Easy-to-clean micron coating as well as preparation method and application thereof

Abstract

The invention provides an easy-to-clean micron coating as well as a preparation method and application thereof. The easy-to-clean micron coating comprises the following preparation raw materials in parts by weight: 9-13 parts of a hydrophobic silicon dioxide transparent solution; 0.4 to 0.8 part of organic fluorine modified hydroxy acrylic resin; the high-temperature-resistant silicone rubber is prepared from the following components in parts by weight: 12 to 22 parts of decamethylcyclopentasiloxane, 3.6 to 5.8 parts of perfluorodecyl triethoxysilane, 3 to 5 parts of fumed silica, 0.4 to 2.16 parts of hydrogen-containing silicone oil, 2.4 to 3.6 parts of methyltrimethoxysilane, 0.6 to 2.2 parts of polytetrafluoroethylene, 0.5 to 3 parts of a catalyst, 0.5 to 2.16 parts of a dehydrating agent and 0.54 to 2.4 parts of a de-foaming agent. A coating formed by the easy-to-clean micron coating is high in hardness, resistant to scratch, strong in adhesive force, good in weather resistance, strong in acid and alkali resistance, waterproof, oil-proof, anti-sticking, anti-doodling and long in service life, and can be applied to a base material of a water injection type foot massager.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to an easy-to-clean micron coating, a preparation method and application thereof. Background Art

[0002] The foot is the farthest part of the human body from the heart. In winter, due to the stimulation of cold, the blood vessels in the foot contract, blood circulation is impaired, and it is easy to induce a variety of diseases. Soaking feet in hot water is foot bathing, which is one of the contents of traditional Chinese medicine foot therapy and is also a commonly used external treatment method. Foot bath barrels, as a leisure and relaxing foot bathing device in modern life, are also increasingly entering people's lives.

[0003] When washing their feet, users will add foot bath liquid, foot bath salt, foot bath medicine bags, and aging foot skin to the water. After soaking their feet, there will be a lot of dirt left on the inner wall and bottom of the water-filled foot massager, which is difficult to clean. If it is not cleaned for a long time, the water-filled foot massager will produce a strong odor, affecting the user experience and thus affecting sales. Summary of the invention

[0004] The purpose of the present invention is to provide an easy-to-clean micron coating, its preparation method and application. The easy-to-clean micron coating in the present invention has good adhesion when coated on the surface of a footbath, is easy to clean, and can withstand the high temperature, acid, alkali, friction and other working environments of the footbath.

[0005] The present invention provides an easy-to-clean micron coating, comprising the following raw materials in parts by weight:

[0006] Hydrophobic silica transparent solution: 9-13 parts by weight, organic fluorine-modified hydroxy acrylic resin: 0.4-0.8 parts by weight, decamethylcyclopentasiloxane: 12-22 parts by weight, perfluorodecyltriethoxysilane: 3.6-5.8 parts by weight, fumed silica: 3-5 parts by weight, hydrogenated silicone oil: 0.4-2.16 parts by weight, methyltrimethoxysilane: 2.4-3.6 parts by weight, polytetrafluoroethylene 0.6-2.2 parts by weight, catalyst: 0.5-3 parts by weight, dehydrating agent: 0.5-2.16 parts by weight, defoaming agent: 0.54-2.4 parts by weight.

[0007] Preferably, the particle size of the fumed silica is 5 to 10 nm.

[0008] Preferably, the catalyst includes one or more of manganese dioxide, sulfuric acid, iron powder, aluminum oxide and hydrochloric acid.

[0009] Preferably, the defoaming agent comprises one or more of fatty amines, paraffin, fatty alcohols, fatty acid esters and hexylene glycol;

[0010] The dehydrating agent includes one or more of ethanol, glycerol and acetone.

[0011] The present invention provides a method for preparing the easy-to-clean micron coating as described above, comprising the following steps:

[0012] A) The hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyl triethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin are shear-dispersed in a high-speed shear dispersant at a speed of 18000-20000 r / min.

[0013] B) adding a catalyst and a portion of a defoaming agent to the sheared and dispersed product of step A) and stirring to react, heating and stirring to react for 16 to 18 hours;

[0014] C) adding a portion of a dehydrating agent to the catalytic reaction product of step B) to carry out a dehydration reaction;

[0015] D) adding methyltrimethoxysilane, remaining defoamer and polytetrafluoroethylene to the dehydration reaction product of step C), and performing ball milling, high-speed shearing and vacuum reflux;

[0016] E) After adding the remaining dehydrating agent to the reaction product in step (D), react at a low speed for 4 to 12 hours, and then continue stirring for 3 to 4 hours to obtain a clean micron coating.

[0017] Preferably, the reaction temperature in step B) is 60-80° C., and the reaction time is 16-18 hours.

[0018] Preferably, the reaction temperature of the dehydration reaction in step C) is 60-100° C.; and the dehydration reaction time is 0.6-5 hours.

[0019] Preferably, the temperature of the slow reaction in step E) is 20-30°C.

[0020] Preferably, the portion of the defoaming agent in step B) is 0.2 to 1.2 parts, and the remaining defoaming agent in step D) is 0.2 to 1.2 parts;

[0021] The partial dehydrating agent in step C) is 0.2-0.5 parts, and the remaining dehydrating agent in step E) is 1.5-2.0 parts.

[0022] The present invention provides a footbath bucket, the inner surface of which is composited with a coating;

[0023] The coating is prepared from the easy-to-clean micron coating described above.

[0024] The invention provides an easy-to-clean micron coating, which comprises the following raw materials in parts by weight: 9-13 parts by weight of a hydrophobic silicon dioxide transparent solution; 0.4-0.8 parts by weight of an organic fluorine-modified hydroxy acrylic resin; 12-22 parts by weight of decamethylcyclopentasiloxane; 3.6-5.8 parts by weight of perfluorodecyltriethoxysilane; 3-5 parts by weight of fumed silicon dioxide; 0.4-2.16 parts by weight of hydrogenated silicone oil; 2.4-3.6 parts by weight of methyltrimethoxysilane; 0.6-2.2 parts by weight of polytetrafluoroethylene; 0.5-3 parts by weight of a catalyst; 0.5-2.16 parts by weight of a dehydrating agent; and 0.54-2.4 parts by weight of a defoaming agent. The coating formed by the easy-to-clean micron coating in the present invention has high hardness, scratch resistance, strong adhesion, a lifespan of 500 hours when working for a long time at a water temperature of 42-45°C, good weather resistance, strong acid and alkali resistance, waterproof and oil-proof, anti-sticking and anti-graffiti, and can be applied to the substrate of a water-injection foot massager, making it convenient for users to clean the water-injection foot massager, thus changing the user experience that the water-injection foot massager was difficult to clean in the past. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 This is a picture of the tested coating in Comparative Example 1 of the present invention;

[0027] Figure 2 This is a picture of the tested coating in Comparative Example 2 of the present invention;

[0028] Figure 3 This is a picture of the tested coating in Comparative Example 3 of the present invention;

[0029] Figure 4 This is a picture of the tested coating in Example 1 of the present invention. DETAILED DESCRIPTION

[0030] The present invention provides an easy-to-clean micron coating, comprising the following raw materials in parts by weight:

[0031] Hydrophobic silica transparent solution: 9-13 parts by weight; organic fluorine-modified hydroxy acrylic resin: 0.4-0.8 parts by weight; decamethylcyclopentasiloxane: 12-22 parts by weight, perfluorodecyltriethoxysilane: 3.6-5.8 parts by weight, fumed silica: 3-5 parts by weight, hydrogenated silicone oil: 0.4-2.16 parts by weight, methyltrimethoxysilane: 2.4-3.6 parts by weight, polytetrafluoroethylene 0.6-2.2 parts by weight, catalyst: 0.5-3 parts by weight, dehydrating agent: 0.5-2.16 parts by weight, defoaming agent: 0.54-2.4 parts by weight.

[0032] In the present invention, the hydrophobic silica transparent solution comprises hydrophobic silica and a solvent, and the solvent preferably comprises chlorosilane or hexamethyldisilazane; the mass concentration of the hydrophobic silica transparent solution is preferably 3-8 mol / L, more preferably 5 mol / L; the mass fraction of the hydrophobic silica transparent solution is preferably 9-13 parts, more preferably 10-12 parts, such as 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, preferably with any of the above values ​​as the upper or lower limit of the range value.

[0033] In the present invention, the weight proportion of the organic fluorine-modified hydroxy acrylic resin is preferably 0.4 to 0.8 parts, more preferably 0.5 to 0.7 parts, such as 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, preferably with any of the above values ​​as the upper or lower limit of the range value.

[0034] In the present invention, the weight proportion of the decamethylcyclopentasiloxane is preferably 12 to 22 parts, more preferably 15 to 20 parts, such as 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, preferably with any of the above values ​​as the upper or lower limit of the range value.

[0035] In the present invention, the weight parts of the perfluorodecyltriethoxysilane are preferably 3.6 to 5.8 parts, more preferably 3.36 to 4.5 parts, such as 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4.0 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 5 parts, 5.1 parts, 5.2 parts, 5.3 parts, 5.4 parts, 5.5 parts, 5.6 parts, 5.7 parts, 5.76 parts, 5.8 parts, preferably a range value with the above arbitrary numerical values ​​as the upper or lower limit.

[0036] In the present invention, the fumed silica has thickening, matting, UV resistance and bactericidal effects. After being added, it helps to increase the viscosity of the paint and has a bactericidal effect when used in a foot bath tub; the particle size of the fumed silica is preferably 5-10 nm, more preferably 7 nm.

[0037] In the present invention, the weight proportion of the hydrogen-containing silicone oil is preferably 0.4 to 2.16 parts, more preferably 1 to 1.5 parts, such as 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0038] In the present invention, the weight proportion of the methyltrimethoxysilane is preferably 2.4 to 3.6 parts, more preferably 3.1 to 3.6 parts, such as 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3.0 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0039] In the present invention, the polytetrafluoroethylene is used as a non-stick additive, and the weight proportion is preferably 0.6 to 2.2 parts, more preferably 2.0 to 2.2 parts, such as 0.6 parts, 1 parts, 1.5 parts, 2 parts, 2.1 parts, 2.2 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0040] In the present invention, the catalyst preferably includes one or more of manganese dioxide, sulfuric acid, iron powder, aluminum oxide and hydrochloric acid, and the weight proportion of the catalyst is preferably 0.5 to 3 parts, more preferably 2.5 to 3 parts, such as 0.5 parts, 0.9 parts, 1 part 1.5 parts, 2 parts, 2.5 parts, 3 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0041] In the present invention, the dehydrating agent preferably includes one or more of ethanol, glycerol and acetone, and the weight proportion of the dehydrating agent is preferably 0.5 to 2.16 parts, more preferably 2 to 2.2 parts, such as 0.5 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.16 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0042] In the present invention, the defoaming agent preferably includes one or more of fatty amines, paraffin, fatty alcohols, fatty acid esters and hexylene glycol, and the weight proportion of the defoaming agent is preferably 0.54 to 2.4 parts, more preferably 2.0 to 2.4 parts, such as 0.54 parts, 1 part, 1.0 parts, 1.5 parts, 2.0 parts, 2.2 parts, and 2.4 parts are preferably range values ​​with any of the above values ​​as the upper or lower limit.

[0043] The present invention also provides a method for preparing the easy-to-clean micron coating as described above, comprising the following steps:

[0044] A) a hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyl triethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin are shear-dispersed in a high-speed shear dispersant at a speed of 18000-20000 r / min;

[0045] B) adding a catalyst and a portion of a defoamer to the sheared and dispersed product of step A) and stirring for 16 to 18 hours to react;

[0046] C) adding a portion of a dehydrating agent to the catalytic reaction product of step B) to carry out a dehydration reaction;

[0047] F) adding methyltrimethoxysilane, remaining defoamer and polytetrafluoroethylene to the dehydration reaction product of step C), and performing ball milling, high-speed shearing and vacuum reflux;

[0048] G) After adding the remaining dehydrating agent to the reaction product in step (D), react at a low speed for 4 to 12 hours, and then continue stirring for 3 to 4 hours to obtain a clean micron coating.

[0049] In the present invention, the hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyltriethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin are preferably firstly sheared and dispersed in a high-speed shear dispersant.

[0050] In the present invention, the components and amounts of the hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyltriethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin are consistent with the components and amounts of the hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyltriethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin described above, and the present invention will not be repeated here.

[0051] In the present invention, perfluorodecyltriethoxysilane wraps the fumed silica particles. Under the modification of the silane coupling agent, the fumed silica forms a cross-linked semi-inorganic polymer with Si-O-Si as the main chain and organic groups connected to the silicon atoms. The silicon atoms have low electronegativity, and the Si-O bonds have certain ionicity. The Si-O-Si bond energy and bond angle are both larger than those of the CC bond. The Si-O-Si bond is resistant to high temperatures, has a large contact angle, can be decontaminated, and has oxidation resistance, acid and alkali resistance, and has hydrophobic and oleophobic properties, so that the coating achieves good self-cleaning properties.

[0052] In the present invention, the rotation speed of the shear dispersion is preferably 18000-20000 r / min, more preferably 19000-20000 r / min; the reaction temperature is preferably 60-80°C, more preferably 80°C.

[0053] Then, a catalyst is added to the above reaction product and the reaction is carried out for 16 to 18 hours, and then part of the defoamer is added to react. In this step, the hydrogen-containing silicone oil in the mixture undergoes chemical adsorption under the catalysis of the catalyst, and a hydrogen atom in the water molecule is extracted by the catalyst to produce hydrogen. At the same time, the si-H bond in the silicone oil molecule reacts chemically with the oxygen atom in the water molecule to form a silicon-hydrogen bond and a silicon-oxygen bond. The formation of this bond position makes the polymer have excellent thermal oxidation stability, gas permeability, water resistance, etc., and increases the adhesion of the coating.

[0054] In the present invention, the type and amount of the catalyst are consistent with the type and amount of the catalyst described above, and the present invention will not be repeated here. The type of the partial defoamer is consistent with the type of the defoamer described above, and the weight proportion of the partial defoamer is preferably 0.2 to 1.2 parts, more preferably 0.5 to 1.2 parts, such as 0.2 parts, 0.27 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0055] In the present invention, the reaction temperature after adding the catalyst and part of the defoaming agent is preferably 60-80°C, more preferably 65-75°C, such as 60°C, 65°C, 70°C, 75°C, 80°C, preferably a range value with any of the above values ​​as the upper or lower limit; the reaction time is preferably 16-18 hours, more preferably 18 hours.

[0056] After the above catalytic reaction is completed, the present invention adds part of the dehydrating agent to carry out a dehydration reaction.

[0057] In the present invention, the type of the dehydrating agent is consistent with the type of the dehydrating agent described above, and the present invention will not be repeated here. The weight portion of the partial dehydrating agent is preferably 0.2~0.5 parts, more preferably 0.3~0.4 parts, such as 0.2 parts, 0.3 parts, 0.36 parts, 0.4 parts, 0.5 parts, preferably a range value with any of the above values ​​as the upper or lower limit; the reaction temperature after adding the dehydrating agent is preferably 60~100°C, more preferably 80~90°C, such as 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, preferably a range value with any of the above values ​​as the upper or lower limit; the dehydration reaction time is preferably 0.6~5 hours, more preferably 4 hours.

[0058] Then, methyltrimethoxysilane, the remaining defoamer and polytetrafluoroethylene are added to carry out ball milling reaction, and high-speed shearing is performed again, and reflux is carried out in a vacuum reflux equipment.

[0059] In the present invention, the type and amount of the methyltrimethoxysilane and polytetrafluoroethylene are consistent with the type and amount of the methyltrimethoxysilane and polytetrafluoroethylene described above, and the present invention will not be repeated here; the type of the remaining defoamer is consistent with the type of the defoamer described above, and the present invention will not be repeated here, and the weight portion of the remaining defoamer is preferably 0.2 to 1.2 parts, more preferably 0.5 to 1.2 parts, such as 0.2 parts, 0.27 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0060] In the present invention, the temperature of the vacuum reflux is controlled at 100-120°C, preferably 115°C; the time of the vacuum reflux is controlled at 35 minutes; the function is to improve the anti-stickiness and hydrophobicity. The mixer is stirred at a low speed of 1200 revolutions for 8 hours. The scratch resistance of the optical plastic surface is improved, the transparency and light transmittance are high, and the hardness of the pencil can reach 6H-7H. At the same time, the coating can be resistant to high and low temperatures.

[0061] The present invention adds the remaining dehydrating agent to the organosilicon siloxane polymer obtained by vacuum reflux, reacts at a low speed for 12 hours, and then continues to stir to obtain a clean micron coating. The organosilicon siloxane polymer is a polymer composed of silicon and oxygen atoms arranged alternately, and has low surface tension, good heat resistance, excellent electrical insulation and chemical stability.

[0062] In the present invention, the type of the remaining dehydrating agent is consistent with the type of the dehydrating agent described above, and the present invention will not repeat them here. The mass fraction of the remaining dehydrating agent is preferably 1.5 to 2.0 parts, and more preferably 1.6 to 1.8 parts, such as 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, preferably a range value with any of the above values ​​as the upper or lower limit.

[0063] In the present invention, the time of the slow reaction after adding the dehydrating agent is preferably 4 to 12 hours, more preferably 9 to 12 hours, such as 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours; the temperature of the slow reaction is preferably room temperature, such as 20 to 30 ° C.

[0064] After the reaction is completed, the reaction product is placed at room temperature and stirred for 4 hours at room temperature to obtain an easy-to-clean micron coating.

[0065] The present invention also provides a foot bath tub, the inner wall of which is composited with a coating formed by the easy-to-clean micron coating described above. The easy-to-clean micron coating is sprayed on the surface of the substrate of the water-injection foot massager and can react with moisture in the air to naturally solidify to form a film layer.

[0066] The organic silicon siloxane polymer in the coating formed by the easy-to-clean micron coating of the present invention plays a role in viscosity enhancement, and the condensation reaction of Si-OH and Si-OR in the siloxane forms a modified composite coating, and then a wear-resistant coating is obtained and can be covered on the substrate to form an easy-to-clean micron coating mixture with a thickness of 0.5-0.8 μm. It has the film-forming property of organic resin, increases the adhesion of the micron coating on the substrate, and has high transparency, high hardness, and flame retardancy.

[0067] In the present invention, the foot bath bucket can be a water-filled foot bath bucket. In one application scenario of the present invention, users use saffron, prickly ash, Chinese medicine foot bath bag, foot bath salt, foot bath essential oil, etc. according to their own physical needs. These substances are attached to the inner wall substrate of the barrel of the water-filled foot massager to varying degrees, some of which are acidic, some are alkaline, and some are oily. For example, after saffron is attached to the inner wall of the existing uncoated barrel, it is relatively stable and difficult to clean. The coating formed by the easy-to-clean micron coating in the present invention has strong hydrophobic and oleophobic properties, acid and alkali resistance, and can maintain easy-to-clean performance in bath lotions of various properties.

[0068] In another application scenario of the present invention, since users use a water-filled foot bath tub, human nails, foot-rubbing cloths, foot-rubbing stones, etc. can easily scratch the inner wall of the tub. The coating formed by the easy-to-clean micron coating in the present invention has high hardness and scratch resistance, and can increase the service life of the coating.

[0069] In another application scenario of the present invention, some users may pour freshly boiled 100°C water into a water-filled foot massager, and then add cold water to make the water temperature suitable at around 42°C. The coating formed by the easy-to-clean micron coating in the present invention has the performance of being resistant to high temperature and the impact of hot and cold water shocks, and has a lifespan of 500 hours of long-term work at a water temperature of 42-45°C.

[0070] In another application scenario of the present invention, considering the transportation scenario of a water-injected foot massager, the required transportation temperature for the product in winter is -10°C. The coating formed by the easy-to-clean micron coating in the present invention has the characteristic of being resistant to low temperatures and can meet the low temperature requirements of winter transportation.

[0071] The invention provides an easy-to-clean micron coating, which comprises the following raw materials in parts by weight: 9-13 parts by weight of a hydrophobic silicon dioxide transparent solution; 0.4-0.8 parts by weight of an organic fluorine-modified hydroxy acrylic resin; 12-22 parts by weight of decamethylcyclopentasiloxane; 3.6-5.8 parts by weight of perfluorodecyltriethoxysilane; 3-5 parts by weight of fumed silicon dioxide; 0.4-2.16 parts by weight of hydrogenated silicone oil; 2.4-3.6 parts by weight of methyltrimethoxysilane; 0.6-2.2 parts by weight of polytetrafluoroethylene; 0.5-3 parts by weight of a catalyst; 0.5-2.16 parts by weight of a dehydrating agent; and 0.54-2.4 parts by weight of a defoaming agent.

[0072] The coating formed by the easy-to-clean micron coating in the present invention has high hardness, scratch resistance, strong adhesion, a lifespan of 500 hours of long-term working at a water temperature of 42-45°C, good weather resistance, strong acid and alkali resistance, waterproof and oil-proof, anti-sticking and anti-graffiti, and can be applied to the substrate of a water-injection foot massager, making it convenient for users to clean the water-injection foot massager, changing the user experience that the water-injection foot massager was difficult to clean in the past.

[0073] In order to further illustrate the present invention, an easy-to-clean micron coating, a preparation method and an application thereof provided by the present invention are described in detail below in conjunction with embodiments, but it should not be construed as limiting the scope of protection of the present invention.

[0074] Example 1

[0075] 1) Add 13 parts of hydrophobic silica transparent solution, 22 parts of decamethylcyclopentasiloxane, 4.2 parts of perfluorodecyltriethoxysilane, 5 parts of fumed silica, 2.16 parts of hydrogenated silicone oil, and 0.8 parts of organic fluorine-modified hydroxy acrylic resin into a 4000ml round-bottom flask; use a high-speed shear disperser (speed 20000r / min) for shear dispersion.

[0076] 2) Add 1.2 parts of catalyst and 1.2 parts of defoamer and heat to 80°C, heat and stir to react for 18 hours;

[0077] 3) Add 0.36 parts of dehydrating agent (ethanol and glycerol) and keep the temperature at 100℃ for 5 hours.

[0078] 4) Then add 2.4 parts of methyltrimethoxysilane to dilute the inorganic silicone resin, 1.2 parts of defoamer, and 2.2 parts of polytetrafluoroethylene, and perform ball milling again, high-speed shearing, and vacuum reflux;

[0079] 5) 1.8 parts of a dehydrating agent was added to react at a low speed for 12 hours, and stirring was continued at room temperature for 4 hours to obtain an easy-to-clean micron coating mixture, which was then sprayed on the inner wall of a water-filled foot bath.

[0080] Comparative Example 1

[0081] The coating was prepared according to the method in Example 1 and sprayed on the inner wall of the water-filled foot bath tub, except that Comparative Example 1 used 8 parts of a hydrophobic silica transparent solution and 2 parts of fumed silica.

[0082] Comparative Example 2

[0083] The coating was prepared according to the method in Example 1 and sprayed on the inner wall of the water-filled foot bath tub, except that 0.18 parts of defoaming agent were added in step 2) and 0.24 parts of defoaming agent were added in step 4) in Comparative Example 2.

[0084] Comparative Example 3

[0085] The coating was prepared according to the method in Comparative Example 2 and sprayed on the inner wall of the water-filled foot bath tub. The difference was that 0.3 parts of hydrogen-containing silicone oil was added in step 1) of Comparative Example 3.

[0086] The coatings obtained in Example 1 and Comparative Examples 1-3 were tested for performance, and the results are shown in Table 1.

[0087] Table 1 Performance test data of coatings in Examples 1 to 4

[0088]

[0089] According to the data in Table 1, the coating in Example 1 of the present invention has stable adhesion performance, strong easy-to-clean ability, good oleophobic and anti-fouling effect, and is resistant to acidity, alkalinity, and oiliness such as foot bath salts, foot bath bags, and foot bath essential oil bags; it has strong staining resistance, high temperature resistance, and low temperature resistance. This product is attached to the inner wall of a water-filled foot bath bucket, which is relatively safe for users to use and can be applied to products. The silicon dioxide content in Comparative Example 1 is low, resulting in poor hanging stability of silicon bonds, poor adhesion, and poor viscosity; the defoamer content in Comparative Example 2 is low, resulting in bubbles, and the hydrogen-containing silicone oil and defoamer content in Comparative Example 3 are sprayed on the barrel wall with uneven thickness. Thick places are prone to small bubbles.

[0090] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An easy-to-clean micron coating, comprising the following raw materials in parts by weight: Hydrophobic silica transparent solution: 9-13 parts by weight, organic fluorine-modified hydroxy acrylic resin: 0.4-0.8 parts by weight, decamethylcyclopentasiloxane: 12-22 parts by weight, perfluorodecyltriethoxysilane: 3.6-5.8 parts by weight, fumed silica: 3-5 parts by weight, hydrogenated silicone oil: 0.4-2.16 parts by weight, methyltrimethoxysilane: 2.4-3.6 parts by weight, polytetrafluoroethylene 0.6-2.2 parts by weight, catalyst: 0.5-3 parts by weight, dehydrating agent: 0.5-2.16 parts by weight, defoaming agent: 0.54-2.4 parts by weight.

2. The easy-to-clean micron coating according to claim 1, characterized in that: The particle size of the fumed silica is 5-10 nm.

3. The easy-to-clean micron coating according to claim 1, characterized in that: The catalyst comprises one or more of manganese dioxide, sulfuric acid, iron powder, aluminum oxide and hydrochloric acid.

4. The easy-to-clean micron coating according to claim 1, characterized in that: The defoaming agent includes one or more of fatty amines, paraffin, fatty alcohols, fatty acid esters and hexylene glycol; The dehydrating agent includes one or more of ethanol, glycerol and acetone.

5. The method for preparing the easy-to-clean micron coating according to claim 1, comprising the following steps: A) The hydrophobic silica transparent solution, decamethylcyclopentasiloxane, perfluorodecyl triethoxysilane, fumed silica, hydrogenated silicone oil, and organic fluorine-modified hydroxy acrylic resin are shear-dispersed in a high-speed shear dispersant at a speed of 18000-20000 r / min. B) adding a catalyst and a portion of a defoamer to the sheared and dispersed product of step A) and stirring to react, heating and stirring to react for 16 to 18 hours; C) adding a portion of a dehydrating agent to the catalytic reaction product of step B) to carry out a dehydration reaction; D) adding methyltrimethoxysilane, remaining defoamer and polytetrafluoroethylene to the dehydration reaction product of step C), and performing ball milling, high-speed shearing and vacuum reflux; E) After adding the remaining dehydrating agent to the reaction product in step (D), react at a low speed for 4 to 12 hours, and then continue stirring for 3 to 4 hours to obtain a clean micron coating.

6. The preparation method according to claim 5, characterized in that: The reaction temperature in step B) is 60-80° C. and the reaction time is 16-18 hours.

7. The preparation method according to claim 5, characterized in that: The reaction temperature of the dehydration reaction in step C) is 60-100° C.; the dehydration reaction time is 0.6-5 hours.

8. The preparation method according to claim 5, characterized in that: The temperature of the slow reaction in step E) is 20-30°C.

9. The preparation method according to claim 5, characterized in that: The portion of the defoamer in step B) is 0.2 to 1.2 parts, and the remaining defoamer in step D) is 0.2 to 1.2 parts; The partial dehydrating agent in step C) is 0.2-0.5 parts, and the remaining dehydrating agent in step E) is 1.5-2.0 parts.

10. A foot bath, characterized in that: The inner surface of the foot bath tub is compositely coated; The coating is prepared by the easy-to-clean micron coating according to any one of claims 1 to 4 or the easy-to-clean micron coating prepared by the preparation method according to any one of claims 5 to 9.

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