Precipitated silicas
US5882617A · kind A · utility
18Cited by
49References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/19
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel silicas in the form of powder and spherical beads or granules. The silicas are characterized by having a specific CTAB surface of 100-140 m.sup.2 /g, a small median diameter, following disaggregation by ultrasound means, and optionally, a porous distribution so that the porous volume occupied by the pores whose diameter is 175-275 .ANG. is less than 55% of the porous volume occupied by the pores having diameters of 400 .ANG. or less. The invention also concerns a method for the preparation of said silicas and their use as reinforcing fillers for elastomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.