Water-dissipatable polyesters and amides containing near infrared fluorescent compounds copolymerized therein
US5292855A · kind A · utility
97Cited by
26References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3179
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided are water-dissipatable, sulfo-containing polyesters and polyester-amides having copolymerized therein thermally stable near infrared flourophoric compounds. The polymers are useful in coating or ink compositions, which are in turn useful for marking articles for identification/authentication purposes. Also provided is a method for invisibly marking such articles and a method for detecting and sorting articles by utilizing the near infrared flourophoric ink or coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.