TRANSPARENT ARTICLE AND PROCESS FOR PRODUCTION THEREOF

Title:

TRANSPARENT ARTICLE AND PROCESS FOR PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2006/137454

Kind Code:

A1

Abstract:

A transparent article comprising a substrate (1) and an organic-inorganic composite film (2) formed on the substrate (1), the organic-inorganic composite film (2) comprising silica as the inorganic oxide (main ingredient) and a light absorbent as at least a part of the organic substance, and the composite film (2) being not delaminated from the substrate (1) after subjecting the article to Taber abrasion test according to Japanese Industrial Standards (JIS) R 3212. The composite film (2) is formed from a coating solution containing a silicon alkoxide, a strong acid, water, an alcohol and an organic substance by sol-gel method. At least a part of the organic substance is a light absorbent. In the solution, for example, the content of the silicon alkoxide exceeds 3% by mass in terms of SiO₂ concentration, the molar concentration of protons by mass falls within the range from 0.001 to 0.2 mol/kg, and the number of moles of water is four times the total number of moles of the silicon atoms contained in the silicon alkoxide or higher. By employing the sol-gel method, a film having an excellent mechanical strength can be produced without the need of heating the substrate to a temperature higher than 400°C even when the film thickness is increased to 250 nm or more.

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Inventors:

SASAKI TERUYUKI (JP)
INOGUCHI KAZUYUKI (JP)
KAMITANI KAZUTAKA (JP)

Application Number:

PCT/JP2006/312442

Publication Date:

December 28, 2006

Filing Date:

June 21, 2006

Export Citation:

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Assignee:

NIPPON SHEET GLASS CO LTD (JP)
SASAKI TERUYUKI (JP)
INOGUCHI KAZUYUKI (JP)
KAMITANI KAZUTAKA (JP)

International Classes:

B32B9/00; B05D7/24; C03C17/30; C08J7/04; C08L101/00

Foreign References:

JP2002166488A	2002-06-11
JP2003277537A	2003-10-02
JPH08104546A	1996-04-23
JPH042635A	1992-01-07
JP2002301785A	2002-10-15
JPH0841441A	1996-02-13
JP2002338304A	2002-11-27
JPH11228184A	1999-08-24

Attorney, Agent or Firm:

Kamada, Koichi (TOMOE MARION BLDG. 4-3-1, Nishitenma, Kita-k, Osaka-shi Osaka 47, JP)

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