CN112759960A - Photocuring eye filling ash for automobile repairing and blade coating construction and preparation method thereof - Google Patents
Photocuring eye filling ash for automobile repairing and blade coating construction and preparation method thereof Download PDFInfo
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- CN112759960A CN112759960A CN202011578701.5A CN202011578701A CN112759960A CN 112759960 A CN112759960 A CN 112759960A CN 202011578701 A CN202011578701 A CN 202011578701A CN 112759960 A CN112759960 A CN 112759960A
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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Abstract
The invention discloses a light-cured eye filling ash for automobile repairing blade coating construction and a preparation method thereof, and the light-cured eye filling ash comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 2.5-3.5: 1; the component A consists of epoxy resin, a curing agent A, a photoinitiator, talcum powder and titanium dioxide; the component B consists of polyamine, curing agent B and talcum powder. The invention selects epoxy resin and polyamine as main components, the component A and the component B are mixed in the using process and coated on the surface of a vehicle body in a scraping way, and after the irradiation of an LED lamp, a photoinitiator is decomposed to generate free radicals to initiate vinyl pyrrolidone (or vinyl caprolactam) to generate free radical polymerization; meanwhile, the heat released by polymerization can promote the addition reaction of epoxy-polyamine, improve the flexibility and adhesive force of the cured paint film, have lower toxicity and lower sensitivity to moisture and carbon dioxide in the air, and improve the water resistance.
Description
Technical Field
The invention relates to the technical field of automobile repair paint, in particular to photocuring eye filling ash for automobile repair blade coating construction and a preparation method thereof.
Background
Compared with the construction method of directly scraping and coating the filling dust outside the paint booth, the construction method is simpler and quicker. However, the existing eye-filling dust is a single-component solvent type product, a cross-linked structure cannot be formed after film forming, the weather resistance is poor, and the later-stage paint film is easy to foam.
The commonly used dual curing technology is that an isocyanate curing agent is added into a photo-curing resin to be crosslinked with a hydroxy acrylic resin to achieve the purpose of curing, but in the automobile panel spraying process, water grinding process is needed to be adopted for polishing after finishing blade coating of filling hole dust, and water and isocyanate groups are easy to react to generate bubbles, so that the appearance is influenced due to the generation of the bubbles, the bubbles can cause the crack of the finish paint, further rainwater and dust enter and corrode an automobile body, and larger-area paint removal and automobile body corrosion can be caused if the finish paint is not timely treated, so that the invention of the second dry photo-curing filling hole dust for automobile repair blade coating and the preparation method thereof are particularly important.
Disclosure of Invention
The invention aims to provide light-cured eye filling ash for automobile repairing and blade coating construction and a preparation method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the light-cured eye filling ash for automobile repairing and blade coating construction comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 2.5-3.5: 1.
Furthermore, the component A comprises, by weight, 30-40% of epoxy resin, 10-20% of curing agent A, 2-4.5% of photoinitiator, 40-50% of talcum powder and 1-3% of titanium dioxide.
Furthermore, the component B comprises the following raw materials, by weight, 38% -45% of polyamine, 78% -25% of a curing agent B10%, and 40% -50% of talcum powder.
Further, the epoxy resin is one or two mixtures of epoxy resin with an epoxy value of 12 or an epoxy value of 20; the curing agent A is vinyl pyrrolidone; the photoinitiator is a mixture of 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethyl benzoyl) oxyphosphorus.
Further, the polyamine is a mixture of polyether amine and diethylenetriamine; the curing agent B is a mixture of vinyl pyrrolidone and vinyl caprolactam.
A preparation method of light-cured eye filling ash for automobile repairing and blade coating construction comprises the following steps;
(1) mixing epoxy resin, vinyl pyrrolidone and talcum powder, stirring, adding titanium dioxide, 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus, and stirring to obtain a component A;
(2) mixing polyether amine, vinyl pyrrolidone and talcum powder, stirring, adding diethylenetriamine and vinyl caprolactam after stirring uniformly, and stirring to obtain the component B.
A method for using the photo-curing eye-filling ash used for the scraping and coating construction of automobile repairing includes such steps as taking out component A and component B, uniformly mixing them on scraper, scraping them on substrate to fill up the sand hole, and irradiating by LED lamp for 3-20 seconds to complete curing and cross-linking.
Furthermore, the LED lamp has the use wavelength of 380-420nm and the power of 20-60W.
Compared with the prior art, the invention has the following beneficial effects: the common dual curing technology is to add isocyanate curing agent into the light-cured resin to crosslink with the hydroxyl acrylic resin to achieve the curing purpose, but in the automobile panel spraying process, the water milling process is needed to polish after the hole filling ash is scraped, the reaction of the moisture and the isocyanate group is easy to generate bubbles, the generation of the bubbles not only affects the appearance, but also the bubbles can cause the cracking of the finish paint, so that rainwater and dust enter the finish paint to corrode a vehicle body, if the treatment is not carried out timely, the paint stripping and the vehicle body corrosion of a larger area can be caused, so in order to solve the problem that the moisture and isocyanate groups react to generate air bubbles, the epoxy resin and the polyamine are selected to be used for replacing the isocyanate, in the using process, the component A and the component B are mixed and coated on the surface of a vehicle body in a blade mode, and after the vehicle body is irradiated by an LED lamp, the photoinitiator is decomposed to generate free radicals, and vinyl pyrrolidone (or vinyl caprolactam) is initiated to carry out free radical polymerization; meanwhile, the heat released by polymerization can promote the combination of hydrogen atoms on the nitrogen atoms of the polyether amine and the primary diethylenetriamine amine with epoxy groups of the epoxy resin to be converted into secondary amine, and then the secondary amine is combined with another epoxy group to generate stable tertiary amine, and finally the stable epoxy-polyamine adduct is formed.
The acrylate compound has alpha and beta-unsaturated ketone structures, and the monomer can generate Michael addition reaction under the condition of the existence of the polyamine compound, so that the carbon-carbon double bond structure of the acrylate compound is damaged, and the photocuring effect is lost.
The LED lamp has the advantages of long service life, low energy consumption and low use cost compared with the high-pressure mercury lamp. The use wavelength of the LED lamp is required to be controlled to be 380-420nm in the use process, and the lowest power is 20W, so that the necessary illumination intensity is required to be provided for the free polymerization of the vinyl pyrrolidone and the vinyl caprolactam, and the proportion of 2.5-3.5:1 is required to be adjusted in the use process, so that the polyamine can be completely reacted, the curing efficiency is improved, and the adsorption capacity is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The light-cured eye filling ash for automobile repairing and blade coating construction comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 2.5: 1.
The component A comprises the following raw materials, by weight, 35% of epoxy resin, 20% of curing agent A, 4% of photoinitiator, 40% of talcum powder and 1% of titanium dioxide.
The component B comprises the following raw materials, by weight, 40% of polyamine, 20% of curing agent B and 40% of talcum powder.
The epoxy resin is epoxy resin with an epoxy value of 12; the curing agent A is vinyl pyrrolidone; the photoinitiator is a mixture of 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethyl benzoyl) oxyphosphorus.
The polyamine is a mixture of polyether amine and diethylenetriamine; the curing agent B is a mixture of vinyl pyrrolidone and vinyl caprolactam.
A preparation method of light-cured eye filling ash for automobile repairing and blade coating construction comprises the following steps;
(1) mixing epoxy resin, vinyl pyrrolidone and talcum powder, stirring, adding titanium dioxide, 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus, and stirring to obtain a component A;
(2) mixing polyether amine, vinyl pyrrolidone and talcum powder, stirring, adding diethylenetriamine and vinyl caprolactam after stirring uniformly, and stirring to obtain the component B.
Example 2
The light-cured eye filling ash for automobile repairing and blade coating construction comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 3.0: 1.
The component A comprises the following raw materials, by weight, 30% of epoxy resin, 20% of curing agent A, 3.0% of photoinitiator, 45% of talcum powder and 2% of titanium dioxide.
The component B comprises 45% of polyamine, 20% of curing agent B and 45% of talcum powder according to weight percentage.
The epoxy resin is epoxy resin with an epoxy value of 20; the curing agent A is vinyl pyrrolidone; the photoinitiator is a mixture of 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethyl benzoyl) oxyphosphorus.
The polyamine is a mixture of polyether amine and diethylenetriamine; the curing agent B is a mixture of vinyl pyrrolidone and vinyl caprolactam.
A light-cured eye filling ash for automobile repairing and blade coating construction comprises the following steps;
(1) mixing epoxy resin, vinyl pyrrolidone and talcum powder, stirring, adding titanium dioxide, 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus, and stirring to obtain a component A;
(2) mixing polyether amine, vinyl pyrrolidone and talcum powder, stirring, adding diethylenetriamine and vinyl caprolactam after stirring uniformly, and stirring to obtain the component B.
Example 3
The light-cured eye filling ash for automobile repairing and blade coating construction comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 3.5: 1.
The component A comprises the following raw materials, by weight, 40% of epoxy resin, 15% of curing agent A, 2% of photoinitiator, 40% of talcum powder and 3% of titanium dioxide.
The component B comprises 40% of polyamine, 10% of curing agent B and 50% of talcum powder according to weight percentage.
The epoxy resin is a mixture of two epoxy resins with the epoxy value of 12 and the epoxy value of 20; the curing agent A is vinyl pyrrolidone; the photoinitiator is a mixture of 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethyl benzoyl) oxyphosphorus.
The polyamine is a mixture of polyether amine and diethylenetriamine; the curing agent B is a mixture of vinyl pyrrolidone and vinyl caprolactam.
A light-cured eye filling ash for automobile repairing and blade coating construction comprises the following steps;
(1) mixing epoxy resin, vinyl pyrrolidone and talcum powder, stirring, adding titanium dioxide, 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus, and stirring to obtain a component A;
(2) mixing polyether amine, vinyl pyrrolidone and talcum powder, stirring, adding diethylenetriamine and vinyl caprolactam after stirring uniformly, and stirring to obtain the component B.
Example 4
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 1, uniformly mixing the components on a scraper according to the mass ratio of 2.5:1, knife coating the components on a base material to fill and level up sand holes, and irradiating the base material for 3 seconds by using an LED lamp with the wavelength of 380nm and the power of 60W to complete curing and crosslinking.
Example 5
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 2, uniformly mixing the components on a scraper according to the mass ratio of 3.0:1, knife coating the components on a base material to fill and level up sand holes, and irradiating the base material for 12 seconds by using an LED lamp with the wavelength of 400nm and the power of 50W to complete curing and crosslinking.
Example 6
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 3, uniformly mixing the components on a scraper according to the mass ratio of 3.5:1, knife coating the components on a base material to fill and level up sand holes, and irradiating the base material for 20 seconds by using an LED lamp with the wavelength of 420nm and the lowest power of 20W to finish curing and crosslinking.
Comparative example 1
20 percent of HDI tripolymer which is a common isocyanate curing agent in the market, 20 percent of epoxy acrylate containing hydroxyl, 17 percent of vinyl pyrrolidone, 40 percent of talcum powder and 3 percent of diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus are used, and after being uniformly mixed, the mixture is coated on a base material in a scraping way and is irradiated for 10 seconds by using an LED lamp with the wavelength of 380nm and the power of 60W, so that the curing and crosslinking can be completed.
Comparative example 2
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 3, uniformly mixing the components on a scraper according to the mass ratio of 1:1, knife coating the components on a base material to fill and level up sand holes, and irradiating the base material for 20 seconds by using an LED lamp with the wavelength of 420nm and the lowest power of 20W to complete curing and crosslinking.
Comparative example 3
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 3, uniformly mixing the components on a scraper according to the mass ratio of 3.5:1, knife coating the components on a base material to fill and level up sand holes, and irradiating the base material for 20 seconds by using an LED lamp with the wavelength of 365nm and the lowest power of 10W to finish curing and crosslinking.
Comparative example 4
A method for using photocuring filling-hole ash for automobile repairing and knife coating construction includes the steps of taking out the component A and the component B obtained in example 3, uniformly mixing the components on a scraper according to the mass ratio of 3.5:1, knife coating the components on a substrate to fill and level up sand holes, and irradiating the substrate for 20 seconds by using a high-pressure mercury lamp to complete curing and crosslinking.
Experiment of
Taking example 6 as an example, comparative example 1, comparative example 2, comparative example 3 and comparative example 4 were set up, and a control experiment was carried out, wherein the isocyanate curing agent and the hydroxyl group-containing epoxy acrylate resin were used in combination in comparative example 1, the mixing ratio in use in comparative example 2 was 1:1, the wavelength was 365nm and the power was 10W when the searchlighting was carried out using an LED lamp in comparative example 3, and the high-pressure mercury lamp was used in the illumination in comparative example 4.
The comparative examples 4, 5, 6, 1, 2, 3, 4 were subjected to comparative experiments, adhesion was measured by GB/T9286-1998, water resistance was measured by GB/T13493-1992, and the results were as follows,
watch 1
Note: the appearance evaluation grade is 1-5 grade, and 5 grade is smooth, flat, glossy and free of bubbles; grade 1 is a severe loss of gloss or blistering. The adhesion rating is classified into 1-5, the 5 is the best, and the 1 is the worst.
The comparative examples 4, 5, 6, 1, 2, 3, 4 were subjected to comparative experiments, heat resistance tests were carried out using GB/T1735-1979 at 80 ℃ for 72h of baking, VOC tests were carried out using GB24409-2020 and GB/T34675-2017 requirements, immersion was carried out using GB/T13493-1992 for 7h of alkali resistance tests, the test results were as follows,
| experimental group | Heat resistance | Alkali resistance | VOC(g/L) |
| Example 4 | 5 | 5 | 1 |
| Example 5 | 5 | 5 | 0 |
| Example 6 | 5 | 5 | 3 |
| Comparative example 1 | 3 | 3 | 76 |
| Comparative example 2 | 4 | 3 | 53 |
| Comparative example 3 | 3 | 3 | 52 |
| Comparative example 4 | 5 | 5 | 0 |
Watch two
Note: the appearance evaluation grade is 1-5 grade, 5 grade is no foaming, no crack, no wrinkle and slight color change; grade 1 is severe blistering, cracking, wrinkling, and discoloration.
The reason why the substrate of comparative example 1 was soaked in water for 30min, the appearance rating was 1, the adhesion rating was 1, and the heat resistance, alkali resistance, and VOC were inferior to those of examples 4, 5, and 6, is that in comparative example 1, a combination of an isocyanate curing agent and a hydroxyl group-containing epoxy acrylate resin was used, isocyanate reacted with water during water milling, bubbles were generated, and the generation of bubbles decreased the adhesion of the product, thereby decreasing the heat resistance and alkali resistance.
The base material of comparative example 2 was soaked in water for 30min and then had an appearance grade of 2 and an adhesion grade of 2, because in comparative example 2, the mixing ratio was 1:1 in use, the polyamine did not react completely, and the curing efficiency and the adsorption capacity were reduced.
The base material of comparative example 3 was soaked in water for 30min and had an appearance grade of 2 and an adhesion grade of 1, because the LED lamp used in comparative example 3 was operated at 365nm with 10W power, the LED power was too low, and the free polymerization reaction of vinylpyrrolidone and vinylcaprolactam was insufficient.
Each item of data of comparative example 4 is not much different from those of examples 4, 5 and 6, and the difference is that a high-pressure mercury lamp is used, the application can achieve the same effect as the high-pressure mercury lamp by using the LED lamp for illumination, and the energy consumption of the high-pressure mercury lamp is higher than that of the LED lamp, so that the use of the LED lamp is very economical and environment-friendly.
The VOC values of example 4, example 5, and example 6 were lower than those of the other comparative examples because the product was a solventless coating without volatile organic solvents, and was more environmentally friendly than the conventional high VOC coatings such as midcoat primer and putty.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a photocuring fills out eye ash for automobile repair blade coating construction which characterized in that: the second-drying type light-cured eye filling ash comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 2.5-3.5: 1.
2. The light-cured eye-filling ash for automobile repair scrape coating construction according to claim 1, wherein the light-cured eye-filling ash comprises the following components in percentage by weight: the component A comprises, by weight, 30-40% of epoxy resin, 10-20% of curing agent A, 2-4.5% of photoinitiator, 40-50% of talcum powder and 1-3% of titanium dioxide.
3. The light-cured eye-filling ash for automobile repair scrape coating construction according to claim 1, wherein the light-cured eye-filling ash comprises the following components in percentage by weight: the component B comprises the following raw materials, by weight, 38% -45% of polyamine, 10% -25% of curing agent B and 40% -50% of talcum powder.
4. The light-cured eye-filling ash for automobile repair scrape coating construction according to claim 2, wherein the light-cured eye-filling ash comprises the following components in percentage by weight: the epoxy resin is one or two mixtures of epoxy resin with an epoxy value of 12 or an epoxy value of 20; the curing agent A is vinyl pyrrolidone; the photoinitiator is a mixture of 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethyl benzoyl) oxyphosphorus.
5. The light-cured eye-filling ash for automobile repair scrape coating construction according to claim 3, wherein the light-cured eye-filling ash comprises the following components in percentage by weight: the polyamine is a mixture of polyether amine and diethylenetriamine; the curing agent B is a mixture of vinyl pyrrolidone and vinyl caprolactam.
6. A preparation method of light-cured eye filling ash for automobile repairing and blade coating construction is characterized by comprising the following steps: the method comprises the following steps of;
(1) mixing epoxy resin, vinyl pyrrolidone and talcum powder, stirring, adding titanium dioxide, 2-hydroxy-2-methyl-1-phenyl acetone and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus, and stirring to obtain a component A;
(2) mixing polyether amine, vinyl pyrrolidone and talcum powder, stirring, adding diethylenetriamine and vinyl caprolactam after stirring uniformly, and stirring to obtain the component B.
7. The use method of the light-cured eye filling ash for automobile repairing and blade coating construction is characterized by comprising the following steps of: when the curing and crosslinking agent is used, the component A and the component B are taken out, uniformly mixed on a scraper, coated on a base material to fill and level up the sand holes, and irradiated by an LED lamp for 3-20 seconds, so that curing and crosslinking can be completed.
8. The use method of the light-cured eye-filling ash for automobile repair scrape coating construction according to claim 7 is characterized in that: the LED lamp has the use wavelength of 380-420nm and the power of 20-60W.
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| CN202011578701.5A CN112759960A (en) | 2020-12-28 | 2020-12-28 | Photocuring eye filling ash for automobile repairing and blade coating construction and preparation method thereof |
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| CN110172266A (en) * | 2019-05-22 | 2019-08-27 | 上海华染涂料科技有限公司 | A kind of good high-strength conductive poly-putty base of temperature tolerance and its preparation method and application |
| CN110804334A (en) * | 2019-11-29 | 2020-02-18 | 德汇新材料科技南通有限公司 | Quick-drying putty for automobile beauty treatment, preparation method and application |
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2020
- 2020-12-28 CN CN202011578701.5A patent/CN112759960A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060205836A1 (en) * | 2005-03-09 | 2006-09-14 | Shamray Tracy A | Radiation curable putty compositions and methods for refinishing a substrate using such compositions |
| CN105377937A (en) * | 2013-07-18 | 2016-03-02 | 喜利得股份公司 | Use of an epoxide amine-based multicomponent mortar composition |
| CN110172266A (en) * | 2019-05-22 | 2019-08-27 | 上海华染涂料科技有限公司 | A kind of good high-strength conductive poly-putty base of temperature tolerance and its preparation method and application |
| CN110804334A (en) * | 2019-11-29 | 2020-02-18 | 德汇新材料科技南通有限公司 | Quick-drying putty for automobile beauty treatment, preparation method and application |
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