The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1998
Filed:
Apr. 19, 1996
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Abstract
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-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.