CN111534191A - Salt-fog-resistant primer for coiled material household appliance - Google Patents
Salt-fog-resistant primer for coiled material household appliance Download PDFInfo
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- CN111534191A CN111534191A CN202010304380.3A CN202010304380A CN111534191A CN 111534191 A CN111534191 A CN 111534191A CN 202010304380 A CN202010304380 A CN 202010304380A CN 111534191 A CN111534191 A CN 111534191A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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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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Abstract
The invention discloses a salt spray resistant primer for coiled materials for household appliances, which comprises the following raw materials in percentage by weight: 10-50% of straight-chain saturated polyester resin, 10-50% of epoxy resin, 1-20% of amino resin, 1-20% of isocyanate, 1-20% of antirust pigment and 10-30% of solvent. Wherein the rust-preventive pigment is selected from calcium ion-exchange silica gel, surface-active-enhanced silica and modified phosphate compounds. The primer for the coiled material household appliance simultaneously contains the three anti-rust pigments, so that the corrosion resistance of the primer is greatly improved, and the conventional performance of the primer is not affected; meanwhile, the primer takes linear saturated polyester resin with good flexibility and large molecular weight as main resin, isocyanate with excellent chemical resistance and amino resin beneficial to hardness improvement as crosslinking resin, so that the primer has excellent corrosion resistance, excellent application property, chemical resistance and good processability.
Description
Technical Field
The invention relates to the technical field of coil coating. More particularly relates to a salt spray resistant primer for coiled material household appliances.
Background
In recent years, with the continuous and high-speed increase of economic construction in China, the application field of the precoated metal coil is continuously expanded, and the market demand is continuously increased. The surface of the precoated metal coil is coated and can be directly subjected to various machining and forming processes, so that the precoated metal coil is required to have high strength and good machining performance, and simultaneously required to have good corrosion resistance and physical shielding performance.
In recent years, the demand of precoated metal coils in the household appliance industry has increased significantly, and as the consumption has progressed into the maturity stage, higher requirements are being placed on the durability of the precoated metal coils. The coiled material also needs to have excellent corrosion resistance on the basis of meeting the requirements of surface decoration, processability and temperature resistance. The coil primer is the basis of the entire coating system and has a significant influence on the corrosion protection properties of the coating. The salt spray resistance is an important index of the corrosion resistance of the coating, so that the primer for the coiled material household appliance with excellent salt spray resistance is very important to provide.
Disclosure of Invention
The invention aims to provide a salt spray resistant primer for coiled material household appliances, which takes linear saturated polyester resin with good flexibility, moderate glass transition temperature and large molecular weight as main resin, takes aliphatic polyisocyanate closure and high imino carbinol etherified melamine formaldehyde resin as cross-linked resin, and combines with anti-corrosive pigments with different anti-corrosive mechanisms and special auxiliary agents, so that the primer has excellent corrosion resistance, excellent workability, chemical resistance and good processability.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a salt spray resistant primer for coiled materials and household appliances, which comprises the following raw materials in percentage by weight:
wherein the rust-preventive pigment is selected from calcium ion-exchange silica gel, surface-active-enhancing silica and modified phosphate compounds.
Preferably, the raw materials of the salt spray resistant primer for the coiled material household appliances comprise the following components in percentage by weight:
the hydroxyl value of the straight-chain saturated polyester resin is 50-80mgKOH/g, the weight-average molecular weight is 8000-10000, and the glass transition temperature is 10-40 ℃.
The acid value of the straight-chain saturated polyester resin is 0-8mgKOH/g, and the solid content is 50-70%.
The weight average molecular weight of the epoxy resin is 10000-100000.
The amino resin is selected from one or more of melamine formaldehyde resin, methylated melamine resin, butylated melamine resin, methylated urea formaldehyde resin, butylated urea formaldehyde resin and benzoguanamine formaldehyde resin.
The amino resin is preferably high imino carbinol etherified melamine formaldehyde resin.
The isocyanate is an aliphatic polyisocyanate blocking compound.
The aliphatic polyisocyanate blocking substance is selected from one or more of hexamethylene diisocyanate, isophorone diisocyanate and dicyclohexylmethane-4, 4' -diisocyanate blocking substance.
The solvent is selected from one or more of propylene glycol methyl ether acetate, butyl acetate, S150 solvent oil and dibasic ester mixed solvent DBE.
Optionally, the raw materials of the primer for salt-fog-resistant coiled material household appliances further include, by weight:
the invention has the following beneficial effects:
the salt spray resistant primer for coiled material household appliances provided by the invention uses a linear chain saturated polyester resin with good flexibility, moderate glass transition temperature and large molecular weight as a main body resin, uses an aliphatic polyisocyanate closure with excellent chemical resistance and flexibility and a high imino carbinol etherified melamine formaldehyde resin with improved scratch resistance and hardness as a cross-linked resin, and combines with anti-rust pigments (calcium ion exchange silica gel, surface active silica and modified phosphate compounds) with different mechanisms and special auxiliaries such as a flatting agent, a defoaming agent, an adhesion promoter and the like, so that the primer has excellent corrosion resistance and also has excellent workability, chemical resistance and good processability. Particularly, the combination of the three anti-rust pigments greatly improves the corrosion resistance of the primer for the coiled material household appliance, and has no any adverse effect on the conventional performance. The primer has excellent adhesion with a metal substrate, the processing performance of the matched finish paint is 3T, no peeling and no crack, the MEK wiping resistance is more than 150 times, and the primer has good boiling resistance, acid and alkali resistance, salt mist resistance and other performances.
Detailed Description
The technical solution of the present invention is further described in detail with reference to specific examples. The particular materials, amounts, data, and other conditions and details set forth in the examples are intended to be illustrative of the invention and are not intended to limit the scope of the invention. All simple modifications, equivalent changes and modifications made in accordance with the spirit of the present invention fall within the scope of the claims of the present application.
The salt spray resistant primer for the coiled material household appliances comprises the following raw materials in percentage by weight:
wherein the rust-preventive pigment is selected from calcium ion-exchange silica gel, surface-active-enhancing silica and modified phosphate compounds.
In a preferred embodiment, the raw materials of the salt spray resistant primer for the coil household appliances comprise the following components in percentage by weight:
the polyester resin in the present invention is a linear saturated polyester resin, which is obtained by polycondensation of a polyol having a linear structure and a polybasic acid, has a linear structure, and has excellent flexibility. The primer for the coiled material household appliances, which is prepared by using the linear chain saturated polyester resin with good flexibility, moderate glass transition temperature and large molecular weight as the main resin, using the isocyanate with excellent chemical resistance and the amino resin beneficial to improving the hardness as the cross-linked resin, and matching with the anti-rust pigment combinations with different anti-corrosion mechanisms and the special auxiliary agents, has excellent corrosion resistance, excellent workability, chemical resistance and good processability.
One possible embodiment is that the linear saturated polyester resin has a hydroxyl value of 50 to 80mgKOH/g, a weight average molecular weight of 8000-10000, and a glass transition temperature of 10 to 40 ℃; the acid value of the straight-chain saturated polyester resin is 0-8mgKOH/g, and the mass solid content is 50-70%. The linear chain saturated polyester resin can be crosslinked and cured with isocyanate and amino resin, and when the linear chain saturated polyester resin is used for the coil primer, the good balance between hardness and flexibility can be obtained. In a specific implementation, a suitable linear saturated polyester resin, such as NP110 RJZ from Nippon, is commercially available.
One possible embodiment is that the weight average molecular weight of the epoxy resin is preferably 10000-. The epoxy resin can be subjected to ring opening by using a plurality of compounds containing active hydrogen, and is used for the coil primer, a paint film after crosslinking and curing contains abundant polar groups such as hydroxyl, ether bond and the like, good adhesion is provided for recoating and finishing of a metal substrate and a multi-layer primer, and good chemical resistance and corrosion resistance are achieved. In a specific implementation, suitable epoxy resins are commercially available, such as EPIKOTE 828EL and NPSN-901X 75.
One possible embodiment is that the amino resin is selected from one or more of melamine formaldehyde resin, methylated melamine resin, butylated melamine resin, methylated urea formaldehyde resin, butylated urea formaldehyde resin, and benzoguanamine formaldehyde resin. The amino resin is beneficial to improving the scratch resistance of the primer and improving the hardness of the coating, and is preferably high imino carbinol etherified melamine formaldehyde resin. In a specific embodiment, suitable amino resins are commercially available, such as YP5629, YP5627B, CYMEL 325 and the like.
One possible embodiment is that the isocyanate is preferably an aliphatic polyisocyanate sealer and the polyester paint film cured with the isocyanate has an excellent balance of flexibility, hardness and weatherability. In specific embodiments, suitable aliphatic polyisocyanate blocking compounds, such as blocking compounds of hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate, and the like, are commercially available.
The anti-rust pigment is a pigment with certain chemical activity, and is used in a primer to change the surface property of a metal substrate or utilize the characteristics of a reaction product so as to achieve the purpose of preventing or retarding the corrosion of the metal substrate. The anti-rust pigment provided by the invention comprises calcium ion exchange silica gel, surface activity enhancing silicon dioxide and a modified phosphate compound, and can be selected according to the expected anti-corrosion effect.
It should be noted that the three anti-rust pigments provided by the present invention have different anti-corrosion mechanisms. The calcium ion exchange silica gel can intercept corrosive ions entering the coating on the surface of silicon dioxide, exchange the corrosive ions with calcium ions adsorbed on the surface of the silica gel, and transfer the released calcium ions to a metal coating interface to form a compact impermeable calcium ion layer, thereby playing a role in blocking the corrosive ions and protecting a substrate. Enhancing surface active silica with SiO2The surface of the main body is modified to have certain activity. When corrosive factors such as chloride ions, water, oxygen and the like erode to the metal surface to carry out oxidation corrosion, a microcell structure is formed on the critical surface of the coating and the substrate, and then SiO2The active ingredient is activated to make SiO2Partially dissolved into silicate ions, and then reacts with iron ions to generate iron silicate which is deposited on the surface of the substrate and in gaps of the coating, thereby protecting the substrate and effectively enhancing the compactness of the coating. When water vapor permeates into the coating, the modified phosphate antirust pigment, such as aluminum tripolyphosphate, can be dissociated into tripolyphosphate ions with strong complexing ability, and the tripolyphosphate ions react with iron ions to generate a complex protective film taking the iron tripolyphosphate as a main body. The phosphate protective film is insoluble in water, has high hardness and strong adhesion with a substrate metal, can effectively prevent further corrosion reaction, and achieves excellent anti-corrosion effect. In addition, the tripolyphosphate ions can slowly depolymerize with the action of penetrating moisture and are converted into low molecular compounds and orthophosphate, and newly generated orthophosphate ions have higher activity and can further form a passive film on the metal surface. The three anti-rust pigments are used simultaneously, so that the corrosion resistance of the primer for the coiled material household appliance can be effectively enhanced.
One possible embodiment is that the solvent is selected from one or more of propylene glycol methyl ether acetate, butyl acetate, S150 solvent oil and dibasic ester mixed solvent DBE.
The salt spray resistant primer for coil appliances provided by the present invention may also include other components that are commonly used to improve the manufacture, processing, handling and application of primers and further improve the specific function of the cured paint film, as is well known to those skilled in the art. The primer for the salt-fog-resistant coiled material household appliance particularly preferably comprises pigment, filler, catalyst, wetting dispersant, adhesion promoter, anti-settling agent, leveling agent, defoaming agent and the like.
In a preferred embodiment, the salt spray resistant primer for coil home appliances further comprises the following raw materials in percentage by weight:
the weight percentage of the components is calculated by taking the total weight of the salt spray resistant coiled material household primer as 100 percent.
Optional components of the present invention include pigments, which have hiding power, tinting strength, and relatively light stable characteristics. Pigments suitable for use with the coil home appliance primers of the present invention include titanium dioxide, iron oxide yellow, iron oxide red, cobalt blue, and cobalt titanate green, among others, and may vary depending on the desired color or appearance of the coating. The pigment is present in an amount of 0 to 25%, preferably 0 to 15% by weight based on the total weight of the primer.
Optional components of the invention include fillers, which are mainly used to increase the volume of the dry film, play a role in filling, reduce the cost, and improve the properties of the coating, such as glossiness, leveling property, water permeability resistance and the like. Fillers suitable for use with the coil home appliance basecoat of the present invention include calcium carbonate, magnesium silicate, aluminum silicate, calcium sulfate, crystalline silica, precipitated barium sulfate, and double salts thereof. The filler is present in an amount of 0 to 25%, preferably 0 to 15% by weight based on the total weight of the primer.
Optional components of the present invention include a catalyst, preferably a blocked catalyst, preferably one or more of p-toluene sulfonic acid (p-TSA), dinonyl naphthalene sulfonic acid (DNNSA), dinonyl naphthalene disulfonic acid (DNNDSA), dodecyl benzene sulfonic acid (DDBSA) blocking substances, suitable for use with the coil home appliance primers of the present invention. The catalyst is present in an amount of 0 to 5%, preferably 0 to 2% by weight based on the total weight of the primer.
The optional components of the invention comprise wetting dispersant, and the wetting dispersant suitable for being used together with the primer for the coil home appliances is preferably alkali polyurethane copolymer, so that the dispersion time can be effectively shortened, the pigment is prevented from thickening, and the coating dispersion system is ensured to be in a stable state. The wetting and dispersing agent is present in an amount of 0 to 5%, preferably 0 to 1%, based on the total weight of the primer.
The optional components of the invention comprise an adhesion promoter, and the adhesion promoter suitable for being used together with the primer for the coiled material household appliance is preferably a polyethylene oxide phosphate compound, so that the interlayer adhesion effect can be effectively improved, and the water resistance and the chemical resistance are improved. The adhesion promoter accounts for 0-5%, preferably 0-2% of the total weight of the primer.
The optional components of the invention comprise a leveling agent, and the leveling agent suitable for being used together with the primer for the coil home appliances is preferably a leveling agent of an acrylic resin system, and is used for reducing the surface tension of the coating, enhancing the wetting effect and promoting the coating to form a smooth and flat paint film in the curing and film-forming process. The leveling agent accounts for 0 to 5 percent of the total weight of the primer, and preferably 0 to 1 percent.
Optional components of the present invention include defoamers, preferably those of the acrylic resin system, suitable for use with the coil home appliance primers of the present invention, which break down primarily by reducing the surface tension of the bubbles to thin the cell walls. The defoaming agent accounts for 0 to 5 percent of the total weight of the primer, and preferably accounts for 0 to 1 percent of the total weight of the primer.
The solution provided by the present invention will be further explained with reference to specific embodiments.
It should be noted that the performance detection in all embodiments of the present invention is performed according to the national standard GB/T13448-2006, and the detection result meets the requirements of the national standard GB/T13448-2006.
The following examples used the following information for the main materials:
table 1 main materials used in the examples
| Name (R) | Classification |
| NP110RJZ | Straight chain saturated polyester resin |
| NPSN-901×75 | Epoxy resin |
| CYMEL 325 | High imino carbinol etherified melamine formaldehyde resin |
| BIR-1110 | Blocked polyisocyanates |
| SHIELDEX CS311 | Antirust pigment (calcium ion exchange silica gel (calcium ion content 1 ‰)) |
| AC3 | Antirust pigment (calcium ion exchange silica gel (calcium ion content 6 per mill)) |
| NP001PIC | Rust-proof pigment (surface active silicon dioxide) |
| STENICPHOS ZCA | Rust-proof pigment (calcium-aluminium modified polyphosphoric acid silicate hydrate) |
| K-WHITE G105 | Antirust pigment (modified aluminium tripolyphosphate) |
| TEGO DISPERS 710 | Wetting dispersant (alkali polyurethane copolymer solution) |
| SN-7063 | Adhesion promoter (polyethylene oxide phosphate) |
| MPA 1078X | Anti-settling agent |
| LEVELER S | Acrylic resin leveling agent |
| DISPARLON L-1984-50S | Defoaming agent |
Example 1
The primers for coil home appliances were prepared according to the materials shown in table 2. The method comprises the following specific steps:
adding saturated polyester resin, propylene glycol methyl ether acetate, butyl acetate, a wetting dispersant and an anti-settling agent into a container, uniformly stirring, and then adding titanium dioxide R-996, precipitated barium sulfate, an anti-rust pigment AC3, NP001 PIC and K-WHITEG 105. After grinding to the fineness of not more than 10 mu m, adding epoxy resin, amino resin, isocyanate, an adhesion promoter, a flatting agent, a defoaming agent and a catalyst, uniformly stirring, adjusting the viscosity of the composition at 25 ℃ to 120 +/-10 seconds by using a T-4 cup, filtering and packaging to obtain the salt spray resistant primer for the coiled material household appliance.
Coating primer to prepare a plate: the prepared primer is coated on a pretreated galvanized Haler passivated substrate by a wire bar roller, and is baked in an oven at 300 ℃ for 24s, and the temperature of a metal plate is PMT 216 ℃, so that the primer with the film thickness of 5 mu m is obtained.
Finishing paint coating and plate making: a commercially available Libang FLC188 polyester topcoat was wire-bar coated onto the basecoat of this example and baked in a 300 ℃ oven for 30 seconds at a sheet metal temperature PMT of 224 ℃ to give a topcoat having a film thickness of 15 μm.
Examples 2 to 3
The primers for coil home appliances were prepared according to the method provided in example 1, with the materials shown in table 2.
TABLE 2 composition of the primer for household electrical coil appliances in examples 1-3
| Classification | Name (R) | Example 1 | Example 2 | Example 3 |
| Straight chain saturated polyester resin | NP110 RJZ | 21.49 | 21.49 | 21.49 |
| Epoxy resin | NPSN-901×75 | 34.3 | 34.3 | 34.3 |
| Amino resin | CYMEL 325 | 2.85 | 2.85 | 2.85 |
| Isocyanates | BIR-1110 | 5.46 | 5.46 | 5.46 |
| Pigment (I) | Titanium white R-996 | 10.28 | 10.28 | 10.28 |
| Filler material | Precipitated barium sulfate | 10.28 | 10.28 | 10.28 |
| Rust-proof pigment | SHIELDEX CS311 | 3.6 | ||
| Rust-proof pigment | AC3 | 0.45 | 0.3 | |
| Rust-proof pigment | NP001 PIC | 2.75 | 3.6 | 1 |
| Rust-proof pigment | STENICPHOS ZCA | 1 | ||
| Rust-proof pigment | K-WHITE G105 | 2.4 | 1.7 | |
| Catalyst and process for preparing same | NAX URETHANE ACCELERATOR | 3 | 3 | 3 |
| Wetting and dispersing agent | TEGO DISPERS 710 | 0.19 | 0.19 | 0.19 |
| Adhesion promoter | SN-7063 | 1.5 | 1.5 | 1.5 |
| Leveling agent | LEVELER S | 0.47 | 0.47 | 0.47 |
| Defoaming agent | DISPARLON L-1984-50S | 0.38 | 0.38 | 0.38 |
| Anti-settling agent | MPA 1078X | 0.37 | 0.37 | 0.37 |
| Solvent(s) | Propylene glycol methyl ether acetate | 3.74 | 3.74 | 3.74 |
| Solvent(s) | Acetic acid butyl ester | 3.73 | 3.73 | 3.73 |
| Diluent | N-450 diluent | 15 | 15 | 15 |
And (3) performance testing: the performance of the plates of examples 1-3 was tested according to GB/T13448-. Wherein, table 3 is the conventional performance test result of the coating, and table 4 is the salt spray resistance SST 500h test result of the coating.
Table 3 results of conventional performance test of the primers for home roll goods in examples 1 to 3
| Item | Example 1 | Example 2 | Example 3 |
| Primer PMT (. degree.C.) | 216 | 216 | 216 |
| (primer + topcoat) film thickness (. mu.m) | 5+15 | 5+15 | 5+15 |
| T-bend, no spalling/no cracking | 3T/3T | 3T/3T | 3T/3T |
| Cupping (7mm) | Grade 5 | Grade 5 | Grade 5 |
| Hundred grids | Grade 5 | Grade 5 | Grade 5 |
| MEK wiping without revealing primer | >150 | >150 | >150 |
| Boiling in boiling water for 2 h/impact 9J | Grade 5 | Grade 5 | Grade 5 |
| Boiling water for 2 h/cross-shaped cross cupped projection of 7mm | Grade 5 | Grade 5 | Grade 5 |
| Resistant sulfuric acid (5%, 24h) | 8/8 | 8/8 | 8/8 |
| Resistant sulfuric acid (5%, 48h) | 8/6 | 8/6 | 8/4 |
| Sodium hydroxide resistant (5%, 24h) | 8/6 | 8/4 | 8/6 |
| Sodium hydroxide resistant (5%, 48h) | 8/2 | 8/2 | 8/2 |
Table 4 results of the salt spray resistance SST 500h test of the primers for home electrical coil appliances in examples 1 to 3
| Example 1 | Example 2 | Example 3 | |
| SST 100 h-forking unilateral maximum corrosion mm | 0 | 0 | 0 |
| SST 150 h-time-cutting unilateral maximum corrosion mm | 0 | 0.5 | 0.5 |
| SST 200 h-forking unilateral maximum corrosion mm | 0.5 | 0.5 | 1 |
| SST 240h single-edge maximum corrosion mm | 1 | 1 | 1 |
| SST 300 h-forking unilateral maximum corrosion mm | 1 | 1.5 | 1.5 |
| SST 350h maximum corrosion mm of single side of fork | 1.5 | 2 | 1.5 |
| SST 400 h-crossed single-side maximum corrosion mm | 1.5 | 2 | 2 |
| SST 450h single-edge maximum corrosion mm | 2 | 2.5 | 2.5 |
| SST 500 h-time-cutting unilateral maximum corrosion mm | 2 | 2.5 | 2.5 |
The results in tables 3 and 4 show that the primer for coil home appliances, which is provided by the invention and contains three kinds of anti-rust pigments, namely calcium ion-exchange silica gel, surface-active-increased silica and modified phosphate compounds, has excellent corrosion resistance, and the conventional performance of the primer is not influenced by the anti-rust pigments and still keeps an excellent state.
Comparative example
Comparative examples 1 to 3
The primers for coil home appliances were prepared according to the method provided in example 1, with the materials shown in table 5. Comparative example 1 contains only a rust inhibitive pigment of calcium ion-exchanged silica gel, comparative example 2 contains only a rust inhibitive pigment of surface-active reinforcing silica, and comparative example 3 contains only a rust inhibitive pigment of modified phosphate compounds.
TABLE 5 composition of priming paint for household electrical coil appliances in comparative examples 1 to 3
| Classification | Name (R) | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Straight chain saturated polyester resin | NP110 RJZ | 21.49 | 21.49 | 21.49 |
| Epoxy resin | NPSN-901×75 | 34.3 | 34.3 | 34.3 |
| Amino resin | CYMEL 325 | 2.85 | 2.85 | 2.85 |
| Isocyanates | BIR-1110 | 5.46 | 5.46 | 5.46 |
| Pigment (I) | Titanium white R-996 | 10.28 | 10.28 | 10.28 |
| Filler material | Precipitated barium sulfate | 10.28 | 10.28 | 10.28 |
| Rust-proof pigment | SHIELDEX CS311 | |||
| Rust-proof pigment | AC3 | 5.6 | ||
| Rust-proof pigment | NP001 PIC | 5.6 | ||
| Rust-proof pigment | STENICPHOS ZCA | |||
| Rust-proof pigment | K-WHITE G105 | 5.6 | ||
| Catalyst and process for preparing same | NAX URETHANE ACCELERATOR | 3 | 3 | 3 |
| Wetting and dispersing agent | TEGO DISPERS 710 | 0.19 | 0.19 | 0.19 |
| Adhesion promoter | SN-7063 | 1.5 | 1.5 | 1.5 |
| Leveling agent | LEVELER S | 0.47 | 0.47 | 0.47 |
| Defoaming agent | DISPARLON L-1984-50S | 0.38 | 0.38 | 0.38 |
| Anti-settling agent | MPA1078X | 0.37 | 0.37 | 0.37 |
| Solvent(s) | Propylene glycol methyl ether acetate | 3.74 | 3.74 | 3.74 |
| Solvent(s) | Acetic acid butyl ester | 3.73 | 3.73 | 3.73 |
| Diluent | N-450 diluent | 15 | 15 | 15 |
And (3) performance testing: the performance of the plates prepared in comparative examples 1-3 was tested according to the national standard GB/T13448-2006, and the results are shown in tables 6 and 7. Wherein, table 6 is the conventional performance test result of the coating, and table 7 is the salt spray resistance SST 500h test result of the coating.
Table 6 results of conventional performance test of the primers for roll goods in comparative examples 1 to 3
Table 7 results of the salt spray resistance SST 500h test of the primers for home electric appliances for coil in comparative examples 1 to 3
| Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| SST 100 h-forking unilateral maximum corrosion mm | 1 | 1 | 1 |
| SST 150 h-time-cutting unilateral maximum corrosion mm | 1.5 | 1 | 1.5 |
| SST 200 h-forking unilateral maximum corrosion mm | 2 | 1.5 | 2 |
| SST 240h single-edge maximum corrosion mm | 2 | 2 | 2.5 |
| SST 300 h-forking unilateral maximum corrosion mm | 2.5 | 3 | 3 |
| SST 350h maximum corrosion mm of single side of fork | 3 | 3.5 | 3.5 |
| SST 400 h-crossed single-side maximum corrosion mm | 4 | 4 | 4 |
| SST 450h single-edge maximum corrosion mm | 5 | 5 | 5 |
| SST 500 h-time-cutting unilateral maximum corrosion mm | 6 | 5.5 | 6 |
The results in tables 6 and 7 show that the salt spray corrosion resistance of the primer for coil home appliances comprising only any one of three types of anticorrosive pigments of calcium ion-exchanged silica, surface-active silica or modified phosphate-based compound is inferior to that of the primers for coil home appliances of examples 1 to 3 comprising the three types of anticorrosive pigments, particularly, the maximum corrosion of one side of SST 450h-500h exceeds 5 mm.
Comparative examples 4 to 6
The primers for coil home appliances were prepared according to the method provided in example 1, with the materials shown in table 8. Comparative example 4 contains only two rust inhibitive pigments of calcium ion-exchanged silica gel and surface-active-enhancement silica, comparative example 5 contains only two rust inhibitive pigments of calcium ion-exchanged silica gel and modified phosphate compound, and comparative example 6 contains only two rust inhibitive pigments of surface-active-enhancement silica and modified phosphate compound.
TABLE 8 composition of primers for home electric coil appliances in comparative examples 4 to 6
And (3) performance testing: the performance of the plates prepared in comparative examples 4-6 was tested according to the national standard GB/T13448-2006, and the results are shown in tables 9 and 10. Wherein, table 9 is the conventional performance test result of the coating, and table 10 is the salt spray resistance SST 500h test result of the coating.
TABLE 9 results of conventional Performance test of the primers for coil home appliances in comparative examples 4 to 6
| Item | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| Primer PMT (. degree.C.) | 216 | 216 | 216 |
| (primer + topcoat) film thickness (. mu.m) | 5+15 | 5+15 | 5+15 |
| T-bend, no spalling/no cracking | 3T/3T | 3T/3T | 3T/3T |
| Cupping (7mm) | Grade 5 | Grade 5 | Grade 5 |
| Hundred grids | Grade 5 | Grade 5 | Grade 5 |
| MEK wiping without revealing primer | >150 | >150 | >150 |
| Boiling in boiling water for 2 h/impact 9J | Grade 5 | Grade 5 | Grade 5 |
| Boiling water for 2 h/cross-shaped cross cupped projection of 7mm | Grade 5 | Grade 5 | Grade 5 |
| Resistant sulfuric acid (5%, 24h) | 10/10 | 10/10 | 8/8 |
| Resistant sulfuric acid (5%, 48h) | 8/8 | 10/10 | 8/4 |
| Sodium hydroxide resistant (5%, 24h) | 8/4 | 10/10 | 8/6 |
| Sodium hydroxide resistant (5%, 48h) | 2/2 | 2/2 | 2/2 |
TABLE 10 salt spray resistance SST 500h test results for the primers for coil home appliances in comparative examples 4 to 6
| Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| SST 100 h-forking unilateral maximum corrosion mm | 0.5 | 0.5 | 0.5 |
| SST 150 h-time-cutting unilateral maximum corrosion mm | 1 | 1 | 1 |
| SST 200 h-forking unilateral maximum corrosion mm | 1 | 1.5 | 1.5 |
| SST 240h single-edge maximum corrosion mm | 1.5 | 2 | 2 |
| SST 300 h-forking unilateral maximum corrosion mm | 2 | 2.5 | 3 |
| SST 350h maximum corrosion mm of single side of fork | 2.5 | 3 | 3.5 |
| SST 400 h-crossed single-side maximum corrosion mm | 2.5 | 3.5 | 3.5 |
| SST 450h single-edge maximum corrosion mm | 3 | 4 | 4 |
| SST 500 h-time-cutting unilateral maximum corrosion mm | 4 | 4.5 | 5 |
The results in tables 9 and 10 show that the salt spray corrosion resistance of the primer for coil home appliances comprising any two of the three rust inhibitive pigments of calcium ion exchanged silica gel, surface-active-increased silica and modified phosphate-based compound is inferior to that of the primers for coil home appliances of examples 1 to 3 comprising the three rust inhibitive pigments at the same time, but slightly superior to that of the primers for coil home appliances of comparative examples 1 to 3 comprising only any one of the three rust inhibitive pigments.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that other variations and modifications of the present invention can be made based on the above description, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed, and all such modifications and variations are possible and contemplated as falling within the scope of the invention.
Claims (10)
1. The salt spray resistant primer for the coiled material household appliances is characterized by comprising the following raw materials in percentage by weight:
wherein the rust-preventive pigment is selected from calcium ion-exchange silica gel, surface-active-enhancing silica and modified phosphate compounds.
2. The salt spray resistant primer for coiled materials and household appliances, according to claim 1, is characterized by comprising the following raw materials in percentage by weight:
3. the primer for salt spray resistant coiled material household appliances as claimed in claim 1 or 2, wherein the hydroxyl value of the linear saturated polyester resin is 50-80mgKOH/g, the weight average molecular weight is 8000-10000, and the glass transition temperature is 10-40 ℃.
4. The salt spray resistant primer for coil household appliances according to claim 1 or 2, wherein the linear saturated polyester resin has an acid value of 0 to 8mgKOH/g and a mass solid content of 50 to 70%.
5. The primer for salt spray resistant coiled material household appliances according to claim 1, wherein the weight average molecular weight of the epoxy resin is 10000-100000.
6. The salt spray resistant primer for coiled material household appliances according to claim 1 or 2, wherein the amino resin is one or more selected from melamine formaldehyde resin, methylated melamine resin, butylated melamine resin, methylated urea formaldehyde resin, butylated urea formaldehyde resin and benzoguanamine formaldehyde resin.
7. The salt spray resistant primer for coiled material household appliances according to claim 1 or 2, wherein the amino resin is a high imino carbinol etherified melamine formaldehyde resin.
8. The salt spray resistant primer for coil household appliances according to claim 1 or 2, wherein the isocyanate is an aliphatic polyisocyanate sealer; preferably, the aliphatic polyisocyanate blocking is selected from one or more of the blocking of hexamethylene diisocyanate, isophorone diisocyanate and dicyclohexylmethane-4, 4' -diisocyanate.
9. The salt spray resistant primer for coil home appliances according to claim 1 or 2, wherein the solvent is one or more selected from propylene glycol methyl ether acetate, butyl acetate, S150 solvent oil and dibasic ester mixed solvent DBE.
10. The salt spray resistant primer for coil household appliances according to any one of claims 1 to 9, wherein the primer comprises the following raw materials in percentage by weight:
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| CN115286978A (en) * | 2022-03-31 | 2022-11-04 | 中海油常州涂料化工研究院有限公司 | General primer capable of being bonded with high polymer film for coiled material and preparation method thereof |
| CN115558373A (en) * | 2022-10-11 | 2023-01-03 | 广州集泰化工股份有限公司 | Water-based epoxy primer for rail transit and preparation method thereof |
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