WO2018166869A1 - Système de transmission de chaleur - Google Patents

Système de transmission de chaleur Download PDF

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Publication number
WO2018166869A1
WO2018166869A1 PCT/EP2018/055625 EP2018055625W WO2018166869A1 WO 2018166869 A1 WO2018166869 A1 WO 2018166869A1 EP 2018055625 W EP2018055625 W EP 2018055625W WO 2018166869 A1 WO2018166869 A1 WO 2018166869A1
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WIPO (PCT)
Prior art keywords
coating composition
μιη
coating
range
layer
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Application number
PCT/EP2018/055625
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English (en)
Inventor
Peter Knudsen
Original Assignee
K&F Industrial Coating Ivs
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Filing date
Publication date
Application filed by K&F Industrial Coating Ivs filed Critical K&F Industrial Coating Ivs
Publication of WO2018166869A1 publication Critical patent/WO2018166869A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints

Definitions

  • the present invention relates in general to a coating composition, a method for coating a material and a coated material as such.
  • the present invention relates to a coating composition, a method for coating a material and a coated material as such for improving the energy transmission from a material surface.
  • Radiant heat is invisible electromagnetic infrared radiation (IR) that heats objects in direct pathway of the IR rays which objects absorbs the energy immediately. Once the objects heat up, they radiate heat to other objects.
  • IR electromagnetic infrared radiation
  • Radiant heat constitutes a considerable part of heat transfer from one object to another.
  • radiant heat constitutes more than 60% and hence makes a larger heat contribution than the convection heat.
  • it is of interest to adapt a material surface for absorbing the emitted IR radiation, e.g. from an oven wall.
  • WO 2009/000272 describes a foil providing an improved heat transmission based on electromagnetic radiation, which foil has at least two coating layers, said at least two coating layers of the foil comprise a radiation-absorbing layer, e.g. carbon black, and a heat transmission layer, e.g. T1O2, wherein the wavelength spectre of the electromagnetic radiation of the radiation-absorbing layer and/or the heat transmitting layer, and the wavelength spectra of the electromagnetic radiation of the oven cavity are attuned to each other.
  • the coating layers comprises an organic binder such as acryl styrene polymer or nitrocellulose and are applied to the foil in a thin layer, below 14 ⁇ , by printing technology to obtain a desired thin coating layer.
  • an improved coating composition and method for applying the coating composition to a material would be advantageous, also obtaining a more efficient, stable, reliable, durably coating layer and a method of application of a coating composition resulting in less cracks and more efficient transmission of energy would be advantageous for the further benefit of the environment and to save time.
  • an object of the present invention relates to a coating composition, and a method for applying the coating composition to a material and an obtained coated material, for improving the energy transmission from a material surface.
  • a coating composition according to the invention does not relate to coatings or coated objects suitable to be subjected to heating by microwaves, i.e. electromagnetic radiation having a wavelength ⁇ 1 mm (1000 ⁇ ).
  • the coatings and objects according to the present invention is directed to coatings and coated objects suitable to be heated by infrared radiation.
  • one aspect of the invention relates to a coating composition for improving the energy transmission from a material surface, the composition comprising a mineral and an organic solvent, wherein the solvent comprises a carbon group having 3-10 carbon atoms.
  • the coating composition may comprise one or more additives in small amounts.
  • the additives may comprise one or more components such as an emulsifier and/or a thickener and/or a fungicide or the like, or a combination of such components.
  • Each additive is normally added in an amount below 5 wt%, e.g. below 1 wt% or below 0.5wt% providing a desired consistence or color or other functionality of the coating.
  • a desired consistence may be determined by the method of application and a desired functionality may be determined by the intended use of the material to be covered by the coating.
  • the coating may be added a fungicide or a component reducing bacterial growth.
  • a coating composition improving energy transmission from a material surface subjected to heating by radiation in the infrared spectrum does not normally comprise or include an organic binder such as e.g. acryl styrene polymer or nitrocellulose.
  • a coating composition improving energy transmission from a material surface subjected to heating by radiation in the infrared spectrum does not comprise carbon black, e.g. the coating of the outer surface i.e. a surface facing away from the material to which the coating is applied, does not comprise carbon black, graphite or similar dark or black pigments.
  • a coating composition improving energy transmission from a material surface subjected to heating by radiation in the infrared spectrum does not comprise a carboxyl vinyl polymer.
  • a coating composition improving energy transmission from a material surface subjected to heating by radiation in the infrared spectrum does not comprise a susceptor material in particulate form i.e. as powders or flakes or the like; where a "susceptor material" is defined as a conductive material such as nickel, antimony, copper, molybdenum, bronze, iron chromium, tin, zinc, silver, gold, alloys of metal, graphite, or a semi-conductive material such as silicon carbides or metal oxides.
  • a susceptor material is defined as a conductive material such as nickel, antimony, copper, molybdenum, bronze, iron chromium, tin, zinc, silver, gold, alloys of metal, graphite, or a semi-conductive material such as silicon carbides or metal oxides.
  • step (iii) applying the coating composition of step (ii) to the material of step (i)
  • Yet another aspect of the present invention relates to a coated material obtainable by a method according to the present invention.
  • Still another aspect of the present invention relates to a material or component having an energy transmitting coating on at least one material surface, wherein the energy
  • transmitting coating comprises a mineral and a coating layer thickness of at least 15 ⁇ , when in dried state.
  • Foil - a metal or similar material hammered or rolled into a thin flexible sheet, often used for covering or wrapping food, a common example is aluminium foil or as a flexible tray.
  • Layer or coating may be used interchangeably and may both refer to a layer of coating or a coating layer.
  • Sheet or sheet-like - a portion of something e.g. a material that is thin in comparison to its length and breadth.
  • Infrared radiation - Radiation is called “infrared (IR)" when the radiation has a wavelength spectrum between 750 nm - 1 mm (0.750 ⁇ - 1000 ⁇ ) whereas “microwave” radiation has a wavelength spectrum between 1000 ⁇ and 1 m.
  • IR infrared
  • Carbon group - that a solvent or carrier used to prepare a coating composition according to the invention comprises a carbon group having 3-10 carbon atoms means that the solvent is constituted of molecules comprising 3-10 carbon atoms.
  • Controlling and optimising the heat transmission from different materials has gained more and more interest over the years as there have been an increasing demand for heat transmission and at the same time an increasing requirement to reduce the costs and the effect on the environment.
  • the inventor of the present invention surprisingly found a method for applying a coating composition to the surface of a material resulting in an improved energy transmission from a material surface as well as a new coating composition for obtaining the desired effects.
  • a preferred embodiment of the present invention relates to a coating composition for improving the energy transmission from a material surface, the composition comprising a mineral and an organic solvent, wherein the solvent comprises a carbon group having 3-10 carbon atoms.
  • the coating composition according to the present invention comprises a solvent having a carbon group having 3-10 carbon atoms.
  • the coating layer should preferably be thick, e.g. in the range of 15-1000 ⁇ , when dried and in a state of ready-to-use.
  • the advantage of this thick layer of the coating is in addition to improved effect in energy transmission, speed of energy transmission, that the coated material may have no or less cracks than coated materials provided with thin coating layers as described in the prior art, where the coating composition is applied using printing technologies.
  • a coating composition according to the present invention is not normally applied using printing technologies.
  • the vaporization of the solvent may preferably not be too fast as seen with the vaporization of the solvents used in the prior art. Therefore, it is of interest of the present invention to slow down vaporization of the solvent.
  • the actual duration of the drying time or vaporization may be determined by a skilled person and will depend on the thickness of the coating composition, the composition of the coating composition and possibly the particle size distribution of the composition, and the solvent used in the coating composition. The duration of the drying may be controlled by controlling the temperature and the ventilation.
  • the mineral may be a white to pale grey or colourless mineral.
  • the mineral is a white to pale grey or colourless mineral, and selected from the group CaSC , MgCC , S1O2, T1O2 or a mixture hereof.
  • the white to pale grey or colourless mineral is T1O2.
  • a coating composition according to the invention may further comprise flakes or particles of a good reflective material such as aluminium or silver.
  • a good reflective material means that the flakes or particles has a high reflectance of infrared radiation.
  • the flakes or particles may have a maximum dimension of at least 50 nm, or at least 100 nm, or at least 200 nm, or at least 300 nm, or at least 400 nm, or at least 500 nm (0.500 ⁇ ), or at least 0.7 ⁇ , or at least 1 ⁇ , or at least 1.5 ⁇ , or the maximum dimension of the flakes or particles are in the range of 0.050-3 ⁇ , or the range of 0.100-3 ⁇ , or in the range of 0.500-3 ⁇ , or in the range of 1-3 ⁇ .
  • the "maximum dimension" of a flake or particle is defined as the dimension, whether this is the length, height, width, obtaining the largest length measurement.
  • the term "white to pale grey or colourless mineral” relates to a mineral mainly having energy transmitting activities and such mineral may also provide a more attractive and aesthetical surface of a coated material.
  • the white to pale grey or colourless mineral is suitable for being coated as an energy transmitting layer.
  • energy transmitting activities relates to a coating introduced for improving the effect of transmitting energy, some adsorption of energy may occur, but the primal function relies in transmitting energy.
  • the mineral may be a dark mineral such as carbon black or graphite.
  • the dark mineral is carbon black.
  • the term “dark mineral” relates to a mineral mainly having energy adsorbing activities and suitable for being coated as an energy absorbing layer.
  • the term “energy adsorbing activities” relates to a coating introduced for improving the effect of adsorbing energy, some transmission of energy occurs but the primal function relies on adsorbing energy.
  • the solvent and/or the coating composition is in liquid form or in the form of aerosols before and during application i.e. generally when in a ready-to-use-state.
  • the mineral may be a solid material which may be suspended in the solvent, providing a slurry of the mineral in the solvent.
  • a polymeric resin may be dissolved in the solvent.
  • the polymeric resin may provide a matrix holding and distributing the mineral in the solvent and on a surface of a material after drying, also the polymeric resin may act as a dispersing agent.
  • the polymeric resin may be an acrylic resin such as polyether tetra-acrylate.
  • the mineral has an average particle size in the range of 50-500 nm, such as in the range of 100-400 nm, e.g. in the range of 200-300 nm, such as about 280 nm.
  • the coating composition may be provided in two forms, (1) a stock composition for storage, and (2) a ready-to-use composition.
  • the coating composition comprises a white to pale grey or colourless mineral and during storage the coating composition may have a dry matter content in the range of 40-65% (w/w), such as in the range of 45-60% (w/w), e.g. in the range of 50-54% (w/w) or wherein the coating composition during application, i.e. when in a ready-to-use composition, has a dry matter content in the range of 20-50% (w/w), such as in the range of 25-45% (w/w), e.g. in the range of 30-40% (w/w), such as about 35% (w/w).
  • the coating composition comprises a dark mineral and during storage the coating composition may have a dry matter content in the range of 15-45% (w/w), such as in the range of 20-40% (w/w), e.g. in the range of 24-30% (w/w) or wherein the coating composition, during application, ready to use composition, may have a dry matter content in the range of 10-35% (w/w), such as in the range of 12-30% (w/w), e.g. in the range of 15-25% (w/w), such as about 19% (w/w).
  • the coating compositions for storage may be diluted, preferably with the same solvent as originally used to provide a ready-to-use composition. This, dilution may be in a ratio (vol/vol) of coating composition to solvent of at least 2: 1, such as at least 3: 1, e.g. at least 4: 1, such as at least 6: 1, e.g. at least 8: 1, such as at least 10: 1, e.g. at least 15: 1.
  • the solvent may be a polar solvent or a combination of polar solvents.
  • the solvent may be a polar protic solvent or a combination of polar protic solvents.
  • the solvent is a combination of at least 2, possibly 2-5 polar or polar protic solvents.
  • At least one carbon group of the solvent comprises at least one oxygen group, preferably an alcohol and/or a ketone of said carbon group.
  • the carbon group may be a straight carbon chain, a branched carbon chain or a cyclic carbon chain.
  • the carbon group may be propane, propanol, isopropanol, isopropylalcohol, butane, butanol, isobutanol, butyl acetate, isobutyl acetate, tert-butyl acetate, ethyl acetate, propyl acetate, butyl acetate, sec-butyl acetate, alkane-propyl acetate, such as ethoxy-propyl acetate or methoxy-propyl acetate, or a combination hereof.
  • the solvent has a vaporization temperature or a boiling point of 85°C or above, such as 90°C or above, e.g. 95°C or above, such as 100°C or above, e.g. 105 °C or above, such as 110°C or above, e.g. 115°C or above, such as 120°C or above, e.g. 125 °C or above.
  • the solvent is an organic solvent or a mixture of organic solvents
  • the solvent is an acetate or a mixture of acetates or comprise at least one acetate or at least two acetates.
  • One acetate solvent may comprise more than one acetate-group.
  • the solvent or mixture of solvents has a vaporization temperature or a boiling point of 85°C or above, such as 90°C or above, e.g. 95°C or above, such as 100°C or above, e.g. 105°C or above, such as 110°C or above, e.g. 115°C or above, such as 120°C or above, e.g. 125 °C or above.
  • the solvent or mixture of solvents has a vaporization temperature or a boiling point of 210°C or below, such as below 200°C, or below 180°C, or below 160°C or even below 130°C.
  • the solvent may be a mixture of ethyl acetate (boiling point approximately 77°C) and propyl acetate (boiling point approximately 102°C).
  • the propyl acetate makes up at least 40% of the mixed solvent, such as at least 50%, e.g. at least 60%, such as at least 75%, e.g. at least 90%.
  • propyl acetate makes up 70-90% (such as about 80%) of the mixed solvent and ethyl acetate makes up 10-30% (such as about 20%) of the mixed solvent.
  • the coating composition may preferably be used in a method for providing a material having an improved energy transmission of the material surface, the method comprises the steps of
  • step (iii) applying the coating composition of step (ii) to the material of step (i)
  • the coating composition may be applied to the material in step (iii) by spraying, by dipping or by painting or a similar method where a desired thickness of the coating composition may be obtained.
  • the heat transmission of the material may be further improved by providing a duplex coating of the material surface.
  • Such duplex coating of the material surface may be provided by coating both an energy absorbing layer and an energy transmitting layer on a material surface.
  • the total thickness of a duplex layer may be at least 15 ⁇ in dried state, i.e. the total thickness of both layers of a duplex layer may be at least 15 ⁇ in dried state.
  • at least one layer of a duplex coating normally the outer or upper layer of the duplex coating - i.e. the layer furthest away from the material to be coated - has a thickness of at least 15 ⁇ , or possibly each layer of a duplex layer has a thickness of 15 ⁇ resulting in a total thickness of the duplex layer of at least 30 ⁇ .
  • the material surface may be further coated with an energy absorbing layer.
  • an energy absorbing layer comprising one or more dark minerals a duplex coated material surface may be provided.
  • the one or more dark minerals may be carbon black.
  • an energy absorbing layer may be a bottom layer (coated directly on or closest to the material surface) and an energy transmitting layer may be a top layer (coated on top of the energy absorbing layer).
  • an energy absorbing layer may be coated on one side of the material surface and an energy transmitting layer may be coated on the other side of the material surface, preferably located opposite to the energy adsorbing layer when the material is a sheet of material and at least thin enough to allow heat to be transferred from one side of the material to the opposite side of the material.
  • transmitted energy may be in form of heat convection and/or radiation, in particular, electromagnetic radiation.
  • the coated material obtained by the present invention or the method described may have less cracks, be more efficient in transmitting energy and further benefit from faster heating of an object in contact with or covered by the coated material, thus save time during use, longer shelf-life of the material being coated and/or positive implications on the environment relative to the traditionally used and described coated materials.
  • a preferred embodiment of the present invention may be a material having an energy transmitting coating on at least one material surface, wherein the energy transmitting coating comprises a mineral and a coating layer thickness of at least 15 ⁇ , when the coating layer is in dried state.
  • a coating layer thickness e.g. of an energy transmitting coating, of a energy absorbing layer or of a duplex coating
  • a coating layer thickness may be in the range of 15-1000 ⁇ , when in dried state, such as in the range of 16-750 ⁇ , e.g. in the range of 17-500 ⁇ , e.g. in the range of 18-400 ⁇ , such as in the range of 19-300 ⁇ , e.g. in the range of 20-200 ⁇ , e.g. in the range of 25-150 ⁇ , such as in the range of 30-100 ⁇ , e.g. in the range of 40-75 ⁇ .
  • the material may be further provided with an energy absorbing layer.
  • the energy absorbing layer may be applied with a coating comprising or consisting of a temperature resistant organic matrix.
  • the coating may be applied as a duplex coating.
  • the bottom layer may be the energy absorbing layer and the uppermost layer may be the energy transmitting coating.
  • the coating composition may be designed in such a manner that the wavelengths from the radiation-emitting or energy emitting surface (e.g. the oven wall) and the energy absorbing surface (a coated material surface of e.g. a foil) match.
  • the wavelength spectra of the electromagnetic radiation of the one surface is attuned to that of the other surface, whereby e.g. the oven surface efficiently transmit the radiant heat to the coated material and any product covered or in contact with the coated material.
  • the advantage thus obtained may be that of using a material able to absorb radiation with an electromagnetic wavelength spectrum that is comprised e.g. within the lower half of an interval along with another material able to absorb radiation with an electromagnetic wavelength spectrum that is within e.g. the upper half of the interval in order to thereby accomplish a surface on the material that has an electromagnetic wavelength spectrum that uses all of this interval to advantage.
  • an embodiment of the present invention relates to a material comprising a coating comprising or constituted of an energy transmitting coating transmitting radiation at a wavelength spectrum attuned to that of a heat source, e.g. the wavelength spectrum of the electromagnetic radiation of an oven.
  • the energy transmitting coating may be selected to be such that it reduces reflected radiation from the subjacent energy absorbing coating.
  • the energy absorbing coating may have a wavelength spectrum of an electromagnetic radiation which may be within the interval of 2500 - 10000 nm.
  • the energy absorbing coating has a wavelength spectrum of an electromagnetic radiation which may be within the interval 8000 - 10000 nm.
  • the material according to the present invention may be a material where it is of interest to direct energy, e.g. heat, from one side of the material to another side, either for heating the material or a product being covered or in contact with the material or for transporting heat across the material, e.g. to the air, in order to cool the material, extending shelf-life of the material.
  • the material may be a flexible material or an inflexible material.
  • the material may be of metal, plastic, polymer, paper, cardboard or other materials that are based on wood.
  • the material may be formed as a flexible or non-flexible sheet i.e. be sheet-like, or as a plate where the distance between a first and a second opposite side is considerably smaller than the length or width of the material, the flexible sheet-like material may be a foil or the like and the inflexible sheet-like material may be a baking mold or a dish or a plate or the like.
  • the material may also be formed as a more voluminous and inflexible component from which surface heat is released or received, e.g. a box-like structure, a radiator, a motor block or the like.
  • the material may be constituted of or comprising a material having a relatively high thermal conductivity able to transport heat from one surface of the material to another surface, i.e. through the material.
  • the material may e.g. be constituted of a metal or a combination of metals, and may e.g. comprise aluminum having a thermal conductivity of 205 W/(m K), or the material may comprise or be constituted of one or a combination of materials or components resulting in a thermal conductivity of the material above 15 W/(m K).
  • the material comprises or is constituted of a sheet-like material
  • the material, the energy transmitting layer and/or the radiation absorbing layer may have a ductility of at least 5 %.
  • the surface of the material may be flexible, has high temperature resistance and high stability, which enables heating to 300°C for at least three hours without the material properties deteriorating significantly.
  • the material may be a foil, a metal tray, a baking tin, or an engine block.
  • a material and/or a coating composition e.g. for applying aluminum packaging or aluminum foils for primary use within the foodstuffs industry with a view to obtaining surfaces that have unique properties in respect of quick heating via IR radiation/radiant heat from hot surfaces in ovens.
  • the surface on the foil is made of materials that are to the widest extent possible capable of transmitting radiation from an internal part of a hot surface of an oven to an outer surface of a product covered by or in contact with the foil.
  • the term "energy transmission system” relates to the combination of the material (the coated material) according to the present invention and an energy source, such as a heating source or the surface of a heating source, e.g. an oven.
  • the energy transmission system is configured such that the wavelength of an IR-absorbing surface (a radiation adsorbing surface) is adapted to or matches the IR-radiation that is emitted from an energy source, e.g. the internal surface of an oven.
  • an energy source e.g. the internal surface of an oven.
  • a coating is thus concerned that emits IR radiation with the highest intensity within the range 8000 - 10000 nm.
  • the coated material according to the present invention is thus capable of primarily absorbing radiation of the same wavelength if the energy via radiant heat is to be performed quickly and efficiently.
  • the energy is subsequently transmitted to the product, e.g. a ready to eat dish covered by a material, e.g. a foil or the like, coated according to the present invention.
  • the mineral selected may be selected according to their ability to absorb the energy (e.g. by IR radiation) at a given wavelength spectrum that characterizes the energy from the energy source, e.g. radiation from a hot oven wall.
  • the coating composition according to the present invention as a sandwich layer, where a first layer is configured for absorbing the IR-radiation and a second layer is configured for reflecting the energy, e.g. produced by radiation and emitted from a heated product wrapped in the foil, the heat from the product is thus reflected to the product.
  • the coating composition on the material when used for food products may preferably not have toxic or hazardous properties and it should preferably also be thermally stable up to 300°C, have a thickness above 15 ⁇ and exhibit sufficient mechanical properties in the application situation. What is intended by this is the usual way in which the material, such as alu-foil, is handled in an in- use situation.
  • the surface of the material e.g. the foil, may be provided with a top coating that reduces the reflection of energy, such as IR radiation, from the surface and at the same time allows the energy, such as IR radiation to pass. Utilization of such duplex coatings may show to provide surprising measurement results that have given better values than the well-known "carbon black" surface mentioned above.
  • the coated material according to the present invention comprises at least two layers, wherein the wavelength spectrum of the transmission energy, such as the electromagnetic radiation, of the coated material, e.g. a foil, may be attuned to that of an energy source, e.g. the wavelength spectrum of the electromagnetic radiation of an oven.
  • the wavelength spectrum of the transmission energy such as the electromagnetic radiation
  • the coated material e.g. a foil
  • the material may have an energy adsorbing layer and/or an energy transmitting layer that may be applied as a coherent layer or layers onto the surface of the material.
  • an energy transmitting layer may be chosen such that it reduces reflecting radiation from a subjacent, energy absorbing layer.
  • a coating composition is prepared by mixing 10-20 grams of polymeric resin with 40 -60 grams with a mixture of organic solvents.
  • the mixture of organic solvents will comprise 2-3 solvents chosen amongst butyl acetate, isobutyl acetate, tert-butyl acetate, ethyl acetate, propyl acetate, butyl acetate, sec-butyl acetate, alkane-propyl acetate such as ethoxy-propyl acetate or methoxy-propyl acetate, propane, propanol, isopropanol, isopropylalcohol, butane, butanol and isobutanol.
  • the polymeric resin is in form of a colorless powder which is soluble in the mixture of organic solvents.
  • the polymeric resin may be an acrylic resin or a polyester resin or another resin with similar functionality.
  • Polymeric resins and solvents are generally commercially available.
  • the polymeric resin powder is mixed with the solvents during stirring at room temperature for 40-90 minutes, normally 50-70 minutes. The stirring is vigorously and may be performed in a kettle with a high-speed disperser.
  • a liquid coating having a dry matter content of 20-50% w/w is obtained, and the coating has a viscosity of 100-200 mPas.
  • the coating is in a ready-to-use state and may be applied as a relatively thick layer i.e. a layer having a minimum thickness of 15 ⁇ to a material surface e.g. by spraying, dipping or painting.
  • Duplex systems have shown more efficient energy transmission properties. The reason for this may be found in the so-called internal reflection between the bottom layer coating and the top layer coating. By combining optimally matching bottom layer coatings with a top layer coating that improves the internal reflection, temperatures have thus been measured that are higher than those of single-layer "carbon black" on aluminum foil.
  • a duplex system with "carbon black” as a component in a bottom layer coating and T1O2 as a component in a top layer coating, it is thus possible to combine the good absorbing property of carbon black with the appearance of T1O2.
  • the IR radiation absorbing property is also improved since the total internal reflection within the coated material, between bottom layer and top layer, is improved due to the high refraction index of T1O2.
  • a coating composition may comprise an organic binder.
  • the organic binder may be selected from a group of compounds that is readily able to resist the achieved temperature.
  • the organic binder may be acryl styrene polymer and/or nitrocellulose or an organic binder having similar properties.
  • a combination of minerals may be used. In this way, the minerals may cooperate to enable energy absorption across a wider spectrum than if only one mineral was used.
  • the one mineral may e.g.
  • the combination of minerals comprises at least 2 different minerals, such as at least 3 different minerals, e.g. at least 4 different minerals, such as at least 5 different minerals, e.g. at least 6 different minerals.
  • different minerals relates to a composition of minerals having difference in maximum energy absorption spectra allowing a coating to cover good energy absorption properties within a wider range of wavelengths, than a composition only comprising a single mineral.
  • the advantage may be cashed in on that it is possible to employ a mineral with an electromagnetic wavelength spectrum that is e.g. within the lower half of an interval along with another mineral with an electromagnetic wavelength spectrum that is e.g. within the upper half of the interval in order to achieve a surface on a material, e.g. the foil, that has an electromagnetic wavelength spectrum that utilizes the entire interval.
  • a mineral with an electromagnetic wavelength spectrum that is e.g. within the lower half of an interval along with another mineral with an electromagnetic wavelength spectrum that is e.g. within the upper half of the interval in order to achieve a surface on a material, e.g. the foil, that has an electromagnetic wavelength spectrum that utilizes the entire interval.

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

La présente invention concerne en général une composition de revêtement, un procédé de revêtement d'un matériau et un matériau revêtu ainsi. En particulier, la présente invention concerne une composition de revêtement, un procédé de revêtement d'un matériau et un matériau revêtu ainsi pour améliorer la transmission d'énergie à partir d'une surface de matériau. La composition de revêtement selon l'invention améliore la transmission d'énergie à partir d'une surface de matériau soumise à un chauffage par rayonnement dans le spectre infrarouge. La composition de revêtement, avant d'être appliquée à la surface de matériau, c'est-à-dire lorsqu'elle est dans un état prêt à l'emploi, comprend, ou est constituée d'un minéral dissous ou suspendu dans un solvant ou un support organique, et le solvant ou le support comprend un groupe de carbone ayant de 3 à 10 atomes de carbone. Le minéral peut être blanc à gris clair ou incolore, choisi par exemple dans le groupe CaSO4, MgCO3, SiO2, TiO2 ou un mélange de ceux-ci, de préférence du TiO2.
PCT/EP2018/055625 2017-03-17 2018-03-07 Système de transmission de chaleur WO2018166869A1 (fr)

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DKPA201700184 2017-03-17
DKPA201700184 2017-03-17

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CN109857415A (zh) * 2019-03-01 2019-06-07 广东盈科电子有限公司 一种烧录装置及其参数自动选择烧录方法

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WO2014178798A1 (fr) * 2013-05-02 2014-11-06 Tera-Barrier Films Pte Ltd Empilement barrière d'encapsulation comprenant des nanoparticules encapsulées par des dendrimères
US20150185372A1 (en) * 2013-12-27 2015-07-02 Hon Hai Precision Industry Co., Ltd. Light reflective film and method for manufacturing the same

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US20130224476A1 (en) * 2012-02-29 2013-08-29 Liping Zheng Infrared radiation absorbing articles and method of manufacture
WO2014178798A1 (fr) * 2013-05-02 2014-11-06 Tera-Barrier Films Pte Ltd Empilement barrière d'encapsulation comprenant des nanoparticules encapsulées par des dendrimères
US20150185372A1 (en) * 2013-12-27 2015-07-02 Hon Hai Precision Industry Co., Ltd. Light reflective film and method for manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109857415A (zh) * 2019-03-01 2019-06-07 广东盈科电子有限公司 一种烧录装置及其参数自动选择烧录方法

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