Colloidal silica for
♦ Silica sol belongs to colloid. It is tasteless and nontoxic, the
chemical molecular formula is mSiO2.nH2O.
♦ Since the colloid grains are minute(10~20nm) and have relatively
large specific surface area, the grains themselves are colorless
and transparent, so they do not affect the natural color of the
material to be covered.
♦ With low viscosity, it can soak the places whtere water soaks,
therefore, it presents excellent dispersion and permability when
being mixed with other substances.
♦ When the moisture contained in silica sol are evaporated, the
colloid grains firmly adhere to the material surface and the
combination of silicon and oxygen is then formed between grains. It
is a good adhesive.
|Average dia ,nm||10-20||≥12|
|Validity||One Year||6 months|
♦ Used as the cohesive agent for various fireproof materials. It has
high bounding strengthe and high heat-resisting
♦ Used in coating industry. It makes the paintsfirm. It also
possesses features, such as anti-contamination, dustproof,
anti-aging, fireproof, ect.
♦ Used in precision casting of thin covers to increase the cover
strength, improve the casting smooth finish. Its molding quality is
better than that of water glass. It can be used to replace ethy l
silicate for molding so as to reduce the costs and help improve the
♦ Having large specific surface area, silica sol can be used for
making catalyst and as catalyst carrier.
♦ Used in paper-making industry. It can be used as the
anti-glutinous agent of cellophane, pre-treatment agent of
photopraphic paper, skidproof agent of cement bags,etc.
♦ Used as sizing agent in textile industry. When used with oil of
photographic paper, skidproof agent to processs wool and rabbit
hair, it helps improve the processing of wool and rabbit hair,
reduce the economic returens.
♦ Used as the treatment agent of silicon steel plates, dispering
agent of kinescope and skidproof agent of floor waxes,etc.
♦ Silica content 40% of alkaline silicon sol and can be used for
refractory material and polishing processing
♦ Ammonia stable silica sol is mainly used in ceramic fiber and
catalyst carrier .