Ink composition containing micro-encapsulated UV absorber and process for preparing the same
AssigneeBenq Corporation
InventorsIn-Shan Sir, Chia-Hsin Chien, Yu-Chang Shen
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Abstract
An ink composition containing a micro-encapsulated UV absorber. The ink composition includes a micro-encapsulated UV absorber, a dispersant, an emulsifer, at least one colorant, and a medium. The present invention adds a micro-encapsulated UV absorber to inkjet ink or screen printing ink. The micro-encapsulated UV absorber is suitable for either a water-based system or solvent-based system. The micro-encapsulated UV absorber increases the light-fastness and maintains longer-term light resistance because the UV absorber is gradually released from the microcapsule. The ink composition of the present invention provides excellent printing quality when used in inkjet or screen printing.
Claims30
An inkjet ink composition, comprising
- at least one colorant;
- an aqueous solution medium;
- a micro-encapsulated UV absorber homogeneously dispersed in the aqueous solution medium;
- a dispersant;
- and
- an emulsifier.
An ink composition for screen printing, comprising:
- at least one colorant;
- a medium;
- a micro-encapsulated UV absorber homogeneously dispersed in the medium;
- a dispersant;
- and
- an emulsifier.
A process for preparing an ink composition, comprising the following steps of:
- providing a medium to serve as a solvent;
- adding a colorant to the medium, wherein the colorant provides at least one color;
- adding a dispersant to the medium;
- adding an emulsifier to the medium;
- and
- adding a microcapsule to the medium to form a microcapsule solution, wherein the microcapsule contains an UV absorber,
- wherein the dispersant homogeneously disperses the microcapsule in the medium, and the emulsifier emulsifies the UV absorber gradually released from the microcapsule and homogeneously disperses the UV absorber in the medium.
Dependencies are inferred from the claim text.