Patent ID: 9039130
Filing Date: 2015-05-26
Classification: B41J,C09D

Abstract:
1. 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.