Resin composition, aqueous ink for ink jet recording, ink jet recording device, and ink jet recording method
A resin composition includes: resin particles including a resin; water; a first solvent having a boiling point of less than 250° C.; and a second solvent having a boiling point of 250° C. or more. A relative energy difference (RED), R a /R 0 , in the Hansen solubility parameter (HSP) system between the second solvent and the resin is 3 or less. R a is an HSP distance between the second solvent and the resin. R 0 is a radius of a Hansen sphere of the resin. The Hansen sphere is determined so as to include coordinates of solvents having a boiling point of 250° C. or more in which the resin is dissolvable. A mass ratio of the second solvent to a solid component the resin particles in the resin composition is 0.7 to 2.3.
1 . A resin composition comprising:
resin particles comprising a resin;
water;
a first solvent having a boiling point of less than 250° C.; and
a second solvent having a boiling point of 250° C. or more,
wherein:
a relative energy difference (RED), R a /R 0 , in the Hansen solubility parameter (HSP) system between the second solvent and the resin is 3 or less;
R a is an HSP distance between the second solvent and the resin;
R 0 is a radius of a Hansen sphere of the resin, the Hansen sphere being determined so as to include coordinates of solvents having a boiling point of 250° C. or more in which the resin is dissolvable;
a mass ratio of the second solvent to a solid component of the resin particles in the resin composition is 0.7 to 2.3; and
an amount of the second solvent in the resin composition relative to a total mass of the resin composition is 7% by mass or more.
2 . The resin composition according to claim 1 ,
wherein a mass ratio of the second solvent to the first solvent in the resin composition is 0.3 to 3.0.
3 . The resin composition according to claim 2 ,
wherein mass ratio of the second solvent to the solid component of the resin particles in the resin composition is 0.9 to 2.0, and
wherein a total amount the first solvent and the second solvent in the resin composition relative to the total mass of the resin composition is 30% by mass or less.
4 . An aqueous ink for ink jet recording, comprising:
the resin composition according to claim 1 ; and
a pigment.
5 . An ink jet recording device comprising:
the resin composition according to claim 1 ;
a flow path through which the resin composition flows; and
an applying unit connecting to the flow path and configured to apply the resin composition onto an object for recording.
6 . An ink jet recording device comprising:
the aqueous ink according to claim 4 ;
a flow path through which the aqueous ink flows; and
an applying unit connecting to the flow path and configured to apply the aqueous ink onto an object for recording.
7 . An ink jet recording method comprising:
applying the resin composition according to claim 1 onto a recording medium by an ink jet method.
8 . An ink jet recording method comprising:
applying the aqueous ink according to claim 4 onto a recording medium by an ink jet method.
9 . The ink jet recording method according to claim 7 , further comprising:
heating a portion of the recording medium on which the resin composition is applied at a temperature of 90° C. or more to dry the portion.
10 . The ink jet recording method according to claim 8 , further comprising:
heating a portion of the recording medium on which the resin composition is applied at a temperature of 90° C. or more to dry the portion.