An intumescent coating composition

An intumescent coating composition and a coated metal substrate are described. The composition comprises:(a) a polymeric binder; (b) an acid catalyst effective to form a poiyphosphoric acid on thermal decomposition; (c) a solid carbon donor; (d) a liquid carbon donor in the form of one or more polyh...

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Bibliographische Detailangaben
1. Verfasser:	PESKENS RONNIE
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	An intumescent coating composition and a coated metal substrate are described. The composition comprises:(a) a polymeric binder; (b) an acid catalyst effective to form a poiyphosphoric acid on thermal decomposition; (c) a solid carbon donor; (d) a liquid carbon donor in the form of one or more polyhydric alcohols effective to form a phosphoric acid ester on contact with phosphoric acid; (e) an expansion agent; (f) one or more pigments; (g) optionally, one or more other additives; (h) a liquid carrier for the polymeric binder The ratio of combined components (b), (c), (e) and (f): (a) is at least 4:1 w/w. A coating composition wherein the concentration of components (b), (e) and (f) is in the range 55-75% w/w solids is further described.