Fire-retardant high-temperature-resistant heat-insulating anticorrosive coating and preparation method thereof

Abstract

The present application relates to the technical field of paint, and proposes a kind of fire-retardant high-temperature-resistant heat-insulating anticorrosive paint and preparation method thereof.A kind of fire-retardant high-temperature-resistant heat-insulating anticorrosive paint, including component A, component B and component C;Component A includes the following components by mass fraction: epoxy modified silicone resin 70 parts, epoxy silane modified inorganic reinforcing filler 15~25 parts, leveling agent 1~2 parts, dispersing agent 2~4 parts, solvent 15~25 parts;Component B includes the following components by mass fraction: polyester modified silicone resin 30 parts, mercapto silane modified inorganic flame-retardant filler 20~30 parts, amino silane modified inorganic anticorrosive filler 8~14 parts, solvent 10~15 parts;Component C includes the following components by mass fraction: curing agent 7~12 parts, solvent 15~20 parts.By the above technical scheme, the problem of poor flame retardancy, low strength and poor corrosion resistance of the paint in the related art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular, to a kind of fire-retardant high-temperature-resistant heat-insulating anticorrosive paint and preparation method thereof. BACKGROUND

[0002] The fire-retardant high-temperature-resistant heat-insulating anticorrosive paint not only can maintain good heat-insulating performance at high temperature, but also has good fire resistance, which can effectively prevent fire and ensure the safety of industrial equipment and buildings. This kind of paint has a series of excellent properties, such as high temperature resistance, heat insulation, fire resistance, corrosion resistance, etc., and is widely used in various fields.

[0003] The existing fire-retardant high-temperature-resistant heat-insulating anticorrosive paint is all through adding inorganic fillers with different functions to make the paint have good comprehensive performance. For example, adding inorganic fire-retardant fillers such as magnesium hydroxide and aluminum hydroxide to improve the fire resistance of the paint, adding inorganic reinforcing fillers such as white carbon black, mica powder and talc powder to improve the strength of the paint, and adding inorganic anticorrosive fillers such as zinc oxide, zinc molybdate and graphene to improve the corrosion resistance of the paint. However, due to the poor compatibility of inorganic fillers with the matrix material of the paint, the fire resistance, strength and corrosion resistance of the paint need to be further improved. SUMMARY

[0004] The present application provides a kind of fire-retardant high-temperature-resistant heat-insulating anticorrosive paint and preparation method thereof, solve the problem of poor fire resistance, low strength and poor corrosion resistance of the paint in related art.

[0005] The technical scheme of the present application is as follows:

[0006] A kind of fire-retardant high-temperature-resistant heat-insulating anticorrosive paint, comprising component A, component B and component C;

[0007] The component A comprises the following components by mass fraction: epoxy modified silicone resin 70 parts, epoxy silane modified inorganic reinforcing filler 15-25 parts, leveling agent 1-2 parts, dispersant 2-4 parts, solvent 15-25 parts;

[0008] The component B comprises the following components by mass fraction: polyester modified silicone resin 30 parts, mercapto silane modified inorganic fire-retardant filler 20-30 parts, amino silane modified inorganic anticorrosive filler 8-14 parts, solvent 10-15 parts;

[0009] The component C comprises the following components by mass fraction: curing agent 7-12 parts, solvent 15-20 parts.

[0010] As a further technical scheme, the leveling agent in the component A can be any one or more leveling agents in the art, preferably one or both of Dow Corning DC-57 and BYK348.

[0011] As a further technical solution, the dispersant in component A can be any one or more dispersants in the art, preferably one or more of BYK191, BYK180, and SN-5040.

[0012] As a further technical solution, the curing agent in component C can be any one or more curing agents in the art, preferably one or two of tetraethyl orthosilicate and propyl orthosilicate.

[0013] As a further technical solution, the solvents in components A, B and C each independently include one or more of ethyl acetate, butyl acetate and cyclohexanone.

[0014] As a further technical solution, the raw materials for the epoxy silane modified inorganic reinforcing filler in component A include epoxy silane and inorganic reinforcing filler in a mass ratio of 0.1~0.5:1.

[0015] As a further technical solution, the epoxy silane can be any silane containing an epoxy group, preferably KH-560;

[0016] The inorganic reinforcing filler includes one or more of silica, mica powder, and talc powder.

[0017] As a further technical solution, the preparation method of the epoxy silane modified inorganic reinforcing filler includes the following steps: mixing the inorganic reinforcing filler with water evenly, adding epoxy silane for modification, filtering, and drying to obtain the epoxy silane modified inorganic reinforcing filler.

[0018] As a further technical solution, the raw materials for the mercaptosilane-modified inorganic flame retardant filler in component B include mercaptosilane and inorganic flame retardant filler in a mass ratio of 0.1~0.5:1;

[0019] The raw materials for the aminosilane-modified inorganic corrosion-resistant filler include aminosilane and inorganic corrosion-resistant filler in a mass ratio of 0.1 to 0.5:1.

[0020] As a further technical solution, the mercaptosilane can be any silane containing mercapto groups, preferably one or two of KH-590 and KH-580;

[0021] The inorganic flame-retardant filler includes one or two of magnesium hydroxide and aluminum hydroxide.

[0022] As a further technical solution, the preparation method of the mercaptosilane modified inorganic flame retardant filler includes the following steps: mixing the inorganic flame retardant filler with water evenly, adding mercaptosilane for modification, filtering, and drying to obtain the mercaptosilane modified inorganic flame retardant filler.

[0023] As a further technical solution, the aminosilane can be any silane containing an amino group, preferably one or two of KH-792 and KH-550;

[0024] The inorganic anti-corrosion filler includes one or more of zinc oxide, zinc molybdate, and graphene.

[0025] As a further technical solution, the preparation method of the aminosilane-modified inorganic anticorrosive filler includes the following steps: mixing the inorganic anticorrosive filler with water evenly, adding aminosilane for modification, filtering, and drying to obtain the aminosilane-modified inorganic anticorrosive filler.

[0026] As a further technical solution, the mass ratio of the mercaptosilane-modified inorganic flame retardant filler and the aminosilane-modified inorganic corrosion resistant filler to the epoxysilane-modified inorganic reinforcing filler is 35:18~23.

[0027] This invention limits the mass ratio of mercaptosilane-modified inorganic flame retardant filler and aminosilane-modified inorganic anti-corrosion filler to epoxysilane-modified inorganic reinforcing filler to 35:18~23, which further improves the strength and corrosion resistance of the coating.

[0028] As a further technical solution, the mass ratio of the mercaptosilane-modified inorganic flame retardant filler to the aminosilane-modified inorganic corrosion resistant filler is 5:2.

[0029] This invention limits the mass ratio of mercaptosilane-modified inorganic flame retardant filler and aminosilane-modified inorganic anti-corrosion filler to 5:2, which further improves the strength and corrosion resistance of the coating.

[0030] As a further technical solution, the epoxy silane-modified inorganic reinforcing filler in component A is an epoxy silane-modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid.

[0031] This invention further modifies epoxy-silane-modified inorganic reinforcing fillers with 2-amino-4-methoxybenzoic acid, thereby further improving the strength and corrosion resistance of the coating. The reason is that after modification with 2-amino-4-methoxybenzoic acid, the carboxyl groups of the epoxy-silane-modified inorganic reinforcing filler can react with some of the epoxy groups on the surface of the filler, resulting in a primary amine on the filler surface. The primary amine reacts with some of the epoxy groups to ultimately generate a tertiary amine, thus imparting a tertiary amine to the surface of the inorganic reinforcing filler. This tertiary amine acts as a catalyst for the reaction between the mercaptosilane-modified inorganic flame retardant filler and the epoxy groups, promoting the reaction between the mercaptosilane and epoxy groups. This allows the mercaptosilane-modified inorganic flame retardant filler to react with the epoxy groups in the matrix material immediately after mixing, further improving the overall compatibility of the coating and the dispersibility of the inorganic filler.

[0032] As a further technical solution, the raw materials of the 2-amino-4-methoxybenzoic acid modified epoxy silane modified inorganic reinforcing filler include 2-amino-4-methoxybenzoic acid, epoxy silane and inorganic reinforcing filler in a mass ratio of 0.03~0.05:0.1~0.5:1.

[0033] This invention limits the raw materials of the 2-amino-4-methoxybenzoic acid-modified epoxysilane-modified inorganic reinforcing filler to 2-amino-4-methoxybenzoic acid, epoxysilane and inorganic reinforcing filler in a mass ratio of 0.03~0.05:0.1~0.5:1, which further improves the strength and corrosion resistance of the coating.

[0034] As a further technical solution, the preparation method of the epoxy-silane modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid includes the following steps:

[0035] A1. Mix the inorganic reinforcing filler with water evenly, add epoxy silane for modification, filter, and dry to obtain epoxy silane modified inorganic reinforcing filler.

[0036] A2. The epoxy-silane modified inorganic reinforcing filler, 2-amino-4-methoxybenzoic acid and solvent are mixed evenly, modified, filtered and dried to obtain epoxy-silane modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid.

[0037] As a further technical solution, the modification temperature in A1 is 45~55℃, and the modification temperature in A2 is 130~150℃.

[0038] This invention also proposes a method for preparing a flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating, comprising the following steps:

[0039] S1. After mixing all the components of component A evenly, component A is obtained;

[0040] S2. After mixing all components of component B evenly, component B is obtained;

[0041] S3. After mixing all the components of component C evenly, component C is obtained;

[0042] S4. Mix the components A, B and C to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0043] As a further technical solution, during the mixing in S4, the mass ratio of component A to component B and the mass ratio of component B to component C are 10:1~2.

[0044] The working principle and beneficial effects of this invention are as follows:

[0045] This invention provides a flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating, comprising component A, component B, and component C. Component A includes epoxy-modified silicone resin, epoxy-silane-modified inorganic reinforcing filler, leveling agent, dispersant, and solvent. Component B includes polyester-modified silicone resin, mercaptosilane-modified inorganic flame-retardant filler, aminosilane-modified inorganic corrosion-resistant filler, and solvent. Component C includes a curing agent and solvent. The combined use of these three components synergistically improves the coating's strength and corrosion resistance. This is because mercaptosilane-modified inorganic flame-retardant filler and aminosilane-modified inorganic corrosion-resistant filler can react with epoxy groups. In this invention, the matrix material of the coating is mostly epoxy-modified silicone resin, and the inorganic reinforcing filler, after being modified with epoxy-silane, also has epoxy groups on its surface, improving the overall compatibility of the coating and the dispersibility of the inorganic filler, thereby enhancing the coating's strength and corrosion resistance. In addition, the coating provided by this invention also has good flame retardancy, high temperature resistance and heat insulation properties. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] In the following examples and comparative examples

[0048] The epoxy-modified silicone resin is epoxy-modified silicone resin 023-4;

[0049] The polyester-modified silicone resin is SH-022W.

[0050] The silica is Cabot M5 fumed silica produced by the gas phase method, with a particle size of 8000 mesh.

[0051] The particle size of the mica powder is 1250 mesh;

[0052] The particle size of talc is 1250 mesh;

[0053] The particle size of magnesium hydroxide is 3000 mesh;

[0054] The aluminum hydroxide is aluminum hydroxide H-WF-8, with a particle size of 3000 mesh;

[0055] The zinc oxide is active nano zinc oxide with a particle size of 50 nm;

[0056] The particle size of zinc molybdate is 9~10μm;

[0057] The particle size of graphene is 4000 mesh.

[0058] Example 1

[0059] S1. Mix 30g of silica with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler.

[0060] S2. Mix 30g of aluminum hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-590 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic flame retardant filler.

[0061] S3. Mix 30g of zinc oxide with 300g of water, stir at 5000rpm for 9 hours, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-792 and continue stirring for 2 hours, filter, wash with water, and dry to obtain aminosilane modified inorganic anticorrosive filler.

[0062] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of epoxy-silane-modified inorganic reinforcing filler, 1.5 parts of Dow Corning DC-57, 3 parts of BYK191, and 20 parts of ethyl acetate at 2000 rpm for 20 min to obtain component A.

[0063] S5. Mix 30 parts of polyester-modified silicone resin, 25 parts of mercaptosilane-modified inorganic flame retardant filler, 10 parts of aminosilane-modified inorganic anticorrosive filler, and 13 parts of ethyl acetate at 2000 rpm for 20 min to obtain component B.

[0064] S6. Mix 10 parts of tetraethyl orthosilicate and 18 parts of ethyl acetate at 500 rpm for 20 min to obtain component C;

[0065] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0066] Example 2

[0067] S1. Mix 30g of mica powder with 300g of water, stir at 5000rpm for 9h, heat to 55℃, adjust the speed to 500rpm, add 9g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler.

[0068] S2. Mix 30g of magnesium hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 55℃, adjust the speed to 500rpm, add 9g of KH-580 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic flame retardant filler.

[0069] S3. Mix 30g of zinc molybdate with 300g of water, stir at 5000rpm for 9h, heat to 55℃, adjust the speed to 500rpm, add 9g of KH-792 and continue stirring for 2h, filter, wash with water, and dry to obtain aminosilane modified inorganic anticorrosive filler.

[0070] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of epoxy-silane-modified inorganic reinforcing filler, 1 part of BYK348, 2 parts of BYK180, and 15 parts of butyl acetate at 2000 rpm for 20 min to obtain component A.

[0071] S5. Mix 30 parts of polyester-modified silicone resin, 20 parts of mercaptosilane-modified inorganic flame retardant filler, 8 parts of aminosilane-modified inorganic anti-corrosion filler, and 10 parts of butyl acetate at 2000 rpm for 20 min to obtain component B.

[0072] S6. Mix 7 parts of propyl orthosilicate and 15 parts of butyl acetate at 500 rpm for 20 min to obtain component C;

[0073] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:10 to the mixture and mixing continues to produce a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0074] Example 3

[0075] S1. Mix 30g of talc powder with 300g of water, stir at 5000rpm for 9h, heat to 45℃, adjust the speed to 500rpm, add 15g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler.

[0076] S2. Mix 30g of magnesium hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 45℃, adjust the speed to 500rpm, add 15g of KH-580 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic flame retardant filler.

[0077] S3. Mix 30g of graphene with 300g of water, stir at 5000rpm for 9h, heat to 45℃, adjust the speed to 500rpm, add 15g of KH-792 and continue stirring for 2h, filter, wash with water, and dry to obtain aminosilane modified inorganic anticorrosive filler.

[0078] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of epoxy-silane-modified inorganic reinforcing filler, 2 parts of BYK348, 4 parts of SN-5040, and 25 parts of cyclohexanone at 2000 rpm for 20 min to obtain component A.

[0079] S5. Mix 30 parts of polyester-modified silicone resin, 30 parts of mercaptosilane-modified inorganic flame retardant filler, 14 parts of aminosilane-modified inorganic anti-corrosion filler, and 15 parts of cyclohexanone at 2000 rpm for 20 min to obtain component B.

[0080] S6. Mix 12 parts of propyl orthosilicate and 20 parts of cyclohexanone at 500 rpm for 20 min to obtain component C;

[0081] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0082] Example 4

[0083] The only difference from Example 1 is that 18 parts of epoxy silane modified inorganic reinforcing filler were used.

[0084] Example 5

[0085] The only difference from Example 1 is that 20 parts of epoxy silane modified inorganic reinforcing filler were used.

[0086] Example 6

[0087] The only difference from Example 1 is that 23 parts of epoxy silane modified inorganic reinforcing filler were used.

[0088] Example 7

[0089] The only difference from Example 1 is that 25 parts of epoxy silane modified inorganic reinforcing filler were used.

[0090] Example 8

[0091] The only difference from Example 5 is that: 21 parts of mercaptosilane-modified inorganic flame retardant filler and 14 parts of aminosilane-modified inorganic anti-corrosion filler are used.

[0092] Example 9

[0093] The only difference from Example 5 is that: 27 parts of mercaptosilane-modified inorganic flame retardant filler and 8 parts of aminosilane-modified inorganic anti-corrosion filler.

[0094] Example 10

[0095] S1. Mix 30g of silica with 300g of water, stir at 5000rpm for 9h, then heat to 50℃, adjust the stirring speed to 500rpm, add 3g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler; mix the obtained epoxy silane modified inorganic reinforcing filler with 0.3g of 2-amino-4-methoxybenzoic acid and 300g of dimethyl sulfoxide evenly, react at 500rpm and 140℃ for 45min, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid;

[0096] S2. Mix 30g of aluminum hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-590 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic flame retardant filler.

[0097] S3. Mix 30g of zinc oxide with 300g of water, stir at 5000rpm for 9 hours, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-792 and continue stirring for 2 hours, filter, wash with water, and dry to obtain aminosilane modified inorganic anticorrosive filler.

[0098] S4. Mix 70 parts of epoxy-modified silicone resin, 20 parts of epoxy-silane-modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid, 1.5 parts of Dow Corning DC-57, 3 parts of BYK191, and 20 parts of ethyl acetate in a 2000 rpm stirring solution for 20 min to obtain component A.

[0099] S5. Mix 30 parts of polyester-modified silicone resin, 25 parts of mercaptosilane-modified inorganic flame retardant filler, 10 parts of aminosilane-modified inorganic anticorrosive filler, and 13 parts of ethyl acetate at 2000 rpm for 20 min to obtain component B.

[0100] S6. Mix 10 parts of tetraethyl orthosilicate and 18 parts of ethyl acetate at 500 rpm for 20 min to obtain component C;

[0101] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0102] Example 11

[0103] The only difference from Example 10 is: 0.9g of 2-amino-4-methoxybenzoic acid.

[0104] Example 12

[0105] The only difference from Example 10 is the addition of 1.5g of 2-amino-4-methoxybenzoic acid.

[0106] Example 13

[0107] The only difference from Example 10 is: 2.4g of 2-amino-4-methoxybenzoic acid.

[0108] Comparative Example 1

[0109] S1. Mix 30g of silica with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic reinforcing filler.

[0110] S2. Mix 30g of aluminum hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic flame retardant filler.

[0111] S3. Mix 30g of zinc oxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-560 and continue stirring for 2h, filter, wash with water, and dry to obtain epoxy silane modified inorganic anticorrosive filler.

[0112] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of epoxy-silane-modified inorganic reinforcing filler, 1.5 parts of Dow Corning DC-57, 3 parts of BYK191, and 20 parts of ethyl acetate at 2000 rpm for 20 min to obtain component A.

[0113] S5. Mix 30 parts of polyester-modified silicone resin, 25 parts of epoxy silane-modified inorganic flame retardant filler, 10 parts of epoxy silane-modified inorganic anti-corrosion filler, and 13 parts of ethyl acetate at 2000 rpm for 20 min to obtain component B.

[0114] S6. Mix 10 parts of tetraethyl orthosilicate and 18 parts of ethyl acetate at 500 rpm for 20 min to obtain component C;

[0115] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0116] Comparative Example 2

[0117] S1. Mix 30g of silica with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-590 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic reinforcing filler.

[0118] S2. Mix 30g of aluminum hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-590 and continue stirring for 2h, filter, wash with water, and dry to obtain mercaptosilane modified inorganic flame retardant filler.

[0119] S3. Mix 30g of zinc oxide with 300g of water, stir at 5000rpm for 9 hours, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-590 and continue stirring for 2 hours, filter, wash with water, and dry to obtain mercaptosilane modified inorganic anticorrosive filler.

[0120] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of mercaptosilane-modified inorganic reinforcing filler, 5 parts of Dow Corning DC-571, 3 parts of BYK191, and 20 parts of ethyl acetate at 2000 rpm for 20 min to obtain component A.

[0121] S5. Mix 30 parts of polyester-modified silicone resin, 25 parts of mercaptosilane-modified inorganic flame retardant filler, 10 parts of mercaptosilane-modified inorganic anticorrosive filler, and 13 parts of ethyl acetate at 2000 rpm for 20 min to obtain component B.

[0122] S6. Mix 10 parts of tetraethyl orthosilicate and 18 parts of ethyl acetate at 500 rpm for 20 min to obtain component C;

[0123] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0124] Comparative Example 3

[0125] S1. Mix 30g of silica with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-792 and continue stirring for 2h, filter, wash with water, and dry to obtain aminosilane modified inorganic reinforcing filler.

[0126] S2. Mix 30g of aluminum hydroxide with 300g of water, stir at 5000rpm for 9h, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-792 and continue stirring for 2h, filter, wash with water, and dry to obtain aminosilane modified inorganic flame retardant filler.

[0127] S3. Mix 30g of zinc oxide with 300g of water, stir at 5000rpm for 9 hours, heat to 50℃, adjust the speed to 500rpm, add 3g of KH-792 and continue stirring for 2 hours, filter, wash with water, and dry to obtain aminosilane modified inorganic anticorrosive filler.

[0128] S4. Mix 70 parts of epoxy-modified silicone resin, 15 parts of aminosilane-modified inorganic reinforcing filler, 5 parts of Dow Corning DC-571, 3 parts of BYK191, and 20 parts of ethyl acetate in a 2000 rpm stirring solution for 20 min to obtain component A.

[0129] S5. Mix 30 parts of polyester modified silicone resin, 25 parts of aminosilane modified inorganic flame retardant filler, 10 parts of aminosilane modified inorganic anticorrosive filler, and 13 parts of ethyl acetate in a 2000 rpm stirring solution for 20 min to obtain component B.

[0130] S6. Mix 10 parts of tetraethyl orthosilicate and 18 parts of ethyl acetate at 500 rpm for 20 min to obtain component C;

[0131] S7. After mixing component A and component B evenly, a mixture is obtained. Component C is added at a mass ratio of 100:15 to the mixture and mixing is continued to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

[0132] The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings obtained in Examples 1-13 and Comparative Examples 1-3 were applied and cured to obtain a 1 mm thick coating. Tensile strength was tested according to the method in GB / T 16777-2008. The samples were treated in a 20% sulfuric acid solution at a constant temperature of 60°C, and the time for corrosion was observed. The results are recorded in Table 1. A constant temperature treatment at 500°C for 30 min was used to evaluate the high-temperature resistance and flame retardancy of the coatings; the phenomena were observed and recorded. The results are recorded in Table 2.

[0133] Table 1 Tensile strength and corrosion resistance of flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings

[0134]

[0135] As can be seen from Table 1, the flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating provided by this invention has high tensile strength and good corrosion resistance.

[0136] Compared with Comparative Examples 1-3, Examples 1-13 contain epoxy-silane modified inorganic reinforcing fillers, mercaptosilane modified inorganic flame-retardant fillers, and aminosilane modified inorganic anti-corrosion fillers; Comparative Example 1 contains epoxy-silane modified inorganic reinforcing fillers, epoxy-silane modified inorganic flame-retardant fillers, and epoxy-silane modified inorganic anti-corrosion fillers; Comparative Example 2 contains mercaptosilane modified inorganic reinforcing fillers, mercaptosilane modified inorganic flame-retardant fillers, and mercaptosilane modified inorganic anti-corrosion fillers. Inorganic anti-corrosion fillers were added to Comparative Example 3. The tensile strength and corrosion resistance of the flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings obtained in Examples 1-13 were better than those in Comparative Examples 1-3. This indicates that the combined use of epoxy silane-modified inorganic reinforcing fillers, mercaptosilane-modified inorganic flame-retardant fillers, and aminosilane-modified inorganic anti-corrosion fillers can improve the strength and corrosion resistance of the coating.

[0137] The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings obtained in Examples 4-6 have better tensile strength and corrosion resistance than those in Examples 1 and 7. This indicates that when the mass ratio of mercaptosilane-modified inorganic flame-retardant filler and aminosilane-modified inorganic anti-corrosion filler to epoxysilane-modified inorganic reinforcing filler is 35:18-23, the strength and corrosion resistance of the coating can be further improved.

[0138] The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating obtained in Example 5 has better tensile strength and corrosion resistance than that in Examples 8 and 9, indicating that when the mass ratio of mercaptosilane-modified inorganic flame-retardant filler to aminosilane-modified inorganic anti-corrosion filler is 5:2, the strength and corrosion resistance of the coating can be further improved.

[0139] The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings obtained in Examples 10-13 have better tensile strength and corrosion resistance than those in Example 5, indicating that 2-amino-4-methoxybenzoic acid can further improve the strength and corrosion resistance of the coating by modifying the epoxy silane-modified inorganic reinforcing filler.

[0140] The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings obtained in Examples 11-12 have better tensile strength and corrosion resistance than those in the other examples, indicating that when the mass ratio of 2-amino-4-methoxybenzoic acid, epoxy silane, and inorganic reinforcing filler is 0.03-0.05:0.1-0.5:1, the strength and corrosion resistance of the coating can be further improved.

[0141] Table 2. High-temperature resistance and flame retardancy of flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coatings

[0142]

[0143] As can be seen from Table 2, the flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating provided by this invention has good high-temperature resistance and flame retardancy.

[0144] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating, characterized in that, Includes component A, component B, and component C; Component A comprises the following components in parts by weight: 70 parts of epoxy-modified silicone resin, 15-25 parts of epoxy-silane-modified inorganic reinforcing filler, 1-2 parts of leveling agent, 2-4 parts of dispersant, and 15-25 parts of solvent. Component B comprises the following components in parts by weight: 30 parts of polyester modified silicone resin, 20-30 parts of mercaptosilane modified inorganic flame retardant filler, 8-14 parts of aminosilane modified inorganic anti-corrosion filler, and 10-15 parts of solvent. Component C comprises the following components in parts by weight: 7-12 parts curing agent and 15-20 parts solvent.

2. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 1, characterized in that, The raw materials for the epoxy silane-modified inorganic reinforcing filler in component A include epoxy silane and inorganic reinforcing filler in a mass ratio of 0.1~0.5:

1.

3. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 1, characterized in that, The raw materials for the mercaptosilane-modified inorganic flame retardant filler in component B include mercaptosilane and inorganic flame retardant filler in a mass ratio of 0.1~0.5:

1. The raw materials for the aminosilane-modified inorganic corrosion-resistant filler include aminosilane and inorganic corrosion-resistant filler in a mass ratio of 0.1 to 0.5:

1.

4. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 1, characterized in that, The mass ratio of the mercaptosilane-modified inorganic flame retardant filler and the aminosilane-modified inorganic corrosion resistant filler to the epoxysilane-modified inorganic reinforcing filler is 35:18~23.

5. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 4, characterized in that, The mass ratio of the mercaptosilane-modified inorganic flame retardant filler to the aminosilane-modified inorganic corrosion resistant filler is 5:

2.

6. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 1, characterized in that, The epoxy silane-modified inorganic reinforcing filler in component A is an epoxy silane-modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid.

7. The flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating according to claim 6, characterized in that, The raw materials for the 2-amino-4-methoxybenzoic acid-modified epoxysilane-modified inorganic reinforcing filler include 2-amino-4-methoxybenzoic acid, epoxysilane, and inorganic reinforcing filler in a mass ratio of 0.03~0.05:0.1~0.5:

1.

8. The flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating according to claim 7, characterized in that, The preparation method of the epoxy-silane modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid includes the following steps: A1. Mix the inorganic reinforcing filler with water evenly, add epoxy silane for modification, filter, and dry to obtain epoxy silane modified inorganic reinforcing filler. A2. The epoxy-silane modified inorganic reinforcing filler, 2-amino-4-methoxybenzoic acid and solvent are mixed evenly, modified, filtered and dried to obtain epoxy-silane modified inorganic reinforcing filler modified with 2-amino-4-methoxybenzoic acid.

9. The flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating according to claim 8, characterized in that, The modification temperature in A1 is 45~55℃, and the modification temperature in A2 is 130~150℃.

10. A method for preparing a flame-retardant, high-temperature resistant, heat-insulating, and corrosion-resistant coating according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. After mixing all the components of component A evenly, component A is obtained; S2. After mixing all components of component B evenly, component B is obtained; S3. After mixing all the components of component C evenly, component C is obtained; S4. Mix the components A, B and C to obtain a flame-retardant, high-temperature resistant, heat-insulating, and anti-corrosion coating.

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