CN114316749B - Magnesium alloy UV piano black paint for vehicle - Google Patents
Magnesium alloy UV piano black paint for vehicle Download PDFInfo
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- CN114316749B CN114316749B CN202111576674.2A CN202111576674A CN114316749B CN 114316749 B CN114316749 B CN 114316749B CN 202111576674 A CN202111576674 A CN 202111576674A CN 114316749 B CN114316749 B CN 114316749B
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Abstract
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 3-5 parts of initiator, 10-15 parts of ethyl acetate, 3-8 parts of propylene glycol methyl ether, 10-15 parts of trimethylolpropane triacrylate, 8-10 parts of tripropylene glycol diacrylate, 20-30 parts of modified epoxy acrylate resin, 8-12 parts of difunctional urethane acrylate resin, 15-20 parts of hexafunctional urethane acrylate resin, 6-10 parts of polycarbon modified urethane acrylate, 2-4 parts of thermoplastic acrylic resin and 0.5-1 part of flatting agent. The magnesium alloy UV piano black paint for vehicles has the characteristics of high film forming property, high construction efficiency and high hardness.
Description
Technical Field
The invention relates to the technical field of baking varnish coatings, in particular to a magnesium alloy UV piano black paint for vehicles.
Background
At present, a lot of coating materials are coated on the surface layer of a magnesium alloy material in the market, the paints are only used in some consumer products with low performance requirements, the paints are used in automotive interior parts and often cannot meet the performance requirements of the automotive interior parts, especially parts of a multimedia console, are exposed to high temperature for a long time under a windshield or placed under ice-cold conditions, and the performance requirements of the paints are many times higher than those of the consumer products; for example, the magnesium alloy paint in the past can only pass 80 ℃ for 30 minutes in the boiling performance test, the requirement of the automotive interior part is 100 ℃ for 2 hours, the xenon lamp test in the weather resistance test is not required, and the like.
The conventional multimedia center console bracket of an automobile is made of a PC (polycarbonate) and ABS (acrylonitrile butadiene styrene), the conventional material is replaced by a magnesium alloy material in order to improve the better stability of the product and reduce the defects of abnormal sound, deformation and the like of the product in the long-term use process, and if the magnesium alloy material is sprayed by paint made of the PC and ABS material, the requirement on many performances such as unqualified adhesive force and the like cannot be met.
Disclosure of Invention
The invention aims to provide a vehicle-mounted magnesium alloy UV piano black paint which has the characteristics of high film forming property, high construction efficiency and high hardness.
The invention can be realized by the following technical scheme:
the invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 3-5 parts of initiator, 10-15 parts of ethyl acetate, 3-8 parts of propylene glycol methyl ether, 10-15 parts of trimethylolpropane triacrylate, 8-10 parts of tripropylene glycol diacrylate, 20-30 parts of modified epoxy acrylate resin, 8-12 parts of difunctional urethane acrylate resin, 15-20 parts of hexafunctional urethane acrylate resin, 6-10 parts of polycarbon modified urethane acrylate, 2-4 parts of thermoplastic acrylic resin and 0.5-1 part of flatting agent. The magnesium alloy UV piano black paint for vehicles has the characteristics of high film forming property, high construction efficiency and high hardness.
Further, the initiator is a composite initiator and comprises 184 initiator and TPO initiator, wherein the mass ratio of the 184 initiator to the TPO initiator is 6:1.
further, the leveling agent is a composite leveling agent, and the composite leveling agent comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5.
Furthermore, the type of the modified epoxy acrylate resin is 2142, the type of the difunctional urethane acrylate resin is HP2000, the type of the hexafunctional urethane acrylate resin is 9010, the type of the polycarbon modified urethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%.
Further, the preparation method of the finish paint comprises the following steps: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
Further, the finish paint also comprises a diluent, wherein the proportion of the diluent is 1.
Further, the diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
Further, the primer is an epoxy curing system primer, and the epoxy curing system primer comprises the following components in parts by mass: 93 parts of semi-finished color paste, 5 parts of epoxy resin, 1.5 parts of butyl acetate and 0.5 part of 3700 acrylate leveling agent with 10 percent of solid content.
Further, the semi-finished color paste comprises the following components in parts by mass: 12 parts of butyl acetate, 5 parts of n-butanol, 2 parts of dispersant BYK163, 2 parts of Degussa No. 6 carbon powder, 35 parts of epoxy resin, 18.5 parts of 2000-mesh A90 talcum powder, 10.5 parts of barium sulfate, 10 parts of aluminum tripolyphosphate and 5 parts of zinc phosphate.
Further, the medium paint comprises the following components in parts by mass: 3451 hydroxyl acrylic resin with low hydroxyl value 45 parts, special modified resin 15 parts, drier T-12 0.05 part, E1011 extinction powder 3 parts, PU color paste 21 parts, butyl acetate 8.95 parts, butanone 6 parts, and LTW resin 1 part.
The magnesium alloy UV piano black paint for the vehicle has the following beneficial effects:
the magnesium alloy UV piano black paint for vehicles adopts an epoxy curing system as a primer, selects a PU system with better workability and drying property and lower hydroxyl value as a medium paint, selects polyurethane acrylate resin with different functionalities, polycarbon modified polyurethane acrylate and modified epoxy acrylate to prepare the UV light curing finish paint, and has the advantages of fast film forming property, fast construction efficiency and high hardness.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following provides a detailed description of the product of the present invention with reference to the examples.
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 3-5 parts of initiator, 10-15 parts of ethyl acetate, 3-8 parts of propylene glycol methyl ether, 10-15 parts of trimethylolpropane triacrylate, 8-10 parts of tripropylene glycol diacrylate, 20-30 parts of modified epoxy acrylate resin, 8-12 parts of difunctional urethane acrylate resin, 15-20 parts of hexafunctional urethane acrylate resin, 6-10 parts of polycarbon modified urethane acrylate, 2-4 parts of thermoplastic acrylic resin and 0.5-1 part of flatting agent. The magnesium alloy UV piano black paint for vehicles has the characteristics of high film forming property, high construction efficiency and high hardness.
Further, the initiator is a composite initiator and comprises 184 initiator and TPO initiator, wherein the mass ratio of the 184 initiator to the TPO initiator is 6:1.
further, the leveling agent is a composite leveling agent, and the composite leveling agent comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5.
Furthermore, the type of the modified epoxy acrylate resin is 2142, the type of the difunctional urethane acrylate resin is HP2000, the type of the hexafunctional urethane acrylate resin is 9010, the type of the polycarbon modified urethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%.
In the finish paint, the main components have the following functions:
184 initiator: and curing the middle layer surface layer.
TPO initiator: and (5) deep curing.
PM propylene glycol methyl ether: polarity of stronger dissolving power.
TMPTA trimethylolpropane triacrylate to provide fluidity for construction and cross-linking paint film.
TPGDA tripropylene glycol diacrylate provides construction flow properties and the paint film is crosslinked.
2142. Modified epoxy acrylate resin: provide fullness and gloss and reduce cost.
HP2000 difunctional urethane acrylate resin: and the toughness and the adhesive force of the UV paint film are provided.
9010 hexafunctional urethane acrylate resin: provide overall hardness of the paint film, provide scratch resistance, and dry out.
6205 polycarbonate modified polyurethane acrylate: the tenacity of the paint film is improved.
BR113 (30%) thermoplastic acrylic resin: the anti-sagging property of the gloss oil in the construction process is improved, the shrinkage of the cured paint film is reduced, and the damage to the primer and the intermediate paint due to excessive shrinkage in the UV paint film curing process is prevented.
Further, the preparation method of the finish paint comprises the following steps: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
Further, the finish paint also comprises a diluent, wherein the proportion of the diluent is 1. In the using process, the baking temperature is controlled to be preheated to 55 ℃ for 5min, and the energy is 800 mj/cm.
Further, the diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
In the invention, the primer is an epoxy curing system primer, which comprises the following components in parts by mass: 93 parts of semi-finished color paste, 5 parts of epoxy resin, 1.5 parts of butyl acetate and 0.5 part of 3700 acrylate leveling agent with 10 percent of solid content.
The epoxy curing system is adopted as the primer, has good wrapping property, has excellent adhesive force with magnesium alloy materials and surface paint, and has better adhesive force stability than a polyurethane system. The polyurethane systems of the prior art are left for a while after paint spraying, and the adhesion is unstable due to the post-reaction process, so that other aging resistance is also deteriorated.
In the primer, the functions of different components are as follows:
epoxy resin: the main resin has excellent performance stability and adhesive force.
3700 of acrylate-type leveling agent: has proper surface tension, stronger stain resistance and good recoatability.
The preparation method of the primer comprises the following steps: and (4) feeding materials in sequence, and detecting after dispersing and stirring for 20 minutes at 300 revolutions per minute.
Specifically, in the primer, the semi-finished color paste comprises the following components in parts by mass: 12 parts of butyl acetate, 5 parts of n-butanol, 2 parts of dispersant BYK163, 2 parts of Degussa No. 6 carbon powder, 35 parts of epoxy resin, 18.5 parts of 2000-mesh A90 talcum powder, 10.5 parts of barium sulfate, 10 parts of aluminum tripolyphosphate and 5 parts of zinc phosphate.
In the semi-finished color paste, different components are as follows:
a90 of talcum powder: the thickness is 2000 meshes, the filling property is good, and the unevenness of the bottom pit is overcome.
Barium sulfate: good filling property and is beneficial to grinding and dispersing carbon powder.
Aluminum tripolyphosphate: good filling property and is beneficial to grinding and dispersing carbon powder.
Zinc phosphate: good filling property and is beneficial to grinding and dispersing carbon powder.
The A90 talcum powder, the barium sulfate, the aluminum tripolyphosphate and the zinc phosphate have good filling property, can overcome the defect that a plurality of pits are formed in the surface of a magnesium alloy material after compression molding, and improve the smoothness of a paint film.
Aluminum tripolyphosphate, zinc phosphate: the paint has good affinity with the varnish, can be used together with various pigments and fillers, and can also be used together with various anti-rust pigments to improve the salt spray performance and the aging resistance of a paint film.
The preparation method of the semi-finished color paste comprises the following steps: sequentially adding butyl acetate, n-butyl alcohol and a dispersing agent, uniformly dispersing and stirring at 200 r/min, adding Desgassex 6# carbon powder and epoxy resin after 2 minutes, dispersing and stirring at 300 r/min for 5 minutes, adding barium sulfate, aluminum tripolyphosphate and zinc phosphate, dispersing and stirring at 500 r/min for 20 minutes, and grinding to 10 microns in fineness by a sand mill to obtain the semi-finished color paste.
In the finish paint, a curing agent is added according to actual needs, wherein the curing agent in the finish paint comprises the following components in parts by mass: 4118 is 25 parts, has strong adhesion and good powder wrapping property; 51 parts of butyl acetate and 24 parts of n-butanol.
The finish paint also relates to the use of a diluent in the using process, and the diluent is formed by mixing butyl acetate and n-butyl alcohol according to the proportion of 1. The dilution ratio is 4; the baking temperature is 75 ℃ to 80 ℃ for 40 minutes in the using process.
In the invention, the medium paint comprises the following components in parts by mass: 3451 hydroxyl acrylic resin with low hydroxyl value 45 parts, special modified resin 15 parts, drier T-12 0.05 part, E1011 extinction powder 3 parts, PU color paste 21 parts, butyl acetate 8.95 parts, butanone 6 parts, and LTW resin 1 part.
In the invention, a PU system with good construction performance, good drying performance and low hydroxyl value is selected as the intermediate coat. The preparation method comprises the following steps: the materials are fed according to the formula and are dispersedly stirred for 20 minutes at 500 revolutions per minute.
In the preparation process of the intermediate coat, a curing agent is added according to actual needs, and the curing agent of the intermediate coat is prepared by mixing N3390 and ethyl acetate according to the mass ratio of 1.
In the using process of the Chinese lacquer, a diluent is also needed, and the diluent is prepared by mixing the following components in parts by mass: 50 parts of butyl acetate, 5 parts of PMA, 10 parts of ketone, 20 parts of butanone and 15 parts of DAA. Dilution of
The ratio is 5; the baking temperature is 75-80 ℃ for 40 minutes.
Example 1
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 5 parts of initiator, 12.5 parts of ethyl acetate, 3 parts of propylene glycol methyl ether, 15 parts of trimethylolpropane triacrylate, 9 parts of tripropylene glycol diacrylate, 20 parts of modified epoxy acrylate resin, 12 parts of difunctional urethane acrylate resin, 17.5 parts of hexafunctional urethane acrylate resin, 6 parts of polycarbon modified urethane acrylate, 4 parts of thermoplastic acrylic resin and 0.75 part of leveling agent.
In this embodiment, the initiator is a composite initiator, and includes 184 initiator and TPO initiator, and the mass ratio of 184 initiator to TPO initiator is 6:1. the leveling agent is a composite leveling agent which comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5. The type of the modified epoxy acrylate resin is 2142, the type of the difunctional polyurethane acrylate resin is HP2000, the type of the hexafunctional polyurethane acrylate resin is 9010, the type of the polycarbon modified polyurethane acrylate resin is 6205, and the solid content of the thermoplastic acrylic resin is 30% of BR113.
In this embodiment, the preparation method of the top coat is as follows: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
In this example, the topcoat also included a diluent at a 1.3 diluent ratio with a dilution viscosity of 9.5 seconds. The diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts of the components.
In this example, the primer and the middle coat were prepared in the above-described proportions.
Example 2
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 4 parts of initiator, 10 parts of ethyl acetate, 8 parts of propylene glycol methyl ether, 12.5 parts of trimethylolpropane triacrylate, 8 parts of tripropylene glycol diacrylate, 30 parts of modified epoxy acrylate resin, 10 parts of difunctional urethane acrylate resin, 15 parts of hexafunctional urethane acrylate resin, 10 parts of polycarbon modified urethane acrylate, 3 parts of thermoplastic acrylic resin and 0.5 part of leveling agent.
In this embodiment, the initiator is a composite initiator, and includes 184 initiator and TPO initiator, and the mass ratio of 184 initiator to TPO initiator is 6:1. the leveling agent is a composite leveling agent which comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5. The type of the modified epoxy acrylate resin is 2142, the type of the difunctional urethane acrylate resin is HP2000, the type of the hexafunctional urethane acrylate resin is 9010, the type of the polycarbon modified urethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%.
In this embodiment, the preparation method of the top coat is as follows: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
In this example, the topcoat also included a diluent in a 1. The diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
In this example, the primer and the middle coat were prepared in the above-described proportions.
Example 3
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 3 parts of initiator, 15 parts of ethyl acetate, 5 parts of propylene glycol methyl ether, 10 parts of trimethylolpropane triacrylate, 10 parts of tripropylene glycol diacrylate, 25 parts of modified epoxy acrylate resin, 8 parts of difunctional urethane acrylate resin, 20 parts of hexa-functional urethane acrylate resin, 8 parts of polycarbomodified urethane acrylate, 23 parts of thermoplastic acrylic resin and 1 part of flatting agent.
In this embodiment, the initiator is a composite initiator, and includes 184 initiator and TPO initiator, and the mass ratio of 184 initiator to TPO initiator is 6:1. the leveling agent is a composite leveling agent which comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5. The type of the modified epoxy acrylate resin is 2142, the type of the difunctional urethane acrylate resin is HP2000, the type of the hexafunctional urethane acrylate resin is 9010, the type of the polycarbon modified urethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%.
In this embodiment, the preparation method of the top coat is as follows: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
In this example, the topcoat also included a diluent in a 1. The diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts of the components.
In this example, the primer and the middle coat were prepared in the above-described proportions.
Example 4
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 4 parts of initiator, 14 parts of ethyl acetate, 4 parts of propylene glycol methyl ether, 11 parts of trimethylolpropane triacrylate, 9 parts of tripropylene glycol diacrylate, 28 parts of modified epoxy acrylate resin, 9 parts of difunctional urethane acrylate resin, 16 parts of hexafunctional urethane acrylate resin, 7 parts of polycarbonate modified urethane acrylate, 6 parts of thermoplastic acrylic resin and 0.6 part of leveling agent.
In this embodiment, the initiator is a composite initiator, and includes 184 initiator and TPO initiator, and the mass ratio of 184 initiator to TPO initiator is 6:1. the leveling agent is a composite leveling agent which comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5. The type of the modified epoxy acrylate resin is 2142, the type of the difunctional polyurethane acrylate resin is HP2000, the type of the hexafunctional polyurethane acrylate resin is 9010, the type of the polycarbon modified polyurethane acrylate resin is 6205, and the solid content of the thermoplastic acrylic resin is 30% of BR113.
In this embodiment, the preparation method of the top coat is as follows: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
In this example, the topcoat also included a diluent in a 1. The diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
In this example, the primer and the middle coat were prepared in the above-described proportions.
Example 5
The invention discloses a vehicle-mounted magnesium alloy UV piano black paint which comprises a primer, a middle paint and a finish paint, wherein the finish paint comprises the following components in parts by mass: 3.5 parts of initiator, 11 parts of ethyl acetate, 5 parts of propylene glycol methyl ether, 10 parts of trimethylolpropane triacrylate, 8.7 parts of tripropylene glycol diacrylate, 25 parts of modified epoxy acrylate resin, 10 parts of difunctional urethane acrylate resin, 15 parts of hexafunctional urethane acrylate resin, 8 parts of polycarbon modified urethane acrylate, 3 parts of thermoplastic acrylic resin and 0.8 part of leveling agent.
In this embodiment, the initiator is a composite initiator, and includes 184 initiator and TPO initiator, and the mass ratio of 184 initiator to TPO initiator is 6:1. the leveling agent is a composite leveling agent which comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5. The type of the modified epoxy acrylate resin is 2142, the type of the difunctional urethane acrylate resin is HP2000, the type of the hexafunctional urethane acrylate resin is 9010, the type of the polycarbon modified urethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%.
In this embodiment, the preparation method of the top coat is as follows: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 r/min; TMPTA, TPGDA and BR113 (30%) are added and stirred for 10 minutes at 300 r/min, 2142, HP2000 and 6205 are added and stirred for 30 minutes at 300 r/min, and a 410 leveling agent and a BYK333 leveling agent are added and stirred for 10 minutes at 300 r/min.
In this example, the topcoat also included a diluent in a 1. The diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
In this example, the primer and the middle coat were prepared in the above-described proportions.
To evaluate the technical effect of the present invention, the following performance tests were performed on the products of examples 1 to 5:
1. appearance: the glossiness is more than 100-110 degrees, good leveling property and excellent fullness.
2. Adhesion force: taking 3 finished products or 3 samples of 150mm multiplied by 100mm, marking hundreds of grids according to ISO 2409 standard, rapidly pulling out by using adhesive tape, and ensuring that no grid on the surface of a paint film falls off, wherein the samples of examples 1-5 are all 0 grade.
3. Hardness (Chinese pencil/1 KG force) H-2H, no obvious scratch of the paint film in examples 1-5.
4. Friction resistance: the friction head is composed of a cylinder with the diameter of (16 +/-0.1) mm, pressure (9 +/-0.2) N is applied, and the linear reciprocating stroke is (104 +/-3) mm. Comparing the sample before and after: examples 1-5 all samples had a grey scale of no less than 4;
5. high and low temperature impact
3 finished products or 3 samples of 150mm × 100mm were taken and subjected to 20-cycle test under the following conditions of high and low temperature alternation. After the test, the appearance of the sample is checked to be not abnormal, and the adhesive force of the examples 1 to 5 is grade 1.
Description of the test procedure: standing at 23 deg.C and 30% humidity for 40min; humidity is 30%, temperature is from 23 deg.C to-35 deg.C, and time is 90min; keeping at 35X 30% for 60min, heating to 50 deg.C with humidity of 80%, and maintaining for 80min; keeping at 50 deg.C for 80% for 120min; heating to 80 deg.C with 30% humidity for 30min; keeping the temperature at 80 ℃ for 240 hours; cooling to 23 deg.C with 30% humidity for 60min. Is a cycle.
6. And (3) condensate water test: 3 finished products or 150mm multiplied by 100mm samples are taken and tested according to the constant humidity condensation test method specified by the standard ISO 6270-2, the temperature is 40 +/-3 ℃, and the test time is 240 hours. After the experiment is finished, the paint is placed at normal temperature for 30 minutes without bubbling and obvious change in appearance, and the adhesive force of the paint in examples 1 to 5 is grade 1.
7. Salt spray resistance: no red rust or white rust occurs after 96 hours, and the coatings of the examples 1 to 5 have no phenomena of foaming, falling off, cracking and the like.
8. Moisture resistance test: the paint films of the examples 1 to 5 have no 1-grade abnormal adhesion force such as cracking, whitening and the like after being heated at 90 ℃/96% for 72 hours.
9. Boiling resistance test: at 100 ℃ for 4 hours, the paint film has no appearance change, and the adhesive force of the examples 1 to 5 is grade 1. Ordinary 85 ℃ for 2 hours
10. Light resistance: 1.25w/m2 420mm temperature scale 100 ℃ 1500 hours, no change in color and no cracking in the paint films of examples 1-5, and adhesion of grade 1. Normally only 330 hours.
11. High-temperature thermal aging: the temperature of 105 ℃ is kept for 500 hours, the paint film of each of the films of examples 1-5 has no change, has no obvious color change and cracking phenomenon, and has the adhesive force of grade 1.
12. Construction property: examples 1 to 5 all had suitability for workability, suitability for leveling preheating condition and suitability for drying condition in the appearance of a paint film.
In the present invention, relatively speaking, the PU paint has a gloss of 90-95 ℃ and a hardness of HB-H, and is inferior in resistance to cosmetics, while the UV paint has a gloss of 100-110 and a hardness of H-2H, and is superior in resistance to cosmetics.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (6)
1. The vehicle-mounted magnesium alloy UV piano black paint comprises a primer, a middle paint and a finish paint, and is characterized in that:
the primer is an epoxy curing system primer, and the epoxy curing system primer comprises the following components in parts by mass: 93 parts of semi-finished color paste, 5 parts of epoxy resin, 1.5 parts of butyl acetate and 0.5 part of 3700 acrylate leveling agent with 10 percent of solid content;
the finish paint comprises the following components in parts by mass: 3-5 parts of initiator, 10-15 parts of ethyl acetate, 3-8 parts of propylene glycol methyl ether, 10-15 parts of trimethylolpropane triacrylate, 8-10 parts of tripropylene glycol diacrylate, 20-30 parts of modified epoxy acrylate resin, 8-12 parts of difunctional urethane acrylate resin, 15-20 parts of hexa-functional urethane acrylate resin, 6-10 parts of polycarbomodified urethane acrylate, 2-4 parts of thermoplastic acrylic resin and 0.5-1 part of flatting agent;
the initiator is a composite initiator and comprises 184 initiator and TPO initiator, wherein the mass ratio of the 184 initiator to the TPO initiator is 6:1; the type of the modified epoxy acrylate resin is 2142, the type of the difunctional polyurethane acrylate resin is HP2000, the type of the hexafunctional polyurethane acrylate resin is 9010, the type of the polycarbon modified polyurethane acrylate resin is 6205, and the thermoplastic acrylic resin is BR113 with the solid content of 30%;
the medium paint comprises the following components in parts by mass: 3451 hydroxyl acrylic resin with low hydroxyl value 45 parts, special modified resin 15 parts, drier T-12 0.05 part, E1011 extinction powder 3 parts, PU color paste 21 parts, butyl acetate 8.95 parts, butanone 6 parts, and LTW resin 1 part.
2. The vehicle-mounted magnesium alloy material UV piano black paint according to claim 1, is characterized in that: the leveling agent is a composite leveling agent, and the composite leveling agent comprises a 410 leveling agent and a BYK333 leveling agent in a mass ratio of 5.
3. The vehicle-mounted magnesium alloy material UV piano black paint according to claim 1, is characterized in that: the preparation method of the finish paint comprises the following steps: firstly, adding 184 initiator, TPO initiator, ethyl acetate and PM propylene glycol methyl ether into a stirrer, and dispersing and stirring for 10 minutes at 200 revolutions per minute; adding TMPTA, TPGDA and BR113, stirring for 300 r/min, dispersing and stirring for 10 minutes, adding 2142, HP2000 and 6205, dispersing and stirring for 30 minutes at 300 r/min, adding 410 leveling agent and BYK333, dispersing and stirring for 10 minutes at 300 r/min.
4. The vehicle-mounted magnesium alloy material UV piano black paint according to claim 1, is characterized in that: the finishing paint also comprises a diluent, wherein the proportion of the diluent is 1.
5. The vehicle-mounted magnesium alloy material UV piano black paint according to claim 4, is characterized in that: the diluent comprises the following components in parts by mass: 15 parts of butyl acetate, 50 parts of ethyl acetate and butanone: and 20 parts.
6. The vehicle-mounted magnesium alloy material UV piano black paint according to claim 1, is characterized in that: the semi-finished color paste comprises the following components in parts by mass: 12 parts of butyl acetate, 5 parts of n-butanol, 2 parts of dispersant BYK163, 2 parts of Degussa No. 6 carbon powder, 35 parts of epoxy resin, 18.5 parts of 2000-mesh A90 talcum powder, 10.5 parts of barium sulfate, 10 parts of aluminum tripolyphosphate and 5 parts of zinc phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111576674.2A CN114316749B (en) | 2021-12-22 | 2021-12-22 | Magnesium alloy UV piano black paint for vehicle |
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| CN101463220A (en) * | 2009-01-06 | 2009-06-24 | 深圳桑菲消费通信有限公司 | UV coating for spraying magnesium aluminum alloy surface |
| CN102964976A (en) * | 2012-11-21 | 2013-03-13 | 深圳市广田环保涂料有限公司 | Elastic polyurethane intermediate paint and preparation method and using method thereof |
| CN103351801B (en) * | 2013-06-07 | 2015-07-29 | 浙江佑谦特种材料有限公司 | A kind of coating with imitative porcelain effect for glass baseplate and coating method thereof |
| CN111909612B (en) * | 2020-07-01 | 2021-07-27 | 珠海格力电器股份有限公司 | High-adhesion UV gloss oil and preparation method and application thereof |
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