Silica sol enhanced hollow safety glass and preparation method thereof

Abstract

The invention discloses silica sol enhanced hollow safety glass and a preparation method thereof. The silica sol enhanced hollow safety glass comprises three layers, wherein the first layer is sandwich glass; the second layer is of a hollow structure; the third layer is single-layer glass or sandwich glass; the contact surface of the first layer and the second layer is a first contact surface; thecontact surface of the second layer and the third layer is a second contact surface; at least one surface of the first contact surface and the second contact surface is provided with a silica sol coating; the thickness of the silica sol coating is 1 to 20 mum; the silica content of the silica sol coating is not lower than 95 percent. The silica sol enhanced hollow safety glass has high bending strength and anti-impact capability; the spontaneous explosion risk is eliminated; the cost is reduced.

Description

technical field

[0001] The invention relates to a hollow safety glass reinforced by silica sol and a preparation method thereof, belonging to the technical field of hollow safety glass. Background technique

[0002] At present, tempered reinforced glass is generally used for door, window and curtain wall glass of high-rise buildings, but tempered reinforced glass is prone to self-explosion during use, causing safety problems. Nickel sulfide and other heterogeneous particles such as elemental silicon are the source of self-explosion of tempered glass. The reason is that the thermal expansion coefficient of the heterogeneous particles does not match the glass, which causes tensile stress on the glass around the elemental silicon particles during the cooling process. The glass cracked. Usually, the self-explosion of tempered glass caused by nickel sulfide can be eliminated by homogeneous treatment, but, as stated in the document "Safety and Countermeasures of Curtain Wall Glas...

Examples

Embodiment 1

[0030] Embodiment 1: the present invention implements coating SiO to the single side of single-layer glass 2 For the sol, the glass substrate uses common soda-lime annealed glass, which is thin glass with a thickness of 2mm. Coatings were prepared by the sol-gel method. The sol uses tetraethyl orthosilicate as the main raw material, γ-glycidyl etheroxypropyl trimethoxysilane (KH560) as the coupling agent, water and alcohols (ethanol or isopropanol) as the solvent, and the water and alcohol in the solvent The proportion is 1:3 (weight ratio), mixed according to the ratio of main raw material 14%, coupling agent 12%, solvent 74% (by weight ratio), and adding 2% of the total mass of main raw material, coupling agent and solvent 0.1mol / L nitric acid, prepared as acidic SiO 2 Sol. On one side of the single-layer glass, use a wire bar coater to apply the sol by scraping, the wet film thickness is 100 μm, and after standing for leveling, heat-cure at 180°C for 1 hour to obtain a s...

Embodiment 2

[0035] Embodiment 2: by (2mm semi-tempered glass)+1.52PVB+(2mm semi-tempered glass+1μmSiO 2 coating)+12mm hollow structure+(1μmSiO 2 Coating + 4mm semi-tempered glass), according to the combination of overlapping together to make such figure 1 Insulating safety glass shown, SiO 2 The coating is located on figure 1 The 4th and 6th sides of the same example, the other is the same as that of Example 1, the measured compressive strength> 6000Pa, reaching the wind compressive strength required by the building design code (the compressive strength of a 6mm single-layer glass sheet is not less than 5000Pa), meeting JC846- The requirements for Class A and Class B safety glass specified in the 2007 standard.

Embodiment 3

[0036] Embodiment 3: by (2mm semi-tempered glass)+1.52PVB+(2mm semi-tempered glass+15μmSiO 2 Coating) + 12mm hollow structure + (2mm semi-tempered glass) + 1.52PVB + (2mm semi-tempered glass), according to the combination of overlapping to make such figure 2 Insulating safety glass shown, SiO 2 The coating is located on figure 2 The fourth side is the same as that in Example 1, and the measured compressive strength is >6000Pa, which reaches the wind compressive strength required by the architectural design code (the compressive strength of a 6mm single-layer glass sheet is not less than 5000Pa), and meets the requirements of the JC846-2007 standard. The requirements for Class A and Class B safety glass are specified.

technical field

[0001] The invention relates to a hollow safety glass reinforced by silica sol and a preparation method thereof, belonging to the technical field of hollow safety glass. Background technique

[0002] At present, tempered reinforced glass is generally used for door, window and curtain wall glass of high-rise buildings, but tempered reinforced glass is prone to self-explosion during use, causing safety problems. Nickel sulfide and other heterogeneous particles such as elemental silicon are the source of self-explosion of tempered glass. The reason is that the thermal expansion coefficient of the heterogeneous particles does not match the glass, which causes tensile stress on the glass around the elemental silicon particles during the cooling process. The glass cracked. Usually, the self-explosion of tempered glass caused by nickel sulfide can be eliminated by homogeneous treatment, but, as stated in the document "Safety and Countermeasures of Curtain Wall Glas...

Examples

Embodiment 1

[0030] Embodiment 1: the present invention implements coating SiO to the single side of single-layer glass 2 For the sol, the glass substrate uses common soda-lime annealed glass, which is thin glass with a thickness of 2mm. Coatings were prepared by the sol-gel method. The sol uses tetraethyl orthosilicate as the main raw material, γ-glycidyl etheroxypropyl trimethoxysilane (KH560) as the coupling agent, water and alcohols (ethanol or isopropanol) as the solvent, and the water and alcohol in the solvent The proportion is 1:3 (weight ratio), mixed according to the ratio of main raw material 14%, coupling agent 12%, solvent 74% (by weight ratio), and adding 2% of the total mass of main raw material, coupling agent and solvent 0.1mol / L nitric acid, prepared as acidic SiO 2 Sol. On one side of the single-layer glass, use a wire bar coater to apply the sol by scraping, the wet film thickness is 100 μm, and after standing for leveling, heat-cure at 180°C for 1 hour to obtain a s...

Embodiment 2

[0035] Embodiment 2: by (2mm semi-tempered glass)+1.52PVB+(2mm semi-tempered glass+1μmSiO 2 coating)+12mm hollow structure+(1μmSiO 2 Coating + 4mm semi-tempered glass), according to the combination of overlapping together to make such figure 1 Insulating safety glass shown, SiO 2 The coating is located on figure 1 The 4th and 6th sides of the same example, the other is the same as that of Example 1, the measured compressive strength> 6000Pa, reaching the wind compressive strength required by the building design code (the compressive strength of a 6mm single-layer glass sheet is not less than 5000Pa), meeting JC846- The requirements for Class A and Class B safety glass specified in the 2007 standard.

Embodiment 3

[0036] Embodiment 3: by (2mm semi-tempered glass)+1.52PVB+(2mm semi-tempered glass+15μmSiO 2 Coating) + 12mm hollow structure + (2mm semi-tempered glass) + 1.52PVB + (2mm semi-tempered glass), according to the combination of overlapping to make such figure 2 Insulating safety glass shown, SiO 2 The coating is located on figure 2 The fourth side is the same as that in Example 1, and the measured compressive strength is >6000Pa, which reaches the wind compressive strength required by the architectural design code (the compressive strength of a 6mm single-layer glass sheet is not less than 5000Pa), and meets the requirements of the JC846-2007 standard. The requirements for Class A and Class B safety glass are specified.

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