CN113292875A - Modified acrylic polysiloxane coating and preparation method thereof - Google Patents
Modified acrylic polysiloxane coating and preparation method thereof Download PDFInfo
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- CN113292875A CN113292875A CN202110547120.3A CN202110547120A CN113292875A CN 113292875 A CN113292875 A CN 113292875A CN 202110547120 A CN202110547120 A CN 202110547120A CN 113292875 A CN113292875 A CN 113292875A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/63—Additives non-macromolecular organic
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a modified acrylic polysiloxane coating and a preparation method thereof, wherein the modified acrylic polysiloxane coating comprises the following raw materials: polysiloxane intermediate, ethoxylated trihydroxymethyl triacrylate, aminopropyl triethoxysilane, tetra-n-butyl titanate, titanium dioxide, talcum powder, dimethyl siloxane, bentonite, pigment and filler, and collar phthalate. According to the invention, the reasonable mixture ratio is adopted, after the cross-linking agent and dimethyl siloxane are added into the paint, the paint has a considerable repelling effect on various dust and liquid stains, the stains slide off from the surface of the paint without leaving any trace, the cleaning capability of the paint is strong, the flexibility and impact resistance of the paint can be effectively improved by the phthalate added into the paint, the use temperature of the product is reduced, the paint is cold-resistant and high-temperature-resistant, and the problems that the dust and stains are easily attached to the exterior wall paint and the paint is easily broken and peeled off by cold wind and sand particles are effectively solved.
Description
Technical Field
The invention relates to the technical field of polysiloxane coating preparation, in particular to a modified acrylic polysiloxane coating and a preparation method thereof.
Background
The acrylic modified polysiloxane coating is an inorganic mixed finish with high performance, double components and high solid content, accords with all the existing VOC regulations, does not contain isocyanate, is a high-grade zero-VOC anticorrosion variety in the leadership of heavy anticorrosion, can effectively maintain color and luster for a long time, has long service life before first maintenance when being used as a part of a high-performance anticorrosion coating system, is designed in the market field with important visual effect and high aesthetic requirement, and comprises high-performance structures such as bridges, offshore mining equipment, storage tank areas and the like and common industrial and commercial steel structures with very critical aesthetic property, has the dual advantages of corrosion resistance and aesthetic property, ensures that the coating has very excellent durability and can also have the barrier effect similar to the traditional epoxy resin intermediate coating, but also can reduce the total number of coating layers in a high-performance multilayer coating system, thereby reducing the coating cost and improving the production efficiency.
When the existing modified acrylic polysiloxane paint is coated on a wall, dust and various stains in the air are easy to adhere to the exterior wall paint, the attractiveness of the paint is affected, the service life of the paint is shortened, and the paint on the exterior wall in cold weather is easy to break and peel off under the impact of cold wind and sand particles.
Therefore, a modified acrylic polysiloxane coating and a preparation method thereof are needed to be designed aiming at the problems.
Disclosure of Invention
The invention aims to provide a modified acrylic polysiloxane coating and a preparation method thereof, which aim to solve the problems that dust and dirt are easily attached to an exterior wall coating and particles of cold wind and sand dust are easily broken and peeled off in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the modified acrylic polysiloxane coating comprises the following main raw materials in percentage by weight: 30-45 parts of polysiloxane intermediate; 15-20 parts of ethoxylated trimethylolpropane triacrylate; 0.5-2.0 parts of aminopropyltriethoxysilane; 1-3 parts of tetrabutyl titanate; 5-10 parts of dibutyltin diacetate according to parts; 45-55 parts of titanium dioxide; 0.5-2.0 parts of bentonite; 4.5-5.5 parts of talcum powder; 5-10 parts of dimethyl siloxane; 0.5-2.0 parts of pigment and filler; 1-5 parts of collar phthalic acid ester;
the required additives are: leveling agent, dispersing agent, defoaming agent, stabilizing agent and cross-linking agent.
Preferably, the mass ratio of the titanium dioxide to the bentonite to the pigment to the filler is 90: 1: 1, the color filler changes the color of the modified acrylic polysiloxane coating, and the ethoxylated trimethylol triacrylate serves as a reactive diluent.
Preferably, the molecular main chain of the polysiloxane intermediate is of a Si-O-Si structure, the inorganic property of the polysiloxane intermediate mainly endows the coating with excellent performances such as corrosion resistance, weather resistance, temperature resistance and the like, the molecular structure of the polysiloxane intermediate contains a plurality of alkoxy (hydroxyl) active functional groups, and the alkoxy in the polysiloxane intermediate and the alkoxy in the curing agent are subjected to a crosslinking reaction in the presence of moisture to form a compact coating film.
Preferably, the aminopropyltriethoxysilane is used as a coupling agent to increase the cohesiveness of the coating, and the tetrabutyl titanate is an organic compound to improve the heat resistance of the coating.
Preferably, the talc is used to improve the paint precipitability, mechanical force of coating film and recoatability, and the mesh number of the talc is 1250 mesh.
Preferably, the mass ratio of the polysiloxane intermediate to the ethoxylated trimethylol triacrylate resin is 2: when 1, the overall performance of the coating is best.
Preferably, the aminosilane is used as a curing agent of acrylic polysiloxane coating, wherein amino groups and unsaturated double bonds of acrylic resin are subjected to addition reaction, and active alkoxy groups or hydroxyl groups in polysiloxane intermediate can be subjected to hydrolytic polycondensation reaction with Si-O-R of the curing agent, so that a compact coating system is formed.
Preferably, the dimethyl siloxane has excellent chemical shielding capability, can protect the paint matrix from being damaged under severe chemical conditions, and the phthalate can reduce the viscosity of the paint polymer, improve the processability and the dispersibility of the mixture, shorten the dispersion time, increase the compatibility of the polymer and an additive when mixed, reduce the using temperature of the paint while increasing the flexibility of the paint, and enable the paint to be used at low temperature.
Preferably, the production steps of the modified acrylic polysiloxane coating are as follows:
step 1:
firstly, adding 30 parts of polysiloxane intermediate into a grinding tank, and sequentially adding 45 parts of titanium dioxide, 15 parts of ethoxylated trimethylolpropane triacrylate, 4.5 parts of talcum powder, 0.5 part of bentonite, 5 parts of dibutyltin diacetate and a mixture of the components in a mass ratio of 1-3:5-8: 0.05-0.1: 0.5:1 of wetting dispersant, pigment filler, defoamer, stabilizer and flatting agent, uniformly stirring, grinding by a sand mill until the fineness is less than or equal to 20 mu m, then adding ultraviolet absorbent, uniformly mixing, and filtering to obtain a component A;
step 2:
0.5 part of aminopropyltriethoxysilane and 1 part of tetrabutyl titanate are put into a stirrer and uniformly stirred at a low speed of 300r/min for 20-30min at 250-;
and step 3:
placing the component A and the component B into a stirrer, stirring and dispersing at a high speed of 1500 plus materials and 2500r/min for 10-20min to obtain a modified acrylic polysiloxane coating, adding a cross-linking agent into the modified acrylic polysiloxane coating, mixing at a high speed, adding 5 parts of dimethyl siloxane into the mixed coating, and uniformly stirring at a low speed of 300 plus materials and 600r/min for 30 min;
and 4, step 4:
adding 1 part of phthalate and stabilizer into the mixed coating, uniformly stirring at a low speed of 250-300r/min for 60min, heating the mixed coating in water bath at a constant temperature of 60 ℃, and cooling the coating to obtain the modified acrylic polysiloxane coating.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the reasonable mixture ratio is adopted, after the cross-linking agent and dimethyl siloxane are added into the paint, the paint has a considerable repelling effect on various dust and liquid stains, the stains slide off from the surface of the paint without leaving any trace, the cleaning capability of the paint is strong, the flexibility and impact resistance of the paint can be effectively improved by the phthalate added into the paint, the use temperature of the product is reduced, the paint is cold-resistant and high-temperature-resistant, and the problems that the dust and stains are easily attached to the exterior wall paint and the paint is easily broken and peeled off by cold wind and sand particles are effectively solved.
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.
The invention provides a technical scheme that:
example 1:
step 1:
firstly, adding 35 parts of polysiloxane intermediate into a grinding tank, and sequentially adding 50 parts of titanium dioxide, 17 parts of ethoxylated trimethylolpropane triacrylate, 5 parts of talcum powder, 1 part of bentonite, 7 parts of dibutyltin diacetate and a mixture of the components in a mass ratio of 1-3:5-8: 0.05-0.1: 0.5:1 of wetting dispersant, pigment filler, defoamer, stabilizer and flatting agent, uniformly stirring, grinding by a sand mill until the fineness is less than or equal to 20 mu m, then adding ultraviolet absorbent, uniformly mixing, and filtering to obtain a component A;
step 2:
1 part of aminopropyltriethoxysilane and 2 parts of tetrabutyl titanate are put into a stirrer and are uniformly stirred for 20-30min at a low speed of 300r/min and 250-;
and step 3:
placing the component A and the component B into a stirrer, stirring and dispersing at a high speed of 1500-;
and 4, step 4:
adding 3 parts of phthalic acid ester and a stabilizer into the mixed coating, uniformly stirring at a low speed of 250-300r/min for 60min, simultaneously heating the mixed coating in water bath at a constant temperature of 60 ℃, and cooling the coating to obtain the modified acrylic polysiloxane coating.
Example 2:
step 1:
firstly, adding 45 parts of polysiloxane intermediate into a grinding tank, and sequentially adding 55 parts of titanium dioxide, 20 parts of ethoxylated trimethylolpropane triacrylate, 5.5 parts of talcum powder, 2 parts of bentonite, 10 parts of dibutyltin diacetate and a mixture of the components in a mass ratio of 1-3:5-8: 0.05-0.1: 0.5:1 of wetting dispersant, pigment filler, defoamer, stabilizer and flatting agent, uniformly stirring, grinding by a sand mill until the fineness is less than or equal to 20 mu m, then adding ultraviolet absorbent, uniformly mixing, and filtering to obtain a component A;
step 2:
0.5 part of aminopropyltriethoxysilane and 1 part of tetrabutyl titanate are put into a stirrer and uniformly stirred at a low speed of 300r/min for 20-30min at 250-;
and step 3:
placing the component A and the component B into a stirrer, stirring and dispersing at a high speed of 1500 plus materials and 2500r/min for 10-20min to obtain a modified acrylic polysiloxane coating, adding a cross-linking agent into the modified acrylic polysiloxane coating, mixing at a high speed, adding 5 parts of dimethyl siloxane into the mixed coating, and uniformly stirring at a low speed of 300 plus materials and 600r/min for 30 min;
and 4, step 4:
adding 1 part of phthalate and stabilizer into the mixed coating, uniformly stirring at a low speed of 250-300r/min for 60min, heating the mixed coating in water bath at a constant temperature of 60 ℃, and cooling the coating to obtain the modified acrylic polysiloxane coating.
Example 3:
step 1:
firstly, adding 30 parts of polysiloxane intermediate into a grinding tank, and sequentially adding 45 parts of titanium dioxide, 15 parts of ethoxylated trimethylolpropane triacrylate, 4.5 parts of talcum powder, 0.5 part of bentonite, 5 parts of dibutyltin diacetate and a mixture of the components in a mass ratio of 1-3:5-8: 0.05-0.1: 0.5:1 of wetting dispersant, pigment filler, defoamer, stabilizer and flatting agent, uniformly stirring, grinding by a sand mill until the fineness is less than or equal to 20 mu m, then adding ultraviolet absorbent, uniformly mixing, and filtering to obtain a component A;
step 2:
2 parts of aminopropyltriethoxysilane and 3 parts of tetrabutyl titanate are put into a stirrer and are uniformly stirred for 20-30min at a low speed of 300r/min for 250-;
and step 3:
placing the component A and the component B into a stirrer, stirring and dispersing at a high speed of 1500-;
and 4, step 4:
adding 5 parts of phthalic acid ester and a stabilizer into the mixed coating, uniformly stirring at a low speed of 250-300r/min for 60min, simultaneously heating the mixed coating in a water bath at a constant temperature of 60 ℃, and cooling the coating to obtain the modified acrylic polysiloxane coating.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A modified acrylic polysiloxane coating is characterized in that: according to the weight percentage, the modified acrylic polysiloxane paint comprises the following main raw materials: 30-45 parts of polysiloxane intermediate; 15-20 parts of ethoxylated trimethylolpropane triacrylate; 0.5-2.0 parts of aminopropyltriethoxysilane; 1-3 parts of tetrabutyl titanate; 5-10 parts of dibutyltin diacetate according to parts; 45-55 parts of titanium dioxide; 0.5-2.0 parts of bentonite; 4.5-5.5 parts of talcum powder; 5-10 parts of dimethyl siloxane; 0.5-2.0 parts of pigment and filler; 1-5 parts of collar phthalic acid ester;
the required additives are: leveling agent, dispersing agent, defoaming agent, stabilizing agent and cross-linking agent.
2. The modified acrylic polysiloxane coating of claim 1, wherein: the mass ratio of the titanium dioxide to the bentonite to the pigment filler is 90: 1: 1, the color filler changes the color of the modified acrylic polysiloxane coating, and the ethoxylated trimethylol triacrylate serves as a reactive diluent.
3. The modified acrylic polysiloxane coating of claim 1, wherein: the molecular main chain of the polysiloxane intermediate is of a Si-O-Si structure, the inorganic characteristic of the polysiloxane intermediate mainly endows the coating with excellent performances of corrosion resistance, weather resistance, temperature resistance and the like, the molecular structure of the polysiloxane intermediate contains more alkoxy (hydroxyl) active functional groups, and the alkoxy in the polysiloxane intermediate and the alkoxy in the curing agent are subjected to a crosslinking reaction in the presence of moisture to form a compact coating.
4. The modified acrylic polysiloxane coating of claim 1, wherein: the aminopropyltriethoxysilane is used as a coupling agent to increase the cohesiveness of the coating, and the tetrabutyl titanate is an organic compound to improve the heat resistance of the coating.
5. The modified acrylic polysiloxane coating of claim 1, wherein: the talc is used to improve the paint precipitability, mechanical force of coating film and recoatability, and the mesh number of the talc is 1250 mesh.
6. The modified acrylic polysiloxane coating of claim 1, wherein: the mass ratio of the polysiloxane intermediate to the ethoxylated trimethylol triacrylate resin is 2: when 1, the overall performance of the coating is best.
7. The modified acrylic polysiloxane coating of claim 1, wherein: the amino silane is used as a curing agent of the acrylic polysiloxane coating, wherein amino groups and unsaturated double bonds of acrylic resin are subjected to addition reaction, and simultaneously, active alkoxy or hydroxyl in a polysiloxane intermediate can be subjected to hydrolytic polycondensation reaction with Si-O-R of the curing agent, so that a compact coating system is formed.
8. The modified acrylic polysiloxane coating of claim 1, wherein: the dimethyl siloxane has excellent chemical shielding capacity, can protect a coating substrate from being damaged under severe chemical conditions, and the phthalate can reduce the viscosity of a coating polymer, improve the processability and the dispersibility of a mixture, shorten the dispersion time, increase the compatibility of the polymer and an additive during mixing, reduce the use temperature of the coating while increasing the flexibility of the coating, so that the coating can be used at a low temperature.
9. The method for preparing a modified acrylic polysiloxane coating according to claim 1, wherein: the production steps of the modified acrylic polysiloxane coating are as follows:
step 1:
firstly, adding 30 parts of polysiloxane intermediate into a grinding tank, and sequentially adding 45 parts of titanium dioxide, 15 parts of ethoxylated trimethylolpropane triacrylate, 4.5 parts of talcum powder, 0.5 part of bentonite, 5 parts of dibutyltin diacetate and a mixture of the components in a mass ratio of 1-3:5-8: 0.05-0.1: 0.5:1 of wetting dispersant, pigment filler, defoamer, stabilizer and flatting agent, uniformly stirring, grinding by a sand mill until the fineness is less than or equal to 20 mu m, then adding ultraviolet absorbent, uniformly mixing, and filtering to obtain a component A;
step 2:
0.5 part of aminopropyltriethoxysilane and 1 part of tetrabutyl titanate are put into a stirrer and uniformly stirred at a low speed of 300r/min for 20-30min at 250-;
and step 3:
placing the component A and the component B into a stirrer, stirring and dispersing at a high speed of 1500 plus materials and 2500r/min for 10-20min to obtain a modified acrylic polysiloxane coating, adding a cross-linking agent into the modified acrylic polysiloxane coating, mixing at a high speed, adding 5 parts of dimethyl siloxane into the mixed coating, and uniformly stirring at a low speed of 300 plus materials and 600r/min for 30 min;
and 4, step 4:
adding 1 part of phthalate and stabilizer into the mixed coating, uniformly stirring at a low speed of 250-300r/min for 60min, heating the mixed coating in water bath at a constant temperature of 60 ℃, and cooling the coating to obtain the modified acrylic polysiloxane coating.
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| CN202110547120.3A CN113292875A (en) | 2021-05-19 | 2021-05-19 | Modified acrylic polysiloxane coating and preparation method thereof |
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Cited By (1)
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| CN113817349A (en) * | 2021-11-02 | 2021-12-21 | 河南三棵树新材料科技有限公司 | Acrylic acid modified polysiloxane coating and preparation method thereof |
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