Abstract:
POLYIMINE-AMIDE RELASE COATING AGENTS PARTICULARLY USEFUL ON PRESSURE-SENSITIVE ADHESIVE TAPES. THE POLYIMINE-AMIDE RELEASE AGENTS ARE POLY-N-ACYL-IMINES, WHICH ARE ACYL DERIVATIVES OF POLYALKYLIMINES HAVING A STRAIGHT OR BRANCH CHAIN, OR ACYL DERIVATIVES OF A POLYAMIDE OR A POLYALKYLIMINE AND A DICARBOXYLIC ACID, WHEREIN SAID POLYAMIDE HAS A PLURALITY OF PRIMARY OR SECONDARY AMINO GROUPS.
Abstract:
A TRANSFER-PROOF INK PARTICULARLY SUITABLE FOR PRINTING ON THE BACKING OF PRESSURE-SENSITIVE ADHESIVE WEBS SUCH AS TAPES, SAID INK CONTAINING A COMPATIBLE TRANSFER-PROOFING AGENT SOLUBLE IN THE INK SOLVENT BUT SUBSTANTIALLY INSOLUBLE IN BOTH BACKING AND ADHESIVE LAYERS OF WEB. THE INVENTION INCLUDES PRESSURE-SENSITIVE WEBS WHICH HAVE PRINTED MATTER ON THE NON-ADHESIVE SIDE OF SAID WEBS AND WHICH CAN BE WOUND AND UNWOUND IN THE USUAL MANNER WITHOUT TRANSFER TO EITHER INK OR ADHESIVE TO THE ADJACENT SIDE, THE PRINTED MATTER OF SAID WEBS BEING FORMED FROM THE TRANSFER-PROOFING INK OF THIS INVENTION.