Mitsubishi Kasei Corporation

Nissan Motor Co., Ltd. Yokohama

Yasuo Tateoka

Masashi Ito

Tetsuo Murayama

Shuichi Maeda

Kazuo Mitsuhashi

A photochromic material to be used for a photosensitive arrangement such as photosensitive laminated glass. The photochromic material is formed of a high polymer substrate material containing photochromic spirooxazine compound as expressed by the following general formula: ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are at least one selected from the group consisting of alkyl group, alkenyl group, cycloalkyl group and aryl group; R.sup.4 is one selected from the group consisting of hydrogen atom and alkyl group having the number of carbon atoms ranging from 1 to 5; rings X and Y are at least one selected from the group consisting of hydrocarbon aromatic ring and heterocyclic aromatic ring; and Z is one selected from the group consisting of oxygen atom and sulfur atom. Additionally, a triplet state quencher such as nitroxy free radical is contained in the high polymer substrate material, thereby suppressing generation of deterioration substance due to irreversible reaction of spirooxazine molecules.

Growing community of inventors

Machida, Japan

Yasuo Tateoka