Precipitated silicas

Details Precipitated silicas Precipitated silicas

2006-07-04

2006-07-04

Hendrickson, Stuart (Department: 1754)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

active

07071257

ABSTRACT:
Rubber compositions comprising a precipitated silica with the following physico-chemical properties:BET surface area  35 to 350 m2/gBET/CTAB surface area ratio 0.8 to 1.1Pore volume, PV 1.6 to 3.4 ml/gSilanol group density  6 to 20 ml/(5 g)Average aggregate size 250 to 1500 nmCTAB surface area  30 to 350 m2/gDBP value 150 to 300 ml/100 gV2/V1by Hg porosimetry0.19 to 0.46DBP/CTAB 1.2 to 3.5.

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