WATER-BASED RECORDING INK - SEIKO EPSON CORP

Title:

WATER-BASED RECORDING INK

Document Type and Number:

WIPO Patent Application WO/1992/020749

Kind Code:

A1

Abstract:

A water-based recording ink comprising water, pigment, a water-soluble homopolymer, and a copolymer having both hydrophobic and hydrophilic parts. This ink can give printed characters excellent in density, lightfasteness and water resistance. Further it has various characteristics required of an ink for ink jet printing, such as prevention of clogging of minute delivery nozzles, excellence in the scratching resistance and tackfreeness of a print, freeness from the aggregation and sedimentation of solid matters such as pigment particles and from a change in the properties even when stored for long at various temperatures, and the ability of the pigment particles, even if aggregated, to disperse again by agitation or the addition of fresh solvent.

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Inventors:

SHIMIZU JUNKO (JP)
TSUKAHARA MICHIYA (JP)
YANASE NOBUYUKI (JP)

Application Number:

PCT/JP1992/000652

Publication Date:

November 26, 1992

Filing Date:

May 21, 1992

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)

International Classes:

A61K31/00; C07D243/38; A61K31/255; A61K31/35; A61K31/352; A61K31/38; A61K31/381; A61K31/382; A61K31/40; A61K31/403; A61K31/404; A61K31/435; A61K31/4427; A61K31/445; A61K31/451; A61K31/473; A61K31/485; A61P25/00; A61P25/04; A61P25/18; A61P25/28; A61P43/00; C07C309/65; C07C309/72; C07C309/75; C07C309/76; C07D209/14; C07D209/16; C07D211/32; C07D213/50; C07D221/10; C07D221/14; C07D221/18; C07D221/26; C07D221/28; C07D223/16; C07D279/28; C07D307/81; C07D311/74; C07D333/20; C07D333/34; C07D333/58; C07D335/06; C07D401/06; C07D401/14; C07D455/02; C07D471/04; C07D489/02; C09D11/00; C09D11/322; C09D11/324; C09D11/326; C09D11/38; (IPC1-7): C09D11/00

Foreign References:

JPS56157468A	1981-12-04
JPS5863766A	1983-04-15
JPH02255875A	1990-10-16
JPH0379680A	1991-04-04

Other References: