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| ISO
9001:2000 |
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| ISO
9001:2000 |
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| ROLE
OF ZINC OXIDE (ACTIVATED / TRANSPARENT) |
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Organic accelerators
used in rubber compounding are almost always dependant on the presence
of activators. Zinc Oxide is the most important of such activators.
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| ZINCOSIL
NK-A AND NK-T |
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| a. |
Because
of their very small particle sizes zinc-oxide
active & transparent (NK-A &
NK-T) cause very powerful activation
of the cure. Depending on the type and
amount of accelerator present they can
considerably delay the onset of cure
without simultaneously extending the
total curing time. |
| b. |
Because
of stronger activating effect, the amount
of this substance needed for the same
modulus is lesser as compared to ordinary
Zinc Oxide. |
| c. |
Unlike
ordinary Zinc-Oxide, ZINCOSIL NK-T is
compatible with the production of transparent
goods as it does not impair the transparency
of the vulcanizates when added in small
and moderately large amounts. |
| d. |
They
cause no changes in the colour of the
vulcanizates. They reduce yellowing
in white and light coloured goods which
are exposed to strong light. |
| e. |
As
they do not have pigmenting properties,
they do not influence effect of colour
pigments provided they are not too heavily
loaded. |
| f. |
Due
to exceptionally low lead compound contents
they are particularly suitable for vulcanizates
intended to be practically free from
heavy metals. |
| g. |
They
do not boom. |
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| APPLICATIONS
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| a. |
Can
be used as activators in : 1.
sulphur cures 2. peroxide cures
(often) 3. sulphurless metallic-oxide
cures. Used as crosslinking agent
for lattices with reactive groups
and for CR. |
| b. |
Suitable
for following types of rubber-NR,
IR, BR, SBR, NBR, IIR, CR, EPDM,
CSM. |
| c. |
Transparent
goods i.e. injection caps, condoms,
gloves, lab. appartus. |
| d. |
Rubber
foam. |
| e. |
Highly
elastic vulcanizates (spring components). |
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| PACKING |
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| (25
kgs) In new laminated H.D.P.E. bags with loose
polythene liner inside. |
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| INCORPORATION
/ USAGE |
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| a. |
Owing
to the fineness of particles,
ZINCOSIL NK-A and NK-T are very
easy to incorporate and disperse
well. |
| b. |
They
raise the viscosity of the mix.
Large additions stiffen the mix
considerabely. |
| c. |
As
their propertion is increased,
the thermal conductivity of rubber
mixes is raised which is an advantage
in hot air curing. |
| d. |
In
large proportions, zinc-oxide
active, NK-A behaves like a reinforcing
filler. It gives vulcanizates
high tensile strength and rebound
resilience with a simultaneous
increase in hardness. It also
imparts resistance to ageing and
protection against flex-cracking. |
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| WHY
USE ZINC OXIDE (ACTIVATED
/ TRANSPARENT) |
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| a. |
Our
strong technical background
in terms of R &
D facilities and scientific
personnel has enabled
us to optimize our
production cost to
provide you the best
possible quality at
a very reasonable
price. |
| b. |
Equipped
with a rubber laboratory,
we have modified our
product to give an
excellent combination
of various desirable
properties in rubber.
|
| c. |
Fineness
of particles or surface
area is the most important
property which determines
activity. We have
optimised the surface
area to give best
results in rubber.
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| ZINCOSIL
RT-70 |
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| TYPICAL
PHYSIOCHEMICAL
PROPERTIES |
| Property |
Unit |
Value |
| Surface
Area (BET) |
m²/gm |
22-26 |
| Bulk
Density* |
gm/cc |
0.35-0.45 |
| Oil
Absorption |
% |
110-130 |
| pH
(2% acq. Solution) |
% |
7.2-8.8 |
| ZnO |
% |
72±4 |
| Pb,
Cu, Ni, Mn,
Cd |
ppm
max.(total)
|
20 |
| Moisture
( at 90°C) |
% |
<2.0 |
| Residue
on 300 mesh |
% |
<0.8 |
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| Download Specifications |
| ZINCOSIL
AH - 90 |
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| TYPICAL
PHYSIOCHEMICAL
PROPERTIES |
| Property |
Unit |
Value |
| ZnO |
% |
90±2 |
| Electrolytes |
% |
<1.0 |
| pH
(2% acq. Solution) |
-- |
7.0-8.5 |
| Bulk
Density* |
gm/cc |
0.8-0.9 |
| Moisture
( at 90°C) |
% |
<1.0 |
| Heavy
Metals |
ppm
(max.total)
|
20 |
| Residue
on 300 mesh |
% |
<0.8 |
| Surface
Area (BET) |
m²/gm |
15-20 |
| Water
Absorption |
% |
34-38 |
| Oil
Absorption |
% |
32-36 |
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| Download Specifications |
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| ZINCOSIL
NK-T - 48 |
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| PRODUCT
CHARACTERISTICS
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| Test |
Unit |
Value |
| Percentage
as ZnO |
% |
70 |
| Total
Soluble
Salts
|
% |
0.5 |
| Sieve
Residue
350 mesh |
% |
0.2 |
| Bulk
Density* |
gm/cc |
0.4-0.6 |
| Surface
Area |
m²/gm |
38-42 |
| Moisture |
%
max |
2.0 |
| Packing |
Kgs
/ bag |
25 |
| Transparency
after
vulcanization
|
Visual
observation
|
Transparent
equal
to imported
grades
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| pH |
-- |
6.5-8.0 |
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| *At
the time of
packing. |
| Download Specifications |
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MLA
Group of Industries
111/230, Harsh Nagar, Kanpur-208012 (INDIA),
Ph.: (H.O.) +91-512-2291408/09/10 (EPABX), (Works) +91-512-2691154/55/56
Fax:
+91-512-2290057, 2691153
E-mail: sales@mlagroup.com,
mktg@mlagroup.com |
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