CN109486347B - Anticorrosive coating material applied to anti-seismic support and preparation method thereof - Google Patents
Anticorrosive coating material applied to anti-seismic support and preparation method thereof Download PDFInfo
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- CN109486347B CN109486347B CN201811308121.7A CN201811308121A CN109486347B CN 109486347 B CN109486347 B CN 109486347B CN 201811308121 A CN201811308121 A CN 201811308121A CN 109486347 B CN109486347 B CN 109486347B
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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
- 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
- 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
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C08K2003/0893—Zinc
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Abstract
The invention discloses an anticorrosive coating material applied to an anti-seismic support, which is characterized by comprising the following components in parts by weight: 10-20 parts of modified epoxy resin; 10-30 parts of zinc powder; 2.5-10 parts of an organic complexing agent; 5-10 parts of an inorganic complexing agent; 5-8 parts of a binder; 1-2 parts of an auxiliary agent; 5-12 parts of polyamide; 5-10 parts of an organic solvent; the modified epoxy resin is phthalic acid modified epoxy resin. The invention also provides a preparation method of the material, the material can greatly reduce the usage amount of zinc powder in the coating, and remarkably improve the mechanical strength, adhesive force, corrosion resistance and weather resistance of the coating, and the method has the advantages of simple preparation, low cost and easy industrialized batch production.
Description
Technical Field
The invention relates to the field of anticorrosive coating materials, in particular to an anticorrosive coating material applied to an anti-seismic support and a preparation method thereof.
Background
Metal corrosion is a spontaneous process, and has always caused serious loss and even disastrous accidents to human production and life. Corrosion is actually a great damage and waste of natural resources, and breakage or fracture of metal may not only cause leakage of harmful substances but also cause environmental pollution. In addition, if a corrosion failure condition occurs in a certain key part and is not paid attention to in time, sudden catastrophic accidents can be caused, the safety of daily life is endangered, and great loss and harm are brought to national economy, which is particularly true in metal anti-seismic materials.
One critical factor for failure of metal anti-seismic materials in the world, such as anti-seismic supports, anti-seismic hangers and the like, in anti-seismic is corrosion, and according to incomplete statistics, the metal anti-seismic supports in the world cause 20 billion losses due to corrosion every year. With the development of the metal corrosion protection subject, the research on the anticorrosive materials applied to the anti-seismic support is also concerned, and at present, the organic coating is generally considered to be the most effective, most economic and most commonly applied anticorrosive measure.
However, the coating is not a perfect physical barrier, since the application of an organic coating on the metal surface, although able to retard the diffusion of corrosive media to the metal substrate, is not completely inhibited. Once the corrosive medium penetrates the coating to reach the metal surface, corrosion of the metal substrate remains unavoidable. Therefore, it is desirable to modify the coated substrate to ensure that the corrosion protective coating effectively isolates the corrosive media from the metal substrate during use. However, a coating prepared from a common material and a metal substrate often have larger gaps, do not have good physical shielding effect, and easily cause corrosive media to enter the metal substrate, so that corrosion damage is caused.
The epoxy zinc-rich coating material is a heavy-duty coating material with excellent corrosion resistance, and is widely applied to the field of heavy metal corrosion resistance. The zinc in the epoxy zinc-rich coating is a sacrificial anode, and the content of the zinc in the coating is usually more than 70%, however, the zinc powder content in the coating is too high, the coating is easy to be porous, the adhesion is reduced, and the zinc-rich coating generates more zinc salts when playing a role of cathode protection, so that the binding force between the upper coating and the zinc-rich coating is influenced, and the corrosion resistance of the coating is reduced.
Disclosure of Invention
The first purpose of the invention is to provide a modified epoxy zinc-rich anticorrosive coating material which is applied to an anti-seismic support and has good coating adhesion and excellent anticorrosive performance.
In order to achieve the purpose, the method is realized by the following technical means: an anticorrosive coating material applied to an anti-seismic support comprises the following components in parts by weight:
the modified epoxy resin is phthalic acid modified epoxy resin.
The method is further optimized as follows: the epoxy resin of the phthalic acid modified epoxy resin is epoxy resin SM 6101.
The method is further optimized as follows: the organic complexing agent is one or more of EDTA, CDTA, NTA and EGTA.
The method is further optimized as follows: the inorganic complexing agent is one or more of zinc citrate, zinc pyrophosphate, zinc thiosulfate and zinc sulfite.
The method is further optimized as follows: the binder is polyvinyl acetal or polycarbonate.
The method is further optimized as follows: the auxiliary agent comprises 0.5-1 part of dispersing agent, 0.2-0.5 part of defoaming agent and 0.3-0.5 part of flatting agent, wherein the dispersing agent is one or more of BYK191, BYK190, BYK180 or BYK110, the defoaming agent is one or more of polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane, and the flatting agent is one or more of polyacrylic acid, carboxymethyl cellulose and butyl cellulose.
The method is further optimized as follows: the organic solvent is one or more of ethylene glycol ethyl ether, ethylene glycol butyl ether or dipropylene glycol butyl ether.
The second purpose of the invention is to provide a preparation method of the modified epoxy zinc-rich anticorrosive coating material which is applied to an anti-seismic support and has good coating adhesion and excellent anticorrosive performance.
The method comprises the following steps:
(1) weighing the raw materials according to the proportion of each component;
(2) adding the weighed zinc powder, organic complexing agent, inorganic complexing agent and part of organic solvent into a reaction kettle, heating to 70-90 ℃, continuously stirring, keeping the temperature, reacting for 5-8 hours, and cooling;
(3) adding the modified epoxy resin, the binder, the auxiliary agent, the polyamide and the other part of organic solvent into the slurry prepared in the step (2) while slowly stirring, dispersing at a high speed for more than half an hour, and adjusting the viscosity to prepare the modified epoxy zinc-rich anticorrosive coating material.
Compared with the prior art, the invention has the beneficial effects that:
(1) the use amount of zinc powder in the coating can be greatly reduced by adding the zinc-containing inorganic complexing agent, for example, the content of the zinc powder can be reduced to below 50 percent and is far lower than 70 percent of the common content;
(2) the zinc-containing inorganic complex and the zinc powder have synergistic effect, so that the obtained coating is thinner, the corrosion prevention mode that the common zinc-rich coating takes zinc powder as a cost is overcome, zinc salt generated by the zinc-rich coating during the cathode protection can be absorbed by the complexing of the inorganic complexing agent and the organic complexing agent, and cannot be deposited between the upper coating and the zinc-rich coating to influence the binding force between the upper coating and the zinc-rich coating, so that the binding force and compatibility between the coatings are enhanced, zinc oxide smoke generated during welding is greatly reduced, the coating is environment-friendly, has good water resistance, acid resistance and salt mist resistance, the mechanical strength, the adhesive force, the corrosion resistance and the weather resistance of the coating are obviously improved, and the service life of the coating is longer;
(3) generally, the anti-seismic support is galvanized before being used, and then the anti-corrosion coating is coated, on one hand, the galvanizing is also used for corrosion prevention, and the adhesive in the anti-corrosion coating can play a role of bonding a galvanized layer after being coated on the galvanized layer, so that the binding force between the galvanized layer and the anti-corrosion coating is increased, and the anti-corrosion coating is prevented from falling off from the galvanized layer.
(4) The hydroxyl of the epoxy resin reacts with phthalic anhydride through the modified epoxy resin, and the generated phthalic acid epoxy resin is a dispersing agent with extremely strong dispersing capacity due to the introduction of high-polarity carboxyl, so that the zinc powder and the zinc-containing inorganic complexing agent can be efficiently dispersed and chelated, the zinc powder or a zinc source is uniformly dispersed in the anticorrosive coating, and the optimal anticorrosive effect is achieved.
(5) The invention only needs to mix and react zinc powder with organic complexing agent, inorganic complexing agent and part of organic solvent first to ensure that the zinc powder is firstly 'complexed', and then the modified epoxy resin and the auxiliary agent containing the dispersing agent act in the coating material to be uniformly dispersed to form the anticorrosive coating with good anticorrosive performance.
Detailed Description
The invention will now be further described by way of the following specific examples, which are intended to be illustrative only and not limiting to the scope of the invention.
The anticorrosive coating material applied to the anti-seismic support in the embodiment of the invention comprises the following components in parts by weight:
the modified epoxy resin is phthalic acid modified epoxy resin.
The raw material epoxy resin in the phthalic acid modified epoxy resin is preferably commercially available epoxy resin SM 6101. The modified epoxy resin is prepared by the following method: adding the epoxy resin into a reaction kettle, stirring and heating to 70-90 ℃, preferably 80 ℃, adding phthalic anhydride, continuing stirring, keeping the temperature at 70-90 ℃, preferably 80 ℃, reacting, and cooling to obtain the phthalic acid epoxy resin. The addition amount of the phthalic anhydride is 1 to 15 percent of the mass of the epoxy resin. The epoxy resin is used as a common resin matrix and has the characteristics of excellent adhesive property, mechanical strength, heat resistance, dielectricity and the like, but the epoxy resin contains a large amount of epoxy groups after being cured, the crosslinking density is too high, the obtained product is brittle, the impact resistance, the electrical conductivity, the thermal conductivity and the like are poor, high-polarity carboxyl groups are introduced after the epoxy resin is modified, the dispersing capacity is enhanced, and the inorganic zinc source is chelated, so that a part of the crosslinking density is inhibited, and the electrical conductivity and the thermal conductivity are also improved.
The organic complexing agent is one or more of EDTA, CDTA, NTA and EGTA, and preferably EDTA. The inorganic complexing agent is one or more of zinc citrate, zinc pyrophosphate, zinc thiosulfate and zinc sulfite. The binder is polyvinyl acetal or polycarbonate. The auxiliary agent comprises 0.5-1 part of dispersing agent, 0.2-0.5 part of defoaming agent and 0.3-0.5 part of flatting agent, wherein the dispersing agent is one or more of BYK191, BYK190, BYK180 or BYK110, the defoaming agent is one or more of polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane, and the flatting agent is one or more of polyacrylic acid, carboxymethyl cellulose and butyl cellulose. The organic solvent is one or more of ethylene glycol ethyl ether, ethylene glycol butyl ether or dipropylene glycol butyl ether.
The preparation method of the anticorrosive coating material comprises the following steps:
(1) weighing the raw materials according to the proportion of each component;
(2) adding the weighed zinc powder, organic complexing agent, inorganic complexing agent and part of organic solvent into a reaction kettle, heating to 70-90 ℃, continuously stirring, keeping the temperature, reacting for 5-8 hours, and cooling;
(3) adding the modified epoxy resin, the binder, the auxiliary agent, the polyamide and the other part of organic solvent into the slurry prepared in the step (2) while slowly stirring, dispersing at a high speed for more than half an hour, and adjusting the viscosity to prepare the modified epoxy zinc-rich anticorrosive coating material.
Example 1
(1) Weighing 100kg of epoxy resin (SM6101) and putting into a reaction kettle, stirring and heating to 80 ℃, putting 5kg of phthalic anhydride, continuing stirring, keeping the temperature at 80 ℃ for 15 minutes and cooling to obtain phthalic acid modified epoxy resin;
(2) weighing 85kg of zinc powder, 25kg of EDTA, 50kg of zinc citrate and 25kg of ethylene glycol ethyl ether, adding into a reaction kettle, heating to 70 ℃, continuously stirring, keeping the temperature, reacting for 5 hours, and cooling;
(3) and (3) adding the phthalic acid modified epoxy resin obtained in the step (1), 50kg of polyvinyl acetal, 5kg of BYK191, 2kg of polyoxypropylene glycerol ether, 3kg of polyacrylic acid, 25kg of polyamide and 25kg of ethylene glycol butyl ether into the slurry prepared in the step (2) while slowly stirring, dispersing at a high speed for 40min, and adjusting the viscosity to obtain the modified epoxy zinc-rich anticorrosive coating material.
Example 2
(1) Weighing 100kg of epoxy resin (SM6101) and putting into a reaction kettle, stirring and heating to 80 ℃, putting 8kg of phthalic anhydride, continuing stirring, keeping the temperature at 80 ℃ for 15 minutes and cooling to obtain phthalic acid modified epoxy resin;
(2) weighing 88kg of zinc powder, 25kg of EDTA, 50kg of zinc pyrophosphate and 25kg of ethylene glycol ethyl ether, adding into a reaction kettle, heating to 75 ℃, continuously stirring, keeping the temperature, reacting for 8 hours, and cooling;
(3) and (3) adding the phthalic acid modified epoxy resin obtained in the step (1), 50kg of polycarbonate, 5kg of BYK190, 2kg of polyoxypropylene polyoxyethylene glycerol ether, 3kg of carboxymethyl cellulose, 25kg of polyamide and 25kg of ethylene glycol butyl ether into the slurry prepared in the step (2) while slowly stirring, dispersing for 50min at a high speed, and adjusting the viscosity to obtain the modified epoxy zinc-rich anticorrosive coating material.
Example 3
(1) Weighing 100kg of epoxy resin (SM6101) and putting into a reaction kettle, stirring and heating to 80 ℃, putting 10kg of phthalic anhydride, continuing stirring, keeping the temperature at 85 ℃ for 15 minutes and cooling to obtain phthalic acid modified epoxy resin;
(2) weighing 205kg of zinc powder, 26kg of EDTA, 50kg of zinc thiosulfate and 25kg of dipropylene glycol butyl ether, adding into a reaction kettle, heating to 90 ℃, continuously stirring, keeping the temperature, reacting for 5 hours, and cooling;
(3) and (3) adding the phthalic acid modified epoxy resin obtained in the step (1), 50kg of polyvinyl acetal, 10kg of BYK180, 5kg of polydimethylsiloxane, 5kg of butyl cellulose, 25kg of polyamide and 25kg of ethylene glycol butyl ether into the slurry prepared in the step (2) while slowly stirring, dispersing for 40min at a high speed, and adjusting the viscosity to obtain the modified epoxy zinc-rich anticorrosive coating material.
Example 4
(1) Weighing 100kg of epoxy resin (SM6101), putting into a reaction kettle, stirring and heating to 80 ℃, putting 11kg of phthalic anhydride, continuing stirring, keeping the temperature at 88 ℃ for 15 minutes, and cooling to obtain phthalic acid modified epoxy resin;
(2) weighing 155kg of zinc powder, 25kg of CDTA, 50kg of zinc sulfite and 25kg of ethylene glycol ethyl ether, adding into a reaction kettle, heating to 90 ℃, continuously stirring, keeping the temperature, reacting for 5 hours, and cooling;
(3) and (3) adding the phthalic acid modified epoxy resin obtained in the step (1), 50kg of polyvinyl acetal, 8kg of BYK110, 3kg of polyoxypropylene glycerol ether, 3kg of polyacrylic acid, 2kg of butyl cellulose, 25kg of polyamide and 25kg of ethylene glycol butyl ether into the slurry prepared in the step (2) while slowly stirring, dispersing for 60min at a high speed, and adjusting the viscosity to obtain the modified epoxy zinc-rich anticorrosive coating material.
Example 5
(1) Weighing 100kg of epoxy resin (SM6101), putting into a reaction kettle, stirring and heating to 80 ℃, putting 13kg of phthalic anhydride, continuing stirring, keeping the temperature at 75 ℃ for 30 minutes, and cooling to obtain phthalic acid modified epoxy resin;
(2) weighing 255kg of zinc powder, 20kg of EDTA, 15kg of NTA, 25kg of zinc citrate, 25kg of zinc thiosulfate and 25kg of ethylene glycol ethyl ether, adding into a reaction kettle, heating to 80 ℃, continuously stirring, keeping the temperature, reacting for 8 hours, and cooling;
(3) and (3) adding the phthalic acid modified epoxy resin obtained in the step (1), 50kg of polyvinyl acetal, 5kg of BYK191, 2kg of polyoxypropylene glycerol ether, 2kg of polyoxyethylene glycerol ether, 3kg of polyacrylic acid, 3kg of butyl cellulose, 25kg of polyamide and 25kg of ethylene glycol butyl ether into the slurry prepared in the step (2) while slowly stirring, and then dispersing at a high speed for 40min to adjust the viscosity, so as to prepare the modified epoxy zinc-rich anticorrosive coating material.
Compared with the common epoxy zinc-rich primer coating material, the modified epoxy zinc-rich anticorrosive coating material produced by the preparation process of the invention is subjected to related performance detection, and the detection result is as follows:
as can be seen from the table above, the adhesion and the salt spray resistance of the modified epoxy zinc-rich anticorrosive coating material prepared by the invention are greatly improved, which shows that the modified epoxy zinc-rich anticorrosive coating material has better anticorrosive performance.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. The anticorrosive coating material applied to the anti-seismic support is characterized by comprising the following components in parts by weight:
the modified epoxy resin is phthalic acid modified epoxy resin; the raw material of the epoxy resin for preparing the phthalic acid modified epoxy resin is epoxy resin SM 6101; the phthalic acid modified epoxy resin is prepared by the following method: putting epoxy resin SM6101 into a reaction kettle, stirring and heating to 70-90 ℃, putting phthalic anhydride, continuing stirring, keeping the temperature at 70-90 ℃, cooling to obtain phthalic acid epoxy resin;
the organic complexing agent is one or more of EDTA, CDTA, NTA and EGTA; the inorganic complexing agent is one or more of zinc citrate, zinc pyrophosphate, zinc thiosulfate and zinc sulfite;
the preparation method of the anticorrosive coating material applied to the anti-seismic bracket comprises the following steps:
(1) weighing the raw materials according to the proportion of each component;
(2) adding the weighed zinc powder, organic complexing agent, inorganic complexing agent and part of organic solvent into a reaction kettle, heating to 70-90 ℃, continuously stirring, keeping the temperature, reacting for 5-8 hours, and cooling;
(3) adding the modified epoxy resin, the binder, the dispersant, the defoamer, the flatting agent, the polyamide and the other part of the organic solvent into the slurry prepared in the step (2) while slowly stirring, dispersing at a high speed for more than half an hour, and adjusting the viscosity to prepare the modified epoxy zinc-rich anticorrosive coating material.
2. An anti-corrosion coating material applied to an anti-seismic bracket according to claim 1, wherein the binder is polyvinyl acetal or polycarbonate.
3. The anticorrosive coating material applied to an anti-seismic bracket according to claim 1, wherein the auxiliary agent is 0.5-1 part of dispersing agent, 0.2-0.5 part of defoaming agent and 0.3-0.5 part of leveling agent, the dispersing agent is one or more of BYK191, BYK190, BYK180 or BYK110, the defoaming agent is one or more of polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane, and the leveling agent is one or more of polyacrylic acid, carboxymethyl cellulose and butyl cellulose.
4. The anticorrosive coating material applied to an anti-seismic support according to claim 1, wherein the organic solvent is one or more of ethylene glycol ethyl ether, ethylene glycol butyl ether or dipropylene glycol butyl ether.
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| CN105713481B (en) * | 2014-12-03 | 2018-11-09 | 江苏邦杰防腐保温科技有限公司 | A kind of graphene modified epoxy zinc rich primer and preparation method thereof |
| CN106811040A (en) * | 2015-11-27 | 2017-06-09 | 杨卫兵 | Aqueous heavy antisepsis one-component primers and its preparation method and application |
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