CN111040624A - Water-based organic silicon coating and preparation method thereof - Google Patents
Water-based organic silicon coating 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
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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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- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention belongs to the field of coatings, and discloses a water-based organic silicon coating which comprises the following components in parts by weight: 40-75 parts of water-based organic silicon emulsion, 2-10 parts of water-based polyurethane-polyacrylic acid emulsion, 0.5-2 parts of flatting agent, 0.2-1 part of dispersing agent, 0.5-5 parts of thickening agent, 5-25 parts of filler, 5-20 parts of pigment and 5-25 parts of water. According to the invention, the water-based organic silicon resin is used as a water-based polyurethane-polyacrylic acid emulsion film forming material, the water-based acrylic acid leveling agent is added to form a film, water is used as a solvent, other auxiliary agents are added, and the components have good compatibility, so that the obtained water-based organic silicon high-temperature resistant coating has good water solubility, the VOC content is lower than 3%, and the coating is clean, environment-friendly and pollution-free.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to a water-based organic silicon coating and a preparation method thereof.
Background
The non-stick coating is a special coating, the surface of which is not easy to be adhered by other sticky substances or is easy to be removed after being adhered. The non-stick coating is an environment-friendly special coating with strong practicability and high technical content, and is more and more concerned by coating research and development workers.
The prior fluorine coating is not convenient to construct and has higher cost; the nano ceramic non-stick coating is limited in use and popularization due to the complex construction and high price. The organic fluororesin has excellent weatherability, stain resistance, heat resistance, chemical resistance, water resistance, oil resistance and the like, and plays an important role in the high-temperature resistant resin. However, the organic fluorine resin is expensive, and has the defects of strict requirements on the treatment of a substrate during construction, poor processability, high melting temperature, insolubility in common solvents and the like, while the existing organic silicon coating is favored by the market because of the advantages of good construction, easy operation, good performance and the like, but has a plurality of defects in the aspects of non-adhesiveness, corrosion resistance and chemical resistance.
The traditional organosilicon high-temperature non-stick coating uses a solvent system, VOC generally exceeds the standard (420g/L), and the coating is not environment-friendly and has certain pollution to the atmosphere and water bodies. The water-based silicone material is a worldwide problem, so that the silicone material can not be well water-based at present, and even if the silicone material has water-based property, the performance, particularly the temperature resistance, solvent resistance and the like, of the silicone material is more different from that of a traditional solvent-based system.
Therefore, there is a need to develop a water-based silicone coating with high hardness, corrosion resistance, wear resistance and high temperature resistance.
Disclosure of Invention
The invention aims to provide a water-based organic silicon coating and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the water-based organic silicon coating comprises the following components in parts by weight: 40-75 parts of water-based organic silicon emulsion, 2-10 parts of water-based polyurethane-polyacrylic acid emulsion, 0.5-2 parts of flatting agent, 0.2-1 part of dispersing agent, 0.5-5 parts of thickening agent, 5-25 parts of filler, 5-20 parts of pigment and 5-25 parts of water.
Preferably, the aqueous silicone emulsion is prepared by the following method: dispersing organic silicon resin and fatty alcohol-polyoxyethylene ether in a dispersing machine at 60-80 ℃, stirring in a stirring machine with the speed of 5000-10000 r/min, and dripping water for 1.5-2h to obtain the water-based organic silicon emulsion.
Preferably, the leveling agent is selected from at least one of an aqueous acrylic leveling agent, an aqueous fluorosilicone resin, aryl modified polysiloxane, polyether polyester modified organic siloxane or alkyl modified organic siloxane.
Preferably, the filler is selected from at least one of barium sulfate, talc and bentonite.
Preferably, the pigment is selected from at least one of carbon black or aluminum powder.
Preferably, the dispersant is selected from AKN-2076 dispersants.
AKN-2076 is a macromolecule block copolymer containing pigment-philic group, belonging to macromolecule super-dispersant containing pigment-philic group, which has good wettability, and has strong adsorption and dispersion ability to organic pigment and carbon black compared with micromolecule wetting dispersant, and is suitable for aqueous system.
Preferably, the thickener is at least one of a hydrophobically modified cellulose-based thickener, sodium polyacrylate, and an associative polyurethane thickener.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding pigment and filler into a dispersing agent, stirring and grinding to obtain a pigment and filler dispersion liquid intermediate;
(2) and adding the aqueous organic silicon emulsion, the aqueous polyurethane-polyacrylic acid emulsion, the flatting agent, the thickening agent and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organic silicon coating.
Preferably, in the step (1), the rotation speed of the stirring is 500-.
The beneficial technical effects of the invention are as follows:
according to the invention, the water-based organic silicon resin and the water-based polyurethane-polyacrylic acid emulsion are used as film forming materials, the water-based acrylic acid leveling agent is added to form a film, the water is used as a solvent, other auxiliary agents are added, and the components have good compatibility, so that the obtained water-based organic silicon high-temperature resistant coating has good water solubility, the content of VOC (volatile organic compound) is lower than 3%, and the coating is clean, environment-friendly and pollution-free. The water-based organic silicon high-temperature resistant coating obtained by the invention adopts single-component construction and a method of directly brushing or spraying the coating on the surface of a workpiece, and has the advantages of simple use and room-temperature drying and curing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by examples below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Example 1
The water-based organic silicon coating comprises the following components in parts by weight: 40 parts of water-based organic silicon resin emulsion, 5 parts of water-based polyurethane-polyacrylic acid emulsion, 0.2 part of water-based acrylic acid leveling agent, 0.3 part of water-based fluorosilicone resin, 0.1 part of AKN-2076 dispersant, 1 part of hydrophobic modified cellulose thickener, 1 part of sodium polyacrylate, 2 parts of barium sulfate, 3 parts of talcum powder, 2 parts of carbon black, 3 parts of aluminum powder and 5 parts of water.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding carbon black, aluminum powder, barium sulfate and talcum powder into AKN-2076 dispersing agent, stirring and grinding to obtain a pigment filler dispersion liquid intermediate;
(2) adding aqueous organosilicon emulsion, aqueous polyurethane-polyacrylic acid emulsion, aqueous acrylic acid flatting agent, aqueous fluorine-silicon resin, hydrophobic modified cellulose thickener, sodium polyacrylate and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organosilicon coating.
Example 2
The water-based organic silicon coating comprises the following components in parts by weight: 75 parts of water-based organic silicon resin emulsion, 10 parts of water-based polyurethane-polyacrylic acid emulsion, 1 part of water-based acrylic acid leveling agent, 1 part of water-based fluorosilicone resin, 1 part of AKN-2076 dispersant, 1.5 parts of hydrophobic modified cellulose thickener, 2 parts of sodium polyacrylate, 10 parts of barium sulfate, 15 parts of talcum powder, 10 parts of carbon black, 15 parts of aluminum powder and 25 parts of water.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding carbon black, aluminum powder, barium sulfate and talcum powder into AKN-2076 dispersing agent, stirring and grinding to obtain a pigment filler dispersion liquid intermediate;
(2) adding aqueous organosilicon emulsion, aqueous polyurethane-polyacrylic acid emulsion, aqueous acrylic acid flatting agent, aqueous fluorine-silicon resin, hydrophobic modified cellulose thickener, sodium polyacrylate and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organosilicon coating.
Example 3
The water-based organic silicon coating comprises the following components in parts by weight: 50 parts of water-based organic silicon resin emulsion, 7 parts of water-based polyurethane-polyacrylic acid emulsion, 2 parts of water-based acrylic flatting agent, 1 part of water-based fluorosilicone resin, 0.5 part of AKN-2076 dispersant, 1 part of hydrophobic modified cellulose thickener, 1 part of sodium polyacrylate, 7 parts of barium sulfate, 8 parts of talcum powder, 6 parts of carbon black, 5 parts of aluminum powder and 13 parts of water.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding carbon black, aluminum powder, barium sulfate and talcum powder into AKN-2076 dispersing agent, stirring and grinding to obtain a pigment filler dispersion liquid intermediate;
(2) adding aqueous organosilicon emulsion, aqueous polyurethane-polyacrylic acid emulsion, aqueous acrylic acid flatting agent, aqueous fluorine-silicon resin, hydrophobic modified cellulose thickener, sodium polyacrylate and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organosilicon coating.
Example 4
The water-based organic silicon coating comprises the following components in parts by weight: 60 parts of water-based organic silicon resin emulsion, 7 parts of water-based polyurethane-polyacrylic acid emulsion, 2 parts of water-based acrylic flatting agent, 2 parts of water-based fluorosilicone resin, 0.7 part of AKN-2076 dispersant, 2 parts of hydrophobic modified cellulose thickener, 1 part of sodium polyacrylate, 10 parts of barium sulfate, 20 parts of talcum powder, 8 parts of carbon black, 8 parts of aluminum powder and 16 parts of water.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding carbon black, aluminum powder, barium sulfate and talcum powder into AKN-2076 dispersing agent, stirring and grinding to obtain a pigment filler dispersion liquid intermediate;
(2) adding aqueous organosilicon emulsion, aqueous polyurethane-polyacrylic acid emulsion, aqueous acrylic acid flatting agent, aqueous fluorine-silicon resin, hydrophobic modified cellulose thickener, sodium polyacrylate and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organosilicon coating.
Comparative example 1
The water-based organic silicon coating comprises the following components in parts by weight: 50 parts of organic silicon resin, 2 parts of water-based acrylic acid leveling agent, 1 part of water-based fluorosilicone resin, 0.5 part of AKN-2076 dispersant, 1 part of hydrophobic modified cellulose thickener, 1 part of sodium polyacrylate, 7 parts of barium sulfate, 8 parts of talcum powder, 6 parts of carbon black, 5 parts of aluminum powder and 13 parts of water.
A preparation method of a water-based organic silicon coating comprises the following steps:
(1) adding carbon black, aluminum powder, barium sulfate and talcum powder into AKN-2076 dispersing agent, stirring and grinding to obtain a pigment filler dispersion liquid intermediate;
(2) adding organic silicon resin, an acrylic acid leveling agent, water-based fluorosilicone resin, a hydrophobic modified cellulose thickener, sodium polyacrylate and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the water-based organic silicon coating.
Technical indexes of the water-based silicone coatings prepared in examples 1 to 4 and comparative example 1 are detected, and a commercially available solvent-based silicone resin coating with heat resistance of 300-400 ℃ is used as a comparative example 2 for testing, wherein the viscosity is tested according to GB/T1723, the adhesion is tested according to GB/T9286, the heat resistance is tested according to GB/T1735, the acid and alkali resistance is tested according to GB/T9274, and the salt spray resistance is tested according to GB/T1771, and the test results are shown in Table 1:
and (4) conclusion: the water-based organic silicon high-temperature-resistant anticorrosive coating has the following advantages: the environment-friendly, healthy and safe organic volatile compound (VOC) is extremely low in product content, is a representative environment-friendly and non-toxic product in the current market, and has high social benefit. The water-based organic silicon high-temperature resistant coating prepared by the invention has good heat resistance, does not crack and fall off at 250-300 ℃; the acid and alkali corrosion resistance and the salt spray resistance are good.
Claims (9)
1. The water-based organic silicon coating is characterized by comprising the following components in parts by weight: 40-75 parts of water-based organic silicon emulsion, 2-10 parts of water-based polyurethane-polyacrylic acid emulsion, 0.5-2 parts of flatting agent, 0.2-1 part of dispersing agent, 0.5-5 parts of thickening agent, 5-25 parts of filler, 5-20 parts of pigment and 5-25 parts of water.
2. The water-based organic silicon coating material as claimed in claim 1, wherein the water-based organic silicon emulsion is prepared by the following method: dispersing organic silicon resin and fatty alcohol-polyoxyethylene ether in a dispersing machine at 60-80 ℃, stirring in a stirring machine with the speed of 5000-10000 r/min, and dripping water for 1.5-2h to obtain the water-based organic silicon emulsion.
3. The water-based silicone coating according to claim 1, wherein the leveling agent is at least one selected from a water-based acrylic leveling agent, a water-based fluorosilicone resin, an aryl-modified polysiloxane, a polyether polyester-modified organosiloxane, and an alkyl-modified organosiloxane.
4. The aqueous silicone coating according to claim 1, wherein the filler is at least one selected from the group consisting of barium sulfate, talc, and bentonite.
5. The water-based silicone coating according to claim 1, wherein the pigment is selected from at least one of carbon black or aluminum powder.
6. The aqueous silicone coating of claim 1, wherein the dispersant is selected from the group consisting essentially of AKN-2076 dispersants.
7. The aqueous silicone coating according to claim 1, wherein the thickener is at least one of a hydrophobically modified cellulose-based thickener, sodium polyacrylate, and an associative polyurethane thickener.
8. The method of producing the aqueous silicone coating material according to any one of claims 1 to 7, characterized by comprising the steps of:
(1) adding the pigment and the filler into a dispersing agent for dispersion, stirring and grinding to obtain a pigment and filler dispersion liquid intermediate;
(2) and adding the aqueous organic silicon emulsion, the flatting agent, the thickening agent and water into the pigment and filler dispersion liquid intermediate, stirring, and filtering to prepare the aqueous organic silicon coating.
9. The method as claimed in claim 8, wherein the rotation speed of the stirring in step (1) is 500-600r/min for 10-20 min.
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| CN116496659A (en) * | 2023-04-28 | 2023-07-28 | 英科卡乐油墨(湖北)有限公司 | High-temperature-resistant water-based ink for cigarette tipping material |
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