Alcoa C-333
Alumina trihydroxide
Alcoa
漏斗 >> 三水合铝(ATH)
Filler >> Aluminum trihydrate (ATH)
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Alcoa® white hydrated alumina, is
aluminum trihydroxide, Al(OH)3, that
is produced through special processing
of alumina-bearing feedstocks
and stringent process control
systems. The result is an alumina
trihydroxide of exceptional purity
and whiteness. Although hydrated
alumina is a dry powder, it contains
a high proportion, approximately 35
percent by weight, of chemically
combined water. The hydrate is a
nonabrasive, low-density material
with a Mohs’ hardness index of
2.5 - 3.5 and a specific gravity of
2.42 g/cc. White hydrates are used
primarily in applications where color
and the absence of impurities are
critical. They are halogen-free
making them excellent nontoxic
flame retardant/smoke suppressant
fillers for plastic compounds.
Alcoa precipitates a highly pure
gibbsite phase of alpha alumina
trihydrate. The Alcoa proprietary
white stream process is designed,
through chemical and recrystallization
processes, to achieve near 100
percent photovolt brightness and
relatively uniform particles.
Ground White Hydrate
Intermediate and fine size grades
are produced by grinding the
precipitated grades to form C-231
(14 microns) and C-333
(7 microns).
Grades C-231 and C-333 are
ground versions of Grade C-33.
They are used in polymer formulations,
toothpastes, adhesives,
coatings, paper, cosmetics, waxes
and polishes.
White, pure, halogen-free, nonabrasive, low-density hydrated alumina. Used as a flame retardant/smoke suppressant filler for coatings. Recommended for applications where color and the absence of impurities are critical.