Cooking item comprising a non stick coating with improved properties of adhesion to the substrate
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05D-003/02
B05D-007/22
A47J-036/02
B05D-005/08
C09D-183/04
출원번호
US-0760304
(2013-02-06)
등록번호
US-9199275
(2015-12-01)
우선권정보
FR-08 57044 (2008-10-16)
발명자
/ 주소
Le Bris, Stéphanie
Dubanchet, Aurélien
Perillon, Jean-Luc
출원인 / 주소
SEB SA
대리인 / 주소
Patterson Thuente Pedersen, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A cooking item including a vitreous coating with improved impact-resistance properties, and a method for manufacturing such an item. The method for manufacturing includes optionally treating a concave internal side of a substrate having the end shape of the cooking item, the concave internal side be
A cooking item including a vitreous coating with improved impact-resistance properties, and a method for manufacturing such an item. The method for manufacturing includes optionally treating a concave internal side of a substrate having the end shape of the cooking item, the concave internal side being arranged on the side of the food to be introduced in said item, and a convex exterior side to be arranged on the heat source side, so as to obtain a treated internal side adapted to cause a hard base layer to adhere to the substrate, The method further includes preparing an adhering hard base layer on said internal side of the substrate, be it treated beforehand or not, and preparing a non-stick coating on the hard base layer.
대표청구항▼
1. A method for producing a cooking item, the method comprising: a) providing a substrate having an end shape of the cooking item, the end shape presenting a concave internal side configured to contain a food item introduced into said cooking item, and a convex exterior side configured to be positio
1. A method for producing a cooking item, the method comprising: a) providing a substrate having an end shape of the cooking item, the end shape presenting a concave internal side configured to contain a food item introduced into said cooking item, and a convex exterior side configured to be positioned proximate a heat source;b) optionally, treating the internal side of the substrate, so as to obtain a treated internal side adapted to cause a hard base layer to adhere to the substrate;c) preparing a discontinuous enameled adhering base layer on said internal side of the substrate, be it treated beforehand or not; andd) preparing a non stick PTFE-free coating on said hard base layer formed in step c);wherein step c) of preparing a discontinuous, enameled hard base layer comprises successively—c1) preparing an aqueous slurry of enamel frit,c2) applying, through air spraying, the slurry on the internal side of the substrate with a pressure equal to or higher than 4 bars such that the amount of deposited slurry is comprised between 0.07 g/dm2 and 0.2 g/dm2, and thenc3) drying and/or curing said enamel layer so as to form a hard biscuit of enamel or a layer of cured enamel, andwherein step d) of preparing the non stick PTFE-free coating on said enamel hard biscuit or said cured enamel layer comprises successively—d1) preparing a sol-gel composition (A+B) comprising at least a colloidal metal oxide and at least a metal oxide precursor, wherein the preparation of the sol-gel composition (A+B) comprises successively: i) preparing an aqueous composition A comprising 5 to 30% by weight with respect to a total weight of the aqueous composition A of at least one colloidal metal oxide, and 0 to 20% by weight with respect to a total weight of composition A of a solvent comprising at least one alcohol;ii) preparing a solution B comprising at least a metal alkoxide as the at least one metal oxide precursor;iii) mixing solution B of metal alkoxide with aqueous solution A so as to obtain a sol-gel composition (A+B) containing 40 to 75% by weight of the aqueous composition A with respect to a total weight of the sol-gel composition (A+B), so that an amount of colloidal metal oxide represents 5 to 30% by weight of the sol-gel composition (A+B) on a dry basis;d2) applying over an entirety or over a portion of the enamel hard biscuit or said cured enamel layer at least a layer of the sol-gel composition (A+B) having a wet-basis thickness of at least 20 μm, and thend3) curing said sol-gel composition layer (A+B) so as to obtain a non stick PTFE-free vitreous coating having a thickness of at least 10 μm. 2. The method according to claim 1, wherein: said enamel frit comprises 30 to 40% by weight of silica and 15 to 30% by weight of titanium oxide, less than 10% by weight of vanadium oxide and less than 4% by weight of lithium oxide with respect to a total weight of the enamel frit, andthe aqueous slurry comprises at least 20% by weight of mineral fillers with respect to a total weight of the aqueous slurry. 3. The method according to claim 1, wherein the colloidal metal oxide is selected from the group consisting of silica, alumina, cerium oxide, zinc oxide, vanadium oxide, zirconium oxide, and combinations thereof. 4. The method according to claim 1, wherein the aqueous composition A further comprises at least one silicone oil. 5. The method according to claim 1, wherein the metal alkoxide of solution B is selected from the group consisting of: precursors having a chemical formula of M1(OR1)n,precursors having a chemical formula of M2(OR2)(n-1)R2′,precursors having a chemical formula of M3(OR3)(n-2)R3′2, with: R1, R2, R3 or R3′ being an alkyl group,R2′ designating an alkyl or phenyl group,n being an integer corresponding to a maximal valence of metals M1, M2, or M3,M1, M2, or M3 designating a metal selected from among Si, Zr, Ti, Sn, Al, Ce, V, Nb, Hf, Mg or Ln. 6. The method according to claim 5, wherein the metal alkoxide is an alkoxysilane selected from methyltriethoxysilane (MTES) and tetraethoxysilane (TEOS). 7. The method according to claim 1, wherein step b) of treating the internal side of substrate comprises a step of performing a sand blasting type mechanical treatment. 8. The method according to claim 1, wherein during step c) of preparing a discontinuous, enameled hard base layer, the non cured enamel layer is dried at a temperature between 120 and 200° C., so as to obtain an enameled biscuit. 9. The method according to claim 1, wherein during step c) of preparing a discontinuous, enameled hard base layer, the non cured enamel layer is subjected to a curing at a temperature between 500° C. and 580° C.
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이 특허에 인용된 특허 (12)
Le Bris, Stephanie; Dubanchet, Aurelien; Joutang, Isabelle; Perillon, Jean-Luc, Article including a sol-gel coating equipped with a functional design and process for producing such an article.
Le Bris, Stéphanie; Dubanchet, Aurélien; Perillon, Jean-Luc, Cooking item comprising a non-stick coating with improved properties of adhesion to the substrate.
Berghmans ; Jacques M. L. ; Vary ; Eva M., Finishes having improved scratch resistance prepared from compositions of fluoropolymer, mica particles or metal flake,.
Roberts Robert (Newark DE) Rau Steven E. (Newark DE) Pochopien Kevin P. (Newark DE) Morris Harris L. (Lima PA), Polymer metal bonded composite and method of producing same.
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