Nippon Mitsubishi Oil Corporation

Noboru Takaesu

Yoshinori Nishikitani

Masaki Minami

Tsuyoshi Asano

Tuyoshi Asano

An ultraviolet absorbing material prepared by reacting (a) an aminosilane compound of general formula (1) or a derivative thereof wherein R,is C,-C,alkylene or &mdash;(CH,),&mdash;NH&mdash; (wherein m is an integer of 1 to 4); R,3 s are each independently hydrogen, hydroxyl, halogeno, C,-C,alkyl or C,-C,alkoxy, with the proviso that at least one of R,is C,-C,alkoxy; and n is an integer of 0 or above with (b) an ultraviolet absorber having a carboxyl group in the molecule in such a way as to form an amide linkage resulting from the above aminosilane compound or derivative thereof. This material can form an ultraviolet absorbing layer and is favorably applicable to ultraviolet-absorbing glass (ultraviolet absorbing plate), optical devices and light modulators.

Ultraviolet absorbing material and ultraviolet absorbing plate

An electrochromic device comprising a pair of electrically conductive substrates disposed facing each other and each having at least on its inner surface an electrode at least one of said electrically conductive substrates comprising a transparent substrate and a transparent electrode, an ion conductive material inserted between said pair of electrically conductive substrates, an electrochromic material-containing layer disposed between either one of said electrodes and said ion conductive material and an ultraviolet absorptive layer disposed between either at least one of said transparent substrates and the electrode disposed thereover or on the surface of said transparent substrate opposite to the transparent electrode disposed thereover, said ultraviolet absorptive layer being formed by coating and curing on the surface at said transparent substrate a reaction product of (A) an aminosilane compound of the formula (I) or the derivative thereof and (B) an ultraviolet absorptive material having in its molecules a carboxyl group,

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Yokohama, Japan

Noboru Takaesu