CN113462257A - Non-toxic aromatic water-based epoxy finish paint and preparation process thereof - Google Patents
Non-toxic aromatic water-based epoxy finish paint and preparation process thereof Download PDFInfo
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- CN113462257A CN113462257A CN202110789750.1A CN202110789750A CN113462257A CN 113462257 A CN113462257 A CN 113462257A CN 202110789750 A CN202110789750 A CN 202110789750A CN 113462257 A CN113462257 A CN 113462257A
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- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention discloses a non-toxic aromatic water-based epoxy finish paint and a preparation process thereof, belonging to the technical field of water-based epoxy finish paints, and comprising the following components in parts by weight: main paint, namely 100: 3-4 of curing agent; the main paint comprises the following components in percentage by mass: 60-85% of water-based epoxy resin, 8-12% of chitosan, 0-1% of calcium stearate, 6-10% of processing oil, 0.4-0.6% of polyacrylic acid flatting agent, 0.4-0.6% of polysiloxane defoaming agent, 0-0.4% of carboxymethyl cellulose, 0.2-0.4% of fumed silica and the balance of deionized water. Chitosan is added to assist in film forming, sagging prevention is achieved, the dried hardness of the paint is softened, the paint has high attaching degree, the edge warping is prevented, and local falling is prevented; the processing oil is added to improve the oiliness of the paint, the leveling is assisted, and the surface of the dried paint is flat and smooth.
Description
Technical Field
The invention relates to the technical field of water-based epoxy finish paint, in particular to non-toxic aromatic water-based epoxy finish paint and a preparation process thereof.
Background
The water-based epoxy finish paint is a water-based two-component epoxy finish paint, has strong paint film adhesion, good wear resistance, good chemical resistance, salt fog resistance, moderate acid, alkali and salt resistance, water as a dispersion medium, or no explosion, can be diluted by water and used for cleaning coating tools, has no pollution in the construction process, and has the characteristics of safety and environmental protection.
Patent No. CN201510070153.8 discloses an environment-friendly water-based epoxy finish paint, which comprises: 40-49% of epoxy resin, 0.1-0.5% of defoaming agent, 0.3-0.8% of dispersing agent, 0.2-0.5% of flatting agent, 8-15% of pigment, 10-20% of heavy calcium powder, 10-15% of curing agent and 15-40% of water; the preparation method comprises the following steps: (1) firstly, injecting epoxy resin and water into a reaction kettle; (2) starting a stirrer, adding the defoaming agent into the reaction kettle at the stirring speed of 400-600 rpm, and stirring for more than 10 minutes; (3) continuously adding the dispersing agent, the flatting agent, the pigment, the coarse whiting powder and the curing agent in turn at the stirring speed of 600 revolutions per minute of 400-; (4) and (4) pouring the material obtained in the step (3) into a sand mill for grinding, and then scraping the material to finish without coarse particles. The environment-friendly water-based epoxy finish paint adopts water-based silicone as a leveling agent, so that bubbles generated in the processes from paint preparation to construction are effectively eliminated, and the surface of a paint film is smooth and flat; meanwhile, the water-based finish paint reduces the volatilization of organic solvents and the emission of harmful pollutants, and is very environment-friendly. However, the water-based epoxy surface has the problems of high local hardening degree and easy shedding of a paint layer due to the presence of calcium powder, and the material layer has low viscosity, serious sagging and low surface flatness.
Disclosure of Invention
The invention aims to provide a non-toxic aromatic water-based epoxy finish paint and a preparation process thereof, chitosan is additionally arranged to assist film formation, sagging prevention is realized, the dried hardness of the paint is softened, the coating degree of the paint is high, edges are prevented from warping, and local falling is prevented; the processing oil is added to improve the oiliness of the paint, the leveling is assisted, and the surface of the dried paint is flat and smooth, so that the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a non-toxic aromatic water-based epoxy finish paint comprises the following components in parts by weight: main paint, namely 100: 3-4 of curing agent; the main paint comprises the following components in percentage by mass: 60-85% of water-based epoxy resin, 8-12% of chitosan, 0-1% of calcium stearate, 6-10% of processing oil, 0.4-0.6% of polyacrylic acid leveling agent, 0.4-0.6% of polysiloxane defoaming agent, 0-0.4% of carboxymethyl cellulose, 0.2-0.4% of fumed silica and the balance of deionized water, wherein the curing agent is benzoyl peroxide, and the processing oil is one or a mixture of more than two of tributyl citrate, epoxidized soybean oil and polyol ester in any proportion.
Further, the curing agent is benzoyl peroxide.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 10% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 12% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 8% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 10% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Further, the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of fumed silica and the balance of deionized water.
According to another aspect of the invention, a preparation process of a non-toxic aromatic water-based epoxy finish paint is provided, which comprises the following steps:
s101: weighing the following raw materials in percentage by mass: the coating comprises water-based epoxy resin, chitosan, calcium stearate, processing oil, a polyacrylic acid leveling agent, a polysiloxane antifoaming agent, carboxymethyl cellulose, fumed silica and deionized water;
s102: the aqueous epoxy resin, the chitosan, the calcium stearate and the processing oil with the formula ratio are put into a dispersion machine and dispersed at a high speed of 1500 revolutions per minute for 15 minutes at 1200 and uniformly;
s103: heating the solution in the dispersion cylinder to 45 +/-5 ℃, adding the rest of the additives in the formula amount, dispersing for 10 minutes at 600-800 rpm, and uniformly dispersing to obtain the main paint;
s104: and uniformly mixing the two components according to the weight ratio of the main paint to the curing agent of 100: 3-4 to obtain the non-toxic aromatic water-based epoxy finish paint.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the non-toxic aromatic water-based epoxy finish paint and the preparation process thereof, chitosan is added, the chitosan has an auxiliary film forming effect, a film is formed on the surface of the paint material immediately after the paint surface is coated, sagging is prevented, the dried hardness of the paint material is softened, the coating degree of the paint material is high, the edge warping is prevented, and the local falling is prevented;
2. the invention provides a non-toxic aromatic water-based epoxy finish paint and a preparation process thereof, which are additionally provided with processing oil, the component improves the oiliness of the paint, assists leveling, and the surface of the dried paint is flat and smooth.
Drawings
FIG. 1 is a flow chart of a preparation process of the non-toxic aromatic water-based epoxy finish paint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 one
A non-toxic aromatic water-based epoxy finish paint comprises the following components in parts by weight: main paint, namely curing agent which is 100: 3; the main paint comprises the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water, wherein the curing agent is benzoyl peroxide, and the processing oil is a mixture of tributyl citrate and epoxidized soybean oil in a ratio of 1: 1; the curing agent is benzoyl peroxide.
Referring to fig. 1, in order to better show the process flow of preparing the non-toxic aromatic waterborne epoxy finish paint, this embodiment now provides a process for preparing a non-toxic aromatic waterborne epoxy finish paint, which includes the following steps:
s101: weighing the following raw materials in percentage by mass: the coating comprises water-based epoxy resin, chitosan, calcium stearate, processing oil, a polyacrylic acid leveling agent, a polysiloxane antifoaming agent, carboxymethyl cellulose, fumed silica and deionized water;
s102: putting the water-based epoxy resin, the chitosan, the calcium stearate and the processing oil into a dispersion machine according to the formula ratio, and dispersing at a high speed of 1200 +/-10 revolutions per minute for 15 minutes to be uniform;
s103: heating the solution in the dispersion cylinder to 45 +/-5 ℃, adding the rest auxiliary agents in the formula amount, dispersing for 10 minutes at 600 +/-10 revolutions per minute, and dispersing uniformly to obtain the main paint;
s104: and uniformly mixing the two components according to the weight ratio of the main paint to the curing agent of 100:3 to obtain the non-toxic aromatic water-based epoxy finish paint.
Example two
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 10% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
EXAMPLE III
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 12% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Example four
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 8% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
EXAMPLE five
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 10% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
EXAMPLE six
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 8% of chitosan, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
EXAMPLE seven
The difference between the embodiment and the embodiment one is only that the composition of the main paint in the embodiment is different and the mass percentage of each component is different, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of fumed silica and the balance of deionized water.
Comparative example 1
The difference between the comparative example and the first example is only that the main paint in the comparative example is different in components and the mass percentages of the components, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
Comparative example No. two
The difference between the comparative example and the first example is only that the main paint in the comparative example is different in components and the mass percentages of the components, and the main paint is composed of the following components in mass percentage: 75% of water-based epoxy resin, 10% of chitosan, 0.8% of calcium stearate, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
The mass percentages of the components in the main paint of the above examples and comparative examples are counted, and the obtained data are shown in the following table 1:
TABLE 1 statistical data of mass percent of main paint component in non-toxic aromatic waterborne epoxy finish paint
The non-toxic aromatic water-based epoxy finish paint is adopted in the first to seventh examples and the first to second comparative examples, 100 pieces of glass with the same area and thickness are selected in each example, and the non-toxic aromatic water-based epoxy finish paint is coated on the glass, wherein each performance of the non-toxic aromatic water-based epoxy finish paint is detected. And the statistical test result data are shown in the following table 2:
TABLE 2 non-toxic aromatic waterborne epoxy topcoat Properties
| Performance of | Dry film thickness | Appearance of paint layer | Self-cleaning effect | Anti-sagging | Hardness of | Toxicity |
| ExamplesA | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Is free of |
| Example two | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Is free of |
| EXAMPLE III | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Is free of |
| Example four | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Is free of |
| EXAMPLE five | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Is free of |
| EXAMPLE six | 2mm | Smooth and flat | Lotus leaf effect | 1250um | H | Micro toxicity |
| EXAMPLE seven | 2mm | Smooth and flat | Lotus leaf effect | 1000um | H | Is free of |
| Comparative example 1 | 2mm | Smooth and flat | Lotus leaf effect | 900um | 2H | Is free of |
| Comparative example No. two | 2mm | Surface fine lines | Micro dust attachment | 1250um | 2H | Is free of |
According to the detection data in the first to seventh examples and the first to second comparative examples, the removal of carboxymethyl cellulose or chitosan in the paint can result in low paint liquid consistency, sagging phenomenon, increased hardness due to the removal of chitosan or processing oil, reduced coating degree of the paint layer, damaged self-cleaning barrier due to the removal of processing oil, and fine lines on the surface of the paint layer.
The calcium stearate is used as a nontoxic heat stabilizer of the waterborne epoxy finish paint, so that the stability of the waterborne epoxy finish paint is improved, the waterborne epoxy finish paint is prevented from being modified in severe weather, and absolute nontoxicity is realized;
carboxymethyl cellulose is used as a thickening agent to adjust the consistency of paint, the paint can be dissolved in water to generate transparent colloidal liquid with the viscosity (25 ℃) of 10-40 mPa/s, and the transparent colloidal liquid is used as a film forming agent and a plasticizing adhesive in a product.
In summary, the following steps: according to the non-toxic aromatic water-based epoxy finish paint and the preparation process thereof, chitosan is added, the chitosan has an auxiliary film forming effect, a film is formed on the surface of the paint material immediately after the paint surface is coated, sagging is prevented, the dried hardness of the paint material is softened, the coating degree of the paint material is high, the edge warping is prevented, and the local falling is prevented; the processing oil is added, the oil property of the paint is improved by the component, the leveling is assisted, and the surface of the dried paint is flat and smooth.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The non-toxic aromatic waterborne epoxy finish paint is characterized by comprising the following components in parts by weight: main paint, namely 100: 3-4 of curing agent; the main paint comprises the following components in percentage by mass: 60-85% of water-based epoxy resin, 8-12% of chitosan, 0-1% of calcium stearate, 6-10% of processing oil, 0.4-0.6% of polyacrylic acid leveling agent, 0.4-0.6% of polysiloxane defoaming agent, 0-0.4% of carboxymethyl cellulose, 0.2-0.4% of fumed silica and the balance of deionized water, wherein the curing agent is benzoyl peroxide, and the processing oil is one or a mixture of more than two of tributyl citrate, epoxidized soybean oil and polyol ester in any proportion.
2. The non-toxic aromatic waterborne epoxy topcoat of claim 1, wherein the curing agent is benzoyl peroxide.
3. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
4. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 10% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
5. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 12% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
6. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 8% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
7. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 10% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
8. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of carboxymethyl cellulose, 0.2% of fumed silica and the balance of deionized water.
9. The non-toxic aromatic water-based epoxy finish paint as claimed in claim 1, wherein the main paint is composed of the following components in percentage by mass: 75% of water-based epoxy resin, 8% of chitosan, 0.8% of calcium stearate, 6% of processing oil, 0.4% of polyacrylic acid leveling agent, 0.4% of polysiloxane defoaming agent, 0.2% of fumed silica and the balance of deionized water.
10. A process for preparing a non-toxic aromatic waterborne epoxy topcoat as claimed in any one of claims 1 to 9, comprising the steps of:
s101: weighing the following raw materials in percentage by mass: the coating comprises water-based epoxy resin, chitosan, calcium stearate, processing oil, a polyacrylic acid leveling agent, a polysiloxane antifoaming agent, carboxymethyl cellulose, fumed silica and deionized water;
s102: the aqueous epoxy resin, the chitosan, the calcium stearate and the processing oil with the formula ratio are put into a dispersion machine and dispersed at a high speed of 1500 revolutions per minute for 15 minutes at 1200 and uniformly;
s103: heating the solution in the dispersion cylinder to 45 +/-5 ℃, adding the rest of the additives in the formula amount, dispersing for 10 minutes at 600-800 rpm, and uniformly dispersing to obtain the main paint;
s104: and uniformly mixing the two components according to the weight ratio of the main paint to the curing agent of 100: 3-4 to obtain the non-toxic aromatic water-based epoxy finish paint.
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