Color-developing sheet for pressure-sensitive recording sheets
US4833119A · kind A · utility
7Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Dec 29, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/277
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The color-developing sheet for pressure-sensitive recording sheets contains a color-developing agent comprising a polyvalent metal salt of aromatic carboxylic acid in combination with a polyvalent metal salt of carboxylated terpenephenol resin and/or a reaction product of carboxylated terpenephenol resin, aromatic carboxylic acid and polyvalent metal compound. This color-developing sheet provides a higher color-developing rate and a superior color-developing intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.