Amorphous precipitated silica which may be used to form battery separators of very low specific resistance is characterized by (a) a CTAB surface area in the range of from 140 to 185 m2/g; (b) a DBP oil absorption in the range of from 210 to 310 cm3/100 g; (c) a mean ultimate particle size in the range of from 10 to 18 nm; (d) a total intruded volume in the range of from 2.6 to 4 cm3/g; and (e) an intruded volume in the range of from 0.9 to 2 cm3/g for pores having diameters in the range of from 20 to 100 nm.
申请公布号
EP0902758(A1)
申请公布日期
1999.03.24
申请号
EP19970921275
申请日期
1997.04.24
申请人
PPG INDUSTRIES, INC.
发明人
BOYER, JAMES, L.;KRIVAK, THOMAS, G.;WANG, ROBERT, C.;JONES, LAURENCE, E.