Organotin fluorides having controlled morphology
US4987245A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2217/285
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Organotin fluorides, notably dialkyltin difluorides, well adpated for the manufacture of coated insulating glassware and having controlled morphology, are prepared by reacting a stannic compound, e.g., an organotin chloride, with a fluorinating agent, e.g., hydrofluoric acid or an ammonium fluoride, admixing the organotin fluoride thus produced in a solvent that is immiscible with the fluorinating agent but which solubilizes the organotin fluoride therein, subsequently or simutaneously heating the solvent medium to a temperature sufficient to release unreacted fluorinating agent therefrom, and cooling such solvent medium and thereby crystallizing therefrom an organotin fluoride having a controlled morphology, e.g., well defined platelets having a characteristic DTA spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.