Novel precipitated silica particulates
US4704425A · kind A · utility
43Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1984 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Nov 20, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Improved precipitated silica particulates, well adapted as a pigment or reinforcing filler for curable organosilic polymers and other elastomers, have 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 .gtoreq. 4.2 (vii) Amount of particles of a < 0.05%. size as will not pass through a 45.mu. mesh sieve ______________________________________
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.