PHOTOCHROMIC OPTICAL ELEMENT

Title:

PHOTOCHROMIC OPTICAL ELEMENT

Document Type and Number:

WIPO Patent Application WO/2007/086320

Kind Code:

A1

Abstract:

[PROBLEMS] To solve the problem of failing in color development and fading in expected color tones which occurs in an optical element comprising a photochromic coat layer containing alkylamino-bearing photochromic compounds and/or dialkylamino -bearing photochromic compounds in a high concentration and a hard coat layer formed on the photochromic coat layer. [MEANS FOR SOLVING PROBLEMS] A photochromic optical element obtained by laminating an optical substrate, a photochromic coat layer, and a hard coat layer in this order, characterized in that: (I) the photochromic coat layer contains alkylamino -bearing photochromic compounds and/or dialkylamino-bearing photochromic compounds in a total amount of 0.1 to 10.0% by mass and (II) the hard coat layer is one obtained by curing a hard coat forming material comprising metal oxide fine particles and an organosilicon compound, which material contains as the organosilicon compound at least one member selected from the group consisting of tetraalkoxysilanes, methyltrialkoxy- silanes, and products of partial hydrolysis of them in an amount of 10 to 60% by mass based on the total mass of the metal oxide particles and the organosilicon compound (with the proviso that when the organosilicon compound is a product of partial hydrolysis of a partially hydrolyzable organosilicon compound, the mass of the organosilicon compound in terms of the hydrolyzable organosilicon compound is used in calculating the above total mass).

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Inventors:

MORI KATSUHIRO (JP)
KAWABATA YUICHIRO (JP)
KAWAGUCHI IKUMI (JP)
NAGOH HIRONOBU (JP)

Application Number:

PCT/JP2007/050777

Publication Date:

August 02, 2007

Filing Date:

January 19, 2007

Export Citation:

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Assignee:

TOKUYAMA CORP (JP)
MORI KATSUHIRO (JP)
KAWABATA YUICHIRO (JP)
KAWAGUCHI IKUMI (JP)
NAGOH HIRONOBU (JP)

International Classes:

G02B5/23; B32B27/00; B32B27/18; C09K9/02; G02B1/10; G02B1/14; G02C7/10

Domestic Patent References:

WO2003058300A1

2003-07-17

Foreign References:

JPH09269402A	1997-10-14
JPH1010301A	1998-01-16
JP2005023238A	2005-01-27
JP2004295114A	2004-10-21
JP2003128713A	2003-05-08

Other References: