CN109354989B - High-performance stable water-based yellow automobile refinishing paint and preparation method thereof - Google Patents
High-performance stable water-based yellow automobile refinishing paint and preparation method thereof Download PDFInfo
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- CN109354989B CN109354989B CN201810998653.1A CN201810998653A CN109354989B CN 109354989 B CN109354989 B CN 109354989B CN 201810998653 A CN201810998653 A CN 201810998653A CN 109354989 B CN109354989 B CN 109354989B
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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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- 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
- C09D7/20—Diluents or solvents
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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
- 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
- C08L2205/03—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
Abstract
The invention provides a high-performance stable water-based yellow automobile refinishing paint which is composed of the following components in parts by weight: 6-20 parts of resin, 3-10 parts of cosolvent, 6-30 parts of pulp, 0.2-1 part of wetting agent A, 0.5-3 parts of thickening agent, 0.2-2 parts of 2-amino-2-methyl-1-propanol and 20-60 parts of deionized water; the slurry consists of the following components in parts by weight: 25-60 parts of deionized water, 6-18 parts of dispersing agent, 20-30 parts of yellow pigment, 3-20 parts of cosolvent, 0.5-2 parts of wetting agent B, 0.2-1 part of defoaming agent, 0.2-1 part of anti-settling agent and 0.1 part of ionic liquid. The invention also provides a preparation method of the high-performance stable water-based yellow automobile refinishing paint. The high-performance stable water-based yellow automobile refinishing paint provided by the invention has better stability, mildew resistance, water resistance and low temperature resistance.
Description
Technical Field
The invention relates to an automobile refinishing paint, in particular to a high-performance stable water-based yellow automobile refinishing paint and a preparation method thereof.
Background
The automobile repair paint is used for repairing original automobile body paint, and the worker works with the hand, so that the spraying operation must be performed at low temperature (below 60 ℃). The automotive refinish must perform two functions: a protective function and an aesthetic function, which cannot be independently performed by a single product. Therefore, high-quality refinish paint brands are generally combined by series of products, which mainly comprise: greasy class: the method is used for filling the defects of the metal plate. Base paints: it is used for rust prevention, promoting the adhesion between paint layers and increasing the thickness of the paint film. Paints for enamels: used for improving surface quality and increasing weather resistance. Because the whole automobile can not be baked at high temperature and the painting condition of a general automobile repairing factory is poor, the automobile repairing paint and the renovating paint are mainly self-drying priming paint, putty, intermediate paint, self-drying synthetic resin paint, volatile drying type nitrolacquer, perchloroethylene paint and the like.
The Chinese patent with the application number of CN201410489250.6 provides an efficient automobile refinishing paint which comprises the following components in parts by weight: 3-8 parts of a dispersing agent, 7-15 parts of methyl methacrylate, 2-8 parts of butyl acrylate, 3-6 parts of phthalocyanine blue, 4-7 parts of polyethylene glycol monomethyl ether methacrylate, 5-9 parts of diester film-forming assistant, 2-4 parts of a defoaming agent, 7-11 parts of modified hydroxyl acrylic resin, 2-5 parts of a drier, 4-6 parts of an organic solvent, 8-11 parts of tert-hexadecane thiol and 2-6 parts of reflective glass beads. The patent has problems in that it is poor in stability, mold resistance, water resistance and low temperature resistance.
Disclosure of Invention
The invention aims to provide the high-performance stable water-based yellow automobile refinishing paint which has better stability, mildew resistance, water resistance and low temperature resistance.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high-performance stable water-based yellow automobile refinishing paint comprises the following components in parts by weight: 6-20 parts of resin, 3-10 parts of cosolvent, 6-30 parts of pulp, 0.2-1 part of wetting agent A, 0.5-3 parts of thickening agent, 0.2-2 parts of 2-amino-2-methyl-1-propanol and 20-60 parts of deionized water;
the slurry consists of the following components in parts by weight: 25-60 parts of deionized water, 6-18 parts of dispersing agent, 20-30 parts of yellow pigment, 3-20 parts of cosolvent, 0.5-2 parts of wetting agent B, 0.2-1 part of defoaming agent, 0.2-1 part of anti-settling agent and 0.1 part of ionic liquid.
Further, the resin provided by the invention is one or two of PUA and PUD.
Furthermore, the cosolvent is one or more of isopropanol, ethylene glycol monobutyl ether, n-amyl alcohol, propylene glycol methyl ether acetate, sec-butyl alcohol and ethylene glycol tertiary butyl ether.
Further, the wetting agent A of the present invention is a polyether siloxane copolymer.
Further, the thickening agent is one or more of polyacrylic acid, polyacrylamide and polyurethane.
Further, the dispersant of the invention is one of a polybasic carboxylic acid salt solution of polyamine amide and a high molecular weight block copolymer solution with pigment affinity groups.
Furthermore, the wetting agent B is one of polyether siloxane and hyperbranched polyether.
Further, the defoaming agent is one of organic silicon and mineral oil; the yellow pigment is one of iron oxide yellow, transparent iron oxide yellow, benzidine yellow, lemon yellow, yellow disazo pigment and yellow monoazo pigment; the anti-settling agent is one or more of magnesium lithium silicate, polyamide wax, fumed silica and bentonite.
Further, the preparation steps of the ionic liquid are as follows:
A1. dissolving 1, 3-propane sultone in acetone to obtain a1, 3-propane sultone solution with the concentration of 4mol/L, putting the 1, 3-propane sultone solution into ice water, dripping 1-vinyl imidazole with the same mol as that of the 1, 3-propane sultone, stirring for 5 days at room temperature to obtain a solid, washing the solid with acetone for 3 times, and then drying in vacuum to obtain an intermediate product;
A2. and D, adding the intermediate product obtained in the step A1, an initiator and sodium dodecyl sulfate into an ethanol aqueous solution, stirring for 35min under the protection of nitrogen, heating to 75 ℃, adding divinylbenzene with the same mole as 1, 3-propane sultone, continuing to perform heat preservation stirring reaction for 10h to obtain a reaction liquid, demulsifying the reaction liquid with methanol, centrifuging, and performing vacuum drying to obtain the ionic liquid.
The invention also aims to provide a preparation method of the high-performance stable water-based yellow automobile refinishing paint.
In order to solve the technical problems, the technical scheme is as follows:
a preparation method of a high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, a cosolvent, a wetting agent B, a dispersing agent, a defoaming agent, an anti-settling agent and ionic liquid into a shaking machine, shaking for 5-10min, adding yellow pigment, and shaking for 120-300min at a shaking frequency of 1500-2000w power and 750-1000r/min until the fineness of the materials is less than 5 mu m to obtain slurry;
B2. adding the resin, the deionized water and the cosolvent into a stirrer under the stirring condition, stirring at the rotating speed of 500r/min for 1-3min and then adding the slurry, stirring at the rotating speed of 1200r/min for 5-10min and then sequentially adding the wetting agent A and the thickening agent, stirring at the rotating speed of 1200r/min for 5-10min and then adding the 2-amino-2-methyl-1-propanol to adjust the pH to 8.0-9, stirring until the viscosity of the material is 800 mPa.s and then continuously stirring for 4-8min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
Compared with the prior art, the invention has the following beneficial effects:
1) the cosolvent selected by the invention can ensure that the viscosity of the paste is unchanged and has no sedimentation after being stored for 30 days at 50 ℃, the hue color difference after silver flushing is less than or equal to 0.2, the viscosity of the paint is unchanged and has no sedimentation after being stored for 30 days at 50 ℃, the change of the front side surface after silver flushing is very small, and the hue change (hexagonal chromatism) color difference is less than or equal to 0.2, thereby greatly improving the stability of the invention; in addition, the co-solvent can also greatly improve the mildew resistance of the invention.
2) The resin selected by the invention can greatly improve the water resistance of a paint film, and does not foam, wrinkle or fall off within 360 hours at the temperature of 40 +/-2 ℃.
3) The dispersant selected by the invention can effectively improve the dispersibility of each component, thereby further improving the stability, mildew resistance and water resistance of the invention.
3) The ionic liquid is synthesized by taking 1, 3-propane sultone, 1-vinyl imidazole, divinylbenzene and the like as raw materials, the compatibility and the bonding strength among all components can be effectively improved, and the stability of the ionic liquid is very good, so that the stability, the mildew resistance and the water resistance of the ionic liquid can be further reduced and improved; in addition, the ionic liquid has strong low-temperature resistance, so that the low-temperature resistance of the invention can be effectively improved.
Detailed Description
The present invention will be described in detail with reference to specific embodiments, and the exemplary embodiments and descriptions thereof herein are provided to explain the present invention but not to limit the present invention.
Example 1
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: PUA6 parts, isopropanol 10 parts, pulp 10 parts, polyether siloxane copolymer 0.5 parts, polyacrylic acid 1 part, 2-amino-2-methyl-1-propanol 1 part and deionized water 50 parts; the pulp consists of the following components in parts by weight: 50 parts of deionized water, 12 parts of polybasic carboxylic acid salt solution of polyamine amide, 20 parts of iron oxide yellow, 20 parts of isopropanol, 0.8 part of polyether siloxane, 0.4 part of organic silicon, 0.2 part of magnesium lithium silicate and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, isopropanol, polyether siloxane, polycarboxylic acid salt solution of polyamine amide, organic silicon, magnesium lithium silicate and ionic liquid into a shaking machine, shaking for 5min, adding iron oxide yellow, and shaking for 200min at 2000w power and 800r/min shaking frequency until the fineness of the material is less than 5 microns to obtain slurry;
B2. under the stirring condition, adding PUA, deionized water and isopropanol into a stirring machine, stirring for 2min at the rotating speed of 420r/min, adding slurry, stirring for 10min at the rotating speed of 800r/min, sequentially adding polyether siloxane copolymer and polyacrylic acid, stirring for 9min at the rotating speed of 1100r/min, adding 2-amino-2-methyl-1-propanol, adjusting the pH to 8.0-9, stirring until the viscosity of the material is 800-1500 mPa.s, and then continuously stirring for 5min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
Example 2
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: 20 parts of PUD, 3 parts of ethylene glycol monobutyl ether, 20 parts of pulp, 0.8 part of polyether siloxane copolymer, 1.5 parts of polyacrylamide, 0.5 part of 2-amino-2-methyl-1-propanol and 40 parts of deionized water; the pulp consists of the following components in parts by weight: 30 parts of deionized water, 10 parts of high molecular weight block copolymer with pigment affinity groups, 30 parts of transparent iron oxide yellow, 3 parts of ethylene glycol monobutyl ether, 1.5 parts of hyperbranched polyether, 0.6 part of mineral oil, 0.4 part of polyamide wax and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, ethylene glycol monobutyl ether, hyperbranched polyether, high molecular weight block copolymer with pigment affinity group, mineral oil, polyamide wax and ionic liquid into a shaking machine, shaking for 10min, adding transparent iron oxide yellow, and shaking for 250min at 1500w power and 900r/min shaking frequency until the fineness of the material is less than 5 mu m to obtain slurry;
B2. under the stirring condition, adding PUD, deionized water and ethylene glycol monobutyl ether into a stirrer, stirring at the rotating speed of 440r/min for 1.5min, then adding slurry, stirring at the rotating speed of 1200r/min for 5min, then sequentially adding polyether siloxane copolymer and polyacrylamide, stirring at the rotating speed of 1050r/min for 7min, then adding 2-amino-2-methyl-1-propanol, adjusting the pH to 8.0-9, stirring until the viscosity of the material is 800-1500 mPa.s, and then continuously stirring for 4min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
Example 3
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: PUA and PUD 10 parts, n-amyl alcohol 8 parts, pulp 6 parts, polyether siloxane copolymer 1 part, polyacrylamide 2 parts, 2-amino-2-methyl-1-propanol 1.5 parts and deionized water 60 parts; the pulp consists of the following components in parts by weight: 25 parts of deionized water, 18 parts of high molecular weight block copolymer with pigment affinity groups, 25 parts of benzidine yellow, 10 parts of n-amyl alcohol, 1.4 parts of hyperbranched polyether, 0.5 part of mineral oil, 0.6 part of fumed silica and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, n-amyl alcohol, hyperbranched polyether, high molecular weight block copolymer with pigment affinity groups, mineral oil, fumed silica and ionic liquid into a shaking machine, shaking for 6min, adding benzidine yellow, and shaking for 300min at 1900w power and 750r/min shaking frequency until the fineness of the material is less than 5 microns to obtain slurry;
B2. under the stirring condition, adding PUA, PUD, deionized water and n-amyl alcohol into a stirrer, stirring at the rotating speed of 450r/min for 1.2min, then adding slurry, stirring at the rotating speed of 900r/min for 9min, then sequentially adding polyether siloxane copolymer and polyurethane, stirring at the rotating speed of 1000r/min for 5min, then adding 2-amino-2-methyl-1-propanol to adjust the pH value to 8.0-9, stirring until the viscosity of the materials is 800-1500 mPas, and then continuing stirring for 7min to obtain the high-performance stable water-based yellow automobile refinishing paint.
Example 4
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: 15 parts of PUD, 6 parts of propylene glycol methyl ether acetate, 30 parts of pulp, 0.2 part of polyether siloxane copolymer, 0.8 part of polyurethane, 1.8 parts of 2-amino-2-methyl-1-propanol and 20 parts of deionized water; the pulp consists of the following components in parts by weight: 60 parts of deionized water, 6 parts of high molecular weight block copolymer with pigment affinity groups, 21 parts of lemon yellow, 15 parts of propylene glycol methyl ether acetate, 1.8 parts of polyether siloxane, 0.8 part of organic silicon, 0.8 part of bentonite and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, propylene glycol methyl ether acetate, polyether siloxane, a high molecular weight block copolymer with a pigment affinity group, organic silicon, bentonite and ionic liquid into a shaking machine, shaking for 7min, adding lemon yellow, and shaking for 120min at 1800w power and 1000r/min shaking frequency until the fineness of the material is less than 5 mu m to obtain slurry;
B2. under the stirring condition, adding PUD, deionized water and propylene glycol methyl ether acetate into a stirrer, stirring at the rotating speed of 480r/min for 1.4min, then adding slurry, stirring at the rotating speed of 1000r/min for 8min, then sequentially adding polyether siloxane copolymer and polyurethane, stirring at the rotating speed of 1200r/min for 10min, then adding 2-amino-2-methyl-1-propanol to adjust the pH value to 8.0-9, stirring until the viscosity of the materials is 800-1500 mPa.s, and then continuing stirring for 8min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
Example 5
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: 8 parts of PUA, 5 parts of sec-butyl alcohol, 15 parts of pulp, 0.3 part of polyether siloxane copolymer, 0.5 part of polyacrylamide, 2 parts of 2-amino-2-methyl-1-propanol and 30 parts of deionized water; the pulp consists of the following components in parts by weight: 40 parts of deionized water, 15 parts of polybasic carboxylate solution of polyamine amide, 28 parts of yellow disazo pigment, 8 parts of sec-butyl alcohol, 0.5 part of hyperbranched polyether, 1 part of organic silicon, 1 part of bentonite and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, sec-butyl alcohol, hyperbranched polyether, polycarboxylic acid solution of polyamine amide, organic silicon, bentonite and ionic liquid into a shaking machine, adding yellow disazo pigment after shaking for 9min, and shaking for 150min at 1600w power and 850r/min shaking frequency until the fineness of the material is less than 5 microns to obtain slurry;
B2. under the stirring condition, adding PUA, deionized water and sec-butyl alcohol into a stirrer, stirring for 3min at the rotating speed of 400r/min, adding slurry, stirring for 6min at the rotating speed of 1100r/min, sequentially adding polyether siloxane copolymer and polyacrylamide, stirring for 8min at the rotating speed of 1150r/min, adding 2-amino-2-methyl-1-propanol, adjusting the pH to 8.0-9, stirring until the viscosity of the material is 800-1500 mPa.s, and then continuously stirring for 6min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
Example 6
The high-performance stable water-based yellow automobile refinishing paint consists of the following components in parts by weight: PUA, PUD 14 parts, ethylene glycol tertiary butyl ether 9 parts, pulp 25 parts, polyether siloxane copolymer 0.6 part, polyacrylic acid 3 parts, 2-amino-2-methyl-1-propanol 0.2 part and deionized water 45 parts; the pulp consists of the following components in parts by weight: 45 parts of deionized water, 14 parts of polybasic carboxylate solution of polyamine amide, 27 parts of yellow monoazo pigment, 16 parts of ethylene glycol tertiary butyl ether, 1 part of polyether siloxane, 0.2 part of mineral oil, 0.5 part of fumed silica and 0.1 part of ionic liquid.
The preparation method of the high-performance stable water-based yellow automobile refinishing paint comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, ethylene glycol tert-butyl ether, polyether siloxane, a polycarboxylic acid salt solution of polyamine amide, mineral oil, fumed silica and ionic liquid into a shaking machine, shaking for 8min, adding yellow monoazo pigment, and shaking for 180min at 1700w power and 950r/min shaking frequency until the fineness of the material is less than 5 microns to obtain slurry;
B2. under the stirring condition, adding PUA, PUD, deionized water and ethylene glycol tert-butyl ether into a stirrer, stirring at the rotating speed of 500r/min for 1min, then adding slurry, stirring at the rotating speed of 1050r/min for 7min, then sequentially adding polyether siloxane copolymer and polyacrylic acid, stirring at the rotating speed of 1080r/min for 6min, then adding 2-amino-2-methyl-1-propanol to adjust the pH value to 8.0-9, stirring until the viscosity of the material is 800-1500 mPas, and then continuing stirring for 4.5min to obtain the high-performance stable aqueous yellow automobile refinishing paint.
The ionic liquids of examples 1-6 were prepared by the following steps:
A1. dissolving 1, 3-propane sultone in acetone to obtain a1, 3-propane sultone solution with the concentration of 4mol/L, putting the 1, 3-propane sultone solution into ice water, dripping 1-vinyl imidazole with the same mol as that of the 1, 3-propane sultone, stirring for 5 days at room temperature to obtain a solid, washing the solid with acetone for 3 times, and then drying in vacuum to obtain an intermediate product;
A2. and D, adding the intermediate product obtained in the step A1, an initiator and sodium dodecyl sulfate into an ethanol aqueous solution, stirring for 35min under the protection of nitrogen, heating to 75 ℃, adding divinylbenzene with the same mole as 1, 3-propane sultone, continuing to perform heat preservation stirring reaction for 10h to obtain a reaction liquid, demulsifying the reaction liquid with methanol, centrifuging, and performing vacuum drying to obtain the ionic liquid.
Reference example 1
The cosolvent ethylene glycol monobutyl ether is not included, and other components and preparation methods are the same as those in example 2.
Reference example 2
The PUD was replaced with a conventional polyurethane resin, and the other components and the preparation method were the same as in example 2.
Reference example 3
The PUA was replaced with a conventional polyurethane resin, and the other components and the preparation method were the same as in example 5.
Reference example 4
The high molecular weight block copolymer with pigment affinity group, excluding the dispersant, was prepared in the same manner as in example 2, except for the other components.
Reference example 5
The ionic liquid was excluded, and other components and preparation method were the same as example 2.
Comparative example
The comparative example is example 1 of the chinese invention having application number CN 201410489250.6.
The first experimental example: stability test
The respective automobile refinishes were tested for a change in viscosity after storage at 50 ℃ for 30 days, where the change in viscosity is (viscosity after test-viscosity before test)/viscosity before test × 100%, and a lower change in viscosity indicates better stability. The test results are shown in table 1:
| viscosity Change Rate (%) | |
| Example 1 | 0 |
| Example 2 | 0 |
| Example 3 | 0 |
| Example 4 | 0 |
| Example 5 | 0 |
| Example 6 | 0 |
| Reference example 1 | 3.89 |
| Reference example 2 | 0 |
| Reference example 3 | 0 |
| Reference example 4 | 3.21 |
| Reference example 5 | 3.77 |
| Comparative example | 10.56 |
TABLE 1
As is apparent from Table 1, the viscosity change rates of examples 1 to 6 of the present invention are all 0, indicating that the stability of the present invention is good. The components of reference examples 1-5 are different from those of examples 2 and 5, wherein the viscosity change rates of reference examples 1, 4 and 5 are increased to different degrees, which shows that the cosolvent, the dispersant and the ionic liquid can effectively improve the stability; the viscosity change ratio of reference examples 2 and 3 was also 0, indicating that the type of resin had little effect on the stability.
Experiment example two: mildew resistance test
And inoculating aspergillus niger to each automobile refinishing paint, and testing the mildew growth area rate of the surface of the paint film after 20 days, wherein the mildew growth area rate is equal to the mildew growth area/paint film area multiplied by 100 percent, and the smaller the mildew growth area rate is, the better the mildew resistance is. The test results are shown in table 2:
TABLE 2
As is apparent from Table 2, the area ratios of mold growth of examples 1 to 6 of the present invention are all 0, indicating that the mold resistance of the present invention is good. The reference examples 1-5 are different from the examples 2 and 5 in part of components, wherein the area ratios of the mildews of the reference examples 1, 4 and 5 are increased to different degrees, which shows that the cosolvent, the dispersant and the ionic liquid can effectively improve the mildew resistance; the mold growth area ratios of reference examples 2 and 3 were also 0, and it was found that the kind of the resin had almost no influence on the mold resistance.
Experiment example three: water resistance test
Each automobile refinishing paint is coated on a steel plate, then the steel plate is placed in water with the temperature of 40 +/-2 ℃, the condition of a paint film is observed after 360 hours, and the test results are shown in table 3:
TABLE 3
As is apparent from Table 3, no foaming, wrinkling or peeling occurred in any of examples 1 to 6 of the present invention, indicating that the water resistance of the present invention is superior. The compositions of reference examples 1-5 are different from those of examples 2 and 5, wherein the reference examples 2-4 have foaming, wrinkling and falling phenomena, which shows that PUA, PUD and the dispersing agent can effectively improve the water resistance; reference examples 1 and 5 show no foaming, wrinkling or peeling, and show that the co-solvent and ionic liquid have little effect on water resistance.
Experimental example four: low temperature resistance test
The glass transition temperature of each automotive refinish was tested by DMA method, with lower glass transition temperatures indicating better low temperature resistance, and the test results are shown in table 4:
| glass transition temperature (. degree. C.) | |
| Example 1 | -50.6 |
| Example 2 | -50.9 |
| Example 3 | -50.2 |
| Example 4 | -50.5 |
| Example 5 | -50.4 |
| Example 6 | -50.3 |
| Reference example 1 | -50.7 |
| Reference example 2 | -45.8 |
| Reference example 3 | -45.5 |
| Reference example 4 | -50.6 |
| Reference example 5 | -40.1 |
| Comparative example | -31.3 |
TABLE 4
As is apparent from Table 4, the glass transition temperatures of inventive examples 1 to 6 are significantly lower than those of comparative examples, indicating that the low temperature resistance of the present invention is superior. The compositions of reference examples 1-5 are different from those of examples 2 and 5, wherein the glass transition temperatures of reference examples 2, 3 and 5 are increased to different degrees, which shows that PUA, PUD and ionic liquid are all effective in improving low temperature resistance; the glass transition temperatures of reference examples 1 and 4 were almost the same as those of examples 1 to 6, and it was found that the co-solvent and the dispersant had little influence on the low temperature resistance.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (2)
1. The high-performance stable water-based yellow automobile refinishing paint is characterized in that: the composition comprises the following components in parts by weight: 6-20 parts of resin, 3-10 parts of cosolvent, 6-30 parts of pulp, 0.2-1 part of wetting agent A, 0.5-3 parts of thickening agent, 0.2-2 parts of 2-amino-2-methyl-1-propanol and 20-60 parts of deionized water;
the resin is one or two of PUA and PUD; the cosolvent is one or more of isopropanol, ethylene glycol monobutyl ether, n-amyl alcohol, propylene glycol monomethyl ether acetate, sec-butyl alcohol and ethylene glycol tert-butyl ether; the thickening agent is one or more of polyacrylic acid, polyacrylamide and polyurethane;
the slurry consists of the following components in parts by weight: 25-60 parts of deionized water, 6-18 parts of a dispersing agent, 20-30 parts of a yellow pigment, 3-20 parts of a cosolvent, 0.5-2 parts of a wetting agent B, 0.2-1 part of a defoaming agent, 0.2-1 part of an anti-settling agent and 0.1 part of an ionic liquid;
the dispersant is one of a polybasic carboxylate solution of polyamine amide and a high molecular weight block copolymer solution with pigment affinity groups; the wetting agent A is polyether siloxane copolymer; the wetting agent B is one of polyether siloxane and hyperbranched polyether; the defoaming agent is one of organic silicon and mineral oil; the yellow pigment is one of iron oxide yellow, benzidine yellow, lemon yellow, yellow disazo pigment and yellow monoazo pigment; the anti-settling agent is one or more of magnesium lithium silicate, polyamide wax, fumed silica and bentonite;
the preparation steps of the ionic liquid are as follows:
A1. dissolving 1, 3-propane sultone in acetone to obtain a1, 3-propane sultone solution with the concentration of 4mol/L, putting the 1, 3-propane sultone solution into ice water, dripping 1-vinyl imidazole with the same mol as that of the 1, 3-propane sultone, stirring for 5 days at room temperature to obtain a solid, washing the solid with acetone for 3 times, and then drying in vacuum to obtain an intermediate product;
A2. and D, adding the intermediate product obtained in the step A1, an initiator and sodium dodecyl sulfate into an ethanol aqueous solution, stirring for 35min under the protection of nitrogen, heating to 75 ℃, adding divinylbenzene with the same mole as 1, 3-propane sultone, continuing to perform heat preservation stirring reaction for 10h to obtain a reaction liquid, demulsifying the reaction liquid with methanol, centrifuging, and performing vacuum drying to obtain the ionic liquid.
2. The method of preparing a high performance stable aqueous yellow automotive refinish paint according to claim 1, characterized in that: the method comprises the following steps:
B1. weighing the components in parts by weight, sequentially adding deionized water, a cosolvent, a wetting agent B, a dispersing agent, a defoaming agent, an anti-settling agent and ionic liquid into a shaking machine, shaking for 5-10min, adding yellow pigment, and shaking for 120-300min at a shaking frequency of 1500-2000w power and 750-1000r/min until the fineness of the materials is less than 5 mu m to obtain slurry;
and B2, adding the resin, the deionized water and the cosolvent into a stirrer under the stirring condition, stirring at the rotating speed of 500r/min for 1-3min and then adding the slurry, stirring at the rotating speed of 1200r/min for 5-10min and then sequentially adding the wetting agent A and the thickening agent, stirring at the rotating speed of 1200r/min for 5-10min and then adding the 2-amino-2-methyl-1-propanol to adjust the pH to 8.0-9, stirring until the viscosity of the material is 800-1500 mPa.s, and then continuously stirring for 4-8min to obtain the high-performance stable aqueous yellow automobile repair paint.
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| CN113416472B (en) * | 2021-07-30 | 2022-03-18 | 雅图高新材料股份有限公司 | Water-based bi-component epoxy primer for racing helmet and preparation method thereof |
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| JP2002301422A (en) * | 2001-01-30 | 2002-10-15 | Kowa Industry Co Ltd | Powder painting method |
| EP1325090A2 (en) * | 2000-09-25 | 2003-07-09 | Chemetall GmbH | Method for coating metallic surfaces and use of substrates coated in such a way or coatings produced in such a way |
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| JP5290508B2 (en) * | 2005-12-22 | 2013-09-18 | 関西ペイント株式会社 | Water-based paint composition |
| CN102190952A (en) * | 2011-05-24 | 2011-09-21 | 东来涂料技术（上海）有限公司 | Environment-friendly water-based single-component metallic-effect refinish paint for automobiles and preparation method thereof |
| CN102250536A (en) * | 2011-05-24 | 2011-11-23 | 东来涂料技术（上海）有限公司 | Environmentally-friendly water-based single-component solid-color automobile refinishing paint and preparation method thereof |
| CN102277074A (en) * | 2011-07-25 | 2011-12-14 | 东来涂料技术（上海）有限公司 | Water-based automotive refinish paint with high hiding power and preparation method thereof |
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| EP1325090A2 (en) * | 2000-09-25 | 2003-07-09 | Chemetall GmbH | Method for coating metallic surfaces and use of substrates coated in such a way or coatings produced in such a way |
| JP2002301422A (en) * | 2001-01-30 | 2002-10-15 | Kowa Industry Co Ltd | Powder painting method |
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