申请人:Nippon Paper Industries Co., Ltd.
公开号:US05723075A1
公开(公告)日:1998-03-03
A near-infrared absorbent is obtained by heating a dimerized thiourea derivative of Formula \x9b1! or \x9b2! 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-infrared region, and the absorbent does not substantially decompose at a molding temperature of the resin. Typical examples of the dimerized thiourea derivative are 4,4'-di(benzylthiocarbamoyl)-aminodiphenylmethane, 4,4'-di(benzylthiocarbamoyl)-aminodiphenylhexafluoropropane, and 1,4'-di(dibenzoylthiocarbamoylamino)-2,5-dimethylbenzene, and typical examples of the copper compound are copper stearate and copper .beta.-acryloyloxypropylhydrogenphthalate.
通过加热式1或式2的二聚硫脲衍生物和铜化合物,获得近红外吸收剂:##STR1## 该近红外吸收剂用于制备在近红外区域具有广泛吸收的近红外吸收树脂材料,且该吸收剂在树脂的成型温度下基本不分解。二聚硫脲衍生物的典型例子包括4,4'-二(苄基硫代氨基甲酰基)氨基二苯甲烷、4,4'-二(苄基硫代氨基甲酰基)氨基二苯基六氟丙烷和1,4'-二(二苯甲酰基硫代氨基甲酰基氨基)-2,5-二甲基苯,铜化合物的典型例子包括硬脂酸铜和β-丙烯酰氧基丙基氢邻苯二甲酸铜。