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PROCESS FOR PREPARATION OF OF COLORED INK COMPOSITIONS

IP.com Disclosure Number: IPCOM000025196D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 82K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a process for the preparation of colored ink compositions which comprises providing particles of polymeric compositions, such as particles of polyvinylacetate, adding thereto insoluble dyes, and subjecting the resulting composition to extensive mixing. Charge enhancing additives are also incorporated into the polymer particles for the purpose of imparting a positive charge thereto.

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PROCESS FOR PREPARATION OF OF COLORED INK COMPOSITIONS
J. Duff


K. Lok
R. Wong

Disclosed is a process for the preparation of colored ink compositions which comprises providing particles of polymeric compositions, such as particles of polyvinylacetate, adding thereto insoluble dyes, and subjecting the resulting composition to extensive mixing. Charge enhancing additives are also incorporated into the polymer particles for the purpose of imparting a positive charge thereto.

In one embodiment, a stabilized liquid immersion ink composition, useful for providing colored images in various printing devices, including the commercially available Versatec printer plotter, is prepared by grafting a vinylacetate monomer onto poly(2-ethyIhexylmethacryiate), 5 percent by weight to 10 percent by weight, in a hydrocarbon solvent, such as Isopar G, commercially available from Exxon, this grafting being accomplished in the presence of a free radical initiator, such as azobisisobutyronitrile, or benzoyl peroxide. Subsequently, there is added to the resulting mixture, from about 5 percent by weight to 50 percent by weight of a vinylacetate monomer, with from about 0.5 percent by weight of free radical initiator, such as azobisisobutyronitrile, or benzoyl peroxide for the purpose of effecting polymerization. There results spherical polymer particles with a site distribution of from about 0.10 to about 0.25 micrometers in diameter.

Thereafter, the resulting polyvinylacetate particles were diluted with further hydrocarbon material, so as to result in a...