Title:
COMPOSITION FOR FORMING LIGHT-SCATTERING LAYER, AND COMPOSITION FOR FORMING WAVELENGTH-CONVERTING LAYER
Document Type and Number:
WIPO Patent Application WO/2023/112798
Kind Code:
A1
Abstract:
[Problem] To provide: a composition for forming a light-scattering layer, in which the precipitation of titanium oxide particles, which are large particles for light scattering purposes and having high refractive indexes, is prevented; and a composition for forming a wavelength-converting layer, which comprises the above-mentioned composition and a phosphor added to the composition. [Solution] Provided is a composition for forming a light-scattering layer, the composition comprising titanium oxide particles (A) having an average primary particle diameter of 110 nm to 500 nm, a phosphoric acid ester (B) having a weight average molecular weight of 1000 to 100000 and a polymerizable monomer (C). In the composition for forming a light-scattering layer, when, with respect to a cumulative diameter (nm) of the titanium oxide particles (A) which is determined from a particle size distribution measurement value obtained by a dynamic light-scattering method, (D50)/(D10) is defined as DS and (D90)/(D50) is defined as DL wherein D10 represents a 10% cumulative diameter, D50 represents a 50% cumulative diameter and D90 represents a 90% cumulative diameter, the titanium oxide particles (A) have a DS/DL ratio of 0.4 to 1.8 and a (D50)/(average primary particle diameter) ratio of 1.0 to 2.0. Also provided is a composition for forming a wavelength-converting layer, the composition comprising the composition for forming a light-scattering layer and a phosphor.
Inventors:
KIMATA MASAKI (JP)
YAMAGUCHI MASATO (JP)
YUKAWA SHOJIRO (JP)
YAMAGUCHI MASATO (JP)
YUKAWA SHOJIRO (JP)
Application Number:
PCT/JP2022/045125
Publication Date:
June 22, 2023
Filing Date:
December 07, 2022
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
G02B5/20; C08F2/44; C08K3/22; C08K5/521; C08L33/00; C08L63/00; C08L101/00
Foreign References:
| JP2020166131A | 2020-10-08 | |||
| JP2021103212A | 2021-07-15 |
Other References:
TAKEDA MASAYOSHI, TANABE EISHI, IWAKI TORU, YABUKI AKIHIRO, OKUYAMA KIKUO: "Preparation of Transparent Nanocomposite Microspheres via Dispersion of High-Concentration TiO2 and BaTiO3 Nanoparticles in Acrylic Monomer", JOURNAL OF THE SOCIETY OF POWDER TECHNOLOGY, JAPAN, vol. 45, 1 January 2008 (2008-01-01), pages 23 - 29, XP093072729, DOI: 10.4164/SPTJ.45.23
Attorney, Agent or Firm:
HANABUSA PATENT & TRADEMARK OFFICE (JP)
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