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US 9,039,130 B2Granted
Ink composition and method for ink jet recording
AssigneeSeiko Epson Corporation
InventorMasahiro Yatake
Life of this patent
Estimating the term…
Abstract
An ink composition for ink jet recording contains a polymer particle that has a core portion and a shell portion on a surface of the core portion. The core portion has a glass transition temperature of 0° C. or less, and the shell portion has a glass transition temperature of 20° C. or more. The difference between the glass transition temperature of the core portion and that of the shell portion is 30° C. or more.
Claims19
An ink composition for ink jet recording comprising
- a polymer particle having a core portion and a shell portion on a surface of the core portion, the core portion having a glass transition temperature of 0° C. or less and the shell portion having a glass transition temperature of 20° C. or more, wherein
- a difference between the glass transition temperature of the core portion and the glass transition temperature of the shell portion is 30° C. or more, wherein:
- a mass ratio c/s is in a range of 0.4 to 4, where c and s are a mass of the core portion and the shell portion, respectively, of the polymer particle;
- and
- a relation (c/s)/φ≧0.01 is satisfied where φ is a particle diameter of the polymer particle in nm.
2 more elements
Dependencies are inferred from the claim text.