Novel correction compositions and process for using same
AssigneeThe Gillette Company
InventorsLamar E. Brooks, Sue R. Liu
Life of this patent
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Abstract
Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible correcting marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.
Claims22
A composition for correcting a marking on the surface of a pressure-sensitive chemical recording medium including a developer material comprising an acidic developer, said marking having been provided by interaction of the developer material with a color-providing material, said composition consisting essentially of a substantially uniform dispersion of from about 30 to about 70 parts by weight of an opacifying pigment, from about 3 to about 20 parts by weight of a soluble polymeric film-forming binder material, from about 0.5 to about 15 parts by weight of a Lewis acid and from about 80 to about 125 parts by weight of a solvent for the binder material, said composition providing a film which can cover the marking and can provide a visible corrected marking on contact with a pattern of said color-providing material corresponding to the corrected marking.
A correction fluid composition consisting essentially of the following ingredients in amounts based on parts by weight of the total weight of the composition:
- a. from about 80 to about 125 parts by weight of a non-flammable organic solvent having a boiling point between about 60.degree. to about 85.degree. C.,
- b. from about 30 to about 70 parts by weight of a pigment comprising a titanium dioxide,
- c. from about 3 to about 20 parts by weight of a polymeric film-forming binder material which is soluble in said solvent,
- d. from about 0.5 to about 15 parts by weight of a Lewis acid selected from the group consisting of AlCl.sub.3, ZnCl.sub.2, CaCl.sub.2, acidic clays and acidic polymers or mixtures of these,
- e. from 0 to about 10 parts by weight of a plasticizer to improve the flexibility or adhesion of the film,
- f. from 0 to about 10 parts by weight of a dispersing agent, and
- g. from 0 to about 5 parts by weight of a thickening agent.
A composition for correcting a marking on the surface of a pressure-sensitive chemical recording medium including a developer material comprising an acidic developer, said marking having been provided by interaction of the developer material with a color-providing material, said composition consisting essentially of a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming binder material, a solvent for the binder, and a Lewis acid selected from the group consisting of AlCl.sub.3, ZnCl.sub.2, CaCl.sub.2, acidic clays, and acidic polymers or mixtures of these, and in amounts effective so that the dispersion forms a film which can cover the marking and can provide a visible corrected marking on contact with a pattern of said color-providing material corresponding to the corrected marking.
Dependencies are inferred from the claim text.