Novel phthalic acid derivative metal salt and shading and light-responsive plate containing the metal salt

摘要

A shading and light-responsive plate or film composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film composed of a trans­parent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.