Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-06-27
1995-10-24
Yoon, Tae H.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528 54, 528199, 528200, 528201, 528203, 528288, 528298, C08G 7300
Patent
active
054611369
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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Coates Clarence A.
Cushman Michael R.
Krutak James J.
Parham William W.
Patonay Gabor
Eastman Chemical Company
Graves, Jr. Bernard J.
Gwinnell Harry J.
Yoon Tae H.
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