Method of protecting a surface
US5747171A · kind A · utility
2Cited by
12References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/4935
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of protecting a porous material sensitive to corrosion caused by pollutants in the atmosphere. The method comprises treating the surface of the material with an agent containing more than 90% by weight of silica sol. The agent contains substantially no solid particles with a diameter exceeding about 1 micron. Porous building materials comprising a layer of gelled silica sol present in the pores below the material surface are prepared by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.