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1. (WO1998050306) IMPROVED SILICA PRODUCT FOR USE IN ELASTOMERS

Pub. No.:    WO/1998/050306    International Application No.:    PCT/US1998/009062
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Sat May 02 01:59:59 CEST 1998
IPC: C01B 33/193
C08K 3/36
Applicants: J.M. HUBER CORPORATION
Inventors: FULTZ, William, C.
MARTIN, Michel, J.
BEAVERS, Mark, A.
Title: IMPROVED SILICA PRODUCT FOR USE IN ELASTOMERS
Abstract:
A precipitated amorphous silica product particularly useful as a highly dispersible filler to elastomeric compounds, especially rubber passenger tire tread formulations. The invention has a CTAB specific surface area of about 10 m2/g to less than 140 m2/g; a multi-point BET surface area of about 50-225 m2/g; a 5 % pH value of about 5.0-8.5; a DBP oil absorption of about 160-310 cm3/100g; a linseed oil absorption of about 150-300 cm3/100g; a projected surface area of no greater than about 4000 nm2; and a pore volume ratio of pores ranging from 175 to 275 Å in diameter to all pores less than 400 Å in diameter of about 10 % to less than 50 %.