Honeycomb structure comprising an outer cement skin and a cement therefor
US8999483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Dec 16, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a honeycomb catalyst support structure comprising a honeycomb body and an outer layer or skin formed of a cement comprising an amorphous glass powder with a multimodal particle size distribution applied to an exterior surface of the honeycomb body. The multimodal particle size distribution is achieved through the use of a first glass powder having a first median particle size and at least a second glass powder having a second median particle size. In some embodiments, the first and second glass powders are the same amorphous glass consisting of fused silica. The cement may further include a fine-grained, sub-micron sized silica in the form of colloidal silica. The cement exhibits a coefficient of thermal expansion less than 15×10−7/° C., and preferably about 5×10−7/° C. after drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.