Polyesterzusammensetzung und Extrusionsbeschichtungsverfahren

Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of about 10,000 to abou...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHMID, CHRISTIAN, JUNG, ROLF, POSTLE, STEPHEN, JIMINEZ, ARTEMIO, LU, MARTIN, SHARP, LOUIS, WIDMER, HANS
Format: Patent
Sprache:ger
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Beschreibung
Zusammenfassung:Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of about 10,000 to about 50,000, and optionally, (b) a modifying resin, such as an epoxy resin having an epoxy equivalent weight of about 500 to about 15,000. The extrusion coating composition is applied to a metal substrate in an extrusion process to provide a composition film having a thickness of about 1 to about 40 microns.