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AssigneeCaribonum Limited
InventorsIan Hogarth, Andrew Scott, Christine Abbott, Robert I. Wilkinson
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The invention relates to a pressure-activatible correcting tape, which has a conventional carrier and a lift-off layer for removing typed or printed type images, the lift-off layer containing a wax, a binder and optionally further additives. This correcting tape is characterized in that the lift-off layer contains approximately 5 to 35% by weight of butyl rubber, approximately 30 to 90% by weight of wax and approximately 0.1 to 5% by weight of a dispersant having a dispersing action in an aqueous medium for the aforementioned substances. The lift-off layer can be produced by means of an aqueous coating liquid, which is environmentally advantageous compared with organic dispersants. This correcting tape can be used without restriction and independently of the type of typewriter.
A coating composition for applying a lift-off layer to a carrier for removing typewritten or printed images, said composition comprising an aqueous medium and a dispersion of substances therein of approximately 5 to 35% by weight of a butyl rubber component in the form of a copolymer of 95 to 99% isobutylene and 1 to 5% of a monomer selected from the group which consists of isoprene, butadiene and mixtures thereof, and including an effective amount of vinyl acetate/ethylene copolymer to function as an adhesion promoting agent, said composition further comprising approximately 30 to 90% by weight wax and approximately 0.1 to 5% by weight of a dispersant for dispersing said wax and said butyl rubber component in said aqueous medium, said weights being based on total weight of said substances and said substances being present in said aqueous medium in an amount from 40 to 65% by weight of the composition.
Dependencies are inferred from the claim text.