Thermoplastic materials containing near infrared fluorophores

Details Thermoplastic materials containing near infrared fluorophores Thermoplastic materials containing near infrared fluorophores

1993-11-24

1995-03-14

Yoon, Tae H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 87, 524 89, 524 94, 524236, 524241, 209 33, C08K 534

Patent

active

053978196

ABSTRACT:
Provided is a method for tagging thermoplastic containers using near infrared fluorescing compounds or copolymerized residues readily capable of detection. Also provided is a method for identifying a thermoplastic container. Also provided are thermoplastic polymer compositions comprised of the near infrared fluorescing compounds or residues and articles comprised of such compositions. Also provided are new compounds useful as near infrared fluorophoric markers in the practice of this invention. The methods, compositions, and compounds of the present invention thus provide a total system useful for marking, for identification purposes, the various classes of thermoplastic wastes, so that they can be identified, sorted, and subsequently recycled.

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