CN110791187B - Water-based organic hybrid anticorrosive coating and preparation method thereof - Google Patents
Water-based organic hybrid anticorrosive 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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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- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
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Abstract
The invention relates to the technical field of corrosion prevention of chemical steel structures, in particular to a water-based organic hybrid anticorrosive coating and a preparation method thereof. The water-based organic hybrid anticorrosive coating is divided into a component A and a component B, wherein the component A is modified polyisocyanate, phosphate ester plasticizer, phosphate ester catalyst, filler, wetting agent, defoaming agent and anti-sagging agent, and the component B is modified water-based emulsion; the mass ratio of the A, B components is 1:1-10: 1. The anticorrosive coating has the anticorrosive performances of high strength, strong acid and alkali resistance, various solvents resistance, freeze thawing resistance, marine climate corrosion resistance and the like, and is suitable for the field of chemical steel structure anticorrosion of steel substrates. The invention has construction diversity and can adopt airless spraying, roller coating and two-component spraying construction modes.
Description
Technical Field
The invention relates to the technical field of corrosion prevention of chemical steel structures, in particular to a water-based organic hybrid anticorrosive coating and a preparation method thereof.
Background
Chemical industry can produce the poisonous and harmful gas that contains strong corrosive medium such as strong acid, alkali, organic solvent in a large number in process of production, and chemical industry equipment such as chemical industry reaction unit, piping lane, storage tank are steel construction material, especially coastal area chemical industry enterprise's production facility not only receives the erosion of the corrosive medium gas that produces in the production, still must stand marine environment's long-time corruption simultaneously, so chemical industry steel construction's anticorrosive treatment is the important problem that chemical industry enterprise faces. In recent years, with the national requirement for VOC emission in the coating industry becoming higher and higher, the technology for vigorously popularizing the water-based coating and the marketization degree of the water-based coating product are increased year by year, and the water-based coating in the chemical steel structure anticorrosive coating field is also one of the important fields of water-based coating application.
At present, the chemical pipe gallery anticorrosive paint is mainly an oil solvent type three-layer system, and comprises a primer, a middle paint and a finish paint, wherein the primer mainly comprises an epoxy zinc-rich primer, epoxy iron oxide red or a universal epoxy primer; the intermediate paint is epoxy micaceous iron; the finish paint is acrylic acid or polyurethane finish paint. The main problems of the solvent-based coating are that the volatile amount of VOC is high, more toxic and harmful VOC components are generated during construction, and great harm is caused to the body and the environment of constructors. The difference between the performance of the corresponding aqueous three-layer system and the performance of the corresponding oil paint is large, and the use requirement of the aqueous three-layer system in a heavy-duty environment above the C3 environment is not met. Meanwhile, the volume shrinkage rate generated after the coating which is crosslinked and solidified into a film in a condensation polymerization mode is high, so that the defects of poor dry and wet adhesion of the coating on a base material are caused, and the coating cannot meet the requirements on salt spray performance and medium resistance. Disclosure of Invention
The invention aims to provide a water-based organic hybrid anticorrosive coating and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a water-based organic hybridization anticorrosion coating comprises a component A and a component B, wherein the component A is modified polyisocyanate, phosphate plasticizer, phosphate catalyst, filler, wetting agent, defoaming agent and anti-sagging agent, and the component B is modified water-based emulsion; the mass ratio of the A, B components is 1:1-10: 1.
The component B is prepared from a water-based substance, a modifier and a foam inhibitor; the component B comprises, by mass, 100 parts of water-based substances 60-95 parts, a modifier 1-5 parts and a foam inhibitor 0.5-2 parts; wherein the water-based substance is water-based resin or emulsion.
The component A comprises, by mass, 10-80 parts of polyisocyanate, 1-30 parts of phosphate ester plasticizer, 1-10 parts of phosphate ester catalyst, 10-50 parts of filler, 0.5-2 parts of wetting agent, 0.3-1 part of defoaming agent and 1-5 parts of anti-sagging agent, based on 100 parts of component A.
The polyisocyanate is 2,4(6) -toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, naphthalene diisocyanate, p-phenylene diisocyanate, 1, 4-cyclohexane diisocyanate, xylylene diisocyanate, cyclohexanedimethylene diisocyanate, trimethyl-1, 6-hexamethylene diisocyanate, tetramethylm-xylylene diisocyanate, norbornane diisocyanate, dimethylbiphenyl diisocyanate, methylcyclohexyl diisocyanate, dimethyldiphenylmethane diisocyanate, lysine diisocyanate, polymethylene polyphenyl polyisocyanate, liquefied MDI, TDI dimer, TDI trimer, TDI-TMP adduct, HDI dimer, HDI trimer, HDI diisocyanate, and the like, One or more of HDI biuret, IPDI trimer, TDI-HDI mixed polymer, HDI-IPDI mixed polymer, triphenylmethane triisocyanate, dimethyl triphenylmethane tetraisocyanate, thiophosphoric acid tri (4-phenyl isocyanate) and heptaisocyanate; among them, liquefied MDI and TDI dimer are preferable.
The phosphate ester is: trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, butyl diethyl phosphate, triphenyl phosphate, tricresyl phosphate, diphenyl phosphate, trichloroethyl phosphate, tris (dichloropropyl) phosphorus, tris (dibromopropyl) phosphate, dichloroethyl phosphate, xylenol dichlorochloroethyl phosphate, diphosphates, polydiphosphoric acid and phosphate containing ether bonds, wherein two or more of diphenyl phosphate, trichloroethyl phosphate, tris (dichloropropyl) phosphorus, tris (dibromopropyl) phosphate, dichloroethyl phosphate or xylenol dichloroethyl phosphate are preferred;
the filler is one or more of zinc phosphate, zinc oxide, iron oxide red, mica iron oxide ash, talcum powder, sericite, composite iron titanium powder, precipitated barium sulfate and lithopone;
the wetting agent is modified benzyl silicone oil;
the defoaming agent is a polysiloxane mixture containing hydrophobic particles;
the anti-sagging agent is two of fumed silica, modified bentonite, hydrogenated castor oil, polyamide wax and polyethylene wax; fumed silica and hydrogenated castor oil are preferred.
The modifier is 5% sodium hydroxide aqueous solution, ammonia water, 40% potassium silicate aqueous solution (modulus 2-6) or 40% sodium silicate aqueous solution (modulus 2-6); preferably a 40% aqueous potassium silicate solution and a 5% aqueous sodium hydroxide solution having a modulus of 3.
The water-based substance is water-based acrylic emulsion, water-based acrylic resin, water-based epoxy emulsion, water-based epoxy ester emulsion or water-based alkyd resin; preferably an aqueous acrylic resin and/or an aqueous acrylic emulsion.
The foam inhibitor is Dow Corning 7610 foam inhibitor.
The water-based acrylic emulsion is a water-based acrylic emulsion with the lowest film-forming temperature (MFT) of 10-110 ℃; aqueous acrylic emulsions having MFT of 64 ℃ and 70 ℃ are preferred.
The water-based acrylic resin is self-emulsifying modified acrylic resin with the glass transition temperature Tg of 30-80 ℃; the self-emulsifying modified acrylic resin having a Tg of 55 ℃ is preferred.
The water-based epoxy emulsion is bisphenol A type epoxy emulsion, bisphenol F type epoxy emulsion or phenolic aldehyde epoxy emulsion; the emulsion has an epoxy equivalent eq of 190 to 800, and is preferably a bisphenol a type self-emulsifying epoxy emulsion (eq 195).
The waterborne epoxy ester emulsion is self-emulsifying acrylic acid modified or self-emulsifying fatty acid modified epoxy ester emulsion; preferably a self-emulsifying acrylic modified epoxy ester emulsion.
The water-based alkyd resin is self-emulsifying short-oil alkyd resin, self-emulsifying medium-oil alkyd resin or self-emulsifying long-oil alkyd resin. Preferably a self-emulsifying short oil alkyd resin.
A preparation method of a water-based organic hybrid anticorrosive coating comprises the following steps:
the preparation process of the component A comprises the following steps: adding the filler, the defoaming agent and the anti-sagging auxiliary agent into the phosphate ester catalyst and the phosphate ester plasticizer, uniformly dispersing, and grinding until the particle size is less than 30 micrometers; adding polyisocyanate and a wetting agent into the grinding fluid under the protection of dry air, uniformly stirring and filtering to obtain a component A;
the preparation process of the component B comprises the following steps: diluting the water-based substance to 40% of solid content, adding a foam inhibitor for uniform dispersion, heating to 40-50 ℃, dropwise adding a modifier until the pH of the system reaches 11-13, keeping the temperature for 1h, cooling to room temperature, and filtering to obtain a component B;
and then mixing the component A and the component B to obtain the aqueous organic hybrid anticorrosive coating.
Compared with the prior art, the invention has the following advantages:
the aqueous organic hybrid anticorrosive coating disclosed by the invention is formed by a cross-linking curing film after components A and B are fully and uniformly mixed under the stirring condition, the cross-linking structure of the coating is mainly a polyurea structure, and an interpenetrating network structure is formed by aqueous macromolecules with the aqueous macromolecules, so that the strength, the water resistance, the salt spray resistance, the acid and alkali resistance and other anticorrosive properties of the coating are improved, and the internal stress of the coating after cross-linking curing is reduced, so that the coating has certain flexibility, and the coating has stronger dry adhesion and wet adhesion on a steel base surface.
The component A is a solvent-free oily component, the component B is a water-based emulsion, and the product belongs to a high-solid solvent-free environment-friendly coating.
According to the invention, the component A and the component B are mixed and then polymerized to generate a cross-linked structure, and simultaneously form an inter-transmission network structure with a high molecular chain in the component B to be uniformly dispersed in the coating, so that the anti-corrosion performance of the coating is greatly improved.
In the process of high-speed dispersion and stirring, the component A is mixed and slowly added with the component B according to the proportion, so that the steel base surface with low surface treatment has stronger adhesive force, and the cost of polishing and sand blasting treatment can be reduced to a certain extent.
The anticorrosive coating has the anticorrosive performances of high strength, strong acid and alkali resistance, various solvents resistance, freeze thawing resistance, marine climate corrosion resistance and the like, and is suitable for the field of chemical steel structure anticorrosion of steel substrates.
The invention has construction diversity and can adopt airless spraying, roller coating and two-component spraying construction modes.
Detailed Description
The technical solutions, the technical problems to be solved, the technical solutions and the advantages of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The water-based organic hybrid anticorrosive coating has the characteristics of low VOC, environmental protection, flame retardance, high mechanical strength, wear resistance and the like, and simultaneously has the anticorrosive properties of salt spray resistance, acid and alkali resistance, organic solvent medium resistance and the like as the water-based anticorrosive coating. The water-based organic hybrid anticorrosive coating takes solvent-free oily active resin and anticorrosive filler as a component A, takes modified water-based emulsion or resin as a component B, and is dispersed into the active oily resin at high speed to be crosslinked, cured and formed into a film. The curing agent forms a compact coating with an interpenetrating network structure of active resin crosslinking and water-based resin, wherein the component B not only provides a high molecule capable of forming an interpenetrating network, but also is a curing agent for curing the oily active resin.
The modified water-based resin or emulsion is used as a component B to prepare the water-based organic hybrid anticorrosive coating, so that the cohesion of the coating after curing is reduced to improve the dry film adhesive force and wet adhesive force of the coating, and the physical and mechanical strength is improved by the crosslinking of a catalytic system, and the compactness of the coating, the salt spray resistance, the acid and alkali resistance, the solvent resistance and other medium resistance properties are improved.
Example 1
The preparation process of the component A comprises the following steps: sequentially adding a defoaming agent 6800, BEZ75, iron oxide red RS11, zinc phosphate, zinc oxide and precipitated barium sulfate into a mixed solution of triethyl phosphate and triphenyl phosphate according to the mass fraction shown in Table 1, dispersing at a stirring speed of 400r/min for 15min, and grinding until the particle size is less than 30 μm; and adding the polyisocyanate and the wetting agent into the grinding fluid under the protection of dry air, dispersing for 15min at a speed of 400r/min, and filtering to obtain a component A.
The preparation process of the component B comprises the following steps: adding 40% of solid aqueous acrylic emulsion according to the mass fraction in the table 2, mixing with a foam inhibitor 7610, heating to 40 ℃, dropwise adding ammonia water at 400r/min to adjust the pH value to 11, stirring for 15min, keeping the temperature for 1h, cooling to room temperature, and filtering to obtain a component B.
TABLE 1A composition ratio
TABLE 2 component ratios of B
The component A, B of the water-based nano paint is a mixed anticorrosive paint, wherein the component A is a resin main body, and the component B is a curing agent. In the process of high-speed dispersion and stirring of the component A, the component B is slowly added according to the proportion (the component A: the component B is 8:1) and uniformly mixed, and then airless spraying, roller coating and two-component spraying are carried out.
While A, B components are mixed in the ratio ranges given above to achieve the corresponding performance characteristics.
Examples 2 to 22
According to the step of synthesizing the component B in the example 1, the PH of the aqueous emulsion or the resin, the modifier and the modification system is replaced according to the description in the table 3, the synthesis method of other components in the modification process is not changed, and the proportion of the A, B component of the coating is compounded according to the table 3, so that the aqueous organic hybrid anticorrosive coating material is obtained.
Meanwhile, the comparative examples 1 and 2 are the proportions of different components B, and the formula composition and proportion of the component A are consistent with those of the example 1;
TABLE 3B composition ratio and characteristic parameters
| Name (R) | Aqueous emulsion and/or resin | Specification of | Modifying agent | PH | Ratio of A to B |
| Example 2 | Aqueous acrylic emulsion | MFT＝64℃ | 5％NaOH | 12 | 8:1 |
| Example 3 | Aqueous acrylic emulsion | MFT＝64℃ | 40％K2SiO3(n＝2) | 12 | 6:1 |
| Example 4 | Aqueous acrylic emulsion | MFT＝64℃ | 40％Na2SiO3(n＝2) | 12 | 6:1 |
| Example 5 | Aqueous acrylic emulsion | MFT＝64℃ | 40％K2SiO3(n＝3) | 12 | 5:1 |
| Example 6 | Aqueous acrylic emulsion | MFT＝64℃ | 40％Na2SiO3(n＝3) | 12 | 5:1 |
| Example 7 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | Aqueous ammonia | 11 | 4:1 |
| Example 8 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 5％NaOH | 13 | 8:1 |
| Example 9 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 40％K2SiO3(n＝2) | 13 | 6:1 |
| Example 10 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 40％Na2SiO3(n＝2) | 13 | 6:1 |
| Example 11 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 40％K2SiO3(n＝3) | 13 | 5:1 |
| Example 12 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 40％Na2SiO3(n＝3) | 13 | 5:1 |
| Example 13 | Self-emulsifying aqueous epoxy emulsion | eq＝195 | 40％K2SiO3(n＝2) | 10 | 6:1 |
| Example 14 | Self-emulsifying aqueous epoxy emulsion | eq＝195 | 40％Na2SiO3(n＝2) | 10 | 6:1 |
| Example 15 | Self-emulsifying aqueous epoxy emulsion | eq＝195 | 40％K2SiO3(n＝3) | 10 | 5:1 |
| Example 16 | Self-emulsifying aqueous epoxy emulsion | eq＝195 | 40％Na2SiO3(n＝3) | 10 | 5:1 |
| Example 17 | Self-emulsifying aqueous epoxy ester emulsion | Modification of acrylic acid | 40％K2SiO3(n＝2) | 11 | 6:1 |
| Example 18 | Self-emulsifying aqueous epoxy ester emulsion | Modification of acrylic acid | 40％Na2SiO3(n＝2) | 11 | 6:1 |
| Example 19 | Self-emulsifying aqueous epoxy ester emulsion | Fatty acid modification | 40％K2SiO3(n＝3) | 11 | 5:1 |
| Example 20 | Self-emulsifying aqueous epoxy ester emulsion | Fatty acid modification | 40％Na2SiO3(n＝3) | 11 | 5:1 |
| Example 21 | Self-emulsifying aqueous alkyd emulsion | Short oil | 40％K2SiO3(n＝2) | 10 | 6:1 |
| Example 22 | Self-emulsifying aqueous alkyd emulsion | Short oil | 40％Na2SiO3(n＝2) | 10 | 6:1 |
| Comparative example 1 | Self-emulsifying aqueous alkyd emulsion | Short oil | - | 8 | 6:1 |
| Comparative example 2 | Self-emulsifying aqueous acrylic resin | Tg＝55℃ | 8 | 6:1 |
The coatings obtained in the examples described above were tested, as well as comparative coatings, (see table 4), in which the adhesion of the materials was tested according to standard GB/T5210-; testing the solvent resistance and acid and alkali resistance of the material by using a standard GB/T9274-1988; the salt spray resistance of the material is tested by the standard GB/T1771-2007 and the flexibility of the material is tested by the standard GB/T1731-1993.
Table 4 physical mechanical property test data of each example
Note: the mixed acid solution was 5% hydrochloric acid: 10% sulfuric acid 1:1 (mass ratio)
The mixed alkali solution is 10% sodium hydroxide: 10% Potassium hydroxide 1:1 (mass ratio)
The mixed solvent is kerosene: xylene: ethanol 1:1:1 (mass ratio)
As can be seen from Table 4, the adhesion of the steel substrate of the example is 9-15 MPa, which is greater than 5MPa and 6MPa of the steel substrate of the comparison 1 and the steel substrate of the comparison 2; the adhesive force of the steel base material after the salt spray failure is 7-13 MPa, which is greater than 0MPa and 2MPa of comparison 1 and comparison 2; the salt spray resistance of the examples is greater than 1000h, while the salt spray resistance of comparative 1 and comparative 2 is less than 1000 h; the flexibility of the examples is less than or equal to 2mm and is better than that of 4mm and 3mm of comparison 1 and comparison 2.
As can be seen from table 4, the mixed acid, mixed base and mixed solvent resistance of the examples are superior to those of comparative examples 1 and 2. The micro bubbles are formed after the mixed acid resistant medium is used for 60 days in the embodiments 1-5, 13-16 and 21-22, the paint film is intact after the mixed alkali resistant medium is used for 120 days in the embodiments 1-22, and the micro bubbles are formed after the organic solvent resistant medium is used for 30 days in the embodiments 1-5, 13-16 and 21-22; while the mixed acid medium resistant of comparison 1 and comparison 2 can be expanded and expanded after 60 days, the mixed alkali medium resistant of comparison 120 days can be expanded and expanded, and the organic solvent resistant of comparison 30 days can be expanded and expanded.
As can be seen from tables 4 and 5, the physical and mechanical properties and the medium resistance of examples 7 to 12 and 17 to 20 are excellent, particularly the performances of examples 9 and 17 are optimal, so that the organic hybrid structure formed by the self-emulsifying water-based acrylic resin and the self-emulsifying water-based epoxy ester resin and existing in the form of a cross-linked interpenetrating network is more compact, and particularly 40% K of a modifier is adopted2SiO3The (n-2) modified component B and the component A have obviously improved physical mechanical strength and medium resistance after being cured. As can be seen from comparative examples 9 and 17, the addition of the modifier enables the organic hybrid interpenetrating network structure formed by the system to be more compact and stable; and the compactness of the organic hybrid interpenetrating network structure formed by the aqueous resin or emulsion which is not modified by the modifier in the comparison samples 1 and 2 is insufficient, so that the physical and mechanical properties and the medium resistance of the organic hybrid interpenetrating network structure are lower.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An aqueous organic hybrid anticorrosive coating, which is characterized in that: the water-based organic hybrid anticorrosive coating is divided into a component A and a component B, wherein the component A is polyisocyanate, a phosphate plasticizer, a phosphate catalyst, a filler, a wetting agent, a defoaming agent and an anti-sagging agent, and the component B is a modified water-based emulsion; the A, B component has a mass ratio of 1:1-10: 1;
the component B is prepared from a water-based substance, a modifier and a foam inhibitor; the component B comprises, by mass, 100 parts of water-based substances 60-95 parts, a modifier 1-5 parts and a foam inhibitor 0.5-2 parts; wherein the water-based substance is water-based resin or emulsion;
the component A comprises, by mass, 10-80 parts of polyisocyanate, 1-30 parts of phosphate ester plasticizer, 1-10 parts of phosphate ester catalyst, 10-50 parts of filler, 0.5-2 parts of wetting agent, 0.3-1 part of defoaming agent and 1-5 parts of anti-sagging agent, based on 100 parts of component A;
the modifier is 5% sodium hydroxide aqueous solution, ammonia water, 40% modulus 2-6 potassium silicate aqueous solution or 40% modulus 2-6 sodium silicate aqueous solution.
2. The aqueous organic hybrid anticorrosive coating according to claim 1, characterized in that: the polyisocyanate is 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, naphthalene diisocyanate, p-phenylene diisocyanate, 1, 4-cyclohexane diisocyanate, xylylene diisocyanate, cyclohexanedimethylene diisocyanate, trimethyl-1, 6-hexamethylene diisocyanate, tetramethyl m-xylylene diisocyanate, norbornane diisocyanate, dimethylbiphenyl diisocyanate, methylcyclohexyl diisocyanate, dimethyldiphenylmethane diisocyanate, lysine diisocyanate, polymethylene polyphenyl polyisocyanate, liquefied MDI, TDI dimer, TDI trimer, TDI-TMP adduct, toluene diisocyanate, toluene, One or more of HDI dimer, HDI trimer, HDI biuret, IPDI trimer, TDI-HDI mixed polymer, HDI-IPDI mixed polymer, triphenylmethane triisocyanate, dimethyltriphenylmethane tetraisocyanate, thiophosphoric acid tri (4-phenyl isocyanate) and heptaisocyanate;
the phosphate ester is: one or more of trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, butyl diethyl phosphate, triphenyl phosphate, tricresyl phosphate, diphenyl phosphate, trichloroethyl phosphate, tris (dichloropropyl) phosphate, tris (dibromopropyl) phosphate and phosphate containing ether bonds;
the filler is one or more of zinc phosphate, zinc oxide, iron oxide red, mica iron oxide ash, talcum powder, sericite, composite iron titanium powder, precipitated barium sulfate and lithopone;
the wetting agent is modified benzyl silicone oil;
the defoaming agent is a polysiloxane mixture containing hydrophobic particles;
the anti-sagging agent is two of fumed silica, modified bentonite, hydrogenated castor oil, polyamide wax and polyethylene wax;
the water-based substance is water-based acrylic emulsion, water-based acrylic resin, water-based epoxy emulsion, water-based epoxy ester emulsion or water-based alkyd resin.
3. The aqueous organic hybrid anticorrosive coating according to claim 2, characterized in that:
the phosphate is two or more of diphenyl phosphate, trichloroethyl phosphate, tris (dichloropropyl) phosphate or tris (dibromopropyl) phosphate.
4. The aqueous organic hybrid anticorrosive coating according to claim 2, characterized in that:
the water-based acrylic emulsion is a water-based acrylic emulsion with the lowest film-forming temperature (MFT) of 10-110 ℃;
the water-based acrylic resin is self-emulsifying modified acrylic resin with the glass transition temperature of Tg = 30-80 ℃;
the water-based epoxy emulsion is bisphenol A type epoxy emulsion, bisphenol F type epoxy emulsion or phenolic aldehyde epoxy emulsion;
the waterborne epoxy ester emulsion is self-emulsifying acrylic acid modified or self-emulsifying fatty acid modified epoxy ester emulsion;
the water-based alkyd resin is self-emulsifying short-oil alkyd resin, self-emulsifying medium-oil alkyd resin or self-emulsifying long-oil alkyd resin.
5. A method for preparing the aqueous organic hybrid anticorrosive coating according to claim 1, characterized in that:
the preparation process of the component A comprises the following steps: adding the filler, the defoaming agent and the anti-sagging agent into the phosphate ester catalyst and the phosphate ester plasticizer, uniformly dispersing, and grinding until the particle size is less than 30 micrometers; adding polyisocyanate and a wetting agent into the grinding fluid under the protection of dry air, uniformly stirring and filtering to obtain a component A;
the preparation process of the component B comprises the following steps: diluting the water-based substance to 40% of solid content, adding a foam inhibitor for uniform dispersion, heating to 40-50 ℃, dropwise adding a modifier until the pH value of the system reaches 11-13, keeping the temperature for 1h, cooling to room temperature, and filtering to obtain a component B;
and then mixing the component A and the component B to obtain the aqueous organic hybrid anticorrosive coating.
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| JP5587537B2 (en) * | 2007-12-21 | 2014-09-10 | 関西ペイント株式会社 | Two-component water-based anticorrosion paint and anticorrosion coating method |
| CN101985540A (en) * | 2009-07-28 | 2011-03-16 | 海洋化工研究院 | Preservative primer used for ocean steel structure spray polyurea |
| CN103333570A (en) * | 2013-07-26 | 2013-10-02 | 江苏足迹涂料有限公司 | Water-based coating varnish and preparation technology thereof |
| CN107434948A (en) * | 2017-08-31 | 2017-12-05 | 浙江天女集团制漆有限公司 | A kind of double-component aqueous acroleic acid polyurethane coating and preparation method thereof |
| CN109054542A (en) * | 2018-08-07 | 2018-12-21 | 中山市明日涂料材料有限公司 | A kind of environment-friendly water-based anti-corrosion dual-coating and preparation method thereof applied to steel construction |
| CN109554093B (en) * | 2018-11-25 | 2020-12-11 | 中国海洋石油集团有限公司 | Two-component waterborne polyurethane floating coating composition with anti-sagging characteristic and preparation method thereof |
| CN110423531A (en) * | 2019-06-19 | 2019-11-08 | 施雪丽 | Environment-friendly water-based paint of one kind and preparation method thereof |
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2019
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