PROCESS FOR PRODUCING PIGMENT-CONTAINING MODIFIED POLYMER PARTICLES

Title:

PROCESS FOR PRODUCING PIGMENT-CONTAINING MODIFIED POLYMER PARTICLES

Document Type and Number:

WIPO Patent Application WO/2016/104505

Kind Code:

A1

Abstract:

The present invention relates to: [1] a process for producing pigment-containing modified polymer particles, the process comprising reacting, in a medium, pigment-containing polymer particles (A) with a compound (B) having one reactive group that reacts with a functional group of the polymer particles (A), under such conditions that the ratio of the total number of moles of reactive groups of the compound (B) to the total number of moles of functional groups of the polymer particles (A), (B)/(A), is 0.10-0.62; [2] an aqueous pigment dispersion comprising an aqueous medium and, dispersed therein, modified polymer particles obtained by the process; and [3] an ink comprising the aqueous pigment dispersion and an organic solvent. The modified polymer particles are free from the formation of coarse particles during production of pigment particles. The ink, when being concentrated by water vaporization, is inhibited from increasing in viscosity. When printed on a lowly water-absorbing recording medium, the ink gives a print having excellent scratch resistance.

Inventors:

SATO TAKAHIRO (JP)
UEDA YASUFUMI (JP)

Application Number:

PCT/JP2015/085839

Publication Date:

June 30, 2016

Filing Date:

December 22, 2015

Export Citation:

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Assignee:

KAO CORP (JP)

International Classes:

C08J3/03; B41J2/01; B41M5/00; C09D11/037; C09D11/322

Foreign References:

JP2008150535A	2008-07-03
JP2008156463A	2008-07-10
JP2010143961A	2010-07-01
JP2008531762A	2008-08-14
JP2004217788A	2004-08-05
JP2006146191A	2006-06-08
JP2006321932A	2006-11-30
JP2000212367A	2000-08-02

Other References: