Elastomeric matrix reinforced with precipitated silicas
US6214912A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/19
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A mechanically strong, vulcanized elastomeric matrix having an effective amount of a reinforcing filler material homogeneously dispersed and distributed therethrough, the reinforcing filler material comprising finely divided precipitated silica particulates and the precipitated silica particulates deriving from a powder having a CTAB specific surface ranging from 100 to 140 m.sup.2 /g, a median diameter .phi..sub.50, after ultrasonic disintegration, less than 2.8 .mu.m, exhibiting an ultrasonic disintegration factor F.sub.D greater than 3 ml, having a BET specific surface ranging from 100 to 200 m.sup.2 /g, having a mean particle size greater than 15 .mu.m, a packing density in the tamped state of at least 0.17, and a DOP oil uptake ranging from 150 to 400 ml/100 g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.