Colorant having isocyanate substituent

Details Colorant having isocyanate substituent Colorant having isocyanate substituent

1998-02-19

1999-07-06

Gorr, Rachel

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

106 3127, 106 3143, 106 3144, 106 3157, 523160, 101491, 534558, 534789, 552101, 552208, 552301, 552302, 549388, 546102, 546152, C08G 1802

Patent

active

059198460

ABSTRACT:
A novel colorant compound is provided which is the addition product of an organic chromophore having at least one reactive hydroxyl or amine substituent, a polyisocyanate, and a carboxylic acid, sulfonic acid, or salt of either thereof. The polyisocyanate, added in a molar excess relative to the number of such reactive substituents, reacts with the reactive hydroxyl or amine groups to provide terminal isocyanate groups. Subsequently, the carboxylic acid or salt thereof, also added in an amount excessive in relation to the number of terminal isocyanate groups, reacts therewith to from urethane moieties on the colorant. Such a compound provides excellent ink compositions upon dilution and are very soluble within all the standard ink diluents. Furthermore, such colorants provide good jettability, waterfastness, washfastness, and the like, within ink-jet applications on various types of printing substrates. A method for producing such a colorant and specifically printed substrates colored therewith is also provided.

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patent: 5637638 (1997-06-01), Chandler et al.
Chapter 12, "Ink-Jet Inks", The Printing Inks Manual, 5th Edition, Blueprint, pp. 683-687 (1993).

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