Bayer Materialscience Ag

Inphase Technologies, Inc.

Nicolas Stöckel

Friedrich-Karl Bruder

Harald Blum

Jan Weikard

Thomas Fäcke

Michael Christopher Cole

Thomas Rölle

Marc-Stephan Weiser

Dennis Hönel

Sebastian Dörr

Fredric R Askham

Lisa Dhar

Timothy J Trentler

Songvit Setthachayanon

Sean Quirin

Mark David Michaels

Sam Miller

Marianela T Lemon

The present invention relates to a polyurethane composition comprising

Prepolymer-based polyurethane formulations for producing holographic media

High performance media suitable for recording with a blue laser is disclosed. The blue-sensitized holographic media provides greater dynamic range and higher sensitivity than previously disclosed blue-sensitized holographic media. These media can be used for diverse applications such as data storage where the articles provide denser data storage and more rapid hologram writing times or for optical waveguides where the articles provide greater optical confinement and more rapid manufacturing times.

Advantageous recording media for holographic applications

The invention relates to novel aromatic urethane (meth)acrylates having a high refractive index, a process for the preparation thereof and a process for the production of holographic media.

Aromatic urethane acrylates having a high refractive index

The present invention provides polyurethane systems which cure by radiation and thermal action with crosslinking, and use thereof for the production of holographic media. The polyurethane compositions of the invention comprise A) polyisocyanates, B) isocyanate-reactive block copolymers, C) compounds having groups which react on exposure to actinic radiation with ethylenically unsaturated compounds with polymerization, D) optionally free radical stabilizers and E) photoinitiators.

Radiation-crosslinking and thermally crosslinking PU systems based on isocyanate-reactive block copolymers

Growing community of inventors

Kö'ln, Germany

Nicolas Stöckel