Ink for use in ink jet printers

Details Ink for use in ink jet printers Ink for use in ink jet printers

C - Chemistry, Metallurgy

09

D

C09D 11/02 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2240974

Described is an ink for use in ink jet printers, comprising (a) a solvent, which consists at least of approximately 80% of a homopolar, non-watery solvent, (b) a pigment dispersed in the solvent and (c) a copolymer of vinyl-pyrrolidone with one or several long-chain .alpha.-olefins with at least 6 carbon atoms, specifically with 6 to 24 carbon atoms. Properties of the ink are as follows: reduced color bleeding, reduced penetration of coloring agent into the surface of the paper, improved optical density and improved storage stability.

L'invention décrit une encre pour imprimantes à jet d'encre, renfermant : a) un solvant, constitué d'au moins 80 % environ d'un solvant homopolaire, non aqueux; b) un pigment dispersé dans le solvant; c) un copolymère de vinylpyrrolidone avec une ou plusieurs alpha-oléfines à longue chaîne, soit au moins 6 atomes de carbone, et plus spécifiquement avec 6 à 24 atomes de carbone. L'encre possède les propriétés suivantes : étalement moindre de la couleur, pénétration réduite de l'agent de coloration à l'intérieur de la surface du papier, densité optique et stabilité au stockage améliorées.

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