Cabot speciality carbon blacks
The use of carbon as a pigment was one of the earliest human discoveries. Modern
carbon blacks are the descendants of the soot used by our remote ancestors to
draw the animals they hunted on the walls of their caves. The fact that these
paintings have survived for the thousands of years since demonstrates the
stability of carbon as a pigment.
Needless to say, today's carbon blacks offer levels of performance which could
only be dreamt of in earlier times. James M. Brown is the agent in the UK for
the special grades of carbon black manufactured by Cabot.
The vast majority of carbon blacks produced today are manufactured by the
furnace process. This type of plant can produce material with particle
diameters ranging from 10 - 90 nm and particle surface areas from 20 - 200 m²/g.
AREA OF APPLICATION
> PLASTICS
> PRINTING INKS
> COATINGS
|
PLASTICS
Cabot produces many special grades specifically for use in plastics, each
offering differing combinations of properties:
> "jetness" (degree of blackness)
> tinting strength
> processability - optimum dispersion and compound
melt viscosity
> UV protection
> electrical conductivity
> mechanical properties
> weathering
Particular grades of carbon black can be suggested for the following types of
application:
> pipes for potable and non-potable water and gas
> fibres - textile continuous fibres
> fibres - staple fibres
> films for use in packaging, agriculture and for general
purpose use
> plastic sheeting
> injection and blow moulding
> cables
Cabot can supply grades which meet European Union or US FDA requirements for use
in food-contact plastics. Please click here for further information.
PRINTING INKS
The following properties affecting ink performance are highly dependent on the
carbon black "structure":
> wetting time
> dispersion properties
> viscosity
> flow properties
> colour tone
> optical density
> rub resistance
The "structure" of the pigment can be estimated by its oil absorption. Carbon
blacks for printing inks have oil absorptions in the range 46 - 124 cm³/100g, particle sizes from 60 - 20 nm and BET surface areas from 30 - 138 m²/g.
Cabot can offer grades which offer the optimum balance of properties for a wide
range of printing ink applications.
|
COATINGS
Cabot has a range of carbon black grades available which are suitable for use in
the following range of applications, in both aqueous- and solvent-based
systems:
> automotive primers and topcoats (OEM or repair markets)
> marine coatings
> aerospace coatings
> can coatings
> decorative coatings
> wood coatings
> industrial coatings
> powder coatings
Selection of the correct grade for the particular application will produce an
optimal balance of the following characteristics:-
> colour performance
> gloss
> stability
> dispersability
> weatherability
Please feel free to contact us for further information regarding the use of
Cabot carbon blacks in plastic, printing ink or coating applications.
|
Page last updated 25/7/11
