Dual encapsulation technique for preparing ink-jets inks

Details Dual encapsulation technique for preparing ink-jets inks Dual encapsulation technique for preparing ink-jets inks

1997-12-24

1999-11-23

Jagannathan, Vasu

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523160, 523206, 523207, 525 71, 106 3127, 106 316, C08F26506, C08F26702, C08K 910, C08L 5100

Patent

active

059902027

ABSTRACT:
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.

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