Process for surface modified hollow microspheres
US4411847A · kind A · utility
26Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1982 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | May 27, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2996
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Non-fused hollow glass microspheres that consist primarily of silicate are rendered more water-resistant by treatment with multivalent metals. The hollow microspheres are slurried with water and then a solution of a multivalent metal salt such as Al.sub.2 (SO.sub.4).sub.3 is added to the slurry. The rate of the addition is controlled so that the pH can be regulated. Separating, washing and drying complete the preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.