Normal-temperature curing organic anticorrosive material and application thereof

Abstract

The invention discloses a normal-temperature curing organic anti-corrosion material and application thereof, and belongs to the technical field of organic anti-corrosion materials. The normal-temperature curing organic anticorrosive material comprises the following components in parts by weight: 40-50 parts of film-forming resin, 1-20 parts of anticorrosive filler, 1-10 parts of a mixture containing phosphate ester and 30-60 parts of a solvent, wherein the anticorrosive filler is selected from one or more of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonyl naphthalene sulfonate, calcium dinonyl naphthalene sulfonate and dodecenylsuccinic acid; the mixture containing phosphate ester is selected from phosphate ester and organic amine; and the film-forming resin is selected from alkyd resin and at least one unsaturated ester polymer containing an acrylate monomer. The normal-temperature curing organic anti-corrosion material is excellent in anti-corrosion capacity, the thickness of a coating formed on the metal surface is small, and the anti-corrosion requirements of different structures can be met.

Description

Technical Field

[0001] The invention relates to the technical field of organic anti-corrosion materials, and in particular to a room temperature curing organic anti-corrosion material and application thereof. Background Art

[0002] Organic anti-corrosion materials are mainly used for additional protection of key anti-corrosion parts of the internal structure after aircraft assembly and overhaul. Some products can also be used as temporary field maintenance materials for the internal and external structures of aircraft. Organic anti-corrosion materials are suitable for non-moving structures on aircraft that do not require lubrication, and can be used as one of the repair methods after coating damage, and are used to apply to cracked and damaged parts of the coating. The characteristics of this type of material are extremely strong penetration and water displacement capabilities. Spraying or brushing on the metal structure of the aircraft can automatically remove moisture and salt from the surface and gaps, and quickly form a transparent hard film, which has a good protective effect on various metals on the aircraft, such as steel, copper, aluminum, magnesium, cadmium, zinc, etc.

[0003] Organic anti-corrosion materials have complex compositions, generally including solvents, film-forming agents and a variety of corrosion inhibitors. Due to the presence of certain assembly gaps in key anti-corrosion areas of some internal structures during aircraft assembly and overhaul, it is difficult to apply a thicker protective coating. Therefore, there is an urgent need for an organic anti-corrosion material that can be cured at room temperature and has excellent anti-corrosion properties even with a very thin film thickness to meet the anti-corrosion needs of different structures. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a room temperature curing organic anticorrosive material and its application. The room temperature curing organic anticorrosive material has excellent anticorrosion ability and forms a thin coating on the metal surface.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a room temperature curing organic anticorrosive material, which comprises the following components in parts by weight:

[0007] 40-50 parts of film-forming resin, 1-20 parts of anticorrosive filler, 1-10 parts of a mixture containing phosphate ester, and 30-60 parts of a solvent;

[0008] Wherein, the anticorrosive filler is selected from one or more of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium dinonylnaphthalene sulfonate, and dodecenylsuccinic acid;

[0009] The mixture containing phosphate ester is selected from phosphate ester and organic amine;

[0010] The film-forming resin is selected from alkyd resins and at least one unsaturated aliphatic polymer containing acrylate monomers.

[0011] Preferably, the unsaturated aliphatic polymer containing acrylate monomers is selected from the group consisting of self-polymers or copolymers of acrylate monomers, and polyesters or polyurethanes containing acrylate monomers.

[0012] Preferably, the acrylate monomer in the unsaturated aliphatic polymer is selected from one or more of methyl acrylate monomer, ethyl acrylate monomer, butyl acrylate monomer, methyl methacrylate monomer, isopropyl methyl acrylate monomer and isobornyl acrylate monomer.

[0013] Preferably, the solvent is selected from hydrocarbon solvents having a flash point ≥ 60°C.

[0014] Preferably, in the present invention, the mass ratio of the phosphate ester to the organic amine is 1:(0.5-1.5); more preferably 1:(0.8-1.1); further preferably 1:1.

[0015] More preferably, the room temperature curing organic anticorrosive material of the present invention comprises the following components in parts by weight:

[0016] 40-45 parts of film-forming resin, 8-12 parts of anticorrosive filler, 5-8 parts of a mixture containing phosphate ester, and 40-50 parts of a solvent;

[0017] Wherein, the anticorrosive filler is selected from any two of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium dinonylnaphthalene sulfonate, and dodecenylsuccinic acid;

[0018] The mixture containing phosphate ester is selected from phosphate ester and organic amine;

[0019] The film-forming substance is selected from the group consisting of alkyd resins and self-polymers of acrylate monomers.

[0020] More preferably, the room temperature curing organic anticorrosive material of the present invention comprises the following components in parts by weight:

[0021] 45 parts of film-forming resin, 10 parts of anticorrosive filler, 6 parts of a mixture containing phosphate ester, and 39 parts of a solvent;

[0022] Wherein, the anticorrosive filler is selected from barium petroleum sulfonate and dodecenylsuccinic acid, or the anticorrosive filler is selected from barium dinonylnaphthalene sulfonate and dodecenylsuccinic acid;

[0023] The mixture containing phosphate ester is selected from phosphate ester and organic amine in a mass ratio of 1:1;

[0024] The film-forming substance is selected from alkyd resin and acrylic resin in a mass ratio of 4:5;

[0025] The solvent is selected from D60 solvent oil.

[0026] More preferably, the room temperature curing organic anticorrosive material of the present invention comprises the following components in parts by weight:

[0027] 40 parts of film-forming resin, 10 parts of anticorrosive filler, 6 parts of a mixture containing phosphate ester, and 44 parts of a solvent;

[0028] Wherein, the anticorrosive filler is selected from barium petroleum sulfonate and barium dinonylnaphthalene sulfonate;

[0029] The mixture containing phosphate ester is selected from phosphate ester and organic amine in a mass ratio of 1:1;

[0030] The film-forming substance is selected from an alkyd resin and an acrylic resin in a mass ratio of 3:5;

[0031] The solvent is selected from D60 solvent oil.

[0032] The organic amines described in the present invention include but are not limited to methylamine, ethanolamine, aniline, etc. The present invention also provides the use of the above-mentioned room temperature curing organic anticorrosive material in metal surface anticorrosion.

[0033] The method for using the room temperature curing organic anticorrosion material of the present invention is to coat the room temperature curing organic anticorrosion material on a metal surface, cure and dry it at room temperature, and achieve excellent anticorrosion effect after complete curing.

[0034] The normal temperature is preferably 10°C-30°C.

[0035] The drying time is preferably 30-120 minutes to allow the coating surface to dry; more preferably 45-90 minutes.

[0036] The time required for complete curing is preferably 12-24 hours; more preferably 18-24 hours.

[0037] The present invention does not particularly limit the coating method, and any method well known to those skilled in the art may be used.

[0038] In the present invention, spraying or brushing is preferably used.

[0039] Preferably, the coating thickness of the room temperature curing organic anticorrosive material after curing on the metal surface is 8-25 μm, more preferably 12-25 μm. In some specific embodiments of the present invention, the coating thickness is 12 μm, 22 μm, or 25 μm.

[0040] Preferably, the coating is applied on an aluminum alloy test plate and subjected to a 100-hour neutral salt spray test, and the number of corrosion points (≥1 mm) is ≤3 / 64.5 cm 2 .

[0041] Compared with the prior art, the room temperature curing organic anticorrosive material provided by the present invention comprises the following components by weight: 40-50 parts of film-forming resin, 1-20 parts of anticorrosive filler, 1-10 parts of a mixture containing phosphate ester, and 30-60 parts of a solvent; wherein the anticorrosive filler is selected from one or more of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium dinonylnaphthalene sulfonate, and dodecenylsuccinic acid; the mixture containing phosphate ester is selected from phosphate ester and organic amine; the film-forming resin is selected from alkyd resin and at least one unsaturated aliphatic polymer containing acrylate monomer. The room temperature curing organic anticorrosive material has excellent anticorrosion ability, and the coating formed on the metal surface is thin in thickness, which can meet the anticorrosion requirements of different structures. DETAILED DESCRIPTION

[0042] In order to further illustrate the present invention, the room temperature curing organic anticorrosive material and its application provided by the present invention are described in detail below in conjunction with embodiments.

[0043] Table 1 Composition and weight percentage (by solid content weight %) in Comparative Example 1 and Examples 1-3

[0044]

[0045] Comparative Example 1

[0046] According to the dosage in Table 1, barium petroleum sulfonate and barium dinonylnaphthalene sulfonate are used as anticorrosive fillers, phosphate esters and organic amines are used as bonding promoting compounds, and alkyd resins and acrylic resins are used as film-forming resins. Then, the above substances are mixed with solvents. The exposed area of ​​the substrate is 150mm 2 The 2024-T3 aluminum plate was spray-coated with a coating thickness of 8μm and cured at room temperature. The results showed that the coating surface was dry in 30 minutes and the coating was completely cured in 12 hours; the neutral salt spray resistance time reached 60 hours.

[0047] Example 1

[0048] According to the dosage in Table 1, barium petroleum sulfonate and dodecenyl succinic acid are used as anticorrosive fillers (also known as corrosion inhibitors), phosphate esters and organic amines are used as bonding promoting compounds, and alkyd resins and acrylic resins are used as film-forming resins. Then, the above substances are mixed with solvents. The exposed area of ​​the substrate is 150mm 2 The 2024-T3 aluminum plate was spray-coated with a coating thickness of 25μm and cured at room temperature. The results showed that the coating surface dried in 80 minutes and the coating was completely cured in 24 hours. After 100 hours of neutral salt spray resistance test, the coating was intact and no failure occurred, and no corrosion occurred on the aluminum alloy substrate.

[0049] Example 2

[0050] According to the dosage in Table 1, barium dinonylnaphthalene sulfonate and dodecenyl succinic acid are used as anticorrosive fillers (also known as corrosion inhibitors), phosphate esters and organic amines are used as bonding promoting compounds, and alkyd resins and acrylic resins are used as film-forming resins. Then, the above substances are mixed with solvents. The exposed area of ​​the substrate is 150mm 2 The 2024-T3 aluminum plate was spray-coated with a coating thickness of 22μm and cured at room temperature. The results showed that the coating surface dried in 90 minutes and the coating was completely cured in 24 hours. After 100 hours of neutral salt spray resistance test, the coating was intact without failure and no corrosion occurred.

[0051] Example 3

[0052] According to the dosage in Table 1, barium petroleum sulfonate and barium dinonylnaphthalene sulfonate are used as anticorrosive fillers (also known as corrosion inhibitors), phosphate esters and organic amines are used as bonding promoting compounds, and alkyd resins and acrylic resins are used as film-forming resins. Then, the above substances are mixed with solvents. The exposed area of ​​the substrate is 150mm 2 The 2024-T3 aluminum plate was spray-coated with a coating thickness of 12μm and cured at room temperature. The results showed that the coating surface dried in 45 minutes and the coating was completely cured in 18 hours. After 100 hours of neutral salt spray resistance test, the coating was intact and did not fail, and there was no corrosion on the aluminum alloy substrate.

[0053] Table 2 shows the main properties of the anticorrosive coatings prepared according to the above comparative example 1 and examples 1-3. The corrosion resistance of the coatings was tested by a neutral salt spray test according to ASTM B117. Among them, ● indicates that a certain performance of the coating is very outstanding, ○ indicates that the performance meets the requirements, and × indicates that the performance does not meet the requirements.

[0054] Table 2 Main properties of the anticorrosion coatings prepared in Comparative Example 1 and Examples 1-3

[0055]

[0056]

[0057] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A room temperature curing organic anticorrosive material, characterized in that: By weight, it includes the following ingredients: 40-50 parts of film-forming resin, 1-20 parts of anticorrosive filler, 1-10 parts of a mixture containing phosphate ester, and 30-60 parts of a solvent; Wherein, the anticorrosive filler is selected from one or more of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium dinonylnaphthalene sulfonate, and dodecenylsuccinic acid; The mixture containing phosphate ester is selected from phosphate ester and organic amine; The film-forming resin is selected from alkyd resins and at least one unsaturated aliphatic polymer containing acrylate monomers.

2. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The unsaturated aliphatic polymer containing acrylate monomers is selected from the group consisting of self-polymers or copolymers of acrylate monomers, and polyesters or polyurethanes containing acrylate monomers.

3. The room temperature curing organic anticorrosive material according to claim 1 or 2, characterized in that: The acrylate monomer in the unsaturated aliphatic polymer is selected from one or more of methyl acrylate monomer, ethyl acrylate monomer, butyl acrylate monomer, methyl methacrylate monomer, isopropyl methyl acrylate monomer and isobornyl acrylate monomer.

4. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The solvent is selected from hydrocarbon solvents with a flash point of ≥60°C.

5. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The mass ratio of the phosphate ester to the organic amine is 1:(0.5-1.5).

6. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The room temperature curing organic anticorrosive material comprises the following components by weight: 40-45 parts of film-forming resin, 8-12 parts of anticorrosive filler, 5-8 parts of a mixture containing phosphate ester, and 40-50 parts of a solvent; Wherein, the anticorrosive filler is selected from any two of barium petroleum sulfonate, calcium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium dinonylnaphthalene sulfonate, and dodecenylsuccinic acid; The mixture containing phosphate ester is selected from phosphate ester and organic amine; The film-forming substance is selected from the group consisting of alkyd resins and self-polymers of acrylate monomers.

7. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The room temperature curing organic anticorrosive material comprises the following components by weight: 45 parts of film-forming resin, 10 parts of anticorrosive filler, 6 parts of a mixture containing phosphate ester, and 39 parts of a solvent; Wherein, the anticorrosive filler is selected from barium petroleum sulfonate and dodecenylsuccinic acid, or the anticorrosive filler is selected from barium dinonylnaphthalene sulfonate and dodecenylsuccinic acid; The mixture containing phosphate ester is selected from phosphate ester and organic amine in a mass ratio of 1:1; The film-forming substance is selected from an alkyd resin and an acrylic resin in a mass ratio of 4:5; The solvent is selected from D60 solvent oil.

8. The room temperature curing organic anticorrosive material according to claim 1, characterized in that: The room temperature curing organic anticorrosive material comprises the following components by weight: 40 parts of film-forming resin, 10 parts of anticorrosive filler, 6 parts of a mixture containing phosphate ester, and 44 parts of a solvent; Wherein, the anticorrosive filler is selected from barium petroleum sulfonate and barium dinonylnaphthalene sulfonate; The mixture containing phosphate ester is selected from phosphate ester and organic amine in a mass ratio of 1:1; The film-forming substance is selected from an alkyd resin and an acrylic resin in a mass ratio of 3:5; The solvent is selected from D60 solvent oil.

9. Use of the room temperature curing organic anticorrosive material according to any one of claims 1 to 8 in metal surface anticorrosion.

10. The use according to claim 9, characterized in that: The coating thickness of the room temperature curing organic anticorrosive material after curing on the metal surface is 8-25 μm; After the coating is applied on an aluminum alloy test plate and subjected to a 100-hour neutral salt spray test, the number of corrosion points (≥1 mm) is ≤3 / 64.5 cm. 2 .

Images