Anti-coalescent ink composition and method for making the same
US5188664A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Nov 26, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved ink composition having an additive therein for reducing the surface tension of the composition and increasing the drip mass per firing. Reduced surface tension and increased drop mass per firing enable the production of graphic images having enhanced clarity and contrast while avoiding problems such as bubble adhesion/longevity and ink mottling/coalescence. The additive basically consists of at least one polyether polyol. The additive is usable in a wide variety of ink compositions. In a preferred embodiment, ink compositions using the additive will include about 0.001-1.0% by weight additive (0.0075%=optimum). The resulting ink formulations are capable of printing high resolution graphic images while avoiding the problems described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.