Fabrics having a topically applied silver-based finish with a cross-linked binder system for improved wash durability

Abstract

The present invention provides Improvements in the wash durability and discoloration levels for fabrics having topically applied silver-ion treatments (such as ion-exchange compounds, like zirconium phosphates, glasses and / or zeolites) are provided. Such solid compounds are generally susceptible to discoloration and, due to the solid nature thereof, are typically easy to remove from topical surface applications. The inventive treatment requires the presence of a specific polyurethane binder, either as a silver-ion overcoat or as a component of a dye bath mixture admixed with the silver-ion antimicrobial compound. In addition, specific metal halide additives (preferably substantially free from sodium ions) are utilized to combat the discolorations typical of such silver-ion formulations. As a result, wash durability, discoloration levels, or both, can be improved to the extent that after a substantial number of standard launderings and dryings, the inventive treatment does not wear away in any appreciable amount and the color of the treatment remains substantially the same as when first applied. The particular treatment method as well as the treated fabrics are also encompassed within this invention.

Description

technical field [0001] The present invention relates to the improvement of wash fastness and degree of discoloration of fabrics to which silver ion treatments such as ion exchange compounds such as zirconium phosphate, glass and / or zeolites are applied to the surface. Such solid compounds are often prone to discoloration and, due to their solid nature, are generally prone to release during surface application. The treatments of the present invention require the use of specific polyurethane binders either as an overcoat of silver ions or as a component of a dye bath mixture mixed with silver ionic antimicrobial compounds. In addition, specific metal halide additives (preferably substantially free of sodium ions) are used to combat the discoloration typical of such silver ion formulations. As a result, after extensive standard washing and drying, wash fastness, degree of discoloration, or both can be improved to some extent, the treatment of the present invention is not lost in...

AI Technical Summary

Problems solved by technology

To date, problems related to discoloration have been noted, but not resolved