Cabot Homepage


CAB-O-SIL® untreated amorphous fumed silicas are high purity silicas manufactured by high temperature hydrolysis of chlorosilanes in a hydrogen/oxygen flame. They have extremely small particle sizes and varying surface areas. The benefits of these silicas include rheology control, reinforcement and free flow.

CAB-O-SIL is used in numerous applications such as silicone rubber, adhesives, sealants, coatings, cosmetics, pharmaceuticals, composites, elastomers, foods, and inks. Three untreated fumed silica grades are available in densed form. The mechanical compression increases the bulk density.

CAB-O-SIL® Untreated Fumed Silicas
PRODUCT GUIDE
Product Name Surface Area
(m2/g)		 Bulk Density
Tamped Density (g/I)
LM-150 160 50
LM-150D 160 125
M-5 200 50
M-5P 200 50
M-5DP 200 125
M-7D 200 125
PTG 200 50
HP-60 200 50
MS-75D 255 115
H-5 300 50
HS-5 325 50
EH-5 380 50
Typical Properties as Related to Silica Surface Area
130 m2/g <----------> 380 m2/g
<--------- easier to wet ----------
<------- easier to disperse ---------
-------increased thixotropy ------>
------increased reinforcement ---->
------increased transparency------>
Typical Properties as Related to Bulk Density

Undensed <———————> Densed
–––––– faster wet-in –––––––––>
<–––––– easier dispersion –––––––
<––––– increased thixotropy ––––