Porous fillers in polymerizable compositions

US4707504A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Walkowiak · Leverkusen, DE
• Klaus-Dieter Nehren · Dormagen, DE
• Wolfgang Podszun · Neunburg vorm Wald, DE
• Werner Finger · Leverkusen, DE

Key dates

• Filing date: Aug 6, 1985
• Grant date: Nov 17, 1987
• Expiry date: Aug 6, 2005

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K6/887
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The use of microporous inorganic fillers in polymerizable compositions, in particular in the dental field, characterized in that the fillers have PA1 (a) an average particle size of 0.5 to 50.mu., PA1 (b) a BET-surface area of at least 200 m.sup.2 /g, PA1 (c) a pore volume of 0.7 to 5 ml/g and PA1 (d) a pore diameter of 10 to 50 nm. Fillings made therefrom are smooth and easy to polish.