Infrared radiation absorbent anthraquinone derivatives in polyester compositions
US4481314A · kind A · utility
31Cited by
9References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1983 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Jun 29, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are novel anthraquinone compounds containing tetra-p-phenylenediamine substituents, particularly useful in molding type polyester compositions and possessing strong infrared absorptivity. This property renders these compounds attractive as additives for increasing the infrared energy absorptivity of polyesters either from high intensity quartz lamps or from certain laser systems. These compounds are particularly useful in bottle polyester material for increasing the blow-mold parison reheat rate, and in the printing of plastic articles with lasers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.