Microcapsules having polyurethane walls
US4874832A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved microcapsules have a capsule wall which contains a polyurethane which can be obtained by reacting an isocyanate with a polyether polyol which contains amino groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.