Fire-retarding sheet material having a metallic effect
View Patent ↗Flame-retardant plastics mouldings composed of polyphenyl sulphones (PPSUs) or of polycarbonates (PCs) are coloured with Iridoin® pigments in such a way as to have a metallic effect. The effect is resistant to the usual stresses present in an aircraft cabin and complies with the respective fire-protection requirements.
1. A flame-retardant plastic sheet article comprising a flame-retardant plastic molding composition comprising:
a flame-retardant plastic comprising at least one polymer selected from the group consisting of a polycarbonate, a polysulfone, a polyphenylsulfone, and a polyethersulfone;
a pigment comprising either flakes of natural mica coated with a metal oxide selected from the group consisting of titanium dioxide, iron (III) oxide, and a mixture of titanium dioxide and iron (III) oxide, or 5-25 μm particles of mica coated with titanium dioxide and tin oxide; and
a colorant other than the pigment,
wherein the pigment is present in an amount of from 0.1 wt. % to 2 wt. %, based on a total weight of the flame-retardant plastic molding composition, and
wherein the flame-retardant plastic molding composition exhibits a gold, copper, silver or aluminum metallic surface effect.
2. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polycarbonate.
3. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polysulfone.
4. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polyphenylsulfone.
5. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polyethersulfone.
6. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic is transparent.
7. The flame-retardant plastic sheet article according to claim 1 , wherein the pigment comprises flakes of natural mica coated with a mixture of titanium dioxide and iron(III) oxide.
8. The flame-retardant plastic sheet article according to claim 1 , wherein the pigment comprises 5-25 μm particles of mica coated with titanium dioxide and tin oxide.
9. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits a gold metallic surface effect.
10. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits a copper metallic surface effect.
11. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits a silver metallic surface effect.
12. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits an antique silver metallic surface effect.
13. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits an aluminum metallic surface effect.
14. The flame-retardant plastic sheet article according to claim 13 , wherein the flame-retardant plastic molding composition exhibits a white aluminum RAL 9006 metallic surface effect.
15. The flame-retardant plastic sheet article according to claim 13 , wherein the flame-retardant plastic molding composition exhibits a grey aluminum RAL 9007 metallic surface effect.
16. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition satisfies the fire retardancy requirements set forth in Federal Aviation Regulation 25.853.
17. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic molding composition exhibits an average maximum heat release rate of less than or equal to 65 kW/m 2 during a burn period of 5 minutes and an average total heat release of less than or equal to 65 kW·min/m 2 during a burn period of 2 minutes.
18. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic sheet article has a thickness of 1.0-12 mm.
19. The flame-retardant plastic sheet article according to claim 1 , wherein the pigment comprises flakes of natural mica coated with titanium dioxide.
20. The flame-retardant plastic sheet article according to claim 1 , wherein the pigment comprises flakes of natural mica coated with iron(III) oxide.
21. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polyphenylsulfone and one or more polymers selected from the group consisting of a polycarbonate, a polysulfone, and a polyethersulfone.
22. The flame-retardant plastic sheet article according to claim 1 , wherein the flame-retardant plastic comprises a polyphenylsulfone and a polycarbonate.
23. A process for producing the flame-retardant plastic sheet article according to claim 1 , wherein said process comprises:
mixing the flame-retardant plastic, the pigment and the colorant together to produce the flame-retardant plastic molding composition in a form of a mixture; and
extruding the mixture to produce the flame-retardant plastic sheet article.
24. The process according to claim 23 , wherein the flame-retardant plastic sheet article has a thickness of 1.0-12 mm.