Dimerized thiourea derivatives near-infared absorbents comprising the same, and heat wave shielding materials comprising the same
A near-infrared absorbent is obtained by heating a dimerized thiourea derivative of Formula ?1! or ?2! and a copper compound: STR1 The near-infrared absorbent is used to obtain a near-infrared absorbent resin material having a wide absorption in the near-
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(2008/06/13)
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