Clarcel Fillers in Paints
Diatomite is a mineral composed of the amorphous silica
skeletal remains of microscopic aquatic plants called diatoms.
Diatomite main properties
· lightness
· porosity
· brightness
· absorptivity
· purity
· multi-shaped
· rigidity
CLARCEL products are obtained by flux calcination
and particle size selection of diatomite.
They are composed of more than 85% of silica
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Paints
• Main advantages of CLARCEL for paints:
Matting effect
Porosity
Chemically inert
Whiteness
Hardness
Silica structure
Light density
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Matting effect
To obtained a matt effect small particles (5µm to 50µm) are added to paints.
The irregular and very porous shape of diatomite enhance their efficiency.
Incident light
Diffusion of the incident light by reflection
CLARCEL particle
embedded in paint film
A narrow size distribution is however necessary to insure regular roughness of
the surface and reflection of light.
Dis tributio n G ra nulo mé trique du CLARCEL DIF/D
7,5
7
6,5
6
5,5
5
4,5
4
3,5
3
2,5
2
1,5
1
0,5
0
0,1 1 10 100 1000
D ia mè tre d e s p a rtic ule s (µm)
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Permeability
Paints as coating
Paints are more than just colors we apply to surfaces.
They are coatings serving a variety of purposes.
In addition to coloration, paints protect surfaces,
can change their shapes, and alter their physical properties.
Let's consider paints as coatings
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Permeability
Most paints include at least four groups of components:
Binders, Volatile substances, Pigments, and Additives.
Binders give their structures to paints.
They create coatings that stick
to surfaces and remain in place indefinitely.
Volatile substances are chemicals that keep the paints fluid
enough to be applied easily and that subsequently evaporate during
drying.
Pigments give coating its color, opacity, and other
optical properties
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Permeability
Additives help these three components working
together to form a uniform coating.
Some additives aid in the drying process
Others help keep the binder or pigment particles from clumping
together before the paint is used
Still others alter paint’s viscosity to make it easy to apply.
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Permeability
Common paint problems
Excess humidity or other
Penetration of rain, humidity and other
moisture escaping from inside
forms of moisture
through the exterior walls
The water is unable to Rainwater migrates through
escape through the wall and gets under the
paint and create layer of paint.
blisters when the paint
is heated by sunlight.
A performant solution :
Paints must meet two requirements :
JL/Mkt Paint 10/05 V1
Permeability
First requirement
Act as a barrier to rain
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Permeability
How does the paint works ?
Wall
Breath paint
The film does not allow rainwater to pass into the wall because the
capillaries in the film are much finer than those in the wall.
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Permeability
Second requirement
Allow the release of any moisture contained in the substrate
or coming up from the ground by capillary action.
JL/Mkt Paint 10/05 V1
Permeability
How does the paint works ?
Wall
Breath paint
The micro porous nature of the paint, plus its excellent adhesion,
allows moisture in the wall to pass through the paint without
blistering.
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Permeability
Dry weather Rainy weather
Wall Wall
Breath paint
Breath paint
Solution : Breathability
The micro porous nature of paints means
that they protect the masonry surface
from rain, allow entrapped moisture
vapour to escape.
JL/Mkt Paint 10/05 V1
Permeability
Main advantages of paint “breathing”
• Preventing the penetration of water, but enabling the
removal of moisture
• Minimum surface preparation
• Easy to apply, even on complex surfaces
• All weather application
• Excellent dry film properties that provide adhesion,
durability and breathability.
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How do we get Porosity
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Porosity
From IDPA –International Diatomite Producers Association(Member of IMA-Europe)
The structural porosity of Diatomite CLARCEL®
☺ Helps the dispersion of the components
☺ Helps the drying process by improving the liberation of
solvent or water from the surface
☺ Allows the migration of moisture to avoid bubbles in the film
of paint
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What about the market of Masonry Paint
In Western Europe, Brteathability is a key parameter for Masonry
paints
This is measured according to ISO NF 7783-1
Production of paint represant 500 000 t per year.
Three differents FORMULAS
FORMULAS USE of DIATOMITE
X
Silicate
Acrylic dispersion
YES
Siloxane
YES
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Other properties
Chemically inert
CLARCEL do not react with the solvents and is environmental friendly.
Whiteness
CLARCEL products have an extremely good regularity of the whiteness
(single extraction site).
Hardness
Because of the hard silica structure, CLARCEL improve the resistance of the
surface to scrub.
Silica structure
CLARCEL allow internal light reflection leading to plain colours with less
pigment.
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Other properties
LOW DENSITY compared to Calcium
carbonate (< 600 g/l) or Talc (> 400 g/l)
Lower sedimentation rate => better stability
Better uniformity => particles spread better in the
coating
… and more volume (liters) for the same price in € /kg
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References
AKZO NOBEL
DEUTSCHE AMPHIBOLIN WERKE
BRILLUX
JOBI FARBENFABRIK
LACUFA
ALLIGATOR
ZERO LACK
ALSECCO
DINOVA
NECARBO (SIGMA KALON)
REFERENCES DIF N FD DIF R DIF D
DAW X
BRILLUX X X
AKZO NOBEL X X
JOBI X
STO X
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CONCLUSION
Advantages of CLARCEL as a
PAINT ADDITIVE:
High flatting efficiency
Uniformly controls gloss and sheen
Increases toughness and durability
Controls water absorption
Improves physical & chemical properties of surface
coating
High bulking value
We recommend 5% by weight
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