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US 5,990,202 AGranted
Dual encapsulation technique for preparing ink-jets inks
AssigneeHewlett-Packard Company
InventorsKhe C Nguyen, Sivapackia Ganapathiappan
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AssigneeHewlett-Packard Company
InventorsKhe C Nguyen, Sivapackia Ganapathiappan
Estimating the term…
Ink-jet inks for ink-jet printing are provided which include a vehicle and a colorant, the colorant encapsulated by or associated with a primer core/shell polymer to form a primer/colorant combination, and the primer/colorant combination, upon printing on a print medium, encapsulated by a durable core/shell polymer. The primer core/shell polymer serves to provide adhesion of the durable core/shell polymer to the colorant and the durable core/shell polymer serves to provide a smear-fast film upon drying of the ink on a print medium. The primer core/shell polymer comprises a hydrophobic core and a hydrophilic shell comprising a polar component, while the durable core/shell polymer comprises a hydrophobic core comprising a low T.sub.g component, which, when homopolymerized, has a glass transition temperature, T.sub.g, below 25.degree. C. and a high T.sub.g component, which, when homopolymerized, has a glass transition temperature above 25.degree. C. and a hydrophilic shell selected from the group consisting of neutral shells, cationic shells, and anionic shells.
An ink-jet ink for inkjet printing including a vehicle and a colorant, said colorant encapsulated by or associated with a primer core/shell polymer to form a primer/colorant combination, and said primer/colorant combination, upon printing, encapsulated by a durable core/shell polymer, said primer core/shell polymer serving to provide adhesion of said durable core/shell polymer to said colorant and said durable core/shell polymer serving to provide a durable, smear-fast film upon drying of said ink on a print medium.
A dual encapsulated colorant wherein, upon printing on a print medium, said colorant is encapsulated by a primer core/shell polymer to form a primer-coated colorant, and said primer-coated colorant is encapsulated by a durable core/shell polymer.
A method for providing a durable, smear-fast colorant, said method comprising the steps of
A method for providing a durable, smear-fast colorant, said method comprising the steps of
A method for preparing a primer or additive polymer for use in a dual encapsulating system comprising said primer or additive polymer coating or associated with a colorant, respectively, and encapsulated with a durable core/shell polymer, said method comprising either
Dependencies are inferred from the claim text.