An anti-fogging glass coating for diving masks and an anti-fogging spraying process thereof

Abstract

The present application relates to a kind of anti-fogging glass coating for diving mirror and its anti-fogging spraying process, belong to functional material technical field.The present application discloses that resin and nanometer silicon dioxide are used as main anti-fogging glass coating material, to increase the adhesion of coating on glass lens with composite resin, and the poor wear resistance problem of resin is solved by silicon dioxide, the optimal combination of polyacrylic resin and polyurethane resin with mass ratio of 2:1.5 is used as composite resin, polyacrylic resin contains a large number of carboxyl groups and has super hydrophilicity, which stabilizes the silica sol system and is beneficial to the dispersion of silicon dioxide, and the adhesion of coating material is enhanced by polyurethane resin, and the wear resistance is improved by hard segment.

Description

Technical Field

[0001] This invention belongs to the field of functional materials technology and relates to an anti-fog glass coating for diving masks and its anti-fog spraying process. Background Technology

[0002] As an essential item for underwater activities, diving masks require good anti-fog properties. However, in actual use, due to the evaporation of moisture from the skin enclosed by the mask, in hot and humid environments, water vapor condenses into droplets upon contact with the relatively cool lens. When the temperature drops, these tiny droplets cool to their dew point, causing the water vapor to saturate and resulting in fogging or even frost formation inside the lens. Under these two conditions, light is refracted and scattered, altering the optical properties of the lens surface and affecting light transmission. This leads to opaque, fogged lenses, causing operational difficulties and impacting usability.

[0003] Currently, the problem of fogging is solved by modifying the surface properties of materials to create hydrophilic or hydrophobic surfaces. Hydrophilic surfaces allow water droplets to spread rapidly, forming a water film, reducing light dispersion. Furthermore, the water film has a larger radius of curvature, resulting in a faster evaporation rate. Hydrophobic surfaces allow water droplets to roll off the surface; when a certain angle is provided, the droplets can roll away, achieving a defogging effect. However, creating a small rolling angle is complex, and the material needs to be tilted for the droplets to roll away, limiting the application of hydrophobic surfaces. Therefore, hydrophilic and even superhydrophilic surfaces have received more attention and research. Summary of the Invention

[0004] This invention relates to an anti-fog glass coating for diving masks and its anti-fog spraying process, belonging to the field of functional materials technology. This invention discloses resin and nano-silica as the main anti-fog glass coating materials. The composite resin increases the adhesion of the coating to the glass lens, while silica solves the problem of poor resin abrasion resistance. The optimal combination of the composite resin is a 2:1.5 mass ratio of polyacrylic acid resin and polyurethane resin. The polyacrylic acid resin contains a large number of carboxyl groups, exhibiting superhydrophilicity and stabilizing the silica sol system, thus facilitating the dispersion of silica. The polyurethane resin enhances the adhesion of the coating material, while its hard segments provide abrasion resistance.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An anti-fog glass coating for diving masks, comprising the following raw materials in parts by weight: 100-120 parts deionized water, 2-3 parts silica sol, 200-300 parts hydrochloric acid, 5-10 parts composite resin, 0.5-1 part tetraethyl orthosilicate, and 1.5-2 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 2-3:1-2. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin.

[0007] Furthermore, the preparation method of the anti-fog glass coating for the diving mask includes the following steps:

[0008] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0009] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0010] Furthermore, in step A1, the mass fraction of hydrochloric acid is 30-35%, and the speed and time of the high-speed stirring are 3500-5000 rpm and 8-12 min, respectively.

[0011] Furthermore, the grinding speed, fineness, and time are 300-500 rpm, 50-100 μm, and 20-30 min, respectively.

[0012] Furthermore, in step A2, heating refers to heating to 50-55℃, and the heating and stirring time and speed are 5-8h and 500-1000rpm, respectively.

[0013] Furthermore, the spraying process for the anti-fog glass coating on the diving mask includes the following steps:

[0014] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0015] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0016] Furthermore, the immersion time in step (1) is 10-12 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0017] Furthermore, in step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24-30 h.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention discloses resin and nano-silica as the main anti-fog glass coating materials. The composite resin increases the adhesion of the coating to the glass lens, while the silica solves the problem of poor wear resistance of the resin. The composite resin is the optimal combination of polyacrylic acid resin and polyurethane resin with a mass ratio of 2:1.5. The polyacrylic acid resin contains a large number of carboxyl groups and has superhydrophilicity, which stabilizes the silica sol system and facilitates the dispersion of silica. The polyurethane resin enhances the adhesion of the coating material, and its hard segments improve wear resistance. In addition, the grinding step of the three-roll mill prevents the agglomeration of silica. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with embodiments, is provided below.

[0021] The silica sol involved in this invention was purchased from Jinan Huamao Chemical Co., Ltd.; sodium alkenyl sulfonate was purchased from Jinan Baoliyuan Chemical Co., Ltd., CAS No. 68439-57-6; the polyacrylic resin was water-based polyacrylic resin, purchased from Guangdong Yuanfeng Chemical Reagent Co., Ltd., CAS No. NA; and the polyurethane resin was water-based ink polyurethane resin, purchased from Wenzhou Guoshibang Polymer Materials Co., Ltd., CAS No. 9009-54-5.

[0022] Example 1

[0023] An anti-fog glass coating for diving masks, comprising the following raw materials in parts by weight: 100 parts deionized water, 2 parts silica sol, 200 parts hydrochloric acid, 5 parts composite resin, 0.5 parts tetraethyl orthosilicate, and 1.5 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 2:1. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin.

[0024] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0025] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0026] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0027] In step A1, the hydrochloric acid has a mass fraction of 30%, and the high-speed stirring speed and time are 3500 rpm and 8 min, respectively.

[0028] The grinding speed, fineness, and time were 300 rpm, 50 μm, and 20 min, respectively.

[0029] In step A2, heating refers to raising the temperature to 50°C, and the heating and stirring time and speed are 5 hours and 500 rpm, respectively.

[0030] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0031] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0032] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0033] The immersion time in step (1) is 10 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0034] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24 h.

[0035] Example 2

[0036] An anti-fog glass coating for diving masks, comprising the following raw materials in parts by weight: 110 parts deionized water, 2.5 parts silica sol, 250 parts hydrochloric acid, 8 parts composite resin, 0.8 parts tetraethyl orthosilicate, and 1.8 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 2:1.5. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin.

[0037] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0038] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0039] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0040] In step A1, the hydrochloric acid has a mass fraction of 30%, and the high-speed stirring speed and time are 3500 rpm and 8 min, respectively.

[0041] The grinding speed, fineness, and time were 300 rpm, 50 μm, and 20 min, respectively.

[0042] In step A2, heating refers to raising the temperature to 50°C, and the heating and stirring time and speed are 5 hours and 500 rpm, respectively.

[0043] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0044] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0045] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0046] The immersion time in step (1) is 10 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0047] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24 h.

[0048] Example 3

[0049] An anti-fog glass coating for diving masks, comprising the following raw materials in parts by weight: 120 parts deionized water, 3 parts silica sol, 300 parts hydrochloric acid, 10 parts composite resin, 1 part tetraethyl orthosilicate, and 2 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 3:2. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin.

[0050] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0051] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0052] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0053] In step A1, the hydrochloric acid has a mass fraction of 35%, and the high-speed stirring speed and time are 5000 rpm and 12 min, respectively.

[0054] The grinding speed, fineness, and time were 500 rpm, 100 μm, and 30 min, respectively.

[0055] In step A2, heating refers to raising the temperature to 55°C, and the stirring time and speed during the heating process are 8 hours and 1000 rpm, respectively.

[0056] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0057] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0058] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0059] The immersion time in step (1) is 12 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0060] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 30 h.

[0061] Comparative Example 1

[0062] Based on Example 2, an anti-fog glass coating for diving masks is provided, comprising the following raw materials in parts by weight: 110 parts deionized water, 2.5 parts silica sol, 250 parts hydrochloric acid, 8 parts water-based ink polyurethane resin, 0.8 parts tetraethyl orthosilicate, and 1.8 parts sodium alkenyl sulfonate.

[0063] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0064] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0065] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0066] In step A1, the hydrochloric acid has a mass fraction of 30%, and the high-speed stirring speed and time are 3500 rpm and 8 min, respectively.

[0067] The grinding speed, fineness, and time were 300 rpm, 50 μm, and 20 min, respectively.

[0068] In step A2, heating refers to raising the temperature to 50°C, and the heating and stirring time and speed are 5 hours and 500 rpm, respectively.

[0069] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0070] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0071] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0072] The immersion time in step (1) is 10 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0073] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24 h.

[0074] Comparative Example 2

[0075] Based on Example 2, an anti-fog glass coating for diving masks is provided, comprising the following raw materials in parts by weight: 110 parts deionized water, 2.5 parts silica sol, 250 parts hydrochloric acid, 8 parts water-based polyacrylic acid resin, 0.8 parts tetraethyl orthosilicate, and 1.8 parts sodium alkenyl sulfonate.

[0076] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0077] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding;

[0078] A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain the anti-fog glass coating for diving goggles.

[0079] In step A1, the hydrochloric acid has a mass fraction of 30%, and the high-speed stirring speed and time are 3500 rpm and 8 min, respectively.

[0080] The grinding speed, fineness, and time were 300 rpm, 50 μm, and 20 min, respectively.

[0081] In step A2, heating refers to raising the temperature to 50°C, and the heating and stirring time and speed are 5 hours and 500 rpm, respectively.

[0082] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0083] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0084] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

[0085] The immersion time in step (1) is 10 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0086] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24 h.

[0087] Comparative Example 3

[0088] Based on Example 2, an anti-fog glass coating for diving masks is provided. The anti-fog glass coating for diving masks comprises the following raw materials in parts by weight: 110 parts deionized water, 2.5 parts silica sol, 250 parts hydrochloric acid, 8 parts composite resin, 0.8 parts tetraethyl orthosilicate, and 1.8 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 2:1.5. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin.

[0089] The preparation method of the anti-fog glass coating for diving masks includes the following steps:

[0090] A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed;

[0091] A2: Then add tetraethyl orthosilicate and heat and stir, and finally add sodium alkenyl sulfonate and stir to make anti-fog glass coating for diving goggles.

[0092] In step A1, the hydrochloric acid has a mass fraction of 30%, and the high-speed stirring speed and time are 3500 rpm and 8 min, respectively.

[0093] In step A2, heating refers to raising the temperature to 50°C, and the heating and stirring time and speed are 5 hours and 500 rpm, respectively.

[0094] The spraying process for the anti-fog glass coating for the diving mask includes the following steps:

[0095] (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use;

[0096] (2) Use an airbrush to spray paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask lens after curing at room temperature.

[0097] The immersion time in step (1) is 10 hours, and the piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

[0098] In step (2), the diameter of the spray gun is 0.3 mm, the volume content of the spray is 3 mL, and the curing time is 24 h.

[0099] Performance testing

[0100] Transmittance test: The transmittance was measured using a spectrophotometer and calculated according to GB11186.3-1989 standard;

[0101] Anti-fog test: Refer to GB / T31726-2015, place the lens 20±5mm above 85℃ hot water and observe the fogging of the lens;

[0102] Contact angle test: Tested according to GB / T 30447-2013 standard;

[0103] Friction performance test: Wet the lint-free cloth, with a weight of 500g, at a speed of 30mm / s, one reciprocating motion is counted as one wiping cycle. After 2000 wiping cycles, test whether fogging occurs.

[0104] Alcohol resistance test: Apply alcohol to a lint-free cloth, weigh 500g, move at 30mm / s, repeat once, wipe 1000 times, then test for fogging.

[0105] QUV resistance test: Refer to GB / T23987-2009, UVA-340 mercury lamp, irradiance 45W / m 2 Test whether fogging occurs after 240 hours;

[0106] High humidity test: Refer to GB / T31726-2015, place the lens 20±5mm above 85℃ hot water, place it under 85%RH conditions, and observe the fogging of the lens;

[0107] The anti-fog diving mask lenses prepared in Examples 1-3 and Comparative Examples 1-3 were tested for light transmittance, anti-fog properties, contact angle, friction performance, alcohol resistance, QUV resistance, and high temperature and humidity resistance using the methods described above. The results are shown in Table 1.

[0108] Table 1 Test Results

[0109]

[0110] Analysis of Table 1 shows that Comparative Examples 1 and 3 have lower light transmittance than other samples. The resin in Comparative Example 1 is polyurethane resin, which has weaker hydrophilicity than polyacrylic acid resin and more significant compatibility with silica sol, resulting in uneven dispersion of silica and thus lower light transmittance. Comparative Example 3, lacking grinding in a three-roll mill, had unstable silica formed from the silica sol, which was not refined and dispersed, further reducing light transmittance. The contact angles of Comparative Examples 1 and 3 are larger than other samples, indicating relatively lower hydrophilicity in them. Comparative Example 1 showed decreased hydrophilicity due to the absence of added polyacrylic acid resin, while Comparative Example 3 showed hydrophilicity due to uneven dispersion of silica. Therefore, Comparative Example 1 exhibited fogging in the anti-fog test. No fogging occurred in Examples 1-3 due to rubbing with a lint-free cloth or an alcohol-based lint-free cloth, while Comparative Examples 1-3 all showed fogging. This indicates that the polyurethane resin and the three-roll mill grinding process significantly affect the abrasion resistance of the coating. The QUV and high-humidity conditions showed no difference from the actual state, and neither affected the sample.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An anti-fog glass coating for diving masks, characterized in that, The anti-fog glass coating for diving masks comprises the following raw materials in parts by weight: 100-120 parts deionized water, 2-3 parts silica sol, 200-300 parts hydrochloric acid, 5-10 parts composite resin, 0.5-1 parts tetraethyl orthosilicate, and 1.5-2 parts sodium alkenyl sulfonate. The composite resin is composed of polyacrylic acid resin and polyurethane resin in a mass ratio of 2-3:1-2. The polyacrylic acid resin is a water-based polyacrylic acid resin, and the polyurethane resin is a water-based ink polyurethane resin. The preparation method of the anti-fog glass coating for diving masks includes the following steps: A1: Add silica sol and hydrochloric acid to deionized water, stir at room temperature, add composite resin and stir at high speed, then put it into a three-roll mill for grinding; A2: After discharge, add tetraethyl orthosilicate and heat and stir. Finally, add sodium alkenyl sulfonate and stir to obtain anti-fog glass coating for diving goggles. The grinding speed, fineness, and time are 300-500 rpm, 50-100 μm, and 20-30 min, respectively; In step A1, the mass fraction of hydrochloric acid is 30-35%, and the speed and time of the high-speed stirring are 3500-5000 rpm and 8-12 min, respectively.

2. The anti-fog glass coating for diving masks according to claim 1, characterized in that, In step A2, heating refers to raising the temperature to 50-55℃, and the stirring time and speed during the heating process are 5-8 hours and 500-1000 rpm, respectively.

3. The spraying process for an anti-fog glass coating for diving masks according to claim 1, characterized in that, Includes the following steps: (1) Immerse the glass lens of the diving mask in the piranha solution, remove it, clean it with ultrasonication and dry it with nitrogen gas for later use; (2) Use an airbrush to spray the paint onto the glass lens of the diving mask, and obtain an anti-fog diving mask after curing at room temperature.

4. The spraying process for an anti-fog glass coating for diving masks according to claim 3, characterized in that, The immersion time in step (1) is 10-12 hours. The piranha solution is a mixture of concentrated sulfuric acid in a 7:3 ratio and hydrogen peroxide with a mass fraction of 30%.

5. The spraying process for an anti-fog glass coating for diving masks according to claim 3, characterized in that, In step (2), the diameter of the spray gun is 0.3 mm, and the curing time is 24-30 h.

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