METHOD FOR PROVIDING RESISTANCE TO YELLOWING IN POLYAMIDE ARTICLES AND POLYAMIDE ARTICLES OBTAINED FROM THIS METHOD

The present invention relates to a method for providing resistance to phenolic yellowing, during storage, transportation and processing of polyamide articles, caused by the presence of phenolic compounds in plastic package materials. The phenolic yellowing resistance is obtained by adding a sulfonat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	EVERTON FERREIRA DOS SANTOS, RENATA REDONDO BONALDI, GABRIEL GORESCU, THOMAS GONZAGA CANOVA
Format:	Patent
Sprache:	eng ; por
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	The present invention relates to a method for providing resistance to phenolic yellowing, during storage, transportation and processing of polyamide articles, caused by the presence of phenolic compounds in plastic package materials. The phenolic yellowing resistance is obtained by adding a sulfonated reagent during polymerization of the polyamide and/or during the formation of the polyamide article, like melt-spinning extrusion, and/or during the conversion of the polyamide article by texturizing.