Coumarin spherules/beads having unique morphology
US5693342A · kind A · utility
4Cited by
3References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Mar 16, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Free-flowing, non-agglomerating and attrition resistant, substantially spherical solid beads/spherules of a coumarin compound, advantageously having a particle size ranging from 100 .mu.m to 2,000 .mu.m, a loose bulk density ranging from 0.25 to 0.8 and a compressive strength ranging from 500 to 10,000 N/m.sup.2, dissolve rapidly in ethanol and are conveniently prepared by prilling/fragmenting a melt of the coumarin compound into a stream of a cooling gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.