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| Produuct Line
» Nopco Range of Products
» NOPCOTE
VD |
| NOPCOTE VD |
Synthetic Thickener for Paper coatings |
| NOPCOTE VD is
an aqueous solution of a modified sodium polyacrylate.
It is an additive for improving water retention,
stability and flow properties of coating colours. |
| TYPICAL PROPERTIES |
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| Appearance |
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clear, colourless to light amber, viscous |
| Solids |
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15 +0.5% or -0.5% |
| Specific Gravity (20degree) |
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1.07-1.09 |
| Ionic Nature |
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Anionic |
| pH(2% solution) |
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10.0-12.0 |
| Solubility in Water |
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Infinitely soluble in water |
| Viscosity, at 25 degree C (Brookfield) |
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50,000-100,000 cps |
| pour point |
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Approximately 10 degree C |
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| NOPCOTE VD is recommended
as a thickener, stabiliser and protective colloid
for coatings which contain natural and synthetic rubber
latices and polyvinyl acetate. Unlike natural :thickeners,
such as casein and CMC, NOPCOTE VD
is inert to hydrolysis and bacterial action.
Compared some other synthetic thickeners, NOPCOTE
VD is easier to handle. It pours readily
and can be added directly to the latex or coating
colour due to its good water solubility properties.
The handling and metering difficulties with solid
thickeners such as CMC we also avoided
NOPCOTE VD is a smooth, gel-free
product with a viscosity which remains constant
over long storage periods. The product also remains
chemically stable during long periods of storage
and is not degraded by temperatures below 1 00 degree
C.
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APPLICATION
NOPCOTE VD is an effective water
retention aid for pigmented coatings. It is especially
recommended for coatings with high proportions of
latex binders. Small quantities of NOPCOTE
VD significantly retards vehicle penetration
of pigmented coatings, preventing coating solids increases
in the coating application process which can result
in undesirable rheological properties.
Improved stability of coating viscosities results
in more desirable flow properties. Scratches, streaks
and other coating defects are thereby reduced, and
the leveling of the coating may be improved.
NOPCOTE VD is compatible with
all natural and synthetic binders. It contributes
to forming a strong and abrasion - resistant film
with the binder.
Suggested application rate of NOPCOTE VD
in an average pigmented coating is 0.05 to 0.50%
of dry NOPCOTE VD, based on coating
solids. In a typical 60% solids coating, the addition
rate of NOPCOTE VD, as received,
would be 0.3 to 3 kg per tonne of coating.
NOPCOTE VD is usually added at
the same ~c as the latex. However, it can be added
at the pigment dispersing stage without any adverse
effect on its performance. |
| FDA STATUS
NOPCO VD contains ingredients
which comply with the following indirect food-contact
sections of 21 CFR: |
| 176.170 |
176.200 |
| 176.180 |
177.1200 |
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| HANDLING
Safety precautions and handling procedures are
described in the Material Safety Data Sheet MS-130.
PACKAGING
NOPCOTE VD is supplied in steel,
open-top drums, with inner liner polythelene bag,
nett weight 200 kg. |
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