A carbon article having an improved primer coating and an improved anti-oxidant coating

A carbon article formed as a brake disc is coated with an antiÂoxidant composition comprising aluminium phosphate (produced by reacting orthophosphoric acid and aluminium hydroxide), a wetting additive, demineralised water, colloidal silica, silicon hexaboride, and boron. Typically, the antioxidant...

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Bibliographische Detailangaben
Hauptverfasser:	CRAIG EDWARDS, ANDREW SKETCHLEY, DAVID CALLUM JOHNSON
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BLASTING BRAKES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY CLUTCHES COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS COUPLINGS FOR TRANSMITTING ROTATION DYES ENGINEERING ELEMENTS AND UNITS FILLING PASTES GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INKS LIGHTING MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THERMAL INSULATION IN GENERAL USE OF MATERIALS THEREFOR WEAPONS WOODSTAINS
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Beschreibung
Zusammenfassung:	A carbon article formed as a brake disc is coated with an antiÂoxidant composition comprising aluminium phosphate (produced by reacting orthophosphoric acid and aluminium hydroxide), a wetting additive, demineralised water, colloidal silica, silicon hexaboride, and boron. Typically, the antioxidant composition contains 5-25% aluminium phosphate, 0.1-1% wetting additive, 10-30% industrial methylated spirits, 25-45% demineralised water, 10-25% colloidal silica, 0.01-60% silicon hexaboride, and 0.01-30% boron. The composition may also comprise industrial methylated spirits. The antioxidant composition is applied over a cured primer coating composition to constitute an antioxidant system, wherein the primer composition comprises orthophosphoric acid, aluminium hydroxide, wetting additive, and demineralised water. Preferably, the primer composition contains 45-65% orthophosphoric acid, 5-15% aluminium hydroxide, 0.1-1% wetting additive, 20-45% water, colloidal silica, and industrial methylated spirits.