Processing method of rust-free antirust paint and related processing system
Through precise design and process optimization of the two-component system, the rust-free anti-rust paint achieves rust removal, corrosion prevention, and primer functions in one step on rusty steel surfaces, solving the problems of cumbersome and ineffective traditional anti-rust and corrosion processes, and improving rust prevention effect and environmental friendliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional steel rust and corrosion prevention processes are cumbersome, inefficient, difficult to completely remove rust, have poor rust prevention effects, high environmental costs, and cannot meet long-term corrosion prevention needs.
The two-component rust-proof and anti-rust paint uses precise design and process optimization, including raw material purification, precise temperature control, graded filtration and sealed packaging in separate containers, to ensure that each component is fully mixed and reacted, achieving rust removal, corrosion prevention and primer functions in one step.
Rust-proof paint has strong penetration and high adhesion, and can be directly applied to rusted steel surfaces, saving labor costs, forming a stable protective film, and is compatible with a variety of topcoats. It is environmentally friendly, harmless, and has a long shelf life.
Smart Images
Figure CN121801468A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rust-proof paint production and processing, in particular to a processing method of rust-free rust-proof paint and a related processing system. BACKGROUND
[0002] In the fields of industrial equipment manufacturing, building steel structure, and mechanical part maintenance, rust and corrosion prevention of steel materials is a key link to guarantee the service life of equipment and reduce maintenance costs. Traditional steel rust and corrosion prevention processes need to remove surface rust through manual grinding, mechanical rust removal, pickling, and other methods, and then apply rust-proof primer and topcoat, which is complicated and has many technical defects. For example, manual and mechanical rust removal is labor-intensive and inefficient, and it is difficult to remove rust from complex structures such as corners, bolt heads, and welds; pickling rust removal can cause corrosion of the steel surface, generate waste liquid that pollutes the environment, and has high processing costs; at the same time, rust removal and rust prevention are carried out in separate steps in the traditional process, and if painting is not done in time after high-pressure sand blasting and other rust removal methods, the steel surface can quickly re-rust, resulting in a significant reduction in corrosion resistance; in addition, the traditional rust-proof primer has weak rust conversion ability and insufficient adhesion to the topcoat, which can cause paint film peeling and cracking in complex environments such as temperature changes and humidity, affecting corrosion resistance and durability.
[0003] With the increasing demand for environmental protection and the need for production efficiency improvement, there is an urgent need for an integrated solution that does not require complex rust removal pretreatment, can be directly applied to rusted steel surfaces, and has rust removal, rust prevention, and primer functions. Some existing rust-free products have poor penetration, incomplete rust conversion, and insufficient paint film stability, which cannot meet long-term corrosion prevention needs and have poor compatibility with subsequent topcoats, limiting their application range.
[0004] Therefore, it is a key requirement to develop a rust-free rust-proof paint processing method that is simple, environmentally friendly, efficient, completely converts rust, has strong adhesion, and is compatible with various topcoats to solve the pain points of traditional rust prevention and corrosion prevention processes and promote the upgrading of the industry. SUMMARY
[0005] The embodiments of the present application provide a processing method of rust-free rust-proof paint and a related processing system, which are beneficial to realize a rust-free rust-proof paint processing method that is simple, environmentally friendly, efficient, completely converts rust, has strong adhesion, and is compatible with various topcoats.
[0006] A processing method of rust-free rust-proof paint, the rust-free rust-proof paint being a two-component system including a main agent component and a curing agent component, the processing method comprising: Raw material pretreatment, including: selecting core raw materials and auxiliary raw materials, the auxiliary raw materials including plasticizing catalysts and environmentally friendly solvents; the core raw materials including OH-coupled macromolecules, anti-oxidation rust-proof components, and film-forming components; purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%; The main agent component preparation specifically comprises: adding the purified coupling macromolecule with OH 60-80 parts by weight, the film forming component 10-20 parts by weight into a reaction kettle, stirring and mixing at 50-60°C and a stirring speed of 300-500 r / min for 30-60 minutes, then adding the plasticizing catalyst and drying agent 2-5 parts, and continuing to stir at 70-80°C for 40-80 minutes, and cooling the materials in the reaction kettle to room temperature and filtering to obtain a colorless transparent viscous main agent component; The curing agent component preparation comprises: adding the anti-oxidation and anti-rust component 40-60 parts by weight and the environmentally friendly solvent 30-50 parts by weight into a dispersion kettle at room temperature and a stirring speed of 200-300 r / min for 20-40 minutes, then adding the remaining auxiliary raw materials, and stirring at 40-50°C for 30-50 minutes, and cooling the materials in the dispersion kettle and filtering to obtain a yellow or brown transparent viscous curing agent component; The prepared main agent component and the curing agent component are respectively loaded into sealed plastic barrels, and the barrel covers are sealed.
[0007] In some possible optional embodiments, a 500-800 mesh filter screen is used for filtering in the main agent component preparation process, and the filtering pressure is 0.3-0.5 MPa.
[0008] In some possible optional embodiments, a 1000-1200 mesh filter screen is used for filtering in the curing agent component preparation process, and the filtering temperature is controlled at 25-30°C, and the particle size of the obtained curing agent component is ≤5 μm.
[0009] In some possible optional embodiments, nitrogen protection is used in the stirring process in the main agent component preparation process, and the nitrogen flow is 0.5-1 L / min, and the nitrogen protection is used to prevent oxidation of the materials.
[0010] In some possible optional embodiments, the anti-oxidation and anti-rust component is added in a step-by-step manner in the curing agent component preparation process, 50%-55% of the anti-oxidation and anti-rust component is first added and dispersed with the environmentally friendly solvent for 10-15 minutes, and the remaining anti-oxidation and anti-rust component is then added and dispersed.
[0011] In some possible optional embodiments, gradient cooling is used in the cooling process in the main agent component preparation process, natural cooling is first performed to 50°C, and then cooling is performed to room temperature through a cooling jacket, and the cooling rate is 5-10°C / min.
[0012] In some possible alternative embodiments, the purification treatment of the core raw materials includes: purification of coupling macromolecules with OH by vacuum distillation at a temperature of 120-150°C and a vacuum degree of 0.08-0.1 MPa; purification of antioxidant and rust-preventive components by recrystallization with methanol as the crystallization solvent and a crystallization temperature of 0-5°C.
[0013] In some possible alternative implementations, the inner wall of the sealed plastic bucket may be coated with a polytetrafluoroethylene coating, and nitrogen gas may be injected into the bucket during sealing.
[0014] In some possible alternative embodiments, the raw material pretreatment further includes: pre-crosslinking the film-forming component at a pre-crosslinking temperature of 80-90°C for 20-30 minutes, with the pre-crosslinking degree controlled at 30%-40%.
[0015] In some possible alternative embodiments, the weight ratio of the main component to the curing agent is 3:1-5:1, and the viscosity of the prepared rust-free and rust-preventive paint is 9-15S.
[0016] In some possible alternative implementations, during the preparation of the main component, after the plasticizer and drying agent are added, ultrasonic dispersion is used to assist stirring. The ultrasonic power is 100-150W and the ultrasonic treatment time is 10-20 minutes to improve the uniformity of component mixing.
[0017] In some possible alternative implementations, during the preparation of the cured component, the scraping speed of the wall scraping device inside the dispersion vessel is set to 50-80 r / min. A scientifically controlled scraping speed helps prevent the antioxidant and rust-preventing components from adhering to the vessel wall, thus avoiding uneven dispersion.
[0018] In some possible alternative implementations, during the preparation of the main component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, which is used to improve the full mixing effect of the raw materials in the vessel.
[0019] In some possible alternative implementations, during the preparation of the solidified component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, in order to improve the thorough mixing effect of the raw materials in the vessel.
[0020] In some possible alternative implementations, the environmentally friendly solvent has a purity of ≥99.5% and a moisture content of, for example, ≤0.1%.
[0021] In some possible alternative embodiments, the inner wall of the reactor is made of stainless steel and is polished to a surface roughness Ra≤0.8μm.
[0022] In some possible alternative implementations, during the preparation of the cured component, the heating process is carried out by electric heating at a rate of 2-3°C / min to avoid local overheating that could lead to the decomposition of the raw materials.
[0023] In some possible implementations, the storage environment temperature of the sealed plastic drum is controlled at 5-35℃, the relative humidity is ≤60%, and the product shelf life is ≥1 year.
[0024] In some possible implementations, the main component and the hardener component need to be cured for 10-15 minutes before application, at a curing temperature of 20-25°C. Curing ensures that the two components react fully, which is beneficial for improving rust conversion and paint film adhesion.
[0025] In some possible implementations, the plasticizer drier has a purity of ≥99%, wherein the cobalt naphthenate content is 8%-10%, which is beneficial to improving the drying rate and stability of the paint film.
[0026] In some possible implementations, during the preparation of the curing agent component, the stability of the filtered curing agent component is tested. If no stratification or precipitation occurs after being placed at 50°C for 72 hours, it indicates that the curing agent component is prepared successfully.
[0027] This application embodiment also provides a rust-free anti-rust paint processing system, wherein the rust-free anti-rust paint is a two-component system, including a main component and a curing agent component, and the processing system includes: The raw material pretreatment device includes: selecting core raw materials and auxiliary raw materials, wherein the auxiliary raw materials include plasticizers and drying agents and environmentally friendly solvents; the core raw materials include OH-containing coupling macromolecules, antioxidant and rust-preventive components, and film-forming components; and purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%. The main component preparation device is specifically used to add 60-80 parts of purified OH-containing coupling macromolecules and 10-20 parts of film-forming components to a reaction vessel according to the weight ratio. The mixture is stirred and mixed for 30-60 minutes at 50-60℃ and a stirring speed of 300-500 r / min. Then, 2-5 parts of plasticizer and drying agent are added, the temperature is raised to 70-80℃ and stirring is continued for 40-80 minutes. After the material in the reaction vessel is cooled to room temperature, it is filtered to obtain a colorless, transparent and viscous main component. The curing agent component is prepared by adding 40-60 parts of antioxidant and rust-preventive component and 30-50 parts of environmentally friendly solvent to a dispersion vessel according to the weight ratio. The mixture is dispersed for 20-40 minutes at room temperature and a stirring speed of 200-300 r / min. The remaining auxiliary materials are then added, and the mixture is heated to 40-50℃ and stirred for 30-50 minutes. After cooling the material in the dispersion vessel, it is filtered to obtain a yellow or brown transparent viscous curing agent component. The packaging and sealing device is used to separately pack the prepared main agent component and curing agent component into sealed plastic buckets and seal the lids of the plastic buckets.
[0028] In some possible alternative implementations, the preparation of the main component involves filtration using a 500-800 mesh filter at a pressure of 0.3-0.5 MPa.
[0029] In some possible alternative implementations, the curing agent component is filtered using a 1000-1200 mesh filter during preparation, the filtration temperature is controlled at 25-30℃, and the particle size of the obtained curing agent component is ≤5μm.
[0030] In some possible alternative implementations, the stirring process during the preparation of the main component is protected by nitrogen, with a nitrogen flow rate of 0.5-1 L / min. The nitrogen protection is used to prevent material oxidation.
[0031] In some possible alternative implementations, the antioxidant and rust-preventive components are added in steps during the preparation of the curing agent components. First, 50%-55% of the antioxidant and rust-preventive components are added and dispersed with an environmentally friendly solvent for 10-15 minutes, and then the remaining antioxidant and rust-preventive components are added and dispersed again.
[0032] In some possible alternative implementations, the cooling process during the preparation of the main component adopts gradient cooling, first naturally cooling to 50°C, and then cooling down to room temperature through a cooling jacket, wherein the cooling rate is 5-10°C / min.
[0033] In some possible alternative embodiments, the purification treatment of the core raw materials includes: purification of coupling macromolecules with OH by vacuum distillation at a temperature of 120-150°C and a vacuum degree of 0.08-0.1 MPa; purification of antioxidant and rust-preventive components by recrystallization with methanol as the crystallization solvent and a crystallization temperature of 0-5°C.
[0034] In some possible alternative implementations, the inner wall of the sealed plastic bucket may be coated with a polytetrafluoroethylene coating, and nitrogen gas may be injected into the bucket during sealing.
[0035] In some possible alternative embodiments, the raw material pretreatment further includes: pre-crosslinking the film-forming component at a pre-crosslinking temperature of 80-90°C for 20-30 minutes, with the pre-crosslinking degree controlled at 30%-40%.
[0036] In some possible alternative embodiments, the weight ratio of the main component to the curing agent is 3:1-5:1, and the viscosity of the prepared rust-free and rust-preventive paint is 9-15S.
[0037] In some possible alternative implementations, during the preparation of the main component, after the plasticizer and drying agent are added, ultrasonic dispersion is used to assist stirring. The ultrasonic power is 100-150W and the ultrasonic treatment time is 10-20 minutes to improve the uniformity of component mixing.
[0038] In some possible alternative implementations, during the preparation of the cured component, the scraping speed of the wall scraping device inside the dispersion vessel is set to 50-80 r / min. A scientifically controlled scraping speed helps prevent the antioxidant and rust-preventing components from adhering to the vessel wall, thus avoiding uneven dispersion.
[0039] In some possible alternative implementations, during the preparation of the main component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, which is used to improve the full mixing effect of the raw materials in the vessel.
[0040] In some possible alternative implementations, during the preparation of the solidified component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, in order to improve the thorough mixing effect of the raw materials in the vessel.
[0041] In some possible alternative implementations, the environmentally friendly solvent has a purity of ≥99.5% and a moisture content of, for example, ≤0.1%.
[0042] In some possible alternative embodiments, the inner wall of the reactor is made of stainless steel and is polished to a surface roughness Ra≤0.8μm.
[0043] In some possible alternative implementations, during the preparation of the cured component, the heating process is carried out by electric heating at a rate of 2-3°C / min to avoid local overheating that could lead to the decomposition of the raw materials.
[0044] In some possible implementations, the storage environment temperature of the sealed plastic drum is controlled at 5-35℃, the relative humidity is ≤60%, and the product shelf life is ≥1 year.
[0045] In some possible implementations, the main component and the hardener component need to be cured for 10-15 minutes before application, at a curing temperature of 20-25°C. Curing ensures that the two components react fully, which is beneficial for improving rust conversion and paint film adhesion.
[0046] In some possible implementations, the plasticizer drier has a purity of ≥99%, wherein the cobalt naphthenate content is 8%-10%, which is beneficial to improving the drying rate and stability of the paint film.
[0047] In some possible implementations, during the preparation of the curing agent component, the stability of the filtered curing agent component is tested. If no stratification or precipitation occurs after being placed at 50°C for 72 hours, it indicates that the curing agent component is prepared successfully.
[0048] As can be seen, the solution provided in this application improves product performance through precise design and process optimization of a two-component system. For example, the purification process (purity ≥98%) in the raw material pretreatment stage effectively removes impurities and moisture, preventing them from interfering with the reaction process and significantly improving the stability of the product system. The main agent and curing agent are prepared separately, and precise temperature control (main agent 50-80℃, curing agent 40-50℃) and speed adjustment optimization help ensure that each component is fully mixed and reacted. The main agent is colorless, transparent, and viscous, and the curing agent is yellow or brown transparent and viscous, which meets the requirements of a homogeneous two-component system. The separate sealed packaging design prevents the components from reacting prematurely and ensures the compatibility of mixing during construction.
[0049] Tests show that the rust-proof and anti-rust paint produced by this processing method has extremely strong penetration and can be directly applied to rusty steel surfaces, achieving rust removal, corrosion prevention, and primer application in one step. It eliminates the need for traditional grinding and rust removal processes, saving significant labor costs. The paint film adhesion reaches level 1-2, and the impact resistance is ≥50cm. It can transform rust into a stable protective film, effectively removing rust spots and rust recurrence. It is compatible with almost any topcoat, and application tools can be cleaned with water, making it environmentally friendly and harmless. Each kilogram can cover an area of no less than 10 square meters, making it suitable for adapting to the corrosion prevention needs of steel equipment in various scenarios.
[0050] Furthermore, by refining the process constraints and optimizing key parameters throughout the entire processing flow, the product performance, production stability, and storage reliability of the rust-free and rust-preventive paint have been further enhanced. For example, the selection of targeted purification processes (reduced pressure distillation, recrystallization) and high-purity environmentally friendly solvents (≥99.5%), combined with pre-crosslinking treatment of film-forming components, ensures the activity of raw materials and system compatibility from the source, thus laying a solid foundation for subsequent reactions. During the production process, the graded high-precision filtration (500-1200 mesh) of the main agent and curing agent, nitrogen-protected stirring, gradient cooling, ultrasonic-assisted dispersion, and scientific wall scraping and stirring paddle design not only thoroughly remove tiny impurities (curing agent particle size ≤5μm), which helps to avoid raw material oxidation and adhesion, but also facilitates uniform mixing of each component, significantly improving the smoothness and density of the coating film after formation. In terms of storage and application compatibility, the nitrogen-sealed container with polytetrafluoroethylene inner wall and strict temperature and humidity control during storage help to extend the product shelf life to more than 1 year. The precise two-component ratio (3:1-5:1) and pre-application curing treatment further optimize the rust conversion efficiency and coating film adhesion (stable to level 1-2). Attached Figure Description
[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0052] Figure 1 This is a schematic flowchart of a rust-preventive paint processing method provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a rust-free anti-rust paint processing system provided in an embodiment of this application. Detailed Implementation
[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0054] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.
[0055] See Figure 1 , Figure 1 This is a schematic flowchart of a processing method for a rust-free and rust-preventive paint according to an embodiment of this application. The rust-free and rust-preventive paint is a two-component system, including a main component and a curing agent component. The processing method includes: Raw material pretreatment includes: selecting core raw materials and auxiliary raw materials, wherein the auxiliary raw materials include plasticizers and drying agents and environmentally friendly solvents; the core raw materials include OH-containing coupling macromolecules, antioxidant and rust-preventive components, and film-forming components; and purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%. The preparation of the main component specifically includes: adding 60-80 parts of purified OH-containing coupling macromolecules and 10-20 parts of film-forming components to a reaction vessel according to the weight ratio, stirring and mixing for 30-60 minutes at 50-60℃ and stirring speed of 300-500r / min, then adding 2-5 parts of plasticizer and drying agent, raising the temperature to 70-80℃ and continuing to stir for 40-80 minutes, and then filtering the material in the reaction vessel after cooling to room temperature to obtain a colorless, transparent, and viscous main component; The preparation of the curing agent component includes: adding 40-60 parts by weight of the antioxidant and rust-preventive component and 30-50 parts by weight of the environmentally friendly solvent to a dispersion vessel, dispersing for 20-40 minutes at room temperature and a stirring speed of 200-300 r / min, then adding the remaining auxiliary materials, heating to 40-50℃ and stirring for 30-50 minutes, cooling the material in the dispersion vessel and filtering it to obtain a yellow or brown transparent viscous curing agent component; The prepared main component and curing agent component were separately packed into sealed plastic buckets, and the lids of the plastic buckets were sealed.
[0056] In some possible alternative implementations, the preparation of the main component involves filtration using a 500-800 mesh filter at a pressure of 0.3-0.5 MPa.
[0057] In some possible alternative implementations, the curing agent component is filtered using a 1000-1200 mesh filter during preparation, the filtration temperature is controlled at 25-30℃, and the particle size of the obtained curing agent component is ≤5μm.
[0058] In some possible alternative implementations, the stirring process during the preparation of the main component is protected by nitrogen, with a nitrogen flow rate of 0.5-1 L / min. The nitrogen protection is used to prevent material oxidation.
[0059] In some possible alternative implementations, the antioxidant and rust-preventive components are added in steps during the preparation of the curing agent components. First, 50%-55% of the antioxidant and rust-preventive components are added and dispersed with an environmentally friendly solvent for 10-15 minutes, and then the remaining antioxidant and rust-preventive components are added and dispersed again.
[0060] In some possible alternative implementations, the cooling process during the preparation of the main component adopts gradient cooling, first naturally cooling to 50°C, and then cooling down to room temperature through a cooling jacket, wherein the cooling rate is 5-10°C / min.
[0061] In some possible alternative embodiments, the purification treatment of the core raw materials includes: purification of coupling macromolecules with OH by vacuum distillation at a temperature of 120-150°C and a vacuum degree of 0.08-0.1 MPa; purification of antioxidant and rust-preventive components by recrystallization with methanol as the crystallization solvent and a crystallization temperature of 0-5°C.
[0062] In some possible alternative implementations, the inner wall of the sealed plastic bucket may be coated with a polytetrafluoroethylene coating, and nitrogen gas may be injected into the bucket during sealing.
[0063] In some possible alternative embodiments, the raw material pretreatment further includes: pre-crosslinking the film-forming component at a pre-crosslinking temperature of 80-90°C for 20-30 minutes, with the pre-crosslinking degree controlled at 30%-40%.
[0064] In some possible alternative embodiments, the weight ratio of the main component to the curing agent is 3:1-5:1, and the viscosity of the prepared rust-free and rust-preventive paint is 9-15S.
[0065] In some possible alternative implementations, during the preparation of the main component, after the plasticizer and drying agent are added, ultrasonic dispersion is used to assist stirring. The ultrasonic power is 100-150W and the ultrasonic treatment time is 10-20 minutes to improve the uniformity of component mixing.
[0066] In some possible alternative implementations, during the preparation of the cured component, the scraping speed of the wall scraping device inside the dispersion vessel is set to 50-80 r / min. A scientifically controlled scraping speed helps prevent the antioxidant and rust-preventing components from adhering to the vessel wall, thus avoiding uneven dispersion.
[0067] In some possible alternative implementations, during the preparation of the main component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, which is used to improve the full mixing effect of the raw materials in the vessel.
[0068] In some possible alternative implementations, during the preparation of the solidified component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, in order to improve the thorough mixing effect of the raw materials in the vessel.
[0069] In some possible alternative implementations, the environmentally friendly solvent has a purity of ≥99.5% and a moisture content of, for example, ≤0.1%.
[0070] In some possible alternative embodiments, the inner wall of the reactor is made of stainless steel and is polished to a surface roughness Ra≤0.8μm.
[0071] In some possible alternative implementations, during the preparation of the cured component, the heating process is carried out by electric heating at a rate of 2-3°C / min to avoid local overheating that could lead to the decomposition of the raw materials.
[0072] In some possible implementations, the storage environment temperature of the sealed plastic drum is controlled at 5-35℃, the relative humidity is ≤60%, and the product shelf life is ≥1 year.
[0073] In some possible implementations, the main component and the hardener component need to be cured for 10-15 minutes before application, at a curing temperature of 20-25°C. Curing ensures that the two components react fully, which is beneficial for improving rust conversion and paint film adhesion.
[0074] In some possible implementations, the plasticizer drier has a purity of ≥99%, wherein the cobalt naphthenate content is 8%-10%, which is beneficial to improving the drying rate and stability of the paint film.
[0075] In some possible implementations, during the preparation of the curing agent component, the stability of the filtered curing agent component is tested. If no stratification or precipitation occurs after being placed at 50°C for 72 hours, it indicates that the curing agent component is prepared successfully.
[0076] See Figure 2 , Figure 2 This is a schematic diagram of a processing system for a rust-free and rust-preventive paint according to an embodiment of this application. The rust-free and rust-preventive paint is a two-component system, including a main component and a curing agent component. The processing system includes: The raw material pretreatment device 210 includes: selecting core raw materials and auxiliary raw materials, wherein the auxiliary raw materials include plasticizers and drying agents and environmentally friendly solvents; the core raw materials include OH-containing coupling macromolecules, antioxidant and rust-preventive components and film-forming components; and purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%. The main component preparation device 220 is specifically used to add 60-80 parts of purified OH-containing coupling macromolecules and 10-20 parts of film-forming components to a reaction vessel according to the weight ratio. The mixture is stirred and mixed for 30-60 minutes at 50-60℃ and a stirring speed of 300-500 r / min. Then, 2-5 parts of plasticizer and drying agent are added, the temperature is raised to 70-80℃ and stirring is continued for 40-80 minutes. After the material in the reaction vessel is cooled to room temperature, it is filtered to obtain a colorless, transparent, and viscous main component. Curing agent component preparation 230, specifically used for mixing by weight ratio, adding 40-60 parts of antioxidant and rust-preventive component and 30-50 parts of environmentally friendly solvent to a dispersion vessel, dispersing for 20-40 minutes at room temperature and stirring speed of 200-300 r / min, then adding the remaining auxiliary materials, heating to 40-50℃ and stirring for 30-50 minutes, cooling the material in the dispersion vessel and filtering it to obtain a yellow or brown transparent viscous curing agent component; The packaging and sealing device 240 is used to pack the prepared main agent component and curing agent component into sealed plastic buckets respectively, and to seal the lids of the plastic buckets.
[0077] In some possible alternative implementations, the preparation of the main component involves filtration using a 500-800 mesh filter at a pressure of 0.3-0.5 MPa.
[0078] In some possible alternative implementations, the curing agent component is filtered using a 1000-1200 mesh filter during preparation, the filtration temperature is controlled at 25-30℃, and the particle size of the obtained curing agent component is ≤5μm.
[0079] In some possible alternative implementations, the stirring process during the preparation of the main component is protected by nitrogen, with a nitrogen flow rate of 0.5-1 L / min. The nitrogen protection is used to prevent material oxidation.
[0080] In some possible alternative implementations, the antioxidant and rust-preventive components are added in steps during the preparation of the curing agent components. First, 50%-55% of the antioxidant and rust-preventive components are added and dispersed with an environmentally friendly solvent for 10-15 minutes, and then the remaining antioxidant and rust-preventive components are added and dispersed again.
[0081] In some possible alternative implementations, the cooling process during the preparation of the main component adopts gradient cooling, first naturally cooling to 50°C, and then cooling down to room temperature through a cooling jacket, wherein the cooling rate is 5-10°C / min.
[0082] In some possible alternative embodiments, the purification treatment of the core raw materials includes: purification of coupling macromolecules with OH by vacuum distillation at a temperature of 120-150°C and a vacuum degree of 0.08-0.1 MPa; purification of antioxidant and rust-preventive components by recrystallization with methanol as the crystallization solvent and a crystallization temperature of 0-5°C.
[0083] In some possible alternative implementations, the inner wall of the sealed plastic bucket may be coated with a polytetrafluoroethylene coating, and nitrogen gas may be injected into the bucket during sealing.
[0084] In some possible alternative embodiments, the raw material pretreatment further includes: pre-crosslinking the film-forming component at a pre-crosslinking temperature of 80-90°C for 20-30 minutes, with the pre-crosslinking degree controlled at 30%-40%.
[0085] In some possible alternative embodiments, the weight ratio of the main component to the curing agent is 3:1-5:1, and the viscosity of the prepared rust-free and rust-preventive paint is 9-15S.
[0086] In some possible alternative implementations, during the preparation of the main component, after the plasticizer and drying agent are added, ultrasonic dispersion is used to assist stirring. The ultrasonic power is 100-150W and the ultrasonic treatment time is 10-20 minutes to improve the uniformity of component mixing.
[0087] In some possible alternative implementations, during the preparation of the cured component, the scraping speed of the wall scraping device inside the dispersion vessel is set to 50-80 r / min. A scientifically controlled scraping speed helps prevent the antioxidant and rust-preventing components from adhering to the vessel wall, thus avoiding uneven dispersion.
[0088] In some possible alternative implementations, during the preparation of the main component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, which is used to improve the full mixing effect of the raw materials in the vessel.
[0089] In some possible alternative implementations, during the preparation of the solidified component, the stirring paddle used for stirring is an anchor-type stirring paddle with a gap of 5-10 mm between the stirring paddle and the vessel wall, in order to improve the thorough mixing effect of the raw materials in the vessel.
[0090] In some possible alternative implementations, the environmentally friendly solvent has a purity of ≥99.5% and a moisture content of, for example, ≤0.1%.
[0091] In some possible alternative embodiments, the inner wall of the reactor is made of stainless steel and is polished to a surface roughness Ra≤0.8μm.
[0092] In some possible alternative implementations, during the preparation of the cured component, the heating process is carried out by electric heating at a rate of 2-3°C / min to avoid local overheating that could lead to the decomposition of the raw materials.
[0093] In some possible implementations, the storage environment temperature of the sealed plastic drum is controlled at 5-35℃, the relative humidity is ≤60%, and the product shelf life is ≥1 year.
[0094] In some possible implementations, the main component and the hardener component need to be cured for 10-15 minutes before application, at a curing temperature of 20-25°C. Curing ensures that the two components react fully, which is beneficial for improving rust conversion and paint film adhesion.
[0095] In some possible implementations, the plasticizer drier has a purity of ≥99%, wherein the cobalt naphthenate content is 8%-10%, which is beneficial to improving the drying rate and stability of the paint film.
[0096] In some possible implementations, during the preparation of the curing agent component, the stability of the filtered curing agent component is tested. If no stratification or precipitation occurs after being placed at 50°C for 72 hours, it indicates that the curing agent component is prepared successfully.
[0097] As can be seen, the solution provided in this application improves product performance through precise design and process optimization of a two-component system. For example, the purification process (purity ≥98%) in the raw material pretreatment stage effectively removes impurities and moisture, preventing them from interfering with the reaction process and significantly improving the stability of the product system. The main agent and curing agent are prepared separately, and precise temperature control (main agent 50-80℃, curing agent 40-50℃) and speed adjustment optimization help ensure that each component is fully mixed and reacted. The main agent is colorless, transparent, and viscous, and the curing agent is yellow or brown transparent and viscous, which meets the requirements of a homogeneous two-component system. The separate sealed packaging design prevents the components from reacting prematurely and ensures the compatibility of mixing during construction.
[0098] Tests show that the rust-proof and anti-rust paint produced by this processing method has extremely strong penetration and can be directly applied to rusty steel surfaces, achieving rust removal, corrosion prevention, and primer application in one step. It eliminates the need for traditional grinding and rust removal processes, saving significant labor costs. The paint film adhesion reaches level 1-2, and the impact resistance is ≥50cm. It can transform rust into a stable protective film, effectively removing rust spots and rust recurrence. It is compatible with almost any topcoat, and application tools can be cleaned with water, making it environmentally friendly and harmless. Each kilogram can cover an area of no less than 10 square meters, making it suitable for adapting to the corrosion prevention needs of steel equipment in various scenarios.
[0099] Furthermore, by refining the process constraints and optimizing key parameters throughout the entire processing flow, the product performance, production stability, and storage reliability of the rust-free and rust-preventive paint have been further enhanced. For example, the selection of targeted purification processes (reduced pressure distillation, recrystallization) and high-purity environmentally friendly solvents (≥99.5%), combined with pre-crosslinking treatment of film-forming components, ensures the activity of raw materials and system compatibility from the source, thus laying a solid foundation for subsequent reactions. During the production process, the graded high-precision filtration (500-1200 mesh) of the main agent and curing agent, nitrogen-protected stirring, gradient cooling, ultrasonic-assisted dispersion, and scientific wall scraping and stirring paddle design not only thoroughly remove tiny impurities (curing agent particle size ≤5μm), which helps to avoid raw material oxidation and adhesion, but also facilitates uniform mixing of each component, significantly improving the smoothness and density of the coating film after formation. In terms of storage and application compatibility, the nitrogen-sealed container with polytetrafluoroethylene inner wall and strict temperature and humidity control during storage help to extend the product shelf life to more than 1 year. The precise two-component ratio (3:1-5:1) and pre-application curing treatment further optimize the rust conversion efficiency and coating film adhesion (stable to level 1-2).
[0100] Below is an example of an optional rust-preventive paint application process.
[0101] Pre-construction preparation stage: Substrate pretreatment: Use a wire brush or compressed air to remove loose, easily peeling rust, oil, and dust from the surface of steel components. No mechanical grinding or acid pickling is required. If the surface is heavily oiled, wipe it with anhydrous ethanol first and wait for it to evaporate completely before proceeding with construction.
[0102] Environmental confirmation: Ensure the ambient temperature is 5-35℃ and the relative humidity is ≤60% during construction. Avoid construction in rainy, windy, or condensing weather. Take rain protection measures within 12 hours after application.
[0103] Two-component preparation: Take out the corresponding amounts of the two components according to the weight ratio of the main component to the curing agent component of 3:1-5:1 (refer to the processing scheme ratio), pour them into a clean container, and stir evenly with a stirring rod for 3-5 minutes to ensure uniform mixing.
[0104] Curing treatment: Let the prepared paint stand for 10-15 minutes (20-25℃) to allow the two components to react fully, thereby improving the rust conversion effect and paint film adhesion.
[0105] Coating application stage: Application method selection: brushing, dipping, rolling or low-pressure spraying can be used; corners, screws, bolt heads, welds and other hidden areas are recommended to be painted with a brush.
[0106] Coating thickness control: When the rust layer thickness is ≤0.3mm, one thin coat is sufficient; when the rust layer thickness is >0.3mm, apply a second coat after the first coat is surface dry (about 3 hours, 25℃, 60% relative humidity) to ensure that the coating penetrates to the bottom of the rust layer.
[0107] Dosage standard: Each kilogram of primer should cover an area of not less than 10 square meters, following the principle of "thick rust, heavy coating; thin rust, light coating; no rust, just a quick coat" to avoid missed areas or local accumulation.
[0108] The stage from the initial coating to the application of the topcoat: Drying and curing: Allow to dry naturally until fully dry (24-78 hours under suitable environmental conditions of 25℃ and 60% relative humidity). The higher the temperature, the shorter the drying time. If a "whitening" phenomenon occurs after construction (such as due to rain or condensation), no treatment is required; simply apply the topcoat directly.
[0109] Topcoat compatibility: After the anti-rust primer has completely dried, any type of topcoat (such as alkyd paint, polyurethane paint, etc.) can be applied. Follow the product instructions for the topcoat application process.
[0110] Tool cleaning: After application, immediately rinse brushes, containers and other tools with water to prevent paint from drying and adhering.
[0111] Disposal of leftover paint: Unused mixed paint must be used within 4 hours. Unopened main agent and hardener must be sealed and stored in a cool, dry place (5-35℃, relative humidity ≤60%), with a shelf life of ≥1 year.
[0112] When the substrate surface is free of rust or has old paint residue, the primer drying time needs to be extended by 1-2 times to ensure full adhesion between the paint film and the substrate. If the paint viscosity is too high during application (exceeding 9-15 seconds), a small amount of deionized water can be added for dilution, with the dilution ratio not exceeding 5% of the total paint volume. After drying, the paint film will be a semi-transparent crystalline state. If adhesion testing is required, it can be performed according to the GB / T 9286-1998 standard. Subsequent processes can only proceed after the standard is met.
[0113] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A processing method for a rust-preventive paint that requires no rust removal, characterized in that, The rust-proof and anti-rust paint is a two-component system, including a main component and a curing agent component. The processing method includes: Raw material pretreatment includes: selecting core raw materials and auxiliary raw materials, wherein the auxiliary raw materials include plasticizers and drying agents and environmentally friendly solvents; the core raw materials include OH-containing coupling macromolecules, antioxidant and rust-preventive components, and film-forming components; and purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%. The preparation of the main component specifically includes: adding 60-80 parts of purified OH-containing coupling macromolecules and 10-20 parts of film-forming components to a reaction vessel according to the weight ratio, stirring and mixing for 30-60 minutes at 50-60℃ and stirring speed of 300-500r / min, then adding 2-5 parts of plasticizer and drying agent, raising the temperature to 70-80℃ and continuing to stir for 40-80 minutes, and then filtering the material in the reaction vessel after cooling to room temperature to obtain a colorless, transparent, and viscous main component; The preparation of the curing agent component includes: adding 40-60 parts by weight of the antioxidant and rust-preventive component and 30-50 parts by weight of the environmentally friendly solvent to a dispersion vessel, dispersing for 20-40 minutes at room temperature and a stirring speed of 200-300 r / min, then adding the remaining auxiliary materials, heating to 40-50℃ and stirring for 30-50 minutes, cooling the material in the dispersion vessel and filtering it to obtain a yellow or brown transparent viscous curing agent component; The prepared main component and curing agent component were separately packed into sealed plastic buckets, and the lids of the plastic buckets were sealed.
2. The processing method according to claim 1, characterized in that, The main component is prepared using a 500-800 mesh filter with a filtration pressure of 0.3-0.5 MPa.
3. The processing method according to claim 1, characterized in that, During the preparation of the curing agent components, a 1000-1200 mesh filter is used for filtration, the filtration temperature is controlled at 25-30℃, and the particle size of the obtained curing agent components is ≤5μm.
4. The processing method according to claim 1, characterized in that, The stirring process during the preparation of the main component is protected by nitrogen gas, with a nitrogen flow rate of 0.5-1 L / min. Nitrogen protection is used to prevent material oxidation.
5. The processing method according to claim 1, characterized in that, During the preparation of the curing agent components, the antioxidant and rust-preventive components are added in steps. First, 50%-55% of the antioxidant and rust-preventive components are added and dispersed with an environmentally friendly solvent for 10-15 minutes, and then the remaining antioxidant and rust-preventive components are added and dispersed again.
6. The processing method according to claim 1, characterized in that, The cooling process during the preparation of the main component adopts gradient cooling. It is first naturally cooled to 50°C, and then cooled to room temperature through a cooling jacket. The cooling rate is 5-10°C / min.
7. The processing method according to claim 1, characterized in that, The core raw materials are purified separately, including: for coupling macromolecules with OH groups, purification is carried out by vacuum distillation at a temperature of 120-150℃ and a vacuum degree of 0.08-0.1MPa; for antioxidant and rust-preventive components, purification is carried out by recrystallization with methanol as the crystallization solvent and a crystallization temperature of 0-5℃.
8. The processing method according to claim 1, characterized in that, The inner wall of the sealed plastic bucket is coated with polytetrafluoroethylene, and nitrogen gas is injected into the bucket during sealing.
9. The processing method according to claim 1, characterized in that, The raw material pretreatment also includes: pre-crosslinking the film-forming components at a temperature of 80-90°C for 20-30 minutes, with the degree of pre-crosslinking controlled at 30%-40%.
10. A rust-free anti-rust paint processing system, characterized in that, The rust-proof and anti-rust paint is a two-component system, including a main component and a curing agent component. The processing system includes: The raw material pretreatment device includes: selecting core raw materials and auxiliary raw materials, wherein the auxiliary raw materials include plasticizers and drying agents and environmentally friendly solvents; the core raw materials include OH-containing coupling macromolecules, antioxidant and rust-preventive components, and film-forming components; and purifying the core raw materials to remove impurities and moisture, so that the purity of the core raw materials is ≥98%. The main component preparation device is specifically used to add 60-80 parts of purified OH-containing coupling macromolecules and 10-20 parts of film-forming components to a reaction vessel according to the weight ratio. The mixture is stirred and mixed for 30-60 minutes at 50-60℃ and a stirring speed of 300-500 r / min. Then, 2-5 parts of plasticizer and drying agent are added, the temperature is raised to 70-80℃ and stirring is continued for 40-80 minutes. After the material in the reaction vessel is cooled to room temperature, it is filtered to obtain a colorless, transparent and viscous main component. The curing agent component is prepared by adding 40-60 parts of antioxidant and rust-preventive component and 30-50 parts of environmentally friendly solvent to a dispersion vessel according to the weight ratio. The mixture is dispersed for 20-40 minutes at room temperature and a stirring speed of 200-300 r / min. The remaining auxiliary materials are then added, and the mixture is heated to 40-50℃ and stirred for 30-50 minutes. After cooling the material in the dispersion vessel, it is filtered to obtain a yellow or brown transparent viscous curing agent component. The packaging and sealing device is used to separately pack the prepared main agent component and curing agent component into sealed plastic buckets and seal the lids of the plastic buckets.