POLYURETHANE PREPOLYMER-BASED COMPOSITIONS BASED FOR PRODUCTION OF HOLOGRAPHIC MEDIA Russian patent published in 2014 - IPC C08G18/10 C08G18/32 C08G18/48 C08G18/66 C08G18/67 C08G18/78 C08L75/04 G03F7/00 G11B7/245 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to polyurethane composition for production of holographic media. Composition contains: (A) polyisocyanate component, which contains at least one polyurethane prepolymer with terminal NCO-groups exclusively on base of oligomeric or polymeric dysfunctional compounds, reaction-able with respect to isocyanates, with average molecular weights from 200 to 10000 g/mole, in which NCO-groups are bound with primary residues, (B) polymers, reaction-able with respect to isocyanates, (C) compounds, which contain groups, which when exposed to actinic irradiation react with ethylene-unsaturated compounds with polymerisation (radiation - solidified groups), and themselves do not contain NCO-groups, (D) stabilisers of radicals and (E) photoinitiators, with compounds, applied in component C), having refractive index n_D ²⁰>1.55. Also described are: method of producing medium of recording of visual holograms, application of such medium and method of hologram recording.

EFFECT: obtaining novel polyurethane composition, in which good compatibility of polymeric matrix with recording monomer and other components, contained in composition is ensured, which leads to improvement of hologram brightness.

12 cl, 2 dwg, 7 ex