Ink composition

• US 5,421,868 A
• Filed: 12/28/1993
• Issued: 06/06/1995
• Est. Priority Date: 12/28/1993
• Status: Expired due to Term

• Current Assignee: Funai Electric Co., Ltd., Infoprint Solutions Company LLC (Ricoh Company Limited)
• Original Assignee: International Business Machines Corporation, Lexmark (Ninestar Corporation)
• Inventors: Karis, Thomas E., Cheng, Ying-Ying, Gendler, Paul L., Ayalia-Esquilin, Juan, Diaz, Arthur F.
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US08/174,631
• Time in Patent Office: 525 Days
• Field of Search: 106/22 H, 106/23 H, 106/20 R, 106/22 A, 106/23 A
• US Class Current: 106/31.29
• CPC Class Codes: C09D 11/34 Hot-melt inks

Abstract

The present invention relates to an ink composition for ink jet printers comprising an amorphous bis amide, a colorant and a solvent.

Claims

1. A hot melt ink composition for ink jet printers comprising a solvent, a colorant and an amorphous, asymmetric bis amide binder where each amide is selected from carbonyl amide, thioamide or sulfonyl amide.

2. The ink composition of claim 1 wherein said solvent comprises water, glycol or dimethylsulfoxide.

3. The ink composition of claim 1 wherein said bis amide is selected from

N,N'"'"'-bis(p-nitrobenzoyl)-N-methyl ethylene diamine;

N,N'"'"'-bis(3,5-dinitrobenzoyl)-N-methyl ethylene diamine;

N,N'"'"',-bis(p-nitrobenzoyl)-N-methyl propylene diamine;

or

N,N'"'"'-bis(3,5-dinitrobenzoyl)-N-methyl propylene diamine.