US 11,126,081 B2 · Photopolymer composition

Abstract

The present disclosure relates to a photopolymer composition including: a polymer matrix or a precursor thereof; a photoreactive monomer including a polyfunctional (meth)acrylate monomer having a refractive index of 1.5 or less and a viscosity at 25° C. of 100 cps or less, and a monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more; and a photoinitiator, wherein a content of the monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more in the photoreactive monomer is 60 wt % or more. The present disclosure also relates to a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the photopolymer composition.

Claims16

Dependent claims

A photopolymer composition, comprising:

a polymer matrix or a precursor thereof;
a photoreactive monomer mixture comprising a polyfunctional (meth)acrylate monomer having a refractive index of 1.5 or less and a viscosity at 25° C. of 100 cps or less, and a monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more;
and
a photoinitiator,
wherein the content of the monofunctional (meth)acrylate monomer in the photoreactive monomer mixture is 70 wt % to 90 wt %,
wherein the polymer matrix is a reaction product of a compound having at least one isocyanate group and a polyol, and
wherein the polyol has a hydroxyl equivalent weight of 300 g/mol to 10,000 g/mol, and a weight average molecular weight of 100,000 to 1,500,000 g/mol.

4 more elements

Dependencies are inferred from the claim text.

Photopolymer composition

Life of this patent

Photopolymer composition

Life of this patent

Abstract

Claims16