Patent ID: 7121659

Claim:
A water dispersion for ink jet recording, comprising water-insoluble vinyl polymer particles containing a colorant, the water-insoluble vinyl polymer being a water-insoluble vinyl polymer obtained by polymerizing a monomer mixture of: (A) a monomer represented by the formula (I): wherein R 1 represents a hydrogen atom or a lower alkyl group, R 2 represents an alkylene group having 2 to 18 carbon atoms or an alkylene group having 2 to 4 carbon atoms in which a phenyl group is substituted for a hydrogen atom thereof, n denotes a number from 2 to 30 and R 3 represents a straight or branched alkyl group having 8 to 30 carbon atoms; (B) a monomer containing a salt-forming monomer; and (C) a hydrophobic monomer.