Organosilicic elastomers reinforced with improved precipitated silica particulates
US4409356A · kind A · utility
3Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1980 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Dec 19, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mechanically/thermally improved, filler reinforced organosilicic elastomers, e.g., organopolysiloxanes, are comprised of a reinforcing amount of precipitated silica particulates having the properties: ______________________________________ (i) BET surface area 190 to 340 m.sup.2 /g (ii) CTAB surface area 180 to 280 m.sup.2 /g (iii) ##STR1## 0.9 to 1.2 (iv) Residual sodium content <500 ppm (v) pH 3.5 to 6.0 (vi) Specific volume V.sub.o >4.2 (vii) Amount of particles of <0.05% a size as will not pass through a 45.mu. mesh sieve ______________________________________
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.