Desensitizing ink for the printing of self-copying sheets

Details Desensitizing ink for the printing of self-copying sheets Desensitizing ink for the printing of self-copying sheets

1989-02-15

1991-07-30

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

503201, 503205, 560157, 560159, C09D 1100

Patent

active

050357433

ABSTRACT:
New nucleophilic urethanes are described and claimed, which are the reaction product of a monoisocyanate, a diisocyanate or a polyisocyanate with a basic alkoxylated amine whose hydroxyl functionality has been adjusted to a value of 0.5 to 2 by etherification, esterification and/or reaction with a monoisocyanate. These compounds are particularly used, individually or as a mixture, as neutralizing nucleophilic compositions in desensitizing inks for the printing by dry or humid offset, typographic, or flexographic methods, destined to locally neutralize the electrophilic layer of a chemical pressure sensitive copying set. The disclosed compounds have a better neutralizing power which allows to reduce the weight per surface unit of the desensitizing printing by at least a third.

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