Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Masatoshi Matsuo

Masato Inoue

Kazunori Tanaka

Kenji Nagao

Yutaka Hashimoto

Yoshimasa Tanaka

A cationic polyurethane resin aqueous dispersion wherein a cationic polyurethane resin (B) including a structural unit (A) represented by the following general formula (I) is dispersed in aqueous medium, and the content of a cationic amino group of the structural unit (A) in the cationic polyurethane resin (B) is 0.005 to 1.5 equivalents/kg. (In the formula, Rrepresents an alkylene group which may include an alicyclic structure, a residue of bivalent phenol or polyoxyalkylene group, Rand Reach independently represents an alkyl group which may include an alicyclic structure, and Rrepresents a hydrogen atom or a residue of the quaternizing agent which is introduced by the quaternizing reaction, and Xrepresents an anionic counter ion.)

Cationic polyurethane resin aqueous dispersion, ink-jet receiving agent including the same, and ink-jet recording medium using the same

A cationic polyurethane resin aqueous dispersion wherein a cationic polyurethane resin (B) including a structural unit (A) represented by the following general formula (I) is dispersed in aqueous medium, and the content of a cationic amino group of the structural unit (A) in the cationic polyurethane resin (B) is 0.005 to 1.5 equivalents/kg. (In the formula, R, represents an alkylene group which may include an alicyclic structure, a residue of bivalent phenol or polyoxyalkylene group, Rand Reach independently represents an alkyl group which may include an alicyclic structure, and Rrepresents a hydrogen atom or a residue of the quaternizing agent which is introduced by the quaternizing reaction, and Xrepresents an anionic counter ion.)

An aqueous resin composition is provided which does not use a high boiling point solvent, and yet displays favorable long term stability and excellent film formation, and does not suffer from problems such as skin generation. The aqueous resin composition comprises a water soluble magnesium salt (A) and an aqueous polyurethane (B).

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Izumiotsu, Japan

Masatoshi Matsuo