A flame retardant and wear-resistant water-based coating and its preparation method and application

Abstract

The present invention provides a flame retardant and wear-resistant water-based coating and a preparation method and application thereof, and relates to the technical field of coatings. The flame retardant and wear-resistant water-based coating of the present invention comprises the following raw materials in parts by weight: 90-100 parts of modified polyurethane emulsion, 30-34 parts of filler, 0.5-1 parts of leveling agent, 1-2 parts of thickener, 1-3 parts of film-forming aid, 2.8-3.2 parts of defoamer, and 32-36 parts of water. The water-based coating of the present invention has good flame retardancy, certain fire resistance and wear resistance, and further reduces the emission of volatile organic compounds. No additional protective construction is required in a closed environment, and the coating is non-flammable during construction, no additional fire protection is required, safe to use, no toxic side effects, beneficial to human health, and expands the scope of application of the coating.

Description

Technical Field

[0001] The invention relates to the technical field of water-based coatings, and in particular to a flame-retardant and wear-resistant water-based coating and a preparation method and application thereof. Background Art

[0002] Water-based paints have been widely used in the construction, furniture, automobile and other industries in recent years due to their environmental protection and low VOC emissions. However, existing water-based paints generally have some problems, such as poor wear resistance and insufficient flame retardancy, which limits their application scope. Especially in areas with high fire protection requirements, such as construction and electronic products, the flame retardancy of existing water-based paints cannot meet the requirements.

[0003] At present, in order to improve the flame retardant properties of water-based coatings, a large amount of flame retardants, such as brominated flame retardants, are usually added to the coatings. However, these flame retardants often contain harmful substances that pose a potential threat to the environment and human health; at the same time, these flame retardants will also increase the cost and production complexity of the coatings.

[0004] Based on this, the present invention provides a flame retardant and wear-resistant water-based paint and a preparation method and application thereof. The water-based paint has the characteristics of flame retardancy and wear resistance, and can effectively protect the base material. Summary of the invention

[0005] The purpose of the present invention is to provide a flame-retardant and wear-resistant water-based coating, a preparation method and application thereof. The prepared water-based coating has good flame retardancy, certain fire resistance and wear resistance, can also reduce the emission of volatile organic compounds, and does not require additional protective construction in a closed environment. The coating is non-flammable during the construction process, does not require additional fire protection, is safe to use, has no toxic side effects, is beneficial to human health, and expands the application range of the coating.

[0006] On the one hand, the present invention provides a flame retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 90-100 parts of modified polyurethane emulsion, 30-34 parts of filler, 0.5-1 part of leveling agent, 1-2 parts of thickener, 1-3 parts of film-forming aid, 2.8-3.2 parts of defoaming agent, and 32-36 parts of water.

[0007] Furthermore, the preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 80-90° C. for 1-2 hours, cooling to 70-74° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1-1.2 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1-1.5 hours, then adding triethylamine and acetone, stirring at 200-300 r / min for 20-30 minutes, then adding ethylenediamine and deionized water, continuing to stir at 600-800 r / min for 40-60 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of -0.08 MPa to obtain the modified polyurethane emulsion.

[0008] Furthermore, the mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (35-40): (32-38): (6-10): (15-17): (0.1-0.2): (5-7): (3-5): (3-5): (40-46): (6-7): (180-200).

[0009] Furthermore, the molecular weight of the polypropylene glycol is 2200-2400.

[0010] Furthermore, the filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (10-15): (6-8): (15-19).

[0011] Furthermore, the preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2-3) at 380-400 r / min for 5-7 minutes.

[0012] Furthermore, the preparation method of the modified basalt includes: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 30-40 minutes, centrifuging and separating the solid, and drying the solid at a temperature of 100°C.

[0013] Furthermore, the leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener or 481HEC thickener; the film-forming aid is alcohol ester twelve, and the defoamer is BYK-024 defoamer.

[0014] On the other hand, the present invention also provides a method for preparing a flame-retardant and wear-resistant water-based coating, the steps comprising: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 500-600r / min for 10-15min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 800-1000r / min for 20-26min to obtain the flame-retardant and wear-resistant water-based coating.

[0015] The flame-retardant and wear-resistant water-based paint prepared in the present invention is applied to wood, metal, craft toys, plastic, rubber, paper or glass substrates.

[0016] The beneficial effects of the present invention are:

[0017] (1) In the present invention, polyurethane is modified by using melamine formaldehyde resin and butyl etherified urea-formaldehyde resin in a weight ratio of (5-7): (3-5), and the obtained modified polyurethane emulsion is used as a raw material for coating. The amino resin modified polyurethane emulsion can significantly improve the pencil hardness, impact resistance and other properties of the coating; in addition, since the amino resin can generate inert gas to isolate oxygen and reduce the combustion propagation speed during combustion, it itself has a certain flame retardancy, so this modified emulsion can also improve the flame retardancy of the coating to a certain extent;

[0018] (2) The fillers in the coating of the present invention are modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (10-15): (6-8): (15-19), and the three fillers have good interface adhesion with the modified polyurethane emulsion; in addition, the modified polytetrafluoroethylene powder and basalt material can be better dispersed in the organic system, play a skeleton role, make the structure of the coating complete and dense, and effectively improve the wear resistance of the coating;

[0019] (3) The aluminum hydroxide in the present invention can be used as a flame retardant material in the coating. In the present application, it is compounded with modified basalt and polytetrafluoroethylene powder. When the coating burns, the basalt is scattered in the flame and the unburned area, which hinders the feedback of heat, so that the heat released during combustion cannot be quickly and massively fed back to the unburned area. Therefore, it is difficult for the unburned area to maintain intense combustion, thereby playing a flame retardant role.

[0020] (4) Polytetrafluoroethylene has good stability, excellent chemical corrosion resistance, good flame retardancy, excellent aging resistance, excellent high and low temperature resistance and good lubricity, etc.; however, its low surface energy and poor wettability make it difficult to mix with other materials. In the present invention, polytetrafluoroethylene is modified to increase the surface energy and improve the surface inertness without weakening the properties of polytetrafluoroethylene itself. It is used as a filler for water-based coatings, which can effectively improve the flame retardancy and wear resistance of the coatings;

[0021] (5) The water-based paint of the present invention uses water as a dispersion medium, and a firm coating film can be formed after the water evaporates, and construction can be carried out without visible water; during the drying process, water vapor from the ground will not have a significant impact on it, and even if it is thickly coated, it will not cause bubbling; after drying and forming a film, since the film-forming material itself is air-permeable and can allow water vapor to pass through, the continuous evaporation of water vapor from the base ground is not likely to cause hollowing of the paint film;

[0022] (6) The water-based paint of the present invention has good flame retardancy, certain fire resistance and wear resistance, and also reduces the emission of volatile organic compounds. No additional protective construction is required in a closed environment. The paint is non-flammable during the construction process, and no additional fire protection is required. It is safe to use, has no toxic side effects, is beneficial to human health, and expands the application range of the paint. It can be used on substrates such as wood, metal, craft toys, plastic, rubber, paper or glass.

[0023] (7) The present invention formulates the raw materials and process for preparing water-based coatings, effectively improves the synergistic effect between the raw materials, and also optimizes the flame retardant and wear-resistant properties of the water-based coatings to the maximum extent. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] The present embodiment provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0027] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0028] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0029] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0030] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0031] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0032] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0033] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0034] Example 2

[0035] The present embodiment provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 90 parts of modified polyurethane emulsion, 30 parts of filler, 0.5 parts of leveling agent, 1 part of thickener, 1 part of film-forming aid, 2.8 parts of defoaming agent, and 32 parts of water;

[0036] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 80° C. for 2 hours, cooling to 70° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.2 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1 hour, adding triethylamine and acetone, stirring at 200 r / min for 20 minutes, adding ethylenediamine and deionized water, continuing to stir at 600 r / min for 60 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of -0.08 MPa to obtain the modified polyurethane emulsion;

[0037] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (35): (32): (6): (15): (0.1): (5): (3): (3): (40): (6): (180); the molecular weight of the polypropylene glycol is 2200-2400;

[0038] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (10): (6): (15);

[0039] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2) at 380 r / min for 5 minutes to obtain the modified polytetrafluoroethylene powder;

[0040] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 30 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0041] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0042] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 600 r / min for 15 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 800 r / min for 26 min to obtain the flame-retardant and wear-resistant water-based coating.

[0043] Example 3

[0044] The present embodiment provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 100 parts of modified polyurethane emulsion, 34 parts of filler, 1 part of leveling agent, 2 parts of thickener, 3 parts of film-forming aid, 3.2 parts of defoaming agent, and 36 parts of water;

[0045] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 90° C. for 1 hour, cooling to 74° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1 hour, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.5 hours, adding triethylamine and acetone, stirring at 300 r / min for 20 minutes, adding ethylenediamine and deionized water, continuing to stir at 800 r / min for 40 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of -0.08 MPa to obtain the modified polyurethane emulsion;

[0046] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (40): (38): (10): (17): (0.2): (7): (5): (5): (46): (7): (200); the molecular weight of the polypropylene glycol is 2400;

[0047] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (15): (8): (19);

[0048] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(3) at 400 r / min for 7 minutes to obtain the modified polytetrafluoroethylene powder;

[0049] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 40 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0050] The leveling agent is BYK-323 leveling agent; the thickener is 481HEC thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0051] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 600 r / min for 10 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 1000 r / min for 20 min to obtain the flame-retardant and wear-resistant water-based coating.

[0052] Example 4

[0053] The present embodiment provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 94 parts of modified polyurethane emulsion, 31 parts of filler, 0.6 parts of leveling agent, 1.2 parts of thickener, 1.3 parts of film-forming aid, 3.1 parts of defoaming agent, and 35 parts of water;

[0054] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.6 hours, cooling to 73° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1 hour, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1-1.5 hours, adding triethylamine and acetone, stirring at 260 r / min for 26 minutes, adding ethylenediamine and deionized water, continuing to stir at 650 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0055] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (36): (36): (7): (16): (0.1): (6): (5): (3): (40): (7): (192); the molecular weight of the polypropylene glycol is 2200;

[0056] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (13): (7): (17);

[0057] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2) at 400 r / min for 5-7 minutes to obtain the modified polytetrafluoroethylene powder;

[0058] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 40 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0059] The leveling agent is BYK-323 leveling agent; the thickener is 481HEC thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0060] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 560 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 25 min to obtain the flame-retardant and wear-resistant water-based coating.

[0061] Test Example 1: The properties of the coatings prepared in the above Examples 1-4 were investigated, and the prepared water-based coatings were tested as follows:

[0062] The wear resistance test is in accordance with GB / T22374-2018 standard;

[0063] Chemical resistance test: Tested according to GB / T1763-79 (89), including salt water resistance (10% NaCl, 30 days), acid resistance (10% H2SO4, 30 days), alkali resistance (10% NaOH, 30 days);

[0064] The test results are shown in Table 1 below:

[0065] Table 1

[0066]

[0067] In order to explore the influence of the selection of amino resin on the coating performance, comparative examples 1-2 are set as follows in the present invention:

[0068] Comparative Example 1

[0069] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0070] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0071] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (10): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0072] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0073] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0074] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0075] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0076] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0077] Comparative Example 2

[0078] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0079] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding butylated urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0080] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (10): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0081] The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0082] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0083] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0084] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0085] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0086] Test Example 3: The properties of the coating prepared in the above-mentioned Comparative Examples 1-2 were investigated, and the test results are shown in Table 2 below:

[0087] Table 2

[0088]

[0089] In order to explore the influence of the selection of filler type on the coating performance, comparative examples 3-11 are set as follows in the present invention:

[0090] Comparative Example 3

[0091] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0092] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0093] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0094] The filler comprises polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0095] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0096] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0097] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0098] Comparative Example 4

[0099] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0100] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0101] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0102] The filler comprises modified basalt and aluminum hydroxide in a weight ratio of (7):(17);

[0103] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0104] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0105] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0106] Comparative Example 5

[0107] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0108] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0109] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0110] The filler comprises modified polytetrafluoroethylene powder, basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0111] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0112] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0113] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0114] Comparative Example 6

[0115] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0116] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0117] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0118] The filler comprises modified polytetrafluoroethylene powder and aluminum hydroxide in a weight ratio of (12):(17);

[0119] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0120] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0121] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0122] Comparative Example 7

[0123] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0124] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0125] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0126] The filler comprises modified polytetrafluoroethylene powder and modified basalt in a weight ratio of (12):(7);

[0127] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0128] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0129] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0130] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0131] Comparative Example 8

[0132] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0133] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0134] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0135] The filler comprises polytetrafluoroethylene powder, basalt and aluminum hydroxide in a weight ratio of (12): (7): (17);

[0136] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0137] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0138] Comparative Example 9

[0139] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0140] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0141] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0142] The filler is aluminum hydroxide; the leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate, and the defoamer is BYK-024 defoamer.

[0143] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0144] Comparative Example 10

[0145] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0146] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0147] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0148] Wherein, the filler is modified polytetrafluoroethylene powder;

[0149] The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2.5) at 390 r / min for 6 minutes;

[0150] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0151] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0152] Comparative Example 11

[0153] This comparative example provides a flame-retardant and wear-resistant water-based coating, comprising the following materials in parts by weight: 95 parts of modified polyurethane emulsion, 32 parts of filler, 0.7 parts of leveling agent, 1.5 parts of thickener, 2 parts of film-forming aid, 3 parts of defoaming agent, and 34 parts of water;

[0154] The preparation method of the modified polyurethane emulsion comprises: mixing hexamethylene diisocyanate and polypropylene glycol, reacting at a temperature of 85° C. for 1.5 hours, cooling to 72° C., adding 1,4-butanediol, 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate to react for 1.1 hours, adding melamine formaldehyde resin and butyl etherified urea-formaldehyde resin to continue reacting for 1.2 hours, adding triethylamine and acetone, stirring at 250 r / min for 25 minutes, adding ethylenediamine and deionized water, continuing to stir at 700 r / min for 50 minutes, and finally distilling off acetone under reduced pressure at 50° C. and a vacuum degree of −0.08 MPa to obtain the modified polyurethane emulsion;

[0155] The mass ratio of hexamethylene diisocyanate, polypropylene glycol, 1,4-butanediol, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, melamine formaldehyde resin, butylated urea-formaldehyde resin, triethylamine, acetone, ethylenediamine and deionized water is: (37): (36): (8): (16): (0.15): (6): (4): (4): (43): (6.5): (190); the molecular weight of the polypropylene glycol is 2300;

[0156] Wherein, the filler is modified basalt;

[0157] The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as a solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 35 minutes, centrifuging to separate the solid, and drying the solid at a temperature of 100°C to obtain the modified basalt;

[0158] The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener; the film-forming aid is alcohol ester dodecahydrate; and the defoamer is BYK-024 defoamer.

[0159] The preparation method of the flame-retardant and wear-resistant water-based coating in this embodiment comprises the following steps: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoaming agent, and half of the water, stirring at 550 r / min for 12 min to obtain a slurry, then adding filler and the remaining water to mix, and stirring at 900 r / min for 23 min to obtain the flame-retardant and wear-resistant water-based coating.

[0160] Test Example 3: The properties of the coatings prepared in the above-mentioned Comparative Examples 3-11 were investigated, and the test results are shown in Table 3 below:

[0161] Table 3

[0162]

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A flame retardant and wear-resistant water-based coating, characterized in that: Contains the following materials in parts by weight: 90-100 parts of modified polyurethane emulsion, 30-34 parts of filler, 0.5-1 parts of leveling agent, 1-2 parts of thickener, 1-3 parts of film-forming aid, 2.8-3.2 parts of defoamer, and 32-36 parts of water; The preparation method of the modified polyurethane emulsion comprises: heating hexamethylene diisocyanate and polypropylene glycol and mixing them for reaction, cooling them and adding 1,4-butanediol, 2,2-dihydroxymethyl propionic acid and dibutyltin dilaurate for reaction, adding amino resin for further reaction, adding triethylamine and acetone, adding ethylenediamine and deionized water under stirring, continuing stirring, and finally distilling off acetone under reduced pressure to obtain the modified polyurethane emulsion; The amino resin comprises melamine formaldehyde resin and butylated urea-formaldehyde resin in a weight ratio of (5-7): (3-5); The filler comprises modified polytetrafluoroethylene powder, modified basalt and aluminum hydroxide in a weight ratio of (10-15): (6-8): (15-19); The preparation method of the modified polytetrafluoroethylene powder comprises: stirring polytetrafluoroethylene powder and zinc methacrylate in a weight ratio of 10:(2-3) at 380-400 r / min for 5-7 minutes to obtain the modified polytetrafluoroethylene powder; The preparation method of the modified basalt comprises: using ethanol and deionized water in a volume ratio of 1:2 as solvent, preparing a 1wt% KH560 solution, adding basalt powder, ultrasonically dispersing for 30-40 minutes, centrifugally separating the solid, and drying the solid at a temperature of 100°C.

2. The flame retardant and wear-resistant water-based paint according to claim 1, characterized in that: The conditions for distilling off the acetone under reduced pressure are 50° C. and -0.08 MPa vacuum degree.

3. The flame retardant and wear-resistant water-based paint according to claim 1, characterized in that: The leveling agent is BYK-323 leveling agent; the thickener is TH-80 thickener or 481HEC thickener; the film-forming aid is alcohol ester dodecahydrate, and the defoamer is BYK-024 defoamer.

4. A method for preparing a flame retardant and wear-resistant water-based coating according to any one of claims 1 to 3, characterized in that: The steps include: weighing various required materials; mixing the weighed modified polyurethane emulsion, leveling agent, thickener, film-forming aid, defoamer and half of the water, stirring for 10-15 minutes at 500-600 r / min to obtain a slurry, then adding filler and the remaining water to mix, stirring for 20-26 minutes at 800-1000 r / min to obtain the flame-retardant and wear-resistant water-based coating.

5. A flame retardant and wear-resistant water-based paint as claimed in any one of claims 1 to 3 applied to wood, metal, craft toys, plastic, rubber, paper or glass substrates.

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