Hydrophilic fumed silica

AEROSIL® fumed silica—product groups

Hydrophilic fumed silica
AEROSIL^® grades	BET surface area [m²/g]	Loss on drying [wt.%]	pH
AEROSIL^® 90	90 + 15	<1.0	3.7‑4.7
AEROSIL^® 130	130 + 25	<1.5	3.7‑4.7
AEROSIL^® 150	150 + 15	<1.5	3.7‑4.7
AEROSIL^® 200	200 + 25	<1.5	3.7‑4.7
AEROSIL^® 300	300 + 30	<1.5	3.7‑4.7
AEROSIL^® 380	380 + 30	<2.0	3.7‑4.7
AEROSIL^® OX 50	50 + 15	<1.5	3.8‑4.8
AEROSIL^® EG 50	50 + 15	<1.5	3.8‑4.8
AEROSIL^® TT 600	200 + 50	<2.5	3.6‑4.5
AEROSIL^® 200 SP	200 + 25	<1.5	3.7‑4.7
AEROSIL^® 300 SP	300 + 30	<1.5	3.7‑4.7
AEROPERL^®300/30	300 + 30	<3.5	4.0‑6.0

The data represents typical values.

Along with the traditional polyester, silicone, paints and coatings applications, hydrophilic AEROSIL^® products are used with increasing success in high technology fields. The particle nature and high purity of fumed silica play key roles in the electronics and optical fibers industries. AEROSIL^® EG 50 is of an especial highly pure quality and has been developed for these applications.

Furthermore, the hydrophilic AEROSIL^® grades are characterized by an X-ray amorphous structure. Depending on the market and application, products with various primary particle sizes and different BET-surface areas are available. Certain types are also available in compacted form (V and VV grades) and in a pharmaceutical grade.

Positive effects:

Optimum adjustment of rheology during processing
Reinforcement of silicone elastomers
Thickening of non-polar liquids
Free-flow of foodstuffs and industrial powders
High chemical purity
Excellent insulation properties, even at high temperatures
Conversion of liquids to powders, e.g. pharmaceuticals, cosmetics
Gelification of battery acids
Rheology control of greases and lubricants