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GENERAL INFORMATION
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ZRCI
SI-HARD Rigidizer Hardener is a alkaline, aqueous dispersion of
colloidal silica at 50% concentration. The dispersed silica is present as amorphous
spheres, 100 nanometers in size. The silica present is non-agglomerated and is completely
dispersed. There is no mixing or dilution required. The particles
carry a slightly negative charge and have a large surface-to-weight ratio.
It
is used for rigidizing and hardening the surfaces of ZIRCAR ceramic
textile, papers and blankets. It also is ideal as a coating agent and
binder.
SI-HARD
is easily applied by brushing, rolling, dipping, sponging or spraying. It
is non flammable and is not affected by freezing. Coverage depends upon
the desired hardness.
SI-HARD
should be stored at temperatures between 5°C (41°F) and 32°C (90°F) to
prevent irreversible precipitation of the silica.
Drying
of treated parts can typically accomplished at temperatures of 150°C for
one hour. |
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SUGGESTED APPLICATIONS
SI-HARD is used as a strengthening agent for
ZRCI Refractory Sheet
Products including:
CHARACTERISTICS & PROPERTIES
| Silica, wt. % |
50 |
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Color
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White
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Particle Size (nm)
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100
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pH
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9
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Specific Gravity
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1.4
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Viscosity, cP
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15
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Stabilizing Ion
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Ammonium
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Na2O, %
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~0.12
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Surface Charge
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Negative
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SUGGESTED
APPLICATIONS
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Coating surfaces of
ZRCI
textile, blankets and papers for improved hardness, abrasion & chemical
attack resistance.
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Forming of shapes (rigid
tubes, boats, setters, supports, process fixtures etc.) by rigidization of
flexible ZRCI materials.
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Bonding agent in manufacture
of ceramic fiber containing refractories, composites and laminates.
AVAILABILITY
| tem
# |
Description |
1 - 9 |
10 - 25 |
26+ |
| LS50 |
SI-HARD, 1 Gallon Bucket |
$49 |
$47 |
$44 |
| LS51 |
SI-HARD, 5 Gallon Bucket |
$166 |
$158 |
$149 |
PRICES ARE SUBJECT TO CHANGE WITHOUT
NOTIFICATION AND ARE SUBJECT TO ZIRCAR REFRACTORY COMPOSITES, INC. TERMS AND
CONDITIONS. ALL PRICES ARE F.O.B. FLORIDA, NY AND ARE IN U.S. DOLLARS.
HOME
ZIRCAR REFRACTORY COMPOSITES, INC.
P.O. BOX 489
FLORIDA, NEW YORK 10921
TEL: 845-651-2200, FAX: 845-651-1515
email: sales@zircarchina.com
This information, which is subject to
change, is offered solely for your consideration and should not be taken as a
warranty or representation for which we assume legal responsibility. It is not
to be understood as permission or recommendation to practice a patented
invention without a license and the user should determine whether relevant
patents exist.
Copyrights and trademarks are the property
of ZIRCAR Refractory Composites, Inc.
for technical problems viewing these pages, please contact sales@zrci.com
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