feel coating composition and application thereof.
Background
Skin-feel paint, which is named for the feel of baby skin, has many advantages such as smoothness, slight elasticity, very low gloss, very fine and smooth surface, super-strong texture, self-repairability by slight scratching, stain resistance, good scratch resistance and the like.
The ultraviolet light curing paint is commonly called as UV paint, and the curing principle is that the paint absorbs ultraviolet light and then decomposes under the irradiation of ultraviolet light, free radicals are generated to crosslink with the light curing resin and the reactive diluent, and the film can be cured in an instant. Has the characteristics of environmental protection, high efficiency, low cost and the like.
The skin-feel UV paint is a paint with reduced gloss after the UV paint is photo-cured by equipment and formula adjustment based on the conventional UV paint.
The skin-feel UV coating generally requires a certain amount of filler to be added to obtain skin feel, but the skin-feel UV coating obtained by adding a large amount of filler has problems such as heat resistance, moist heat resistance, and poor cold and heat cycle resistance.
Thus, it is important to provide a novel skin-feel coating composition to overcome the above technical problems.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a skin-feel coating combination which can effectively improve the temperature resistance of a coating formed by the skin-feel coating.
The invention also provides application of the skin-feel coating combination.
According to an embodiment of the first aspect of the present invention, a skin feel coating composition is presented, comprising a skin feel top coat;
the preparation raw materials of the skin feel finishing paint comprise the following components in parts by weight:
The UV resin comprises at least one of bisphenol A epoxy acrylate resin, phenolic epoxy acrylate resin, epoxidized oil acrylate resin, polyester acrylic resin, polyurethane acrylic resin and pure acrylic resin;
The auxiliary agent comprises a leveling agent and a defoaming agent;
the viscosity of the skin feel finishing paint is 10 s-11 s.
The control method according to the embodiment of the invention has at least the following beneficial effects:
(1) According to the invention, through mutual coordination of the components, the viscosity of the obtained skin-feel finishing paint is 10-11 s, and in the process of coating the skin-feel paint combination, if the viscosity is higher than the range, the leveling effect is poor, so that defects such as orange peel pitting and the like are generated, and the skin-feel effect of the product is influenced; if the viscosity is too low, sagging phenomenon is easy to generate, and the paint film quality is affected. Within the above range, the obtained coating has a fine skin feel effect.
(2) The UV resin selected by the invention has excellent wrapping property and adhesive force, so that after the UV resin is matched with a specific part of filling powder, an excellent skin feel effect can be obtained, and meanwhile, the adhesive force, high and low temperature resistance and moisture resistance of the coating are simultaneously considered.
If the ratio of the filler powder to the UV resin exceeds the above range, the coating will have reduced properties such as adhesion;
if the ratio of the filler powder to the UV resin is below the above range, the skin feel effect of the coating is significantly reduced.
(3) After the flatting agent and the defoaming agent are added and have synergistic effect with other components, the skin feel effect and the matte effect of the coating formed by combining the skin feel coating can be obviously improved.
According to some embodiments of the invention, the skin feel finish has a viscosity of 10 to 11 seconds as measured using a paint-4 viscometer.
According to some embodiments of the invention, the UV resin is selected from bisphenol a epoxy acrylate resins and urethane acrylic resins.
Preferably, the bisphenol A epoxy acrylate resin has a viscosity of 3000 to 5000cps (60 ℃).
Preferably, the acid value of the bisphenol A epoxy acrylate resin is less than or equal to 3mgKOH/g. Preferably, the acid value is 2mgKOH/g or less.
The bisphenol A epoxy acrylate resin has the advantages of high drying speed, high hardness of the obtained film and the like.
Preferably, the urethane acrylic resin has a viscosity (60 ℃) of 2000 to 4000cps.
Preferably, the urethane acrylic resin has a functionality of 2 to 5.
The polyurethane acrylic resin has higher yellowing resistance and toughness.
According to the invention, the polyurethane acrylic resin and the bisphenol A epoxy acrylate resin are combined, so that the coating property of the skin-feel finish paint to filling powder, the adhesion to a base material, weather resistance and yellowing resistance are improved, and finally, a finish paint film with good skin-feel performance is obtained.
According to some embodiments of the invention, the UV resin is present in the skin feel top coat in a mass percentage of between 50 and 70%, it being understood that specific mass percentages may be 55%, 60%, 65% and 68%.
According to some embodiments of the invention, the UV monomers include an acryl-or methacryl-terminated vinyl polymer, styrene (CAS: 100-42-5), N-vinylpyrrolidone (CAS: 88-12-0), isooctyl acrylate (CAS: 103-11-7), hydroxyethyl acrylate (CAS: 818-61-1), isobornyl acrylate (CAS: 5888-5), triethylene glycol diacrylate (CAS: 1680-21-3), tripropylene glycol diacrylate (CAS: 42978-66-5), ethylene glycol diacrylate (CAS: 2274-11-5), polyethylene glycol (200) diacrylate (CAS: 26570-48-9, 200 is the number average molecular weight of the polyethylene glycol used), neopentyl glycol diacrylate (CAS: 2223-82-7), propoxylated neopentyl glycol diacrylate (CAS: 84170-74-1), trimethylolpropane triacrylate (CAS: 15625-89-5), propoxylated trimethylolpropane triacrylate (CAS: 53879-54-2), tripropylene glycol triacrylate (CAS: 145611-68-35) or pentaerythritol monoacrylate (CAS: 145611-80).
According to some preferred embodiments of the invention, the UV monomers include isooctyl acrylate and pentaerythritol trialkenate.
According to some preferred embodiments of the invention, the weight ratio of isooctyl acrylate to pentaerythritol triallyl ester in the UV monomer is 2-4:1.
According to some embodiments of the invention, the UV monomer accounts for 5-10% of the weight of the skin feel top-coat; it is understood that the specific mass percentages may be 6%, 7%, 8% and 9%.
According to some embodiments of the invention, the photoinitiator comprises at least one of a small molecule initiator and a high molecule initiator;
the small molecule initiator comprises at least one of an iron atom, a sulfonate and an ammonium radical.
According to some embodiments of the invention, when iron is included in the small molecule initiator, the photoinitiator includes at least one of fluorinated diphenyl ferrocene (IR-GACURE 784 CIBA-co.) and bis (non-fluorinated phenyl) ferrocene.
According to some embodiments of the invention, when at least one of sulfonate and ammonium is included in the small molecule initiator, the photoinitiator includes at least one of ammonium modified benzophenone, ammonium modified thioxanthone, ammonium modified benzil, sulfonate modified benzophenone, sulfonate modified thioxanthone, and sulfonate modified benzil.
According to some embodiments of the invention, the monomer of the high molecular initiator comprises at least one of an acrylic group, a vinyl group and an allyl group.
According to some embodiments of the invention, the polymeric initiator comprises a polymer incorporating a conventional photoinitiator.
According to some embodiments of the invention, the conventional photoinitiator includes at least one of benzophenone (CAS: 119-61-9), isopropylthioxanthone (CAS: 5495-84-1), and acylphosphorus oxide (CAS: 162881-26-7).
According to some embodiments of the invention, the photoinitiator comprises between 5 and 10% by mass of the skin-feel top-coat; it is understood that the specific mass percentages may be 6%, 7%, 8% and 9%.
According to some embodiments of the invention, the defoamer is at least one of Dowsen A-1920, A-2920, or TEGO AIREX 920.
According to some embodiments of the invention, the leveling agent is at least one of TEGO410, 450, 2200N, or DC 57.
According to some embodiments of the invention, the auxiliary agent accounts for 2-6% of the weight of the skin feel finishing paint; it is understood that the specific mass fraction may be 3%, 4% and 5%.
According to some embodiments of the invention, the filler powder comprises a pigment
According to some embodiments of the invention, the pigment is an extender pigment.
Preferably, the extender pigment comprises titanium dioxide and precipitated barium sulfate.
According to some embodiments of the invention, the filler powder comprises between 15 and 25% by mass of the skin feel top coat; it is understood that the specific mass fraction may be 18%, 20% and 23%.
According to some embodiments of the invention, the raw materials for preparing the skin feel finish further comprise a solvent.
According to some embodiments of the invention, the solvent comprises at least one of propylene glycol monomethyl ether (CAS: 107-98-2), ethylene glycol mono-n-butyl ether (CAS: 111-76-2), 1-octanol (CAS: 111-87-5), 2-octanol (CAS: 123-96-6), 2-ethyl-1-hexanol (CAS: 104-76-7), ethylene glycol mono (2-ethylhexyl) ether (CAS: 1559-35-9), propylene glycol mono-n-butyl ether (CAS: 57499-93-1), and dipropylene glycol mono-n-butyl ether (CAS: 29911-28-2).
According to some embodiments of the invention, the solvent comprises between 0.1 and 5% by mass of the skin feel top coat, it being further understood that the specific mass percentage is between 2 and 5%.
According to some embodiments of the invention, the sum of the mass percentages of the preparation raw materials of the skin feel finishing paint is 100%.
According to some preferred embodiments of the present invention, the raw materials for preparing the skin feel top coat comprise, in mass percent:
according to some embodiments of the invention, the skin-feel coating composition further comprises a skin-feel primer for use with the skin-feel topcoat.
According to some embodiments of the invention, the skin feel primer is prepared from the following raw materials in parts by weight:
According to some embodiments of the invention, the skin feel primer has a viscosity of 10-11s as measured using a paint-4 viscometer.
According to some embodiments of the invention, the primer UV resin comprises at least one of a polyester acrylic resin, an epoxy acrylic resin, a urethane acrylic resin, and a pure acrylic resin.
According to some embodiments of the invention, the primer UV resin is selected from epoxy acrylic resins;
preferably, the epoxy acrylic resin has a viscosity of 800 to 1300mPas (25 ℃).
The epoxy acrylic acid has the technical effects of low viscosity and quick drying, so that the epoxy acrylic acid can be suitable for spraying the skin-feel primer.
According to some embodiments of the invention, the primer UV resin comprises between 50-70% by mass of the skin feel primer; it is understood that the specific mass percentages may be 55%, 60%, 65% and 68%.
According to some embodiments of the invention, the primer UV monomer includes at least one of ethylene glycol diacrylate (CAS: 13048-33-4) and tripropylene glycol diacrylate (CAS: 42978-66-5).
According to some embodiments of the invention, the primer UV units are ethylene glycol diacrylate and tripropylene glycol diacrylate according to 1-5: 1 mass ratio.
According to some embodiments of the invention, the primer UV monomer comprises between 5-10% by mass of the skin feel primer; it is understood that the specific mass percentages may be 6%, 7%, 8% and 9%.
According to some embodiments of the invention, the primer photoinitiator may have a reagent selection range that is the same as or different from the reagent selection range of the photoinitiator.
According to some embodiments of the invention, the primer photoinitiator comprises between 5 and 10% by mass of the skin feel primer; it is understood that the specific mass percentages may be 6%, 7%, 8% and 9%.
According to some embodiments of the invention, the primer filler powder comprises a pigment.
According to some embodiments of the invention, the pigment comprises at least one of a coloring pigment, an extender pigment, and a lustrous pigment.
According to some embodiments of the invention, the colored pigment comprises titanium dioxide.
According to some embodiments of the invention, the extender pigment comprises at least one of barium sulfate, barium carbonate, calcium carbonate, talc, silica, and alumina white; preferably, the extender pigment comprises talc, whereby the resulting skin feel primer gives better chipping resistance to form a coating.
According to some embodiments of the invention, the lustrous pigment comprises at least one of aluminum, copper, zinc, nickel, aluminum oxide, mica, titanium oxide coated mica, iron oxide coated mica, titanium oxide coated aluminum oxide, and iron oxide coated aluminum oxide;
Wherein, aluminum comprises aluminum vapor deposition; copper includes brass;
According to some preferred embodiments of the present invention, the lustrous pigment comprises at least one of aluminum, mica, titanium oxide coated mica, iron oxide coated mica, titanium oxide coated alumina and iron oxide coated alumina;
Further preferably, the lustrous pigment comprises aluminum; thus, the glitter pigment may impart a more sparkling glitter or light interference pattern to the skin feel primer.
According to some embodiments of the invention, the particle structure of the lustrous pigment is flakes.
According to some embodiments of the invention, the long side dimension of the scale is 1-100 μm.
According to some preferred embodiments of the invention, the length dimension of the scale is 5-40 μm.
According to some embodiments of the invention, the scale has a thickness of 0.001-5 μm.
According to some preferred embodiments of the invention, the thickness of the scale is 0.01-2 μm.
It will be appreciated that the primer filler powder for the skin feel primer may also be used as the filler powder for the skin feel topcoat; the two may be the same or different.
According to some embodiments of the invention, the primer filler powder comprises between 15 and 25% by mass of the skin feel primer; it is understood that the specific mass fraction may be 18%, 20% and 23%.
According to some embodiments of the invention, the primer aid includes at least one of a thickener, a light stabilizer, a primer defoamer, a plasticizer, a surface conditioner, and an anti-settling agent. Wherein the thickener and anti-settling agent are effective to avoid settling of the primer filler powder; therefore, the consumption of the priming paint filling powder can be increased, and finally the skin feel of the coating prepared by the skin feel priming paint is improved.
According to some embodiments of the invention, the primer auxiliary accounts for 2-6% of the skin feel primer by mass; it is understood that the specific mass fraction may be 3%, 4% and 5%.
According to some embodiments of the invention, the thickener comprises at least one of an inorganic thickener, a polyacrylic thickener, an associative thickener, a cellulose derivative thickener, a protein thickener, an alginic thickener, a polyvinyl thickener, a polyether thickener, a maleic anhydride copolymer thickener, and a polyamide thickener.
According to some embodiments of the invention, the inorganic thickener comprises at least one of silicate, metal silicate, colloidal alumina, and natural minerals (e.g., montmorillonite).
According to some embodiments of the invention, the polyacrylic acid thickener comprises a copolymer of (meth) acrylic acid and (meth) acrylate, sodium polyacrylate.
According to some embodiments of the invention, the cellulose derivative-based thickener comprises at least one of carboxymethyl cellulose, methyl cellulose, and hydroxyethyl cellulose.
According to some embodiments of the invention, the proteinaceous thickener comprises at least one of casein, sodium caseinate, and ammonium caseinate.
According to some embodiments of the invention, the alginic acid thickener includes sodium alginate.
According to some embodiments of the invention, the polyvinyl thickener comprises at least one of polyvinyl alcohol, polyvinylpyrrolidone, and polyvinyl benzyl ether copolymer.
According to some embodiments of the invention, the polyether thickener comprises at least one of a polyether dialkyl ester, a polyether dialkyl ether, and a polyether epoxy modifier.
According to some embodiments of the invention, the maleic anhydride copolymer-based thickener comprises a partial ester of a vinyl methyl ether-maleic anhydride copolymer.
According to some embodiments of the invention, the polyamide-based thickener comprises a polyamide amine salt.
According to some preferred embodiments of the invention, the thickener comprises at least one of a polyacrylic thickener and an associative thickener.
According to some embodiments of the invention, the raw materials for preparing the skin feel primer further comprise a solvent; preferably, the solvent in the skin-feel primer is the same as the selection range of the solvent in the skin-feel finishing paint; the two may be the same or different.
According to some embodiments of the invention, the solvent comprises between 0.1 and 5% by mass of the skin feel primer, it being further understood that the specific mass percentage is between 2 and 5%.
According to some embodiments of the invention, the sum of the mass percentages of the preparation raw materials of the skin feel primer is 100%.
According to a second aspect of the present invention, there is provided a skin feel coating, the skin feel coating being prepared from the raw materials comprising the skin feel coating combination.
The skin-feel coating adopts all the technical schemes of the skin-feel coating combination of the embodiment, so that the skin-feel coating has at least all the beneficial effects brought by the technical schemes of the embodiment.
According to some embodiments of the invention, the skin feel coating comprises a primer coating and a top coat coating that are sequentially superimposed;
The preparation raw materials of the primer coating comprise the skin-feel primer;
The preparation raw materials of the finish paint coating comprise the skin feel finish paint.
Therefore, the interaction of the primer coating and the top-coat coating improves the adhesion capability between the skin-feel coating and the substrate, and improves the fullness, the temperature resistance (cold/hot) and the moisture resistance of the obtained skin-feel coating.
According to a third aspect of the present invention, there is provided a method for preparing the skin-feel coating, comprising spraying the skin-feel finish, and then sequentially performing half-curing and UV full-curing;
the semi-curing method comprises at least one of excimer lamp semi-curing and mercury lamp semi-curing.
(1) In the traditional process, the coating mode of the super-matte skin-feel coating is mainly roller coating, and the specific process route is roller coating of UV adhesion primer, primary UV lamp drying and curing, polishing, roller coating of skin-feel finishing paint, nitrogen filling and oxygen insulation, semi-curing of an excimer lamp and curing of a UV lamp; the method can only produce a large planar plate, has great limitation on the applicable product modeling, and has complicated working procedures, long equipment transformation period and high cost. In addition, in the traditional process, in order to avoid the influence of impurities in the air on the performance of the skin-feel coating, nitrogen filling and oxygen insulation are needed, so that the production cost is increased.
The invention adopts the half-curing and UV full-curing process, and the special selection of the half-curing process can prepare the skin-feel coating with excellent comprehensive performance on the premise of avoiding nitrogen protection.
The traditional roller coating method can only be used for preparing flat products, and the problems of poor adhesive force, thicker paint film, difficult drying and uncontrollable paint film surface quality are easily caused when the UV paint is sprayed. The invention can realize the preparation of the skin-feel coating by adopting a spraying method through matching with a reasonable skin-feel coating combination, has higher efficiency compared with the traditional roller coating, and is more beneficial to realizing the spraying of a matrix with a special shape.
Most importantly, the preparation process of the skin feel coating provided by the invention is simple in overall process and convenient to implement.
According to some embodiments of the invention, the method further comprises, prior to spraying the skin-feel finish, sequentially performing substrate selection, substrate treatment, spraying of the skin-feel primer, curing of the skin-feel primer to form a primer coating, and sanding of the primer coating.
According to some embodiments of the invention, the substrate is at least one of a wood substrate and a plastic substrate.
The purpose of the substrate treatment is to clean the substrate from impurities affecting the adhesion of the resulting skin feel coating.
According to some embodiments of the invention, the skin feel primer is sprayed on the treated substrate surface.
According to some embodiments of the invention, the skin feel primer is sprayed in an amount of 90-100 g/square meter.
According to some embodiments of the invention, the skin feel primer cures at an energy of 500-600mJ/cm 2,UVV1600-1800mJ/cm2.
The polishing of the primer coating can improve the adhesive force between the primer coating and the finish coating to a certain extent.
According to some embodiments of the invention, the skin feel top coat is sprayed onto the ground primer coat surface.
According to some embodiments of the invention, the spray level of the skin feel finish is 70-100g/m 2.
According to some preferred embodiments of the invention, the spray level of the skin feel finish is 80-90g/m 2.
It is further understood that the specific spray level of the skin feel finish may be 71 g/square meter, 72 g/square meter, 73 g/square meter, 74 g/square meter, 75 g/square meter, 76 g/square meter, 77 g/square meter, 78 g/square meter, 79 g/square meter, 82 g/square meter, 85 g/square meter, 87 g/square meter, 90 g/square meter, 93 g/square meter, 95 g/square meter and 98 g/square meter.
If no special description exists, the spraying air pressure is 0.4-0.6MPa in the spraying of the skin-feel primer and the skin-feel finish paint.
If not specified, the spray nozzles are spaced from the substrate by about 20cm in the application of the skin-feel primer and the skin-feel topcoat.
If no special description exists, the zigzag spraying method is adopted in the spraying of the skin-feel primer and the skin-feel finish paint, and the linear speed of the spraying is about 3.00m/min.
If not specified, the spray coating of the skin feel primer and the skin feel topcoat results in an angle of about 45 ° between the nozzle and the substrate.
Therefore, through adjustment of the included angle, the spraying speed, the spraying air pressure and the like, a coating with thinner thickness and higher flatness can be obtained, and the defect of surface quality caused by traditional roll coating is effectively avoided; and the special-shaped surface can be sprayed at the same time, and the shape of the base material is not limited.
The coating amounts of the skin-feel primer and the skin-feel topcoat have an influence on the fullness and the hiding power of the resulting skin-feel coating, and within the above-mentioned coating amounts, a skin-feel coating having good hiding power as well as high fullness can be obtained. If the coating amount is below the above lower limit, some degree of fullness may be lost.
According to some embodiments of the invention, when the method of semi-curing comprises semi-curing the excimer lamp, the energy of the excimer lamp used is UVD 100-250mJ/cm 2.
According to some preferred embodiments of the invention, when the method of semi-curing comprises semi-curing the excimer lamp, the energy of the excimer lamp used is UVD 100-200mJ/cm 2.
According to some embodiments of the invention, when the method of semi-curing comprises semi-curing the excimer lamp, the wavelength of the excimer lamp used is about 172nm.
According to some embodiments of the invention, when the method of semi-curing comprises semi-curing the excimer lamp, the linear velocity of the semi-curing is 3-6m/min.
According to some embodiments of the invention, when the method of semi-curing comprises semi-curing the mercury lamp, the energy of the mercury lamp used is UVA 90-200mJ/cm 2,UVV 90-200mJ/cm2.
According to some embodiments of the invention, when the method of semi-curing comprises semi-curing the mercury lamp, the energy of the mercury lamp used is UVA 100-200mJ/cm 2,UVV 100-200mJ/cm2.
The mercury lamp is not a single-color lamp, the peak position wavelength is 254nm, 365nm and the like, and the peak position can be adjusted by a color filter.
According to some embodiments of the invention, when the semi-curing method comprises semi-curing the mercury lamp, the linear velocity of the semi-curing is about 5m/min.
According to some embodiments of the invention, the UV full cure energy is UVA 450-600mJ/cm 2,UVV1500-1800mJ/cm2.
According to some preferred embodiments of the invention, the UV full cure energy is in the range of UVA 500-600mJ/cm 2,UVV1600-1800mJ/cm2.
According to some preferred embodiments of the invention, the light source used for the UV full curing is at least one of a mercury lamp and a gallium lamp.
According to some preferred embodiments of the invention, the linear velocity of the UV full curing is about 5m/min (referring to the linear velocity of the UV curing machine used).
By controlling the movement linear speed (the aforementioned curing linear speed) of the curing instrument in the half-curing and UV full-curing processes, the curing uniformity of the skin-feel coating can be improved, and the surface performance of the obtained skin-feel coating can be finally improved.
The curing energy of each step is related to the drying speed of the skin-sensitive coating, the brittleness and the adhesive force of the skin-sensitive coating; if the curing energy is higher than the upper limit of the above energy, the paint film may become brittle, crack, and sacrifice adhesion to some extent.
According to a third aspect of the present invention, there is provided a use of the coating in the preparation of furniture, appliances and vehicles.
The application adopts all the technical schemes of the skin feel coating of the embodiment, so that the skin feel coating has at least all the beneficial effects brought by the technical schemes of the embodiment.
Unless otherwise specified, "about" in the present invention means that the allowable error is within ±2%, for example, about 100 actually means that 100±100×2% =98 to 102.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
Example 1
The skin-feel coating is prepared in the embodiment, the adopted skin-feel coating composition is shown in table 1, and the specific flow is as follows:
S1, cleaning a base material; wiping the surface of the melamine board by using white cloth dipped with a UV diluent (ZUX 2014), and removing the light sand of the sponge sand which still exists with stains;
s2, spraying a skin feel primer: spraying the skin-feel primer in table 1 onto the surface of the substrate obtained in the step S1 by adopting a spraying method;
94 g/square meter of coating weight; the spraying air pressure is 0.5MPa; the nozzle is about 20cm from the substrate; setting the speed of the reciprocating machine to 3.00m/min;
s3, curing the skin-feel primer: UV curing is adopted, and the curing energy is UVA 600mJ/cm 2;UVV 1700mJ/cm2; preparing a skin-feel primer to obtain a primer coating; z-shaped solidification is carried out, and the linear speed is 5m/min.
S4, polishing the primer coating obtained in the step S3; sanding the surface coating of the component obtained in the step S3 by using a sanding machine provided with 400# abrasive belt and 600# abrasive belt;
S5, spraying skin feel finishing paint:
Spraying the skin-feel finishing paint shown in the table 1 on the surface of the primer coating obtained in the step S4 by adopting a spraying method; the spraying amount is 90g/m 2;
S6, semi-curing skin feel finishing paint: an excimer lamp with the wavelength of about 172nm is adopted, and the specific energy is UVD 180mJ/cm 2; z-shaped solidification is carried out, and the linear speed is 5m/min.
S7, fully curing skin feel finishing paint: UV curing is adopted, and the curing energy is UVA 500mJ/cm 2,UVV 1700mJ/cm2; z-shaped solidification is carried out, and the linear speed is 5m/min; the curing light source is a mercury lamp and a gallium lamp, and the energy peak corresponding wavelength is in the range of 365nm, 395nm, 405nm and the like.
TABLE 1 composition of skin feel coating combinations used in example 1
In Table 1, the UV resin was a mixture of urethane acrylic resin (Tianjin sea factor Co., ltd.) of type UV resin 5351 and bisphenol A epoxy acrylate resin (purchased from Dongtou Heng Li printing Material Co., ltd.) of type HL-100 in a mass ratio of 19:46;
The UV monomers are: the preparation method comprises the following steps of mixing isooctyl acrylate and pentaerythritol trialkenyl ester according to a mass ratio of 3:1;
the photoinitiator is as follows: fluorinated diphenyl ferrocene available from IR-GACURE784 CIBA-company;
the auxiliary agent is as follows: the defoaming agent and the leveling agent are mixed according to the weight ratio of 1:1; the defoamer is Dowsen A-1920, and the leveling agent is the leveling agent TEGO410.
The filling powder comprises the following components: the titanium dioxide and the precipitated barium sulfate are mixed according to the weight ratio of 8:5.
The solvent is as follows: propylene glycol monomethyl ether and dipropylene glycol mono-n-butyl ether are mixed according to the mass ratio of 5:1.
The primer UV resin is epoxy acrylic resin with the model L-6111 purchased from blue Ke Lu;
The primer UV monomer is as follows: the ethylene glycol diacrylate and the tripropylene glycol diacrylate are mixed according to a mass ratio of 1:1.
The primer photoinitiator is as follows: fluorinated diphenyl ferrocene available from IR-GACURE784 CIBA-company;
The primer auxiliary agent is as follows: thickener, light stabilizer, primer defoamer, plasticizer, surface conditioner and anti-settling agent in a ratio of 1:1:1: mixing the materials according to the mass ratio of 1:1:1; wherein the thickener is selected from carboxymethyl cellulose, the light stabilizer is Chiguard HP-1011 (from Basf), the primer defoamer is Dowsen A-1920, the plasticizer is dioctyl phthalate, and the surface regulator is purchased from the company of Parter chemical engineering, suzhou, and the model is surface regulator W-4040; the anti-settling agent is purchased from chemical industry (Beijing) limited company of Shengchuan, australia and has the model number of SC-880.
The priming paint filling powder comprises the following components: a mixture of titanium dioxide, talcum powder and aluminum powder according to the weight ratio of 8:5:4; wherein the aluminum powder is in a scale shape, the sheet diameter is 20-40 mu m, and the thickness is 0.1-1 mu m.
The primer solvent is as follows: propylene glycol monomethyl ether and dipropylene glycol mono-n-butyl ether are mixed according to the mass ratio of 5:1.
Example 2
This example produced a skin feel coating, which differs from example 1 in particular in that:
(1) The parts of the UV resin and the UV monomer in the skin-feel finish are 63 parts and 8 parts respectively, and the viscosity of the obtained skin-feel finish is adjusted to 10-11 s (25 ℃ C., a-4 viscometer) by adjusting the proportion of the solvent.
Example 3
This example produced a skin feel coating, which differs from example 1 in particular in that:
(1) The primer filling powder in the skin feel primer is lifted to 20 parts.
Example 4
This example produced a skin feel coating, which differs from example 1 in particular in that:
in the step S6, the semi-curing method adopts a mercury lamp semi-curing method, and the curing energy is UVA 180mJ/cm 2,UVV 160mJ/cm2.
Comparative example 1
This comparative example produced a skin feel coating, which differs from example 1 in particular in that:
(1) The coating amount of the skin feel finish in the step S5 is 65g/m 2.
Comparative example 2
This comparative example produced a skin feel coating, which differs from example 3 in particular in that:
(1) In step S5, the viscosity of the applied skin feel topcoat was 8S (diluted with the addition of a diluent).
Comparative example 3
The skin feel coating is prepared by adopting a conventional method in the comparative example, and comprises the following specific steps:
D1. Roller coating UV-attached primer (all the attached primers commonly used in the market can be used without obvious difference): coating weight: 15g/m 2;
D2. roll-coating UV transparent primer (same composition as the skin feel primer in example 1): coating weight: 30g/m 2;
D3. And (3) primer sanding: the number of abrasive belt is 320-400-600, the surface is smooth after sanding, and no bright spots and sand penetrating bottom are generated;
D4. Roller coating UV skin feel finishing paint: coating weight: 35g/m 2;
D5. Skin feel pre-curing, wherein the process is carried out in an environment of isolating oxygen, the oxygen content is less than 100ppm (0.01 percent, one ten thousandth), the power of a pre-curing LED lamp is set to be 30 percent, and the power of an excimer lamp is set to be 25 percent;
D6. full dry curing: one gallium lamp and two mercury lamps are fully on, and the energy UVA is 700mJ/cm 2,UVV500mJ/cm2.
Comparative example 4
The skin feel coating was prepared in this comparative example, which is different from example 1 in the composition ratio of the skin feel primer and the skin feel topcoat used, and the composition of the skin feel primer and the skin feel topcoat used in this comparative example is shown in Table 2, and in this comparative example, the sources of the preparation raw materials are the same as those in Table 1.
Table 2 composition of UVV primer and skin feel topcoat used in comparative example 4
Test case
This test example tests the properties of the skin feel coatings obtained in examples 1 to 4 and comparative examples 1 to 3, and the specific test method includes:
the reference standard of the adhesive force test is GB/T4893.4-2013;
the reference standard of the dry heat resistance test is GB/T4893.3-2020;
the reference standard of the damp-heat resistance test is GB/T4893.2-2020;
The reference standard of the cold and hot cycle test is GB/T4893.7-2013;
The reference standard of the glossiness test is GB/T4893.6-2013;
the reference standard of the hardness test is GB/T4893.5-2013;
the reference standard of the yellowing resistance test is GB/T23983-2009;
The test results are shown in Table 3.
TABLE 3 Properties of the skin feel coatings obtained in examples 1 to 4 and comparative examples 1 to 4
From the results shown in Table 2, it can be seen that: the skin-feel coating obtained by the skin-feel coating composition provided by the invention can realize the skin-feel effect of the surface of the special-shaped/molded plate in advance without obvious difference in physical properties, nitrogen charging and oxygen discharging are not needed in the UV curing process, the production cost is greatly reduced, and a paint film with a ductile elasticity (increasing the paint coating amount of the paint) or a smooth elasticity (improving the power of an excimer lamp in the pre-curing stage) can be obtained by adjusting the paint coating amount of the paint and the pre-curing energy.
However, if the amount of the spray coating is too low, the resulting skin feel coating is not thick enough, and thus the feel is smooth but the feeling of flesh is lost and the elasticity is lost.
If the viscosity of the skin-feel coating composition is too low, the hardness of the resulting skin-feel coating is significantly reduced and the hand feel is also affected.
In comparative example 4, the duty ratio of the skin-feel finishing paint resin is reduced, and although the obtained skin-feel finishing paint can still be used for spraying, the surface of a paint film after spraying has obvious uneven phenomenon such as oil accumulation and the like due to slower curing and drying speeds, the hardness is lower, and the actual industrial requirements are not met, so that no specific test is performed.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.

Claims (6)

1. The skin-feel coating is characterized in that the skin-feel coating is prepared from the following raw materials in a skin-feel coating combination; the skin feel coating comprises a primer coating and a top coat coating which are sequentially overlapped;
the skin feel coating combination comprises a skin feel primer and a skin feel finish;
the preparation raw materials of the skin feel finishing paint comprise the following components in parts by weight:
50-70 parts of UV resin;
5-10 parts of UV monomer;
5-10 parts of a photoinitiator;
2-6 parts of an auxiliary agent;
15-25 parts of filling powder;
The UV resin is bisphenol A epoxy acrylate resin and polyurethane acrylic resin;
The filling powder comprises titanium dioxide and precipitated barium sulfate;
The auxiliary agent comprises a leveling agent and a defoaming agent,
The viscosity of the skin feel finishing paint is 10 s-11 s;
The preparation method of the skin-feel coating comprises the steps of selecting a substrate, treating the substrate, spraying the skin-feel primer, curing the skin-feel primer to form a primer coating, polishing the primer coating, spraying the skin-feel finishing paint, and performing half-curing and UV full-curing on the skin-feel finishing paint;
the spraying amount of the skin-feel finishing paint is 70-100 g/m 2;
The semi-curing method is mercury lamp semi-curing.
2. The skin feel coating of claim 1, wherein the UV monomer comprises at least one of an acryl or methacryl terminated vinyl polymer, styrene, N-vinyl pyrrolidone, isooctyl acrylate, hydroxyethyl acrylate, isobornyl acrylate, triethylene glycol diacrylate, tripropylene glycol diacrylate, ethylene glycol diacrylate, polyethylene glycol 200 diacrylate, neopentyl glycol diacrylate, propoxylated neopentyl glycol diacrylate, trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate, or pentaerythritol propoxylate.
3. The skin feel coating of claim 1, wherein the photoinitiator comprises at least one of a small molecule initiator and a high molecule initiator;
the small molecule initiator comprises at least one of an iron atom, a sulfonate and an ammonium radical.
4. A skin feel coating according to any one of claims 1 to 3, wherein the skin feel primer is prepared from the following raw materials in parts by weight:
50-70 parts of primer UV resin;
5-10 parts of primer UV monomer;
5-10 parts of a primer photoinitiator;
2-6 parts of primer auxiliary agent;
15-25 parts of primer filling powder.
5. The skin feel coating according to claim 1, wherein the energy of the mercury lamp used in the semi-curing is UVA 90-200mJ/cm, UVV 90-200 mJ/cm.
6. Use of the skin feel coating of any one of claims 1-5 in the preparation of furniture, household appliances and vehicles.
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