CN115160905A - Metal base band black precoating coating and preparation method thereof - Google Patents
Metal base band black precoating coating and preparation method thereof Download PDFInfo
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- CN115160905A CN115160905A CN202210898295.3A CN202210898295A CN115160905A CN 115160905 A CN115160905 A CN 115160905A CN 202210898295 A CN202210898295 A CN 202210898295A CN 115160905 A CN115160905 A CN 115160905A
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- 239000003054 catalyst Substances 0.000 claims description 4
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Images
Classifications
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
Abstract
The invention discloses a high-gloss high-weather-resistance black precoating paint for a metal base band, which comprises the following components in percentage by mass: 45-55% of high polymer, 4-8% of carbon black, 5-10% of cross-linking agent, 0.3-1% of flatting agent, 0.3-1% of defoaming agent, 3-10% of wetting dispersant, 0.3-1% of enclosed acid catalyst, 1-2% of light stabilizer and 30-40% of mixed solvent. The coating formed by curing the high-gloss high-weather-resistance metal-based black precoat coating disclosed by the invention has the advantages of ultraviolet aging resistance, chalking resistance, stain resistance and paint film durability which are far higher than those of common coil steel coatings, and has more excellent weather resistance.
Description
Technical Field
The invention relates to the technical field of automobile decorative coatings, in particular to a black precoating coating of a high-gloss high-weather-resistance metal base band and a preparation method thereof.
Background
The precoating technology of the metal base band is produced and developed in China for some years, the precoating metal base band is widely applied due to environmental protection, easy processing and excellent mechanical property, the demand of precoating metal base band paint is more and more large, at present, a polyester, acrylic acid and epoxy system is the variety with the largest use amount in the precoating metal base band paint and has been widely applied in the high-end building field, but the precoating metal base band is not applied to the automobile decoration field at present, along with the development of buildings and new energy technology in recent years, the requirements on the precoating metal base band product are more and more high, the product is lightened day by day, the maintenance of the appearance is dealt with the high weather resistance, the high deep punching resistance is realized to ensure the stability of the post-processing property, in the field of new energy automobiles, the lightening is pursued, the integral energy consumption is saved, in addition, the high-luster black appearance is more and more accepted by the public, and in view of the demands, the paint product with the high weather resistance, the high gloss black and the high processing property on the stainless steel base material is developed.
The preparation method of the coating material in the prior art has the following defects:
1. the main performance of a paint film is determined by a film forming substance in the paint components, the main resin used by the existing precoated metal base band paint mainly comprises about 60% of saturated polyester resin, about 30% of PVC plastisol, about 5% of PVDF (polyvinylidene fluoride) resin, the rest 5% of acrylic resin, organosilicon modified saturated polyester, epoxy resin and the like, the polyester resin is the most widely applied resin variety in the precoated metal base band paint, the precoated metal base band paint finish paint on the market is mostly composed of polyester resin, amino resin, isocyanate resin added solvent, pigment filler and auxiliary agent, the hardness is high, the gloss and color retention are good, but the deep processing resistance, the gloss and the weather resistance can reach the high standard at the same time, and no black paint product exists at present.
Disclosure of Invention
The invention aims to provide a black precoating paint of a high-gloss high-weather-resistance metal base band, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a black precoat coating of a high-gloss high-weather-resistance metal base band comprises the following components in percentage by mass: 45-55% of high polymer, 4-8% of carbon black, 5-10% of cross-linking agent, 0.3-1% of flatting agent, 0.3-1% of defoaming agent, 3-10% of wetting dispersant, 0.3-1% of enclosed acid catalyst, 1-2% of light stabilizer and 30-40% of mixed solvent.
Preferably, the high polymer is epoxy modified polyester high polymer, acrylic acid modified polyester high polymer or saturated polyester high polymer, the number average molecular weight range is 4000-30000, the hydroxyl value is 30-100mgKOH/g, and the acid value is not more than 30mgKOH/g.
Preferably, the pigment is carbon black, which is chemically an amorphous carbon having a particle size of 7-40 nm.
Preferably, the crosslinking agent is an amino resin. Wherein the amino resin is at least one of methylated melamine resin, butylated urea formaldehyde resin, butylated melamine resin and mixed etherified melamine resin.
Preferably, the leveling agent is a polyacrylate leveling agent.
Preferably, the defoaming agent is a non-silicon defoaming agent.
Preferably, the dispersant is a high efficiency polymer with a molecular weight of 1000-10000.
Preferably, the catalyst is one or more of dinonyl naphthalene disulfonic acid, dinonyl naphthalene sulfonic acid, dodecylbenzene sulfonic acid and p-toluenesulfonic acid.
Preferably, the light stabilizer is one or a mixture of more of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and hindered amines.
Preferably, the solvent is one or a mixture of more of cyclohexanone CYC, mixed dibasic ester DBE, S-150 aromatic hydrocarbon solvent, n-butyl alcohol, ethylene glycol butyl ether and propylene glycol monomethyl ether acetate PMA.
Preferably, the black precoating paint of the high-gloss high-weather-resistance metal base band is directly coated on the stainless steel base band and is baked and cured at high temperature for forming.
Compared with the prior art, the invention has the following beneficial effects:
1. the coating formed by curing the high-gloss high-weather-resistance metal base band black precoat coating is far higher in ultraviolet aging resistance, chalking resistance, stain resistance and paint film durability than common coil steel coatings, and has more excellent weather resistance;
2. the interlayer adhesive force between the coating formed by curing the high-gloss high-weather-resistance metal base band black precoat coating and the base material is strong, and the high-gloss high-weather-resistance metal base band black precoat coating has excellent processing and forming performances, excellent butanone wiping resistance, excellent wear resistance and durability in use;
3. the blackness and the gloss of the coating formed by curing the high-gloss high-weather-resistance metal base band black precoat coating cannot be achieved by the existing coil coating;
4. the black precoating paint of the high-gloss and high-weather-resistance metal base band combines the traditional primer and the traditional finish into a whole, has simpler and more convenient construction process and saves energy.
Drawings
FIG. 1 is a flow chart of the preparation of the present invention;
FIG. 2 is a schematic representation of a first dosage of the present invention;
FIG. 3 is a schematic diagram illustrating a first effect of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of the present invention;
FIG. 5 is a diagram illustrating a second effect of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, in an embodiment of the present invention, a high gloss high weather resistant metal-based black precoat coating comprises, by mass: 45-55% of high polymer, 4-8% of carbon black, 5-10% of cross-linking agent, 0.3-1% of leveling agent, 0.3-1% of defoaming agent, 3-10% of wetting dispersant, 0.3-1% of enclosed acid catalyst, 1-2% of light stabilizer and 30-40% of mixed solvent, wherein the high polymer is epoxy modified polyester high polymer, acrylic modified polyester high polymer or saturated polyester high polymer, the mass range of the number average molecule is 4000-30000, the hydroxyl value is 30-100mgKOH/g, the acid value is not more than 30mgKOH/g, the pigment is carbon black, the chemical essence of the pigment is amorphous carbon with the particle size of 7-40nm, and the cross-linking agent is amino resin. Wherein, the amino resin is at least one of methylated melamine resin, butylated urea-formaldehyde resin, butylated melamine resin and mixed etherified melamine resin, the flatting agent is polyacrylate flatting agent, the defoaming agent is non-silicon defoaming agent, the dispersing agent is a high-efficiency polymer with the molecular weight of 1000-10000, the catalyst is one or a mixture of more of dinonyl naphthalene disulfonic acid, dinonyl naphthalene sulfonic acid, dodecyl benzene sulfonic acid and p-toluenesulfonic acid, the light stabilizer is one or a mixture of more of salicylic acid esters, benzophenones, benzotriazoles, substituted acrylonitrile, triazines and hindered amines, the solvent is one or a mixture of more of cyclohexanone CYC, mixed dibasic acid ester DBE, S-150 aromatic hydrocarbon solvent, n-butyl alcohol, ethylene glycol butyl ether and propylene glycol methyl ether acetate PMA, the black precoating paint of the high-gloss and high-weather-resistance metal base band is directly coated on a stainless steel base band and is cured and formed by high-temperature baking;
high polymer: the high polymer is present in an amount of not less than 45% by weight, preferably not less than 50% by weight, based on the weight of the high gloss weatherable metal based black precoat coating composition. And the high-gloss high-weather-resistance metal base belt black precoat coating composition is calculated by weight, the mass percentage of the high polymer is not higher than 60%, preferably not higher than 55%, the high polymer is epoxy modified polyester high polymer, acrylic modified polyester high polymer or saturated polyester high polymer, the number average molecular weight range of the high polymer is 4000-30000, the hydroxyl value is 40-90mgKOH/g, and the acid value is not more than 10mgKOH/g, the high polymer can be any commercially available epoxy modified polyester high polymer, acrylic modified polyester high polymer or saturated polyester high polymer meeting the description, such as but not limited to Toyobo, evonik, arkema, changjing, koida, SK, zhaxan newly produced epoxy or acrylic modified and unmodified saturated polyester resin, such as but not limited to SKYBON ES 710, SKYBON ES 750, SETAL 5VX-74, SEKY ETSS-80, SETALETSS 1611VX-74, ERD 5-50565-R-5060, etc.;
carbon black: the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the carbon black is not less than 3%. And the weight of the black precoating coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, the mass percentage content of the cross-linking agent is not higher than 8%, the pigment is carbon black, and the chemical essence of the pigment is amorphous carbon with the particle size of 7-40 nm. To ensure the blackness and color fullness of the coating, carbon BLACK having a particle size of 7 to 18nm is preferable, and the carbon BLACK may be any commercially available carbon BLACK satisfying the above description, such as, but not limited to, hibernate hibblack 970LB, hibernate 930L, hibernate 890, colorour BLACK FW 171, colorour BLACK FW 255, colorour BLACK FW 285, and the like;
a crosslinking agent: the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the cross-linking agent is not lower than 3%. And the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, the mass percentage content of the cross-linking agent is not higher than 10%, and the cross-linking agent is at least one of amino resin, methylated melamine resin, butylated urea formaldehyde resin, butylated melamine resin and mixed etherified melamine resin. To ensure the adhesion, curing speed and flexibility of the coating, methylated melamine resin is preferred, and the crosslinking agent may be any commercially available amino resin satisfying the above description, such as but not limited to CYMEL 303LF, CYMEL 325, ccp MR 603, ccp MR 625, and the like.
Leveling agent: the weight of the black precoating coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the leveling agent is not lower than 0.3%. And, the weight of the black precoating coating composition of high-gloss high-weatherability metal-based tape is taken as a calculation unit, the mass percentage content of the leveling agent is not higher than 1%, the leveling agent is polyacrylate leveling agent to ensure high fullness of the appearance of the coating, and the leveling agent can be any commercially available polyacrylate leveling agent satisfying the above description, such as, but not limited to, BYK 361N, BYK 358, EFKA FL 3740, EFKA FL 3741, and the like;
defoaming agent: the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the defoaming agent is not lower than 0.3%. And, by taking the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal baseband as a calculation unit, the mass percentage of the defoaming agent is not higher than 1%, the defoaming agent is a non-silicon defoaming agent to ensure high fullness of the appearance of the coating, and the defoaming agent can be any commercially available non-silicon defoaming agent meeting the description above, such as but not limited to BYK 1790, BYK 1791, BYK 051N, BYK 052N, tego 920 and the like;
wetting and dispersing agent: the weight of the black precoat coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the wetting dispersant is not less than 3%. And, the mass percentage content of the wetting dispersant is not higher than 10% by weight of the high gloss high weather resistant metal based black precoat coating composition, wherein the dispersant is a high efficiency polymer with a molecular weight of 1000-10000 to ensure the stability of the coating system and the blackness of the coating appearance, and the wetting dispersant can be any commercially available dispersant satisfying the above description, such as but not limited to BYK 163, BYK 2013, luobotubu Solsperse 76500, luobubu Solsperse 76400, luobubu Solsperse 32500, etc.;
blocked acid catalyst: the weight of the black precoating coating composition of the high-gloss high-weather-resistance metal base band is taken as a calculation unit, and the mass percentage content of the closed acid catalyst is not less than 0.3%. And, the mass percentage content of the blocked acid catalyst is not higher than 1% by weight of the black precoat coating composition of the high gloss and weather resistant metal-based strip, wherein the catalyst is one or more of dinonyl naphthalene disulfonic acid, dinonyl naphthalene sulfonic acid, dodecylbenzene sulfonic acid, and p-toluene sulfonic acid, and the blocked acid catalyst can be any commercially available acid catalyst satisfying the above description, such as but not limited to KING NACURE 5225, KING NACURE 2107, hearts AD3325, BD 7749, etc.;
light stabilizer: the weight of the high-gloss high-weather-resistance metal base band black precoat coating composition is taken as a calculation unit, and the mass percentage content of the light stabilizer is not less than 1%. And the mass percentage content of the light stabilizer is not higher than 2 percent by weight of the high-gloss high-weather-resistance metal base band black precoat coating composition, wherein the light stabilizer is one or a mixture of more than one of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and hindered amines, and the light stabilizer can be any commercially available light stabilizer meeting the description above, such as but not limited to Ciba Tinuvin 99, ciba Tinuvin 123, ciba Tinuvin 1130, ciba Tinuvin 5050 and the like;
mixing solvent: the solvent is one or a mixture of more of cyclohexanone CYC, mixed dibasic acid ester DBE, S-150 aromatic hydrocarbon solvent, n-butyl alcohol, ethylene glycol monobutyl ether and propylene glycol monomethyl ether acetate PMA, in the invention, the black precoat coating of the high-gloss high-weather-resistance metal base band is directly coated on a stainless steel substrate, and is baked and cured at high temperature for forming a coating on the stainless steel substrate, and the formed coating is tested, unless stated otherwise, in the following embodiments, the test is carried out according to the national standard GB/T13448-2019, and the result meets the requirements of the national standard GB/T13448-2019.
Referring to fig. 2 and 3, in an embodiment of the present invention, a black precoat coating of a high gloss and high weather resistance metal base strip includes: the black precoating coating of a high gloss high weather resistant metal baseband, it includes the component of the part by weight of figure 2, the mixed solvent is cyclohexanone CYC, S-150 aromatic hydrocarbon solvent, n-butanol, the mixture of three 9: adding a mixed solvent, a dispersing agent and carbon black into a proportioning cylinder, stirring and mixing uniformly at a rotation speed of 500-800 rpm, and sanding the mixed slurry until the fineness of the slurry is below 5 mu m; slowly adding the high polymer, the cross-linking agent, the flatting agent, the defoaming agent, the closed acid catalyst and the light stabilizer into the slurry under the stirring condition that the rotating speed of a dispersion machine is 800-1200 rpm, and fully and uniformly stirring; adjusting the viscosity degree to 60-120 seconds by using the rest mixed solvent, measuring by using a coating-4 cup, filtering and packaging to obtain the black precoating paint of the high-gloss high-weather-resistance metal base band, and coating to prepare the plate: and (3) coating the obtained black precoating paint of the high-gloss high-weather-resistance metal base band on a stainless steel plate by using a wire bar roller, baking the stainless steel plate in an oven at the temperature of 250 ℃ for 150s, and heating the metal plate at a temperature of PMT:230-240 ℃ to obtain a paint film with a film thickness of 14 μm, and FIG. 3 is a performance test table of the black precoat of the high-gloss high-weather-resistant metal base band obtained:
referring to fig. 4 and 5, in an embodiment of the present invention, a black precoat coating of a high gloss and weather resistant metal base strip includes: the high-gloss high-weather-resistance metal base band black precoat coating comprises the components in parts by weight as shown in figure 4, wherein a mixed solvent is a mixture of propylene glycol monomethyl ether acetate (PMA), an S-150 aromatic hydrocarbon solvent and n-butyl alcohol, and the ratio of the three solvents is 2: adding a mixed solvent, a dispersing agent and carbon black into a proportioning cylinder, stirring and uniformly mixing under the stirring condition of the rotating speed of 500-800 r/min, and sanding the mixed slurry until the fineness reaches below 5 mu m; slowly adding the high polymer, the cross-linking agent, the flatting agent, the defoaming agent, the closed acid catalyst and the light stabilizer into the slurry under the stirring condition that the rotating speed of a dispersion machine is 800-1200 r/m, and fully and uniformly stirring; adjusting the viscosity degree to 60-120 seconds by using the rest mixed solvent, measuring by using a coating-4 cup, filtering and packaging to obtain the black precoating paint of the high-gloss high-weather-resistance metal base band, and coating to prepare the plate: and (3) coating the obtained black precoating paint of the high-gloss high-weather-resistance metal base band on a stainless steel plate by using a wire bar roller, baking the stainless steel plate in an oven at the temperature of 250 ℃ for 150s, and heating the metal plate at a temperature of PMT:230-240 ℃ to obtain a paint film with the film thickness of 14 μm, and FIG. 5 is a performance test table of the black precoat of the high-gloss high-weather-resistance metal base band.
The working principle is as follows: adding a mixed solvent, a dispersing agent and carbon black into a reaction container, uniformly mixing under the stirring condition of the rotating speed of 500-800 r/min, sanding the slurry in the reaction container by using a horizontal sand mill until the fineness reaches below 5 mu m, and then slowly adding a high polymer, a cross-linking agent, a flatting agent, a defoaming agent, a closed acid catalyst and a light stabilizer into the slurry inside under the stirring condition of the rotating speed of a dispersing machine of 800-1200 r/min, and fully and uniformly stirring; and (3) adjusting the viscosity by using a solvent to obtain the black precoating coating of the high-gloss high-weather-resistance metal base band.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (11)
1. The black precoating coating of the high-gloss high-weather-resistance metal base band is characterized in that: the coating composition comprises the following components in percentage by mass: 45-55% of high polymer, 4-8% of carbon black, 5-10% of cross-linking agent, 0.3-1% of flatting agent, 0.3-1% of defoaming agent, 3-10% of wetting dispersant, 0.3-1% of enclosed acid catalyst, 1-2% of light stabilizer and 30-40% of mixed solvent.
2. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the high polymer is epoxy modified polyester high polymer, acrylic acid modified polyester high polymer or saturated polyester high polymer, the number average molecular weight range is 4000-30000, the hydroxyl value is 30-100mgKOH/g, and the acid value is not more than 30mgKOH/g.
3. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the pigment is carbon black, and the chemical essence of the pigment is amorphous carbon with the particle size of 7-40 nm.
4. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the cross-linking agent is amino resin. Wherein the amino resin is at least one of methylated melamine resin, butylated urea formaldehyde resin, butylated melamine resin and mixed etherified melamine resin.
5. The black precoat coating of a high gloss high weathering metal base strip according to claim 1, characterized in that: the flatting agent is polyacrylate flatting agent.
6. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the defoaming agent is a non-silicon defoaming agent.
7. The black precoat coating of a high gloss high weathering metal base strip according to claim 1, characterized in that: the dispersant is a high-efficiency polymer with the molecular weight of 1000-10000.
8. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the catalyst is one or a mixture of dinonyl naphthalene disulfonic acid, dinonyl naphthalene sulfonic acid, dodecyl benzene sulfonic acid and p-toluenesulfonic acid.
9. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the light stabilizer is one or a mixture of more of salicylates, benzophenones, benzotriazoles, substituted acrylonitrile, triazines and hindered amines.
10. The black precoat coating of a high gloss high weathering metal base band according to claim 1, characterized in that: the solvent is one or a mixture of cyclohexanone CYC, mixed dibasic ester DBE, S-150 aromatic hydrocarbon solvent, n-butyl alcohol, ethylene glycol monobutyl ether and propylene glycol monomethyl ether acetate PMA.
11. The method for preparing a black precoat coating of a high gloss high weathering metal based band according to any of claims 1 to 8, characterized in that: the black precoating paint of the high-gloss high-weather-resistance metal base band is directly coated on the stainless steel base band and is baked and cured at high temperature for forming.
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| CN116042062A (en) * | 2022-12-09 | 2023-05-02 | 中华制漆(新丰）有限公司 | Water-based low-temperature baking coating and application method thereof |
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Application publication date: 20221011 |