Aqueous ink composition for use in an ink jet printer

Details Aqueous ink composition for use in an ink jet printer Aqueous ink composition for use in an ink jet printer

1997-10-27

1999-02-16

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3143, 106 3158, 106 3168, 106 3175, 106 3186, C07D 1114

Patent

active

058715720

ABSTRACT:
An aqueous ink composition for ink jet printers, which gives reliable printing performance and yields printed images which have excellent print quality and which dry rapidly is disclosed. The ink compositions are suitable for printing on plain paper. The ink comprises water as the principal solvent, an anionic colorant, pectic acid, a base, and at least one of a penetrable solvent and/or a penetrability-imparting surfactant. The pectic acid is composed primarily of .alpha.-1,4 linked polygalacturonic acid having a degree of esterification not more than 5% where the degree of esterification is defined as the percentage of the total number of galacturonic acid units in the pectic acid which are esterified.

REFERENCES:
patent: 5133803 (1992-07-01), Moffatt
patent: 5476540 (1995-12-01), Shields et al.

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