申请人:Yamaha Corporation
公开号:US05296607A1
公开(公告)日:1994-03-22
In chemical structure of a fulgide type photochromic compound having the following general formula; ##STR1## introduction of electron donative groups into its heteroaromatic structure is effective in improving the long wave length sensitivity without any lowering in its thermal stability. Thanks to such combined functional properties, the products are advantageously used for optical recording media, copying media, printing media, optical filters and display materials.
在具有以下一般式的fulgide型光致变色化合物的化学结构中; ##STR1##将电子给予基团引入到其杂环芳香结构中,可以有效地提高其长波长敏感性,而不会降低其热稳定性。由于这种组合的功能特性,该产品被优选地用于光学记录介质、复制介质、印刷介质、光学滤波器和显示材料。