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A non-stick coating with improved scratch resistance comprises an undercoat applied to a substrate, coated with a primary coat comprising a fluorocarbon resin and one or more fluorocarbon resin-based outer coats. The undercoat comprises at least 50% by weight of the polymer oxy-1,4-phenylene-oxy-1,4

A non-stick coating with improved scratch resistance comprises an undercoat applied to a substrate, coated with a primary coat comprising a fluorocarbon resin and one or more fluorocarbon resin-based outer coats. The undercoat comprises at least 50% by weight of the polymer oxy-1,4-phenylene-oxy-1,4-phenylene-carbonyl-1,4-phenylene, known as PEEK, and is free of fluorocarbon resin.

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1. A non-stick coating with improved scratch resistance, comprising an undercoat applied to a substrate, a primary coat comprising a fluorocarbon resin applied to said undercoat and at least one fluorocarbon resin-based outer coat, said undercoat comprising at least 50% by weight of the polymer oxy-

1. A non-stick coating with improved scratch resistance, comprising an undercoat applied to a substrate, a primary coat comprising a fluorocarbon resin applied to said undercoat and at least one fluorocarbon resin-based outer coat, said undercoat comprising at least 50% by weight of the polymer oxy-1,4-phlenylene-oxy-1,4-phenylene-carbonyl-1,4-phenylene, known as PEEK; and a remaining proportion being composed of thermostable polymers used pure or as a mixture, and inert fillers selected from the group consisting of metal oxides, silica, mica particles, and flaked fillers; and said undercoat being free of fluorocarbon resin, said coats having been sintered at temperatures of 400-420° C., and wherein said thermostable polymers are selected from the group consisting of polyphenylene sulfide, polyetherimide, polyimide, polyamide-imide, and mixtures thereof. 2. A coating according to claim 1, wherein the undercoat constituted by said PEEK covers 60% to 95% of the total coated surface of the substrate. 3. A coating according to claim 1, wherein the thickness of said undercoat is in the range of 5 μm to 100 μm. 4. A coating according to claim 1, wherein said fluorocarbon resin is polytetrafluoroethylene (PTFE) or a PTFE-PFA (perfluoroalkyl vinyl ether) mixture. 5. Cookware coated with a coating comprising an undercoat applied to a substrate, a primary coat comprising a fluorocarbon resin applied to said undercoat and at least one fluorocarbon resin-based outer coat, said undercoat comprising at least 50% by weight of the polymer oxy-1,4-phenylene-oxy-1,4-phenylene-carbonyl-1,4-phenylene, known as PEEK; and a remaining proportion being composed of thermostable polymers used pure or as a mixture, and inert fillers selected from the group consisting of metal oxides, silica, mica particles, and flaked fillers; and said undercoat being free of fluorocarbon resin, said coats having been sintered at temperatures of 400-420° C., and wherein said thermostable polymers are selected from the group consisting of polyphenylene sulfide, polyetherimide, polyimide, polyamide-imide, and mixtures thereof. 6. A method of applying a non-stick coating with improved scratch resistance comprising the steps of: applying an undercoat to a substrate, said undercoat comprising at least 50% by weight of the polymer oxy-1,4-phenylene-oxy-1,4-phenylene-carbonyl-1,4-phenylene, known as PEEK; and a remaining proportion being composed of thermostable polymers used pure or as a mixture, and inert fillers selected from the group consisting of metal oxides, silica, mica particles or flaked fillers; and said undercoat being free of fluorocarbon resin; fusing said undercoat at a temperature of at least 340° C.; applying to said undercoat a primary coat comprising a fluorocarbon resin and at least one fluorocarbon resin-based outer coat in succession to said undercoat; and sintering the coats at a temperature in the range of 400-420° C., and wherein said thermostable polymers are selected from the group consisting of polyphenylene sulfide, polyetherimide, polyimide, polyamide-imide, and mixtures thereof. 7. A method according to claim 6, wherein said PEEK applying step comprises applying the PEEK in the form of a powder with a grain size in the range of 4 μm to 80 μm and a mean grain size of about 20 μm.