Pressure sensitive correction composition and method of use
AssigneeInternational Business Machines Corporation
InventorsFred M. Creekmore, Dorothy J. Kennair, Benjamin F. Livingston, Joseph J. Sabad
Life of this patent
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Abstract
Low tack pressure sensitive compositions containing a paraffinic wax and/or polyethylene resin, a tackifier, an isobutylene polymer, and a copolymer of ethylene and/or propylene and a monoethylenically unsaturated ester; and use thereof to remove erroneously typed images from a substrate.
Claims31
A low tack pressure sensitive composition comprising:
- (a) about 5-35% by weight of a material selected from the group of paraffinic wax, polyethylene reisn, or mixtures thereof, and wherein said paraffinic wax is selected from the group of paraffin wax, synthetic polyolefin wax, or mixtures thereof;
- (b) about 20-65% by weight of a hydrocarbon tackifying polymer;
- (c) about 7-25% by weight of a tacky, semisolid isobutylene polymer having a viscosity average molecular weight (FLORY) of at least about 40,000;
- and
- (d) about 10-48% by weight of a copolymer of an olefin selected from the group of ethylene, propylene, or mixtures thereof;
- and a monoethylenically unsaturated ester wherein the copolymer contains about 18 to about 40% by weight of said ester.
A low tack pressure sensitive lift-off correction element for removing typewritten characters from a substrate which comprises a support member having coated on one side thereof a low tack pressure sensitive composition comprising:
- (a) about 5-35% by weight of a material selected from the group of paraffinic wax, polyethylene resin, or mixtures thereof;
- (b) about 20-65% by weight of a hydrocarbon tackifying polymer;
- (c) about 7-25% by weight of a tacky, semisolid isobutylene polymer having a viscosity average molecular weight (FLORY) of at least about 40,000;
- and
- (d) about 10-48% by weight of a copolymer of an olefin selected from the group of ethylene, propylene, or mixtures thereof;
- and a monoethylenically unsaturated ester wherein the copolymer contains about 18 to about 40% by weight of said ester.
A low tack pressure sensitive composition suitable for removing typewritten characters from a substrate comprising:
- (a) about 5-15% by weight of a material selected from the group of paraffinic wax, polyethylene resin, or mixtures thereof;
- (b) about 20-65% by weight of a hydrocarbon tackifying polymer;
- (c) about 7-25% by weight of a tacky, semisolid isobutylene polymer having a viscosity average molecular weight (FLORY) of at least about 40,000;
- and
- (d) about 10-48% by weight of a copolymer of an olefin selected from the group of ethylene, propylene, or mixtures thereof;
- and a monoethylenically unsaturated ester wherein the copolymer contains about 18 to about 40% by weight of said ester.
Dependencies are inferred from the claim text.