DISPERSANT DMA 40
DISPERSANT DMA 40
DISPERSANT DMA 40 is an APEO free, highly effective liquid dispersant for pigments and extenders in aqueous systems.
DISPERSANT DMA 40 is compatible with all common synthetic emulsions, creates little foam and is effective in a wide pH range.
The use of DISPERSANT DMA 40 is very favourable in case of storage stability of highly filled emulsion paints and mostly avoids thickening.
TYPICAL PROPERTIES of DISPERSANT DMA 40:
Appearance: Viscous, clear liquid
Composition: Sodium salt of polycarboxylic acid
Solid Content: 40 ± 0.5%
Viscosity (LVT 3/12): 2000 cps max.
pH: 5.0 – 6.0
Solubility in Water: Soluble in water
Ionic charge: Anionic
APPLICATION of DISPERSANT DMA 40:
Normally DISPERSANT DMA 40 is added in emulsion paints with 0,1-0,3 % calculated on pigments / extenders.
The really required quantity essentially depends on the type of the pigments / extenders used and should be determined from case to case (determination of the optimum quantity of the dispersing agent.)
DISPERSANT DMA 40 can be added alone or combined with polyphosphates (i.e.Calgon N).For combined addition mixing proportions of 1:2 to 2:1 has proved to be effective.
If more than 1 % of DISPERSANT DMA 40 is added it should be tested whether the water sensibility of the film increases.
In emulsion paint procedure DISPERSANT DMA 40 normally has to be added before addition of pigments / extenders.
If necessary DISPERSANT DMA 40 can also be applied later.
PRODUCT HANDLING – STORAGE – SHELFLIFE of DISPERSANT DMA 40:
It is not expected that DISPERSANT DMA 40 will give rise to any storage or handling difficulties if properly stored in original packings or in clean, covered, suitable containers at normal temperatures ( 5 – 40 °C) for a maximum period of 12 months.
DISPERSANT DMA 40 must be protected from freezing.
If DISPERSANT DMA 40 crystallized, allow to thaw by heating and stir well before use.
Exposures to extremes of heat and cold should be avoided and special signs and instructions indicated on original packings should be carefully observed.
Dispersant DMA 40 is an APEO-free, low-foaming, highly effective liquid dispersant for pigments and extenders in aqueous systems.
DISPERSANT DMA 40 is compatible with all common synthetic emulsions, creates little foam and is effective in a wide pH range.
DISPERSANT DMA 40 is very favorable in case of storage stability of highly filled emulsion paints.
Recommended DISPERSANT DMA 40 dosage level is 0.1-0.3%.
The maximum shelf life of DISPERSANT DMA 40 is 12 months at temperature 5-40°C.
Appearance: Viscous transparent liquid
Dry matter content% + – 1: 40 ± 0.5%
Viscosity (Brookfield LVT 2/60): 200 mPa.s
pH: 5.0 – 6.0
Preservation of properties during storage: Protect from freezing
Low foaming liquid dispersant, APEO free for pigments and fillers in aqueous systems.
DISPERSANT DMA 40 is compatible with all common synthetic emulsions, produces little foam and is effective over a wide pH range.
This is very convenient when storing highly filled emulsion paints.
AREAS OF USING DISPERSANT DMA 40:
-Facade and interior paints
-Water based primers
BENEFITS of DISPERSANT DMA 40:
-low cost
-high level of dispersion
Parameter: Value
Chemical composition: Sodium salt of polycarboxylic acid
Appearance: clear yellowish liquid
Total solids: 39.5 – 40.5%
PH value: 5.0 – 6.0
Viscosity: 2000 mPa.s
The use of dispersants in oil spill response advantages:
-By removing the oil from the surface it helps to stop the wind effect on the oil slick’s movement that may otherwise push the surface slick towards sensitive areas (often the shoreline).
-In contrast to containment and recovery, dispersants can be used in stronger currents and greater sea states.
-DISPERSANT DMA 40 is often the quickest response option.
-DISPERSANT DMA 40 reduces the possibility of contamination of some resources sensitive to the floating oil (surface slick) such as sea birds and mammals.
-DISPERSANT DMA 40 inhibits the formation of “chocolate mousse”.
-DISPERSANT DMA 40 enhances the natural degradation of oil.
-Dispersion does not produce wastes to be disposed.
DISPERSANT DMA 40
FACTORS AFFECTING THE ACTION OF DISPERSANTS
Regardless of the application technique and dosage used, dispersant action will primarily be determined by:
-type of oil to be treated;
-contact dispersant/oil;
-mixing;
-weather conditions.
DISPERSANT DMA 40
Dispersant/oil contact
In order to achieve a good dispersant/oil contact, a dispersant needs to be sprayed onto the floating oil in such a way as to reach the surface of oil and not to penetrate through the oil layer.
These goals are achieved by combining appropriate spraying technique and appropriate droplet size.
Optimal droplet size is considered to be in the range of 350 and 1000 µm, or approximately 700 µm.
Smaller droplets will be carried away by wind and may never reach the oil, while the bigger ones penetrate through the oil layer and enter directly in contact with the water without having sufficient time to bind themselves to the oil.
Application spraying system should be chosen to reach such requirements.
DISPERSANT DMA 40
PHYSICAL CHARACTERISTICS OF DISPERSANTS
Some physical properties of dispersants may have practical consequences on the use of these products (application, fire hazard, conservation).
For this reason some countries include in their approval procedure some requirements concerning the viscosity and/or pour point, flash point, and stability/shelf life.