CN112011263A - Environment-friendly abrasion-free high-solid intermediate coating and preparation method and use method thereof - Google Patents
Environment-friendly abrasion-free high-solid intermediate coating and preparation method and use method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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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
- 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
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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
Abstract
The invention discloses an environment-friendly abrasion-free high-solid intermediate coating and development of a preparation method thereof. By adopting a molecular design principle and utilizing oligomers with lower molecular weight and narrower molecular weight distribution, the Volatile Organic Compound (VOC) content and the solidification energy consumption of a coating system are reduced, the energy consumption problems of long-time drying, manual polishing and the like in the coating process of the traditional domestic automobile intermediate coating are solved, and further the coating cost such as labor cost, material cost, energy consumption and the like is reduced, and the secondary harm of dust and noise formed in the polishing process to a human body and the environment is reduced. Therefore, from the viewpoints of energy saving and environmental protection, the development of a wear-free high-solid intermediate coating is urgently needed. The preparation method has simple process, is suitable for industrial production and is put into small-scale application.
Description
Technical Field
The invention belongs to the technical field of paint preparation, and particularly relates to a low-pollution environment-friendly abrasion-free high-solid intermediate coating, and a preparation method and a use method thereof.
Background
Environmental protection has received increasing attention worldwide since the 21 st century. The solvent-based coating contains Volatile Organic Compounds (VOC), and is discharged into the atmosphere during the use process, so that the solvent-based coating is not only harmful to the health of people, but also obviously harmful to the environment. In recent years, increasingly strict regulations are made in various countries to control the emission of VOC so as to effectively control the emission of organic matters, and the development of environment-friendly coatings is a great trend in the coating industry of the new century.
With the improvement of environmental protection consciousness and the soundness of environmental protection regulations, a series of environmental protection coatings are urgently needed, various water-based coatings and powder coatings are not invented and applied, but due to the existence of various reverse factors such as customer requirements and equipment switching limitations, a transitional coating meeting the environmental protection requirements is urgently needed to be developed, the wear-free high-solid coating can be used on the original production line, the VOC emission can be obviously reduced, the energy conservation and emission reduction are really achieved at the present stage, and the unique advantage is that other environmental protection coatings do not have.
In the automobile coating industry, the intermediate coating plays an irreplaceable role in starting and stopping, the existing middle-low-solid intermediate coating and water-based intermediate coating need to be polished before the next coating, the polishing runs through the whole automobile coating process, the priming or putty scraping needs to be polished, and the surfaces of all coatings need to be polished. In the polishing process, attention needs to be paid to whether proper sand paper is selected according to the construction process, and the direction, the force and the like also need to be paid to, and if the proper sand paper is not polished, the overall effect of a paint film is seriously influenced. The requirement for polishing the middle coating is higher than that for polishing the electrophoresis, the polishing quality of the middle coating automobile body directly influences the qualification rate of the finish paint automobile body, and the defects of missing polishing or secondary polishing are strictly avoided. Polishing not only wastes time and labor, but also reduces the production efficiency, pollutes the environment, simultaneously causes material consumption, increases the labor cost, and causes secondary harm to human bodies and the environment due to dust and noise formed in the polishing process. Therefore, it is desirable to provide an environment-friendly abrasion-free high-solid intermediate coating.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an environment-friendly abrasion-free high-solid intermediate coating which has the following technical characteristics:
the method adopts a molecular design principle, introduces a copolymer with sulfonic anchoring group in the molecular chain crosslinking process, improves the wettability of inorganic pigment and filler in the coating due to the stronger anion characteristic, and changes the defect of large oil absorption of ultrahigh pigment ratio in the intermediate coating, thereby reducing the viscosity and dilution ratio of the intermediate coating. Reduce the discharge of VOC in the construction operation (the discharge of VOC is less than or equal to 420g/L and meets the national low-carbon and environmental protection requirements.)
And (II) crosslinking the high-solid-content modified hydroxyl acrylic resin with isocyanate, and introducing an AMPS polymer in a coating crosslinking process to improve the adhesiveness, the coating decoration property and the leveling property of a coating. The surface of the baked paint film is flat, and the finish paint can be directly sprayed under the condition that the middle paint film does not need to be polished, so that the good effect of starting and stopping is achieved. And the adhesive force can still reach the standard after 3 times of recoating and multiple baking.
And due to the characteristic of high solid content, the coating is different from the middle coating with medium and low solid content in the spraying construction, so that the film thickness of one-time coating is 2-3 times that of the traditional middle coating with medium and low solid content, the coating efficiency is improved, the construction time and the energy consumption are reduced, and huge economic benefits can be brought to long-term operation of enterprises.
The environment-friendly high-solid abrasion-free intermediate coat meets most requirements of customers on the performance of a coating film, and is particularly embodied in the physical and chemical properties of the coating film such as adhesion (recoatability), constant-temperature water resistance, acid and alkali resistance, neutral salt spray resistance and the like. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the environment-friendly abrasion-free high-solid medium paint comprises the following components in parts by weight:
25-40 parts of resin;
15-20 parts of pigment;
15-25 parts of a filler.
Preferably, the environment-friendly abrasion-free high-solid intermediate coat also comprises the following components in parts by weight:
0.5-6.5 parts of an auxiliary agent;
5-15 parts of a solvent.
The above raw materials are all commercially available.
Preferably, the resin is one or more of high-solid content modified acrylic resin, hydroxy acrylic resin, saturated polyester resin, cellulose acetate resin, amino resin and alkyd resin;
preferably, the pigment is one or more of titanium dioxide, carbon black and iron oxide; the filler is one or more of barium sulfate, talcum powder and calcium carbonate;
preferably, the auxiliary agent comprises one or more of a leveling agent, a drier, a dispersing agent and an anti-settling agent.
Preferably, the auxiliary agent comprises the following components in parts by weight:
anti-settling agent: 0.1-0.5 part;
a drier: 0.1-0.5 part;
leveling agent: 0.2-0.5 part;
dispersing agent: 0.5-1 part.
The auxiliary agent also comprises special auxiliary agent XZW006 (multifunctional auxiliary agent); the auxiliary agent takes polyacrylate as a main carrier, and the main molecular formula of the auxiliary agent is as follows: -CH 2CCOOHCH 3-, a mixture of predominantly surface leveling and predominantly C6 groups, with a molecular weight of less than ten thousand. The mixture mainly takes (CH 2CCH3COOCH 3) -as an auxiliary defoaming function and mainly takes C12 group as a main component, and the molecular weight is between forty thousand.
The preparation method of the auxiliary agent comprises the following steps:
weighing 67 parts by weight of 45wt% methacrylic acid (taking non-passivated butyl acrylate as a solution), 26.7 parts by weight of methyl methacrylate and 4 parts by weight of 2-hydroxyethyl acrylate as an initiator, using 2.3 parts by weight of Azobisisobutyronitrile (AIBN) as an initiator, dissolving, shaking up, transferring into a constant-temperature constant-pressure dropping reaction kettle 1 for later use, and reacting at 140 ℃ and 25MPa for 5.5-6h to obtain a polymer A; the above reaction formula is as follows, wherein m and L are natural numbers.
Mixing 10 parts by weight of Dimethylformamide (DMF), 20 parts by weight of isopropanol, 18 parts by weight of Butyl Acrylate (BA), 33 parts by weight of Methyl Methacrylate (MMA) and 16.5 parts by weight of 2-acrylamide-2-methylpropanesulfonic Acid (AMPS) to obtain a mixed solution, and then equally dividing the mixed solution into two parts for later use; firstly, adding an equal part of the mixed solution into a reaction kettle at a constant temperature of 40 ℃, then adding an equal part of Azobisisobutyronitrile (AIBN) accounting for 2.5 percent of the total mass of the mixed solution, then dropwise adding the other equal part of the mixed solvent into the reaction kettle for 2 hours, and obtaining a polymer B after the reaction is finished; the reaction formula is as follows, wherein n is a natural number;
and thirdly, mixing the polymer A and the polymer B according to the mass ratio of 1:9 to obtain a light yellow transparent viscous liquid copolymer, and diluting the light yellow transparent viscous liquid copolymer with butyl acrylate to obtain a transparent mixed solution with the weight percent of 35 percent to obtain the special auxiliary XZW 006.
The solvent is one or more of methyl n-amyl ketone, dipropylene glycol methyl ether, diethylene glycol butyl ether, dipropylene glycol butyl ether, propylene glycol methyl ether and ethylene glycol butyl ether.
The invention also aims to provide a preparation method of the environment-friendly wear-free high-solid medium-temperature paint, which is simple in preparation process and suitable for industrial production.
A preparation method of an environment-friendly abrasion-free high-solid primer surfacer comprises the following steps:
(1) premixing: adding 30-60 parts by weight of resin into a dispersion cylinder for stirring; then slowly adding 5-15 parts by weight of solvent, 0.5-1.5 parts by weight of auxiliary agent, 15-20 parts by weight of pigment and 15-20 parts by weight of filler in turn, and stirring for 30-60 minutes;
(2) grinding: grinding the uniformly premixed slurry to the fineness of less than or equal to 20 mu m by using a sand mill;
(3) preparing paint: adding the rest resin and the auxiliary agent into the ground slurry respectively,
preferably, the stirring speed in step (1) is: 1500-; the stirring speed in the step (3) is as follows: 600 and 800 r/min.
The invention also provides the application of the environment-friendly abrasion-free high-solid medium-coat paint: the abrasion-free high-solid intermediate coat is used for automobile coating and comprises the following steps:
(1) the abrasion-free high-solid middle coating is sprayed on the surfaces of automobiles and metal products and is leveled for 10-15 minutes;
(2) then baking at 70-80 deg.C for 45-60min, cooling to room temperature, and standing for 24-72 hr.
The adhesive force of the environment-friendly abrasion-free high-solid middle painting is 100/100; 100/100 after 3 cycles.
After the high-solid medium paint is further subjected to a water resistance test with the test water temperature of 40 ℃ and the test time of 10 days (40 ℃ multiplied by 10 d), the high-solid medium coating of the metal plate does not foam or change color, and the high-solid medium paint has the adhesion 100/100.
The invention has the following advantages and beneficial effects:
(1) the invention has good physical properties and leveling property, does not need polishing middle coating, directly sprays finish paint, greatly reduces the cost of artificial materials, improves the spraying efficiency, has long activation period, does not contain triphenyl, does not contain heavy metal, has VOC emission less than or equal to 420g/L, and meets the national low-carbon and environment-friendly requirements.
(2) Compared with the traditional solvent, the grinding-free high-solid middle coating disclosed by the invention is free from grinding, improves the production efficiency, reduces the labor cost, reduces the VOC (volatile organic compounds) emission, is low-carbon and environment-friendly, and cannot cause the pollution to the surrounding environment.
(3) The preparation method of the environment-friendly abrasion-free high-solid middle coating provided by the invention is simple in preparation process and suitable for industrial production.
Drawings
FIG. 1 is a chart of the infrared spectrum of polymer A of the present invention;
FIG. 2 is an infrared spectrum of the polymer B of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the case where the objects of the present invention are illustrated and explained by the following examples, the components of the composition are all explained on the general standard of parts by weight. In the present invention, the term "part" is used in the same sense as part by weight for the sake of brevity without specific mention.
Resins in the examples of the present invention: 4275 high solid content modified hydroxy acrylic resin, Jianxing Chemicals Co., Ltd
Pigments in the examples of the invention: MA100 carbon Black from Mitsubishi, Japan
The following reagents can be selected as the auxiliary agents in the embodiment of the invention:
the auxiliary agents in the embodiment of the invention are as follows: BYK110 from Bick chemical, Germany
The auxiliary agents in the embodiment of the invention are as follows: BYK358 from Bick chemical, Germany
The auxiliary agents in the embodiment of the invention are as follows: r-908 Organobentonite was purchased from Hamming Silybi chemical Co., Ltd
The auxiliary agents in the embodiment of the invention are as follows: r-972 Degussa Ltd
Solvents in the examples of the present invention: MAK Dow chemical Co., Ltd
The auxiliary agents in the embodiment of the invention are as follows: including the special adjuvant XZW006 (multifunctional adjuvant) was prepared by the laboratory itself.
The preparation method of the auxiliary agent comprises the following steps:
1) weighing 67 parts by weight of 45Wt% methacrylic acid solution using non-passivated butyl acrylate as a solvent, 26.7 parts by weight of methyl methacrylate, 4 parts by weight of 2-hydroxyethyl acrylate and 2.3 parts by weight of azobisisobutyronitrile, dissolving, shaking up, transferring into a constant-temperature and constant-pressure dropping reaction kettle, and reacting at the reaction temperature of 140 ℃ and the pressure of 25MPa for 5.5-6h to obtain a polymer A;
2) mixing 15 parts by weight of dimethylformamide, 20 parts by weight of isopropanol, 17 parts by weight of butyl acrylate, 28 parts by weight of methyl methacrylate and 16.5 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid to obtain a mixed solution, dividing the mixed solution into two parts for later use, adding an equal part of the mixed solution into a reaction kettle with the constant temperature of 40 ℃ and the pressure of 25MPa, adding an equal part of azobisisobutyronitrile accounting for 3.5 percent of the total mass of the mixed solution, adding the other equal part of the mixed solution into the reaction kettle dropwise for 2 hours to obtain a polymer B;
3) and mixing the polymer A and the polymer B according to the mass ratio of 1:9 to obtain a light yellow transparent viscous liquid copolymer, and diluting the light yellow transparent viscous liquid copolymer to 35wt% of transparent mixed solution by using butyl acrylate to obtain the special assistant XZW 006.
Example 1
Table 1 example 1 parts by weight of raw materials
The preparation of the environment-friendly abrasion-free high-solid intermediate coating in the embodiment comprises the following steps:
(1) premixing: adding 25 parts by weight of 4275 parts by weight of high-solid-content modified hydroxy acrylic resin into a dispersion cylinder for stirring; then slowly adding 8 parts by weight of MAK, 0.8 part by weight of BYK-110, 0.1 part by weight of BENGEL908, 0.3 part by weight of R-972, 20 parts by weight of 706 titanium dioxide, 15 parts by weight of 800-mesh talcum powder, 25 parts by weight of 1600-mesh superfine barium sulfate and 0.1 part by weight of carbon black MA-100 in sequence, and stirring for 30-60 minutes;
(2) grinding: grinding and premixing the uniform slurry fineness to be less than or equal to 20 mu m by using a sand mill;
(3) preparing paint: adding 0.2 weight part of 10% T-12, 0.5 weight part of BYK-358 and 5 weight part of XZW006 multifunctional auxiliary agent (35% concentration) into the ground slurry, stirring at 600-800r/min for 20-30 min, and filtering to obtain the environment-friendly abrasion-free high-solid medium-temperature paint;
the performance test method of the abrasion-free high-solid middle coating prepared in the embodiment 1 for automobile coating comprises the following results:
1. test panel preparation comprising the steps of:
(1) and (3) mixing the environment-friendly abrasion-free high-solid middle coating according to the weight ratio of 5: adding 60% isocyanate curing agent in 1 weight part, adding benzene-free diluent in 15 weight% of the original paint, adjusting the viscosity to 18-20 seconds, and spraying the paint on an automobile or a metal product, wherein the spraying step adopts a rock field 101 type spray gun, the spraying pressure is 0.4MPa, the dry film thickness is controlled to be 40-55 mu m, and the leveling time is 10-15 minutes;
(2) baking at 70-80 deg.C for 45-60min, cooling to room temperature, and standing for 24-72 hr.
2. Detection performance:
the detection method of the performance of the environment-friendly abrasion-free high-solid medium painting is shown in Table 2; the properties of example 1 are shown in Table 3;
TABLE 2 Performance test method
Table 3 properties of example 1
As can be seen from Table 3, the abrasion-free high-solid intermediate coating prepared in example 1 has excellent properties, and the properties meet the requirements of the coating process of automobiles and metal products: that is, the adhesive force is 0 grade (highest grade) after baking for 45min at 80 ℃, the adhesive force is 0 grade (highest grade) after recoating for 3 times, and the adhesive force is 0 grade (highest grade) after circulating for 3 times. After the abrasion-free high-solid intermediate coat is subjected to a water resistance test with the test water temperature of 40 ℃ and the test time of 10 days (40 ℃ multiplied by 10 d), the composite coating of the test sample plate metal plate does not foam and change color. The neutral salt spray resistant (5% NaCl solution spraying) experiment box is stored for 10 days, so that the drawn part is rusted less than 2mm, the paint film does not bubble and fall off, the original appearance of the paint film at the non-drawn part is kept, and the paint film can slightly change color.
Comparative example
Table 4 example 2 parts by weight of raw materials
(1) Premixing: adding 25 parts by weight of 4275 parts by weight of high-solid modified hydroxy acrylic resin into a dispersion cylinder for stirring; then slowly adding 8 parts by weight of MAK, 0.8 part by weight of BYK-110, 0.1 part by weight of BENGEL908, 0.3 part by weight of R-972, 20 parts by weight of 706 titanium dioxide, 15 parts by weight of 800-mesh talcum powder, 25 parts by weight of 1600-mesh superfine barium sulfate and 0.1 part by weight of carbon black MA-100 in sequence, and stirring for 30-60 minutes;
(2) grinding: grinding and premixing the uniform slurry fineness to be less than or equal to 20 mu m by using a sand mill;
(3) preparing paint: adding 0.2 weight part of 10 percent T-12 and 0.5 weight part of BYK-358 into the ground slurry, stirring at 800r/min for 20-30 min, and filtering to obtain the grinding-free high solid middle painting;
the performance test method of the abrasion-free high-solid middle coating prepared by the comparative example for automobile coating comprises the following steps:
1. test panel preparation comprising the steps of:
(1) and (3) mixing the grinding-free high-solid intermediate coating according to the ratio of 5: adding 60% isocyanate curing agent in 1 weight part, adding benzene-free diluent in 25 weight parts of the original paint, adjusting the viscosity to 18-20 seconds, and spraying the mixture on an automobile or a metal product, wherein in the spraying step, a rock field 101 type spray gun is adopted, the spraying pressure is 0.4MPa, the dry film thickness is controlled to be 40-55 mu m, and the leveling time is 10-15 minutes;
(2) baking at 70-80 deg.C for 45-60min, cooling to room temperature, and standing for 24-72 hr.
2. Detection performance:
TABLE 5 comparative example Performance test method
TABLE 6 Properties of the comparative examples
As can be seen from tables 6 and 3, the floating coats prepared in example 1 and the comparative examples have differences in the performance test data of the paint film, and the performance test of the comparative examples has certain defects, which are shown in the following specific points:
1. the leveling property of the surface of the coating film is not ideal, and the orange peel has heavier lines, so that the minimum requirement of no grinding can not be met. The film coating fresh mapping degree exceeds the measurement range; the hardness of the coating film is reduced from H to HB.
2. After 1 time of recoating, the adhesive force is 2 grade (unqualified grade), the hidden trouble of poor adhesive force exists in the whole renovation and the local repair of the coating on the surface of the automobile in practical application, the hidden trouble can cause the foaming and the corrosion of the comprehensive matched coating in the performance test of the constant temperature water resistance, and the practical test time can only reach 6 days (40 ℃ multiplied by 6 d). The standard test time is 10 days at the minimum, and the expected effect cannot be achieved. The testing time of the neutral salt spray resistance can only reach 5 days, and the standard testing time is not less than 10 days.
3. Due to the fact that the wettability of the pigment and filler is changed, the viscosity of the middle coating is thicker than that of the middle coating in example 1, and the proportion of the diluent added in the spraying construction is improved (15% is increased to 25%) than that of the middle coating in example 1, the VOC emission reaches 445g/L, which is larger than the national recommended standard that the VOC emission of the oily middle coating is less than or equal to 420 g/L.
Example 2
Table 7 example 2 parts by weight of raw materials
(1) Premixing: adding 25 parts by weight of 4275 parts by weight of high-solid-content modified hydroxy acrylic resin into a dispersion cylinder for stirring; then slowly adding 8 parts by weight of MAK, 0.8 part by weight of BYK-110, 0.1 part by weight of BENGEL908, 0.3 part by weight of R-972, 20 parts by weight of 706 titanium dioxide, 15 parts by weight of 800-mesh talcum powder, 25 parts by weight of 1600-mesh superfine barium sulfate and 0.1 part by weight of carbon black MA-100 in sequence, and stirring for 30-60 minutes;
(2) grinding: grinding and premixing the uniform slurry fineness to be less than or equal to 20 mu m by using a sand mill;
(3) preparing paint: adding 0.2 weight part of 10% T-12, 5 weight parts of BYK-358 and 1 weight part of XZW006 multifunctional auxiliary agent (the concentration is 35 Wt%) into the ground slurry, stirring at 600-800r/min for 20-30 min, and filtering to obtain the grinding-free high-solid medium-temperature paint;
the performance test method of the abrasion-free high-solid middle coating prepared in the embodiment 2 for automobile coating comprises the following results:
1. test panel preparation comprising the steps of:
(1) and (3) mixing the grinding-free high-solid intermediate coating according to the ratio of 5: adding 60% isocyanate curing agent in 1 weight part, adding benzene-free diluent in 21 weight% of the original paint, adjusting the viscosity to 18-20 seconds, and spraying the paint on an automobile or a metal product, wherein the spraying step adopts a rock field 101 type spray gun, the spraying pressure is 0.4MPa, the dry film thickness is controlled to be 40-55 mu m, and the leveling time is 10-15 minutes;
(2) baking at 70-80 deg.C for 45-60min, cooling to room temperature, and standing for 24-72 hr.
2. Detection performance:
table 8 example 2 performance testing method
Table 9 properties of example 2
As can be seen from tables 9 and 3 by comparing the basic performance tables of examples 1 and 2 (reduction of the amount of XZW006 added to 1% from 5%), the intercoat coatings prepared in examples 1 and 2 also have differences in the paint film performance test data, and the performance test data of example 2 is particularly deficient in that:
1. the leveling property of the surface of the coating film is not ideal, and the orange peel has heavier lines, so that the minimum requirement of no grinding can not be met. The film coating fresh mapping degree exceeds the measurement range; the hardness of the coating film is reduced from H to HB.
2. After 2 times of recoating, the adhesive force is 1 grade, the hidden trouble of poor adhesive force exists in the whole renovation and the local repair of the coating on the surface of the automobile in practical application, the hidden trouble can cause the foaming and the corrosion phenomena of the comprehensive matched coating in the performance test of constant temperature water resistance, and the practical test time can only reach 8 days (40 ℃ multiplied by 8 d). The standard test time is 10 days at the minimum, and the expected effect cannot be achieved. The testing time of the neutral salt spray resistance can only reach 7 days, and the standard testing time is not less than 10 days.
3. Due to the fact that the wettability of the pigment and filler is changed, the viscosity of the middle coating is thicker than that of the middle coating in example 1, and the proportion of the diluent added in the spraying construction is improved (15% is increased to 21%) than that of the middle coating in example 1, the VOC emission reaches 425g/L, which is larger than the national recommended standard that the VOC emission of the oily middle coating is less than or equal to 420 g/L.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not to be construed as limiting the embodiments of the present invention, and that various other changes and modifications may be made by those skilled in the art based on the above description. All documents mentioned in this application are incorporated by reference into this application as if each were individually incorporated by reference.
Claims (10)
1. An environment-friendly abrasion-free high-solid middle coating is characterized in that: the paint comprises the following components in parts by weight:
25-40 parts of resin;
15-20 parts of pigment;
15-25 parts of a filler.
2. The environmentally friendly abrasion-free high-solid intermediate coating method according to claim 1, wherein: the paint also comprises the following components in parts by weight:
0.5-6.5 parts of an auxiliary agent;
5-15 parts of a solvent.
3. The environment-friendly abrasion-free high-solid medium paint as claimed in claim 1, wherein: the resin is one or more of high-solid-content modified hydroxy acrylic resin; the pigment is one or more of titanium dioxide and carbon black; the filler is one or more of superfine barium sulfate and talcum powder.
4. The environment-friendly abrasion-free high-solid medium paint as claimed in claim 2, characterized in that: the auxiliary agent comprises one or more of a flatting agent, a drier, a dispersing agent and an anti-settling agent.
5. The environment-friendly abrasion-free high-solid medium paint as claimed in claim 4, wherein: the auxiliary agent comprises the following components in parts by weight:
anti-settling agent: 0.1-0.5 part;
a drier: 0.1-0.5 part;
leveling agent: 0.2-0.5 part;
dispersing agent: 0.5-1 part.
6. The environment-friendly abrasion-free high-solid medium paint as claimed in claim 5, wherein: the auxiliary agent also comprises special auxiliary agent XZW006, and the specific preparation method of the auxiliary agent is as follows:
1) weighing 67 parts by weight of 45Wt% methacrylic acid solution using non-passivated butyl acrylate as a solvent, 26.7 parts by weight of methyl methacrylate, 4 parts by weight of 2-hydroxyethyl acrylate and 2.3 parts by weight of azobisisobutyronitrile, dissolving, shaking up, transferring into a constant-temperature and constant-pressure dropping reaction kettle, and reacting at the reaction temperature of 140 ℃ and the pressure of 25MPa for 5.5-6h to obtain a polymer A;
2) mixing 15 parts by weight of dimethylformamide, 20 parts by weight of isopropanol, 17 parts by weight of butyl acrylate, 28 parts by weight of methyl methacrylate and 16.5 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid to obtain a mixed solution, dividing the mixed solution into two parts for later use, adding an equal part of the mixed solution into a reaction kettle with the constant temperature of 40 ℃ and the pressure of 25MPa, adding an equal part of azobisisobutyronitrile accounting for 3.5 percent of the total mass of the mixed solution, adding the other equal part of the mixed solution into the reaction kettle dropwise for 2 hours to obtain a polymer B;
3) and mixing the polymer A and the polymer B according to the mass ratio of 1:9 to obtain a light yellow transparent viscous liquid copolymer, and diluting the light yellow transparent viscous liquid copolymer to 35wt% of transparent mixed solution by using butyl acrylate to obtain the special assistant XZW 006.
7. The environment-friendly abrasion-free high-solid medium paint as claimed in claim 2, characterized in that: the solvent is one or more of methyl n-amyl ketone, dipropylene glycol methyl ether, diethylene glycol butyl ether, dipropylene glycol butyl ether, propylene glycol methyl ether and ethylene glycol butyl ether.
8. A method for preparing the environment-friendly abrasion-free high-solid medium paint as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:
(1) premixing: adding 25-40 parts by weight of resin into a dispersion cylinder for stirring; then slowly adding 5-15 parts by weight of solvent, 0.5-1.5 parts by weight of auxiliary agent, 15-20 parts by weight of pigment and 15-20 parts by weight of filler in turn, and stirring for 30-60 minutes;
(2) grinding: grinding the uniformly premixed slurry to the fineness of less than or equal to 20 mu m by using a sand mill;
(3) preparing paint: and respectively adding the rest resin and the auxiliary agent into the ground slurry, and uniformly stirring to obtain the environment-friendly grinding-free high-solid medium-coat paint.
9. The preparation method of the environment-friendly abrasion-free high-solid medium painting paint as claimed in claim 8, characterized in that: the stirring speed in the step (1) is as follows: 1500-; the stirring speed in the step (3) is as follows: 600 and 800 r/min.
10. The use method of the environment-friendly abrasion-free high-solid medium painting paint as claimed in any one of claims 1 to 7, wherein the method comprises the following steps: the environment-friendly abrasion-free high-solid intermediate coat is used for coating automobiles and metal products and comprises the following steps:
a. the environment-friendly abrasion-free high-solid middle coating is sprayed on the surface of an automobile or a metal product, and the leveling time is 10-15 minutes;
b. then baking at 70-80 deg.C for 45-60min, cooling to room temperature, and standing for 24-48 hr.
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| CN202010875009.2A CN112011263A (en) | 2020-08-27 | 2020-08-27 | Environment-friendly abrasion-free high-solid intermediate coating and preparation method and use method thereof |
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| CN202010875009.2A CN112011263A (en) | 2020-08-27 | 2020-08-27 | Environment-friendly abrasion-free high-solid intermediate coating and preparation method and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861811A (en) * | 2021-10-26 | 2021-12-31 | 江苏海晟涂料有限公司 | High-adhesion middle coating for metal surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396717A (en) * | 2013-07-25 | 2013-11-20 | 佛山市三水灏诚合成树脂有限公司 | Wallpaper water-based paint, preparation method thereof and wallpaper |
| CN104395358A (en) * | 2012-06-21 | 2015-03-04 | 比克化学股份有限公司 | Ionic bonding group-containing comb polymers |
| CN105860713A (en) * | 2016-06-22 | 2016-08-17 | 漳州鑫展旺化工有限公司 | Antibacterial polishing-free water-based floating coat and preparation method thereof |
| JP2018188608A (en) * | 2017-05-11 | 2018-11-29 | 佐藤 好明 | Manufacturing method of adsorbent for waterproof, cutoff of building construction and shell non adhesion coating of ship's bottom, and cutoff adsorbent construction method |
| CN109535977A (en) * | 2018-11-28 | 2019-03-29 | 立邦涂料（中国）有限公司 | Coating combination and purposes in a kind of Multifunctional quick-drying type of large arch dam |
-
2020
- 2020-08-27 CN CN202010875009.2A patent/CN112011263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104395358A (en) * | 2012-06-21 | 2015-03-04 | 比克化学股份有限公司 | Ionic bonding group-containing comb polymers |
| CN103396717A (en) * | 2013-07-25 | 2013-11-20 | 佛山市三水灏诚合成树脂有限公司 | Wallpaper water-based paint, preparation method thereof and wallpaper |
| CN105860713A (en) * | 2016-06-22 | 2016-08-17 | 漳州鑫展旺化工有限公司 | Antibacterial polishing-free water-based floating coat and preparation method thereof |
| JP2018188608A (en) * | 2017-05-11 | 2018-11-29 | 佐藤 好明 | Manufacturing method of adsorbent for waterproof, cutoff of building construction and shell non adhesion coating of ship's bottom, and cutoff adsorbent construction method |
| CN109535977A (en) * | 2018-11-28 | 2019-03-29 | 立邦涂料（中国）有限公司 | Coating combination and purposes in a kind of Multifunctional quick-drying type of large arch dam |
Non-Patent Citations (4)
| Title |
|---|
| 曾晓鹰等: "《电子束固化涂料及应用》", 30 June 2014, 天津大学出版社 * |
| 王中华: "《钻井液化学品设计与新产品开发》", 30 November 2006, 西北大学出版社 * |
| 王艳艳: "水性双组份快干中涂性能影响因素的研究", 《涂料技术与文摘》 * |
| 祁鲁梁等: "《水处理药剂及材料适应手册》", 31 March 2000 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861811A (en) * | 2021-10-26 | 2021-12-31 | 江苏海晟涂料有限公司 | High-adhesion middle coating for metal surface |
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