Plastic and nonmetallic article shaping or treating: processes – Encapsulating normally liquid material – Liquid encapsulation utilizing an emulsion or dispersion to...
Patent
1995-03-02
1996-12-17
Nutter, Nathan M.
Plastic and nonmetallic article shaping or treating: processes
Encapsulating normally liquid material
Liquid encapsulation utilizing an emulsion or dispersion to...
B01J 1302, B01J 1304
Patent
active
055850510
ABSTRACT:
Microcapsules containing a solution or dispersion of a colorant, especially a solution of an oil-solubilized sulfur dye, in an organic liquid having a vapor pressure below 20 mm Hg at 25.degree. C. can be coated on a side of a sheet of paper for use in pressure-sensitive carbonless copy systems. The solutions of the oil-solubilized sulfur dyes, i.e. 1) colored products of the oxidation of a leuco sulfur dye, leuco sulfurized vat dye or reaction product of a leuco dye or sulfurized vat dye with a cationic compound and 2) colored reaction products of a solubilized sulfur dye with a cationic compound also constitute an aspect of the invention, as do microcapsules whose walls contain an opacifying agent incorporated therein.
REFERENCES:
patent: 3369900 (1968-02-01), Taylor
patent: 3645911 (1972-02-01), van Besauw et al.
patent: 4798741 (1989-01-01), Nelson
Agarwal Niraj
Hosie Lynn
Sie Maria W.
Whitley David A.
Battle Carl W.
Doyle Thomas C.
Honor Robert S.
Nutter Nathan M.
Sandoz Ltd.
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