Precipitated silica and process for its manufacture
US12134564B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Nov 6, 2019 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Nov 7, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A precipitated silica having large particle size for use in tire applications. In particular, a precipitated silica characterised by a CTAB surface area SCTAB equal to or greater than 160 m2/g; a median particle size d50, measured by centrifugal sedimentation, such that |d50|>25000/|SCTAB| (I)wherein |d50| represents the numerical value of the median particle size d50 measured by centrifugal sedimentation and expressed in nm and |SCTAB| represents the numerical value of the CTAB surface area SCTAB expressed in m2/g; andan aluminium content not exceeding 4500 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.