Nanocomposite material for the production of index of refraction gradient films

US7473721B2 · kind B2 · utility

Assignee

• Tomoegawa Corporation · JP

Inventors

• Takamasa Harada · Oberursel, DE
• Fumio Kita · Wiesbaden, DE
• Andreas Zimmermann · Griesheim, DE
• Ulrike Dellwo · Gusenburg, DE
• Martin Mennig · Idar-Oberstein, DE
• Peter W. Oliveira · Riegelsberg, DE
• Helmut Schmidt · Riegelsberg, DE
• Heike Schneider · Aken, DE

Key dates

• Filing date: Jan 3, 2003
• Grant date: Jan 6, 2009
• Expiry date: Apr 6, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2260/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to solid or gel-type nanocomposite material which can be polymerised, containing a) 4.9 95.9 wt. % of a soluble polymer; b) 4-95 wt. % of a partially or totally condensed silane selected from the group of epoxyalkoxysilanes, alkoxysilanes and alkylalkoxysilanes, the silane having an inorganic condensation degree of between 33-100% and an organic conversion degree of between 0-95%; c) 0-60 wt. % of an acrylate; d) 0.1-50 wt. % of surface modified nanometric particles selected from the group of oxides, sulphides, selenides, tellurides, halogenides, carbides, arsenides, antimonides, nitrides, phosphides, carbonates, carboxylates, phosphates, sulphates, silicates, titanates, zirconates, aluminates, stannates, plumbates and a mixed oxides; e) 0-50 wt.-% of a plasticizer; f) 0-5 wt. % of a thermal or photochemical cross-linking initiator, sensitizer, auxiliary wetting agent, adhesive agent, antioxidant, stabiliser, coloring agent, photochrome material and thermochrome material in relation to the total weight (dry weight) of the nanocomposite material.