Construction process of ship cabin ground covering material

Abstract

The invention relates to the technical field of ship interior materials, and particularly discloses a construction process of a ship cabin ground covering material.According to the construction process, the surface of carbon black is coated with carboxymethyl chitosan, the dispersity of the carbon black in waterborne polyurethane and the filling compactness are improved, and then the hardness and abrasion resistance of primer are improved; boron nitride is loaded on bentonite, the wear resistance of bentonite is improved, then 1, 4-butylene glycol and 4-styrene acid are polymerized and grafted to the surface of the composite material, 4-styrene acid molecules contain two benzene rings, the hardness and aging resistance of a coating can be enhanced, and 1, 4-butylene glycol and 4-styrene acid are polymerized and grafted to the surface of the composite material. The flexibility of the coating is improved by a flexible alkyl chain segment formed by polymerizing 1, 4-butenediol; meanwhile, hydroxyl in 1, 4-butylene glycol and carboxyl in 4-styrene acid can be subjected to cross-linking reaction with epoxy groups of epoxy resin, so that the hardness and wear resistance of the coating are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship interior materials, and particularly relates to a construction process for a covering material for the floor of a ship cabin. Background Art

[0002] In the fields of ships and ocean engineering, the covering material for the cabin floor is a key component to ensure the functionality, safety, and comfort of the cabin; such materials need to meet multiple performance requirements such as waterproofing, anti-slip, wear resistance, and vibration and noise reduction, and at the same time need to adapt to changes in temperature, humidity, and mechanical loads in the complex environment of the ship.

[0003] At present, in the manufacturing and decoration projects of ships, the laying process of the covering material for the cabin floor has not reached an ideal technical level, and the traditional construction process still has the following problems: the surface treatment of the base material before construction is not standardized enough; the performance of the coating film used has defects, mainly reflected in the insufficient durability and stability in the long-term service environment. For example, the polyurethane coating is prone to hydrolysis reaction in high-temperature and high-humidity environments, resulting in coating softening or peeling, and problems such as blistering, biting the bottom, cracking, peeling, or flaking are likely to occur.

[0004] For example, Chinese patent document CN202210968433.0 discloses a covering material for a ship cabin floor and a preparation method thereof, including an organosilicon-modified polyurethane layer and a wear-resistant polyurethane layer arranged on the surface of the organosilicon-modified polyurethane layer, which solves the problems of moisture being inhaled from the floor joints and causing the covering material to absorb moisture and bulge. The organosilicon-modified polyurethane layer has excellent toughness and elasticity, meets the requirements of the floor covering material for high-strength mechanical properties, and at the same time has excellent properties such as waterproof performance, resistance to high and low temperatures, and resistance to weather aging, effectively improving the service life of the covering material and reducing the use cost; however, the wear resistance and aging resistance of the prepared covering material still need to be further improved. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a construction process for a covering material for the floor of a ship cabin.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A construction process for a covering material for the floor of a ship cabin includes the following steps:

[0008] S1. Pretreat the surface of the metal substrate

[0009] Pretreat the surface of the metal substrate to obtain a pretreated metal substrate.

[0010] In this step, the pretreatment step includes two steps of cleaning and grinding. The specific process of cleaning is as follows: ultrasonically clean the surface of the steel substrate in turn with degreasing acetone, absolute ethanol, and deionized water to remove the oil stains on its surface, and dry it for standby; then grind the surface of the metal substrate to a grade of St2.5, and wipe it with acetone. After ensuring that the surface is clean, dry, and free of dirt, apply the primer.

[0011] S2. Apply the primer

[0012] Apply polyurethane coating on the surface of the pretreated metal substrate and cure to form the primer.

[0013] In this step, the "volume product fixed weight" method is used to control the coating thickness during construction. According to the on-site needs, it is prepared and used immediately. During construction, the prepared primer is quickly dispersed on the surface of the construction part, and then scraped evenly to prevent the primer from thickening in the bucket and affecting the effect. The scraping of the prepared primer is completed within 10 minutes.

[0014] In this step, the film thickness of the primer is 50 - 100 μm.

[0015] In this step, the selected polyurethane coating includes components in parts by weight: 50 - 60 parts of waterborne polyurethane, 4 - 8 parts of modified carbon black, 10 - 15 parts of deionized water, 1 - 3 parts of dispersant, 0.5 - 1 part of leveling agent, and 0.2 - 0.3 part of defoaming agent.

[0016] In the technical solution disclosed in the present invention, the number of parts of waterborne polyurethane can be selected as 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0017] The present invention selects waterborne polyurethane as the main component of the primer. The molecular structure of waterborne polyurethane contains various polar groups, such as hydroxyl (-OH), amino (-NH2), etc. These polar groups can chemically bond or physically adsorb with the surface of the substrate to be coated, thereby enhancing the adhesion between the primer and the substrate; after the waterborne polyurethane primer dries, it forms a dense film layer, which can block substances such as water, oxygen, and corrosive gases from the outside world from contacting the substrate, and can effectively extend the service life of the material; at the same time, the chemical properties of the waterborne polyurethane primer are relatively stable and can be well compatible with a variety of topcoats. Whether it is a waterborne topcoat or a solvent-based topcoat, it can adhere well on the waterborne polyurethane primer.

[0018] In the technical solution disclosed in the present invention, the number of parts of modified carbon black can be selected as 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0019] In the technical solution disclosed by the present invention, the preparation method of the modified carbon black includes: ultrasonically dispersing carbon black in deionized water, then adding carboxymethyl chitosan thereto, stirring evenly, and performing suction filtration, washing, and drying to obtain the modified carbon black.

[0020] Specifically, the mass ratio of carbon black to carboxymethyl chitosan is 5-10:5-10. For example, 5:5, 5:8, 5:10, 8:5, 8:6, 8:10, 10:5, 10:8, 10:10 can be selected, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0021] In this step, there are hydroxyl groups on the surface of carbon black, and carboxymethyl chitosan contains hydroxyl groups and amino groups. Carboxymethyl chitosan is coated on the surface of carbon black through hydrogen bonding, improving the dispersibility of carbon black in waterborne polyurethane and the density of filling, thereby improving the hardness and wear resistance of the primer. At the same time, carbon black protects the resin and other components in the primer from ultraviolet damage by absorbing ultraviolet rays, extending the service life of the coating; in addition, carboxymethyl chitosan has good film-forming properties, further enhancing the adhesion between the primer and the substrate. The amino groups in carboxymethyl chitosan can also react with the epoxy groups of epoxy resin in the topcoat, increasing the crosslinking density, and thereby improving the hardness and wear resistance of the coating.

[0022] In the technical solution disclosed by the present invention, the deionized water can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0023] In the technical solution disclosed by the present invention, the dispersant can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0024] Among them, the dispersant is selected from at least one of BYK111, BYK161, and BYK180.

[0025] In the technical solution disclosed by the present invention, the leveling agent can be 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0026] Among them, the leveling agent is selected from BYK358N or BYK361N.

[0027] In the technical solution disclosed by the present invention, the defoamer can be 0.2 part, 0.25 part, 0.3 part, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0028] Among them, the defoamer is selected from polyether-modified silicone defoamers.

[0029] S3. Coating the topcoat

[0030] Apply a modified epoxy resin coating on the surface of the primer and cure to form the topcoat; wherein the modified epoxy resin coating includes component A and component B. Component A includes the following components in parts by weight: 80 - 100 parts of epoxy resin, 20 - 30 parts of composite modified bentonite, 5 - 10 parts of ethylene glycol diglycidyl ether, 2 - 4 parts of dispersant, 0.5 - 1 part of leveling agent, 0.2 - 0.4 part of defoamer; Component B includes the following components in parts by weight: 25 - 35 parts of aliphatic polyamine, 3 - 6 parts of methyldiethanolamine, 10 - 15 parts of isopropanol.

[0031] In this step, the construction is carried out within 1 - 12 h after the primer is dry to the touch. Before construction, ensure that the surface of the primer is clean, dry, and free of dirt; after exceeding the painting interval, the surface of the primer needs to be sanded and wiped clean with acetone to ensure that the surface is clean, dry, and free of dirt.

[0032] In this step, the film thickness of the topcoat is 40 - 60 μm.

[0033] In the technical solution disclosed in the present invention, the preparation method of the composite modified bentonite is as follows:

[0034] (1) Immerse the bentonite in an acid solution, heat and stir, then filter, wash, and dry to obtain pretreated bentonite;

[0035] (2) Disperse the pretreated bentonite in deionized water, then add boric acid and urea thereto, heat and stir, then filter, dry at low temperature, pulverize, and calcine in a nitrogen atmosphere to obtain a bentonite-supported boron nitride composite;

[0036] (3) Disperse the bentonite-supported boron nitride composite in an ethanol aqueous solution, then add vinyltriethoxysilane thereto, stir, then filter, wash, and dry to obtain a vinyl composite;

[0037] (4) Disperse the vinyl composite in an organic solvent, then add 1,4-butenediol and 4-styrenic acid thereto, stir evenly, introduce nitrogen to expel air, add the initiator benzoyl peroxide, heat and stir to react. After the reaction is completed, filter, wash, and dry to obtain the composite modified bentonite.

[0038] Specifically, in step (1), the acid solution can be selected from sulfuric acid solution, nitric acid solution, or hydrochloric acid solution.

[0039] Specifically, in step (1), the concentration of the acid solution can be selected from 0.5 - 2 mol / L. For example, it can be 0.5 mol / L, 1 mol / L, 1.5 mol / L, 2 mol / L, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0040] Specifically, in step (1), the temperature for the heating and stirring treatment is 50 - 80 °C. For example, it can be 50 °C, 55 °C, 60 °C, 65 °C, 70 °C, 75 °C, 80 °C; the time for the heating and stirring treatment is 1 - 3 h. For example, it can be 1 h, 1.5 h, 2 h, 2.5 h, 3 h, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0041] Specifically, in step (2), the mass ratio of the pretreated bentonite, boric acid, and urea is 10 - 15:2 - 3:4 - 6.

[0042] Specifically, in step (2), the temperature for the heating and stirring treatment is 75 - 90 °C. For example, it can be 75 °C, 80 °C, 85 °C, 90 °C, and the time for the heating and stirring treatment is 3 - 5 h. For example, it can be 3 h, 3.5 h, 4 h, 4.5 h, 5 h; but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0043] Specifically, in step (2), the calcination temperature is 800 - 1000 °C. For example, it can be 800 °C, 850 °C, 900 °C, 950 °C, 1000 °C; the calcination time is 1 - 2 h. For example, it can be 1 h, 1.5 h, 2 h, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0044] Specifically, in step (3), the mass ratio of the bentonite-supported boron nitride composite material and vinyltriethoxysilane is 8 - 12:1 - 3. For example, it can be 8:1, 8:2, 8:3, 10:1, 10:2, 10:3, 12:1, 12:2, 12:3, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0045] Specifically, in step (4), the mass ratio of the vinyl composite material, 1,4 - butanediol, 4 - styrenic acid, and benzoyl peroxide is 10 - 15:3 - 5:3 - 5:0.5 - 1.

[0046] Specifically, in step (4), the temperature for the heating and stirring reaction is 70 - 90 °C. For example, it can be 70 °C, 75 °C, 80 °C, 85 °C, 90 °C, and the time for the heating and stirring reaction is 2 - 4 h. For example, it can be 2 h, 2.5 h, 3 h, 3.5 h, 4 h, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0047] In the present invention, bentonite is first pretreated with an acid solution to improve its surface activity, and then boron nitride is in-situ generated on the surface of bentonite by an in-situ generation method. By loading boron nitride on bentonite, the wear resistance of bentonite is improved; subsequently, vinyltriethoxysilane is used to surface-treat the boron nitride-loaded bentonite composite to introduce carbon-carbon double bonds, which is beneficial to the subsequent reaction. Then, through the addition reaction between the double bonds, 1,4-butenediol and 4-styrenic acid are polymerized and grafted onto the surface of the composite. The 4-styrenic acid molecule contains two benzene rings, and the benzene ring structure has high rigidity and thermal stability, which can enhance the hardness and aging resistance of the coating. The flexible alkyl chain segments formed by the polymerization of 1,4-butenediol help to absorb and dissipate impact energy, relieve stress concentration, make the macromolecular chains not easily damaged, and improve the flexibility of the coating; at the same time, the hydroxyl groups in 1,4-butenediol and the carboxyl groups in 4-styrenic acid can crosslink with the epoxy groups of epoxy resin, further improving the hardness and wear resistance of the coating.

[0048] In this step, the preparation method of the modified epoxy resin coating is as follows: Weigh the raw materials according to the formula, mix epoxy resin, ethylene glycol diglycidyl ether and a dispersant evenly, then add the composite modified bentonite, and stir at a speed of 2000 - 3000 r / min for 30 - 40 min. Then add a leveling agent and an antifoaming agent, and stir at a speed of 400 - 600 r / min for 10 - 20 min to obtain Component A; Stir aliphatic polyamine, methyldiethanolamine and isopropanol at a speed of 400 - 600 r / min for 10 - 20 min to obtain Component B; Mix Component A and Component B evenly by stirring to obtain the modified epoxy resin coating.

[0049] In the technical solution disclosed in the present invention, the dispersant is selected from at least one of BYK111, BYK161, and BYK180.

[0050] In the technical solution disclosed in the present invention, the leveling agent is selected from BYK358N or BYK361N.

[0051] In the technical solution disclosed in the present invention, the antifoaming agent is selected from polyether-modified silicone antifoaming agents.

[0052] In the technical solution disclosed in the present invention, the aliphatic polyamine is selected from diethylenetriamine, triethylenetetramine, tetraethylenepentamine or diethylenetriamine.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] (1) The present invention coats carbon black on the surface through hydrogen bonding of carboxymethyl chitosan, improving the dispersibility of carbon black in waterborne polyurethane and the compactness of filling, thereby enhancing the hardness and wear resistance of the primer. Meanwhile, carbon black absorbs ultraviolet rays to protect the resin and other components in the primer from ultraviolet damage, extending the service life of the coating. In addition, carboxymethyl chitosan has good film-forming properties, further enhancing the adhesion between the primer and the substrate. The amino groups in carboxymethyl chitosan can also react with the epoxy groups of epoxy resin in the topcoat, increasing the crosslinking density and thus enhancing the hardness and wear resistance of the coating.

[0055] (2) The present invention first pretreats bentonite with an acid solution to improve its surface activity, and then in-situ generates boron nitride on the surface of bentonite by an in-situ generation method. By loading boron nitride on bentonite, the wear resistance of bentonite is improved. Subsequently, vinyltriethoxysilane is used to surface-treat the bentonite-supported boron nitride composite to introduce carbon-carbon double bonds, facilitating subsequent reactions. Then, through the addition reaction between the double bonds, 1,4-butenediol and 4-styrenic acid are polymerized and grafted on the surface of the composite. The 4-styrenic acid molecule contains two benzene rings, and the benzene ring structure has high rigidity and thermal stability, which can enhance the hardness and aging resistance of the coating. The flexible alkyl chain segments formed by the polymerization of 1,4-butenediol help absorb and dissipate impact energy, relieve stress concentration, make the macromolecular chains not easily damaged, and improve the flexibility of the coating. At the same time, the hydroxyl groups in 1,4-butenediol and the carboxyl groups in 4-styrenic acid can crosslink with the epoxy groups of epoxy resin, further enhancing the hardness and wear resistance of the coating. Specific embodiments

[0056] The following further details the present invention through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0057] It should be noted that unless otherwise specified, the chemical reagents involved in the present invention are purchased through commercial channels.

[0058] The waterborne polyurethane used in the embodiments of the present invention is purchased from Jiangsu Zunxin New Material Technology Co., Ltd.; the mesh number of carbon black is 400 mesh; the grade of epoxy resin is E-51; the mesh number of bentonite is 400 mesh; the model of the polyether-modified silicone defoamer is Tego Foamex 842.

[0059] Example 1

[0060] A construction process for a ship cabin floor covering material includes the following steps:

[0061] S1. Use degreasing acetone, absolute ethanol, and deionized water to ultrasonically clean the surface of the steel substrate in sequence to remove the oil stains on its surface, dry it, and then polish the surface of the metal substrate to a grade of St2.5 and wipe it with acetone to ensure the surface is clean, dry, and free of dirt, obtaining a pretreated metal substrate;

[0062] S2. Apply polyurethane coating on the surface of the pretreated metal substrate. The film thickness of the primer is 80 μm, and it is cured to form the primer. The polyurethane coating includes components in parts by weight: 50 parts of waterborne polyurethane, 4 parts of modified carbon black, 10 parts of deionized water, 1 part of dispersant BYK111, 0.5 part of leveling agent BYK361N, and 0.2 part of polyether-modified silicone defoamer;

[0063] Among them, the preparation method of the modified carbon black includes: ultrasonically disperse 5 g of carbon black in 100 mL of deionized water, then add 5 g of carboxymethyl chitosan to it, stir evenly, and obtain the modified carbon black after filtration, washing, and drying;

[0064] S3. Apply modified epoxy resin coating on the surface of the primer. The film thickness of the topcoat is 50 μm, and it is cured to form the topcoat;

[0065] Among them, the preparation method of the modified epoxy resin coating is as follows: Mix 80 parts of epoxy resin, 5 parts of ethylene glycol diglycidyl ether, and 2 parts of dispersant BYK111 evenly, then add 20 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 0.5 part of leveling agent BYK361N and 0.2 part of polyether-modified silicone defoamer, and stir at a speed of 400 r / min for 15 min to obtain component A; Stir 25 parts of triethylenetetramine, 3 parts of methyldiethanolamine, and 10 parts of isopropanol at a speed of 400 r / min for 15 min to obtain component B; Mix and stir component A and component B evenly to obtain the modified epoxy resin coating;

[0066] The preparation method of the composite modified bentonite is as follows:

[0067] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash, and dry to obtain pretreated bentonite;

[0068] (2) Disperse 10 g of pretreated bentonite in 100 mL of deionized water, then add 2 g of boric acid and 4 g of urea to it, heat and stir at 80 °C for 4 h, then filter, dry at low temperature, crush and pass through a 400-mesh sieve, and calcine in a nitrogen atmosphere. The calcination temperature is 800 °C, and the calcination time is 2 h to obtain the bentonite-supported boron nitride composite material;

[0069] (3) Disperse 10 g of bentonite-supported boron nitride composite material in 100 mL of ethanol aqueous solution (the volume ratio of ethanol to water is 3:1), then add 2 g of vinyltriethoxysilane to it, stir for 2 h at room temperature, and then filter, wash, and dry to obtain a vinyl composite material;

[0070] (4) Disperse 10 g of vinyl composite material in 100 mL of organic solvent DMF, then add 3 g of 1,4-butanediol and 3 g of 4-styrenic acid, stir evenly, pass nitrogen to expel air, add 0.5 g of initiator benzoyl peroxide, heat and stir the reaction at 80 °C for 3 h. After the reaction is completed, filter, wash, and dry to obtain a composite modified bentonite.

[0071] Example 2

[0072] A construction process for a ship cabin floor covering material includes the following steps:

[0073] S1. Use degreasing acetone, absolute ethanol, and deionized water to ultrasonically clean the surface of the steel substrate in sequence to remove the oil stains on its surface, dry it, then polish the surface of the metal substrate to a grade of St2.5, and wipe it with acetone to ensure the surface is clean, dry, and free of dirt to obtain a pretreated metal substrate;

[0074] S2. Apply polyurethane coating on the surface of the pretreated metal substrate, and the film thickness of the primer is 80 μm, and cure to form a primer. The polyurethane coating includes components in parts by weight: 60 parts of waterborne polyurethane, 8 parts of modified carbon black, 15 parts of deionized water, 3 parts of dispersant BYK180, 1 part of leveling agent BYK358N, and 0.3 part of polyether-modified organosilicon defoamer;

[0075] Among them, the preparation method of the modified carbon black includes: ultrasonically disperse 5 g of carbon black in 100 mL of deionized water, then add 8 g of carboxymethyl chitosan to it, stir evenly, and obtain the modified carbon black through suction filtration, washing, and drying;

[0076] S3. Apply modified epoxy resin coating on the surface of the primer, and the film thickness of the topcoat is 40 μm, and cure to form a topcoat;

[0077] The preparation method of the modified epoxy resin coating is as follows: Mix 90 parts of epoxy resin, 8 parts of ethylene glycol diglycidyl ether and 3 parts of dispersant BYK111 evenly, then add 25 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 0.8 part of leveling agent BYK361N and 0.3 part of polyether modified silicone defoamer, stir at a speed of 400 r / min for 15 min to obtain Component A; Stir 30 parts of diethylenetriamine, 5 parts of methyldiethanolamine and 12 parts of isopropanol at a speed of 400 r / min for 15 min to obtain Component B; Mix Component A and Component B evenly by stirring to obtain the modified epoxy resin coating;

[0078] The preparation method of the composite modified bentonite is as follows:

[0079] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash and dry to obtain pretreated bentonite;

[0080] (2) Disperse 15 g of pretreated bentonite in 100 mL of deionized water, then add 3 g of boric acid and 6 g of urea thereto, heat and stir at 80 °C for 4 h, then filter, dry at low temperature, crush through a 400-mesh sieve, and calcine in a nitrogen atmosphere at a calcination temperature of 1000 °C and a calcination time of 1 h to obtain a bentonite-supported boron nitride composite;

[0081] (3) Disperse 12 g of the bentonite-supported boron nitride composite in 100 mL of an ethanol aqueous solution (the volume ratio of ethanol to water is 3:1), then add 3 g of vinyltriethoxysilane thereto, stir at room temperature for 2 h, then filter, wash and dry to obtain a vinyl composite;

[0082] (4) Disperse 15 g of the vinyl composite in 100 mL of an organic solvent DMF, then add 5 g of 1,4-butanediol and 5 g of 4-styrenic acid thereto, stir evenly, purge with nitrogen to remove air, add 1 g of initiator benzoyl peroxide, heat and stir at 80 °C for 3 h. After the reaction is completed, filter, wash and dry to obtain the composite modified bentonite.

[0083] Example 3

[0084] A construction process for a ship cabin floor covering material includes the following steps:

[0085] S1. Ultrasonically clean the surface of the steel substrate in turn with degreasing acetone, absolute ethanol and deionized water to remove the oil stain on its surface, dry it, then polish the surface of the metal substrate to a grade of St2.5, and wipe it with acetone to ensure that the surface is clean, dry and free of dirt to obtain a pretreated metal substrate;

[0086] S2. Apply polyurethane coating on the surface of the pretreated metal substrate. The film thickness of the primer is 100 μm, and it is cured to form the primer. The polyurethane coating includes components by weight: 55 parts of waterborne polyurethane, 6 parts of modified carbon black, 10 parts of deionized water, 2 parts of dispersant BYK180, 0.8 part of leveling agent BYK361N, and 0.3 part of polyether-modified silicone defoamer.

[0087] Among them, the preparation method of the modified carbon black includes: ultrasonically disperse 5 g of carbon black in 100 mL of deionized water, then add 10 g of carboxymethyl chitosan thereto, stir evenly, and obtain the modified carbon black through suction filtration, washing, and drying.

[0088] S3. Apply modified epoxy resin coating on the surface of the primer. The film thickness of the topcoat is 60 μm, and it is cured to form the topcoat.

[0089] The preparation method of the modified epoxy resin coating is as follows: Mix 100 parts of epoxy resin, 10 parts of ethylene glycol diglycidyl ether, and 4 parts of dispersant BYK111 evenly, then add 30 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 1 part of leveling agent BYK361N and 0.4 part of polyether-modified silicone defoamer, and stir at a speed of 400 r / min for 15 min to obtain component A; Stir 35 parts of triethylenetetramine, 6 parts of methyldiethanolamine, and 15 parts of isopropanol at a speed of 400 r / min for 15 min to obtain component B; Mix and stir component A and component B evenly to obtain the modified epoxy resin coating.

[0090] The preparation method of the composite modified bentonite is as follows:

[0091] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash, and dry to obtain pretreated bentonite.

[0092] (2) Disperse 12 g of pretreated bentonite in 100 mL of deionized water, then add 2 g of boric acid and 5 g of urea thereto, heat and stir at 75 °C for 5 h, then filter, dry at low temperature, pulverize and pass through a 400-mesh sieve, and calcine in a nitrogen atmosphere. The calcination temperature is 800 °C, and the calcination time is 2 h to obtain bentonite-supported boron nitride composite.

[0093] (3) Disperse 8 g of bentonite-supported boron nitride composite in 100 mL of ethanol aqueous solution (the volume ratio of ethanol to water is 3:1), then add 1 g of vinyltriethoxysilane thereto, stir at room temperature for 2 h, then filter, wash, and dry to obtain vinyl composite.

[0094] (4) Disperse 12 g of vinyl composite material in 100 mL of organic solvent DMF, then add 3 g of 1,4-butanediol and 5 g of 4-styrenic acid thereto, stir evenly, pass nitrogen to expel air, add 0.8 g of initiator benzoyl peroxide, and heat and stir at 70 °C for 4 h. After the reaction is completed, filter, wash, and dry to obtain composite modified bentonite.

[0095] Comparative Example 1

[0096] A construction process for a ship cabin floor covering material includes the following steps:

[0097] S1. Ultrasonically clean the surface of the steel substrate in sequence with degreasing acetone, absolute ethanol, and deionized water to remove the oil stains on its surface, dry it, then polish the surface of the metal substrate to a grade of St2.5, and wipe it with acetone to ensure the surface is clean, dry, and free of dirt, obtaining a pretreated metal substrate;

[0098] S2. Apply polyurethane coating on the surface of the pretreated metal substrate, with the film thickness of the primer being 80 μm, and cure to form the primer. The polyurethane coating includes components in parts by weight: 50 parts of waterborne polyurethane, 4 parts of carbon black, 10 parts of deionized water, 1 part of dispersant BYK111, 0.5 part of leveling agent BYK361N, and 0.2 part of polyether modified silicone defoamer;

[0099] S3. Apply modified epoxy resin coating on the surface of the primer, with the film thickness of the topcoat being 50 μm, and cure to form the topcoat;

[0100] The preparation method of the modified epoxy resin coating is as follows: Mix 80 parts of epoxy resin, 5 parts of ethylene glycol diglycidyl ether, and 2 parts of dispersant BYK111 evenly, then add 20 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 0.5 part of leveling agent BYK361N and 0.2 part of polyether modified silicone defoamer, and stir at a speed of 400 r / min for 15 min to obtain component A; Stir 25 parts of triethylenetetramine, 3 parts of methyldiethanolamine, and 10 parts of isopropanol at a speed of 400 r / min for 15 min to obtain component B; Mix and stir component A and component B evenly to obtain the modified epoxy resin coating;

[0101] The preparation method of the composite modified bentonite is as follows:

[0102] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash, and dry to obtain pretreated bentonite;

[0103] (2) Disperse 10 g of pretreated bentonite in 100 mL of deionized water, then add 2 g of boric acid and 4 g of urea thereto, heat and stir at 80 °C for 4 h, then filter, dry at low temperature, pulverize and sieve through a 400-mesh sieve, and calcine in a nitrogen atmosphere at a calcination temperature of 800 °C for 2 h to obtain a bentonite-supported boron nitride composite material;

[0104] (3) Disperse 10 g of the bentonite-supported boron nitride composite material in 100 mL of an ethanol aqueous solution (volume ratio of ethanol to water is 3:1), then add 2 g of vinyltriethoxysilane thereto, stir at room temperature for 2 h, then filter, wash and dry to obtain a vinyl composite material;

[0105] (4) Disperse 10 g of the vinyl composite material in 100 mL of an organic solvent DMF, then add 3 g of 1,4-butanediol and 3 g of 4-styrenic acid thereto, stir evenly, pass nitrogen to expel air, add 0.5 g of initiator benzoyl peroxide, heat and stir at 80 °C for 3 h, after the reaction is completed, filter, wash and dry to obtain a composite modified bentonite.

[0106] Compared with Example 1, in Comparative Example 1, the carbon black was not modified.

[0107] Comparative Example 2

[0108] A construction process for a ship cabin floor covering material includes the following steps:

[0109] S1. Ultrasonically clean the surface of the steel substrate in turn with degreasing acetone, absolute ethanol and deionized water to remove the oil stains on its surface, dry, then polish the surface of the metal substrate to a grade of St2.5, and wipe with acetone to ensure the surface is clean, dry and free of dirt to obtain a pretreated metal substrate;

[0110] S2. Apply a polyurethane coating on the surface of the pretreated metal substrate, the film thickness of the primer is 80 μm, and cure to form a primer. The polyurethane coating includes components in parts by weight: 50 parts of waterborne polyurethane, 4 parts of modified carbon black, 10 parts of deionized water, 1 part of dispersant BYK111, 0.5 part of leveling agent BYK361N, 0.2 part of polyether-modified organosilicon defoamer;

[0111] Among them, the preparation method of the modified carbon black includes: ultrasonically disperse 5 g of carbon black in 100 mL of deionized water, then add 5 g of carboxymethyl chitosan thereto, stir evenly, filter by suction, wash and dry to obtain modified carbon black;

[0112] S3. Apply a modified epoxy resin coating on the surface of the primer, the film thickness of the topcoat is 50 μm, and cure to form a topcoat;

[0113] The preparation method of the modified epoxy resin coating is as follows: Mix 80 parts of epoxy resin, 5 parts of ethylene glycol diglycidyl ether, and 2 parts of dispersant BYK111 evenly, then add 20 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 0.5 part of leveling agent BYK361N and 0.2 part of polyether modified silicone defoamer, and stir at a speed of 400 r / min for 15 min to obtain Component A; Stir 25 parts of triethylenetetramine, 3 parts of methyldiethanolamine, and 10 parts of isopropanol at a speed of 400 r / min for 15 min to obtain Component B; Mix and stir Component A and Component B evenly to obtain the modified epoxy resin coating;

[0114] The preparation method of the composite modified bentonite is as follows:

[0115] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash, and dry to obtain pretreated bentonite;

[0116] (2) Disperse 10 g of pretreated bentonite in 100 mL of ethanol aqueous solution (the volume ratio of ethanol to water is 3:1), then add 2 g of vinyltriethoxysilane to it, stir at room temperature for 2 h, then filter, wash, and dry to obtain vinyl bentonite;

[0117] (3) Disperse 10 g of vinyl bentonite in 100 mL of organic solvent DMF, then add 3 g of 1,4-butanediol and 3 g of 4-styrenic acid to it, stir evenly, pass nitrogen to exhaust air, add 0.5 g of initiator benzoyl peroxide, heat and stir at 80 °C for 3 h, after the reaction is completed, filter, wash, and dry to obtain the composite modified bentonite.

[0118] Compared with Example 1, in Comparative Example 2, boron nitride was not loaded on the bentonite.

[0119] Comparative Example 3

[0120] A construction process for a ship cabin floor covering material includes the following steps:

[0121] S1. Use degreasing acetone, absolute ethanol, and deionized water to ultrasonically clean the surface of the steel substrate in sequence to remove the oil stains on its surface, dry it, then polish the surface of the metal substrate to a grade of St2.5, and wipe it with acetone to ensure the surface is clean, dry, and free of dirt to obtain the pretreated metal substrate;

[0122] S2. Apply polyurethane coating on the surface of the pretreated metal substrate. The film thickness of the primer is 80 μm, and it is cured to form the primer. The polyurethane coating includes components in parts by weight: 50 parts of waterborne polyurethane, 4 parts of modified carbon black, 10 parts of deionized water, 1 part of dispersant BYK111, 0.5 part of leveling agent BYK361N, and 0.2 part of polyether-modified silicone defoamer.

[0123] Among them, the preparation method of the modified carbon black includes: ultrasonically disperse 5 g of carbon black in 100 mL of deionized water, then add 5 g of carboxymethyl chitosan thereto, stir evenly, and obtain the modified carbon black through suction filtration, washing, and drying.

[0124] S3. Apply modified epoxy resin coating on the surface of the primer. The film thickness of the topcoat is 50 μm, and it is cured to form the topcoat.

[0125] Among them, the preparation method of the modified epoxy resin coating is as follows: Mix 80 parts of epoxy resin, 5 parts of ethylene glycol diglycidyl ether, and 2 parts of dispersant BYK111 evenly, then add 20 parts of composite modified bentonite, stir at a speed of 2000 r / min for 30 min, then add 0.5 part of leveling agent BYK361N and 0.2 part of polyether-modified silicone defoamer, and stir at a speed of 400 r / min for 15 min to obtain component A; Stir 25 parts of triethylenetetramine, 3 parts of methyldiethanolamine, and 10 parts of isopropanol at a speed of 400 r / min for 15 min to obtain component B; Mix and stir component A and component B evenly to obtain the modified epoxy resin coating.

[0126] The preparation method of the composite modified bentonite is as follows:

[0127] (1) Immerse 10 g of bentonite in 100 mL of 1 mol / L nitric acid solution, heat and stir at 60 °C for 2 h, then filter, wash, and dry to obtain pretreated bentonite.

[0128] (2) Disperse 10 g of pretreated bentonite in 100 mL of deionized water, then add 2 g of boric acid and 4 g of urea thereto, heat and stir at 80 °C for 4 h, then filter, dry at low temperature, crush and pass through a 400-mesh sieve, and calcine in a nitrogen atmosphere. The calcination temperature is 800 °C, and the calcination time is 2 h to obtain bentonite-supported boron nitride composite material.

[0129] (3) Disperse 10 g of bentonite-supported boron nitride composite material in 100 mL of ethanol aqueous solution (the volume ratio of ethanol to water is 3:1), then add 2 g of vinyltriethoxysilane thereto, stir at room temperature for 2 h, then filter, wash, and dry to obtain vinyl composite material.

[0130] (4) Disperse 10 g of vinyl composite material in 100 mL of organic solvent DMF, then add 3 g of 1,4-butanediol thereto, stir evenly, introduce nitrogen to expel air, add 0.5 g of initiator benzoyl peroxide, and heat and stir for reaction at 80 °C for 3 h. After the reaction is completed, filter, wash, and dry to obtain composite modified bentonite.

[0131] Comparing Comparative Example 3 with Example 1, 4-styrenic acid was not added.

[0132] Perform performance tests on the covering materials prepared in Examples 1-3 and Comparative Examples 1-3. The specific steps are as follows:

[0133] Abrasion resistance test: Conduct the test in accordance with GB / T 1768-2006 "Determination of abrasion resistance of paints and varnishes - Rotating rubber wheel method", and use a CS-17 wheel to measure the weight loss at a load of 1 kg and 1000 revolutions;

[0134] Hardness test: Conduct the test in accordance with GB / T 6739-2022 "Determination of film hardness of paints and varnishes by pencil method";

[0135] Adhesion test: Conduct the test in accordance with GB / T 5210-2006 "Pull-off adhesion test for paints and varnishes";

[0136] Artificial weathering resistance test: Conduct the test in accordance with GB / T 23987-2009 "Artificial weathering exposure of paints and varnishes - Exposure to fluorescent ultraviolet light and water", and mark >900 to represent that the appearance of the coating has not changed after 900 h of aging test, but the appearance of the coating has changed after 1000 h, and so on.

[0137] Table 1 Performance test results of different groups

[0138]

[0139]

[0140] Finally, it should be noted that the above embodiments do not limit the present invention in any form. For those skilled in the art, based on the present invention, some modifications and improvements can be made. Therefore, any modification or improvement made without departing from the spirit of the present invention falls within the scope of protection required by the present invention.

Claims

1. A construction process for a covering material for the floor of a ship's cabin, characterized in that, It includes the following steps: S1. Pretreat the surface of the metal substrate to obtain a pretreated metal substrate; S2. Coat a polyurethane coating on the surface of the pretreated metal substrate and cure it to form a primer. The polyurethane coating includes components in parts by weight: 50 - 60 parts of waterborne polyurethane, 4 - 8 parts of modified carbon black, 10 - 15 parts of deionized water, 1 - 3 parts of dispersant, 0.5 - 1 part of leveling agent, and 0.2 - 0.3 part of defoaming agent; Among them, the preparation method of the modified carbon black includes: ultrasonically disperse carbon black in deionized water, then add carboxymethyl chitosan thereto, stir evenly, and obtain modified carbon black through suction filtration, washing, and drying; S3. Coat a modified epoxy resin coating on the surface of the primer and cure it to form a topcoat. The modified epoxy resin coating includes component A and component B. Component A includes components in parts by weight: 80 - 100 parts of epoxy resin, 20 - 30 parts of composite modified bentonite, 5 - 10 parts of ethylene glycol diglycidyl ether, 2 - 4 parts of dispersant, 0.5 - 1 part of leveling agent, and 0.2 - 0.4 part of defoaming agent; Component B includes components in parts by weight: 25 - 35 parts of aliphatic polyamine, 3 - 6 parts of methyldiethanolamine, and 10 - 15 parts of isopropanol.

2. The construction process according to claim 1, wherein In step S3, the preparation method of the composite modified bentonite is as follows: (1) Immerse bentonite in an acid solution, heat and stir for treatment, and then obtain pretreated bentonite through filtration, washing, and drying; (2) Disperse the pretreated bentonite in deionized water, then add boric acid and urea thereto, heat and stir for treatment, and then obtain a bentonite - supported boron nitride composite through filtration, low - temperature drying, pulverization, and calcination in a nitrogen atmosphere; (3) Disperse the bentonite - supported boron nitride composite in an ethanol - aqueous solution, then add vinyltriethoxysilane thereto, stir for treatment, and then obtain a vinyl composite through filtration, washing, and drying; (4) Disperse the vinyl composite in an organic solvent, then add 1,4 - butanediol and 4 - styrenic acid thereto, stir evenly, pass nitrogen to expel air, add initiator benzoyl peroxide, heat and stir for reaction. After the reaction is completed, obtain composite modified bentonite through filtration, washing, and drying.

3. The construction process according to claim 2, characterized in that, In step (2), the mass ratio of the pretreated bentonite, boric acid, and urea is 10 - 15:2 - 3:4 - 6.

4. The construction process according to claim 2, characterized in that, In step (2), the temperature of the heat - stirring treatment is 75 - 90 °C, and the time of the heat - stirring treatment is 3 - 5 h; the calcination temperature is 800 - 1000 °C, and the calcination time is 1 - 2 h.

5. The construction process according to claim 2, characterized in that, In step (3), the mass ratio of the bentonite - supported boron nitride composite and vinyltriethoxysilane is 8 - 12:1 - 3.

6. The construction process according to claim 2, characterized in that, In step (4), the mass ratio of the vinyl composite, 1,4 - butanediol, 4 - styrenic acid, and benzoyl peroxide is 10 - 15:3 - 5:3 - 5:0.5 - 1.

7. The construction process according to claim 2, characterized in that, In step (4), the temperature of the heat - stirring reaction is 70 - 90 °C, and the time of the heat - stirring reaction is 2 - 4 h.

8. The construction process according to claim 2, wherein In step S3, the preparation method of the modified epoxy resin coating is as follows: Weigh the raw materials according to the formula, mix epoxy resin, ethylene glycol diglycidyl ether and a dispersant evenly, then add composite modified bentonite, and stir at a rotation speed of 2000 - 3000 r / min for 30 - 40 min. Then add a leveling agent and an antifoaming agent, and stir at a rotation speed of 400 - 600 r / min for 10 - 20 min to obtain component A; Stir aliphatic polyamine, methyldiethanolamine and isopropanol at a rotation speed of 400 - 600 r / min for 10 - 20 min to obtain component B; Mix component A and component B evenly by stirring to obtain the modified epoxy resin coating.

9. The construction process according to claim 1, characterized in that, The dispersant is selected from at least one of BYK111, BYK161, and BYK180; the leveling agent is selected from BYK358N or BYK361N; the antifoaming agent is selected from polyether-modified silicone antifoaming agents.

10. The construction process according to claim 1, characterized in that, The aliphatic polyamine is selected from diethylenetriamine, triethylenetetramine, tetraethylenepentamine or diethylenetriamine.

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