Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1996-02-29
1997-12-30
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540123, 540124, 540125, 540127, 540128, C07D48722, C07B 4724
Patent
active
057032297
ABSTRACT:
Provided are new compounds useful as near infrared fluorophoric markers. In the practice of this invention a method is also provided for tagging thermoplastic containers using near infrared fluorescing compounds or copolymerized residues readily capable of detection. The new compounds are phthalocyanine and naphthalocyanine derivatives which are covalently bonded to substituted silicon and aluminum compounds. The methods, compositions, and compounds described herein 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.
Harding Karen A.
Heath, Jr. William P.
Shah Mukund J.
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