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US 8,329,773 B2Granted
Holographic media and photopolymers
AssigneeBayer MaterialScience AG
InventorsThomas Fäcke, Friedrich-Karl Bruder, Marc-Stephan Weiser, Thomas Rölle, Dennis Hönel
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Abstract
The invention relates to holographic media containing specific photopolymers, a process for the production thereof, and unsaturated glycidyl ether acrylate urethanes as writing monomers which are suitable for the preparation of photopolymers.
Claims9
A photopolymer composition comprising
- a) an unsaturated glycidyl ether acrylate urethane of formula (1a), formula (1b), or mixtures thereof
- wherein
- n is an integer from 2 to 6;
- R1 is a mono- or polynuclear organic radical comprising an aromatic group and from 4 to 36 carbon atoms;
- R2 is an olefinically unsaturated radical comprising from 3 to 30 carbon atoms;
- and
- R is an organic radical derived from an aliphatic or aromatic di- or polyisocyanate and comprises from 2 to 30 carbon atoms;
- b) a binder system;
- c) a photoinitiator system;
- and
- d) optionally, a free radical stabilizer, a catalyst, and/or one or more further additives.
8 more elements
A glycidyl ether acrylate urethane of formula (1a) or (1b)
- wherein
- n is an integer from 2 to 6;
- R1 is a halogen- and/or alkylthio-, and/or arylthio-substituted oxyphenyl ring or is a halogen-, alkyl-, aryl-, alkylthio-, or arylthio-substituted oxynaphthyl, oxyanthracenyl, oxyphenantryl, N-carbazolyl, N-alkylcarbazolzyl, N-phthalimidyl, N-phenothiazinyl, N-alkylphenothiazinyl, or oxytriarylmethyl radical,
- R2 is an olefinically unsaturated radical comprising from 2 to 30 carbon atoms;
- R is an organic radical derived from an aliphatic or aromatic di- or polyisocyanate and comprising from 2 to 30 carbon atoms.
2 more elements
Dependencies are inferred from the claim text.