WO2018145014A1 - Thermally insulating glass laminates with a non-uniform coating layer and sealed cavities of gas molecules - Google Patents
Thermally insulating glass laminates with a non-uniform coating layer and sealed cavities of gas molecules Download PDFInfo
- Publication number
- WO2018145014A1 WO2018145014A1 PCT/US2018/016881 US2018016881W WO2018145014A1 WO 2018145014 A1 WO2018145014 A1 WO 2018145014A1 US 2018016881 W US2018016881 W US 2018016881W WO 2018145014 A1 WO2018145014 A1 WO 2018145014A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laminate
- coating layer
- substrate
- oven
- coating composition
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
- B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/04—Frit compositions, i.e. in a powdered or comminuted form containing zinc
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/004—Windows not in a door
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/008—Illumination for oven cavities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/02—Doors specially adapted for stoves or ranges
- F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
Definitions
- the present disclosure relates to thermally insulating glass laminates.
- Glass laminates are used in high temperature applications as windows and site glasses for the purpose of viewing a heated cavity.
- the laminates have multiple panes of glass with a gap between the panes to prevent direct heat transfer from the cavity to the outer pane, but the temperature of the outer pane still increases and heat escapes into the surrounding environment because of convective heat transfer through air in the gap between the panes.
- Heat insulating coatings have been used to prevent heat loss but many coatings are inadequate.
- a light diffuser is an element that transmits visible light but minimizes the transmission of medium and long wavelength infrared light. Most light diffusers are not necessarily adequate to thermally insulate functional components such as LED's, cameras, lighting assemblies, wiring, sensors and semiconductor components from the high temperatures in residential and
- the thermally insulating glass laminates comprise a non-uniform low or non-conductive coating layer that forms a chemical bond with at least one inner surface of the substrates, where the coating layer can have a thickness of about 0.010 inches or less.
- the non-uniform low or non- conductive coating layer helps form a plurality of sealed three-dimensional cavities between the substrates each having a very small volume with a small amount of gas molecules therein. Since there is a small amount of gas molecules in each cavity, convective heat transfer between the substrates is minimized thereby minimizing heat loss through the laminates and into the surrounding environment.
- thermally insulating glass laminates are optimal insulators when the gas cavity has a thickness of about 15 millimeters, where thinner cavities have increased conduction losses and thicker cavities have increased convection losses. This knowledge suggests that decreasing the thickness of the cavity would increase conduction losses, but conduction losses are not increased in the current disclosure.
- thermally insulating glass laminates of the disclosure can be used, in one non- limiting example, in high temperature applications such as windows and site glasses in residential and commercial ovens and applications having heated cavities where low heat loss and cool outlet window temperatures are desired.
- high temperature applications are above about 175 °C.
- the present disclosure provides a thermally insulating laminate comprising a first glass substrate having an inner surface, a second glass substrate having an inner surface, and a non-uniform low or non-conductive coating layer that forms a chemical bond with at least one inner surface.
- the coating layer has a thickness of about 0.010 inches or less and forms a pattern that contacts about 30% or less of the at least one inner surface.
- a plurality of sealed cavities of gas molecules exists between the substrates.
- the present disclosure also relates to light diffusers that thermally insulate functional components, such as LED's, cameras, lighting assemblies, wiring, sensors and semiconductor components, in or near heated cavities.
- the light diffuser comprises the thermally insulating glass laminate described herein.
- the light diffuser may have a thermally insulating glass laminate located between the oven cavity and the functional element so that the laminate partially or completely insulates the functional element from the temperature within the cavity.
- a heat reflective coating is provided on one or more components of the laminate to provide additional heat insulation.
- Figure 1 illustrates a portion of a laminate having a plurality of circular-shaped cavities formed using a non-uniform coating layer that contacts about 30% or less of at least one inner surface of the substrates.
- Figure 2 shows a schematic diagram of the laminate of the present disclosure.
- Figure 3 shows a schematic diagram of an oven using the laminate of the present disclosure to shield a functional component.
- the thermally insulating glass laminates comprise a first glass substrate having an inner surface, a second glass substrate having an inner surface, and a non-uniform low or non-conductive coating layer that forms a chemical bond with at least one inner surface, wherein the non-uniform low or non-conductive coating layer has a thickness of about 0.010 inches or less and forms a pattern that contacts about 30% of less of at least one inner surface, and wherein a plurality of sealed cavities of gas molecules exists between the substrates.
- the plurality of sealed cavities of gas molecules may comprise in some embodiments without limitation about 5 to about 400, about 100 to about 400, or about 5 to about 50 cavities per square centimeter of the coating layer.
- the width of the coating measured between each cavity may be without limitation less than about 0.5, about 0.01 to about 0.5, or about 0.02 to about 0.1 millimeters.
- the coating layer should prevent the substrates from touching.
- One of the purposes of the coating layer is to provide spacing between the substrates to trap gas molecules in the plurality of sealed cavities between the substrates.
- the conductivity of the coating layer is about 5 W/(m-K) or less, or about 3.5 W/(m-K) or less.
- the conductivity of the coating layer is lower than the conductivity of the substrates that contact the coating composition.
- a "low conductive" coating layer has a conductivity of about 5 W/(m-K) or less and a “non-conductive” coating layer has a conductivity of 0 or about 0 W/(m-K).
- the coating layer creates an insulating layer between the substrates to minimize convective currents and reduce heat transfer between the substrates.
- the coating layer is a low or non-conductive coating layer formed from a coating composition, such as in one non-limiting example an enamel, a frit, or a combination thereof, each comprising a ceramic compound, a glass compound or a combination thereof, optionally with other compounds, some of which may evaporate when curing the coating composition to form the coating layer.
- the ceramic and glass compounds in the coating layer have a similar composition and thermal expansion properties compared to the substrate that contacts the coating layer.
- Figs. 1 and 2 show schematic drawings of laminate 10 of the present disclosure.
- Laminate 10 has first glass substrate 20, second glass substrate 30, and coating 40.
- Coating 40 has pores 45, which, as previously discussed, form cavities between substrates 20 and 30 in laminate 10.
- the coating composition may comprise a frit, which is a mixture of inorganic chemical substances produced by rapidly quenching a molten, complex combination of materials, and confining the chemical substances thus manufactured as non-migratory components of glassy solid flakes or granules.
- Frits include in one non-limiting example all of the chemical substances specified below when they are intentionally manufactured in the production of the frit.
- the primary members include without limitation oxides of some or all of the elements listed below, where fluorides of these elements may also be included: aluminum, antimony, arsenic, barium, bismuth, boron, cadmium, calcium, cerium, chromium, cobalt, copper, gold, iron, lanthanum, lead, lithium, magnesium, manganese, molybdenum, neodymium, nickel, niobium, phosphorus, potassium, silicon, silver, sodium, strontium, tin, titanium, tungsten, vanadium, zinc, zirconium, and combinations thereof.
- the most common frits are bismuth and zinc based frits.
- the frits may comprise pigments added in small percentages for color purposes.
- a non-limiting example of a suitable coating composition is:
- Titanium Dioxide 32-36%
- Suitable coating composition is:
- Zinc Oxide 16-20%
- the non-uniform coating layer may be applied to the substrate by silk screening or any other suitable technique. As shown in Figure 1, the non-uniform coating layer has voids and does not contact the entire surface of the substrate. The non-uniform coating layer can form a regular or irregular pattern. When silk screening for example, the coating composition is injected through the screen to form the pattern. The patterned and non-uniform coating composition helps form a plurality of sealed cavities of gas molecules between the substrates.
- the coating layer may be transparent or colored. Intermediate layers, additional substrates and additional coating layers may be present as desired.
- the laminates may be formed by chemically bonding the coating layer to at least one of the substrates in any manner known to those skilled in the art.
- the laminates may be formed by steps comprising applying the coating composition to a first substrate, heating the coating composition to adhere the coating composition to the first substrate, applying a second substrate on the heated coating composition, and firing the heated coating composition to form a chemical bond between the coating layer and at least one of the substrates.
- the laminates are formed by steps comprising applying the coating composition to a first substrate, applying a second substrate on the coating composition, then firing the coating composition to form a chemical bond between the coating layer and at least one of the substrates.
- at least one of the coating layers, the first substrate and the second substrate may form a chemical bond with at least one of the others.
- the coating layers of the disclosure is pyrolytic because the coating layer is chemically bonded to the substrate by sharing an oxygen atom and becoming part of the Si-O-X chain.
- Pyrolytic coatings are "hard” coatings and differ from “soft” coatings like paint that are mechanically adhered to a substrate. Pyrolytic coatings compared to adhered coatings have superior wear resistance, do not easily scratch off, and typically do not require protective topcoats.
- the pyrolytic coatings of the disclosure can be applied in any manner known to those skilled in the art, such as by deposition using a high temperature plasma process or silk screening.
- glass as used herein includes glass and glass-ceramics, including but not limited to soda lime, borosilicate, lithium aluminosilicate, and combinations thereof.
- substrate signifies a platform to which the coatings described herein and other elements can be applied.
- the substrates are not limited in shape.
- the substrates may be flat, curved, concave or convex, and may have rectangular, square or other dimensions.
- the substrate comprises a glass material and have a thickness of about 1 to about 10 mm or about 2 to about 5 mm.
- the coating layer is non-uniform because it does not cover the entire surface area of a substrate. Instead, the non-uniform coating layer is distributed in a pattern that helps form a plurality of sealed cavities of gas molecules between the substrates.
- the pattern may comprise many segments of coating connected in a grid-like manner to surround the plurality of cavities.
- the cavities are essentially voids that gas molecules can occupy without substantial movement.
- the shape of the cavities is not critical.
- the cavities may be in the form of honeycombs, circles or any other shapes that produces a plurality of three-dimensional gas-filled voids between the two substrates and segments of coating between the voids.
- Figure 1 illustrates a portion of a laminate having a plurality of circular-shaped cavities and a non-uniform and patterned coating layer that contacts about 30% or less of at least one of inner surface of the substrates.
- the coating layer has a thickness of about 0.010 inches or less, about 0.005 inches or less, or about 0.001 inches or less. It is desirable to form a coating layer having such a small thickness and to use a low or non-conductive coating composition to minimize conductive heat transfer.
- the non-uniform coating layer is distributed across a majority of the substrates and forms a pattern that contacts about 30% or less of at least one inner surface of the substrates, about 20% or less of at least one inner surface of the substrates, or about 10% or less of at least one inner surface of the substrates (in other words, the cavities/voids contact about 70% or more, about 80% or more, or about 90% or more of at least one inner surface of the substrates).
- the non-uniform coating layer at these small thicknesses helps produce a plurality of sealed three-dimensional cavities each having a very small volume with a small amount of gas molecules therein. Since there is a small amount of gas molecules in each cavity, convective heat transfer between the substrates is minimized thereby minimizing heat loss through the laminates into the surrounding environment.
- the cavities essentially act as thermal insulators.
- the gas can be air or an inert gas. In some embodiments, there is a partial or complete vacuum in the cavities. In other embodiments, there is no vacuum.
- the present disclosure also relates to light diffusers that thermally insulate functional components, such as LED's, cameras, lighting assemblies, wiring, sensors and semiconductor components, in or near heated cavities.
- the light diffuser comprises a thermally insulating glass laminate described herein.
- the light diffuser may have a thermally insulating glass laminate located between the oven cavity and the functional element so that the laminate partially or completely insulates the functional element from the temperature within the cavity.
- a heat reflective coating is provided on one or more components of the laminate to provide additional heat insulation.
- the thermally insulating laminates disclosed herein are visibly transparent, similar to a window or a site glass, since they do not significantly distort the image of the element behind the laminate.
- the laminates can be used as light diffusers to thermally insulate functional elements in or near an oven for example while also providing sufficient transmission of visible light to permit a camera or other functional element to view the contents of the cavity through the laminate.
- the light diffusers and functional elements can be located anywhere within the heated cavity, such as at the rear, side or top for example.
- the light diffuser is parallel to one of the six sides of the oven cavity, such as within the perimeter of such side, in a similar manner to an oven window in the front door of an oven, so that the light diffuser is located between the center of the oven cavity and the functional element.
- FIG 3 a schematic of an oven interior 100 comprising laminate 10, which shields functional component 50.
- laminate 10 is parallel to and adjacent to one of the sides of interior 100, and shields component 50 from heat.
- other locations for laminate 10 and component 50 are contemplated by the present disclosure.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019542424A JP7060604B2 (en) | 2017-02-06 | 2018-02-05 | Insulated glass laminate with non-uniform coating layer and sealed cavities of gas molecules |
KR1020197025934A KR102484827B1 (en) | 2017-02-06 | 2018-02-05 | Insulating glass laminate with a non-uniform coating layer and a plurality of gas molecule sealing cavities |
MX2019008562A MX2019008562A (en) | 2017-02-06 | 2018-02-05 | Thermally insulating glass laminates with a non-uniform coating layer and sealed cavities of gas molecules. |
CN201880010419.1A CN110248801A (en) | 2017-02-06 | 2018-02-05 | The heat-protecting glass laminate of gas molecule cavity with non-uniform coating and multiple sealings |
EP18747945.6A EP3576941A4 (en) | 2017-02-06 | 2018-02-05 | Thermally insulating glass laminates with a non-uniform coating layer and sealed cavities of gas molecules |
BR112019016246-1A BR112019016246B1 (en) | 2017-02-06 | 2018-02-05 | THERMALLY INSULATING GLASS LAMINATES, METHODS OF FORMING A LAMINATE AND FURNACE |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/425,604 | 2017-02-06 | ||
US15/425,604 US10421252B2 (en) | 2017-02-06 | 2017-02-06 | Thermally insulating glass laminates with a non-uniform coating layer and a plurality of sealed cavities of gas molecules |
US201762489820P | 2017-04-25 | 2017-04-25 | |
US62/489,820 | 2017-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018145014A1 true WO2018145014A1 (en) | 2018-08-09 |
Family
ID=63040124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2018/016881 WO2018145014A1 (en) | 2017-02-06 | 2018-02-05 | Thermally insulating glass laminates with a non-uniform coating layer and sealed cavities of gas molecules |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3576941A4 (en) |
JP (1) | JP7060604B2 (en) |
KR (1) | KR102484827B1 (en) |
CN (1) | CN110248801A (en) |
MX (1) | MX2019008562A (en) |
WO (1) | WO2018145014A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020234103A1 (en) | 2019-05-21 | 2020-11-26 | Bayer Aktiengesellschaft | Identification and use of kras inhibitors |
WO2023152255A1 (en) | 2022-02-10 | 2023-08-17 | Bayer Aktiengesellschaft | Fused pyrimidines as kras inhibitors |
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- 2018-02-05 JP JP2019542424A patent/JP7060604B2/en active Active
- 2018-02-05 KR KR1020197025934A patent/KR102484827B1/en active IP Right Grant
- 2018-02-05 CN CN201880010419.1A patent/CN110248801A/en active Pending
- 2018-02-05 WO PCT/US2018/016881 patent/WO2018145014A1/en active Application Filing
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US20030044579A1 (en) * | 2001-08-25 | 2003-03-06 | Nelson Bolton | Anti-spalling laminated safety glass |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020234103A1 (en) | 2019-05-21 | 2020-11-26 | Bayer Aktiengesellschaft | Identification and use of kras inhibitors |
WO2023152255A1 (en) | 2022-02-10 | 2023-08-17 | Bayer Aktiengesellschaft | Fused pyrimidines as kras inhibitors |
Also Published As
Publication number | Publication date |
---|---|
KR102484827B1 (en) | 2023-01-04 |
EP3576941A4 (en) | 2020-12-09 |
EP3576941A1 (en) | 2019-12-11 |
CN110248801A (en) | 2019-09-17 |
KR20190116354A (en) | 2019-10-14 |
BR112019016246A2 (en) | 2020-04-14 |
JP7060604B2 (en) | 2022-04-26 |
JP2020507544A (en) | 2020-03-12 |
MX2019008562A (en) | 2019-11-21 |
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