Chemically substituted chromophores and fluorophores of high solubility and their use as fluid visualizing agents
US6251302A · kind A · utility
0Cited by
16References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Jan 15, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides, a 3 or 4-amino-1,8-naphthalimide compound having polyether substituent groups at the 3 or 4-position and the imide position. The polyether groups are linked to a hydrocarbon directly linked at the 3 or 4-amino position and the imide position. The polyether groups render the 3 or 4-amino-1,8-naphthalimide compound sufficiently soluble in a fluid such that visualization of the fluid by color or fluoresence is allowed. In one advantageous embodiment, the 3 or 4-amino-1,8-naphthalimide is obtained from the mixture of 4-chloro-1,8-naphthalic anhydride with monoamine polyether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.