Carbonless copy paper coating containing microencapsulated load bearers
US5002924A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/1243
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Microencapsulated load bearers to prevent the premature rupture of dye precursor-containing microcapsules are formed concurrently in the same microencapsulation process in which oil/dye precursor-containing microcapsules are formed by emulsifying an oily mixture, containing therein a dye-precursor solution and non-rupturable core particles, as droplets into an aqueous solution. The core particle and oil/dye precursor droplets are then microencapsulated to form a binary microcapsule mixture consisting of microencapsulated load bearers and oil/dye precursor-containing microcapsules, respectively. This binary microcapsule mixture in an appropriate solvent vehicle may be used as a coating for the preparation of carbonless copy paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.