Patent ID: 7628997
Filing Date: 2009-12-08
Classification: A61K,A61Q,C03C

Abstract:
1. In a method of preserving a perishable cosmetic preparation, the improvement comprising adding from 0.1 to 25 percent by weight of bioactive glass particles with particles sizes (d 50 ) up to about 10 μm to said perishable cosmetic preparation, so that upon contact with an aqueous medium said bioactive glass particles form a hydroxyapatite layer on surfaces of said bioactive glass particles and said bioactive glass particles thus provide antimicrobial action in said perishable cosmetic preparation because of the presence of said hydroxyapatite layer; and in which said bioactive glass particles contain calcium and phosphorus in a molar ratio greater than 2 and in relative amounts that are sufficient for formation of said hydroxyapatite layer on contact with said aqueous medium and said bioactive glass particles do not contain any Ag