Water-dissipatable polyesters and amides containing near infrare

Details Water-dissipatable polyesters and amides containing near infrare Water-dissipatable polyesters and amides containing near infrare

1994-05-05

1995-06-13

Acquah, Samuel A.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Condition responsive means controls separating means

528272, 528275, 528277, 528278, 528279, 528281, 528280, 528282, 528283, 528284, 528288, 528289, 528290, 528293, 528295, 528298, 528299, 528302, 528308, 5283086, 106 21R, 106 21A, 427 7, 209 33, 428480, 428481, 524602, 524603, 524604, 524605, 524608, 524610, B07C 500, C08G 7306

Patent

active

054234328

ABSTRACT:
Provided are water-dissipatable, sulfo-containing polyesters and polyester-amides having copolymerized therein thermally stable near infrared flourophoric compounds. The polymers are useful in coating or ink compositions, which are in turn useful for marking articles for identification/authentication purposes. Also provided is a method for invisibly marking such articles and a method for detecting and sorting articles by utilizing the near infrared flourophoric ink or coating compositions.

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