A ship cabin coating paint and a coating process

Abstract

The application provides a ship cabin coating paint and a coating process. The raw materials for preparing the coating paint comprise the following components by weight: 30-35 parts of bisphenol F type epoxy resin, 25-30 parts of cured modified epoxy polyamide, 3-5 parts of curing agent, and 15-20 parts of pigment. The technical scheme of the application modifies the epoxy polyamide component, so that the epoxy polyamide component can adapt to the seawater environment. The combination of the cured modified epoxy polyamide and the bisphenol F type epoxy resin greatly improves the weather resistance of the ship ballast water tank. When the ship sails across different latitudes, the ballast tank of the ship can adapt to the temperature change of seawater at different latitudes. The ship ballast tank is protected from seawater erosion and corrosion, and the probability of paint cracking is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ships, and particularly relates to a ship cabin coating paint and a coating process. BACKGROUND

[0002] The ship ballast water tank is a ship cabin for placing ballast water, and is used for adjusting the center of gravity position, floating state and stability of the ship. The ballast tank can solve the problems of insufficient stability or improper draft of the ship caused by oil and water consumption and the rising of the center of gravity during the sailing process. The so-called "ballast" refers to heavy objects used for increasing stability, and the ship cabin loaded with ballast water is the ballast water tank. In the passenger ferry, the ballast water tank can also play a role in adjusting the balance. Due to the complex sea environment, the near-sea navigation environment is different from the far-sea navigation environment, and other factors, the primer and the finish of the ship ballast tank are generally customized according to the specific route of the ship, the specific type of the ship and other parameters during the production and coating.

[0003] In the prior art, there is a technical scheme of using coating paint to reduce the coating difficulty and shorten the coating period. Although the coating process of the ship ballast tank is simplified, and the negative effects possibly caused by the coating paint are improved, the effect is still different from that of the conventional step-by-step coating of the primer and the finish, and cannot meet the needs of the ship involved in long-distance sea transportation. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a ship cabin coating paint and a coating process for improving the existing ship cabin coating quality problem to ensure the service life and maintenance cost of the ship.

[0005] In the first aspect, the present application provides a ship cabin coating paint, and the preparation raw materials include at least the following components according to weight parts:

[0006] 30-35 parts of bisphenol F type epoxy resin, 25-30 parts of curing modified epoxy polyamide, 3-5 parts of curing agent, and 15-20 parts of pigment.

[0007] In an optional embodiment, the preparation step of the curing modified epoxy polyamide includes:

[0008] S1, after crushing the solid polyamide resin, add it into the solvent and heat and stir until completely dissolved, the solvent is xylene; the weight ratio of the solid polyamide resin to the solvent is between 1:1 and 1:3;

[0009] S2, add a modifier to the solution of step S1, the modifier is di-tert-butyl-p-cresol and allyl acid ester; wherein the weight ratio of di-tert-butyl-p-cresol, allyl acid ester and polyamide resin is (0.5-2):(0.5-2):(2-10).

[0010] In an optional embodiment, the curing agent is diaminoditolylalkane.

[0011] In a second aspect, the application provides a coating process for a ship cabin coating paint, comprising the following steps:

[0012] S1, collecting environmental change data corresponding to the ship route, and making a list of performance requirements for the coating paint, the coating paint being any of the above technical solutions;

[0013] S2, making an environmental simulation cabin based on the collected sea water change data in step S1;

[0014] S3, feeding the prepared raw materials into the reaction kettle in different component proportions step by step for reaction, and sampling at each step;

[0015] S4, coating the sampled samples to the surface of the cabin material, placing them in the environmental simulation cabin for testing, and collecting parameters;

[0016] S5, selecting a calculation model, importing the parameters in steps S1-S4, and calculating the best proportioning scheme.

[0017] In an optional embodiment, step S5 comprises:

[0018] S51, importing the to-be-adjusted data of the environmental simulation cabin and the performance data of the coating paint into the data warehouse, and checking whether the data import is complete based on the snowflake data model;

[0019] S52, importing the preset component proportioning data into the data warehouse and displaying it in the snowflake data model;

[0020] S53, after the cabin material is tested in the environmental simulation cabin, importing the subsequent test data one by one into the data warehouse and displaying it in the snowflake data model, and calculating the best proportioning scheme.

[0021] In an optional embodiment, it further comprises at least the following steps:

[0022] P1, pretreating the surface of the cabin steel plate to remove surface impurities, oil stains, and surface rust;

[0023] P2, steel plate defect structure treatment, detecting defects in the steel structure weld and joint structure, and performing secondary reinforcement repair on the defect structure;

[0024] P3, dust removal treatment of the steel plate to ensure the cleanliness of the steel plate surface;

[0025] P4, coating the surface of the cabin steel plate with the coating paint of any of the above technical solutions.

[0026] In an optional embodiment, the dust removal method in step P3 is as follows: select a magnetic suction soft plate and cover one side of the magnetic suction soft plate with an adhesive film; use a negative pressure dust collection device to clean the dust on the surface of the steel plate once; after the first cleaning is completed, use a magnetic suction adhesive plate to clean the surface of the steel plate a second time to ensure the cleanliness of the steel plate surface.

[0027] In an optional implementation, the coating method in step P4 includes at least four coating processes:

[0028] Apply the first coat to specific areas of the easily corroded structure;

[0029] After the first coat of paint has dried, apply a second coat of paint for touch-up.

[0030] The third coat of paint is applied to the entire surface of the cabin.

[0031] After the third coat of paint has dried, apply a second coat to complete the fourth coat.

[0032] In an optional implementation, the process also includes a paint film inspection process: during the paint film inspection, experimental data of the coating paint is retrieved and used as calibration data to verify the hull paint surface condition data; during the data verification of the paint film inspection, if the hull inspection data deviates from the experimental data, the corresponding deviation data is traced back, and then the coating operation is re-inspected and repaired.

[0033] Compared with the prior art, the technical solution provided in this application has the following beneficial effects:

[0034] The technical solution provided in this application modifies the epoxy polyamide component to make it adaptable to the seawater environment. Furthermore, the combined use of cured modified epoxy polyamide and bisphenol F type epoxy resin greatly improves the weather resistance of ship ballast tanks. When sailing across latitudes, the ship's ballast tanks can adapt to the temperature changes of seawater at different latitudes, protecting the ship's ballast tanks from seawater erosion and corrosion while reducing the probability of paint cracking.

[0035] The technical solution of this application statistically integrates environmental simulation data, coating performance data, and coating composition data, calculates the correlation between coating performance data and coating composition data, and uses calculation to derive the expected optimal mixing ratio. The specific mixing ratio can be adjusted according to the different performance requirements of the ship, saving experimental costs in the coating preparation process and greatly saving time and resource costs in the coating experiment.

[0036] The technical scheme of the application can improve the accuracy of the inspection of the coating result in the coating process of the paint surface by combining the experimental data in the coating paint preparation process to perform the coating result inspection, can improve the accuracy of the coating result of the paint surface, and can more accurately understand the specific reasons for the unqualified coating of the paint surface and perform targeted repair, thereby improving the efficiency of the coating of the paint surface. The ship using the coating paint can well meet the use requirements related to long-distance sea transportation. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A coating process flowchart of a ship cabin provided by the application is shown. DETAILED DESCRIPTION

[0038] The embodiments of the application are described below through specific examples. Those skilled in the art can easily understand other advantages and principles of the application from the content disclosed in the specification. The application can also be implemented or applied through different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the application.

[0039] Embodiment One:

[0040] The embodiment provides a coating paint for a ship cabin, and the preparation raw materials include, by weight, at least the following components: 35 parts of bisphenol F type epoxy resin, 28 parts of curing modified epoxy polyamide, 3 parts of curing agent which is diamino dimethyl benzene, and 15 parts of pigment which is iron oxide red.

[0041] The preparation steps of the curing modified epoxy polyamide include:

[0042] S1, after crushing the solid polyamide resin, the polyamide resin is added into the xylene solvent and heated and stirred until completely dissolved, wherein the weight ratio of the solid polyamide resin to the xylene solvent is 1:2;

[0043] S2, a modifier is added to the solution of step S1, the modifier is di-tert-butyl-p-cresol and allyl acid ester, and the weight ratio of di-tert-butyl-p-cresol, allyl acid ester and polyamide resin is 1:1:6.

[0044] According to the test verification, the neutral salt spray test is performed on the coating paint sample with a thickness of 150 μm according to GB / T 1771-2007, and the results are as follows:

[0045] The salt spray resistance time is ≥3000 hours, and there is no blistering and no rusting, which is 50% higher than the conventional epoxy coating with a salt spray resistance of ≤2000 hours.

[0046] Adhesion test: according to GB / T 9286-1998, the adhesion grade is 0, no falling off, better than 1-2 of conventional paint.

[0047] Impact resistance data: according to GB / T 1732-1993, the impact resistance is greater than or equal to 50 kg·cm, better than less than or equal to 30 kg·cm of conventional paint.

[0048] As can be seen, the modified product obtained by adopting the scheme of the embodiment has excellent water resistance, neutral salt spray resistance and impact resistance, and the adhesion is significantly improved compared with existing coating paint.

[0049] Example two:

[0050] The embodiment provides a ship cabin coating paint, and raw materials for preparation at least include the following components according to weight parts: bisphenol F type epoxy resin 30 parts, curing modified epoxy polyamide 25 parts, curing agent is diamino dimethylbenzene alkane 4 parts, pigment is iron oxide red 18 parts, coupling agent 1.5 parts.

[0051] The preparation steps of the curing modified epoxy polyamide include:

[0052] S1, after crushing the solid polyamide resin, add dimethylbenzene solvent and heat stirring until completely dissolved, wherein the weight ratio of the solid polyamide resin to the dimethylbenzene solvent is 1:3, and the heating temperature is 80℃;

[0053] S2, add a modifier to the solution of step S1, the modifier is di-tert-butyl-p-cresol and allyl acid ester, specifically, the weight ratio of di-tert-butyl-p-cresol, allyl acid ester and polyamide resin is 1:1:3, and silane coupling agent KH-550 is added, ultrasonic dispersion is adopted, the frequency is 40 kHz, the time is 30 minutes, the nanoparticles are uniformly dispersed, and the reaction is carried out at 100℃ for 3 hours under nitrogen protection;

[0054] After cooling, the modified product is obtained, the viscosity is reduced by 30% compared with conventional polyamide, and the nano-silica is uniformly dispersed, the mass loss is less than or equal to 20 mg / 1000 turns measured by abrasion test, and the nano-silica and the modifier jointly improve the wear resistance and permeability resistance of the coating.

[0055] Example three:

[0056] The embodiment provides a ship cabin coating paint, and raw materials for preparation at least include the following components according to weight parts: bisphenol F type epoxy resin 30 parts, curing modified epoxy polyamide 25 parts, curing agent is diamino dimethylbenzene alkane 4 parts, pigment is iron oxide red 18 parts, coupling agent 1.5 parts.

[0057] The preparation steps of the curing modified epoxy polyamide include:

[0058] S1, the solid polyamide resin is crushed and then added into xylene solvent for heating and stirring until completely dissolved, wherein the dissolution temperature is 70-75 DEG C, and the weight ratio of the polyamide resin to the xylene solvent is 1:1;

[0059] S2, the modifier is added into the solution of step S1, the modifier is di-tert-butyl-p-cresol and allyl acid ester, specifically, the weight ratio of di-tert-butyl-p-cresol, allyl acid ester and polyamide resin is 1:1.5:4, the reaction temperature of step S2 is 110-120 DEG C, the temperature is controlled in stages to avoid degradation of the polyamide, and 0.1-0.3 parts of catalyst tetrabutylammonium bromide is added to improve the reaction efficiency, and the surface drying time can be reduced by 25%.

[0060] Example four:

[0061] The embodiment provides a coating process for ship cabin coating paint, comprising the following steps:

[0062] S1, collecting environmental change data corresponding to the ship route, and making a list of performance requirements for the coating paint, the coating paint being the coating paint provided in examples one to three.

[0063] In the above process, the applicable environment of the coating paint is cross-latitude navigation, and the ship is in open sea navigation, so the environmental change data collection items include high-latitude near-sea water temperature, high-latitude near-sea water composition, low-latitude near-sea water temperature, low-latitude near-sea water composition, intermediate-latitude open-sea water temperature, intermediate-latitude open-sea water composition, and route seasonal change data, wherein the route seasonal change data includes minimum temperature and wind wave data and maximum temperature and wind wave data.

[0064] S2, based on the sea water change data collected in step S1, an environment simulation bin is made.

[0065] In the above process, the environment simulation bin has water pressure adjustment, water temperature adjustment and water flow speed adjustment functions, the sea water in the environment simulation bin is directly obtained from the ocean, the water pressure adjustment, water temperature adjustment and water flow speed adjustment are simulated step by step according to the ship navigation environment in step S1, and the sea water in the environment simulation bin is replaced according to the seasonal ocean current caused sea water change to meet the full-process simulation of the ship navigation environment. For example, the temperature range of the environment simulation bin is 20 DEG C (high latitude) to 45 DEG C (equatorial sea area); the salinity gradient is 0.5% to 4.5% (simulating fresh water estuary to Red Sea high salinity water area); the water flow speed is 0.5-5 m / s (simulating still water to strong ocean current).

[0066] S3, the preparation raw materials are added into the reaction kettle in different component proportions for reaction, and sampling is performed at each step.

[0067] In the above process, first, the ingredients of the existing ship's ballast water tank bottom paint are referred to for preliminary proportioning, and the ingredient content is adjusted according to the ingredients of the bottom paint to prepare at least three alternative proportioning schemes. For example, for the "cross-latitude navigation" requirement, the optimized proportioning is: bisphenol F epoxy resin 33 parts, curing modified epoxy polyamide 28 parts, curing agent 4.2 parts. The test verified that the performance of the coating paint is as follows: salt spray resistance time 3200 hours, adhesion 0 level, meeting the demand of full sea area from the North Pole to the Equator.

[0068] S4, the sampled sample is coated on the surface of the cabin material, placed in the environmental simulation chamber for testing, and the parameters are collected.

[0069] In the above process, the bottom paint prepared by the alternative proportioning scheme is coated on the ballast tank material, and after drying, it is placed in the environmental simulation chamber for testing. After the environmental simulation is completed, the ballast tank material is taken out, and the state of the bottom paint coated thereon is detected. The performance tests include paint cracking resistance, adhesion, impact resistance, water resistance, corrosion resistance, and the performance test results are listed and compared. The list also includes the ingredient content data.

[0070] S5, select the calculation model, import the parameters in steps S1-S4, and calculate the best proportioning scheme.

[0071] In the above process, the sample test data is imported into the big data statistical system, and the performance of each component is associated with the performance of the related bottom paint. At the same time, the correlation coefficient of the component performance data and the performance data is calculated by the data statistical model. The predicted best proportioning scheme is derived by calculation, and the final test and adjustment are carried out.

[0072] Specifically, in step S5, the big data statistical system selects a relational database mainly used for multi-source data integration and can associate each item of data. A data warehouse is established for each experiment. The parameter import method of step S5 is:

[0073] S51, import the performance data of the coating paint and the data to be adjusted in the environmental simulation chamber into the data warehouse, and check whether the data import is complete based on the snowflake data model;

[0074] S52, import the preset ingredient proportioning data into the data warehouse and display it in the snowflake data model;

[0075] S53, after the cabin material is tested in the environmental simulation chamber, the subsequent test data is imported into the data warehouse one by one, and displayed in the snowflake data model, and the best proportioning scheme is calculated.

[0076] S54, after the data import is completed, the data warehouse using the snowflake data model integrates and stores the data, and preliminarily establishes the relevance of the imported data, specifically including:

[0077] The snowflake data model of multiple sets of experimental data is input into the relational database as a single data package, and the data of the same item in different snowflake data models is associated through the relational database, and the data with a causal relationship in the same snowflake data model is also associated. Subsequently, the parameter variation law in different snowflake data models is calculated to obtain a performance variation peak value change graph of the bottom-in-one paint, and the matching data corresponding to the peak value data is selected for matching experiment to verify the calculation result.

[0078] Embodiment five:

[0079] The embodiment provides a coating process of a ship cabin coating paint, which is based on the preliminary process provided in embodiment four and at least includes the following steps:

[0080] P1, pretreating the surface of the steel plate of the cabin: cleaning the surface of the steel plate to remove surface impurities and oil stains, and then drying and rust removal and polishing to remove surface rust.

[0081] P2, steel plate defect structure treatment, detecting the defect condition of the steel structure weld and the joint surface structure, and repairing the defect structure.

[0082] P3, dust removal treatment of the steel plate to ensure the cleanliness of the steel plate surface. Specifically, a magnetic soft plate is selected and a sticky film is covered on one side of the magnetic soft plate; a negative pressure dust collection equipment is used to clean the dust on the surface of the steel plate once; and the surface of the steel plate is cleaned twice using the magnetic sticky plate to ensure the cleanliness of the steel plate surface. Specifically, the magnetic strength is greater than 500 Gauss to ensure adsorption on the surface of the steel plate.

[0083] P4, using the coating paint provided in embodiments one to three to coat the surface of the steel plate of the cabin. Specifically, the coating method of this step includes at least four coating processes:

[0084] First-time spraying on specific areas of the easily corroded structure; optionally, the first-time spraying thickness is between 60 μm and 80 μm.

[0085] After the first-time sprayed paint surface is dry, the second-time spraying is performed; optionally, the second-time spraying thickness is between 20 μm and 30 μm.

[0086] Third-time spraying on the whole cabin surface; optionally, the third-time spraying thickness is between 100 μm and 120 μm.

[0087] After the third spraying, the paint surface is dried and then recoated, and the fourth spraying is completed. Optionally, the fourth spraying has a thickness of 40-60 μm.

[0088] In the above multiple spraying process, each layer is cured at room temperature for no less than 2 hours.

[0089] P5, paint film repair.

[0090] P6, paint film inspection: when performing paint film inspection, the experimental data of the coating paint are called to serve as calibration data to verify the ship body paint surface state data; in the data verification of the paint film inspection, when the ship body inspection data deviates from the experimental data, the corresponding deviation data is traced, and then the coating operation is re-inspected and repaired.

[0091] In summary, the technical scheme of the present application statistically integrates environmental simulation data, coating paint performance data, and coating paint component data, calculates the correlation between the coating paint performance data and the coating paint component data, and uses calculation to derive the predicted optimal ratio scheme. The ratio can be adjusted according to the different performance requirements of the ship, saving the experimental cost of the coating paint in the preparation process, greatly saving the time cost and resource cost of the paint surface in the experimental process. The technical scheme of the present application modifies the epoxy polyamide component so that it can adapt to the seawater environment, and the use of the modified epoxy polyamide and bisphenol F type epoxy resin greatly improves the weather resistance of the ship ballast water tank. When sailing across different latitudes, the ship ballast tank can adapt to the temperature changes of seawater at different latitudes, protecting the ship ballast tank from seawater erosion and corrosion while reducing the probability of paint cracking. The technical scheme of the present application combines the experimental data in the preparation process of the coating paint during the paint coating process to inspect the coating result, which can improve the inspection accuracy of the paint coating result. When the standard is met, the addition of a comparison data can more accurately understand the specific reasons for the unqualified paint coating and perform targeted repair, which can improve the efficiency of the paint coating. Therefore, the technical scheme provided by the present application has high industrial utilization value because it effectively overcomes the various shortcomings in the prior art.

[0092] The above embodiments are only illustrative of the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea disclosed by the present application should be covered by the claims of the present application.

Claims

1. A ship's hold coating paint, characterized by, The raw material is prepared by at least the following components in weight parts: 30-35 parts of bisphenol F type epoxy resin, 25-30 parts of curing modified epoxy polyamide, 3-5 parts of curing agent, and 15-20 parts of pigment; wherein the preparation steps of the curing modified epoxy polyamide include: The solid polyamide resin is crushed and then added into a solvent for heating and stirring until completely dissolved, and the solvent is dimethylbenzene; the weight ratio of the solid polyamide resin to the solvent is between 1:1 and 1:3; A modifier is added to the solution of step S1, and the modifier is di-tert-butyl-p-cresol and allyl acid ester; wherein the weight ratio of di-tert-butyl-p-cresol, allyl acid ester, and polyamide resin is (0.5-2):(0.5-2):(2-10).

2. Marine vessel hold coating paint according to claim 1, characterized in that, The curing agent is diamino dimethylbenzene.

3. A painting process for painting a ship's hold, characterized in that, At least the following steps are included: P1, pretreating the surface of the steel plate of the cabin body to remove surface impurities, oil stains, and surface rust; P2, treating the defect structure of the steel plate, detecting the defect condition of the weld joint and the joint structure of the steel structure, and performing secondary reinforcement repair on the defect structure; P3, dust removal treatment is performed on the steel plate to ensure the cleanliness of the steel plate surface; P4, using the coating paint of claim 1 or 2 to coat the surface of the steel plate of the cabin body.

4. The ship hold painting process according to claim 3, characterized in that, The dust removal treatment method of step P3 is: selecting a magnetic soft plate and covering an adhesive film on one side of the magnetic soft plate; using a negative pressure cleaning equipment to clean the dust on the surface of the steel plate once; after the first cleaning, using the magnetic adhesive plate to clean the surface of the steel plate twice to ensure the cleanliness of the surface of the steel plate.

5. The ship hold painting process according to claim 3, characterized in that, The coating method of step P4 includes at least four coating processes: Performing the first spraying on the specific area of the easily corroded structure; After the first spraying is dry, performing the second spraying for paint repair; Performing the third spraying on the whole surface of the cabin body; After the third spraying is dry, performing the fourth spraying for recoating.

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