发明授权
US5202450A Phthalic acid derivative metal salt and shading and light-responsive plate containing the metal salt 失效
酸性衍生金属盐和含金属盐的成色和光反应板

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 is composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film is 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.
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