CN110484102B - Polyester oxidized pearl roller coating paint and preparation method and application thereof - Google Patents
Polyester oxidized pearl roller coating paint and preparation method and application thereof Download PDFInfo
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- CN110484102B CN110484102B CN201910741351.0A CN201910741351A CN110484102B CN 110484102 B CN110484102 B CN 110484102B CN 201910741351 A CN201910741351 A CN 201910741351A CN 110484102 B CN110484102 B CN 110484102B
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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
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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
- 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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
Abstract
The invention belongs to the technical field of coatings, and discloses a novel polyester oxidized pearl roller coating and a preparation method and application thereof. The polyester oxidized pearl roller coating paint comprises the following components: linear high molecular polyester resin A, solid high molecular polyester resin B, amino cross-linking agent, pearl powder, elastic powder, organic environment-friendly solvent, acid catalyst and the like. The linear high molecular polyester resin A is a polyol resin with the molecular weight of 8000-10000, and is a structural film-forming resin; the high-molecular polyester resin B is polyester resin with the molecular weight of 14000-18000 and the hydroxyl value of 4-8 mgKOH/g, and is mainly functional film forming resin; the particle size of the pearl powder is 15-25 mu m. The novel polyester oxidized pearl roller coating paint disclosed by the invention can realize continuous production, is easy to match colors, has excellent stability, full color, high hardness, good decorative performance of a paint film, excellent light and color retention and excellent weather resistance and chemical corrosion performance, ensures high adhesive force and good mechanical performance of the coating, and is an environment-friendly roller coating replacing an electrolytic oxide layer.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a novel polyester oxidized pearl roller coating and a preparation method and application thereof.
Background
The surface treatment method of the aluminum alloy building material mainly comprises four treatment methods of anodic oxidation, electrophoretic coating, fluorocarbon spraying and powder spraying, and each method has the advantages and the disadvantages.
The traditional aluminum oxide products can achieve ideal effects only through some special pre-treatments and electrolysis, the thin oxide layer of the traditional aluminum oxide products has poor protection, low corrosion resistance and hardness, difficult coloring and poor light resistance after coloring, so that the aluminum plate is not well colored and color matching, and the process is not environment-friendly.
The pearlescent paint can change a metal oxide thin layer, and can generate different pearlescent effects. Compared with other pigments, the pearlescent pigment has incomparable effect on the unique soft pearl luster. The special surface structure, high refractive index and good transparency make it create the same effect as pearl luster in a transparent medium.
Therefore, how to provide the roller coating which can be continuously produced, is easy to match colors, has excellent stability, fullness, high hardness, good paint film decorative performance, excellent gloss retention and color retention performance, excellent weather resistance and chemical corrosion performance, ensures high adhesive force and good mechanical performance of the coating and is an environment-friendly roller coating for replacing an electrolytic oxide layer.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims at providing a novel polyester oxidized pearl roller coating which can be continuously produced, is easy to match colors, has excellent stability, fullness, high hardness, good decorative performance of a paint film, excellent gloss retention and color retention performance and excellent weather resistance and chemical corrosion performance.
The invention also aims to provide a preparation method of the novel polyester oxidized pearl roller coating paint.
The invention also aims to provide application of the novel polyester oxidized pearl roller coating paint.
The invention is realized by the following technical scheme:
the novel polyester oxidized pearl roller coating paint comprises the following components in parts by weight:
the linear high molecular polyester resin A is a polyol resin with the molecular weight of 8000-10000, and is a structural film-forming resin;
the high-molecular polyester resin B is polyester resin with the molecular weight of 14000-18000 and the hydroxyl value of 4-8 mgKOH/g, and is mainly functional film forming resin; the particle size of the pearl powder is 15-25 mu m.
Preferably, the glass transition temperature of the linear high molecular polyester resin A is 5-15 ℃, the hydroxyl value is 40-60 mgKOH/g, and the acid value is 5-15 mgKOH/g; the glass transition temperature of the high-molecular polyester resin B is 40-60 ℃.
Preferably, the elastic powder is a spherical aggregate which is formed by grinding polyurethane and has an average particle diameter of 7-15 um. The elastic powder is prepared by grinding polyurethane with the average particle size of a nano structure into spherical aggregates of 7-15 um, and extremely uneven particle distribution is formed, so that excellent elastic stacking and overlapping effects of fine and smooth fluffy hand feeling are formed.
Preferably, the amino crosslinking agent is highly methylated amino resin, and the nonvolatile component of the highly methylated amino resin is more than or equal to 98 percent according to the determination of an aluminum foil method; the viscosity at 23 ℃ is 3000-6000 mPa.s; the density at 23 ℃ is 1000-1500 kg/m 3. Preferably, the amino crosslinking agent is liquid hexamethoxymethylmelamine.
Preferably, the acid catalyst is a blocked acid catalyst, and the pH value is: 6.0-7.0, active ingredients: 26% -35%, sealing and decomposing temperature: 75-85 ℃. Further preferably, the blocked acid catalyst is a blocked sulfonic acid catalyst, which can obviously reduce the film forming temperature of the coating or shorten the curing time of the coating, and the coating has high gloss, excellent surface performance, excellent weather resistance and outdoor stability. The catalyst can improve the crosslinking density, increase the hardness and luster of a paint film, and improve the corrosion resistance, hydrolysis resistance, solvent resistance and mechanical properties of the paint film.
The chemical structure and amount of the catalyst have a great influence on the adherence, corrosion resistance, flexibility and impact resistance of the coating. The present invention innovatively uses blocked sulfonic acid-based acid catalysts and unexpectedly finds particular application in the type of crosslinker of the present invention where the monomeric crosslinker "hexa (methoxymethyl) melamine (HMMM)" reacts hydroxyl or carbamate functional groups with the crosslinker.
Preferably, the organic environment-friendly solvent is one or more of mixed dibasic acid ester, ethylene glycol monoethyl ether acetate and propylene glycol monomethyl ether acetate.
Preferably, the other auxiliary agents are selected from one or more of the following: leveling agent and defoaming agent.
Preferably, the other auxiliary agents and the parts by weight thereof are 0.5 to 1 of the leveling agent; 0.5-1% of defoaming agent.
Preferably, the leveling agent is one or a mixture of aralkyl modified polydimethylsiloxane, polyacrylate, silicon-containing acrylate or hydrogenated castor oil; the defoaming agent is one or a mixture of benzoin and dimethyl polysiloxane.
The preparation method of the novel polyester oxidized pearl roller coating paint comprises the following steps:
1. firstly, crushing the high-molecular polyester resin B, uniformly mixing the pearl powder and the crushed high-molecular polyester resin B in proportion by using a binding process to obtain a mixture C, wherein the temperature of the binding process is controlled to be 40-60 ℃, and the particle size of the pearl powder is controlled to be 15-25 mu m;
2. adding part of the organic environment-friendly solvent in proportion, controlling the rotating speed at 500-700 r/min, adding the mixture C while dispersing, and continuing to stir for 20-40 minutes after the mixture C is completely wetted to obtain a mixture D;
3. putting the linear high molecular polyester resin A, the elastic powder and the organic environment-friendly solvent into a dispersion cylinder according to a proportion, mixing, controlling the rotating speed at 500-700 r/min, and dispersing for 20-40 min to be liquid; and adding the mixture D, the flatting agent, the defoaming agent, the organic environment-friendly solvent and the acid catalyst in proportion, and continuously keeping the rotating speed to disperse uniformly to obtain the novel polyester oxidized pearl roller coating paint.
Preferably, the particle size of the crushed high molecular polyester resin B is 10-20 μm.
Preferably, the binding process comprises the steps of stirring and mixing the crushed high-molecular polyester resin B and pearl powder at a high speed, controlling the temperature at 40-60 ℃, and introducing nitrogen as protective gas to obtain a more stable mixture C.
The invention also provides application of the novel polyester oxidized pearl roller coating paint in the industries of buildings, general industry, home appliances, furniture, communication equipment, automobile accessories and the like, wherein the coating thickness of the novel polyester oxidized pearl roller coating paint is 10-30 um, and preferably 15-20 um.
Compared with the prior art, the invention has the following beneficial effects:
the novel polyester oxidized pearl roller coating paint disclosed by the invention can realize continuous production, is easy to match colors, has excellent stability, full color, high hardness, good decorative performance of a paint film, excellent light and color retention and excellent weather resistance and chemical corrosion performance, ensures high adhesive force and good mechanical performance of the coating, and is an environment-friendly roller coating replacing an electrolytic oxide layer.
The paint of the invention is superior to products with similar formulas in gloss, adhesion, hardness, MEK wiping resistance (times), impact resistance, T-bend performance and the like, and obtains unexpected technical effects.
Detailed Description
The following examples are given to specifically describe the present invention, but are not limited thereto. The raw materials used in the examples and comparative examples were all commercially available.
Examples 1 to 3 and comparative examples 1 to 8
The preparation method of the polyester oxidized pearl roller coating paint of the embodiments 1 to 3 and the comparative examples 1 to 8 comprises the following steps:
1. firstly, crushing the high-molecular polyester resin B, uniformly mixing the pearl powder and the crushed high-molecular polyester resin B in proportion by using a binding process to obtain a mixture C, wherein the temperature of the binding process is controlled to be 40-60 ℃, and the particle size of the pearl powder is controlled to be 15-25 mu m;
2. adding part of the organic environment-friendly solvent in proportion, controlling the rotating speed at 500-700 r/min, adding the mixture C while dispersing, and continuing to stir for 20-40 minutes after the mixture C is completely wetted to obtain a mixture D;
3. putting the linear high molecular polyester resin A, the elastic powder and the organic environment-friendly solvent into a dispersion cylinder according to a proportion, mixing, controlling the rotating speed at 500-700 r/min, and dispersing for 20-40 min to be liquid; and adding the mixture D, the flatting agent, the defoaming agent, the organic environment-friendly solvent and the acid catalyst in proportion, and continuously keeping the rotating speed to disperse uniformly to obtain the novel polyester oxidized pearl roller coating paint.
TABLE 1 raw material tables for examples 1 to 3 and comparative examples 1 to 8
TABLE 2 concrete proportions (in parts by weight) of the components in the examples and comparative examples
Comparative examples 10 to 15
The preparation method of the polyester oxidized pearl roller coating paint of comparative examples 10 to 15 is the same as that of example 1, and the formulation is different as shown in Table 3:
TABLE 3 formulation tables for comparative examples 10 to 15
Note: "/" indicates that the composition is the same as in example 1.
Application example 1
The coatings prepared in the above examples and comparative examples are applied to alloy plates of building suspended ceilings by a roller coating process, and after post-treatment, the impact resistance, pencil hardness, adhesion, neutral salt spray resistance and other properties of the coatings are detected, the specific detection standards are shown in table 4, and the test results are shown in tables 5 and 6.
TABLE 4 test standards
TABLE 5 Performance test data for each of the examples and comparative examples
Table 6 performance test data for each comparative sample
From the results in table 5, it is clear that the novel polyester oxidized pearl roller coating coatings of examples 1 to 3 have good impact resistance, pencil hardness, adhesion, bending resistance, neutral salt spray, and the like.
However, it is understood from comparative examples 1 and 2 that the addition of a small amount or a large amount of pearl powder significantly increases the gloss of the sample, and affects the metallic texture, the touch elasticity, and the like of the product. As can be seen from comparative examples 3 and 4, the use amount of the elastic powder has a significant influence on T-bend performance and gloss, for example, the gloss is obviously different and cannot have a proper matte effect; it has also been unexpectedly found that when the amount of the elastic powder used is reduced, the T-bend performance and the tactile elasticity of the product are significantly reduced. It was unexpectedly found from comparative examples 5 and 6 that the amount of amino crosslinker used significantly affected T-bend performance and hardness, MEK rub resistance. It was unexpectedly found from comparative examples 7 and 8 that the acid catalyst affected hardness and MEK rub resistance. It was unexpectedly found from comparative example 9 that the ratio of the amounts of the linear high molecular weight polyester resin A and the high molecular weight polyester resin B significantly affects the hardness, gloss and hand.
From table 6, comparative examples 10 and 11, it can be seen that the particle size of the pearl powder directly and significantly affects the gloss of the product. Comparative examples 12 and 13 show that the physicochemical properties of the linear polymeric polyester resin A significantly affect the gloss, hardness, T-bend performance, etc. of the product. Comparative examples 14 and 15 show that the solid high molecular weight polyester resin B exerts a significant influence on gloss, T-bend property and hardness.
In summary, it can be seen from comparative examples 1 to 15 that the difference in the physicochemical properties or the amounts of any raw materials in the formula of the present invention significantly affects the performance of the final product. The inventor of the invention obtains the product technical scheme with optimal performance through a great amount of innovative exploration.
The novel polyester oxidized pearl roller coating paint provided by the invention achieves unexpected technical effects. The coating of the invention can be used in the industries of buildings, general industries, home appliances, furniture, communication equipment, automobile accessories and the like on a large scale.
Claims (8)
1. The polyester oxidized pearl roller coating paint is characterized by comprising the following components in parts by weight:
linear high molecular polyester resin A45-50
Solid high molecular polyester resin B8-10
10-12 of amino crosslinking agent
15-25 parts of pearl powder
Elastic powder 1-3
5-8 parts of organic environment-friendly solvent
Acid catalyst 0.2-0.5
Other auxiliaries 1-2
The linear high molecular polyester resin A is a polyol resin with the molecular weight of 8000-10000, and is a structural film-forming resin;
the high-molecular polyester resin B is polyester resin with the molecular weight of 14000-18000 and the hydroxyl value of 4-8 mgKOH/g, and is mainly functional film forming resin;
the particle size of the pearl powder is 15-25 mu m;
the glass transition temperature of the linear high molecular polyester resin A is 5-15 ℃, the hydroxyl value is 40-60 mgKOH/g, and the acid value is 5-15 mgKOH/g; the glass transition temperature of the high-molecular polyester resin B is 40-60 ℃;
the elastic powder is formed by grinding polyurethane, and the average particle diameter of the elastic powder is a spherical aggregate of 7-15 mu m;
the preparation method comprises the following steps:
firstly, crushing the high molecular polyester resin B, uniformly mixing the pearl powder and the crushed high molecular polyester resin B in proportion by using a bonding process to obtain a mixture C, wherein the temperature of the bonding process is controlled to be 40-60 ℃, and the particle size of the pearl powder is controlled to be 15-25 mu m;
the amino crosslinking agent is highly methylated amino resin; the acid catalyst is a blocked acid catalyst.
2. The polyester oxidized pearl roller coating paint as claimed in claim 1, wherein the nonvolatile components of the highly methylated amino resin measured by an aluminum foil method are more than or equal to 98 percent; the viscosity at 23 ℃ is 3000-6000 mPa.s; the density at 23 ℃ is 1000-1500 kg/m3。
3. The polyester oxidized pearl roll coating of claim 1, wherein the blocked acid catalyst has a pH value of: 6.0-7.0, active ingredients: 26% -35%, sealing and decomposing temperature: 75-85 ℃.
4. The polyester oxidized pearl roller coating paint as claimed in claim 1, wherein the organic environment-friendly solvent is one or more of mixed dibasic acid ester, ethylene glycol ethyl ether acetate and propylene glycol methyl ether acetate.
5. The preparation method of the polyester oxidized pearl roller coating paint according to any one of claims 1 to 4, which is characterized by comprising the following steps:
1. firstly, crushing the high molecular polyester resin B, uniformly mixing the pearl powder and the crushed high molecular polyester resin B in proportion by using a bonding process to obtain a mixture C, wherein the temperature of the bonding process is controlled to be 40-60 ℃, and the particle size of the pearl powder is controlled to be 15-25 mu m;
2. adding part of the organic environment-friendly solvent in proportion, controlling the rotating speed at 500-700 r/min, adding the mixture C while dispersing, and continuing to stir for 20-40 minutes after the mixture C is completely wetted to obtain a mixture D;
3. putting the linear high molecular polyester resin A, the elastic powder and the organic environment-friendly solvent into a dispersion cylinder according to a proportion, mixing, controlling the rotating speed at 500-700 r/min, and dispersing for 20-40 min to be liquid; and adding the mixture D, the flatting agent, the defoaming agent, the organic environment-friendly solvent and the acid catalyst in proportion, and continuously keeping the rotating speed to disperse uniformly to obtain the polyester oxidized pearl roller coating.
6. The method for preparing the polyester oxidized pearl roller coating paint as claimed in claim 5, wherein the particle size of the crushed high molecular polyester resin B is 10-20 μm.
7. The preparation method of the polyester oxidized pearl roller coating paint as claimed in claim 5, wherein the bonding process comprises the steps of stirring and mixing the crushed high-molecular polyester resin B and pearl powder at a high speed, controlling the temperature at 40-60 ℃, and introducing nitrogen as a protective gas to obtain a more stable mixture C.
8. The use of the polyester oxidized pearl roller coating paint according to any one of claims 1 to 4 in coating building materials, general industries, household appliances, furniture, communication equipment and automobile accessories.
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| CN112646460A (en) * | 2020-12-18 | 2021-04-13 | 力同化工(佛山)有限公司 | Roller coating hand-feeling gloss oil |
| CN113999607B (en) * | 2021-11-09 | 2022-07-29 | 广东歌丽斯化学有限公司 | Film-coated adhesive coating and preparation method and application thereof |
| CN117567924B (en) * | 2024-01-15 | 2024-03-22 | 福建安能新材料股份有限公司 | Chemical-resistant surface coating |
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| CN104031535B (en) * | 2014-06-26 | 2016-10-05 | 广州立邦涂料有限公司 | A kind of low dumb light polyester finish coat and preparation method thereof |
| CN109735249B (en) * | 2018-12-27 | 2021-04-30 | 合肥乐凯科技产业有限公司 | Matte paint protective film |
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