Manufacturing process for hollow microspheres
US4421562A · kind A · utility
100Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1983 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Mar 23, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
More perfect, less porous hollow microspheres can be prepared by spray-drying dispersions of alkali metal silicate and "polysalt" that contain certain organic liquids. The organics are water-miscible and have boiling points of 100.degree. C. or more. The solvent is added just prior to spray drying and the resulting product has fewer cracks and/or holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.