Dual surface porous material
US5110784A · kind A · utility
24Cited by
16References
90Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Feb 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31862
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous materials having a dual surface are disclosed. Also disclosed is a method for their preparation. An example of such a material is silica gel reacted with 1,1,1-trifluoropropyldimethylsilyl-N-methylacetamide and then, with N-trimethylsilyl-N-methylacetamide to give a dual treated material having 1,1,1-trifluoropropyldimethylsilyl groups on the exterior surface and trimethylsilyl groups on the porous interior surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.