INK SET - KAO CORP

Title:

INK SET

Document Type and Number:

WIPO Patent Application WO/2001/048099

Kind Code:

A1

Abstract:

An ink set comprising a black ink and a color ink, wherein the black ink comprises an aqueous dispersion of water-insoluble vinyl polymer particles containing either an oil-soluble black dye or carbon black, the vinyl polymer particles have the ionicity opposite to that of the color ink, and the vinyl polymer is a water-insoluble vinyl polymer obtained by copolymerizing (a) a monomer containing a salt-forming group, (b) a monomer represented by the formula (I): CH¿2?=C(R?1¿)COO(R?2¿O)¿p?R?3¿ (wherein R?1¿ represents hydrogen or lower alkyl; R?2¿ represents a divalent hydrocarbon group optionally having a heteroatom; R?3¿ represents a monovalent hydrocarbon group optionally having a heteroatom; and p is a number of 1 to 60), (c) a macromer, and (d) a monomer copolymerizable with these. The ink set is satisfactory not only in fixability and water resistance but in bleeding resistance and suitability for ink delivery. It is usable as an ink set for ink-jet recording to give extremely clear printed characters.

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Inventors:

NAKANO YUKIHIRO (JP)
NAGASHIMA SHIGEKI (JP)
KUBO HIROKI (JP)
SAWADA MICHITAKA (JP)

Application Number:

PCT/JP2000/009273

Publication Date:

July 05, 2001

Filing Date:

December 26, 2000

Export Citation:

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Assignee:

KAO CORP (JP)
NAKANO YUKIHIRO (JP)
NAGASHIMA SHIGEKI (JP)
KUBO HIROKI (JP)
SAWADA MICHITAKA (JP)

International Classes:

B41M5/00; C08F290/06; B41J2/01; C09D11/00; C09D11/322; C09D11/324; C09D11/328; (IPC1-7): C09D11/00

Foreign References:

JP2000191972A	2000-07-11
EP0857766A1	1998-08-12
EP0791610A2	1997-08-27
JPH1161017A	1999-03-05
EP0692527A2	1996-01-17
EP0864437A1	1998-09-16
EP0953616A2	1999-11-03
US5713993A	1998-02-03

Other References: