Porous cellulose aggregate and molding composition thereof
US8771742B2 · kind B2 · utility
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3References
17Claims
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Key dates
| Filing date | Nov 9, 2010 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | May 17, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249921
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A porous cellulose aggregate characterized by having a secondary aggregate structure resulting from aggregation of primary cellulose particles, having a pore volume within a particle of 0.265 to 2.625 cm3/g, containing I-type crystals and having an average particle size of over 30 to 250 μm, a specific surface area of 0.1 to less than 20 m2/g, a repose angle of 25° to less than 44° and a swelling degree of 5% or more, and characterized by having the property of disintegrating in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.