CN110982322A - Seawater-resistant antifouling liquid coating and preparation method and application thereof - Google Patents
Seawater-resistant antifouling liquid coating and preparation method and application thereof Download PDFInfo
- Publication number
- CN110982322A CN110982322A CN201911278383.8A CN201911278383A CN110982322A CN 110982322 A CN110982322 A CN 110982322A CN 201911278383 A CN201911278383 A CN 201911278383A CN 110982322 A CN110982322 A CN 110982322A
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- coating
- component
- seawater
- antifouling liquid
- resistant antifouling
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
-
- 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
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The coating has a functional gradient structure, a through channel does not exist in the structure, the resistance to cathodic disbonding and the anti-permeability are strong, external corrosive media such as chloride ions and the like are not easy to permeate the coating to enter the surface of a workpiece, and the good anti-corrosion and anti-fouling effects are achieved. The coating is formed by heat curing, the mechanical strength of the coating is high, the bonding strength between the coating and the metal matrix is more than or equal to 35MPa, and the coating can be machined. The coating is harmless to marine organisms, replaces the commonly adopted heavy pollution protection methods such as solvent paint coating, hot dip galvanizing and the like, and reduces the environmental pollution.
Description
Technical Field
The invention relates to the technical field of marine antifouling and anticorrosive coatings, in particular to a seawater-resistant antifouling liquid coating and a preparation method and application thereof.
Background
The ocean accounts for about 70% of the surface area of the earth, and the development and utilization of seawater have attracted extensive attention to the search for the most suitable ocean anticorrosive material.
The seawater corrosion mainly comprises electrochemical corrosion and marine organism and microorganism corrosion. The electrochemical corrosion has different corrosion speeds with different salt content, temperature, dissolved oxygen, PH value and flow velocity of the seawater and different waves. The influence of marine organisms and microorganisms on corrosion is complex, and the types and degrees of their attachment vary, as well as the degree of corrosion on materials.
At present, most of protective coatings at home and abroad only singly solve electrochemical corrosion or marine organism and microorganism corrosion, but cannot simultaneously solve two corrosion conditions in seawater corrosion. The problem that chemical corrosion and marine organism corrosion can only be solved by overlapping two coatings is solved, so that the protection cost and the construction difficulty are greatly increased.
Disclosure of Invention
The invention aims to provide a seawater-resistant antifouling liquid coating and a preparation method and application thereof, aiming at solving the problem that most of the existing protective coatings at home and abroad only singly solve electrochemical corrosion or marine organism and microorganism corrosion but cannot simultaneously solve two corrosion conditions in seawater corrosion. The technical problems that the protection cost and the construction difficulty are greatly increased due to the fact that chemical corrosion and marine organism corrosion can only be used by means of superposition of two coatings are solved thoroughly.
In order to solve the above technical problems, the present invention provides a seawater-resistant antifouling liquid coating comprising a blend of two components:
the component A comprises 55 to 75 percent of E51 epoxy resin and ultrafine TiO23% -5% and the balance of filler;
the component B comprises 5 to 25 percent of curing agent, 0.8 to 1 percent of auxiliary agent and 1 to 3 percent of liquid wax.
Preferably, the ultrafine TiO2The grain diameter of the particles is less than or equal to 45 mu m.
Preferably, the filler in the A component is CaCO3And BaSO4Mixture of (1), said CaCO3With BaSO4The mixing ratio of (A) to (B) is 2: (1-5).
Preferably, the particle size of the filler is 0.6-0.8 μm.
Preferably, the curing agent is a T31 curing agent.
Preferably, the auxiliary agent is a coupling agent KH560 or an antifoaming agent 550.
In addition, the invention also provides a method for preparing the seawater-resistant antifouling liquid coating, which comprises the following steps:
step one, respectively putting all the raw materials in the component A and the component B into two mixers to mix;
step two, respectively carrying out coarse grinding on the mixed component A and the component B;
step three, respectively carrying out fine grinding on the roughly ground component A and the component B;
and step four, weighing the component A and the component B respectively according to the weight ratio of 4:1, and fully stirring and fusing to obtain the finished product liquid coating.
Preferably, the fineness of the component A after fine grinding in the step three is not more than 100 μm.
In addition, the invention also provides application of the seawater-resistant antifouling liquid coating.
Compared with the prior art, the invention has the characteristics and beneficial effects that:
(1) the seawater-resistant antifouling liquid coating provided by the invention is obtained by mixing a component A and a component B (curing agent), the film forming mechanism of the coating is that an organic polymer material obtained by mixing the component A and the component B according to a certain proportion generates a thermal curing reaction, and various components in the coating generate physical property changes due to different densities in the curing reaction process of the coating, so that the coating has a functional gradient structure. The bottom layer reacts by epoxy rings in the epoxy resin and amines in the curing agent and forms mechanical anchoring combination with the anchor lines of the workpiece substrate. The middle layer is prepared from epoxy ring in epoxy resin, amine in curing agent and superfine TiO2The curing reaction is carried out, the metal oxide, the 0.6-0.8 mu m ultrafine powder and the like added in the coating composition help the coating to form a compact space network structure in the curing process, and the penetration of water, oxygen molecules and the like can be shielded. The surface layer forms a compact and smooth network by the solidification reaction of the epoxy ring and the amines and the liquid wax in the curing agentAnd (5) structure. There is not the through passage in the whole structure, external corrosive medium such as chloride ion, and the secretion of marine organism, microorganism etc. is difficult to see through the coating and gets into the workpiece surface, and then reaches fine anticorrosive, antifouling effect.
(2) The seawater-resistant antifouling liquid coating disclosed by the invention has the advantages that the surface of the coating is smooth due to the addition of the liquid wax, the surface energy of the coating is reduced, marine organisms are not easy to attach due to the low surface energy, and the antifouling performance is further achieved.
(3) The seawater-resistant antifouling liquid coating is prepared by mixing the component A and the component B, a compact reticular structure coating is formed by linkage recombination of each bond of a macromolecule, the coating does not contain a solvent and has no organic solvent volatilization defect, a through channel does not exist in the coating structure, and the coating has strong cathodic disbonding resistance and permeation resistance. The coating is formed by heat curing, the mechanical strength of the coating is high, the bonding strength between the coating and the metal matrix is more than or equal to 35MPa, and the coating can be machined.
(4) The seawater-resistant antifouling liquid coating disclosed by the invention has the advantages that by adding materials such as metal oxide and 0.6-0.8 mu m ultrafine powder, the coating formed at one time has a functional gradient structure, the bottom layer has high bonding strength with a substrate, the middle layer has permeation resistance, and the surface layer has the characteristics of wear resistance and marine organism pollution resistance, so that the complex process of multiple forming of traditional coatings such as primer, intermediate paint, finish paint and multiple coatings in a superposed manner is abandoned, and the problem of interlayer defects of a multilayer structure is avoided.
(5) The seawater-resistant antifouling liquid coating can simultaneously meet the seawater antifouling performance of preventing seawater corrosion and marine organism and microorganism corrosion. And the mechanical strength of the coating is high, the bonding strength of the coating and a metal matrix is more than or equal to 35MPa, and the coating can be machined. The coating has strong cathodic disbonding resistance and permeation resistance, resists chemical medium corrosion and has good corrosion resistance to chloride.
(6) The seawater-resistant antifouling liquid coating disclosed by the invention is non-toxic to marine organisms, replaces commonly adopted heavy pollution protection methods such as solvent paint coating and hot dip galvanizing, and reduces the environmental pollution.
(7) The seawater-resistant antifouling liquid coating is an environment-friendly coating, wherein a coating is formed by mixing a component A and a component B and then carrying out a thermosetting chemical reaction, and no organic solvent is volatilized during the coating preparation.
Detailed Description
In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention is further described below.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The preparation method of the seawater-resistant antifouling liquid coating comprises the following steps: according to the dosage of each component in the table 1, all the raw materials in the component A and the component B are respectively put into two ball mills to be mixed, ground and stirred. And then mixing and stirring the ground component A and the ground component B according to the weight ratio of 4:1 to obtain the liquid coating.
TABLE 1 Components and amounts of raw materials in the examples
The above ultrafine TiO2The grain diameter of the particles is less than or equal to 45 mu m. The filler in the component A is CaCO3And BaSO4The mixture of (A) is pulverized and then repeatedly ground to form ultrafine powder. The particle size of the filler is 0.6-0.8 mu m. The CaCO3With BaSO4The mixing ratio of (1) - (5) is 2. The curing agent is T31 curing agent. The auxiliary agent is coupling agent KH560 and defoaming agent 550.
The component A and the component B are mixed and stirred according to the weight ratio of 4:1 to obtain the liquid coating, and the mixed liquid coating is coated on the surface of a product. And carrying out relevant performance tests, wherein the test results are shown in table 2.
TABLE 2 test results of the coating properties prepared according to the examples
The seawater-resistant antifouling liquid coating can be soaked in water at 95 ℃ for 30 days without damaging the coating, the impact resistance of the coating can reach 15J to the maximum, and a dynamic simulation experiment of 12-month antifouling performance can meet the requirement that the coverage area of hard shell fouling organisms of a test sample is less than 25%. The performances show that the coating can simultaneously meet the seawater antifouling performance for preventing seawater corrosion and marine organism and microorganism corrosion, and can be widely applied to harsh seawater corrosion environments.
The coating with high-performance seawater corrosion resistance and antifouling performance is not reported at home and abroad.
The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (9)
1. A seawater resistant antifouling liquid coating, characterized in that the liquid coating comprises a blend of two components:
the component A comprises 55 to 75 percent of E51 epoxy resin and ultrafine TiO23% -5% and the balance of filler;
the component B comprises 5 to 25 percent of curing agent, 0.8 to 1 percent of auxiliary agent and 1 to 3 percent of liquid wax.
2. The seawater-resistant antifouling liquid paint according to claim 1, wherein: the ultrafine TiO being2The grain diameter of the particles is less than or equal to 45 mu m.
3. The seawater-resistant antifouling liquid paint according to claim 1, wherein: the filler in the component A is CaCO3And BaSO4Mixture of (1), said CaCO3With BaSO4The mixing ratio of (A) to (B) is 2: (1-5).
4. The seawater-resistant antifouling liquid paint according to claim 3, wherein: the particle size of the filler is 0.6-0.8 mu m.
5. The seawater-resistant antifouling liquid paint according to claim 1, wherein: the curing agent is T31 curing agent.
6. The seawater-resistant antifouling liquid paint according to claim 1, wherein: the auxiliary agent is a coupling agent KH560 or an antifoaming agent 550.
7. A method for preparing the seawater-resistant antifouling liquid paint as claimed in claim 1 to 6, which is characterized by comprising the following steps:
step one, respectively putting all the raw materials in the component A and the component B into two mixers to mix;
step two, respectively carrying out coarse grinding on the mixed component A and the component B;
step three, respectively carrying out fine grinding on the roughly ground component A and the component B;
and step four, weighing the component A and the component B respectively according to the weight ratio of 4:1, and fully stirring and fusing to obtain the finished product liquid coating.
8. The method of claim 7, wherein the coating is a seawater-resistant antifouling liquid coating, comprising: the fineness of the component A after fine grinding in the step three is not more than 100 mu m.
9. Use of the seawater-resistant and antifouling liquid coating according to claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278383.8A CN110982322A (en) | 2019-12-12 | 2019-12-12 | Seawater-resistant antifouling liquid coating and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278383.8A CN110982322A (en) | 2019-12-12 | 2019-12-12 | Seawater-resistant antifouling liquid coating and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN110982322A true CN110982322A (en) | 2020-04-10 |
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| CN201911278383.8A Pending CN110982322A (en) | 2019-12-12 | 2019-12-12 | Seawater-resistant antifouling liquid coating and preparation method and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113150655A (en) * | 2021-05-26 | 2021-07-23 | 河北道融管道设备制造有限公司 | High-performance seawater-resistant antifouling corrosion-resistant liquid coating for marine equipment engineering |
| CN114836106A (en) * | 2022-06-06 | 2022-08-02 | 季华实验室 | Antifouling paint and preparation method thereof |
| CN115261069A (en) * | 2022-06-29 | 2022-11-01 | 海南汉地阳光石油化工有限公司 | Preparation method of novel coastal anticorrosive paint blender |
| CN116656213A (en) * | 2023-06-27 | 2023-08-29 | 厦门双瑞船舶涂料有限公司 | Self-lubricating fouling self-stripping type anti-fouling paint and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113150655A (en) * | 2021-05-26 | 2021-07-23 | 河北道融管道设备制造有限公司 | High-performance seawater-resistant antifouling corrosion-resistant liquid coating for marine equipment engineering |
| CN114836106A (en) * | 2022-06-06 | 2022-08-02 | 季华实验室 | Antifouling paint and preparation method thereof |
| CN115261069A (en) * | 2022-06-29 | 2022-11-01 | 海南汉地阳光石油化工有限公司 | Preparation method of novel coastal anticorrosive paint blender |
| CN115261069B (en) * | 2022-06-29 | 2024-02-20 | 海南汉地阳光石油化工有限公司 | Preparation method of novel coastal anti-corrosion coating blending agent |
| CN116656213A (en) * | 2023-06-27 | 2023-08-29 | 厦门双瑞船舶涂料有限公司 | Self-lubricating fouling self-stripping type anti-fouling paint and preparation method thereof |
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Application publication date: 20200410 |