CN113717637A - High-temperature-resistant anticorrosive paint and preparation method thereof - Google Patents

High-temperature-resistant anticorrosive paint and preparation method thereof Download PDF

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CN113717637A
CN113717637A CN202111040964.5A CN202111040964A CN113717637A CN 113717637 A CN113717637 A CN 113717637A CN 202111040964 A CN202111040964 A CN 202111040964A CN 113717637 A CN113717637 A CN 113717637A
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parts
temperature
organic silicon
resistant anticorrosive
silicon resin
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CN113717637B (en
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张胜军
张宗健
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Henan Sankeshu New Material Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D183/00Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04Polysiloxanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D183/00Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04Polysiloxanes
    • C09D183/06Polysiloxanes containing silicon bound to oxygen-containing groups
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18Fireproof paints including high temperature resistant paints
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/08Metals
    • C08K2003/0812Aluminium
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/05Polymer mixtures characterised by other features containing polymer components which can react with one another

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

The invention relates to a high-temperature-resistant anticorrosive paint and a preparation method thereof, wherein the high-temperature-resistant anticorrosive paint is prepared from the following components in parts by mass: 5-10 parts of flexible quick-drying resin, 10-30 parts of A organic silicon resin, 10-20 parts of B organic silicon resin, 10-30 parts of aluminum paste, 10-20 parts of filler, 10-20 parts of composite environment-friendly solvent, 0.2-1 part of catalyst, 0.5-1 part of rheological additive and 0.2-0.5 part of dispersing agent; the high-temperature-resistant anticorrosive coating is single-component, does not need pre-baking, has excellent adhesive force and salt spray resistance after being subjected to high temperature of 600 ℃ for 6 hours, and has long-acting anticorrosive performance.

Description

High-temperature-resistant anticorrosive paint and preparation method thereof
Technical Field
The invention relates to the field of high-temperature-resistant anticorrosive coatings, in particular to a high-temperature-resistant anticorrosive coating and a preparation method thereof.
Background
With the development of science and technology, the requirements of people on materials are also continuously improved, higher temperature is often required to be overcome, higher corrosion resistance is achieved, and the research personnel are urgently required to develop high-temperature resistant coatings with the temperature of 500 ℃ and even higher to meet the harsh requirements of application environments. Silicone resins are widely used as good high temperature resistant resins. However, pure silicone resin has the disadvantages of long curing time, low coating adhesion at high temperature, low mechanical strength and the like, and the application of the pure silicone resin is limited. Since the molecular structure of the silicone resin still retains active groups such as hydroxyl, the modification of the silicone resin is more possible. However, the following problems still exist at present: 1. the drying condition is limited, and the self-drying is slow or the curing can be realized only by baking; 2. after high temperature resistance, the performance influence is large, such as salt spray resistance, adhesive force and the like are obviously reduced, and the long-term heat-resistant protection is not facilitated.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides the high-temperature-resistant anticorrosive coating and the preparation method thereof.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the high-temperature-resistant anticorrosive paint is prepared from the following components in parts by mass:
5-10 parts of flexible quick-drying resin, 10-30 parts of A organic silicon resin, 10-20 parts of B organic silicon resin, 10-30 parts of aluminum paste, 10-20 parts of filler, 10-20 parts of composite environment-friendly solvent, 0.2-1 part of catalyst, 0.5-1 part of rheological additive and 0.2-0.5 part of dispersing agent;
the A organic silicon resin is a xylene solution of organic silicon resin containing methyl/phenyl groups;
the B organic silicon resin is a polymer containing a large number of alkoxy functional groups.
Further, the flexible quick-drying resin is organosilicon modified acrylic resin.
Further, the aluminum paste is non-floating type or floating type aluminum paste.
Further, the filler is one or a mixture of more than two of mica powder, talcum powder and glass powder mixed in any proportion.
Further, the composite environment-friendly solvent is a mixture formed by mixing one or more than two of dimethylbenzene, trimethylbenzene, butanol and butyl acetate in any proportion.
Further, the catalyst is a titanate.
Further, the rheological additive is one or two of bentonite and fumed silica.
A preparation method of a high-temperature-resistant anticorrosive paint comprises the following steps:
dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
By adding the flexible quick-drying resin, the dryness and the adhesive force of a paint film can be obviously improved; the alkoxy functional group in the organic silicon resin B is combined with a catalyst, and hydrolysis-condensation reaction is carried out at normal temperature, so that the heat resistance of a normal-temperature self-drying paint film is guaranteed; when the temperature rises in a temperature-resistant environment, the organic silicon resin A and the organic silicon resin B are subjected to further crosslinking reaction, so that the high-temperature durability and the corrosion resistance of the paint film are further improved.
According to the invention, the single-component normal-temperature quick-drying high-temperature-resistant coating is prepared by mixing the flexible quick-drying resin and two different organic silicon resins, and the adhesion and the salt spray resistance are still excellent after the temperature is increased by 6 hours at 600 ℃.
Compared with the prior art, the invention has the following beneficial effects
1. The invention can obviously improve the dryness and adhesive force of the paint film by adding the flexible quick-drying resin.
2. According to the invention, the alkoxy functional group in the organic silicon resin B is combined with the catalyst, and hydrolysis-condensation reaction is carried out at normal temperature, so that the heat resistance of the room-temperature self-drying paint film is ensured.
3. When the temperature of the paint film rises in a temperature-resistant environment, the organic silicon resin A and the organic silicon resin B are subjected to further crosslinking reaction, so that the high-temperature durability and the corrosion resistance of the paint film are further improved.
4. According to the invention, through the blending of the filler, the aluminum paste and the organic silicon resin, the paint film has shielding effect while being high temperature resistant and compact, so that a longer salt spray effect is achieved, and the long-acting anti-corrosion performance is achieved.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
The high-temperature-resistant anticorrosive paint is prepared from the following components in parts by mass:
5-10 parts of flexible quick-drying resin, 10-30 parts of A organic silicon resin, 10-20 parts of B organic silicon resin, 10-30 parts of aluminum paste, 10-20 parts of filler, 10-20 parts of composite environment-friendly solvent, 0.2-1 part of catalyst, 0.5-1 part of rheological additive and 0.2-0.5 part of dispersing agent;
the A organic silicon resin is a xylene solution of organic silicon resin containing methyl/phenyl groups;
the B organic silicon resin is a polymer containing a large number of alkoxy functional groups.
Further, the flexible quick-drying resin is organosilicon modified acrylic resin.
Further, the aluminum paste is non-floating type or floating type aluminum paste.
Further, the filler is one or a mixture of more than two of mica powder, talcum powder and glass powder mixed in any proportion.
Further, the composite environment-friendly solvent is a mixture formed by mixing one or more than two of dimethylbenzene, trimethylbenzene, butanol and butyl acetate in any proportion.
Further, the catalyst is a titanate.
Further, the rheological additive is one or two of bentonite and fumed silica.
A preparation method of a high-temperature-resistant anticorrosive paint comprises the following steps:
dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. While the following shows exemplary embodiments of the invention, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
A high-temperature-resistant anticorrosive paint comprises
6 parts of flexible quick-drying resin, 24 parts of A organic silicon resin, 12 parts of B organic silicon resin, 20 parts of aluminum paste, 15 parts of filler, 15 parts of composite environment-friendly solvent, 0.5 part of catalyst, 1 part of fumed silica (rheological additive) and 0.5 part of dispersing agent.
Dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
Wherein the filler is mica powder; the composite environment-friendly solvent comprises 4 parts of dimethylbenzene, 8 parts of trimethylbenzene and 3 parts of butanol; the catalyst is titanate.
Example 2
A high-temperature-resistant anticorrosive paint comprises
10 parts of flexible quick-drying resin, 28 parts of A organic silicon resin, 20 parts of B organic silicon resin, 26 parts of aluminum paste, 12 parts of filler, 18 parts of composite environment-friendly solvent, 0.8 part of catalyst, 1 part of bentonite (rheological additive) and 0.2 part of dispersing agent.
Dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
Wherein, the filler is 8 parts of mica powder and 4 parts of glass powder, and the composite environment-friendly solvent is 6 parts of dimethylbenzene, 5 parts of trimethylbenzene and 4 parts of butanol.
Example 3
A high-temperature-resistant anticorrosive paint comprises
5 parts of flexible quick-drying resin, 30 parts of A organic silicon resin, 10 parts of B organic silicon resin, 10 parts of aluminum paste, 20 parts of filler, 10 parts of composite environment-friendly solvent, 0.2 part of catalyst, 0.5 part of fumed silica (rheological additive), 0.3 part of bentonite and 0.4 part of dispersant.
Dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
Wherein, the filler is 10 parts of talcum powder and 10 parts of mica powder, and the composite environment-friendly solvent is dimethylbenzene.
Example 4
A high-temperature-resistant anticorrosive paint comprises
8 parts of flexible quick-drying resin, 10 parts of A organic silicon resin, 18 parts of B organic silicon resin, 30 parts of aluminum paste, 10 parts of filler, 20 parts of composite environment-friendly solvent, 0.4 part of catalyst, 0.5 part of fumed silica (rheological additive) and 0.3 part of dispersing agent.
Dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, other auxiliaries and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25 mu m, then adding the organic silicon resin A, the organic silicon resin B, the aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
Wherein, the filler is 10 parts of glass powder, and the composite environment-friendly solvent is 5 parts of dimethylbenzene, 10 parts of trimethylbenzene and 5 parts of butyl ester.
The above embodiments
Product information of flexible quick-drying resin: the organic silicon modified acrylic resin is solid, has an average molecular weight of 50000-100000 and a glass transition temperature of 50-100 ℃.
Product information of silicone resin: is a xylene solution of a silicone resin containing methyl/phenyl groups, e.g. Dow
Figure BDA0003249190520000051
RSN-0806Resin, EVONIK company LIKOPHEN P80, WACKER company SILRES _ REN 60, or SILRES-REN-80.
B product information of the silicone resin: polymers containing a large number of alkoxy functional groups, such as SILIKOPHEN _ AC _1000_ ZH from EVONIK or SILRES _ MSE100 from WACKER.
The key point in the embodiment is that the flexible quick-drying resin is mixed with two different organic silicon resins, so that the dryness, flexibility, adhesive force and salt mist resistance of a paint film are improved while the heat resistance is not reduced.
When in use, the products obtained in the embodiments 1-4 are filtered by a 100-200-mesh filter screen and then directly sprayed on the treated metal base material.
The high temperature resistant coating obtained in example 1 was compared with a commercially available high temperature resistant coating to obtain data as shown in Table 1.
TABLE 1
Figure BDA0003249190520000061
From the data in table 1: all the performances of the embodiment 1 of the invention are obviously higher than the technical indexes, especially the flexibility, adhesive force and salt spray time resistance after drying and high temperature resistance, and the high temperature resistant anticorrosive coating prepared by the preparation method of the combination of the components in the embodiment 1 of the invention has high performances, especially the performances of high adhesive force, high salt spray time resistance and the like. The flexibility, the adhesive force and the salt spray resistance after high temperature resistance are all the results obtained by testing after the temperature is increased by 6 hours at 600 ℃ and cooled to room temperature.
Experiments show that: the high-temperature-resistant anticorrosive paint obtained in the embodiments 1 to 4 is a single-component normal-temperature self-drying paint, is relatively quick to dry, is good in flexibility and adhesive force, and still has relatively high adhesive force and salt fog resistance after high temperature resistance. The high-temperature-resistant coating has the highest salt spray resistance after high temperature resistance in example 1, the dryness of example 2 is higher than that of example 1, and example 3 has long-term high-temperature-resistant stability. Example 4 has the best adhesion.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A high-temperature-resistant anticorrosive paint is characterized in that: the composition is prepared from the following components in parts by mass:
5-10 parts of flexible quick-drying resin, 10-30 parts of A organic silicon resin, 10-20 parts of B organic silicon resin, 10-30 parts of aluminum paste, 10-20 parts of filler, 10-20 parts of composite environment-friendly solvent, 0.2-1 part of catalyst, 0.5-1 part of rheological additive and 0.2-0.5 part of dispersing agent;
the A organic silicon resin is a xylene solution of organic silicon resin containing methyl/phenyl groups;
the B organic silicon resin is a polymer containing a large number of alkoxy functional groups.
2. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the flexible quick-drying resin is organic silicon modified acrylic resin.
3. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the aluminum paste is non-floating type or floating type aluminum paste.
4. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the filler is one or a mixture of more than two of mica powder, talcum powder and glass powder which are mixed in any proportion.
5. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the composite environment-friendly solvent is a mixture formed by mixing one or more than two of dimethylbenzene, trimethylbenzene, butanol and butyl acetate in any proportion.
6. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the catalyst is titanate.
7. The high-temperature-resistant anticorrosive paint according to claim 1, characterized in that: the rheological additive is formed by mixing one or two of bentonite and fumed silica according to any proportion.
8. A method for preparing a high temperature resistant anticorrosive paint according to any one of claims 1 to 7, characterized in that it comprises the following steps:
dissolving flexible quick-drying resin in a part of composite environment-friendly solvent, then adding a catalyst, a dispersing agent, a rheological aid and a filler at a stirring speed of 200-2000 r/min, then dispersing at a rotation speed of 800-2000r/min until the fineness is less than 25um, then adding the organic silicon resin A, the organic silicon resin B, aluminum paste and the residual composite environment-friendly solvent, and dispersing until the mixture is uniform to obtain the high-temperature-resistant anticorrosive coating.
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