Color-developing agent for pressure-sensitive recording
US4759797A · kind A · utility
19Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Apr 30, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The color-developing agent for pressure-sensitive recording sheet comprises the polyvalent-metal salt of carboxylated terpenephenol resin. The color-developing sheet containing the above color-developing agent provides excellent yellowing-resistance, superior color-developing ability and improved fastness of the colored image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.