CN113717603B - Modified fluorocarbon anticorrosive paint and preparation method thereof - Google Patents
Modified fluorocarbon anticorrosive paint and preparation method thereof Download PDFInfo
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- CN113717603B CN113717603B CN202111182014.6A CN202111182014A CN113717603B CN 113717603 B CN113717603 B CN 113717603B CN 202111182014 A CN202111182014 A CN 202111182014A CN 113717603 B CN113717603 B CN 113717603B
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D133/16—Homopolymers or copolymers of esters containing halogen atoms
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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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a modified fluorocarbon anticorrosive paint and a preparation method thereof, wherein the modified fluorocarbon anticorrosive paint comprises the following components in parts by weight: modified fluorocarbon resin: 10-80 parts; nano silicon dioxide: 1-15 parts; aerogel: 1-10 parts; pigment: 0-10 parts; filling: 0-40 parts; auxiliary agent: 1-5 parts; solvent: 15-50 parts of a solvent; curing agent: 2-40 parts. The invention provides a modified fluorocarbon anticorrosive paint and a preparation method thereof, and the prepared fluorocarbon anticorrosive paint has better hydrophobicity, higher hardness, heat resistance, better anticorrosive property and artificial climate aging resistance, further expands the application of the fluorocarbon anticorrosive paint in ocean engineering, and improves the technical level of ocean anticorrosive paint in China.
Description
Technical Field
The invention relates to the technical field of anticorrosive coatings, in particular to a modified fluorocarbon anticorrosive coating and a preparation method thereof.
Background
The fluorocarbon anticorrosive paint is an anticorrosive paint using fluorocarbon resin as a main film forming substance. Because the carbon chain structure in the molecular structure of the fluorocarbon resin is tightly wrapped by fluorine atoms to form a spiral three-dimensional arrangement conformation, the integrity and the compactness of the structure are ensured to the maximum extent, the penetration of a plurality of liquids and gases to a paint film is prevented, and the decomposition and the damage of the carbon chain under the action of ultraviolet light and heat are avoided, so that the fluorocarbon anticorrosive coating has excellent waterproof and oleophobic effects and excellent aging resistance and corrosion resistance, and is widely applied to the corrosion resistance of the surfaces of various steel structures and concrete structures. However, in the face of multiple complex environmental factors such as heavy corrosion of marine environment, mechanical impact of sea waves, insolation, damp heat, salt erosion and the like, the adhesion, hardness, antifouling and self-cleaning properties of the fluorocarbon anticorrosive coating are still slightly insufficient, the service life of the material is difficult to meet the actual requirements, and an effective method for further improving the mechanical properties of the fluorocarbon anticorrosive coating, improving the comprehensive performance of the fluorocarbon anticorrosive coating and prolonging the service life is urgently needed.
Disclosure of Invention
In view of the above, the invention discloses a modified fluorocarbon anticorrosive coating and a preparation method thereof, so as to improve the comprehensive performance of the fluorocarbon anticorrosive coating and prolong the service life.
The technical scheme provided by the invention is that the modified fluorocarbon anticorrosive paint comprises the following components in parts by weight:
preferably, the modified fluorocarbon resin is one or a mixture of hydrogenated rosin modified fluorocarbon resin and acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin.
Preferably, the molecular structure of the hydrogenated rosin modified fluorocarbon resin is a main chain structure, the side group connected with the main chain carbon atom is composed of fluorine atom, hydroxyl, hydrogenated rosin ester group, and/or one or more of chlorine atom, hydrogen atom, alkyl group, alkoxy group, carboxyl group and ester group, wherein the following elements account for the mass percentage of the resin: 1 to 55 percent of fluorine atoms; 0.5 to 15 percent of hydroxyl; 1 to 35 percent of hydrogenated rosin ester group;
the hydrogenated rosin modified fluorocarbon resin is prepared by reacting hydrogenated rosin resin with an acylating reagent to generate acyl-chlorinated hydrogenated rosin, and then reacting with hydroxyl in polyhydroxy fluorocarbon resin.
Preferably, the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin takes a carbon chain as a main chain structure, and the side group connected with a main chain carbon atom is formed by one or more of a hydrogenated rosin alcohol ester group, a fluoroalkyl ester group, a hydroxyl group or an alkyl hydroxyl group, and/or a hydrogen atom, an alkyl group, an alkoxy group, a carboxyl group and an ester group; the resin comprises the following elements in percentage by mass: 1 to 35 percent of fluorine atoms; 0.5 to 10 percent of hydroxyl; 1 to 25 percent of hydrogenated rosin alcohol ester group;
the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin is prepared by reacting hydrogenated rosin alcohol with acryloyl chloride or methacryloyl chloride to synthesize acrylic acid hydrogenated rosin alcohol ester, and then carrying out free radical copolymerization on the acrylic acid hydrogenated rosin alcohol ester, acrylic acid hydroxy ester, fluorine-containing acrylate resin, acrylic acid and acrylate.
Preferably, the pigment is an ultraweatherable pigment.
Preferably, the filler is one or a mixture of more of titanium dioxide, barium sulfate, quartz powder, mica powder, talcum powder, diatomite, calcium carbonate and bentonite.
Preferably, the auxiliary agent is one or a mixture of more of an antioxidant, an ultraviolet absorber, a leveling agent, a dispersing agent, a coupling agent and a defoaming agent.
Preferably, the solvent is one or more of toluene, tetrahydrofuran, ethyl acetate, butyl acetate, petroleum ether, dichloromethane, trichloromethane and carbon tetrachloride.
Preferably, the curing agent is an aliphatic isocyanate.
On the other hand, the invention provides a method for preparing the modified fluorocarbon anticorrosive paint, which comprises the following steps:
step 1: fully and uniformly mixing the modified fluorocarbon resin with a solvent to obtain a modified fluorocarbon resin solution;
step 2: mixing 10-50% of the modified fluorocarbon resin solution with an auxiliary agent according to the mass percentage, adding nano silicon dioxide into the mixture, and carrying out ball milling and mixing for 0.5-2 h in a ball mill;
and step 3: continuously adding the filler into the ball mill, and carrying out ball milling and mixing for 0.5-6 h; then, sequentially adding aerogel and pigment, and performing ball milling and mixing for 0.5h to obtain prefabricated mixed slurry;
and 4, step 4: conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated slurry meets the requirement of a product for later use;
and 5: filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the remaining 50-90% of modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint;
step 6: and (3) uniformly mixing the resin component of the anticorrosive coating with the curing agent to obtain the modified fluorocarbon anticorrosive coating.
The invention provides a modified fluorocarbon anticorrosive paint and a preparation method thereof, and the prepared fluorocarbon anticorrosive paint has better hydrophobicity, higher hardness and heat resistance, more excellent anticorrosive performance and artificial climate aging resistance, further expands the application of the fluorocarbon anticorrosive paint in ocean engineering, and improves the technical level of the ocean anticorrosive paint in China.
In the preparation method, the modified fluorocarbon resin with the hydrogenated abietate side group and the hydrogenated abietate side group is introduced as a modified resin raw material, and the modified fluorocarbon resin has larger cycloalkyl steric hindrance, is beneficial to improving the hardness, hydrophobicity and heat resistance of the material after film formation and protects the main chain carbon chain; the aerogel added into the raw materials further improves the hydrophobicity and temperature change resistance of the coating, so that the prepared modified fluorocarbon anticorrosive coating has better hydrophobicity, higher hardness and heat resistance, and excellent anticorrosive performance and artificial weather aging resistance.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Detailed Description
The exemplary embodiments will be described herein in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of systems consistent with certain aspects of the invention, as detailed in the appended claims.
In order to solve the problems that the adhesion, hardness and antifouling self-cleaning performance of the fluorocarbon anticorrosive coating in the prior art are still slightly insufficient, the service life of the material is difficult to meet the actual requirements, and the like, the embodiment provides a modified fluorocarbon anticorrosive coating, which comprises modified fluorocarbon resin, a curing agent, aerogel, nano silicon dioxide, a pigment, a filler, an auxiliary agent and a solvent, wherein the components are calculated according to the parts by mass as follows:
preferably, the modified fluorocarbon resin is one or a mixture of polyhydroxy fluorocarbon resin and hydrogenated rosin modified fluorocarbon resin or acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin;
the molecular structure of the hydrogenated rosin modified fluorocarbon resin is a main chain structure, and the side group connected with the main chain carbon atom consists of fluorine atoms, hydroxyl groups, hydrogenated rosin ester groups and/or one or more of chlorine atoms, hydrogen atoms, alkyl groups, alkoxy groups, carboxyl groups and ester groups, wherein the mass percentage of the fluorine atoms is 1-55%; the mass percentage content of the hydroxyl is 0.5-15%; the mass percentage content of the hydrogenated rosin ester group is 1-35 percent;
the hydrogenated rosin modified fluorocarbon resin is prepared by reacting hydrogenated rosin resin with an acylating reagent to generate acyl-chlorinated hydrogenated rosin, and then reacting with hydroxyl in polyhydroxy fluorocarbon resin.
The preferred specific preparation method is as follows: grinding 100g of formal AX-E perhydrogenated rosin in a grinder to prepare powdered hydrogenated rosin for later use; dissolving 30g of powdered Foral AX-E perhydrogenated rosin in dichloromethane to prepare a solution with the mass concentration of 50%; adding 7.3g of N, N-dimethylformamide into the solution, uniformly mixing, slowly adding 13g of thionyl chloride by using a constant-pressure dropping funnel at the temperature of 23 ℃, after dropwise addition, carrying out reflux reaction for 2 hours, finishing the reaction, and distilling and separating to remove the redundant thionyl chloride to obtain the acyl-chlorinated hydrogenated rosin solution. Dissolving 1kg of hydroxy fluorocarbon resin with hydroxyl value of 56 and fluorine content of 20% in dichloromethane solvent to prepare a solution with mass concentration of 50%, adding 10g of triethylamine, uniformly mixing, then slowly dropwise adding the prepared acyl chloride hydrogenated rosin solution, refluxing at room temperature for 8h, finishing the reaction, washing with deionized water to be neutral, and distilling and refining to obtain the hydrogenated rosin modified fluorocarbon resin with the side chain containing hydrogenated rosin ester groups, wherein the mass percentage of hydroxyl groups is 1.5%, the mass percentage of fluorine atoms is 19%, and the mass percentage of hydrogenated rosin ester groups is 3%.
The acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin is of a main chain structure, and the side group connected with a main chain carbon atom is formed by one or more of hydrogenated rosin alcohol ester group, fluoroalkyl ester group, hydroxyl or alkyl hydroxyl, and/or hydrogen atom, alkyl, alkoxy, carboxyl and ester group; wherein the mass percentage of fluorine atoms is 1-35%; the mass percentage of the hydroxyl is 0.5-10%; the mass percentage content of the hydrogenated rosin alcohol ester group is 1 to 25 percent;
the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin is prepared by reacting hydrogenated rosin alcohol with acryloyl chloride or methacryloyl chloride to synthesize acrylic acid hydrogenated rosin alcohol ester, and then carrying out free radical copolymerization on the acrylic acid hydrogenated rosin alcohol ester, acrylic acid hydroxy ester, fluorine-containing acrylate resin, acrylic acid and acrylate.
Preferably, the preparation method of the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin comprises the following steps:
step 1: dissolving hydrogenated rosin alcohol in dichloromethane to prepare a solution with the mass concentration of 65%;
step 2: adding triethylamine accounting for 32% of the mass of the hydrogenated rosin alcohol and 0.2% of p-hydroxyanisole into the hydrogenated rosin alcohol solution, uniformly mixing, slowly adding acryloyl chloride accounting for 28% of the mass of the hydrogenated rosin alcohol at 45 ℃, after dropwise adding, performing reflux reaction for 6 hours, finishing the reaction, separating and removing precipitates, washing the precipitates to be neutral by using deionized water, and performing vacuum extraction to remove a solvent to obtain acrylic acid hydrogenated rosin alcohol ester;
and step 3: adding 30 mass percent of ethyl acetate/toluene mixed solvent with the volume ratio of 2:1, 30 mass percent of dodecafluoroheptyl methacrylate, 10 mass percent of hydroxybutyl acrylate, 8.5 mass percent of methacrylic acid, 1 mass percent of dibenzoyl peroxide and 0.5 mass percent of dodecyl mercaptan into 20 mass percent of acrylic acid hydrogenated rosin alcohol ester, and uniformly mixing to prepare a reaction solution;
and 4, step 4: taking 15% of the reaction solution, carrying out reflux reaction for 0.5h at the temperature of 95 ℃, continuously and slowly dripping the residual reaction solution into the reaction system, finishing dripping within 5h, keeping the temperature for 2h after finishing dripping, stopping heating, cooling to room temperature, and discharging to obtain acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin;
the pigment is an ultra-weather-resistant pigment;
one or more mixtures of the fillers of titanium dioxide, barium sulfate, quartz powder, mica powder, talcum powder, diatomite, calcium carbonate and bentonite;
the auxiliary agent is one or a mixture of more of an antioxidant, an ultraviolet absorbent, a leveling agent, a dispersing agent, a coupling agent and a defoaming agent;
the solvent is one or more of toluene, tetrahydrofuran, ethyl acetate, butyl acetate, petroleum ether, dichloromethane, trichloromethane and carbon tetrachloride;
the curing agent is aliphatic isocyanate, preferably hexamethylene diisocyanate, isophorone diisocyanate, and cyclohexylmethane-4, 4' -diisocyanate;
on the other hand, the embodiment provides a preparation method of the modified fluorocarbon anticorrosive paint, which comprises the following steps:
step 1: fully and uniformly mixing the modified fluorocarbon resin with a solvent to obtain a modified fluorocarbon resin solution;
step 2: mixing 10-50% of the modified fluorocarbon resin solution with an auxiliary agent, adding nano silicon dioxide, and ball-milling and mixing for 0.5-2 h in a ball mill;
and 3, step 3: adding the filler into a ball mill, and continuously performing ball milling and mixing for 0.5 to 6 hours; then, continuously and sequentially adding aerogel and pigment, and performing ball milling and mixing for 0.5h to obtain prefabricated mixed slurry;
and 4, step 4: conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated slurry meets the requirement of a product for later use;
and 5: filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the remaining 90-50% of modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint;
step 6: when in use, the resin component of the anticorrosive paint is uniformly mixed with the curing agent to obtain the modified fluorocarbon anticorrosive paint.
The present invention will be further illustrated by the following examples, but the present invention is not limited to these examples.
Example 1
Uniformly mixing 30 parts by weight of polyhydroxy fluorocarbon resin, 10 parts by weight of hydrogenated rosin modified fluorocarbon resin and 10 parts by weight of acrylic acid hydrogenated rosin alcohol ester to obtain 50 parts by weight of modified fluorocarbon resin, adding 10 parts by weight of toluene and 30 parts by weight of butyl acetate into the modified fluorocarbon resin, and uniformly mixing the modified fluorocarbon resin with the modified fluorocarbon resin to obtain a modified fluorocarbon resin solution; mixing 20% of the modified fluorocarbon resin solution with 1 part of KH792 silane coupling agent, adding 5 parts of nano silicon dioxide, and ball-milling in a ball mill for 1 h; adding 5 parts of titanium dioxide and 5 parts of calcium carbonate into a ball mill, and continuing ball milling and mixing for 2 hours; then, continuously and sequentially adding 3 parts of aerogel and 1 part of weather-resistant inorganic pigment, and performing ball milling and mixing for 0.5h to obtain prefabricated mixed slurry; conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated slurry is less than 25um for later use; filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the residual 80% of modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint; when in use, the resin component of the anticorrosive paint is uniformly mixed with the hexamethylene diisocyanate curing agent to obtain the modified fluorocarbon anticorrosive paint.
Referring to the chemical industry standard HG/T3792-.
Example 2
Uniformly mixing 30 parts of polyhydroxy fluorocarbon resin and 30 parts of hydrogenated rosin modified fluorocarbon resin to obtain 60 parts of modified fluorocarbon resin, adding 50 parts of ethyl acetate, and uniformly mixing with the modified fluorocarbon resin to obtain a modified fluorocarbon resin solution; mixing 10% of the modified fluorocarbon resin solution with 1 part of KH550 silane coupling agent, 2 parts of dispersing agent and 1 part of defoaming agent, adding 3 parts of nano silicon dioxide, and ball-milling and mixing for 0.5h in a ball mill; adding 3 parts of calcium carbonate and 5 parts of bentonite into a ball mill, and continuously ball-milling and mixing for 2 hours; then, continuously and sequentially adding 1 part of aerogel and 5 parts of weather-resistant gray inorganic pigment, and performing ball milling and mixing for 1h to obtain prefabricated mixed slurry; conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated slurry is less than 25um for later use; filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the residual 90% of the modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint; when in use, the resin component of the anticorrosive paint is uniformly mixed with the isophorone diisocyanate curing agent to obtain the modified fluorocarbon anticorrosive paint.
Referring to the chemical industry standard HG/T3792-.
Example 3
Uniformly mixing 20 parts of polyhydroxy fluorocarbon resin and 20 parts of acrylic acid hydrogenated rosin alcohol ester to obtain 40 parts of modified fluorocarbon resin, adding 25 parts of ethyl acetate and 5 parts of dichloromethane, and uniformly mixing with the modified fluorocarbon resin to obtain a modified fluorocarbon resin solution; mixing 50% of the modified fluorocarbon resin solution with 2 parts of KH570 silane coupling agent, 0.5 part of ultraviolet absorbent, 1 part of dispersant, 0.5 part of defoamer and 1 part of flatting agent, adding 10 parts of nano-silica, and ball-milling and mixing for 2 hours in a ball mill; adding 15 parts of titanium dioxide and 10 parts of calcium carbonate into a ball mill, and continuing ball milling and mixing for 2 hours; then, continuously and sequentially adding 2 parts of aerogel, and carrying out ball milling and mixing for 2 hours to obtain prefabricated mixed slurry; conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated slurry is less than 25um for later use; filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the remaining 50% of the modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint; when in use, the resin component of the anticorrosive paint is uniformly mixed with the cyclohexylmethane-4, 4' -diisocyanate curing agent to obtain the modified fluorocarbon anticorrosive paint.
Referring to the chemical industry standard HG/T3792-.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (7)
1. The modified fluorocarbon anticorrosive paint is characterized by comprising the following components in parts by weight:
modified fluorocarbon resin: 10 to 80 portions of
Nano silicon dioxide: 1 to 15 portions of
Aerogel: 1 to 10 parts of
Pigment: 0 to 10 parts of
Filling: 0 to 40 parts of
Auxiliary agent: 1 to 5 portions of
Solvent: 15 to 50 portions of
Curing agent: 2-40 parts;
the modified fluorocarbon resin is one or a mixture of hydrogenated rosin modified fluorocarbon resin and acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin;
the molecular structure of the hydrogenated rosin modified fluorocarbon resin takes a carbon chain as a main chain structure, and a side group connected with the main chain carbon atom consists of fluorine atoms, hydroxyl groups, hydrogenated rosin ester groups and/or one or more of chlorine atoms, hydrogen atoms, alkyl groups, alkoxy groups, carboxyl groups and ester groups, wherein the hydrogenated rosin modified fluorocarbon resin comprises the following elements in percentage by mass: 1 to 55 percent of fluorine atoms; 0.5 to 15 percent of hydroxyl; 1 to 35 percent of hydrogenated abietate;
the hydrogenated rosin modified fluorocarbon resin is prepared by reacting hydrogenated rosin resin with an acylating reagent to generate acyl-chlorinated hydrogenated rosin, and then reacting with hydroxyl in polyhydroxy fluorocarbon resin;
the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin takes a carbon chain as a main chain structure, and a side group connected with a main chain carbon atom consists of hydrogenated rosin alcohol ester, fluoroalkyl ester, hydroxyl or alkyl hydroxyl and/or one or more of hydrogen atom, alkyl, alkoxy, carboxyl and ester; the resin comprises the following elements in percentage by mass: 1 to 35 percent of fluorine atoms; 0.5 to 10 percent of hydroxyl; 1 to 25 percent of hydrogenated rosin alcohol ester group;
the acrylic acid hydrogenated rosin alcohol ester modified fluorocarbon resin is prepared by reacting hydrogenated rosin alcohol with acryloyl chloride or methacryloyl chloride to synthesize acrylic acid hydrogenated rosin alcohol ester, and then carrying out free radical copolymerization on the acrylic acid hydrogenated rosin alcohol ester, acrylic acid hydroxy ester, fluorine-containing acrylate resin, acrylic acid and acrylate.
2. The modified fluorocarbon anticorrosive paint of claim 1, wherein the pigment is an ultra-weatherable pigment.
3. The modified fluorocarbon anticorrosive paint according to claim 1, characterized in that the filler is one or more of titanium dioxide, barium sulfate, quartz powder, mica powder, talc powder, diatomaceous earth, calcium carbonate and bentonite.
4. The modified fluorocarbon anticorrosive paint of claim 1, wherein the auxiliary agent is one or more of an antioxidant, an ultraviolet absorber, a leveling agent, a dispersant, a coupling agent, and a defoaming agent.
5. The modified fluorocarbon anticorrosive paint of claim 1, wherein the solvent is one or more of toluene, tetrahydrofuran, ethyl acetate, butyl acetate, petroleum ether, dichloromethane, chloroform and carbon tetrachloride.
6. The modified fluorocarbon anticorrosive paint of claim 1, wherein the curing agent is aliphatic isocyanate.
7. The method for preparing the modified fluorocarbon anticorrosive paint as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
step 1: fully and uniformly mixing the modified fluorocarbon resin with a solvent to obtain a modified fluorocarbon resin solution;
step 2: mixing 10-50% of the modified fluorocarbon resin solution with an auxiliary agent according to the mass percentage, adding nano silicon dioxide into the mixture, and carrying out ball milling and mixing for 0.5-2 h in a ball mill;
and step 3: continuously adding the filler into the ball mill, and carrying out ball milling and mixing for 0.5-6 h; then, sequentially adding aerogel and pigment, and performing ball milling and mixing for 0.5h to obtain prefabricated mixed slurry;
and 4, step 4: conveying the prefabricated mixed slurry into a sand mill, and grinding and stirring until the fineness of solid particles in the prefabricated mixed slurry meets the product requirement for later use;
and 5: filtering the prefabricated mixed slurry in the sand mill by a screen, adding the filtered prefabricated mixed slurry into the remaining 50-90% of modified fluorocarbon resin solution under the stirring action, and discharging the mixture after fully stirring and uniformly mixing to obtain a resin component of the anticorrosive paint;
step 6: and (3) uniformly mixing the resin component of the anticorrosive coating with the curing agent to obtain the modified fluorocarbon anticorrosive coating.
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