CN111944399A - Alkyd protective coating with high solid content and low VOC content and preparation method thereof - Google Patents
Alkyd protective coating with high solid content and low VOC content and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/46—Polyesters chemically modified by esterification
- C08G63/48—Polyesters chemically modified by esterification by unsaturated higher fatty oils or their acids; by resin acids
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
- C09D7/41—Organic pigments; Organic dyes
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention belongs to the technical field of coatings, and discloses an alkyd protective coating with high solid content and low VOC content and a preparation method thereof, wherein a part of high-flash-point odorless solvent and high-solid-content alkyd resin are added into a feeding dispersion cylinder, and then the mixture is uniformly stirred; sequentially adding the lead-free pigment and the antirust pigment, stirring at a high speed, and uniformly mixing; sucking the dispersed slurry into a sand mill by a pump until the fineness of the slurry is less than 30um and the slurry is in a stable state; pumping the ground slurry into a paint mixing cylinder through a pump, simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by using the residual odorless solvent with high flash point, adding the lead-free drier and the residual alkyd resin with high solid content, and uniformly stirring to obtain the alkyd protective paint. The coating prepared by the invention has the advantages of good adhesive force, good flexibility, high hardness, good alkali resistance, good acid resistance, good wear resistance, good weather resistance and the like.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an alkyd protective coating with high solid content and low VOC content and a preparation method thereof.
Background
The alkyd resin coating has the advantages of good comprehensive performance, low cost, convenient construction, wide application and the like, is widely applied to decoration and protection in the fields of bridge steel structure plants, net racks and engineering machinery, and has a great proportion in the total output of the coating industry. Because the solid content of the traditional solvent-based coating is relatively low, the proportion of Volatile Organic Compounds (VOC) generated in the production or use process is large, the pollution to the ecological environment is caused, the harm is brought to the human body, and the natural resources are wasted. With the increasing strictness of national environmental protection policy and regulation, the collection of consumption tax and pollution discharge fee and the increasing awareness of environmental protection of people. How to reduce the emission of VOC of solvent-based coatings is a great problem to be solved by alkyd paints.
Meanwhile, in recent years, chemical safety accidents occur frequently all over the country, the traditional solvent-based alkyd resin coating belongs to dangerous chemicals due to the fact that the flash point of the traditional solvent-based alkyd resin coating is about 30-40 ℃, the safety performance is low, and along with the improvement of the national chemical safety improvement work, the traditional solvent-based alkyd resin coating is increasingly limited in the production, transportation and use processes, and the improvement of the safety performance of the alkyd resin coating is also a difficult problem which is urgently needed to be solved at present.
In recent years, water-based alkyd paints are prepared by various methods at home and abroad to reduce VOC (volatile organic compounds) emission and improve safety performance, but the water-based alkyd paints prepared by adopting water-diluted alkyd resins have the problems of incapability of construction in winter, incapability of drying when humidity is high, poor water resistance and the like at present; the comprehensive performance of the water-based alkyd paint prepared by adopting the water-soluble alkyd resin is difficult to compare favorably with that of the traditional solvent-based alkyd paint, and the factors restrict the large-area popularization and use of the water-based alkyd.
When the water-based alkyd resin coating cannot completely meet the market use requirement, the technical staff in the field needs to solve the problem of how to further improve the environmental protection performance and the safety performance of the solvent alkyd coating and improve the comprehensive performance of the water-based alkyd coating to replace the traditional solvent-based alkyd coating with high VOC and low flash point.
Disclosure of Invention
In view of the above, the invention provides the alkyd protective coating with high solid content and low VOC content by preparing the specific raw materials, and the alkyd protective coating has the advantages of good adhesion, good flexibility, high hardness, good alkali resistance, good acid resistance, good wear resistance, good weather resistance and the like, and is a protective coating with excellent safety performance and environmental protection performance suitable for popularization and application.
In order to achieve the purpose, the invention adopts the following technical scheme:
an alkyd protective coating with high solid content and low VOC content comprises the following raw materials in parts by weight:
preferably, the high-solid alkyd resin is prepared by performing high-temperature reaction on glycerol, natural soybean oil, lithium hydroxide and phthalic anhydride, refluxing by using a high-flash-point odorless solvent, and diluting, wherein the closed-flash-point alkyd resin is prepared and has a flash point of more than 60 ℃ and a solid content of more than 70%.
Preferably, the high-solid alkyd resin is prepared by the following method:
stirring natural soybean oil and glycerol in a reaction kettle, heating, stopping stirring when the temperature reaches 120 ℃, and adding lithium hydroxide; continuously stirring and heating to 250-270 ℃, keeping the temperature for 40-60min, measuring the neutralization rate, and cooling to below 200 ℃ when the neutralization rate reaches the standard (the neutralization rate reaches the standard, namely the product obtained after heat preservation and ethanol are uniformly mixed and stirred according to the mass ratio of 1:5 and then are in a transparent state); adding phthalic anhydride when the temperature is below 200 ℃, simultaneously putting a high flash point reflux solvent from the head tank, continuously heating to 160-180 ℃, starting reflux, raising the temperature to 220-240 ℃ at the rate of raising the temperature by 20 ℃ per hour, keeping the temperature for 50-65min, immediately cooling to 155-175 ℃ when the acid value is detected to be below 15mgKOH/g, and then diluting with the high flash point odorless solvent to obtain the high-solid alkyd resin. The total reaction time is about 14-16 hours.
Preferably, the weight percentages of the raw materials added in the preparation process of the high-solid alkyd resin are as follows: 40-45% of natural soybean oil, 12-15% of glycerol, 0.01-0.02% of lithium hydroxide, 20-25% of phthalic anhydride, 3-5% of high flash point reflux solvent and 19-25% of high flash point odorless solvent.
Preferably, the high flash point reflux solvent is a dearomatization solvent with the flash point of more than 60 ℃, and the distillation range is 150-160 ℃.
Preferably, the lead-free drier is one or a mixture of more of metal oxides or metal salts of cobalt, manganese, iron, zinc and calcium or a rare earth drier.
Preferably, the high-flash-point odorless solvent is one or a mixture of ethylene glycol diacetate and ethylmethyl glyoxylate.
Preferably, the lead-free pigment is a titanium dioxide series or an organic pigment series.
Specifically, the lead-free pigment is one or a mixture of organic medium yellow, organic scarlet, nano titanium dioxide and the like; the performance requirements are that the alloy does not contain heavy metal substances such as chromium, cadmium, lead, mercury and the like, the light resistance is more than 7 grade, the weather resistance is more than 7 grade, and the heat resistance is more than 200 ℃.
Preferably, the antirust pigment is antirust silicon powder series.
Specifically, the antirust pigment is ion exchange type antirust silicon powder; the performance requirement is that one or two of calcium ions and silicate ions are mixed and modified to obtain the antirust silicon powder.
The invention also aims to provide a preparation method of the alkyd protective coating with high solid content and low VOC content, which comprises the following steps:
1) pre-dispersing: adding 40-50% of the total amount of the high-flash-point odorless solvent and 40-50% of the total amount of the high-solid alkyd resin into a feeding dispersion cylinder, and then uniformly stirring; sequentially adding the lead-free pigment and the antirust pigment, stirring at a high speed, and uniformly mixing;
2) grinding: sucking the dispersed slurry into a sand mill by a pump, and keeping the rotating speed at 500-;
3) paint mixing: pumping the ground slurry into a paint mixing cylinder through a pump, simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by using the residual odorless solvent with high flash point, adding the lead-free drier and the residual alkyd resin with high solid content, and uniformly stirring to obtain the alkyd protective paint.
Preferably, the pump is a diaphragm pump or a gear pump.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the alkyd protective coating with high solid content and low VOC content disclosed by the invention fully exerts the advantages of good weather resistance, good flexibility and the like of soybean oleic acid due to the adoption of a high-flash-point solvent, high-solid-content resin and environment-friendly raw materials, so that the prepared alkyd protective coating has the advantages of high flash point, closed flash point higher than 60 ℃, solid content higher than 75%, good adhesive force, good flexibility, high hardness, good alkali resistance, good acid resistance, good wear resistance, good weather resistance, smooth and delicate paint film, no toxicity, no pollution and the like.
2. The closed flash point of the alkyd protective coating with high solid content and low VOC content prepared by the invention can reach above 60 ℃, and the alkyd protective coating belongs to the category of non-hazardous chemicals, greatly improves the safety performance of the coating, and solves the problems of storage and transportation; the VOC content can reach below 250g/L, the discharge amount of VOC is reduced, and the effect of protecting the environment is achieved.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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
Preparing high-solid alkyd resin with a flash point of more than 60 ℃:
in a reaction kettle equipped with a stirrer, 3320kg of natural soybean oil and 928kg of glycerol are added according to weight, then stirring and temperature rising are started, and when the temperature reaches 120 ℃, 1.2kg of lithium hydroxide is stopped being added. After the stirring is finished, the temperature is continuously raised to 250-270 ℃ and the heat preservation is started. And (3) measuring the clearing rate (the resin solid content: ethanol is mixed and stirred uniformly according to the proportion of 1:5 to obtain a transparent state, and the mass ratio is measured after about 40min to 60 min), and cooling to below 200 ℃ when the clearing rate reaches the standard. 1760kg of phthalic anhydride is added when the temperature is below 200 ℃, and 256kg of high flash point reflux solvent is simultaneously added from the head tank. And continuously heating to 160 ℃ to start refluxing, raising the temperature to 230 ℃ at the rate of 20 ℃ per hour, and keeping the temperature for 60min, wherein the acid value is detected to reach 12 mgKOH/g. Immediately cooling to 160 ℃, pumping the materials into a diluting kettle, stirring and adding 1760kg of tasteless solvent with high flash point for diluting to obtain the alkyd resin with high solid content.
Example 2
Preparing high-solid alkyd resin with a flash point of more than 60 ℃:
3150kg of natural soybean oil and 900kg of glycerol are added into a reaction kettle with a stirrer, and then stirring and heating are started, and when the temperature reaches 120 ℃, 0.75kg of lithium hydroxide is added. After the stirring is finished, the temperature is continuously raised to 250-270 ℃ and the heat preservation is started. And (3) measuring the clearing rate (the resin solid content: ethanol is mixed and stirred uniformly according to the proportion of 1:5 to obtain a transparent state, and the mass ratio is measured after about 40min to 60 min), and cooling to below 200 ℃ when the clearing rate reaches the standard. 1650kg of phthalic anhydride was added to the reaction mixture at a temperature of 200 ℃ or lower, and 225kg of ethylene glycol diacetate solvent was simultaneously introduced from the head tank. And continuously heating to 160 ℃ to start refluxing, raising the temperature to 230 ℃ at the rate of 20 ℃ per hour, and keeping the temperature for 60min, wherein the acid value is detected to reach 12 mgKOH/g. Immediately cooling to 160 ℃, pumping the materials into a diluting kettle, stirring, adding 1575kg of high flash point odorless solvent, and diluting to obtain the high-solid alkyd resin.
Further, the high solids alkyd resins prepared in example 1 and example 2 were tested according to the following test criteria in table 1:
TABLE 1
| Detecting items | Index (I) | Detection method |
| Flash point (closed mouth), ° c | 60 | GB/T5208 |
| Solids content,% >) | 75 | GB/T1725 |
See table 2 for the results of the examples:
TABLE 2
Example 3
Preparation of non-hazardous high solids, low VOC alkyd protective coating (using the high solids alkyd prepared in example 1):
adding 204kg of ethyl methyl formate and 1800kg of high-solid alkyd resin with the flash point of more than 60 ℃ into a feeding dispersion cylinder, and uniformly stirring; then adding 1500kg of organic medium yellow and 480kg of calcium ion exchange type antirust silicon powder in sequence, and stirring at high speed for 40-60min to make the whole body in a uniform state; sucking the dispersed slurry into a sand mill by a pump (a diaphragm pump or a gear pump), starting the sand mill to a speed of 500 plus materials per minute for 600 revolutions after starting the sand mill, grinding for 2-3 hours until the fineness is less than 30um, pumping the ground slurry into a paint mixing cylinder by the pump (the diaphragm pump or the gear pump), simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by 180kg of ethylmethyl glyoxylate, sequentially adding 1800kg of high-solid alkyd resin with the flash point of more than 60 ℃ and 36kg of cobalt, manganese and calcium mixed drier, stirring, dispersing and mixing uniformly to obtain the target product.
Example 4
Preparation of non-hazardous high solids, low VOC alkyd protective coating (using the high solids alkyd prepared in example 2):
adding 240kg of ethyl methyl formate and 1800kg of high-solid alkyd resin with the flash point of more than 60 ℃ into a feeding dispersion cylinder, and uniformly stirring; 1440kg of organic scarlet and 600kg of silicate ion exchange type antirust silicon powder are added in sequence, and the mixture is stirred at high speed for 40 to 60min to ensure that the whole mixture is in a uniform state; sucking the dispersed slurry into a sand mill by a pump (a diaphragm pump or a gear pump), starting the sand mill to a speed of 500 plus materials per minute for 600 revolutions after starting the sand mill, grinding for 2-3 hours until the fineness is less than 30um, pumping the ground slurry into a paint mixing cylinder by the pump (the diaphragm pump or the gear pump), simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by 240kg of ethylmethyl glyoxylate, sequentially adding 1680kg of high-solid alkyd resin with the flash point of more than 60 ℃ and 30kg of cobalt-manganese-rare earth mixed drier, stirring, dispersing and mixing uniformly to obtain the target product.
Example 5
Preparation of non-hazardous high solids, low VOC alkyd protective coating (using the high solids alkyd prepared in example 2):
216kg of ethylene glycol diacetate and 1680kg of high-solid alkyd resin with the flash point of more than 60 ℃ are added into a feeding dispersion cylinder and are stirred uniformly; then 1710kg of nano titanium dioxide and 420kg of silicate ion exchange type antirust silicon powder are sequentially added, and the mixture is stirred at high speed for 40-60min to ensure that the whole mixture is in a uniform state; sucking the dispersed slurry into a sand mill by a pump (a diaphragm pump or a gear pump), starting the sand mill to a speed of 500 plus materials per minute and 600 revolutions per minute after starting the sand mill, grinding for 2-3 hours until the fineness is less than 30um, pumping the ground slurry into a paint mixing cylinder by the pump (the diaphragm pump or the gear pump), simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by 258kg of ethylene glycol diacetate, sequentially adding 1680kg of high-solid alkyd resin with the flash point more than 60 ℃ and 36kg of cobalt, zinc, calcium and rare earth mixed drier, stirring, dispersing and mixing uniformly to obtain the target product.
Example 6
Preparation of non-hazardous high solids, low VOC alkyd protective coating (using the high solids alkyd prepared in example 1):
210kg of ethylene glycol diacetate and 1500kg of high-solid alkyd resin with the flash point of more than 60 ℃ are added into a feeding dispersion cylinder and are stirred uniformly; then adding 200kg of nano titanium dioxide, 1600kg of organic medium yellow, 280kg of silicate ion exchange type antirust silicon powder and 200kg of calcium ion exchange type antirust silicon powder in sequence, and stirring at high speed for 40-60min to ensure that the whole is in a uniform state; sucking the dispersed slurry into a sand mill by a pump (a diaphragm pump or a gear pump), starting the sand mill to a speed of 500 plus materials per minute for 600 revolutions after starting the sand mill, grinding for 2-3 hours until the fineness is less than 30um, pumping the ground slurry into a paint mixing cylinder by the pump (the diaphragm pump or the gear pump), simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by 120kg of ethyl methyl glyoxylate, and sequentially adding 1860kg of high-solid alkyd resin with the flash point of more than 60 ℃ and 30kg of cobalt, manganese, calcium and rare earth mixed drier, stirring, dispersing and mixing uniformly to obtain a target product.
Further, the performance of the non-hazardous high-solid low-VOC alkyd protective coatings prepared in examples 3-6 was tested according to the following test standards in Table 3:
TABLE 3
See table 4 for the results of the test:
TABLE 4
As can be seen from Table 4, the performances of the alkyd protective coating with high solid content and low VOC content, which is a non-hazardous article, prepared by the invention meet the market requirements, and the alkyd protective coating is a protective coating with excellent safety performance and environmental protection performance and is suitable for popularization and application.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The alkyd protective coating with high solid content and low VOC content is characterized by comprising the following raw materials in parts by weight:
2. the alkyd protective coating with high solid content and low VOC content according to claim 1, characterized in that the alkyd resin with high solid content is prepared by using glycerol, natural soybean oil, lithium hydroxide and phthalic anhydride, performing high-temperature reaction, refluxing by using a tasteless solvent with high flash point, and diluting to obtain the alkyd resin with closed flash point of more than 60 ℃ and solid content of more than 70%.
3. The high-solids, low-VOC alkyd protective coating of claim 2, wherein said high-solids alkyd resin is prepared by the process of:
stirring natural soybean oil and glycerol in a reaction kettle, heating, stopping stirring when the temperature reaches 120 ℃, and adding lithium hydroxide; continuously stirring and heating to 250-270 ℃, keeping the temperature for 40-60min, measuring the neutralization rate, and cooling to below 200 ℃ when the neutralization rate reaches the standard; adding phthalic anhydride when the temperature is below 200 ℃, simultaneously putting a high flash point reflux solvent from the head tank, continuously heating to 160-180 ℃, starting reflux, raising the temperature to 220-240 ℃ at the rate of raising the temperature by 20 ℃ per hour, keeping the temperature for 50-65min, immediately cooling to 155-175 ℃ when the acid value is detected to be below 15mgKOH/g, and then diluting with the high flash point odorless solvent to obtain the high-solid alkyd resin.
4. The alkyd protective coating with high solid content and low VOC content according to claim 3, wherein the weight percentage of each raw material added in the preparation process of the high solid alkyd resin is as follows: 40-45% of natural soybean oil, 12-15% of glycerol, 0.01-0.02% of lithium hydroxide, 20-25% of phthalic anhydride, 3-5% of high flash point reflux solvent and 19-25% of high flash point odorless solvent.
5. The alkyd protective coating with high solid content and low VOC content as claimed in claim 3 or 4, wherein the high flash point reflux solvent is dearomatized solvent with flash point > 60 ° and distillation range is 150-160 ℃.
6. The alkyd protective coating with high solid content and low VOC content of claim 1, wherein the lead-free drier is one or a mixture of several of metal oxides or metal salts of cobalt, manganese, iron, zinc and calcium or a rare earth drier; the odorless solvent with high flash point is one or mixture of ethylene glycol diacetate and ethyl formylformate.
7. The alkyd protective coating with high solid content and low VOC content according to claim 3, wherein the clear neutralization rate reaches the standard, namely that the mass ratio of the product obtained after heat preservation to ethanol is 1:5, and then the mixture is in a transparent state after being uniformly mixed and stirred.
8. The alkyd protective coating with high solid content and low VOC content of claim 1, wherein the lead-free pigment is a titanium dioxide series or an organic pigment series; the antirust pigment is a series of antirust silicon powder.
9. A method of preparing a high solids, low VOC alkyd protective coating according to any of claims 1-8, comprising the steps of:
1) pre-dispersing: adding 40-50% of the total amount of the high-flash-point odorless solvent and 40-50% of the total amount of the high-solid alkyd resin into a feeding dispersion cylinder, and then uniformly stirring; sequentially adding the lead-free pigment and the antirust pigment, stirring at a high speed, and uniformly mixing;
2) grinding: sucking the dispersed slurry into a sand mill by a pump, and keeping the rotating speed at 500-;
3) paint mixing: pumping the ground slurry into a paint mixing cylinder through a pump, simultaneously flushing the residual slurry in the sand mill into the paint mixing cylinder by using the residual odorless solvent with high flash point, adding the lead-free drier and the residual alkyd resin with high solid content, and uniformly stirring to obtain the alkyd protective paint.
10. The method for preparing the alkyd protective coating with high solid content and low VOC content of claim 9, wherein the pump is a diaphragm pump or a gear pump.
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Cited By (5)
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| CN113185903A (en) * | 2021-05-26 | 2021-07-30 | 河北晨虹油漆有限公司 | Safe alkyd paint and preparation method thereof |
| CN114479625A (en) * | 2022-01-07 | 2022-05-13 | 湘江涂料科技有限公司 | High-flash-point alkyd resin protective finish |
| CN115260471A (en) * | 2022-08-30 | 2022-11-01 | 江苏冠军科技集团股份有限公司 | Alkyd protective coating with high flash point, high solid content and low VOCs |
| CN115368790A (en) * | 2022-06-28 | 2022-11-22 | 湖南梓先新材料有限公司 | Primer-topcoat coating and preparation method thereof |
| CN116463036A (en) * | 2023-05-29 | 2023-07-21 | 海丰县美达化工涂料有限公司 | High-flash-point safe alkyd enamel and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050272A (en) * | 2007-05-14 | 2007-10-10 | 江苏长江涂料有限公司 | Anticorrosive bottom lacquer of water-soluble alcohol acid, and preparation method |
| CN103435791A (en) * | 2013-08-07 | 2013-12-11 | 山东奔腾漆业有限公司 | Acid alcohol resin for light-smell dope and preparation method of acid alcohol resin |
| CN106867375A (en) * | 2017-03-02 | 2017-06-20 | 江苏冠军涂料科技集团股份有限公司 | A kind of natural plants oil-modified alkyd paint and its preparation technology |
| CN109943206A (en) * | 2019-03-08 | 2019-06-28 | 安徽凤凰涂料科技有限公司 | A kind of safety industrial alkyd paint and preparation method thereof |
-
2020
- 2020-08-25 CN CN202010864826.8A patent/CN111944399A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050272A (en) * | 2007-05-14 | 2007-10-10 | 江苏长江涂料有限公司 | Anticorrosive bottom lacquer of water-soluble alcohol acid, and preparation method |
| CN103435791A (en) * | 2013-08-07 | 2013-12-11 | 山东奔腾漆业有限公司 | Acid alcohol resin for light-smell dope and preparation method of acid alcohol resin |
| CN106867375A (en) * | 2017-03-02 | 2017-06-20 | 江苏冠军涂料科技集团股份有限公司 | A kind of natural plants oil-modified alkyd paint and its preparation technology |
| CN109943206A (en) * | 2019-03-08 | 2019-06-28 | 安徽凤凰涂料科技有限公司 | A kind of safety industrial alkyd paint and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 霍明甲: "混合溶剂的闪点变化规律探析", 《安全、健康和环境》 * |
Cited By (6)
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|---|---|---|---|---|
| CN113185903A (en) * | 2021-05-26 | 2021-07-30 | 河北晨虹油漆有限公司 | Safe alkyd paint and preparation method thereof |
| CN114479625A (en) * | 2022-01-07 | 2022-05-13 | 湘江涂料科技有限公司 | High-flash-point alkyd resin protective finish |
| CN115368790A (en) * | 2022-06-28 | 2022-11-22 | 湖南梓先新材料有限公司 | Primer-topcoat coating and preparation method thereof |
| CN115260471A (en) * | 2022-08-30 | 2022-11-01 | 江苏冠军科技集团股份有限公司 | Alkyd protective coating with high flash point, high solid content and low VOCs |
| CN115260471B (en) * | 2022-08-30 | 2023-09-15 | 江苏冠军科技集团股份有限公司 | Alkyd protective coating with high flash point, high solid content and low VOCs (volatile organic compounds) |
| CN116463036A (en) * | 2023-05-29 | 2023-07-21 | 海丰县美达化工涂料有限公司 | High-flash-point safe alkyd enamel and preparation method thereof |
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