Pigment Disperser MD 20
Pigment Disperser MD 20
Pigment Disperser MD 20
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Technical Information<br />
Architectural Coatings<br />
TI/ED 1138 e<br />
July <strong>20</strong>03 (DFC) Page 1 of 4<br />
Supersedes edition dated December 1995<br />
<strong>Pigment</strong> <strong>Disperser</strong><br />
<strong>MD</strong> <strong>20</strong><br />
Dispersing agent for inorganic pigments and fillers in aqueous<br />
media<br />
Chemical nature<br />
Aqueous solution of the sodium salt of a maleic acid-diisobutylene<br />
copolymer<br />
Properties<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> is a yellowish, slightly cloudy, aqueous solution.<br />
It is used to disperse pigments and finely divided fillers.<br />
Product specification Non-volatile matter % 25 1<br />
(ISO 3251, DIN 53216)<br />
pH (DIN 19268) 9 –11<br />
Viscosity at 23 °C (ISO 3219) mPa·s <strong>20</strong> – 300<br />
shear rate 250 s -1<br />
Iodine colour (DIN 6162) 5<br />
Other properties Density at <strong>20</strong> °C g/cm 3 approx. 1.12<br />
(ISO 8962, DIN 53217)<br />
Setting point °C approx. – 5
TI/ED 1138 e July <strong>20</strong>03 Page 2 of 4 <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong><br />
Areas of application<br />
Processing<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> is a dispersing agent for titanium dioxide and<br />
other inorganic pigments and fillers. It differs from most other organic and<br />
inorganic dispersing agents in that it can be employed in water alone and<br />
in mixtures of water and organic solvents, such as mixtures that largely<br />
consist of glycols or glycol ethers. It performs particularly well in emulsion<br />
paints in which the vehicle predominately consists of propylene glycol.<br />
These paints dry to a very high gloss and they are virtually free of haze.<br />
Gloss and satin gloss emulsion paints can be prepared by mixing<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> with propylene glycol and then dispersing the<br />
titanium dioxide in the vehicle, either alone or in combination with other<br />
inorganic pigments or extenders that act as matting agents. We would<br />
recommend adding <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> at a rate of between 0.5%<br />
and 1%, expressed as solids as a proportion of the pigment and fillers.<br />
Customers need to carry out their own trials to determine the optimum<br />
level of addition that is required to ensure good wetting, high gloss and<br />
high stability in storage when developing formulations that contain<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong>. Factors such as the relative surface area of pigments<br />
and interactions between the polymer dispersion and other additives<br />
can have a variety of effects on emulsion paints which are too numerous<br />
for us to take into account in our own trials. This also includes testing<br />
formulations to ensure that their viscosity remains stable when they are<br />
stored at temperatures of ca. 50 °C.<br />
Safety<br />
General<br />
Safety Data Sheet<br />
Labelling<br />
The usual safety precautions when handling chemicals must be observed.<br />
In particular, the place of work must be well ventilated if large quantities<br />
are being processed, the skin should be protected, and safety glasses<br />
should be worn at all times.<br />
A Safety Data Sheet has been compiled for <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> that<br />
contains up-to-date information on all questions relevant to safety.<br />
According to all the data at our disposal, <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> does<br />
not need to be labelled as a dangerous substance or preparation as<br />
defined in the relevant European Union directives (substances directive<br />
1967/548/EC and preparations directive 1999/45/EC) according to their<br />
current status.<br />
Storage<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> must not be allowed to come into contact with<br />
metals or alloys that are susceptible to corrosion. It is important to ensure<br />
that containers are kept tightly sealed, and the headspace of bulk storage<br />
tanks must be kept saturated with water vapour.<br />
<strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong> has a shelf life of one year at a temperature of<br />
10 – 30 °C.
TI/ED 1138 e July <strong>20</strong>03 Page 3 of 4 <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong><br />
Note<br />
The information submitted in this publication is based on our current<br />
knowledge and experience. In view of the many factors that may affect<br />
processing and application, these data do not relieve processors from the<br />
responsibility of carrying out their own tests and experiments; neither do<br />
they imply any legally binding assurance of certain properties or of suitability<br />
for a specific purpose. It is the responsibility of those to whom we<br />
supply our products to ensure that any proprietary rights and existing laws<br />
and legislation are observed.
TI/ED 1138 e July <strong>20</strong>03 Page 4 of 4 <strong>Pigment</strong> <strong>Disperser</strong> <strong>MD</strong> <strong>20</strong><br />
BASF Aktiengesellschaft<br />
Performance Polymers EDK/B<br />
67056 Ludwigshafen, Germany<br />
www.basf.de/en/dispersionen<br />
architectural.coatings@basf-ag.de<br />
Printed in Germany
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