Crack-resistant glass and method for producing the same

Abstract

The application relates to an anti-crack glass and a preparation method thereof. The anti-crack glass comprises a glass base and an anti-crack coating arranged on the surface of the glass base, the material of the anti-crack coating comprises silica gel and a crosslinked silicone polymer; the mass fraction of silica sol before gelation is 40-60 parts, and the mass fraction of the uncrosslinked silicone polymer is 5-20 parts. The anti-crack glass can reduce the generation of glass cracks, prevent the expansion of initial cracks, and improve the anti-crack performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of glass coating, in particular to an anti-crack glass and a preparation method thereof. BACKGROUND

[0002] Glass is an important inorganic material, which is widely used in the construction industry, automotive industry, optoelectronic industry and other fields. For example, in the automotive industry, glass as one of the important structural materials has an important influence on the safety and comfort of vehicles. Glass usually needs to be tempered to improve its mechanical properties, which includes physical tempering and chemical tempering. Among them, physical tempering is divided into full tempering and semi-tempering. The surface stress of full tempered glass is ≥90MPa, and once it is impacted by a sharp object or self-explosion, it will produce small and numerous fragments, and the number of fragments in the range of 25mm×25mm is 40-400, and the length of the fragments is <100mm, as shown in Figure 1 . The interlayer surface stress of semi-tempered glass is ≥30MPa, and the fragments produced by breaking are long strips with a length of more than 100mm, and the number of fragments in the range of 25mm×25mm is less than 40, as shown in Figure 2 . The surface stress (CS) and stress layer depth (DOL) of chemically tempered glass are relatively large, generally CS is greater than 450MPa, and DOL is greater than 30μm, and when impacted by a sharp object or self-explosion, it will form a ring crack, and the crack will extend or expand along the direction of internal stress weakness, and the area of the fragments is larger than that of semi-tempered glass, as shown in Figure 3 .

[0003] Therefore, the conventional glass is prone to crack under stress, which reduces its service life and safety performance. How to reduce the generation of glass cracks and prevent the initial crack from expanding to improve the anti-crack performance of the glass is one of the problems to be solved. SUMMARY

[0004] Based on this, one or more embodiments of the present application provide an anti-crack glass which can reduce the generation of glass cracks and prevent the initial crack from expanding.

[0005] Some other embodiments of the present application also provide a preparation method of the anti-crack glass.

[0006] An anti-crack glass, comprising a glass substrate and an anti-crack coating arranged on the surface of the glass substrate, wherein the material of the anti-crack coating comprises a silica gel and a crosslinked silicone polymer.

[0007] The mass fraction of the silica sol before gelation is 40-60 parts by mass, and the mass fraction of the uncrosslinked silicone polymer is 5-20 parts by mass.

[0008] In some embodiments, the organic silicon polymer comprises one or more of a methylsilane-based organic silicon prepolymer, an ethylsilane-based organic silicon prepolymer, a phenylsilane-based organic silicon prepolymer, a polyurethane-based organic silicon prepolymer, and an acrylic-based organic silicon prepolymer.

[0009] Optionally, the organic silicon polymer comprises one or more of a methylsilane-based organic silicon prepolymer, a polyurethane-based organic silicon prepolymer, and an acrylic-based organic silicon prepolymer.

[0010] In some embodiments, the material of the anti-cracking coating further comprises one or more of an organic silicon modifier, an interfacial active agent, a thickening agent, and a filler.

[0011] In some embodiments, the organic silicon modifier comprises one or more of 3-methoxypropyltrimethoxysilane and 3-aminopropyltrimethoxysilane; and / or, the mass fraction of the organic silicon modifier is 1 part to 10 parts.

[0012] In some embodiments, the interfacial active agent comprises one or more of octyltrimethoxysilane and dipropylaminopropyltrimethoxysilane; and / or, the mass fraction of the interfacial active agent is 0.1 part to 2 parts.

[0013] In some embodiments, the thickening agent comprises one or more of polymethylsiloxane and polyvinyl alcohol; and / or, the mass fraction of the thickening agent is 0.1 part to 5 parts.

[0014] In some embodiments, the filler comprises one or more of silicon dioxide, aluminum oxide, and carbon black; and / or, the mass fraction of the filler is 1 part to 20 parts.

[0015] In some embodiments, the raw materials for preparing the anti-cracking coating comprise, in terms of mass fraction, 40 parts to 60 parts of a silica sol before gelation, 5 parts to 20 parts of an uncrosslinked organic silicon polymer, 1 part to 10 parts of an organic silicon modifier, 0.1 part to 2 parts of an interfacial active agent, 0.1 part to 5 parts of a thickening agent, and 1 part to 20 parts of a filler.

[0016] In some embodiments, the material of the anti-cracking coating further comprises one or more of an anti-reflective material, a hydrophilic material, a hydrophobic material, and an ultraviolet absorption-resistant material.

[0017] In some embodiments, one or more of the following conditions are satisfied:

[0018] (1) In the material of the anti-cracking coating, the mass fraction of the anti-reflective material is 10 parts to 30 parts.

[0019] (2) The anti-reflective material comprises one or more of silicon dioxide and indium tin oxide.

[0020] (3) In the material of the anti-crack coating, the mass fraction of the hydrophilic material is 1 part to 5 parts;

[0021] (4) The hydrophilic material comprises a hydrophilic surfactant;

[0022] (5) In the material of the anti-crack coating, the mass fraction of the hydrophobic material is 1 part to 10 parts;

[0023] (6) The hydrophobic material comprises one or more of a hydrophobic surfactant and a polydimethylsiloxane;

[0024] (7) In the material of the anti-crack coating, the mass fraction of the anti-ultraviolet absorption material is 1 part to 10 parts;

[0025] (8) The anti-ultraviolet absorption material comprises one or more of titanium dioxide and zinc oxide.

[0026] In some embodiments, the thickness of the anti-crack coating is 1 μm to 200 μm;

[0027] Optionally, the thickness of the anti-crack coating is 20 μm to 50 μm.

[0028] In some embodiments, the coefficient of thermal expansion of the anti-crack coating is 6 × 10 -6 / K to 15 × 10 -6 / K.

[0029] In some embodiments, the porosity of the anti-crack coating is 80% to 99%, and the average pore size is 1 nm to 20 nm.

[0030] In some embodiments, the pencil hardness of the anti-crack coating is ≥ 5.5H;

[0031] Optionally, the pencil hardness of the anti-crack coating is ≥ 5.7H;

[0032] Optionally, the pencil hardness of the anti-crack coating is ≥ 5.9H.

[0033] In some embodiments, the glass substrate is tempered glass.

[0034] A method for preparing an anti-crack glass, comprising the following steps:

[0035] applying a coating solution on the surface of a glass substrate; wherein, by mass percentage, the coating solution comprises: 40% to 60% silica sol, 5% to 20% silicone prepolymer, and 20% to 50% solvent;

[0036] drying and heat treating the coating solution to gel the silica sol and cross-link the silicone pre-polymer, forming a crack-resistant coating on the surface of the glass substrate, thereby producing a crack-resistant glass.

[0037] In some embodiments, the step of applying the coating solution on the surface of the glass substrate is preceded by a step of surface treating the glass substrate, the surface treatment comprising one or more of water washing, acid washing, sand blasting, and plasma treatment.

[0038] In some embodiments, the step of applying the coating solution on the surface of the glass substrate is performed by one of spraying and dip-coating.

[0039] In some embodiments, the step of drying and heat treating the coating solution is performed at a drying temperature of 25°C to 120°C and a heat treating temperature of 400°C to 500°C.

[0040] In some embodiments, the step of preparing the silica sol comprises:

[0041] mixing tetraethyl orthosilicate, absolute ethanol, and a basic reagent, aging, and heating to reflux, thereby producing a basic sol;

[0042] mixing tetraethyl orthosilicate, absolute ethanol, an acidic reagent, and water, thereby producing an acidic sol;

[0043] mixing the acidic sol with the basic sol, aging, thereby producing the silica sol.

[0044] The crack-resistant glass comprises a glass substrate and a crack-resistant coating, the crack-resistant coating comprising a silica gel and a cross-linked silicone polymer, the silica gel providing a base structure for the coating, and the cross-linked silicone polymer connecting the polymer chains together, thereby increasing the force between the polymer chains and enhancing the toughness and elasticity of the coating, which allows the coating to deform and bend to a certain extent under external stress, thereby slowing down the propagation of cracks. In addition, the toughness of the coating also increases the path length of the cracks, making them more tortuous, thereby reducing the speed of crack propagation. Therefore, the crack-resistant glass described above can improve the crack resistance of the glass by slowing down the speed of crack propagation. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 a fragment state diagram for fully tempered glass;

[0046] Figure 2 a fragment state diagram for semi-tempered glass;

[0047] Figure 3 a fragment state diagram for chemically tempered glass;

[0048] Figure 4 A schematic diagram of a hot air gun blowing film;

[0049] Figure 5 A schematic diagram of a crack depth exceeding the stress layer depth;

[0050] Figure 6 A schematic diagram of a glass producing edge chipping, nicking problems;

[0051] Figure 7 A microstructure diagram of a pore in a crack resistant coating;

[0052] Figure 8 A schematic diagram of a glass substrate and a crack resistant coating when the glass substrate is fully tempered glass;

[0053] Figure 9 A schematic diagram of a glass substrate and a crack resistant coating when the glass substrate is semi-tempered glass;

[0054] Figure 10 A schematic diagram of a glass substrate and a crack resistant coating when the glass substrate is chemically tempered glass;

[0055] Figure 11 A schematic diagram of applying a coating solution to a glass substrate surface using a spray method;

[0056] Figure 12 A schematic diagram of applying a coating solution to a glass substrate surface using a dip and draw method;

[0057] Figure 13 A schematic diagram of drying and heat treating a coating solution;

[0058] Figure 14 A process flow diagram of a method of making a crack resistant glass;

[0059] Figure 15 A transmittance curve of a glass before and after abrasion made according to Example 1. DETAILED DESCRIPTION

[0060] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the specific embodiments. The preferred embodiments of the present application are given to the best mode contemplated by the inventor of carrying out the present application. The present application may, however, be carried out in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0062] Unless otherwise defined, or the context dictates otherwise, the terms or phrases used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless specifically defined otherwise, or the context requires otherwise, the terms "comprise", "comprising", "comprises" "include", "including", "includes", "contain", "containing", "contains", "characterized by" and the like are used herein open-ended. These terms are, therefore, to be interpreted as specifying the presence of the stated features or components as referred to by such terms rather than by way of limitation.

[0063] In the present application, "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0064] In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0065] In the present application, "one or more" refers to any one, any two or any two or more of the listed items. Among them, "several" refers to any two or more.

[0066] In the present application, the percentage concentration involved, unless otherwise specified, refers to the final concentration. The final concentration refers to the proportion of the added component in the system after the component is added.

[0067] The word "optionally" and the like in the present application means that the embodiments of the present application can provide certain beneficial effects in some cases. However, other embodiments can also be optional in the same or other cases. In addition, the description of one or more optional embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the present application.

[0068] When a numerical range is disclosed in the present application, the above range is considered to be continuous and includes the minimum value and the maximum value of the range, and each value between the minimum value and the maximum value. Further, when the range is referred to as an integer, each integer between the minimum value and the maximum value of the range is included. In addition, when a plurality of ranges are provided to describe characteristics or properties, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed in the present application should be understood to include any and all sub-ranges incorporated therein.

[0069] In the present application, the technical features described in an open-ended manner include both the closed technical solution consisting of the listed features and the open technical solution including the listed features.

[0070] The terms "comprise" and "have" and any variations thereof in the embodiments of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device that comprises a list of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or components inherent to such processes, methods, products or devices.

[0071] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that that the embodiments described herein are combinable with each other.

[0072] The first aspect of the present application provides an anti-cracking glass, comprising a glass substrate and an anti-cracking coating layer arranged on the surface of the glass substrate, wherein the material of the anti-cracking coating layer comprises a silica gel and a cross-linked silicone polymer.

[0073] The mass fraction of the silica sol before gelation is 40-60 parts by mass, and the mass fraction of the uncross-linked silicone polymer is 5-20 parts by mass.

[0074] The silicone polymer (also referred to as a silicone prepolymer) refers to an organic substance containing a silicon bond.

[0075] In some embodiments, the silicone polymer comprises one or more of a methylsilane-based silicone prepolymer, an ethylsilane-based silicone prepolymer, a phenylsilane-based silicone prepolymer, a polyurethane-based silicone prepolymer, and an acrylic-based silicone prepolymer. It can be understood that, in this context, the silicone polymer refers to an uncross-linked silicone polymer, which can also be referred to as a silicone prepolymer, unless otherwise specified, and the cross-linked silicone polymer refers to a silicone polymer after cross-linking.

[0076] In some embodiments, the methylsilane-based silicone prepolymer, the ethylsilane-based silicone prepolymer, and the phenylsilane-based silicone prepolymer are prepared by hydrolytic condensation reaction of silicone monomers, wherein the silicone monomers comprise one or more of a methylsilane monomer, an ethylsilane monomer, and a phenylsilane monomer. These silicone monomers can form the main chain of the silicone prepolymer through hydrolytic condensation reaction.

[0077] In some embodiments, the organosilicon prepolymer includes a methylsilane monomer. The methylsilane monomer refers to a silicon compound containing a methyl group. Specifically, the methylsilane monomer includes one or both of methyltriethoxysilane (CH3Si(OC2H5)3) and methyltrichlorosilane (CH3SiCl3). The ethylsilane monomer contains an ethyl group and is used to prepare the organosilicon prepolymer with good adhesion and weather resistance. Specifically, the ethylsilane monomer includes one or more of ethyltrichlorosilane (C2H5SiCl3) and ethyltriethoxysilane (C2H5Si(OC2H5)3). The phenylsilane monomer refers to a silane monomer containing a phenyl group and is used to prepare the organosilicon prepolymer with excellent heat resistance and chemical stability. Specifically, the phenylsilane monomer includes one or more of phenyltrichlorosilane (C6H5SiCl3) and phenyltriethoxysilane (C6H5Si(OC2H5)3).

[0078] In some other embodiments, the organosilicon prepolymer includes a polyurethane-based organosilicon prepolymer. The polyurethane-based organosilicon prepolymer contains both polyurethane and organosilicon compounds in its structure. Specifically, the polyurethane-based organosilicon prepolymer is prepared by polymerizing organosilicon monomers and polyurethane raw materials such as polyisocyanate and polyol.

[0079] In some other embodiments, the organosilicon prepolymer includes an acrylic-based organosilicon prepolymer. The acrylic-based organosilicon prepolymer contains both acrylic resin and organosilicon in its structure. Specifically, the acrylic-based organosilicon prepolymer is prepared by polymerizing organosilicon monomers and acrylic acid.

[0080] In one specific example, the organosilicon prepolymer is prepared by mixing organosilicon monomers and optional reactants together in a certain ratio. A chemical reactor or a mixer can be used to ensure uniform mixing. The temperature, pressure, and reaction time of the reaction system are controlled according to the requirements of the reaction system. Different reaction methods can be used to prepare the organosilicon prepolymer, such as thermal polymerization, solvent polymerization, or radiation polymerization. In some embodiments, thermal polymerization is used, with a temperature of 100-200°C and a reaction time of several hours to several tens of hours, depending on the characteristics of the reaction system and the reactants. During the reaction, the progress of the reaction can be monitored by monitoring the consumption of the reactants, changes in the reaction temperature, or other indicators. This can be achieved through real-time monitoring and analysis techniques.

[0081] It can be understood that in some other embodiments, the organosilicon prepolymer can also be directly commercially available.

[0082] The type and proportion of the silicone prepolymer can affect the flexibility and elasticity of the prepared anti-cracking coating. Specifically, selecting a silicone prepolymer with higher flexibility can increase the flexibility of the coating, and increasing the proportion of the silicone prepolymer can improve the flexibility and elasticity of the coating. Selecting a silicone prepolymer with higher elasticity can increase the elasticity of the coating, and increasing the proportion of the silicone prepolymer can improve the elasticity of the coating.

[0083] Optionally, in some embodiments, the silicone prepolymer includes one or more of a methylsilyl silicone prepolymer, a polyurethane-based silicone prepolymer, and an acrylic-based silicone prepolymer.

[0084] The methylsilyl silicone prepolymer has good flexibility and elasticity, which can improve the scratch resistance and anti-cracking performance of the coating. Specifically, the mass fraction of the methylsilyl silicone prepolymer is 5 parts to 20 parts.

[0085] The polyurethane-based silicone prepolymer has good flexibility and elasticity. Specifically, the mass fraction of the polyurethane-based silicone prepolymer is 5 parts to 20 parts.

[0086] The acrylic-based silicone prepolymer can provide good flexibility and elasticity to the coating. Specifically, the mass fraction of the acrylic-based silicone prepolymer is 1 part to 10 parts.

[0087] In one specific example, the mass fraction of the silicone prepolymer can be, but is not limited to, 5 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 15 parts, 16 parts, 18 parts, 20 parts, or a range consisting of any two of these values.

[0088] In some embodiments, the preparation step of the silica sol includes:

[0089] Mixing tetraethyl orthosilicate (TEOS), anhydrous ethanol, and an alkaline reagent, aging, and heating to reflux to prepare an alkaline sol;

[0090] Mixing tetraethyl orthosilicate, anhydrous ethanol, an acidic reagent, and water to prepare an acidic sol;

[0091] Mixing the acidic sol with the alkaline sol, aging, to prepare the silica sol.

[0092] In one embodiment, the volume ratio of the acidic sol to the alkaline sol is (0.25-2.5):1. For example, the volume ratio of the acidic sol to the alkaline sol can be, but is not limited to, 0.25:1, 0.5:1, 1:1, 1.5:1, 2:1, 2.5:1, or a range consisting of any two of these values. By adjusting the proportion of the acidic sol to the alkaline sol, the refractive index of the prepared silica sol can be adjusted to 1.15-1.45.

[0093] In one embodiment, the basic reagent can be, but is not limited to, ammonia water. The acidic reagent can be, but is not limited to, hydrochloric acid.

[0094] In one embodiment, the temperature of the heating reflux is 80℃, and the time is 5h.

[0095] It can be understood that the above only gives a more specific preparation method of the silica sol, but is not limited thereto, and can also be prepared by other ways commonly used in the art.

[0096] In a specific example, the mass fraction of the silica sol before gelation can be, but is not limited to, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, or a range consisting of any two of these values.

[0097] The above anti-crack glass includes a glass substrate and an anti-crack coating, the material of the anti-crack coating includes a silica gel and a cross-linked silicone polymer, the silica gel provides a basic structure of the coating, and the silicone polymer, after being cross-linked, connects the polymer chains together, so that the force between the polymer chains is enhanced, and thus the toughness and elasticity of the coating are enhanced, which enables the coating to deform and bend to a certain extent under external stress, thereby slowing down the crack propagation. In addition, the toughness of the coating can also increase the path length of the crack, making it more tortuous, thereby reducing the speed of crack propagation. Therefore, the above anti-crack glass can improve the anti-crack performance of the glass by slowing down the speed of crack propagation.

[0098] There are many reasons for glass breakage. If caused by external force, it is generally easy to find the initiation point, see Figure 3 ; if the initiation point cannot be found, the breakage surface of the glass will be very uniform, and it is generally determined as glass self-explosion. The glass self-explosion rate is one in a thousand to one in three, which is related to the glass installation environment or subsequent modification.

[0099] Specifically, the reasons for glass breakage mainly include the following:

[0100] (1) Local thermal expansion and cracking. For example, during the process of pasting thermal insulation film in a beauty modification shop, glass self-explosion often occurs. This is because during the pasting of the film, an electric hair dryer is used to blow the film to shape, causing the glass to locally expand too much and deform, leading to glass breakage, as shown in Figure 4 . Even if there is no breakage during the construction process, it is possible to break during subsequent use, because the expansion coefficient of the thermal insulation film and the glass differs by about 10 times, and the glass deforms greatly in the environment with large temperature difference between cold and hot after pasting the film, and the stress generated by the thermal insulation film causes the glass to break.

[0101] (2) Micro-cracks cause the glass to break into pieces. In many cases, the initiation point of the cracks cannot be found, mainly because many micro-cracks and pores have been formed on the surface or edge of the glass during use, and these micro-cracks and pores are covered by the depth of the stress layer of the glass at the initial stage, and are not immediately visible or detected, but over time, the micro-cracks are slowly expanded by the internal stress layer, and when the depth of the cracks exceeds the depth of the stress layer, the glass breaks and obvious cracks appear, as shown in FIG. 2. Figure 5

[0102] (3) Defects in the quality of the machining process trigger the breakage. When the edge of the glass is machined by mechanical cutting, grinding, and drilling, the glass is also damaged, and micro-explosions, notches, and other cracks appear on the edge of the glass, especially at the corners and the edges of the drilled holes, which are more prone to such explosion problems. The cracks caused by the explosion can also cause self-explosion, as shown in FIG. 3. Figure 6

[0103] The coating prepared by the above coating solution solves the above different types of cracks. Specifically, for the cracks of type (1), the thermal expansion coefficient of the above anti-crack coating is between 6.0 x 10 -6 / K and 15 x 10 -6 / K, and the thermal expansion coefficient of the glass is 5.5 x 10 -6 / K, and the thermal expansion coefficient of the heat insulation film is 15 x 10 -6 / K to 25 x 10 -6 / K, and the thermal expansion coefficient of the anti-crack coating is between the two, which can effectively reduce the difference in expansion stress between the film and the glass, and reduce the risk of cracking due to local thermal expansion. In addition, for the cracks of types (2) and (3), the above coating solution can improve the anti-crack performance of the glass by slowing down the expansion speed of the cracks.

[0104] In some embodiments, the material of the anti-crack coating further comprises one or more of a silicone modifier, a surfactant, a thickening agent, and a filler.

[0105] In some embodiments, in the material of the anti-crack coating, the mass fraction of the silicone modifier is 1 part to 10 parts. For example, the mass fraction of the silicone modifier in the coating solution can be, but is not limited to, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or a range formed by any two of these values.

[0106] In some embodiments, the silicone modifier comprises one or more of 3-methoxypropyltrimethoxysilane and 3-aminopropyltrimethoxysilane.

[0107] ​​The addition of the organosilicon modifier in the crack-resistant coating is used to enhance the interfacial adhesion between the coating and the glass substrate, so that a good interfacial adhesion layer is formed between the coating and the glass substrate. This interfacial adhesion layer can enhance the bonding force between the coating and the substrate, thereby preventing the crack from propagating from the interface between the coating and the substrate, and further improving the crack-resistant performance of the prepared coating.

[0108] In particular, the micro-cracks of the above type (2) are formed due to the stress on the glass surface exceeding its bearing capacity under the action of external impact, scratching or stretching force, etc. The interfacial adhesion layer formed after the addition of the organosilicon modifier can increase the hardness, strength and toughness of the glass surface, disperse and absorb external stress, cooperate with the silica sol and organosilicon prepolymer, thereby reducing the concentration of mechanical stress and the propagation of cracks, and improving the crack-resistant performance. It can be understood that the crack-resistant performance of the above type (2) can also be improved when the coating solution does not contain the organosilicon modifier.

[0109] In some embodiments, the mass fraction of the interfacial active agent in the material of the crack-resistant coating is 0.1 parts to 2 parts. For example, the mass fraction of the interfacial active agent can be, but is not limited to, 0.1 parts, 0.3 parts, 0.5 parts, 0.7 parts, 0.9 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, or a range composed of any two of these values. In the coating solution, the addition of the interfacial active agent is used to adjust the compatibility and interfacial interaction between the organosilicon prepolymer and the glass substrate, and further adjust the surface tension and dispersibility of the coating solution, thereby improving the hardness and anti-friction performance of the coating. It can be understood that the type of interfacial active agent is not particularly limited, and can be the interfacial active agent commonly used in the art, such as non-ionic interfacial active agent, anionic interfacial active agent, cationic interfacial active agent and zwitterionic interfacial active agent.

[0110] In some embodiments, the interfacial active agent includes one or more of octyltrimethoxysilane and dipropylaminopropyltrimethoxysilane.

[0111] In some embodiments, the mass fraction of the thickening agent in the material of the crack-resistant coating is 0.1 parts to 5 parts. For example, the mass fraction of the thickening agent can be, but is not limited to, 0.1 parts, 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, or a range composed of any two of these values. The addition of the thickening agent in the crack-resistant coating is used to adjust the rheological properties of the organosilicon prepolymer, and further adjust the viscosity and flowability of the coating solution, form a more uniform and compact coating structure, and thereby further improve the anti-friction performance of the coating. It can be understood that the type of thickening agent is not particularly limited, and can be the thickening agent commonly used in the art, such as organic polymer, colloidal particles, etc.

[0112] In some embodiments, the thickening agent includes one or more of polymethylsiloxane and polyvinyl alcohol.

[0113] In some embodiments, the mass fraction of the filler in the material of the anti-cracking coating is 1 part to 20 parts. For example, the mass fraction of the filler can be, but is not limited to, 1 part, 2 parts, 5 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, or a range formed by any two of these values. The filler is added to the material of the anti-cracking coating in combination with other components to further adjust the pore structure of the coating, so that the coating has a higher porosity and pore distribution. These pores can absorb and disperse external stress. When external stress acts on the coating, the pores can bear part of the stress, thereby further slowing down the propagation speed of the stress and reducing the expansion speed of the cracks, enhancing the anti-cracking performance of the coating.

[0114] In some embodiments, the filler includes one or more of silicon dioxide, aluminum oxide, and carbon black. The above-mentioned fillers also have high hardness, which can increase the hardness of the coating and thus improve the anti-friction performance of the coating. Specifically, in an optional example, the filler includes an aluminum oxide filler, which can improve the hardness, wear resistance, and high-temperature resistance of the coating. Optionally, the mass fraction of the aluminum oxide filler in the anti-cracking coating is 5 parts to 20 parts, and the specific ratio can be determined according to the requirements of the coating and the application environment. In another optional example, the filler includes a carbon black filler, which is used to increase the electrical conductivity, wear resistance, and ultraviolet resistance of the coating. Optionally, the mass fraction of the carbon black filler in the anti-cracking coating is 1 part to 10 parts.

[0115] In some embodiments, the preparation raw materials of the anti-cracking coating include, in terms of mass fraction, 40 parts to 60 parts of silica sol before gelation, 5 parts to 20 parts of uncrosslinked silicone polymer, 1 part to 10 parts of silicone modifier, 0.1 part to 2 parts of surfactant, 0.1 part to 5 parts of thickening agent, and 1 part to 20 parts of filler.

[0116] In some embodiments, the material of the anti-cracking coating further contains one or more of anti-reflective material, hydrophilic material, hydrophobic material, and ultraviolet absorption material, so that the prepared anti-cracking coating also has one or more of anti-reflective, hydrophilic, hydrophobic, and sunscreen functions.

[0117] In some embodiments, the anti-reflective material is present in the anti-cracking coating in an amount of 10 parts to 30 parts by mass. The addition of the anti-reflective material to the anti-cracking coating can adjust the refractive index of the coating, reduce light reflection, and improve light transmittance. The anti-reflective material can be any commonly used in the art, for example, the anti-reflective material includes one or more of silicon dioxide and indium tin oxide. In some embodiments, the anti-reflective material includes silicon dioxide and indium tin oxide. The volume ratio of silicon dioxide to indium tin oxide is 8:2 to 9:1. It can be understood that the silicon dioxide gel in the anti-cracking coating can also adjust the refractive index and improve the light transmittance. When the anti-reflective material includes silicon dioxide, the total amount of the anti-reflective material and the silicon dioxide gel is 70 parts to 90 parts by mass.

[0118] In some embodiments, the hydrophilic material is present in the anti-cracking coating in an amount of 1 part to 5 parts by mass. The addition of the hydrophilic material to the anti-cracking coating can make the prepared coating hydrophilic. The hydrophilic material can be any commonly used in the art, for example, the hydrophilic material includes a hydrophilic surfactant. The hydrophilic surfactant can be, but is not limited to, sodium dodecyl sulfate.

[0119] In some embodiments, the hydrophobic material is present in the anti-cracking coating in an amount of 1 part to 10 parts by mass. The addition of the hydrophobic material to the anti-cracking coating can make the prepared coating hydrophobic. The specific hydrophobic material can be any commonly used in the art, for example, the hydrophobic material includes one or more of a hydrophobic surfactant and polydimethylsiloxane. In a specific example, the hydrophobic surfactant includes, but is not limited to, a fluorocarbon surfactant, and the amount of the hydrophobic surfactant in the coating solution is 1 part to 5 parts by mass. In another specific example, the amount of polydimethylsiloxane in the material of the anti-cracking coating is 1 part to 10 parts by mass.

[0120] In some embodiments, the anti-ultraviolet absorbing material is present in the anti-cracking coating in an amount of 1 part to 10 parts by mass. The addition of the anti-ultraviolet absorbing material to the anti-cracking coating can absorb or scatter ultraviolet light, thereby providing a sunscreen effect. The amount of the anti-ultraviolet absorbing material in the material of the anti-cracking coating can be adjusted in the range of 1 part to 10 parts by mass according to the desired sunscreen effect.

[0121] It can be understood that the specific anti-ultraviolet absorbing material can be any commonly used in the art, for example, the anti-ultraviolet absorbing material includes one or more of titanium dioxide and zinc oxide.

[0122] In some embodiments, the anti-cracking coating has a thickness of 1 μm to 200 μm. For example, the anti-cracking coating can have a thickness of 1 μm, 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, or a range defined by any two of these values. The thickness of the anti-cracking coating can be adjusted according to actual needs. Alternatively, the anti-cracking coating has a thickness of 20 μm to 50 μm.

[0123] In some embodiments, the anti-cracking coating has a coefficient of thermal expansion of 6 x 10 -6 / K to 15 x 10 -6 / K. For example, the anti-cracking coating can have a coefficient of thermal expansion of 6.0 x 10 -6 / K, 7.0 x 10 -6 / K, 8.0 x 10 -6 / K, 9.0 x 10 -6 / K, 10.0 x 10 -6 / K, 11.0 x 10 -6 / K, 12.0 x 10 -6 / K, 13.0 x 10 -6 / K, 14.0 x 10 -6 / K, 15.0 x 10 -6 / K, or a range defined by any two of these values. The coefficient of thermal expansion of glass is generally 5.5 x 10 -6 / K, while the coefficient of thermal expansion of the thermal insulation film is about 15 x 10 -6 / K to 25 x 10 -6 / K. The coefficient of thermal expansion of the anti-cracking coating is between the two, which can effectively reduce the difference in expansion stress between the thermal insulation film and the glass, and reduce the risk of cracking due to local thermal expansion. In particular, the cracks formed by thermal stress are usually caused by uneven expansion of glass due to temperature changes. The coating can slow down the conduction speed of temperature changes by changing the thermal conductivity of the glass surface, thereby reducing the generation of thermal stress and the formation of cracks.

[0124] In some embodiments, the crack-resistant coating has a porous structure. Specifically, the crack-resistant coating has a porosity of 80% to 99% and an average pore size of 1 nm to 20 nm. For example, the crack-resistant coating can have a porosity of 80%, 82%, 84%, 86%, 88%, 90%, 92%, 94%, 96%, 98%, 99%, or a range defined by any two of these values. The crack-resistant coating can have a pore size of 1 nm, 2 nm, 4 nm, 8 nm, 10 nm, 12 nm, 15 nm, 18 nm, 20 nm, or a range defined by any two of these values. The crack-resistant coating typically has a high porosity and pore distribution, and the pores can absorb and disperse external stress. When external stress is applied to the coating, the pores can bear a portion of the stress, thereby slowing the speed of stress propagation and reducing the speed of crack propagation.

[0125] Referring to Figure 7 , Figure 7 is a micrograph of the pore structure of the crack-resistant coating prepared.

[0126] In some embodiments, the crack-resistant coating has a pencil hardness of ≥ 5.5H. Further, the crack-resistant coating has a pencil hardness of ≥ 5.7H. Still further, the crack-resistant coating has a pencil hardness of ≥ 5.9H.

[0127] In some embodiments, the glass substrate is a tempered glass. For example, the glass substrate is a fully-tempered glass, a semi-tempered glass, or a chemically-tempered glass.

[0128] In some embodiments, the crack-resistant coating is disposed on at least one side of the glass substrate.

[0129] Referring to Figure 8 , a schematic view of a structure of a glass substrate and a crack-resistant coating when the glass substrate is a fully-tempered glass. In Figure 8 , the glass 200 includes a glass substrate 210 and a crack-resistant coating 220 disposed on the entire surface of the glass substrate 210, the glass substrate 210 is a fully-tempered glass, and the crack-resistant coating 220 completely covers the glass substrate 210.

[0130] Referring to Figure 9 , a schematic view of a structure of a glass substrate and a crack-resistant coating when the glass substrate is a semi-tempered glass. In Figure 9In some embodiments, the glass substrate is a glass substrate for a vehicle. The anti-cracking coating has excellent anti-cracking performance, and can effectively prevent the glass from cracking when subjected to stress, thereby improving the safety and durability of the vehicle glass.

[0131] Referring to FIG. 4, a schematic diagram of a structure of a glass substrate and an anti-cracking coating when the glass substrate is a chemically tempered glass is shown. In some embodiments, the glass substrate 400 includes an inner glass sheet 412, an inner anti-cracking coating 422 disposed on at least a portion of a surface of the inner glass sheet 412, an outer glass sheet 414, an outer anti-cracking coating 424 disposed on at least a portion of a surface of the outer glass sheet 414, and an interlayer 416 disposed between the inner glass sheet 412 and the outer glass sheet 414. In some embodiments, the anti-cracking coating is not disposed on a surface of the inner glass sheet 412 facing the interlayer 416, and is not disposed on a surface of the outer glass sheet 414 facing the interlayer 416. In some embodiments, the interlayer 416 can be, but is not limited to, a PVB layer. Figure 10 Figure 10 In some embodiments, the glass substrate is a glass substrate for a vehicle. The anti-cracking coating has excellent anti-cracking performance, and can effectively prevent the glass from cracking when subjected to stress, thereby improving the safety and durability of the vehicle glass.

[0132] In some embodiments, the glass substrate is a glass substrate for a vehicle. The anti-cracking coating has excellent anti-cracking performance, and can effectively prevent the glass from cracking when subjected to stress, thereby improving the safety and durability of the vehicle glass.

[0133] A second aspect of the present application provides a method for preparing an anti-cracking glass, comprising the following steps:

[0134] applying a coating solution on a surface of a glass substrate; wherein the coating solution comprises, by mass percentage, 40-60% of a silica sol, 5-20% of a silicone prepolymer, and 20-50% of a solvent;

[0135] drying and heat-treating the coating solution to gel the silica sol and crosslink the silicone prepolymer, thereby forming an anti-cracking coating on the surface of the glass substrate and preparing an anti-cracking glass.

[0136] The specific silica sol and silicone prepolymer are as described above, and are not repeated here.

[0137] In some embodiments, the solvent comprises an alcohol solvent. Optionally, the solvent comprises one or more of ethanol and isopropanol.

[0138] ​In one specific example, the mass percentage of the solvent in the coating solution can be, but is not limited to, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45%, 48%, 50%, or a range between any two of these values.

[0139] In some embodiments, one or more of a silicone modifier, a surfactant, a thickening agent, and a filler is further included in the coating solution. Specifically, the mass percentage of the silicone modifier in the coating solution is 1% to 10%. The mass percentage of the surfactant in the coating solution is 0.1% to 2%. The mass percentage of the thickening agent in the coating solution is 0.1% to 5%. The mass percentage of the filler in the coating solution is 1% to 20%.

[0140] Specifically, the coating solution includes, by mass percentage, 40% to 60% of silica sol, 5% to 20% of a silicone prepolymer, 20% to 50% of a solvent, 1% to 10% of a silicone modifier, 0.1% to 2% of a surfactant, 0.1% to 5% of a thickening agent, and 1% to 20% of a filler.

[0141] In some embodiments, one or more of an anti-reflective material, a hydrophilic material, a hydrophobic material, and an ultraviolet absorption material is further included in the coating solution, so that the prepared anti-cracking coating layer also has one or more of anti-reflective, hydrophilic, hydrophobic, and anti-sunlight functions.

[0142] In some embodiments, the mass percentage of the anti-reflective material in the coating solution is 10% to 30%. In some embodiments, the mass percentage of the hydrophilic material in the coating solution is 1% to 5%. In some embodiments, the mass percentage of the hydrophobic material in the coating solution is 1% to 10%. In some embodiments, the mass percentage of the ultraviolet absorption material in the coating solution is 1% to 10%.

[0143] The specific materials are as described above in the first aspect, which will not be repeated here.

[0144] In some embodiments, before the step of applying the coating solution to the surface of the glass substrate, a step of surface treatment of the glass substrate is further included, which includes one or more of water washing, acid washing, sandblasting, and plasma treatment. The above-mentioned surface treatment is advantageous to improve the adhesion of the coating.

[0145] In some embodiments, in the step of applying the coating solution to the surface of the glass substrate, one of spraying and dip-coating is used.

[0146] Please refer toFigure 11 , Figure 11 A schematic diagram of applying the coating solution to the surface of the glass substrate by spraying is shown.

[0147] Please refer to Figure 12 , Figure 12 A schematic diagram of applying the coating solution to the surface of the glass substrate by dip-coating is shown.

[0148] It can be understood that the coating method is not limited to the above two methods, and other methods commonly used in the art can also be used, as long as the coating is uniform and closely adheres to the surface of the glass.

[0149] Specifically, the glass coated with the coating solution is dried and heat treated. Through the above steps, the particles in the sol are aggregated and form a coating, and the coating forms a dense structure and is firmly combined with the glass substrate.

[0150] In some embodiments, the drying step is performed at a temperature of 25-120°C for 1-6 hours. For example, the drying temperature can be, but is not limited to, 25°C, 50°C, 60°C, 80°C, 100°C, 120°C, or a range formed by any two of these values. The drying time can be, but is not limited to, 1h, 2h, 3h, 4h, 5h, 6h, or a range formed by any two of these values. The solvent is removed by drying, and the silicone prepolymer is crosslinked and cured at the same time. By optimizing the drying temperature and time, the elasticity and toughness of the prepared coating can be adjusted. For example, lower curing temperature and longer curing time can promote the crosslinking reaction of the silicone prepolymer, forming more crosslinking structures, thereby increasing the toughness of the coating. Higher curing temperature and shorter curing time can control the degree of crosslinking of the silicone prepolymer, forming fewer crosslinking structures, thereby increasing the elasticity of the coating.

[0151] In some embodiments, the heat treatment step is performed at a temperature of 400-500°C. For example, the heat treatment temperature can be, but is not limited to, 400°C, 410°C, 420°C, 430°C, 440°C, 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, or a range formed by any two of these values. The organic components are removed by heat treatment.

[0152] Specifically, in the heat treatment step, air drying, hot air blowing, ultraviolet irradiation, or an oven, etc. are used to achieve the heat treatment. Please refer to Figure 13 , Figure 13 A schematic diagram of heat treatment is shown.

[0153] Please refer to Figure 14 , the method for preparing the crack-resistant glass according to some embodiments of the present application comprises the following steps:

[0154] Step S110: mixing silica sol, silicone pre-polymer and solvent to prepare a coating solution.

[0155] It can be understood that the mixing method is not particularly limited, and the components can be mixed uniformly to form a uniform coating solution. In addition, in the mixing step, the components can be added to the container one by one for mixing, or can be added to the container at the same time for mixing.

[0156] Step S120: surface treatment of the glass substrate.

[0157] Specifically, the surface treatment includes one or more of water washing, acid washing, sand blasting and plasma treatment.

[0158] Step S130: applying the coating solution to the surface of the glass substrate.

[0159] Specifically, the method of applying the coating solution to the surface of the glass substrate includes one of spraying and dip-coating.

[0160] Step S140: drying and heat-treating the coating solution to form a crack-resistant coating on the surface of the glass substrate to prepare a crack-resistant glass.

[0161] The above provides a simple and efficient preparation method, which can prepare a glass with excellent crack resistance, so that the coating has good toughness and elasticity, can absorb energy when stressed, and reduce the expansion of cracks. Further, the coating and the glass substrate have good interfacial adhesion, which can effectively prevent the coating from falling off. The crack-resistant glass prepared above can improve the safety and durability of the automobile glass and prolong its service life.

[0162] In order to make the purpose and advantages of the present application more clear, the crack-resistant glass and its effects of the present application will be further described in detail in combination with specific examples. It should be understood that the specific examples described herein are only used to explain the present application and should not be used to limit the present application. The following examples do not include other components except unavoidable impurities, unless otherwise specified. In the examples, the drugs and instruments are selected according to the conventional selection in the art, unless otherwise specified. The experimental methods in the examples are carried out according to the conventional conditions, for example, the conditions described in the literature, books or the methods recommended by the manufacturer.

[0163] Example 1

[0164] The present embodiment provides a crack-resistant glass, which comprises a glass substrate and a crack-resistant coating arranged on the surface of the glass substrate, and the preparation process of the crack-resistant coating is as follows:

[0165] (1) Mixing and stirring the following raw materials by mass percentage: silica sol 45%, acrylic-based silicone prepolymer 10%, alumina filler 5%, interface active agent octyl trimethoxysilane 0.5%, silicone modifier 3-methoxypropyl trimethoxysilane 4.4%, thickening agent polymethylsiloxane 0.1%, and solvent ethanol 35% to prepare a coating solution.

[0166] (2) Surface treatment of the glass substrate.

[0167] (3) Coating the above coating solution on the surface of the glass substrate.

[0168] (4) Drying and heat treatment of the coating solution, the drying temperature is 80°C, the heat treatment temperature is 450°C, and an anti-crack coating with a thickness of 35 μm is formed on the surface of the glass substrate.

[0169] Examples 2-5

[0170] Examples 2-5 each provide a glass, which is similar to Example 1, except that the composition and ratio of the coating solution are different in the process of preparing the anti-crack coating, as shown in Table 1.

[0171] Comparative Example 1

[0172] Comparative Example 1 provides a glass, which is the same as the glass substrate of Example 1, and does not have an anti-crack coating.

[0173] Comparative Example 2

[0174] Comparative Example 2 provides an anti-crack glass, which is similar to Example 1, except that the composition and ratio of the coating solution are different in the process of preparing the anti-crack coating, as shown in Table 1.

[0175] Table 1 Composition of the coating solution in the examples and comparative examples

[0176]

[0177] The surface hardness test of the anti-crack coating prepared in each example and comparative example is shown in Table 2. The transmittance of the glass of each example and comparative example and the transmittance after rubbing on the abrasion tester for 3000 times are shown in Table 2. Among them, the coating surface hardness test: the film hardness is determined according to GB / T 6739 pencil method, and the glass substrate is 2.1 white glass as the experimental sample. The transmittance change curve of the glass of Example 1 before and after rubbing is shown in Figure 15 From the figure, it can be seen that after strong mechanical rubbing, the average transmittance of the coating decreases by only about 0.5%.

[0178] Table 2 Performance test of each example and comparative example

[0179]

[0180] The comparison of Example 1 and Example 2 can show that the use of silicone prepolymers as crosslinking agents can enhance the wear resistance and crack resistance of the coating, forming a more stable and durable coating structure.

[0181] The comparison of Example 1 and Example 3 can show that the use of interfacial active agents can improve the compatibility and interfacial interaction between the organic polymer and the substrate, thereby improving the hardness of the coating and thus enhancing the anti-friction performance.

[0182] The comparison of Example 1 and Example 4 can show that hard fillers such as silica and alumina have high hardness, which can increase the hardness of the coating and thus improve the anti-friction performance of the coating.

[0183] The comparison of Example 1 and Example 5 can show that the use of appropriate thickening agents can increase the viscosity and viscosity of the coating, forming a more uniform and compact coating structure, thereby improving the anti-friction performance of the coating.

[0184] The comparison of Example and Comparative Example can show that the anti-friction performance of the coating prepared in Example is better than that of Comparative Example.

[0185] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0186] The above-described embodiments only express several embodiments of the present application, which are convenient for specific and detailed understanding of the technical solutions of the present application, but should not be understood as a limitation on the scope of patent protection. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. It should be understood that the technical solutions obtained by the skilled person in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are within the scope of protection of the appended claims of the present application. Therefore, the scope of protection of the present patent should be based on the contents of the appended claims, and the description and drawings can be used to explain the contents of the claims.

Claims

1. A crack resistant glass, characterized by, The invention includes a glass substrate and a crack-resistant coating disposed on the surface of the glass substrate, wherein the material of the crack-resistant coating includes silica gel and cross-linked organosilicon polymer; By mass fraction, the silica sol before gelation is 40 to 60 parts, and the uncrosslinked organosilicon polymer is 5 to 20 parts. The porosity of the crack-resistant coating is 80%~99%.

2. The crack resistant glass according to claim 1, wherein, The organosilicon polymer includes one or more of methylsilyl organosilicon prepolymers, ethylsilyl organosilicon prepolymers, phenylsilyl organosilicon prepolymers, polyurethane-based organosilicon prepolymers, and acrylic-based organosilicon prepolymers.

3. The crack resistant glass according to claim 2, wherein, The organosilicon polymer includes one or more of methylsilyl organosilicon prepolymers, polyurethane-based organosilicon prepolymers, and acrylic-based organosilicon prepolymers.

4. The crack resistant glass of claim 1, wherein, The materials of the anti-crack coating also include one or more of the following: organosilicon modifier, surfactant, thickener, and filler.

5. The crack resistant glass according to claim 4, wherein, The organosilicon modifier includes one or more of 3-methoxypropyltrimethoxysilane and 3-aminopropyltrimethoxysilane; and / or, the organosilicon modifier is in the form of 1 to 10 parts by mass.

6. The crack resistant glass according to claim 4, wherein, The surfactant includes one or more of octyltrimethoxysilane and dipropylaminopropyltrimethoxysilane; and / or, the surfactant is present in a mass fraction of 0.1 to 2 parts.

7. The crack resistant glass according to claim 4, wherein, The thickener includes one or more of polymethylsiloxane and polyvinyl alcohol; and / or, the thickener is in the range of 0.1 to 5 parts by mass.

8. The crack resistant glass according to claim 4, wherein, The filler includes one or more of silica, alumina and carbon black; and / or, the filler is in the form of 1 to 20 parts by mass.

9. The crack resistant glass of claim 1, wherein, The raw materials for preparing the crack-resistant coating, by mass, include: 40 to 60 parts of silica sol before gelation, 5 to 20 parts of uncrosslinked organosilicon polymer, 1 to 10 parts of organosilicon modifier, 0.1 to 2 parts of surfactant, 0.1 to 5 parts of thickener, and 1 to 20 parts of filler.

10. The crack-resistant glass according to any one of claims 1 to 9, wherein The material of the crack-resistant coating also contains one or more of the following: anti-reflective materials, hydrophilic materials, hydrophobic materials, and anti-ultraviolet absorption materials.

11. The crack-resistant glass according to claim 10, characterized in that, One or more of the following conditions must be met: (1) In the material of the anti-crack coating, the mass fraction of the anti-reflective material is 10 to 30 parts; (2) The antireflective material includes one or more of silicon dioxide and indium tin oxide; (3) In the material of the anti-crack coating, the hydrophilic material is in the form of 1 to 5 parts by mass; (4) The hydrophilic material includes a hydrophilic surfactant; (5) In the material of the anti-crack coating, the hydrophobic material is 1 to 10 parts by mass; (6) The hydrophobic material includes one or more of hydrophobic surfactants and polydimethylsiloxane; (7) In the material of the crack-resistant coating, the mass fraction of the anti-ultraviolet absorption material is 1 to 10 parts; (8) The UV-absorbing material includes one or more of titanium dioxide and zinc oxide.

12. The crack-resistant glass according to any one of claims 1 to 9 and 11, characterized in that, The thickness of the anti-crack coating is 1μm to 200μm.

13. The crack-resistant glass according to claim 12, characterized in that, The thickness of the anti-crack coating is 20μm~50μm.

14. The crack-resistant glass according to any one of claims 1 to 9 and 11, characterized in that, The coefficient of thermal expansion of the anti-cracking coating is in the range of 6 x 10 -6 / K~15 x 10 -6 / K.

15. The crack-resistant glass according to any one of claims 1 to 9 and 11, characterized in that, The average pore size of the anti-crack coating is 1 nm to 20 nm.

16. The crack-resistant glass according to any one of claims 1 to 9 and 11, characterized in that, The pencil hardness of the anti-crack coating is ≥5.5H.

17. The crack-resistant glass according to claim 16, characterized in that, The pencil hardness of the anti-crack coating is ≥5.7H.

18. The crack-resistant glass according to claim 17, characterized in that, The pencil hardness of the anti-crack coating is ≥5.9H.

19. The crack-resistant glass according to any one of claims 1 to 9 and 11, characterized in that, The glass substrate is tempered glass.

20. A method for preparing crack-resistant glass, characterized in that, Includes the following steps: A coating solution is applied to the surface of a glass substrate; wherein, by mass percentage, the coating solution comprises: 40%~60% silica sol, 5%~20% organosilicon prepolymer, and 20%~50% solvent; The coating solution is dried and heat-treated to gel the silica sol, and the organosilicon prepolymer is crosslinked to form an anti-crack coating on the glass substrate, thereby preparing crack-resistant glass. The porosity of the crack-resistant coating is 80%~99%.

21. The method for preparing crack-resistant glass according to claim 20, characterized in that, Before the step of applying the coating solution to the surface of the glass substrate, the method further includes a step of surface treatment of the glass substrate, the surface treatment including one or more of water washing, acid washing, sandblasting and plasma treatment.

22. The method for preparing crack-resistant glass according to claim 20, characterized in that, The step of applying the coating solution to the surface of the glass substrate is carried out by one of the methods of spraying and dip-coating.

23. The method for preparing crack-resistant glass according to claim 20, characterized in that, In the steps of drying and heat treating the coating solution, the drying temperature is 25℃~120℃, and the heat treatment temperature is 400℃~500℃.

24. The method for preparing crack-resistant glass according to any one of claims 20 to 23, characterized in that, The preparation steps of the silica sol include: Tetraethyl orthosilicate, anhydrous ethanol, and an alkaline reagent were mixed, aged, and heated under reflux to prepare an alkaline sol. An acidic sol was prepared by mixing tetraethyl orthosilicate, anhydrous ethanol, an acidic reagent, and water. The acidic sol is added to the alkaline sol and mixed, then aged to prepare the silica sol.

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