Method for grafting a coloured indicator onto a solid substrate and implementation kit
US10712284B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Oct 2, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/78
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for grafting, in a covalent manner, a coloured indicator having at least one aromatic primary amine function onto the surface of a solid substrate, including the steps that consist of: (a) preparing, from the coloured indicator having at least one aromatic primary amine function, the corresponding diazonium salt; (b) placing the solid substrate in contact with a solution containing the diazonium salt prepared in step (a) and subjecting the solution to non-electrochemical conditions for an optimal grafting time whereby organic chains in which the units are derivatives of the diazonium salt are grafted, in a covalent manner, onto the surface of the solid substrate; (c) washing the solid substrate thus grafted; (d) repeating steps (b) and (c) or possibly steps (a) to (c) at least once. The present invention also relates to a kit for implementing such a method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.