Resin composition and display unit
AssigneeDexerials Corporation
InventorsYoshihisa Shinya, Yusuke Kamata
Life of this patent
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Abstract
A thin display unit that incorporates a high-luminance, high-contrast display part that is free of image detects caused by the deformation of the display part is provided. The display unit of the present invention includes an image display part 2 and a light-transmitting protective part 3 arranged on the image display part 2. A cured resin layer 5 is arranged between the display part 2 and the protective part 3. The cured resin layer 5 has a transmittance of 90% or higher in the visible range and a storage modulus at 25° C. of 1×107 Pa or less. The cured resin layer 5 is formed from a resin composition that has a cure shrinkage of 5% or less.
Claims8
An image display unit comprising:
- an image display part;
- a light-transmitting protective part arranged on the image display part;
- and
- a cured resin layer arranged between the image display part and the protective part,
- wherein:
- the cured resin layer is formed of a photocurable resin composition comprising:
- at least one polymer selected from the group consisting of polyurethane acrylate, polyisoprene acrylate, ester of polyisoprene acrylate, hydrogenated terpine resin, and butadiene polymer;
- at least one acrylate monomer selected from the group consisting of isobornyl acrylate, dicyclopentenyloxyethyl methacrylate, and 2-hydroxybutyl methacrylate;
- and
- at least one photopolymerization initiator;
- the cured resin layer has:
- a transmittance of 90% or higher in the visible range,
- a storage modulus at 25° C. of 1×107 Pa or less, and
- a cure shrinkage of 0 to 2.0%;
- and
- curing of the resin composition imparts an average surface roughness of 6 nm or less to a surface of the protective part or a surface of the image display part.
A method of producing an image display unit comprising an image display part, a light-transmitting protective part arranged on the image display part, and a cured resin layer arranged between the image display part and the protective part, comprising:
- providing a photocurable resin composition between the image display part and the protective part, the photocurable resin composition comprising:
- a butadiene polymer,
- at least one acrylate monomer selected from the group consisting of isobornyl acrylate, dicyclopentenyloxyethyl methacrylate, and 2-hydroxybutyl methacrylate, and
- a photopolymerization initiator for curing the at least one acrylate monomer, the photopolymerization initiator including a photopolymerization initiator for the visible range together with a photopolymerization initiator for the ultraviolet range;
- and
- irradiating the photocurable resin composition with ultraviolet rays to cure the photocurable resin composition, thereby forming the cured resin layer having a transmittance of 90% or higher in the visible range, a storage modulus at 25° C. of from 1×103 to 1×106 Pa, and a cure shrinkage of 0 to 2.0%;
- wherein curing of the resin composition imparts an average surface roughness of 6 nm or less to a surface of the image display part or a surface of the protective part.
Dependencies are inferred from the claim text.