High cohesive strength composite materials and, E.G., cigarette filters shaped therefrom
US9808785B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2007 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Nov 28, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/28083
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Composite materials having high cohesive strength, formed from at least one polymer and from at least one compound selected from among mineral oxides, aluminosilicates and active carbon, are characterized by a mean particle size of at least 100 mm, a pore volume (Vd1) formed by pores having a diameter ranging from 3.6 to 1,000 nm, equal to at least 0.2 cm3/g, a cohesive strength such that its content of particles having a size of less than 100 mm, obtained after being subjected to an air pressure of 2 bar, of less than 1.5%, preferably 0.0%, by volume; such composite materials are formed into useful liquid supports, catalyst supports, additives, or liquid or gas filters, in particular into cigarette filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.