Hybrid plastic filling material

US5028638A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Renate Heid · Trier, DE
• Jens Winkel · Cologne, DE
• Heiko Herold · Dormagen, DE
• Peter Schwabe · Leverkusen, DE
• Werner Finger · Leverkusen, DE
• Wolfgang Podszun · Neunburg vorm Wald, DE

Key dates

• Filing date: Jan 22, 1990
• Grant date: Jul 2, 1991
• Expiry date: Jan 22, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S522/908
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

In a dental composite containing a polymerizable (meth)acrylic compound, photoinitiator, accelerator, inorganic filler and conventional auxiliaries, the improvement wherein the composite by weight comprises about PA1 (a) 10-50% of at least one monomer which contains at least 2 polymerizable (meth)acrylic acid groups, PA1 (b) 5-80% of a glass or a glass ceramic which has an average particle size of between about 0.1 and 10 .mu.m and has been post-treated with .gamma.-methacryloxypropyltrimethoxysilane up to a carbon content of between about 0.5 and 2.5% by weight, PA1 (c) 2-10% of a surface-treated microfiller and PA1 (d) 0.1-5% of a photoactivator consisting of a mixture of camphorquinone and p-dialkylaminobenzenesulphonamide. The composition has a long pot life and good surface color when cured.