DE3445337

Sheet steel used for making the cores of electrical machines is improved as to its punchability by coating it with a heat resistant coating of a complex mixture of phosphates and resins compatible with acid phosphate ions. The coating contains between 60 and 95% by weight of the phosphates and betwe...

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Bibliographische Detailangaben
Hauptverfasser: CANDIOTTI, MARCELLO, TERNI, IT, MARINI, PAOLO, ROM/ROMA, IT
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Sheet steel used for making the cores of electrical machines is improved as to its punchability by coating it with a heat resistant coating of a complex mixture of phosphates and resins compatible with acid phosphate ions. The coating contains between 60 and 95% by weight of the phosphates and between 5 and 40% by weight of the resins. The resins can be acrylic base resins, ethylene-vinyl acetate copolymer resins, or thermosetting epoxy resins.