Patent ID: 6451750
Filing Date: 2002-09-17
Classification: C11D

Abstract:
A water soluble package formed from a copolymeric polyvinyl alcohol film, wherein a comonomer comprises a carboxylate function, the package containing a substantially non-aqueous liquid composition which comprises at least one ionic ingredient with an exchangeable hydrogen ion, no more than about 5% by weight of water and a molar excess, with respect to the amount of exchangeable hydrogen ions in the at least on ionic ingredient, of a stabilizing compound selected from the group consisting of monoethanolamine, triethanolamine, potassium hydroxide, and mixtures thereof, effective for combining with the exchangeable hydrogen ions to hinder the formation of lactones with the film;with the proviso that if the stabilizing compound is or comprises an inorganic base or ammonium hydroxide then it is present in an amount of at least 95 mole % of the amount to completely neutralise the at least one ionic ingredient.