IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0592973
(2009-11-20)
|
등록번호 |
US-8734935
(2014-05-27)
|
우선권정보 |
DE-10 2008 058 318 (2008-11-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Pauley Petersen & Erickson
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
A functional element, in particular a cooktop or control panel, having a flat substrate composed of or of glass or glass ceramic, in which a coating that contains a crosslinked polysiloxane is applied to the substrate. In order to improve the scratch resistance of such a coating, according to this i
A functional element, in particular a cooktop or control panel, having a flat substrate composed of or of glass or glass ceramic, in which a coating that contains a crosslinked polysiloxane is applied to the substrate. In order to improve the scratch resistance of such a coating, according to this invention, a covering layer that contains an uncrosslinked polysiloxane is applied to the coating.
대표청구항
▼
1. A functional element, in particular a cooktop or a control panel, having a flat substrate (1) of a glass or a glass ceramic, a coating (2) containing a crosslinked polysiloxane applied to the substrate (1), and a covering layer (3) of an uncrosslinked polysiloxane applied over the coating (2), wh
1. A functional element, in particular a cooktop or a control panel, having a flat substrate (1) of a glass or a glass ceramic, a coating (2) containing a crosslinked polysiloxane applied to the substrate (1), and a covering layer (3) of an uncrosslinked polysiloxane applied over the coating (2), wherein the covering layer contains a silicone resin in a form of polysiloxanes with methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 2. The functional element as recited in claim 1, wherein a layer thickness of the coating (2) and/or the covering layer (3) lies in a range from 10 to 50 μm. 3. The functional element as recited in claim 2, wherein the layer thickness of the coating (2) and/or the covering layer (3) lies in a second range from 15 to 30 μm. 4. The functional element as recited in claim 3, wherein the total layer thickness, comprising a sum of the layer thickness of the coating (2) and the covering layer (3), is at least 20 μm. 5. The functional element as recited in claim 4, wherein the total layer thickness is in a thickness range from 25 to 65 μm. 6. The functional element as recited in claim 5, wherein a coating material for the coating (2) contains a silicone resin in a form of solid or fluid polysiloxanes with methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 7. The functional element as recited in claim 6, wherein a percentage of the silicone resin in the crosslinked coating is in a range from 40 to 70 wt. 8. The functional element as recited in claim 7, wherein the coating (2) contains inorganic colored pigments, white pigments, and/or black pigments. 9. The functional element as recited in claim 8, wherein the coating contains inorganic luster pigments. 10. The functional element as recited in claim 9, wherein the inorganic luster pigments are coated and/or uncoated platelet-shaped pigment parts. 11. The functional element as recited in claim 10, wherein the inorganic colored pigments, black pigments, and/or white pigments have a particle diameter of less than 20 μm. 12. The functional element as recited in claim 10, wherein when platelet-shaped luster pigments are used, they have an edge length of ≦100 μm, preferably ≦75 μm. 13. The functional element as recited in claim 12, wherein the percentage of colored pigments and/or black pigments and/or white pigments in the crosslinked coating (2) is in a range from 20 to 40 wt. %. 14. The functional element as recited in claim 13, wherein a percentage of fillers in the crosslinked coating (2) lies in the range from >0 to 15 wt. %. 15. The functional element as recited in claim 13, further comprising layered silicate particles as a filler, wherein a maximum size of the layered silicate particles is in a range from 10 to 30 μm and an average particle size is 1 to 20 μm. 16. The functional element as recited in claim 15, wherein the percentage of layer silicates in the covering layer (3) is ≦50 wt. %, preferably from 10 to 25 wt. %. 17. The functional element as recited in claim 16, wherein the softening point or the melting point of the material of the coating (2) is ≧40° C. 18. The functional element as recited in claim 17, wherein the covering layer (3) contains a solid lubricant including a graphite and/or a boron nitride. 19. The functional element as recited in claim 18, wherein the coating (2) and the covering layer (3) are produced from the same coating material. 20. The functional element as recited in claim 19, wherein the coating system is of the coating (2) and the covering layer (3) has a sheet resistance of ≧109 Ω/cm2. 21. The functional element as recited in claim 1, wherein a total layer thickness, comprising a sum of the layer thickness of the coating (2) and the covering layer (3), is at least 20 μm. 22. The functional element as recited in claim 1, wherein a coating material for the coating (2) contains a silicone resin in a form of solid or fluid polysiloxanes with methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 23. The functional element as recited in claim 6, wherein the coating material for the coating (2) contains hydroxy-functional phenylpolysiloxanes with a percentage of 2 to 5 wt. % hydroxy groups and a molecular weight of 1500 to 2000 g/mol. 24. The functional element as recited in claim 1, wherein a percentage of the silicone resin in the crosslinked coating is in a range from 50 to 60 wt. %. 25. The functional element as recited in claim 1, wherein the coating (2) contains inorganic colored pigments, white pigments, and/or black pigments. 26. The functional element as recited in claim 1, wherein the coating contains inorganic luster pigments. 27. The functional element as recited in claim 8, wherein the inorganic colored pigments, black pigments, and/or white pigments have a particle diameter of less than 10 μm. 28. The functional element as recited in claim 1, wherein when platelet-shaped luster pigments are used, they have an edge length of ≦75 μm. 29. The functional element as recited in claim 1, wherein a percentage of colored pigments and/or black pigments and/or white pigments in the crosslinked coating (2) is in a range from 24 to 36 wt. %. 30. The functional element as recited in claim 1, wherein the coating (2) and/or the covering layer (3) each contains platelet-shaped fillers. 31. The functional element as recited in claim 1, wherein a percentage of fillers in the crosslinked coating (2) lies in the range from >0 to 15 wt. %. 32. The functional element as recited in claim 1, wherein a softening point or a melting point of the material of the coating (2) is ≦60° C. 33. The functional element as recited in claim 1, wherein the covering layer (3) contains a solid lubricant including a graphite and/or a boron nitride. 34. The functional element as recited in claim 1, wherein the coating (2) and the covering layer (3) are produced from a same coating material. 35. The functional element as recited in claim 1, wherein a coating system of the coating (2) and the covering layer (3) and has a sheet resistance of ≧109 Ω/cm2. 36. The functional element as recited in claim 1, wherein the covering layer (3) is softer than the coating (2), and a combination of the harder coating (2) and the softer covering layer (3) provides scratch resistance during transport and installation of the functional element wherein the coating is opaque, and during consumer use of the functional element the covering layer crosslinks. 37. A functional element, in particular a cooktop or a control panel, having a flat substrate (1) of a glass or a glass ceramic, a coating (2) containing a crosslinked polysiloxane applied to the substrate (1), and a covering layer (3) of an uncrosslinked polysiloxane applied over the coating (2), wherein the coating material for the coating (2) contains hydroxy-functional phenylpolysiloxanes with a percentage of 2 to 5 wt. % hydroxy groups and a molecular weight of 1500 to 2000 g/mol. 38. The functional element as recited in claim 37, wherein the covering layer contains a silicone resin in a form of polysiloxanes with methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 39. A functional element, in particular a cooktop or a control panel, having a flat substrate (1) of a glass or a glass ceramic comprising a scratch resistant coating, the scratch resistant coating including an opaque harder first layer (2) formed of a crosslinked polysiloxane on the substrate (1), and a softer second layer (3) formed of an uncrosslinked polysiloxane over the coating (2), wherein the first coating is impermeable to the second covering layer (3) and the second layer (3) is sufficiently soft to be penetrated by a scratching or scraping object, wherein the uncrosslinked polysiloxane of the second layer has methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 40. A functional element, in particular a cooktop or a control panel, having a flat substrate (1) of a glass or a glass ceramic and a coating thereon that provides scratch resistance during transport and installation of the functional element, the coating including a first coating (2) containing a crosslinked polysiloxane applied to the substrate (1) and a second covering layer (3) containing an uncrosslinked polysiloxane applied over the coating (2), wherein the first coating is opaque and impermeable to the second covering layer (3), wherein the uncrosslinked polysiloxane of the second covering layer has methyl or phenyl groups as organic radicals and hydroxy, alkoxy, or vinyl radicals as functional groups. 41. The functional element as recited in claim 40, wherein the first coating has a greater hardness than the second covering layer. 42. The functional element as recited in claim 40, wherein a layer thickness of the first coating (2) and/or the second covering layer (3) lies in a range from 15 to 30 μm, and a total layer thickness, comprising a sum of the layer thickness of the first coating (2) and the second covering layer (3), is at least 20 μm.
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