WO2023111489A1 - Procede d'application d'une sous-couche polymere pour renforcer la resistance mecanique, notamment a la chaleur, de revêtements fluores - Google Patents
Procede d'application d'une sous-couche polymere pour renforcer la resistance mecanique, notamment a la chaleur, de revêtements fluores Download PDFInfo
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- WO2023111489A1 WO2023111489A1 PCT/FR2022/052409 FR2022052409W WO2023111489A1 WO 2023111489 A1 WO2023111489 A1 WO 2023111489A1 FR 2022052409 W FR2022052409 W FR 2022052409W WO 2023111489 A1 WO2023111489 A1 WO 2023111489A1
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1693—Antifouling paints; Underwater paints as part of a multilayer system
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
- C08L81/02—Polythioethers; Polythioether-ethers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/025—Vessels with non-stick features, e.g. coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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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
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
- C09D181/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
- C09D181/02—Polythioethers; Polythioether-ethers
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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
- C09D181/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
- C09D181/06—Polysulfones; Polyethersulfones
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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
- C09D5/002—Priming paints
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type polymers
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling agents
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J181/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Adhesives based on polysulfones; Adhesives based on derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
- B05D5/086—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers having an anchoring layer
Definitions
- the invention applies to the field of non-stick coatings for the cooking surface of cookware and electric cooking appliances.
- Cookware coated with PTFE polytetrafluoroethylene
- PTFE polytetrafluoroethylene
- thermoplastics with high thermal resistance and a high melting point, such as polyaryletherketones and in particular oxy-1,4-phenylenephenylene-oxy-1,4-phenylene-carbonyl-1,4- phenylene or PEEK or else phenylene sulphides.
- the PEEK polymer is interesting in cookware since it has a high melting point (343°C) and excellent thermal stability under conditions of use at 260°C.
- the following coating techniques can be carried out to obtain an undercoat from this type of polymer: spray coating, roller coating, curtain coating, pad printing, screen printing, thermal spraying, electrostatic spraying, inkjet .
- an underlayer composed solely of PEEK (with particle sizes between 5 ⁇ m and 100 ⁇ m, and with a d50 preferably of 20 ⁇ m) deposited on a metal substrate, with a covering of between 60% and 95% of the surface of the article, then covered with a mono- or multi-layer non-stick coating, based on fluorinated resins and fluorinated copolymers.
- the PEEK underlayer is deposited either by pad printing or screen printing, or by spraying in the form of a dispersion.
- This PEEK layer is between 5 ⁇ m and 100 ⁇ m.
- the disadvantage of the process as described is that it imposes a double curing of the PEEK-based fluorinated coating.
- the first curing requires a temperature above the melting point of the polymer making up the underlayer (i.e. between 380 and 400°C for PEEK) in order to allow it to adhere to the metal substrate.
- the article must then be strongly cooled, which is very costly in time and energy, but essential in order to be able to apply the successive fluorinated layers which will be sintered during a second firing at high temperature (> 420° C).
- a hard underlayer is described forming a continuous network, deposited discontinuously on the inner bottom of the cookware.
- the material making up this layer is a ceramic (alumina-titanium mixture) or a metal or a polymer (PAI, PEI, PI, PES, PPS, PEK or PEEK).
- the surface of the cookware covered by this material is between 30% and 80% and the dimension between the drops deposited is between 2 ⁇ m and 50 ⁇ m.
- the surface of this hard layer has a roughness with an Ra of 2 ⁇ m to 12 ⁇ m, preferably 4 ⁇ m to 8 ⁇ m.
- This material is sprayed by a Flame Spray process in powder form with a particle size preferably between 20 ⁇ m and 45 ⁇ m.
- the underlayer is composed of a mixture of P ⁇ I, PEEK and PTFE such that the PTFE is between 9 to 15%/w and the P ⁇ I resin is between 4 to 5%/w.
- the content of PEEK in dry matter in the final fluorinated film is of the order of 0.12% to 1.1%/p, preferably from 0.12% to 0.9%/p.
- PEEK powder has a D50 particle size of 5 to 35 ⁇ m.
- the first coating layer contains fluorinated resins.
- This liquid coating is deposited by spray.
- Upper layers of fluorinated coatings also containing one or more primers are then deposited by spray. The sintering of all these layers is carried out in a single firing at 400 to 420°C.
- the disadvantage of this application method is that the level of PEEK resin in the first layer is very low and does not achieve sufficient mechanical performance to have an anti-scratch coating.
- This primer which contains at least 50% PEEK, may also contain a mixture with other pure or mixed thermostable resins such as polyphenylene sulfide (PPS), polyetherimide (PEI), polyimide (PI), polyetherketone (PEK), polyethersulfone (PES), polyamideimide (PAI). It may also contain fillers chosen from metal oxides: silica, mica, or lamellar fillers. It does not contain any fluorinated resin.
- PPS polyphenylene sulfide
- PEI polyetherimide
- PI polyimide
- PEK polyetherketone
- PES polyethersulfone
- PAI polyamideimide
- the first firing is carried out at a high temperature of at least 260°C, preferably greater than or equal to 340°C to melt the PEEK.
- the PEEK is in the form of a powder, the particle size of which is between 4 ⁇ m and 80 ⁇ m, with a d50 of preferably 20 ⁇ m.
- the thickness of this underlayer is between 5 ⁇ m and 100 ⁇ m.
- This liquid coating is deposited by spray. Upper layers of fluorinated coatings or even primers with fluorinated topcoats are then deposited by spray. The sintering of all these layers is carried out in a second firing to sinter the fluorinated coating, between 400° C to 420° C.
- a scratch-resistant fluorinated coating is mentioned, the first layer of which contains at least 50% by weight of PEEK (preferably between 60% and 95%), mixed with a thermostable polymer resin such as PPS, PEI, PI, PAIs and mixtures thereof and fillers such as metal oxides, silica, micas, and in the absence of any fluorinated resin.
- This first layer has a thickness of between 5 and 100 ⁇ m.
- PEEK is a powder with a particle size of 4 ⁇ m to 80 ⁇ m with a d50 of the order of 20 ⁇ m.
- the process for obtaining such a coating necessarily involves double firing/sintering between 400 and 420°C.
- cooking article By the expression “cooking article”, it is necessary to understand, within the meaning of the present invention, an object intended for cooking.
- Cookware within the meaning of the present invention includes objects intended to be heated in order to cook or reheat food carried by the cooking element or contained in the cooking element and electrical cooking appliances.
- object intended to be heated to cook or heat the food carried by the cooking element or contained in the cooking element it is necessary to understand, within the meaning of the present invention, an object which will be heated by an external heating system, such as a cooking hearth, and which is able to transmit the calorific energy provided by this external heating system to a material or food in contact with said object.
- an object may in particular be a frying pan, saucepan, sauté pan, skillet or fondue pot for fondue or raclette, stewpan, wok, sauté pan, crepe maker, pot, casserole dish, culinary mould.
- Such an object may in particular be a grill, a plancha, a cooker or bread machine tank, an electric crepe maker, an electric raclette device, an electric fondue device, an electric grill, an electric plancha, an electric cooker, a bread machine.
- This invention describes the manufacture of a cookware that is resistant to cold and hot scratching while being non-stick.
- the inventors have identified an optimal method for applying a tie underlayer and upper fluorinated layers comprising a single sintering step under standard conditions, which makes the method industrializable without additional investment.
- the upper fluorinated layers are applied by spraying with the obtaining of an excellent non-adhesiveness of the coating.
- the presence of reinforcing fillers (alumina, silicon carbide, etc.) is also possible in the fluorinated layers.
- the coating obtained is produced with one and the same sintering condition at 420-430° C. Excellent anti-scratch performance is obtained while keeping the cost of the coating at industrially acceptable prices.
- This type of coating makes it possible to significantly increase the scratch resistance of the coating both at room temperature and at high temperature (180°C) while minimizing process costs and maintaining excellent anti-adhesive properties and of membership.
- a first object of the invention relates to a method for applying a non-stick coating on a metal support comprising the following steps: i. Deposition on the metal support of one or more continuous layers of a tie sub-layer comprising one or more polymers chosen from the group consisting of polyaryletherketones (PAEK), polyethyleneimines (PEI), polyimides (PI ), polyamide imides (PAI) and polybenzymidazoles (PBI) in an amount of 20 to 95% by weight of the total weight of said underlayer, characterized in that it comprises only a single sintering step at a T°C > 400° C, and this of the whole, after the deposition of the different layers.
- PAEK polyaryletherketones
- PEI polyethyleneimines
- PI polyimides
- PAI polyamide imides
- PBI polybenzymidazoles
- a second object of the invention relates to a method of manufacturing a culinary item (1) characterized by the following steps: i. A step of supplying a metal support (2), comprising two opposite faces, ii. A step of shaping said support (2) to give it the shape of a cap, which comprises a bottom (211) and a side wall (212) rising from the bottom (211), and thus define a inner face (21) concave adapted to receive food and an outer face (22) convex, said step ii) being carried out either before step iv) of producing the grip sub-layer (3), or after the step v) of producing the non-stick coating, iii.
- a first object of the invention relates to a method for applying a non-stick coating on a metal support comprising the following steps: i. Deposition on the metal support of one or more continuous layers of a tie sub-layer comprising one or more polymers chosen from the group consisting of polyaryletherketones (PAEK), polyethyleneimines (PEI), polyimides (PI ), polyamide imides (PAI) and polybenzymidazoles (PBI) in an amount of 20 to 95% by weight of the total weight of said underlayer, characterized in that it comprises only a single sintering step at a T°C > 400° C, and this of the whole, after the deposition of the different layers.
- PAEK polyaryletherketones
- PEI polyethyleneimines
- PI polyimides
- PAI polyamide imides
- PBI polybenzymidazoles
- the method according to the invention does not include two sintering steps or two firing steps.
- the method according to the invention does not include three sintering steps or three firing steps.
- the process according to the invention comprises a single stage of cooking by sintering.
- the method of the invention comprises the next step after step i. before the sintering step: ii. Deposit of one or more layers of a non-stick coating based on one or more fluorocarbon resin(s), preferably two layers.
- said tie sub-layer comprises one or more aromatic polymer resins chosen from the group of polyphenylene sulphides (PPS) and polyether sulphones (PES), preferably from polyether sulphones (PES).
- PPS polyphenylene sulphides
- PES polyether sulphones
- PES polyether sulphones
- the polyaryletherketones is (are) chosen from the group consisting of: polyetherketones (PEK), polyetheretherketones (PEEK), polyetherketoneketones (PEKK), polyetheretherketoneketones (PEEKK) and polyetherketoneetherketoneketones (PEKEKK), so particularly preferred is (are) PEEKs.
- the polymer(s) is (are) chosen from the group consisting of polyaryletherketones (PAEK) and polyamide imides (PAI) and mixtures thereof.
- PAEK polyaryletherketones
- PAI polyamide imides
- the polymer(s) is (are) chosen from the group consisting of polyetheretherketones (PEEK) and polyamide imides (PAI) and mixtures thereof.
- said tie sub-layer comprises one or more fluorocarbon resin(s).
- the fluorocarbon resin(s) present in the tie sub-layer or in at least one of the other layers of the non-stick coating is/are chosen from the group consisting of: polytetrafluoroethylene (PTFE), copolymer of tetrafluoroethylene and perfluoro-propylvinylether (PFA), copolymer of tetrafluoroethylene and hexafluoropropylene (FEP) and mixtures thereof, particularly preferably comprise PTFE.
- PTFE polytetrafluoroethylene
- PFA perfluoro-propylvinylether
- FEP hexafluoropropylene
- the fluorocarbon or acrylic resin(s) represent from 0 to 30%, preferably from 0 to 15%, preferentially 0 to 5%, more preferentially 0 to 4%, in a particularly preferred manner from 0 to 3%, by weight of the total weight of the underlayer.
- the tie sub-layer does not comprise any fluorocarbon resin(s), in particular no PTFE.
- said tie sub-layer also comprises inorganic reinforcing fillers, preferably chosen from the group consisting of metal oxides, carbides, nitrides, preferably alumina, silicon carbides or fumed silica .
- said tie sub-layer further comprises one or more solvents, preferably polar aprotic, preferably unlabelled, for example N-formylmorpholine (NFM), N-Methyl Imidazole (NMI), N-ButylPyrrolidone (NBP) , dimethyl sulfoxide (DMSO), or alcoholics, for example Propylene Glycol (PPG), Diethylene glycol.
- solvents preferably polar aprotic, preferably unlabelled, for example N-formylmorpholine (NFM), N-Methyl Imidazole (NMI), N-ButylPyrrolidone (NBP) , dimethyl sulfoxide (DMSO), or alcoholics, for example Propylene Glycol (PPG), Diethylene glycol.
- solvents preferably polar aprotic, preferably unlabelled, for example N-formylmorpholine (NFM), N-Methyl Imidazole (NMI), N-Butyl
- said tie sub-layer also comprises one or more surfactants.
- said tie sub-layer also comprises one or more anti-foaming agents.
- said tie undercoat further comprises one or more pigments.
- the thickness of said tie sub-layer is between 10 and 100 ⁇ m, preferably between 20 and 80 ⁇ m, more preferably between 30 and 60 ⁇ m.
- said tie sub-layer comprises: a) between 20% and 80% by weight of the total weight of the sub-layer of one or more polymer(s) chosen from the group consisting of polyaryletherketones ( PAEK), polyethyleneimines (PEI), polyimides (PI), polyamide imides (PAI) and polybenzymidazoles (PBI), with a weight ratio PAEK: (PEI+PI+PAI+PBI) of between 1:1 and 15:1, b) at least 20%, preferably at least 25%, by weight of the total weight of the undercoat of one or more polymers selected from the group consisting of polyphenylene sulphides (PPS) and polyethersulfones (PES), c) less than 40%, preferably less than 30%, by weight of the total weight of the sub-layer of inorganic reinforcing fillers, preferably between 5 and 25% by weight, d) optionally a or more fluorocarbon or acrylic resin(s), e) optionally one or more pigments.
- PAEK
- the ratio by weight PAEK: (PEI+PI+PAI+PBI) is between 6:1 and 12:1.
- the ratio by weight PAEK: (PEI+PI+PAI+PBI) is between 12:1 and 15:1.
- the polymers b) represent 25 to 40% by weight of the total weight of the underlayer, preferably from 25 to 35%.
- the ratio by weight between the polymers a) and the polymers b) is advantageously between 2:5 and 2:3, preferably between 1:2 and 1:3.
- the pigment(s) e) represent less than 30%, preferably less than 20%, by weight of the total weight of the undercoat.
- the polymer(s) (b) is (are) one or more polyethersulfone(s) (PES).
- PES polyethersulfone
- parts (a) and (b) are a mixture consisting of the polymers PEEK, PAI and PES.
- said tie sub-layer comprises: a) between 20% and 80% by weight of the total weight of the sub-layer of one or more polymer(s) chosen from the group consisting of polyaryletherketones (PAEK), b) less than 20%, preferably less than 10% by weight of the total weight of the undercoat of one or more pigments, c) one or more fluorocarbon resin(s), preferably more than 25% by weight of the total weight of the underlayer.
- PAEK polyaryletherketones
- said tie sub-layer consists of: a) between 20% and 80% by weight of the total weight of the sub-layer of one or more polymer(s) chosen from the group consisting of polyaryletherketones (PAEK) , b) less than 20%, preferably less than 10% by weight of the total weight of the undercoat of one or more pigments, c) one or more fluorocarbon resin(s), preferably more than 25 % by weight of the total weight of the underlayer.
- PAEK polyaryletherketones
- said tie sub-layer comprises: a) more than 50% by weight, preferably more than 60% by weight of the total weight of the sub-layer of one or more polymer(s) chosen from the group consisting of polyaryletherketones (PAEK), preferably PEEK, b) less than 10% by weight of the total weight of the undercoat of one or more pigments, c) between 20% and 40% by weight, preferably between 30% and 40% by weight, of the total weight of the underlayer, of one or more fluorocarbon resin(s), preferably PTFE or a PTFE/PFA mixture.
- PAEK polyaryletherketones
- said tie sub-layer consists of: a) more than 50% by weight, preferably more than 60% by weight of the total weight of the sub-layer of one or more polymer(s) chosen from the group consisting of polyaryletherketones (PAEK), preferably PEEK, b) less than 10% by weight of the total weight of the undercoat of one or more pigments, c) between 20% and 40% by weight, preferably between 30% and 40% by weight, of the total weight of the underlayer, of one or more fluorocarbon resin(s), preferably PTFE or a PTFE/PFA mixture.
- PAEK polyaryletherketones
- said tie sub-layer consists of: a) more than 50% by weight, preferably more than 60% by weight of the total weight of the underlayer of one or more polymer(s) chosen from the group consisting of polyaryletherketones (PAEK), preferably PEEK, b) between 20% and 40% by weight, preferably between 30% and 40% by weight, of the total weight of the underlayer of one or more fluorocarbon resin(s), preferably PTFE or a PTFE/PFA mixture.
- PAEK polyaryletherketones
- the acrylic resin(s) is/are advantageously chosen from the group consisting of: polymers derived from emulsion polymerization of various monomers with other monomers based on acrylics.
- the organic or inorganic pigment(s) is/are chosen from the group consisting of pigment powders known to those skilled in the art in the field, for example titanium dioxide, carbon black , graphite, certain thermochromic pigments such as bismuth oxide, vanadium oxide or organic perylene pigments.
- the tie undercoat according to the invention is a mixture consisting of PEEK, PAI, PES, PTFE and optionally fillers, acrylic resins and pigments.
- said metal support is the cap of a cookware and said coating is applied to the surface in contact with food.
- said culinary article is a frying pan, a wok or a saucepan.
- said metal support is a single-layer support in aluminum or in aluminum alloy, in cast aluminum, in stainless steel, in cast steel or in copper, or a multi-layer support comprising from the outside towards the inside the following layers ferritic stainless steel/aluminum/austenitic stainless steel or even stainless steel/aluminum/copper/aluminum/austenitic stainless steel, or even a cap of cast aluminum, aluminum or aluminum alloys lined with a stainless steel exterior bottom.
- Said metal support (disk or shaped article) on which the undercoat of the grip according to the invention is applied may have a roughness obtained by sandblasting, shot-blasting, stamping, brushing or chemical attack.
- said adhesion sub-layer is deposited by spray, by coating, by screen printing or by roller.
- the sintering temperature is between 400° C. and 440° C.
- a second object of the invention relates to a method of manufacturing a culinary item (1) characterized by the following steps: i. A step of supplying a metal support (2), comprising two opposite faces, ii. A step of shaping said support (2) to give it the shape of a cap, which comprises a bottom (211) and a side wall (212) rising from the bottom (211), and thus define a concave inner face (21) adapted to receive food and a convex outer face (22), said step ii) being carried out either before step iv) of producing the grip sub-layer (3), or after step v) of producing the non-stick coating, iii.
- the metal support (2) from step i. is in disc form.
- Figure 1 shows a photograph of the HOT BLADE test. 3 rotating metal spikes on the coating of the inside of the cookware which is placed on a heat source.
- FIG. 2 represents a schematic view of a cookware according to the invention.
- This test method assesses the scratch resistance of a coating using a mobile system consisting of 3 hard points (ball point pens). This test, also called “tiger paw”, induces a rotation around its axis and describes an epicyclic movement on the coated surface. The test is carried out hot. The degradation of the coating (appearance of points on the metal, scratches, delamination of the coating) is visually assessed after different time cycles.
- Anti-adhesion tests with carbonized milk are carried out after each of the previous cycles.
- the corrosion resistance of a non-stick coating on a sandblasted aluminum substrate is evaluated by evaluating its resistance to the diffusion of salt towards the metallic substrate which corrodes.
- the substrate coated with the fluorinated coating is immersed for 20 hours in an aqueous saline solution brought to the boil.
- This saline solution contains 10% in weight of sodium chloride.
- the protocol for this test is that defined in standard ⁇ FNOR NF D21 -511 $ 3.3.5.
- a visual check of the final appearance of the coating is carried out, which consists of noting the presence or absence of traces of corrosion (by visual observation with the naked eye or with a magnifying glass binocular). In practice, this involves detecting the possible presence of traces such as blisters with extended areas, white traces under the coating,
- Heterocyclic polymer resins o PolyAmide-lmide (PAI) resin with 29% dry extract in N-butylpyrrolidone (NBP), o Resin in powder form: PolyAmide-amide resin with 90% dry extract in N-methylpyrrolidone ( NMP/ Water), reference from SOLV ⁇ Y, grade TORLON ⁇ I10LS, o Resin in solvent: Polybenzimidazole (PBI) at 9% in dimethylacetamide (DM ⁇ c).
- PAI PolyAmide-lmide
- NMP/ Water N-methylpyrrolidone
- PBI Polybenzimidazole
- DM ⁇ c dimethylacetamide
- PEEK PolyEtherEtherKetone
- Vicote 704 from VICTREX polymer powder with a d50 of 10 ⁇ m
- o PEKK powder resin KEPSTAN 7002 PT from Arkema with a d50 of 20 ⁇ m
- o PEKK powder resin KEPSTAN 6002 PT from Arkema with a d50 of 50 ⁇ m
- o Dispersion in aqueous phase of VICTREX grade Vicote F815 of mass composition: PEEK/[PTFE+PFA]: 70/30% and at 30% in aqueous phase
- o Resin powder PolyEtherSulfone (PES) micronized grade from SOLVAY, polymer powder with a d50 of 40 ⁇ m.
- Fluoropolymer resins (to be predispersed at 20% in PPG with UltraTurrax, 20,000 rpm) o PTFE powder from 3M / DYNEON: TF 9207 Z, o FEP powder from 3M / DYNEON: 6233PZ.
- Non-labeled polar aprotic solvents i.e. non-toxic within the meaning of the present invention: o N-formylmorpholine (NFM), o N-Methyl Imidazole (NMI), o N-ButylPyrrolidone (NBP).
- NFM N-formylmorpholine
- NMI N-Methyl Imidazole
- NBP N-ButylPyrrolidone
- Solvent Alcohol o Propylene Glycol: PPG, o Diethylene glycol: butyl diglycol.
- Surfactant and anti-foaming agent o Tego foamex K7 from Evonik, o Genapol X089 from Clariant.
- Reinforcement fillers o Alumina, grade CAHP-F240 (particle size in d50: 50 ⁇ m), o Silicon carbide, grades SIKA 400, SIKA 320, o Fumed silica, o MICA MILL200/325.
- Pigment o Black 100, o Blue CM13, o Brick red perylene (wear indicator), o Titanium, o Talc, o Graphite
- Acrylic resin o Modarez PW336: 30% acrylic polymer solution in aqueous phase, o Rohagit SD 15: 30% acrylic polymer solution in aqueous phase.
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- aqueous semi-finished SF1 composition comprising the following compounds is produced, their respective amounts being indicated below:
- the implementation of PAI comprises a step of passage into the aqueous phase by obtaining a polyamide-amic acid salt. This step is carried out in a Discontimill® brand ball mill, at room temperature in the presence of amine.
- the properties of the aqueous composition SF1 thus obtained are as follows:
- Theoretical dry extract 9.5%
- PPG Polymethyl methacrylate
- PTFE powder pre-dispersed at very high speed with an ultra-turax system before incorporation into a mixture such as:
- the final step is carried out in a Rayneri-type disperser to obtain the hard undercoat below:
- the properties of the SCD1 sub-layer of Example 1 thus obtained are as follows:
- the final mass ratio of the mixture of polymer resins is as follows:
- this layer SCD1 of example 1 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- the compositions are as follows:
- Colloidal silica (30% dry) 33.4 g
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- the final step is carried out in a Rayneri-type disperser to obtain the hard undercoat below:
- the final mass ratio of the mixture of polymer resins is as follows:
- the thickness of this SCD2 layer of example 2 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.).
- the whole being finally heated to 430° C. for 11 minutes, that is to say that the method only comprises a single sintering step at a T°C>400°C, and this, after the deposition of the various layers.
- Example 3 On a shaped aluminum disc (30cm in diameter), previously degreased and sandblasted to obtain a roughness of 4 to 7 ⁇ m (Ra), is deposited a continuous layer of Example 3 as described below.
- the final step is carried out in a Rayneri-type disperser to obtain the hard undercoat below:
- the final mass ratio of the mixture of polymer resins is as follows: PEEK / [PTFE + PF ⁇ ]: 70/30
- the thickness of the SCD3 sub-layer of example 3 is between 50 ⁇ m to 100 ⁇ m, preferably 50 ⁇ m to 60 ⁇ m
- the substrate and the continuous underlayer as described above are dried between 4 to
- the process includes only one sintering step at a T°C > 400°C.
- the underlayer constitutes the coating. It is not coated with other layers. 4:
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- PPG Polymethyl methacrylate
- PTFE powder pre-dispersed at very high speed with an ultra-turax system before incorporation into a mixture such as:
- the final step is carried out in a Rayneri-type disperser to obtain the adhesion sub-layer below: SF1 13.0g
- the final mass ratio of the mixture of polymer resins is as follows: PEEK / P ⁇ I / PES / Filler / PTFE: 19 / 3 / 23 / 25 / 30
- Theoretical dry extract 40.7%
- the thickness of this SCD4 layer of Example 4 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- the compositions are as follows:
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- the final step is carried out in a Rayneri-type disperser to obtain the adhesion sub-layer below: SF1 10.8g
- the final mass ratio of the mixture of polymer resins is as follows: PEEK / PAI / PES / Filler / Acryl resin. / Pigment: 19 / 3 / 23 / 30 / 5 / 20
- the thickness of this SCD5 layer of Example 5 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (14 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- a continuous layer SCD6 of example 6 is deposited on a shaped aluminum disk (30 cm in diameter), previously degreased and sandblasted to obtain a roughness of 4 to 7 ⁇ m (Ra), is deposited a continuous layer SCD6 of example 6 as described below.
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- PPG Polymethyl methacrylate
- PTFE powder pre-dispersed at very high speed with an ultra-turax system before incorporation into a mixture such as:
- the final step is carried out in a Rayneri-type disperser to obtain the adhesion sub-layer below:
- the final mass ratio of the polymer resin mixture is as follows: PEEK / P ⁇ I / PES / Filler / PTFE / Pigment: 17 / 3 / 25 / 15 / 30 / 10
- Theoretical dry extract 41.1% - Viscosity measured in ⁇ FNOR C ⁇ 6 Cup: 2.10 min
- the thickness of this SCD6 layer of example 6 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (14 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, that is to say that the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- the final step is carried out in a Rayneri-type disperser to obtain the adhesion sub-layer below:
- the final mass ratio of the mixture of polymer resins is as follows: PEEK / PAI / PES / Filler / Acryl resin. / Pigment: 17 / 2 / 25 / 30 / 5 / 21 Theoretical dry extract: 42.9%
- the thickness of this SCD7 layer of Example 7 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (14 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is generally carried out using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (eg in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- PPG Polymethyl methacrylate
- PTFE and FEP powders are pre-dispersed at very high speed with an ultra-turax system before incorporation into a mixture such as:
- the final step is carried out in a Rayneri-type disperser to obtain the adhesion sub-layer below:
- the final mass ratio of the polymer resin mixture is as follows: PEEK / PAI / PES / Filler / PTFE / FEP: 19 / 3 / 23 / 25 / 25 / 5
- Theoretical dry extract 41.0%
- this SCD8 layer of Example 8 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (14 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- the final step is carried out in a Rayneri-type disperser to obtain the hard undercoat below: SF1 18.5g
- the properties of the SCD9 sub-layer of Example 9 thus obtained are as follows:
- the final mass ratio of the mixture of polymer resins is as follows:
- the thickness of this SCD9 layer of example 9 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- a continuous layer SCD10 of example 10 is deposited on a shaped aluminum disk (30cm in diameter), previously degreased and sandblasted to obtain a roughness of 4 to 7 ⁇ m (Ra), is deposited a continuous layer SCD10 of example 10 as described below.
- PPG Polymethyl methacrylate
- PTFE powders are pre-dispersed at very high speed with an ultra-turax system before incorporation into a mixture such as:
- the final step is carried out in a Rayneri-type disperser to obtain the hard undercoat below:
- the properties of the SCD10 sub-layer of Example 10 thus obtained are as follows:
- the final mass ratio of the mixture of polymer resins is as follows: PEEK/PAI/PES/Filler/PTFE/Pigment: 42/3/20/ 10 / 20 / 5
- Theoretical dry extract 40.3%
- the thickness of this SCD10 layer of example 10 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.).
- the assembly being finally heated to 430° C. for 11 minutes, i.e. the process only comprises a single sintering step at a T° C. > 400° C., and this, after the deposition of the different layers.
- a continuous layer SCD2 of example 2 On a shaped aluminum disc (30cm in diameter), previously degreased and sandblasted to obtain a roughness of 4 to 7 ⁇ m (Ra), is deposited a continuous layer SCD2 of example 2.
- the thickness of this SCD2 layer of example 2 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- This underlayer is heated to 430°C for 11 minutes then cooled to 25-30°C for coating the following fluorinated layers:
- a non-stick coating composed of a mid-coat (6 - 8 pm) which is dried for 4 minutes at 100°C and a finish (14 - 18 pm). The whole being finally heated to 430°C for 11 minutes.
- This method therefore comprises two sintering steps.
- Ball milling consists of loading a jar with the sample to be ground and so-called grinding balls and rotating the jar around its axis at a certain speed.
- the rotation of the jar is usually done using a roller machine.
- the sample can be ground in dry form or dispersed in a suitable solvent (e.g. in water, in alcohol or in a solvent).
- the dispersion may also contain certain adjuvants (such as a dispersant or an antifoam).
- composition of the SCD11 undercoat is produced in a Rayneri-type disperser to obtain the hard undercoat below:
- the final mass ratio of the mixture of polymer resins is as follows: PEEK 100% Theoretical dry extract: 43.4%
- the thickness of this SCD11 layer of Counterexample 2 is between 50 ⁇ m to 100 ⁇ m, preferably 40 ⁇ m to 60 ⁇ m.
- the substrate and the continuous undercoat as described above are coated with a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.). The whole being finally heated to 430° C for 11 minutes.
- a multilayer non-stick coating consisting of a Mid-coat (6 - 8 ⁇ m) which is dried for 4 minutes at 100°C and a finish (2 - 6 p.m.). The whole being finally heated to 430° C for 11 minutes.
- the anti-adhesion of the complete coating with the upper layers based on fluorinated resins is good.
- the appearance of the scratch highlighted by the tests used is largely postponed or even non-existent for a configuration where the thickness of the underlayer is between 50 ⁇ m and 100 ⁇ m, preferably between 40pm and 60pm.
- This coating is obtained in a single sintering condition at 400-430°C for 11 minutes while maintaining excellent adhesion performance to the metal substrate and inter-layer adhesion.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22847572.9A EP4448658A1 (fr) | 2021-12-16 | 2022-12-16 | Procede d'application d'une sous-couche polymere pour renforcer la resistance mecanique, notamment a la chaleur, de revêtements fluores |
| US18/720,073 US20250051585A1 (en) | 2021-12-16 | 2022-12-16 | Method For Applying A Polymer Sublayer For Reinforcing The Mechanical Resistance, In Particular To Heat, Of Fluorinated Coatings |
| CN202280082972.2A CN118414386A (zh) | 2021-12-16 | 2022-12-16 | 涂敷聚合物底层的方法,用于增强氟化涂层的机械抗性,特别是耐热性 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113662A FR3130653B1 (fr) | 2021-12-16 | 2021-12-16 | Procédé d’application d’une sous couche polymérique pour le renforcement de la résistance mécanique, notamment à chaud des revêtements fluorés |
| FRFR2113662 | 2021-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023111489A1 true WO2023111489A1 (fr) | 2023-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2022/052409 Ceased WO2023111489A1 (fr) | 2021-12-16 | 2022-12-16 | Procede d'application d'une sous-couche polymere pour renforcer la resistance mecanique, notamment a la chaleur, de revêtements fluores |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250051585A1 (fr) |
| EP (1) | EP4448658A1 (fr) |
| CN (1) | CN118414386A (fr) |
| FR (1) | FR3130653B1 (fr) |
| WO (1) | WO2023111489A1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000054896A1 (fr) | 1999-03-16 | 2000-09-21 | Seb S.A. | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| WO2000054895A1 (fr) | 1999-03-16 | 2000-09-21 | Seb S.A. | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| FR2871038A1 (fr) | 2004-06-02 | 2005-12-09 | Seb Sa | Revetement anti-adhesif presentant une resistance amelioree a la rayure et article culinaire ainsi revetu |
| FR2874492A1 (fr) * | 2004-08-24 | 2006-03-03 | Seb Sa | Article culinaire comprenant un revetement anti-adhesif |
| FR2923696A1 (fr) * | 2007-11-16 | 2009-05-22 | Seb Sa | Article culinaire comprenant un revetement antiadhesif resistant a la corrosion et a la rayure |
| WO2010130954A1 (fr) | 2009-05-15 | 2010-11-18 | Seb Sa | Article culinaire comportant une base dure en un materiau ceramique et/ou metallique et/ou polymere et un revetement antiadhesif a base de resine fluorocarbonee |
-
2021
- 2021-12-16 FR FR2113662A patent/FR3130653B1/fr active Active
-
2022
- 2022-12-16 US US18/720,073 patent/US20250051585A1/en active Pending
- 2022-12-16 EP EP22847572.9A patent/EP4448658A1/fr active Pending
- 2022-12-16 WO PCT/FR2022/052409 patent/WO2023111489A1/fr not_active Ceased
- 2022-12-16 CN CN202280082972.2A patent/CN118414386A/zh active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000054896A1 (fr) | 1999-03-16 | 2000-09-21 | Seb S.A. | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| WO2000054895A1 (fr) | 1999-03-16 | 2000-09-21 | Seb S.A. | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| FR2791065A1 (fr) * | 1999-03-16 | 2000-09-22 | Seb Sa | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| FR2791066A1 (fr) * | 1999-03-16 | 2000-09-22 | Seb Sa | Revetement anti-adhesif presentant une resistance amelioree a la rayure |
| US6596380B1 (en) | 1999-03-16 | 2003-07-22 | Seb Sa | Antiadhesive coating with improved scratch resistance |
| FR2871038A1 (fr) | 2004-06-02 | 2005-12-09 | Seb Sa | Revetement anti-adhesif presentant une resistance amelioree a la rayure et article culinaire ainsi revetu |
| FR2874492A1 (fr) * | 2004-08-24 | 2006-03-03 | Seb Sa | Article culinaire comprenant un revetement anti-adhesif |
| FR2923696A1 (fr) * | 2007-11-16 | 2009-05-22 | Seb Sa | Article culinaire comprenant un revetement antiadhesif resistant a la corrosion et a la rayure |
| WO2010130954A1 (fr) | 2009-05-15 | 2010-11-18 | Seb Sa | Article culinaire comportant une base dure en un materiau ceramique et/ou metallique et/ou polymere et un revetement antiadhesif a base de resine fluorocarbonee |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250051585A1 (en) | 2025-02-13 |
| CN118414386A (zh) | 2024-07-30 |
| FR3130653A1 (fr) | 2023-06-23 |
| FR3130653B1 (fr) | 2024-04-12 |
| EP4448658A1 (fr) | 2024-10-23 |
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