ULTRAVIOLET REFLECTIVE MATERIAL, METHOD FOR PRODUCING SAME, AND RAW MATERIAL COMPOSITION THEREFOR

Title:

ULTRAVIOLET REFLECTIVE MATERIAL, METHOD FOR PRODUCING SAME, AND RAW MATERIAL COMPOSITION THEREFOR

Document Type and Number:

WIPO Patent Application WO/2022/209840

Kind Code:

A1

Abstract:

Provided is an ultraviolet reflective material that exhibits a high reflectance in the wavelength range from the short-wavelength ultraviolet region that includes 200 nm to the long-wavelength ultraviolet region that includes 400 nm; that in particular exhibits a high reflectance in the UVC to UVB ultraviolet region from 200 to about 315 nm, which heretofore could not be reflected; and that more particularly exhibits a high reflectance in the short-wavelength ultraviolet region at and below 250 nm. Moreover, this ultraviolet reflective material does not discolor or deteriorate even when irradiated; exhibits an excellent light resistance, heat resistance, weathering resistance, flame retardancy, and thermal conductivity; suppresses ultraviolet-induced deterioration in the presence of heating and provides an excellent protective function; and is mechanically and chemically stable and can retain its white color on a long term basis while maintaining a high reflectance over a broad wavelength range. The ultraviolet reflective material 10, 20 has a reflectance of at least 60% at a wavelength of 405 nm and has an ultraviolet reflective layer 17a, 17b comprising a condensation-curable silicone resin and ultraviolet reflective filler particles 12a, 12b, 12c such as alumina, magnesium hydroxide, calcium fluoride, aluminum hydroxide, aluminum nitride, and silicon oxide.

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Inventors:

IGARASHI NAOTO (JP)

Application Number:

PCT/JP2022/011502

Publication Date:

October 06, 2022

Filing Date:

March 15, 2022

Export Citation:

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Assignee:

ASAHI RUBBER INC (JP)

International Classes:

G02B5/08; G02B5/26; H01L33/60

Foreign References:

JP2014005411A	2014-01-16
JP2011221518A	2011-11-04
JP2019068026A	2019-04-25
JP2012094776A	2012-05-17
JP2005037591A	2005-02-10
JP2013545131A	2013-12-19

Attorney, Agent or Firm:

SHINKYU PARTNERS P.C. (JP)

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