Ballpoint-pen ink compositions
US7297730B2 · kind B2 · utility
2Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2003 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Jun 21, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink composition useful in an oil-based ballpoint pen capable of drawing a satisfactory line on the surfaces of various materials to be written which are not only papers but also non-permeable materials such as glasses and plastics as well as fibrous materials such as fabrics is provided. Such a ink composition comprises a colorant, an organic solvent having a vapor pressure of 5.0 to 50 mmHg (20° C.) as a main solvent, such as n-propyl alcohol, isopropyl alcohol and propylene glycol monomethyl ether and a shear-viscosity reducing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.