Sunscreen compositions

US5980872A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Helmut Luther · Weil am Rhein, DE
• Albert Stehlin · Rixheim, FR
• Marina Minklei · Grenzach, DE

Key dates

• Filing date: Apr 20, 1998
• Grant date: Nov 9, 1999
• Expiry date: Apr 20, 2018

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/412
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention provides a method of producing a composition, suitable for use in pharmaceutical or cosmetic compositions, comprising a micronised insoluble organic UV absorber, which method comprises grinding the insoluble organic UV absorber, in coarse particle form, in a grinding apparatus, in the presence of 0.1 to 30% by weight of an alkyl polyglucoside having the formula C.sub.n H.sub.2n+1 O(C.sub.6 H.sub.10 O.sub.5).sub.x H, in which n is an integer ranging from 8 to 16 and x is the mean polymerization level of the glucoside moiety (C.sub.6 H.sub.10 O.sub.5) and ranges from 1.4 to 1.6, or an ester thereof.