Color developer pigment for carbonless copying paper
US6277490A · kind A · utility
12Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Dec 1, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A color developer pigment for carbonless copying papers based on acid-activated smectitic layered silicates, wherein a phenolic resin is condensed on the acid-activated layered silicate. The invention also concerns a coating composition based on the color developer pigment as well as a copying paper containing the color developer pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.