Dimerized thiourea derivatives near-infared absorbents comprising the same, and heat wave shielding materials comprising the same
US5723075A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Apr 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/405
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.