| 摘要 |
Described herein is microporous precipitated silica having the following physico-chemical parameters: a CTAB surface area of 50 to 300 square meters/gram, a BET/CTAB ratio of >= 1.3, and a relative breadth .gamma. of pore size distribution of <= 3.5. The precipitated silica can also have a Sears number of from 10 to 28 and a Sears number/CTAB ratio of <= 0.16. Also described herein are vulcanizable and vulcanized elastomer compositions, e.g., tires, containing the microporous precipitated silica.
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