CN108178984B - High-temperature-resistant heavy-duty anticorrosive paint for stainless steel - Google Patents
High-temperature-resistant heavy-duty anticorrosive paint for stainless steel Download PDFInfo
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- CN108178984B CN108178984B CN201711362743.3A CN201711362743A CN108178984B CN 108178984 B CN108178984 B CN 108178984B CN 201711362743 A CN201711362743 A CN 201711362743A CN 108178984 B CN108178984 B CN 108178984B
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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
- C09D183/00—Coating 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
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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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
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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
- C09D5/18—Fireproof paints including high temperature resistant 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
- C08K2003/2251—Oxides; Hydroxides of metals of chromium
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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a high-temperature-resistant heavy-duty anticorrosive paint for stainless steel, which comprises A, B components, wherein the A component comprises the following raw materials in percentage by mass: 25.0-40.0% of modified epoxy organic silicon resin with the epoxy value of 0.03-0.08 and the mass solid content of 50 +/-1%; an auxiliary agent I2.0 percent which comprises a dispersing agent, a defoaming agent, a base material wetting agent and a rheological auxiliary agent; 58.0-73.0% of inorganic pigment and filler; the weight percentage of each raw material in the component B is as follows: 99.0-99.5% of modified alicyclic amine with active hydrogen equivalent of 113 and 100% of mass solid content; 0.5-1.0% of an auxiliary agent II; a, B components are mixed according to the mass ratio of 100: 2.2-3.52 before coating. The double components of the invention can perform self-crosslinking reaction at normal temperature without high-temperature heating and curing; the construction is simple and convenient, is not influenced by seasons, and has good adhesive force; the surface of the stainless steel pipeline and equipment can be effectively protected in the environment at the high temperature of 300 ℃, and the stainless steel pipeline and equipment has excellent acid resistance, alkali resistance, salt resistance, oil resistance, water resistance and salt mist resistance and high cost performance.
Description
Technical Field
The invention relates to the technical field of paint research and preparation, in particular to a high-temperature (below 300 ℃) resistant heavy-duty (corrosion) paint for pipelines and equipment which are made of stainless steel in the petrochemical industry.
Background
Stainless steel materials have been widely used in many industrial fields, especially in the petrochemical industry, due to their unique material properties. Due to its industrial nature, the petrochemical industry has particularly strict requirements for pipelines and equipment, and therefore, stainless steel materials are used in many cases.
Although stainless steel materials have a certain rust-proof and corrosion-proof function, the surfaces of stainless steel pipes and equipment are also susceptible to attack and corrosion in special industrial environments or corrosive media, such as marine environments and environments containing corrosive media such as chlorine, or high-temperature environments. Therefore, for the problems of high temperature resistance and corrosion resistance of stainless steel, people often adopt an anodic oxidation method, an electrochemical method, corrosion inhibitor addition or anticorrosion coating for surface corrosion resistance. However, at present, there appears to be no coating product which can resist high temperature below 300 ℃ and has a heavy anti-corrosion (corrosion) function, and there are few reports.
Disclosure of Invention
The invention aims to overcome the defects and provide a high-temperature-resistant heavy-duty anticorrosive coating for stainless steel, which adopts an epoxy silicone resin-based component A which is modified by epoxy groups and has good adhesion to a base material and a modified alicyclic amine curing agent-based component B, and can be cured to form a film through two curing modes, wherein one curing mode is as follows: self-crosslinking reaction at normal temperature without high-temperature heating and curing; the other curing mode is as follows: after the self-crosslinking reaction at normal temperature, the post-curing of the coating is further promoted by the temperature in the subsequent high-temperature working environment. The invention can effectively protect the stainless steel material in the environment with the high temperature of 300 ℃, has good salt spray resistance and chemical resistance, has good adhesive force to the stainless steel material after low surface treatment or sand blasting treatment, and has easy operation and high cost performance.
In order to achieve the purpose, the invention adopts the following technical scheme.
The high-temperature-resistant heavy-duty anticorrosive paint for stainless steel comprises a component A and a component B, and is characterized in that the component A comprises the following raw materials in percentage by mass:
25.0-40% of modified epoxy organic silicon resin;
2.0% of an auxiliary agent I;
58-73% of inorganic pigment and filler;
the component B comprises the following raw materials in percentage by weight:
99.0-99.5% of modified alicyclic amine;
0.5-1.0% of an auxiliary agent II;
before coating, the component A and the component B are mixed according to the mass ratio of A to B =100 to 2.2-3.52 for use.
Further, the epoxy value of the modified epoxy organic silicon resin is 0.03-0.08, and the mass solid content is 50 +/-1%.
Further, the active hydrogen equivalent of the modified alicyclic amine is 113, and the mass solid content is 100%.
Further, the auxiliary agent I comprises a dispersing agent, a defoaming agent, a base material wetting agent and a rheological auxiliary agent.
Further, the auxiliary agent II is a mercapto-polysiloxane adhesion promoter.
Further, the inorganic pigment and filler comprises graphene, environment-friendly chromium oxide green, barite powder and talcum powder.
The high-temperature-resistant heavy-duty anticorrosive coating for stainless steel has the positive effects that:
(1) the epoxy silicone resin modified by epoxy groups and having good adhesive force to base materials is used as a main component A, the modified alicyclic amine curing agent is used as a main component B, and the two components can perform self-crosslinking reaction at normal temperature without high-temperature heating and curing.
(2) The stainless steel material after low surface treatment or sand blasting treatment has good adhesive force, is simple and convenient to construct, and is not influenced by seasonal changes: the coating can be sprayed in one step or multiple steps, the coating interval time is long, and the foaming and cracking phenomena can not occur at high temperature even in the state that the thickness of a dry film is 250 mu m.
(3) The surface of the stainless steel pipeline and equipment can be effectively protected in the environment at the high temperature of 300 ℃, and the stainless steel pipeline and equipment has excellent acid resistance, alkali resistance, salt resistance, oil resistance, water resistance and salt mist resistance and high cost performance.
Detailed Description
The following provides 3 examples of specific embodiments of a high temperature resistant heavy duty coating for stainless steel according to the present invention. However, it should be noted that the present invention is not limited to the following embodiments.
Example 1
The high-temperature-resistant heavy-duty anticorrosive paint for stainless steel comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight:
25.0% of modified epoxy organic silicon resin, namely modified epoxy organic silicon resin with the epoxy value of 0.03-0.08 and the mass solid content of 50 +/-1%; FJNH-3, a product of Kunnuo silicone Co., Ltd, Changzhou, can be used.
0.5 percent of modified polyurethane polymer dispersant, and can adopt EFKA-4010 product of Effka assistant company in Netherlands.
0.5 percent of high molecular polymer defoaming agent without organic silicon can adopt BYK-A501 product of Germany Bike auxiliary agent company.
0.7 percent of polyether modified organic silicon substrate wetting agent can adopt BYK-306 product of Germany Bike auxiliary agent company.
0.3% of castor oil-modified organic rheological additive can be ThiXATROL ST product of Hamming, D.modest adjuvant company.
0.1% of graphene; SE1132 product from Hexagon sixth element materials science and technology, Inc. may be used.
20.0 percent of environment-friendly chromium oxide green; raw materials are available from specialty markets.
38.9 percent of barite powder; raw materials are available from specialty markets.
14.0 percent of talcum powder; raw materials are available from specialty markets.
The component B comprises the following raw materials in percentage by weight:
99.0 percent of modified alicyclic amine, adopting the modified alicyclic amine with the active hydrogen equivalent of 113 and the mass solid content of 100 percent; the product EPIKURE3388 from the American Michii high and New materials group may be used.
1.0 percent of the mercapto polysiloxane adhesion promoter can adopt T-CURE products of advanced materials group of Mediterranean drawing.
(II) the preparation of the high-temperature resistant heavy-duty anticorrosive paint for stainless steel mainly comprises the following steps:
1. preparation of component A
Under the condition of ensuring that all equipment and appliances are clean, sequentially adding a dispersing agent, a defoaming agent, a base material wetting agent and a rheological additive into the modified epoxy organic silicon resin according to the weight percentage, and then stirring the mixture uniformly;
then sequentially adding graphene, environment-friendly chromium oxide green, barite powder and talcum powder according to the weight percentage, dispersing at a high speed until the temperature of the mixture reaches 45-50 ℃, and preserving heat for 40 minutes in the temperature range; and then naturally cooling, grinding by using a sand mill after cooling, grinding to the fineness of 60 mu m, filtering by using a 60-mesh filter screen, and packaging after the inspection is qualified.
2. Preparation of component B
Under the condition of ensuring that equipment and appliances are clean, adding a mercapto-polysiloxane adhesion promoter into the modified alicyclic amine according to mass percent, then stirring uniformly, filtering by using a 60-mesh filter screen, and packaging after the detection is qualified.
(III) use of the high-temperature-resistant heavy-duty anticorrosive paint for stainless steel
1. The surfaces of stainless steel pipes and equipment are low surface treated or treated with sand blasting.
2. Before coating, the component A and the component B are prepared according to the mass ratio of A to B =100 to 2.2 and are mixed for use.
3. In the construction, one-time spraying or multiple-time spraying can be carried out, the coating interval time is long, and the foaming and cracking phenomena can not occur at high temperature even in the state that the dry film thickness is 250 mu m.
Example 2
The high-temperature-resistant heavy-duty anticorrosive paint for stainless steel comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight:
33.0% of modified epoxy silicone resin (same as example 1).
0.4% of modified polyurethane polymer dispersant (same as example 1).
0.6% of silicone-free high-molecular polymer defoaming agent (same as example 1).
0.5% of polyether modified organosilicon substrate wetting agent (same as example 1).
0.5% of castor oil modified organic rheological aid (same as example 1).
0.14% of graphene (same as example 1).
25.0% of environment-friendly chromium oxide green (same as example 1).
30.0% of barite powder (same as example 1).
Talc 9.86%, (same as example 1).
The component B comprises the following raw materials in percentage by mass:
99.2% of modified alicyclic amine (same as example 1).
0.8% of a mercapto-polysiloxane adhesion promoter (same as example 1).
And secondly, preparing the high-temperature-resistant heavy-duty coating for stainless steel (same as the example 1).
(III) use of the high-temperature-resistant heavy-duty anticorrosive paint for stainless steel
1. The surfaces of stainless steel pipes and equipment are low surface treated or treated with sand blasting.
2. Before coating, the component A and the component B are prepared according to the mass ratio of A to B =100 to 2.91 and are mixed for use.
3. In the construction, one-time spraying or multiple-time spraying can be carried out.
Example 3
The high-temperature-resistant heavy-duty anticorrosive paint for stainless steel comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight:
40.0% of modified epoxy silicone resin (same as example 1).
0.5% of modified polyurethane polymer dispersant (same as example 1).
0.3% of silicone-free high-molecular polymer defoaming agent (same as example 1).
Polyether modified silicone base wetting agent 0.7% (same as example 1).
0.5% of castor oil modified organic rheological aid (same as example 1).
0.12% of graphene (same as example 1).
Green chromium oxide (green) 15.5% (same as example 1).
Barite powder 25.0% (same as example 1).
Talc 17.38% (same as example 1).
The component B comprises the following raw materials in percentage by mass:
99.5% of modified alicyclic amine (same as example 1).
0.5% of a mercapto-polysiloxane adhesion promoter (same as example 1).
And secondly, preparing the high-temperature-resistant heavy-duty coating for stainless steel (same as the example 1).
(III) use of the high-temperature-resistant heavy-duty anticorrosive paint for stainless steel
1. The surfaces of stainless steel pipes and equipment are low surface treated or treated with sand blasting.
2. Before coating, the component A and the component B are prepared according to the mass ratio of A to B =100 to 3.52 and are mixed for use.
3. In the construction, one-time spraying or multiple-time spraying can be carried out.
The detection results of the high-temperature-resistant heavy-duty anticorrosive coating for stainless steel prepared in examples 1 to 3 are as follows:
the high-temperature-resistant heavy-duty anticorrosive coating for stainless steel prepared in embodiments 1-3 of the invention has a glass transition temperature (Tg) as measured by a Differential Scanning Calorimeter (DSC): 100-112 ℃; the comprehensive chemical resistance performance is as follows: the water-resistant paint can resist 10% sulfuric acid solution for 30 days, 10% sodium hydroxide solution for 30 days, 3% sodium chloride solution for 30 days, 2# diesel oil for 30 days, neutral salt spray resistance for 3000 hours and water resistance for 3000 hours.
TABLE 1 glass transition temperature (Tg) of the high temperature resistant heavy duty coating for stainless steel prepared in examples 1 to 3
TABLE 2 comprehensive resistance to chemical properties of the high temperature resistant heavy duty anticorrosive coatings for stainless steel prepared in examples 1-3
Examples 1 to 3 of the present invention demonstrate that:
the high-temperature-resistant heavy-duty anticorrosive coating for stainless steel has higher glass transition temperature (Tg) and excellent comprehensive chemical resistance, can be used as a heavy-duty anticorrosive coating for pipelines and equipment which are made of stainless steel in the petrochemical industry and are at a high temperature of below 300 ℃, and has excellent acid resistance, alkali resistance, salt resistance, oil resistance, water resistance and salt mist resistance.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the weight percentage of the components of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The high-temperature-resistant heavy-duty anticorrosive paint for stainless steel comprises a component A and a component B, and is characterized in that the component A comprises the following raw materials in percentage by mass:
25.0-40.0% of modified epoxy organic silicon resin;
2.0% of an auxiliary agent I;
58.0-73.0% of inorganic pigment and filler;
the component B comprises the following raw materials in percentage by mass:
99.0-99.5% of modified alicyclic amine;
0.5-1.0% of an auxiliary agent II;
before coating, mixing the component A and the component B according to the mass ratio of A: B =100: 2.2-3.52 for use;
wherein the auxiliary agent II is a mercapto-polysiloxane adhesion promoter; the active hydrogen equivalent of the modified alicyclic amine is 113, and the mass solid content is 100%; the inorganic pigment filler comprises graphene, environment-friendly chromium oxide green, barite powder and talcum powder;
the modified epoxy organic silicon resin adopts FJNH-3 products produced by Jianuo organic silicon company Limited in Changzhou city; the glass transition temperature (Tg) of the coating is 100-112 ℃; the coating is self-crosslinking at normal temperature.
2. The high-temperature-resistant heavy-duty anticorrosive coating for stainless steel according to claim 1, wherein the additive I comprises a dispersant, a defoamer, a substrate wetting agent and a rheological additive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362743.3A CN108178984B (en) | 2017-12-18 | 2017-12-18 | High-temperature-resistant heavy-duty anticorrosive paint for stainless steel |
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|---|---|---|---|
| CN201711362743.3A CN108178984B (en) | 2017-12-18 | 2017-12-18 | High-temperature-resistant heavy-duty anticorrosive paint for stainless steel |
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| CN108178984A CN108178984A (en) | 2018-06-19 |
| CN108178984B true CN108178984B (en) | 2021-02-09 |
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| CN109517485B (en) * | 2018-11-12 | 2021-01-05 | 上海海隆赛能新材料有限公司 | Temperature-resistant high-pressure-resistant conductive anticorrosive paint |
| CN111303741A (en) * | 2020-03-04 | 2020-06-19 | 绵阳麦思威尔科技有限公司 | High-film-thickness waterborne polyurethane long-acting anticorrosive paint for wind power and petrochemical equipment and preparation method thereof |
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