HIGHLY FLUORESCENT MARKERS FOR FLUIDS OR ARTICLES

摘要

The present invention provides highly fluorescent markers, made from a reactive polymer and an isocyanate, that fluoresce in the ultraviolet or near infrared region without being visible to the human eye at low concentrations in the fluid or article being marked. The molecular weight and fluorescence emission wavelength of these highly fluorescent marker compounds can be adjusted to provide a multitude of markers with unique fluorescence signatures.

主权项

1. A highly fluorescent compound comprising the reaction product of:
at least one fluorophore-containing reactive polymer, optionally containing a polyamine unit of the formula NCH2CH2N; and at least one unsubstituted or substituted aryl isocyanate or an unsubstituted or substituted aliphatic or cycloaliphatic isocyanate, at an isocyanate index of about 100 or less, wherein the highly fluorescent compound emits fluorescence in the ultraviolet (UV), visible, or near infrared (IR) region.