CN103980800A - Baking varnish as well as preparation method and application method thereof - Google Patents
Baking varnish as well as preparation method and application method thereof Download PDFInfo
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- CN103980800A CN103980800A CN201410244818.8A CN201410244818A CN103980800A CN 103980800 A CN103980800 A CN 103980800A CN 201410244818 A CN201410244818 A CN 201410244818A CN 103980800 A CN103980800 A CN 103980800A
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Abstract
The invention relates to the filed of coating and in particular relates to baking varnish as well as a preparation method and an application method thereof. The baking varnish is prepared from the following raw material components in parts by mass: 50-70 parts of water-borne epoxy resin, 5-10 parts of water-borne amino resin, 10-20 parts of deionized water, 0.1-1 part of dispersing agent, 3-8 parts of carbon black, 3-8 parts of salt mist resistant agent, 0.2-0.5 part of defoaming agent and 0.3-1 part of leveling agent. Compared with the baking varnish in the prior art, the baking varnish as well as a preparation method and an application method thereof, provided by the invention, have the advantages that deionized water is adopted as diluent, and water-borne epoxy resin and amino resin are adopted as raw materials, so that the problem that an organic solvent is discharged can be solved, harm to the environment is reduced, national environmental protection and energy saving industrial policy requirements can be met, and the baking varnish is environmental-friendly coating.
Description
Technical field
The present invention relates to paint field, in particular to a kind of baking vanish and preparation method thereof, using method.
Background technology
Nowadays coating industry is flourish, also more and more higher to environmental protection requirement, avoids the discharge of organic solvent, not only reduces the pollution to environment, has also guaranteed the healthy and safe of operator, and how inventing environment-friendly type coating is the main research direction in this area.
At present, it is raw material that coating generally adopts organic solvent, and this coating not only can cause a large amount of organic solvent emission to pollute, and also can endanger operator's health, for environmental security has been buried major hidden danger.
Summary of the invention
The object of the present invention is to provide a kind of baking vanish and preparation method thereof, using method, to solve the above problems.
A kind of baking vanish is provided in an embodiment of the present invention, its starting material comprise following component according to the mass fraction: aqueous epoxy resins 50-70 part, water-compatible amino resin 5-10 part, deionized water 10-20 part, dispersion agent 0.1-1 part, carbon black 3-8 part, salt spray resistance agent 3-8 part, defoamer 0.2-0.5 part, flow agent 0.3-1 part.
A kind of baking vanish that the embodiment of the present invention provides, there is baking vanish of the prior art to compare, it adopts deionized water as thinner, raw material adopts epoxy resin and the aminoresin of water-based, greatly reduce like this emission problem of organic solvent, reduce the harm to environment, met the energy-conservation industry policy requirement of national environmental protection, belonged to environmental type coating.
Preferably, described starting material comprise following component according to the mass fraction: aqueous epoxy resins 50-60 part, water-compatible amino resin 5-7 part, deionized water 10-15 part, dispersion agent 0.1-0.3 part, carbon black 3-4 part, salt spray resistance agent 3-5 part, defoamer 0.2-0.3 part, flow agent 0.3-0.5 part.
Baking vanish in the embodiment of the present invention not only adopts aqueous epoxy resins to reach not only environmental protection but also cost-effective object as starting material, and to adopt deionized water be solvent, and human body, without any injury, is reduced to generation and the environmental protection of fire.
Preferably, carbon black is preferably ground to granularity and is less than or equal to 30 μ m, carbon black can have influence on the levelling property of product, smooth performance and the impact on the antiseptic property of workpiece that it whitewashes as the size of important its granularity of starting material, therefore the size of its granularity has strict restriction, if the particle of carbon black is crossed conference and is made the planeness degradation of product after being applied on workpiece, can easy airborne dust when stirring starting material and more easily find particle agglomeration phenomenon if the particle of carbon black is too small.
Preferably, described flow agent is one or more in polydimethylsiloxane, poly-methyl alkyl siloxane and organic modified polyorganosiloxane, by add these several flow agents can make zinc-plated paint in workpiece surface drying process, form one smooth, smooth, film uniformly.
Preferably, described dispersion agent is one or more in Sodium hexametaphosphate 99, sodium polyphosphate and Potassium tripolyphosphate, by adding these several dispersion agents effectively to prevent raw material particle aggregation when mixing, improved raw-material uniformity consistency, also improved the thermostability of product, improved the levelling property of product simultaneously.
Preferably, described salt spray resistance agent is one or both in modified phosphate fat and silane coupling agent, and by adding these several salt spray resistance agent can make the corrosion resistance nature of baking vanish, oxidation resistance significantly promote, better protection scribbles the workpiece of paint vehicle.
Preferably, the pH value of described baking vanish is at 7-8, and granularity is 75-120 μ m, and temperature is that at 25 ℃, to detect its viscosity be 100-150KU.
Preferably, the pH value of described baking vanish is at 7.5-8, granularity is 75-100 μ m, temperature is that at 25 ℃, to detect its viscosity be 100-120KU, in order to guarantee the not perishable and depainting phenomenon of baking vanish life-time service, pH value is preferably weakly alkaline, in addition granularity and viscosity also will be within suitable scope guarantee paint vehicle use long-lasting.
The embodiment of the present invention also provides a kind of preparation method of baking vanish, comprises the steps:
(A) deionized water, salt spray resistance agent, dispersion agent and carbon black being sequentially added into rear mix and blend, is 40-60 ℃ in temperature, and rotating speed is to stir 30-50min under 800-1000rad/min;
(B) aqueous epoxy resins, water-compatible amino resin being added successively in the mixture after above-mentioned steps stirs, is 60-70 ℃ in temperature, and rotating speed is to stir 40-60min under 400-500rad/min;
(C) defoamer, flow agent being added successively in the mixture after above-mentioned steps stirs, is 70-80 ℃ in temperature, and rotating speed is under 300-400rad/min, to stir 10-20min to obtain slurry;
(D) will after described slurry grinding, filtration residue, obtain baking vanish.
The preparation method of a kind of baking vanish that the embodiment of the present invention provides, compare with the preparation method of baking vanish of the prior art, it adopts deionized water as thinner, raw material adopts epoxy resin and the aminoresin of water-based, greatly reduce like this emission problem of organic solvent, reduced the harm to environment, met the energy-conservation industry policy requirement of national environmental protection, the baking vanish of preparing belongs to environmental type coating.
Each step of the embodiment of the present invention all has strict restriction to the stirring velocity of raw material, churning time and whipping temp, the smooth slickness that keeps finished product for raw material is mixed more fully, and too high or too low each starting material that all can not make of stirring velocity, churning time and whipping temp well interpenetrate synergy to produce comprehensive effect, the multiple performances such as the product sophistication that makes to prepare, slickness energy reach optimum.
The embodiment of the present invention also provides a kind of using method of baking vanish, comprises the steps:
(A) workpiece is carried out to pre-treatment: oil removing is rinsed with clear water after soaking 20-30min after drying in hydrochloric acid;
(B) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 5-10min, and the mass ratio of film agent and water is 1:3-5;
(C) the workpiece airing after previous step processing after forming cured film, workpiece surface is sprayed to described baking vanish;
(D) by spraying, the workpiece after baking vanish is placed under the environment of 70-80 ℃ after roasting 60-80min, obtains finished product.
Preferably, in described step (A), it is a kind of in ethanol or toluene that workpiece is carried out to pre-treatment degreaser used.
The baking vanish using method that the embodiment of the present invention provides, is chosen under low temperature 70-80 ℃ condition and toasts, than toasted under the condition of 150 ℃ of left and right of high temperature in the past, both saved the energy and this baking vanish wear resisting property is good, water-fast humidity resistance is good, smooth surface, and beautiful decoration is generous.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
Preparation method and the using method of baking vanish are as follows:
(A) deionized water 10kg, modified phosphate fat 3kg, Sodium hexametaphosphate 99 1kg and carbon black 3kg being sequentially added into rear mix and blend, is 40 ℃ in temperature, and rotating speed is to stir 50min under 1000rad/min;
(B) aqueous epoxy resins 50kg, water-compatible amino resin 5kg being added successively in the mixture after above-mentioned steps stirs, is 60 ℃ in temperature, and rotating speed is to stir 60min under 500rad/min;
(C) defoamer 200g, polydimethylsiloxane 300g being added successively in the mixture after above-mentioned steps stirs, is 80 ℃ in temperature, and rotating speed is under 300rad/min, to stir 10min to obtain slurry;
(D) after slurry grinding above-mentioned steps being obtained, filtration residue, obtain baking vanish; The baking vanish design parameter obtaining is as follows: pH value is 8.5, and granularity is 75 μ m, and temperature is that at 25 ℃, with stormer viscosity meter, to detect its viscosity be 170KU.
(E) workpiece is carried out to pre-treatment: with ethanol, carry out after oil removing is soaked 20min after drying in hydrochloric acid rinsing with clear water;
(F) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 5min, and the mass ratio of film agent and water is 1:3;
(G) the workpiece airing after previous step processing is sprayed to the baking vanish that (D) step obtains to workpiece surface formation cured film;
(H) by spraying, the workpiece after baking vanish is placed under the environment of 70 ℃ after roasting 60min, obtains finished product.
Embodiment 2
Preparation method and the using method of baking vanish are as follows:
(A) by the mixture 100g of deionized water 20kg, silane coupling agent 8kg, Sodium hexametaphosphate 99 and sodium polyphosphate and granularity, be that the carbon black 8kg of 20 μ m is sequentially added into rear mix and blend, in temperature, be 60 ℃, rotating speed is to stir 30min under 800rad/min;
(B) aqueous epoxy resins 70kg, water-compatible amino resin 10kg being added successively in the mixture after above-mentioned steps stirs, is 70 ℃ in temperature, and rotating speed is to stir 40min under 400rad/min;
(C) the mixture 1kg of defoamer 500g, poly-methyl alkyl siloxane and organic modified polyorganosiloxane being added in the mixture after above-mentioned steps stirs successively, is 80 ℃ in temperature, and rotating speed is under 400rad/min, to stir 20min to obtain slurry;
(D) after slurry grinding above-mentioned steps being obtained, filtration residue, obtain baking vanish; The baking vanish design parameter obtaining is as follows: pH value is 8, and granularity is 120 μ m, and temperature is that at 25 ℃, with stormer viscosity meter, to detect its viscosity be 150KU.
(E) workpiece is carried out to pre-treatment: with toluene, carry out after oil removing is soaked 30min after drying in hydrochloric acid rinsing with clear water;
(F) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 10min, and the mass ratio of film agent and water is 1:5;
(G) the workpiece airing after previous step processing is sprayed to the baking vanish that (D) step obtains to workpiece surface formation cured film;
(H) by spraying, the workpiece after baking vanish is placed under the environment of 80 ℃ after roasting 80min, obtains finished product.
Embodiment 3
Preparation method and the using method of baking vanish are as follows:
(A) by the mixture 5kg of deionized water 15kg, modified phosphate fat and silane coupling agent, Potassium tripolyphosphate 300g and granularity, being that 30 μ m carbon black 4kg are sequentially added into rear mix and blend, is 60 ℃ in temperature, and rotating speed is to stir 40min under 900rad/min;
(B) aqueous epoxy resins 60kg, water-compatible amino resin 7kg being added successively in the mixture after above-mentioned steps stirs, is 65 ℃ in temperature, and rotating speed is to stir 50min under 450rad/min;
(C) defoamer 300g, poly-methyl alkyl siloxane 500g being added in the mixture after above-mentioned steps stirs successively, is 80 ℃ in temperature, and rotating speed is under 350rad/min, to stir 15min to obtain slurry;
(D) after slurry grinding above-mentioned steps being obtained, filtration residue, obtain baking vanish; The baking vanish design parameter obtaining is as follows: pH value is 7.5, and granularity is 100 μ m, and temperature is that at 25 ℃, with stormer viscosity meter, to detect its viscosity be 120KU.
(E) workpiece is carried out to pre-treatment: with ethanol, carry out after oil removing is soaked 20min after drying in hydrochloric acid rinsing with clear water;
(F) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 5min, and the mass ratio of film agent and water is 1:4;
(G) the workpiece airing after previous step processing is sprayed to the baking vanish that (D) step obtains to workpiece surface formation cured film;
(H) by spraying, the workpiece after baking vanish is placed under the environment of 75 ℃ after roasting 60min, obtains finished product.
Embodiment 4
Preparation method and the using method of baking vanish are as follows:
(A) the carbon black 5kg that is 25 μ m by deionized water 12kg, modified phosphate fat 4kg, sodium polyphosphate 500g and granularity is sequentially added into rear mix and blend, in temperature, is 60 ℃, and rotating speed is to stir 35min under 1000rad/min;
(B) aqueous epoxy resins 50kg, water-compatible amino resin 5kg being added successively in the mixture after above-mentioned steps stirs, is 65 ℃ in temperature, and rotating speed is to stir 60min under 450rad/min;
(C) defoamer 200g, polydimethylsiloxane 300g being added successively in the mixture after above-mentioned steps stirs, is 80 ℃ in temperature, and rotating speed is under 400rad/min, to stir 20min to obtain slurry;
(D) after slurry grinding above-mentioned steps being obtained, filtration residue, obtain baking vanish; The baking vanish design parameter obtaining is as follows: pH value is 7.5, and granularity is 80 μ m, and temperature is that at 25 ℃, with stormer viscosity meter, to detect its viscosity be 120KU.
(E) workpiece is carried out to pre-treatment: with toluene, carry out after oil removing is soaked 25min after drying in hydrochloric acid rinsing with clear water;
(F) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 8min, and the mass ratio of film agent and water is 1:5;
(G) the workpiece airing after previous step processing is sprayed to the baking vanish that (D) step obtains to workpiece surface formation cured film;
(H) by spraying, the workpiece after baking vanish is placed under the environment of 70 ℃ after roasting 80min, obtains finished product.
Experimental example 1
The performance of the baking vanish that test embodiment of the present invention 1-4 prepares, specific performance index is as following table 1:
The Performance Ratio of table 1 baking vanish
| ? | Pencil hardness | VOC content | Salt fog resistance | Fineness (μ m) |
| Embodiment 1 | 2H | 0 | 1 grade | 15 |
| Embodiment 2 | 3H | 0.5mg/L | 1 grade | 10 |
| Embodiment 3 | 2H | 0.1mg/L | 1 grade | 18 |
| Embodiment 4 | 2H | 0 | 1 grade | 20 |
As can be seen from the table, the baking vanish that the embodiment of the present invention is prepared is realized zero VOC content substantially, and environmental protection is containing organic solvent, and intensity and erosion resistance have also reached national standard.
Experimental example 2
Select the square plank of 50cm*50cm of five same sizes as workpiece, the baking vanish of preparing by the embodiment of the present invention 1 is processed workpiece respectively according to the baking finish process of the embodiment 1 in the baking finish process of embodiment 1-4 (E)-(H) step and patent that application number is 201210153589.X, wherein use embodiment 1-4 baking finish process be respectively first group, second group, the 3rd group, the 4th group, enforcement in the patent that request for utilization number is 201210153589.X 1 baking finish process tests is the 5th group, five situations that finished product is observed its paint film that obtain after baking vanish, concrete outcome sees the following form 2:
The paint film property comparison of table 2 baking vanish finished product
As can be seen from Table 2, in the situation that the baking vanish that baking vanish all selects the embodiment of the present invention 1 preparation method to prepare, the baking finish process difference that workpiece is processed is still very large on final finished product impact, the low temperature baking finish process that adopts the embodiment of the present invention not only energy-saving and cost-reducing but also paint film planeness and hardness all higher, and processing after workpiece surface smooth do not have concavo-convex and hole place, very attractive in appearance, the high temperature baking finish process of contrary employing prior art, not only hardness is not high but also surperficial next degree is higher for workpiece after processing, there will be a lot of concavo-convex local and hole points.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a baking vanish, it is characterized in that, its starting material comprise following component according to the mass fraction: aqueous epoxy resins 50-70 part, water-compatible amino resin 5-10 part, deionized water 10-20 part, dispersion agent 0.1-1 part, carbon black 3-8 part, salt spray resistance agent 3-8 part, defoamer 0.2-0.5 part, flow agent 0.3-1 part.
2. a kind of baking vanish according to claim 1, it is characterized in that, described starting material comprise following component according to the mass fraction: aqueous epoxy resins 50-60 part, water-compatible amino resin 5-7 part, deionized water 10-15 part, dispersion agent 0.1-0.3 part, carbon black 3-4 part, salt spray resistance agent 3-5 part, defoamer 0.2-0.3 part, flow agent 0.3-0.5 part.
3. a kind of baking vanish according to claim 1, is characterized in that, described flow agent is one or more in polydimethylsiloxane, poly-methyl alkyl siloxane and organic modified polyorganosiloxane.
4. a kind of baking vanish according to claim 1, is characterized in that, described dispersion agent is one or more in Sodium hexametaphosphate 99, sodium polyphosphate and Potassium tripolyphosphate.
5. a kind of baking vanish according to claim 1, is characterized in that, described salt spray resistance agent is one or both in modified phosphate fat and silane coupling agent.
6. a kind of baking vanish according to claim 1, is characterized in that, the pH value of described baking vanish is at 7-8, and granularity is 75-120 μ m, and temperature is that at 25 ℃, to detect its viscosity be 100-150KU.
7. a kind of baking vanish according to claim 1, is characterized in that, the pH value of described baking vanish is at 7.5-8, and granularity is 75-100 μ m, and temperature is that at 25 ℃, to detect its viscosity be 100-120KU.
8. the preparation method of a kind of baking vanish as described in claim 1-7 any one, is characterized in that, comprises the steps:
(A) deionized water, salt spray resistance agent, dispersion agent and carbon black being sequentially added into rear mix and blend, is 40-60 ℃ in temperature, and rotating speed is to stir 30-50min under 800-1000rad/min;
(B) aqueous epoxy resins, water-compatible amino resin being added successively in the mixture after above-mentioned steps stirs, is 60-70 ℃ in temperature, and rotating speed is to stir 40-60min under 400-500rad/min;
(C) defoamer, flow agent being added successively in the mixture after above-mentioned steps stirs, is 70-80 ℃ in temperature, and rotating speed is under 300-400rad/min, to stir 10-20min to obtain slurry;
(D) will after described slurry grinding, filtration residue, obtain baking vanish.
9. the using method of a kind of baking vanish as described in claim 1-7 any one, is characterized in that, comprises the steps:
(A) workpiece is carried out to pre-treatment: oil removing is rinsed with clear water after soaking 20-30min after drying in hydrochloric acid;
(B) mixing solutions that the workpiece after rinsing is placed in film agent and water soaks 5-10min, and the mass ratio of film agent and water is 1:3-5;
(C) the workpiece airing after previous step processing after forming cured film, workpiece surface is sprayed to described baking vanish;
(D) by spraying, the workpiece after baking vanish is placed under the environment of 70-80 ℃ after roasting 60-80min, obtains finished product.
10. the using method of a kind of baking vanish according to claim 9, is characterized in that, in described step (A), it is a kind of in ethanol or toluene that workpiece is carried out to pre-treatment degreaser used.
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| CN105463424A (en) * | 2015-12-31 | 2016-04-06 | 芜湖市金宇石化设备有限公司 | Surface treating method for die-cast aluminum alloy parts |
| CN105463423A (en) * | 2015-12-31 | 2016-04-06 | 芜湖市金宇石化设备有限公司 | Preparing method of treating fluid used for treating surfaces of die-cast aluminum alloy parts |
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| CN105860744A (en) * | 2016-04-12 | 2016-08-17 | 湖南省金海科技有限公司 | High-salt spray resistance one-component quick-drying grey epoxy primer and preparation method thereof |
| CN105949953A (en) * | 2016-06-12 | 2016-09-21 | 蚌埠市禹会区贵宾装饰材料商行 | Wear-resisting baked varnish for photo frame |
| CN106010240A (en) * | 2016-06-30 | 2016-10-12 | 太仓市金新涂料有限公司 | Environment-friendly high-strength corrosion resistant epoxy amino baking paint and preparation method thereof |
| CN106047064A (en) * | 2016-07-01 | 2016-10-26 | 太仓市金新涂料有限公司 | High-wear-resistance high-adhesive-force modified epoxy amino baking varnish and preparation method thereof |
| CN106800864A (en) * | 2017-01-11 | 2017-06-06 | 合肥英索莱特新材料科技有限公司 | Water-based insulating paint |
| CN106987195A (en) * | 2017-04-17 | 2017-07-28 | 德阳森华新材料科技有限公司 | The preparation method of wear-resisting and etch-proof water-base epoxy baking vanish |
| CN109719019A (en) * | 2018-12-25 | 2019-05-07 | 东莞市豪顺精密科技有限公司 | A kind of preparation method of simple process and the TV backboard of favorable rust preventing effect |
| WO2020237413A1 (en) * | 2019-05-24 | 2020-12-03 | 河北比尔尼克新材料科技股份有限公司 | Water-based paint for spring and preparation method therefor and application thereof, and spring |
| CN113061385A (en) * | 2021-03-31 | 2021-07-02 | 福州大学 | Weather-resistant high-hardness water epoxy amino baking paint and preparation method thereof |
| CN114163894A (en) * | 2021-11-15 | 2022-03-11 | 重庆海联水性涂料有限公司 | Epoxy aqueous baking varnish coating and preparation method thereof |
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