Patent ID: 11859026
Assignee: NOURYON CHEMICALS INTERNATIONAL B.V.
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of making a composition comprising a functionalized pyranine monomer, the method comprising the steps of
providing a starting amount of pyranine in an aqueous solvent system,
adding an amount of base to the aqueous solvent system,
dosing to the aqueous solvent system an amount of a polymerizable functionalizing agent to form a reaction mixture, thereby initiating the reaction of the pyranine with the functionalizing agent to functionalize the pyranine molecule with a polymerizable functional group, and
maintaining the dosing of the functionalizing agent to the reaction mixture during the reaction of the pyranine with the functionalizing agent until the amount of functionalizing agent dosed to the system exceeds the starting amount of pyranine on a molar basis;
wherein said composition once made comprises less than 5 mol % unfunctionalized pyranine, based on the total amount of unfunctionalized pyranine and functionalized pyranine.