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Great Solutions with Small Particles
Sachtleben Technology for Industrial Paints
and Coatings
04
.12
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1
Sachtleben products for industrial paints and coatings
TiO2
technology
ZnS and BaSO4
technology
Ultrafine TiO2
UV protection for wood lacquers: HOMBITEC grades
Metallic effect paints: UV-TITAN
Hiding TiO2
Rutile TiO2: SACHTLEBEN grades
Anatase TiO2: HOMBITAN grades
ZnS SACHTOLITH
ZnS / BaSO4 LITHOPONE
BaSO4
BLANC FIXE
SACHTOPERSE
Great Solutions with Small Particles
The markets for industrial paints and coatings can be
subdivided into a large range of end applications: gene-
ral industrial, car OEM, vehicle refinishes, wood coatings,
coil coatings, marine coatings, etc. The industrial paints
market is not as large, measured by volume, as the ar-
chitectural and decorative paints sector, but accounts for
around 50% of global paint business by value. In addition,
there is a wide range of resin systems in use: solvent-based,
high-solids, powder coatings, UV-curing and waterborne.
End requirements focus on the quality and the processing
properties of the raw materials, and on their performance
in the ultimate application. This generates challenges to
raw-materials suppliers to continuously develop new, im-
proved, higher-performance solutions.
Sachtleben is a leading producer of high-quality chemical
products and supplies a unique range of white pigments,
functional additives, extenders and fillers for paint systems
and plastics. The company has a tradition extending back
over more than 125 years. Sachtleben produces particles
on the chemical basis of titanium dioxide, zinc sulfide and
barium sulfate, and markets these products around the
globe.
A particular focus in this context is on problem-solving ca-
pabilities and technical service furnished directly on site at
the customer‘s. A world-spanning network of branches,
agents and distributors makes Sachtleben a global pla-
yer. Sachtleben is certificated to Deutsche Gesellschaft für
Qualitätssicherung standards (ISO 9001 and 14001).
2
Typical properties of Sachtleben TiO2 grades (guideline figures only)
Characteristics RD3 R660 RDI-S R210 RODI R320
Crystal structure R R R R R R
R = rutile, A = anatase
TiO2 [%] 94 94 95 94 95 >98.5
Surface treatment AI, Zr, org. AI, Si, org. AI, org. AI, org. AI, org. org.
Tint reducing power L* 64.6 64.2 64.6 64.0 64.9 63.0
Undertone b* -7.5 -7.2 -7.6 -6.8 -6.6 -5.9
Oil absorption [g/100g] 22 21 21 21 20 18
pH 7.4 8.1 6.8 7.4 7.0 9.2
Crystal size [µm] 0.22 0.22 0.22 0.22 0.24 0.22
Particle size, d(0.5) [µm] 0.35 0.38 0.33 0.44 0.35 0.55
Laserdiffraction
Malvern Mastersizer 2000
White Pigments - Titanium Dioxide
Sachtleben supplies a broad selection of titanium dioxide
pigments for industrial paints and coatings.
SACHTLEBEN RDI-S is a premium rutile pigment which is surface-treated with
alumina and possesses a particularly narrow particle-size
distribution. It is the ideal choice for industrial paints in
which the highest possible gloss level is required.
SACHTLEBEN RDI-S has a bluish undertone.
SACHTLEBEN R210 also an alumina-treated rutile, complements RDI-S in co-
loured paint systems, providing a warm undertone.
SACHTLEBEN RODIis an alumina surface treated rutile pigment based on lar-
ge crystal size with fine final particle size distribution. Thus
it provides a warm undertone, high gloss and very good
hiding power in demanding applications.
SACHTLEBEN RD3 is a multipurpose pigment, surface treated with alumina-
zirconia. Its exterior durability, colour stability and gloss
are outstanding. It is particulary suitable for various
high-performance coating systems.
SACHTLEBEN R660is an exterior durable multipurpose pigment with alumina-
silica surface treatment. SACHTLEBEN R660 has a neutral
undertone.
SACHTLEBEN R320 is an inorganically untreated rutile with a low moisture ab-
sorption. It is particularly recommended for moisture- and
heat-sensitive systems.
Whereas the crystal size is determined by image
related electron microscopy which on its part
reveals the size of the pigment crystal according
to the number distribution, the particle size is
determined by indirect optical means like laser
diffraction which reveals the particle diameter of
the optical relevant size according to the volu-
me distribution representing also the inorganic
surface coating.
3
Fineness of grind of the mill base for solvent-based can coatings dispersed using a high-speed dissolver at 3500 rpm for 8 minutes
particle size
Particle size of TiO2 pigments used in a can coating study
volu
me
inte
nsi
ty
Sachtleben average
Competitor average
Gri
nd
om
eter
rea
din
g [
µm
]
0
Fineness of grind [µm]
Particle end point [µm]
5
10
15
20
25
30
35
40
50
SACHTL
EBEN
RDI-S
SACHTL
EBEN
RODI
SACHTL
EBEN
RD3
Comp. 1
Comp. 2
Comp. 3
High performance thanks to optimized crystal and particle size
Ease of dispersion The surface treatment and particle-size distribution of TiO
2
pigments have an influence on ease of dispersion and dis-
persion stability.
Sachtleben TiO2 pigments are designed to achieve extre-
mely easy wetting and rapid dispersion in both solvent-ba-
sed and waterborne systems. This performance advantage
is illustrated below in a solvent-based can-coating system.
Thanks to the Sachtleben grades‘ rapid wetting and fine
particle-size distribution, good fineness of grind can be
achieved after even only short dispersion times. The su-
perior dispersibility of our pigments assures low energy
consumption, high productivity, reduced dispersion times
and improved product quality.
Particle-size distribution has a significant influence on
the performance of TiO2 pigments in paint and coating
systems. Sachtleben possesses many years of experience in
careful control of particle size in its production processes.
All Sachtleben TiO2 grades possess optimized particle-size
distribution and surface treatments carefully tailored to
the pigments‘ ultimate uses. The narrow particle-size dis-
tribution of our multipurpose TiO2 grades shown in the
figure below assures reliable and consistently good perfor-
mance in your application - superior hiding power and tint
reduction, high gloss, excellent durability.
4
Un
der
ton
e fr
om
blu
ish
to
w
arm
yel
low
ish
Tint reducing power L* increases
RDI-S
RD3
R320
RODI
R660
R210
Tint reducing power and undertone of Sachtleben rutile grades (grey paste)
Hid
ing
po
wer
incr
ease
s
Particle size increases
RDI-S
RD3
RODI
R210
R660
Hiding power L* on black, calculated as the average from stoving enamel, alkyd and high-gloss latex paints
= competitive multipurpose grades
Hiding power is the result, essentially, of the interaction between the
refractive index, crystal size and final particle size of the
pigment.
Rutile and anatase TiO2 both have a high refractive in-
dex, of 2.7 and 2.55, respectively. Optimum hiding power
is attained when the particles are homogeneously
dispersed. The excellent dispersibility and narrow par-
ticle-size distribution of Sachtleben TiO2 grades play a
significant role in achieving best possible hiding power.
SACHTLEBEN RD3, RDI-S and RODI are especially suitable
for high gloss industrial applications. Thanks to its large
crystal size, SACHTLEBEN RODI provides additional hiding
power, particularly in thin coating films.
SACHTLEBEN R660 and R210 are all-round grades.
Tint reducing power and undertone The tint-reducing power of white TiO
2 pigments can also
be described as the ability to lighten the original colour of
a paint. TiO2 has a higher tint-reducing power compared to
other white pigments, as a result of its high refractive index.
Its narrow particle-size distribution assures good hiding
power, in addition to excellent tint-reducing power and
positive effects on undertone. In general, the smaller the
particle size the stronger the tint-reducing power and the
bluer the undertone, as is shown in the graph on the right.
SACHTLEBEN RODI is an exception to this rule. It has an
extraordinarily high tint-reducing power thanks to its
simultaneous unique large crystal size (ca. 0.24 µm, TEM)
and extremely small particle size (ca. 0.35 µm, Malvern
MS2000). Sachtleben supplies pigment products for the
entire undertone range, extending from bluish (RDI-S,
RD3) to warm yellowish (R210, RODI).
5
20° gloss of TiO2 pigments in a high gloss emulsion paint
40
45
50
55
60
65
70
RDI-S
20˚ G
loss
RODIRD3
R210
R660
Comp 2
Comp 3
Comp 1
Comp 4
Gloss rentention of white stoving enamels under overbaking conditions (180˚ C, 45 min.)
40
45
50
55
60
65
70
75
80
85
R210
R660
RD3RDI-S
RODI
Comp 2
Comp 3
Comp 1
Comp 4
60˚ G
loss
Gloss Gloss is a function of the surface roughness of a coating
film. In general, the larger the particle size of a TiO2 pig-
ment, the lower the gloss of the coating. Sachtleben has
always attached special importance to controlling and
adjusting particle-size distribution, and to reducing over-
sized-particle content. Sachtleben thus supplies optimized
solutions for the most demanding high-gloss applications
in the form of its SACHTLEBEN RDI-S, RD3 and RODI
grades. SACHTLEBEN R660 and R210 also offer a good
gloss performance in general industrial paints.
Many industrial coating processes, and also curing at eleva-
ted temperatures, make additional demands on the gloss
retention properties of TiO2 pigments. Optimized surface
treatment of Sachtleben titanium dioxide pigments en-
sures excellent gloss under these challenging conditions.
High performance thanks to optimized crystal and particle size
6
Exposure time, Months0 2 4 6 8 10 12 14 16 18 20 2422
AI2O3-ZrO2 treated RD3
AI2O3-SiO2 treated R660
competitor 1
competitor 2
competitor 3
Acrylic-isocyanate car-refinishing paints exposed in Florida
0
10
20
30
40
50
60
70
80
90
Exposure time, Months0 8 16 24 32 40 48 56 64 72 80
RD3
RDI-S
competitor 1
competitor 2
competitor 3
0
10
20
30
40
50
60
Exterior durability expressed as gloss rentention in a PVDF coil coating exposed in Florida
Weathering resistance
Titanium dioxide itself possesses photocatalytic proper-
ties. The TiO2 surface must therefore be covered with
a suitable layer, consisting, for example, of alumina,
silica and/or zirconium oxide, to prevent direct contact
between the surface of the TiO2 and the binder, and to
inhibit photocatalytic degradation. In addition to surface
treatment, various properties of the TiO2 crystals, such as
rutile content, impurities and stabilization, also have an
influence on durability. Sachtleben grades are designed
to meet all durability requirements. SACHTLEBEN RD3 is
an exceptionally durable grade for use in all demanding
applications, as illustrated by the coil-coatings graph
below, whereas SACHTLEBEN R660, RDI-S and R210
are competitive choices for various general industrial
exterior applications.
7
White Pigments – Zinc Sulfide
Zinc sulfide pigments are the most widely used white pig-
ments, alongside titanium dioxide. They are less optically
efficient than titanium dioxide, but possess a significant
market share nonetheless, as a result of their specific tech-
nical properties.
These pigments, thanks to their soft texture and low
Mohs hardness, are less abrasive than other white pig-
ments. High lightness and low colour hue, low absorp-
tion in the near UV-range and good light fastness, low
binder demand and good rheological properties, wetting
and dispersibility are the outstanding characteristics of the
zinc sulfide pigments. Their weathering resistance is lower
than that of treated rutile pigments, but zinc sulfide pig-
ments can nonetheless be used alone in indoor applica-
tions. Combination with rutile is recommended for use in
outdoor applications.
Technical data of LITHOpONE 30% L and DS
30% L 30% DS
ZnS [%] approx. 30 approx. 30
BaSO4 [%] approx. 70 approx. 70
Colorimetric index L* (powder) approx. 98 approx. 98
Sieve residue 1) m.p. > 45 µm [%] < 0.02 < 0.004
pH approx. 7 approx. 8
Rel. lightening power 2) (blue paste) approx. 120 approx. 125
Hardness [Mohs] 3 3
Density [g/ml] approx. 4.3 approx. 4.3
1) Mesh gauge 45 µm 2) Reference pigment LITHOPHONE = 100 (blue paste)
LITHOpONE LITHOPONE 30% is a white pigment based on a copre-
cipitated zinc sulfide / barium sulfate. Zinc sulfide con-
tent is 30% by weight, whereas on a molecular basis,
LITHOPONE consists of the two components at a ratio of
1:1. Sachtleben supplies LITHOPONE 30% L, an untreated
white pigment for standard waterborne industrial paints,
and LITHOPONE 30% DS, an organically coated white
pigment with an extremely low sieve residue and bet-
ter dispersibility for solvent-based paints and high-gloss
applications.
Paint manufacturers are constantly seeking ways of red-
ucing their production costs. Correct choice of raw ma-
terials makes a decisive contribution to significant cost
reductions. The price of titanium dioxide and binders and
additives on the world market is one of the major cost
factors in production of powder coating systems. The use
of LITHOPONE, the alternative white pigment, can provide
the key to achieving cost reductions without loss of qua-
lity. Both titanium dioxide and binder/additive contents
can be optimized by means of partial replacement with
LITHOPONE 30% without any sacrifice of the powder
coating system‘s technical properties. LITHOPONE‘s low
binder demand compared to a treated rutile TiO2 permits
formulations with a higher PVC and therefore lower bin-
der/additives costs per square meter of painted area.
Furthermore LITHOPONE 30% offers the possibility to op-
timize corrosion resistance and improve sandability due
to its unique particle size distribution and intrinsic parti-
cle package building up a barrier effect in a coating film.
Additional information can be found in the „LITHOPONE
in Coatings“ leaflet.
8
0
10
20
30
40
50
60
70
80
90
100
300 350 400 450 500 550 600
Wavelength [nm]
Ref
lect
ance
[%]
SACHTOLITH L
BLANC FIXE micro
TiO2 Anatas
TiO2 Rutile
UV absorption edge of SACHTOLITH compared with BaSO4 (BLANC FIXE micro), TiO2 Rutile and TiO2 Anatase
SACHTOLITH
SACHTOLITH is a pure zinc sulfide pigment. Its low UV ab-
sorption edge, in particular, can be exploited in UV-curing
coating systems, saving heating energy, and/or opening
potentials for coating of heat-sensitive substrates.
Technical data for SACHTOLITH
SACHTOLITH L SACHTOLITH HDS
ZnS [%] > 98 > 96
Colorimetric index L* (powder) > 97.5 > 97
Sieve residue 1) [%] < 0.02 < 0.004
pH approx. 6 approx. 7
Rel. scattering power 2) > 50 > 52
Hardness [Mohs] 3 3
1) Mesh gauge 45 µm 2) Reference pigment ZnS = 100 PVC = 17 %
UV-curable coatings pigmented with Sachtolith
require less energy for complete curing
curing of high film thicknesses is possible without
affecting surface properties
a slightly increased Sachtolith PVc compared
to tio2 PVc achieves the same hiding power with
no adverse effects
Savings increase as Sachtolith replaces a certain
percentage of the binder without any increased
binder demand
the photoinitiator can also be reduced for
further savings
Sachtleben supplies SACHTOLITH L, an untreated white
pigment for standard waterborne industrial paints, and
SACHTOLITH HDS, an organically coated white pigment
with an extremely low sieve residue and improved dispersi-
bility for solvent-based paints and high-gloss applications.
Additional information can be found in the „SACHTOLITH –
a white pigment for a wide range of coating applications“
leaflet.
9
200 400 600 8000
particle size [%]
100 300 500 700 900
TiO2 pigment grade
HOMBITEC
scat
teri
ng
po
wer
[%
]
0
20
40
60
80
100
Thanks to its small particle size, ultrafine HOMBITEC titanium dioxide does not scatter visible light, and is therefore transparent in clear coating systems
Inorganic Additives
Ultrafine TiO2 for UV-protectionThe crystal size of pigmentary titanium dioxide is around
200-300 nm, that of ultrafine titanium dioxide around
10-15 nm. Pigmentary titanium dioxide scatters visible light
most efficiently and imparts good hiding power, whereas
ultrafine titanium dioxide effectively absorbs UV light and
transmits visible wavelengths through the crystal. Ultrafi-
ne TiO2 thus no longer exhibits pigmentary properties but
is, instead, transparent, and can therefore be used as an
efficient inorganic UV absorber in pigmented systems and
in clear coatings.
Protects UV-sensitive substrates (improved intercoat
adhesion) and/or the polymer itself
Long-term protection thanks to excellent stability
against migration
Improved adhesion under outdoor exposure
Increased gloss retention
For use in pigmented systems with 1 to 3 % PVC
for coating and pigment protection
10
Long term UV protection
Long-term UV protection using HOMBITEC RM300. An alkyd / melamine system after outdoor exposure for three years
Basis Organic UV / Hals HOMBITEC RM300 PVC 1.0
The HOMBITEC product range for UV protection
Characteristics RM 110 RM 300 RM 400
Crystal structure rutile rutile rutile
Crystal size [nm] approx. 10 approx. 15 approx. 10
Appearance (powder) white brownish yellowish
Specific surface area [m2/g] approx. 100 approx. 70 approx. 110
transparency very good good very good
UV-absorption good very good very good
TiO2 [%] content approx. 79 approx. 87 approx. 78
Application general general wood
Inorganic HOMBITEC incorporated into a coating does not
migrate. The UV-absorption characteristics of HOMBITEC
thus remain constant throughout the coating lifetime -
unlike the situation with common organic UV absorbers,
which lose their performance as time progresses due to
weathering, migration and destruction.
Additional information and detailed guidelines on formulation modification can be found in the „HOMBITEC – the inorganic
UV-absorber for long-term protection“ leaflet.
11
Flip-Flop effect
Metal substrate
Flip FlopIncident light
Basecoat Aluminum flakes & Ultrafine TiO2
Clearcoat
Ultrafine TiO2 for metallic effect paints UV-TITAN meets the demands of innovative coatings
manufacturers, providing a range of carefully micronized
transparent titanium dioxide which scatter light when
used in combination with metallic pigments, creating
differing golden flashes with bluish shifts in hue, a
phenomenon known as the Flip-Flop effect.
In order to determine the blue light scattering property
of effect pigments a UV/Vis transmission spectrum of the
water dispersion is recorded. The absorbance in the UV
Aλmax(~330 nm) and Vis A(450 nm) are taken to calculate
the fineness U/V100
. The higher the fineness U/V100
the
higher the transparency of the effect pigment.
UV-TITAN L530 has excellent exterior durability and provide
a unique variety of hue-shifting colors. The following table
below shows typical properties of the UV-TITAN L530.
Typical properties
UV-TITAN L530
Metallic effect silvery blue /
auburn golden
Crystal size [nm] approx. 30
Specific surface area [m2/g] approx. 60
Crystal structure rutile
TiO2 content [%] min. 87
Inorganic treatment alumina
silica
zirconium
Organic treatment polyalcohol
Property of surface hydrophilic
Fineness (U/V100
) 250
Inorganic Additives
Co
lou
r to
ne,
b*
Colour change as b* of automotive metallic effect paint when viewed at different angles
Without UV-TITAN L530With UV-TITAN L530
-15
-10
-5
0
5
10
15
20˚
25˚
35˚
45˚
55˚
65˚
75˚
115˚
Angle
12
Possible BLANC FIXE product modifications
particle size
particle shape
purity
inorganic coating
organic coating
BLANC FIXESachtleben‘s synthetic barium sulfates have been familiar
on the coatings market for more than one hundred years.
Originally used as extenders for simple, low-cost systems,
in the course of time they have continuously gained in
importance as inorganic additives for special high-quality
coatings. Special production methods, various treatments
and the design of special crystallites now permit custo-
mized solutions for the most diverse range of require-
ments. Synthetic barium sulfate is totally inert under nor-
mal conditions, and possesses high resistance to outdoor
exposure.
Properties of BLANC FIXE powder Controlled surface properties, combined with
defined particle size and particle geometry
High consistency of, for example, lightness, thanks
to chemical production process
Low specific surface area, low oil absorption
Colour neutral, thanks to low refractive index
Insoluble in water and organic solvents
An inert product, lightfast and weather-resistant
Acid- and alkali-resistant
Largely free of impurities, such as quartz, for
example, thanks to the chemical production
process used
Low abrasion thanks to low Mohs hardness
Benefits of BLANC FIXE in coatings applicationsThe outstanding technical performance of
BLANC FIXE makes it suitable for use in a large range of
industrial coatings applications:
From fillers to additives
Adjustment of gloss possible
Weather resistance / chemical resistance
Pigment stabilization
Mechanical properties
Benefits for rheological properties
Dispersibility from easy to ambitious
Easily repeatable processing
Easy overpaintability
Customers have at their disposal a broad range of
Sachtleben BLANC FIXE products for achievement
of maximum technical benefits and for minimization
of the price: benefit ratio.
Functional Fillers and Inorganic Additives
13
The BLANC FIXE product range for industrial coatings: from fillers to additives
BLANC FI
XE F /
Super
F
SACHTO
PERSE
HP
SACHTO
PERSE
HU
3 1 0.7 0.2 0.04 µm
BLANC FI
XE N
BLANC FI
XE micr
o / PL
US
The effects of 10% PVC BaSO4 of various particle sizes on the gloss of a clear coat
80
0 0.5
82
84
86
88
90
92
20˚ G
loss
Particle size [µm]
clear coat
1 1.5 2 2.5 3 3.5 4
White solvent-based alkyd systems
00 3 6 9
10
20
30
40
50
60
70
80
90
100
20˚ G
loss
weathering time [months]
Partial replacement of TiO2 (same opacity)
BLANC FIXE on top (higher opacity)
Basic white Formulation
12 15 18 21 24
20˚ and 60˚ gloss of a black stoving enamel FVC 11.5%
0
10
20
30
40
50
60
70
80
90
100
20˚ G
loss
20˚ Gloss 60˚ Gloss
N
F
micro
Reference
Functional Fillers and Inorganic Additives
Adjustment of glossDifferent coatings have different requirements, with re-
spect to gloss, for example. It is possible to adjust gloss,
as a function of the mean BLANC FIXE particle size. As
a general rule (assuming the material is correctly disper-
sed), gloss increases as mean particle size becomes finer.
In most systems, the addition of BLANC FIXE micro with
a particle size of approx. 0.7 µm has no effect on gloss,
whereas BLANC FIXE N or F will decrease gloss, and vari-
ous SACHTOPERSE grades of sizes down to 0.04 µm will
actually improve gloss.
Weathering resistance / chemical resistanceBLANC FIXE in powder form is a totally inert substance
with maximum resistance to weathering. One of the main
applications of BLANC FIXE micro is for partial replacement
of coloured pigments (from TiO2 and coloured inorganic
pigments up to organic pigments). The replacement of a
pigment with BLANC FIXE micro signifies replacement of
a material with a high surface area by a material with a lo-
wer surface area, thus resulting in a surplus of free binder
in the formulation, and therefore increasing weathering
resistance. Only when adding to much BLANC FIXE on top
of the formulation without replacing a negative effect due
to reduced free binder can occur.
14
Spacer
Inert barium sulfate particles act as spacers between pigment particles
BLANC FIXE microd50 = 0.7 µmEconomic way of spacing
d50 = 0.04 µmFor brillant colours,deep black, highest gloss
SACHTOPERSE HU-N
Spacer
Original formulation
pigment stabilization / replacementBLANC FIXE synthetic barium sulfates and, in particular,
BLANC FIXE micro, are used as functional extenders in
coatings. They make it possible to reduce coating-formu-
lation costs and also enhance the efficiency of the pig-
ments used. Barium sulfate particles act as an optimum
spacer for pigment particles. BLANC FIXE micro is, for
example, widely used for partial replacement of both
white and coloured pigments (approx. 10% wt. in each
case) without any loss of optical performance properties,
such as gloss, hiding power and colour strength. This mo-
dification alone can achieve significant cost-savings on
raw materials in terms of white and coloured pigments.
BLANC FIXE micro is the economical method of achie-
ving spacing; higher brilliance is required in some cases,
however. The use of SACHTOPERSE HU is advantageous
for dark colours such as blue and black, in particular, since
this material has a particle size of approx. 0.04 µm and is
thus highly transparent.
The pigment-stabilizing action of BLANC FIXE permits re-
placement of 5 to 15% of titanium dioxide and coloured
pigments content. An example of a modified formulati-
on is shown below. Further information on the proper-
ties and uses of BLANC FIXE micro can be found in the
„BLANC FIXE micro for high-quality coatings“ leaflet and
„Functional Additives for color pastes“ leaflet.
BLANC FIXE micro in a coil coating topcoat formulation
original 10 wt. % replacement formulation of TiO2 and of green pigment
Gloss 20º 69.9 68.7
Gloss 60º 90.5 90.5
Haze 163 177
L* 58.8 58.9
a* -46.9 -46.7
b* 3.4 3.4
10% replacement of TiO2 and of green
pigment by BLANC FIXE micro
15
Functional Fillers and Inorganic Additives
A special form of pigment stabilization can be seen in me-
tallic coatings. BLANC FIXE micro and SACHTOPERSE HU
can be used for orientation of flake-shaped effect pig-
ments, such as aluminium flakes. The orientation of the
flakes parallel to the coated surface is thus improved,
achieving a more intensive colour flop, and less cloudi-
ness in the coating. Unlike the organic waxes also used
for orientation, chemically inert BLANC FIXE has no effect
on adhesion of the clearcoat subsequently applied. In ad-
dition, selection of the correct BLANC FIXE grade permits
achievement of a controlled lightness across the whole
surface.
pigment pastesPigments are the highest-cost component in pigment-
paste formulations. Every pigmentation system should, for
this very reason, be designed to be as effective and effici-
ent as possible. BLANC FIXE micro - a material with a d50
particle size of ~0.7µm - is the all-round talent for every
highly extended paste. Use of BLANC FIXE micro in grin-
ding pigment pastes achieves the same tinting strength
after a shorter grinding time, or even a higher tinting
strength after the same grinding time.
SACHTOpERSE HUa material with a d50 of ~0.04 µm, is notable in parti-
cular for its totally haze-free incorporation into coatings.
SACHTOPERSE can therefore be recommended for black
pigment preparations on a carbon black basis, and also
for dark red and blue hues, for which BLANC FIXE mi-
cro may not be sufficiently transparent. The way in which
SACHTOPERSE particles adhere to the particles of co-
loured pigment, preventing flocculation with certainty, is
clearly apparent here: Additional information and detailed
guidelines on formulation modification can be found in
the „Functional Additives for colour pastes and pigment
preparations“ leaflet and „Sachtoperse trouble shooter“
leaflet.
Transmission electron microscopic image of
SachToperSe hU (smaller, darker particles) and orga-
nic pigments (larger, lighter particles) in a paint film.
Tin
tin
g s
tren
gth
[%
]
minutes Skandex - dispersion
200
175
125
150
100
10 20 40 60 90 120 180
Plot of tinting strength for Hostaperm Violet
without micro
15 % micro
20 % micro
16
Mechanical propertiesThanks to its spherical particle shape and low oil absorp-
tion (with benefits for free binder), BLANC FIXE exhibits
generally good performances in mechanical tests, such as
the Erichsen indentation test, the cross-cut test, etc.
One of the main applications for BLANC FIXE micro is in
automotive primers where, in addition to other benefits, it
permits achievement of excellent stone-chip resistance.
Influence on rheologyEven at extremely high concentrations, BLANC FIXE grades
with particle sizes of up to 0.7 µm have practically no
effects on viscosity. BLANC FIXE micro‘s low binder de-
mand, in particular, permits high extension levels and low
VOC, with no negative effects on viscosity, no loss of gloss
and no harm to any other paint-system properties - but
with a simultaneous reduction in formulation costs!
To move on to the BLANC FIXE grades of smaller parti-
cle sizes, there is, in high concentrations, a built up of a
yield point. This can be used as a special performance of
SACHTOPERSE HU: building up this yield point improves
edge coverage and anti-sagging and is beneficial for corrosi-
on resistance. In contrast to other materials SACHTOPERSE
combines the building up of a yield point with an increa-
sed gloss.
DispersibilityThe dispersibility of BLANC FIXE is a function of parti-
cle size and organic or inorganic after-treatment, and
is a key aspect in the development of new products.
As a general rule, the finer the particles, the more am-
bitious the dispersion. BLANC FIXE N (3 µm) can be dis-
persed using a simple dissolver, whereas dispersion of
BLANC FIXE F (1 µm) is more complex, and is not possible
in all cases and in all formulations. Thanks to its organic
treatment (coating), BLANC FIXE micro is significantly more
dispersible than BLANC FIXE F, despite its smaller particle
size. Dispersion using a dissolver is therefore possible.
Stone-chip resistance
BLANC FIXEmicro
BLANC FIXE N synthetic BaSO4 No.1
synthetic CaCO3
Yie
ld p
oin
t [P
a]
Particle size [µm]
100
120
80
40
60
0
20
0 0.2 0.4 0.6 0.8
Yield point built up of BLANC FIXE in glycol
10% BaSO4 EVC: 2.6%
20% BaSO4 EVC: 5.2%
30% BaSO4 EVC: 7.9%
The BLANC FIXE product range for industrial coatings: from fillers to additives
BLANC FI
XE F /
Super
F
SACHTO
PERSE
HP
SACHTO
PERSE
HU
3 1 0.7 0.2 0.04 µm
BLANC FI
XE N
BLANC FI
XE micr
o / PL
US
17
Functional Fillers and Inorganic Additives
NEW pRODUCTBLANC FIXE micro pLUSCustomers‘ demands for greater dispersibility have no-
netheless increased in recent years. Our newly developed
BLANC FIXE micro PLUS therefore incorporates superior
dispersibility, permitting improved ultimate fineness or
a shorter grinding time. Additional information can be
found in the "BLANC FIXE micro PLUS - A new member
of the BLANC FIXE micro family".
fin
enes
s [µ
m]
Dispersion time [min]
18
20
16
12
14
6
8
10
0
4
2
2 min 5 min 10 min 15 min
BLANC FIXE micro PLUS with increased dispersibility
micro water borne systemmicro solvent borne systemmicro PLUS water borne systemmicro PLUS solvent borne system
18
Sachtleben‘s initial recommendations for industrial paints
and coatings are provided in the following tables. In
addition, various other Sachtleben grades and products
can be efficiently and cost-effectively used, depending on
the user‘s ultimate application and requirements.
Sachtleben recommendations for Industrial Paints and Coatings
White pigments
SAC
HTL
EBEN
RD
3
SAC
HTL
EBEN
R66
0
SAC
HTL
EBEN
RD
I-S
SAC
HTL
EBEN
RO
DI
SAC
HTL
EBEN
R21
0
SAC
HTL
EBEN
R32
0
HO
MBI
TAN
LC
-S
HO
MBI
TAN
LW
SAC
HTO
LITH
L / H
D-S
LITH
OPO
NE
30 %
L /
DS
General Industrial / Interior
General Industrial / Exterior
Paste & Pigment Preparations
UV-Curing
Anti-Corrosion / Marine Coatings
Undertone: bluish, neutral, warm b n b w w w b b n n
Inorganic additives and Functional fillers
BLA
NC
FIX
E N
BLA
NC
FIX
E F
BLA
NC
FIX
E m
icro
BLA
NC
FIX
E m
icro
PLU
S
SAC
HTO
PERS
E H
P
SAC
HTO
PERS
E H
U
UV-
TITA
N L
530
HO
MBI
TEC
RM
300
General Industrial
Paste & Pigment Preparations
UV-Curing
Anti-Corrosion / Marine Coatings
made in Germany made in Finland
All marked products reflect our first recommendation. In addition, our other grades can be efficiently used depending on customer`s requirements.
Great Solutions with Small Particles
04
.12
7.0
2.1
1.e
Sa
chtl
eben
do
es n
ot
gu
aran
tee
the
accu
racy
, to
pic
alit
y, c
orr
ectn
ess,
co
mp
lete
nes
s, q
ual
ity
or
use
fuln
ess
of
any
info
rmat
ion
pro
vid
ed.
An
y lia
bili
ty c
laim
s in
co
nn
ecti
on
wit
h s
uch
info
rmat
ion
are
exc
lud
ed.
Sachtleben Chemie GmbH A company of Holdings, Inc. P.O. Box 17 04 54 • D-47184 Duisburg / Germany E-Mail: [email protected] • www.sachtleben.com
Sales Office Coatings: Phone +358 10 430 1805 E-Mail: [email protected]
