Aqueous metallic ink composition
US6171381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jul 7, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an aqueous metallic ink composition having utility in ink for writing instruments, for printing, for coating, and the like. The composition includes a metallic powder pigment, a colorant, water, and a water-soluble organic solvent, and further includes a natural polysaccharide and at least one compound selected from cellulose derivatives, a cyclodextrin, cyclodextrin derivatives, a water-soluble soy polysaccharide, and water-soluble soy polysaccharide derivatives. In case that an anionic polymer is added as a pigment dispersant into the aqueous metallic pigment composition, the pH value is adjusted to 8.0-10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.