Pressure-sensitive copying paper sheets

Details Pressure-sensitive copying paper sheets Pressure-sensitive copying paper sheets

B - Operations, Transporting

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42/15

B01J 13/16 (2006.01) B41M 5/165 (2006.01) C07D 273/04 (2006.01) C08G 18/78 (2006.01)

Patent

CA 1121159

PRESSURE-SENSITIVE COPYING PAPER SHEETS Abstract of the Disclosure Pressure-sensitive copying paper containing a solution of a dye-precursor agent in microencapsulated form, wherein the dye-precursor agent is dissolved in a hydro- phobic organic solvent and encapsulated in capsules composed of the polyaddition product of a diisocyanate of Formula (I) Image (I) wherein R represents a divalent aliphatic radical, and a diamine. Le A 18 225

309949

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