RHEOLATE HX 6008 - Elementis Specialties · gloss/satin latex paints, ... the sagging performance...
Transcript of RHEOLATE HX 6008 - Elementis Specialties · gloss/satin latex paints, ... the sagging performance...
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RHEOLATE®
HX 6008
Extremely high efficient nonionic synthetic associative thickener (NiSAT) for
excellent high shear viscosity with additional low and mid-shear viscosity
contribution
Key Benefits
Extremely high efficiency
Suitable in a
broad range of latex chemistries
Low influence on
final coating properties
Application Leaflet
October 2014
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Introduction
RHEOLATE®
HX 6008 is a novel nonionic synthetic associative thickener (NiSAT) which has outstanding rheological properties for aqueous applications. It develops high shear viscosity (ICI) very efficiently, and additionally displays some mid-shear viscosity contribution. RHEOLATE
® HX
6008 is effective in a broad range of latex chemistries.
Chemical and Physical Data
Composition Solution of apolyether polyurethane polymer in water
Appearance Opaque liquid
Specfic gravity 1.05 g/ml
Active solids (% by weight)
25%
Brookfield viscosity
(RVT, spindle 4, speed 20 rpm, @25°C)
1000– 4000 mPa·s
pH 4 - 6
VOC
(ASTM D 6886-03) < 0.2%
Incorporation and Levels of use
RHEOLATE® HX 6008 can be used as supplied or, if necessary, further diluted with water. Addition can take place at any time during the manufacturing process, but incorporation into the mill base before the letdown is recommended. RHEOLATE® HX 6008 can be combined with other associative rheological additives, clay based thickeners or cellulosic thickeners for higher packaged viscosity. It is important to assess the effectiveness of RHEOLATE® HX 6008 in the entire system, as performance can be affected by other raw material ingredients. Further detailed background information on the technology of nonionic synthetic associative thickeners can be found in the Elementis Specialties RHEOLOGY HANDBOOK.
Typical use levels of RHEOLATE® HX 6008 are in a range 0.1% to 1.5% (product weight) related to the total system weight.
Key Benefits
Extremely high efficient thickener with both ICI and KU properties.
Compatible in various resin systems and especially efficient with acrylic and sty-rene acrylic resins.
Excellent balance of sag, flow, and lev-elling.
Minimal effect on final paint properties.
EU Ecolabel confirmation available.
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Overview of tested paint systems
RHEOLATE®
HX 6008 was evaluated in several paint formulations:
Subject: Comparison in binder technologies
● Pure Acrylic Based Paint (PVC 30%) Page 4
For exterior coatings, plasters and external wall insulation systems and
primers
● Styrene Acrylic based Paint (PVC 50%) Page 6
For interior paints, textured finishes, gloss/satin latex paints, primers
and silicate emulsion paints
Subject: Complexity in paint formulations
● Pure Acrylic based Paint (PVC 30%) Page 9
For exterior coatings, plasters and external wall insulation systems and
primers
Subject: Influence on final coating properties
● 1C Acrylic High Gloss Clear Wood Coating Page 10
For parquet varnishes, wood stain sealers, MDF, and furniture coatings
● Waterborne High Gloss White Alkyd Paint Page 12
For high gloss decorative (DIY) paints and for industrial paints
.
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Emulsion paint PVC 30% pure Acrylic Raw material Weight in
% Function Supplier
Millbase stage Tapwater 7.55 Diluent
Add under stirring in the denoted order NUOSPERSE® FX 504 0.10 Dispersing agent Elementis Specialties DAPRO® DF 7005 0.20 Defoamer Elementis Specialties Sodium polyphosphate 0.50 Softener BK Giulini
Titanium dioxide 4.10 Pigment Kronos International
Calcium carbonate, various particle size 21.7 Extender Omya
Micro Talc 2.40 Extender Mondo Minerals
Aluminium silicate 1.10 Extender Evonik
Grind for 15 min. at 10 m/s. Add and stir for further 10 minutes at low speed
DAPRO® DF 7005 0.05 Defoamer Elementis Specialties Tapwater 10.00-X Diluent
Add under stirring Mowiltith LDM 7717 51.55 Binder Celanese
Dowanol DPnB 0.55 Coalescing agent Dow Add and stir slightly for 10 min.
Rheological additive(s) X Rheological additive
Ammonia Solution w=25% 0.15 pH adjustment
Parmetol A 26 0.05 In can preservative Schülke&Mayr
100.00
Loading level comparison at equal ICI viscosity of 2.2P
1% of RHEOLATE® HX 6008 was sufficient
to obtain the required ICI viscosity of 2.2P
measured with an ICI-rheometer.
The high efficiency of RHEOLATE® HX 6008
required the lowest amount of thickener to
obtain the same ICI viscosity of 2.2P.
Efficiency Evaluation in a Pure Acrylic based Paint
Pure Acrylic based Paint (PVC 30%) Formulation
The test formulation was based on
an aqueous copolymer emulsion
of acrylic/methacrylic acid esters.
The APEO-free binder has a solid
content of 46%, Tg of 23°C and a
particle size of 120 µm. It is
commonly used in exterior
coatings e.g. for masonry paints
containing coalescing agents,
deep shade paints, plasters and
textured coatings, external wall
insulation systems and primers.
Test Formulation
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The flow curve of the paint based on RHEOLATE® HX 6008 confirmed the additional contribution to the
low-mid shear viscosity in comparison to the paints with reference thickeners.
Rheogram
By adjusting the formulations to an equal ICI-viscosity value the resulting Krebs-Stormer viscosity will
vary. 1% of RHEOLATE® HX 6008 yielded the largest KU contribution and resulted in a ready to apply
paint. The Krebs-Stormer viscosities of the paints with reference thickeners were too low for practical use
and required additional adjustments with a KU-thickener to increase mid shear viscosity.
Mid shear viscosity build
Efficiency Evaluation in a Pure Acrylic based Paint
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Efficiency Evaluation in a Styrene Acrylic based Paint
This evaluation was made
with Acronal S790. Market
feedback confirmed the
functionality in this latex
technology. The binder is
APEO-free, has a solid
content of 50%, a MFT of
20°C and a particle size of
100 µm. The binder is
generally used for interior
paints, textured finishes,
gloss/satin latex paints,
primers and silicate emulsion
paints. It can be suitable for
exterior paints, concrete
protection coatings and
exterior insulation systems.
Only 1.8 % of RHEOLATE® HX 6008 was needed to achieve an ICI-viscosity of 2.2P, which is in this test
the lowest required loading level. The reference formulations needed at least 3.2% of thickener in order to
achieve the target viscosity.
Emulsion Paint PVC 50% Styrene Acrylic
Raw material Weight in %
Function Supplier
Millbase stage
Tapwater 14.90 Diluent
Add under stirring in the denoted order
Sodium polyphosphate 0.10 Softener BK Giulini
NUOSPERSE® FX 504 0.10 Wetting agent Elementis Specialties
DAPRO® DF 7005 0.30 Defoamer Elementis Specialties
Titanium dioxide 5.80 Pigment Kronos International
Calcium carbonate, various particle size
30.9 Extender Omya
Micro Talc 3.40 Extender Mondo Minerals
Aluminium silicate 1.50 Extender Evonik
Grind for 15 min. at 10 m/s.
Add and stir for further 10 minutes at low speed
DAPRO® FX 511 0.80 Coalescing agent Elementis Specialties
Acronal S 790 32.10 Binder BASF
DAPRO® DF 7005 0.10 Defoamer Elementis Specialties
Tapwater 9.70-X Diluent
Add and stir slightly for 10 min.
Rheological additive(s) X Rheological addi-tive
Ammonia Solution w=25% 0.20 pH adjustment
Parmetol A 26 0.10 In can preservative Schülke&Mayr
100.00
Loading level comparison at equal ICI viscosity of 2.2P
Styrene Acrylic based Paint (PVC 50%) Formulation
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Efficiency Evaluation in a Styrene Acrylic based Paint
Mid shear viscosity build
A Krebs-Stormer viscosity of 90 was obtained with 1.8% of RHEOLATE® HX 6008, which represents an
acceptable level for application.
Rheogram
The rheogram shows that RHEOLATE® HX 6008 increased the viscosity over the full shear rate range
up to 1000 s-1. The reference thickeners in this latex technology yielded lower KU-viscosity values com-
pared to RHEOLATE® HX 6008. They needed a small adjustment with a second KU-builder to reach
workable viscosities.
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Complexitiy Reduction Evaluation
Pure Acrylic based Paint (PVC 30%) Formulation
The reference formulations did not achieve both ICI-
and KU-viscosity targets with only one thickener.
They required a larger quantity of an ICI-thickener
and a small additional amount of KU-builder.
With RHEOLATE® HX 6008 however, only one
thickener was needed to reach both mid and high
shear viscosity targets. Moreover, with RHEOLATE®
HX 6008 the rheological profile was obtained with the
highest efficiency, i.e. the lowest total amount of
thickener was required.
Loading level
Rheological Additive KU ICI
[unit] [P]
RHEOLATE® HX 6008 117 3.0
Combination 1 117 3.2
Combination 2 119 2.8
One way to control costs in paint production is by reducing the complexity. This can, amongst others, be
achieved by the reduction of the number of raw materials that simplifies the formulation.
Many formulating practices require a combination of a high shear and a low shear thickener in order to
meet a targeted rheological profile. RHEOLATE® HX 6008 has the ability to take over the functions of both
high shear and a low shear thickener and aids to simplify the paint formulation.
To illustrate this property of RHEOLATE® HX 6008 we evaluated the replacement of a combination of two
thickeners by just RHEOLATE® HX 6008 in a PVC 30% acrylic paint.
The paints were formulated at equal ICI viscosities of 3 ± 0.2P and equal KU-viscosities of 118 ± 1P.
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Complexitiy Reduction Evaluation
Loading Sag re-
sistance Levelling Brush-out Roller Spatter
Rheological Additive
[%] [µm] 0 - poor
10 – excellent
0 – poor
5 – excellent
RHEOLATE® HX 6008 1.5 400 3 4-5 5
Combination 1 ICI KU
3.4 0.3
400 3-4 5 5
Combination 2 ICI KU
2.0 0.1
400 3 5 5
The rheogram shows that RHEOLATE® HX 6008 provided less shear thinning flow characteristics than
both formulations with thickener combinations, nevertheless RHEOLATE® HX 6008 yielded the same ap-
plication properties (see table below).
Despite the lower viscosity at lower shear rates, the sagging performance of the RHEOLATE® HX 6008
based paint is similar to the paints with the thickener combination. Also properties such as levelling, brush
-out and roller spattering behaviour were very similar. Differences can be qualified as non significant.
Rheogram
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1C Acrylic High Gloss Clear Wood Coating Formulation
Evaluation of the Influence on Final Coating Properties
1 C High performance wood coating (Glossy) Raw material Weight in
% Function Supplier
Alberdingk AC 2714 83.00 Binder Alberdingk Boley
Add under stirring in the denoted order
DAPRO® DF 900 1.60 Defoamer Elementis Specialties
DAPRO® W-77 0.50 Substrate wetting Elementis Specialties
Dowanol DPM 4.00 Coalescing agent DOW
Dowanol DPnB 5.00 Coalescing agent DOW
Rheological additive(s) X Rheological additive
Water 5.90-X Diluent
Disperse for 10 min. 6 m/s
100.00
To achieve a stable DIN 4 cup viscosity of 100 seconds, the formulation with RHEOLATE® HX 6008
required a significantly lower loading level than the formulation with the reference thickener system. The
blank formulation without thickeners had a DIN 4 mm cup viscosity of 14 seconds. At equal DIN 4 cup
viscosity, the formulation with RHEOLATE® HX 6008 showed higher Brookfield viscosity over the full
shear rate range.
The acrylic binder emulsion is a universal self-crosslinking multiphase acrylic dispersion. The binder has
a solid content of 44%, MFT of 50°C and Koenig pendulum hardness of 105.
It is commonly used for parquet varnishes, wood stain sealers, concrete floorings, MDF, furniture and
general plastics like ABS, PC, etc.
Comparison of loading level respectively Brookfield Viscosity at equal
formulated DIN 4 cup viscosity
Brookfield Viscosity
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Evaluation of the Influence on Final Coating Properties
Influence on film properties
The initial hardness of the clear coat containing RHEOLATE® HX 6008 was already on a higher level
than the reference clear coat and over time the hardness continued to develop much faster. This illus-
trates that RHEOLATE® HX 6008 has limited influence on the primary coating properties.
The same trend was found for the obtained gloss. The gloss of the clear coat based on RHEOLATE® HX
6008 was much higher.
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The main binder, WorleeSol E 150 W, is a waterthinnable polyurethane modified alkydemulsion with a
solid content of 40% in water. The alkydresin has an oil content of 40% and an acid number of max. 30.
The emulsion is multifunctional applicable. It is especially recommended for high gloss systems in the
decorative segment and also for industrial paints.
Evaluation of the Influence on Final Coating Properties
Waterborne High Gloss White Alkyd Paint Formulation
Waterborne High Gloss White Alkyd Paint
Raw material Weight in %
Function Supplier
Water 5.00 Diluent
NUOSPERSE® FX 600 1.00 Dispersing agent Elementis Specialties
NUOSPERSE® FX 365 0.25 Dispersing agent Elementis Specialties
Kronos 2190 22.50 Pigment Kronos International
DAPRO® DF 7580 0.20 Defoamer Elementis Specialties
Disperse 1-5 for 30 minutes at 10 m/sec. tip speed (fines of grind < 10µm)
WorleeSol 65R 10.20 Resin Worlee-Chemie GmbH
Propylene glycol 2.10 Solvent
Water 4.00 Diluent
Add 6-8 under stirring in the denoted order
Add 9 – 14 under stirring slightly for 10 minutes
WorleeSol E 150W 49.30 Resin Worlee-Chemie GmbH
Borchi® OXY Coat 1101 0.30 Dryer OMG-Borchers GmbH
Rheological additive(s) X Rheological additive
DAPRO® DF 7580 0.10 Defoamer Elementis Specialties
Water 5.05-X Diluent
100.00
Rheogram
Both formulations displayed only marginal differences in the flow characteristics.
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Evaluation of the Influence on Final Coating Properties
Rheogram and Storage stability
The initial rheograms of the alkyd paints based on RHEOLATE® HX 6008 and the reference formulation
based on two thickeners were almost identical (bold lines).
After storage of the paints for four weeks at 40°C, both paints showed a decrease in viscosity, but the
paint based on RHEOLATE® HX 6008 showed a smaller viscosity decrease and thus was more stable.
Brookfield Viscosity
Rheological Additive Loading KU
Brookfield viscosity [mPa.s]
RVT setup 6 Spin. 6 ICI
[%] 10 rpm 20 rpm 50 rpm 100 rpm [unit] [P]
RHEOLATE® HX 6008 0.5 2500 2400 2060 1760 96 1.7
Combination 1 ICI KU
0.24
0.07 2500 2300 2000 1710 96 1.5
With RHEOLATE® HX
6008 as sole thickener
a similar Brookfield vis-
cosity was achieved.
Application Properties of high gloss alkyd emulsion paints based on Worleesol
E 150W
With RHEOLATE® HX 6008 the application performance of a PU-modified alkyd based paint can be im-
proved in terms of sag resistance and brush-out. The paint becomes more robust and shows less sensi-
tivity on the development of surface defects.
Rheological Additive
Loading Sag resistance Levelling Brush-out Surface
defects
Storage
stability
[%] [µm] 0 - poor
10 – excellent
0 – poor
5 – excellent
RHEOLATE® HX 6008 0.5 350 6 5 4 5
Combination 1 ICI KU
0.24
0.07 300 6 4 3 4
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Elementis UK Ltd
c/o Elementis GmbH
Stolberger Strasse 370
50933 Cologne, Germany
Tel: +49 221 2923 2066
Fax: +49 221 2923 2011
Elementis Specialties Asia
No. 99 Lian Yang Road
Songjiang Industrial Zone
Shanghai 201613
P.R. China
Tel: +86 21 57740348
Elementis Specialties, Inc.
469 Old Trenton Road
East Windsor, NJ 08512
USA
Tel: +1 609 443 2500
Fax: +1 609 443 2422
Learn more about our products
and visit our website!
www.elementis-specialties.com
or email us at:
RHEOLATE® HX 6008 is an extremely high efficient next generation nonionic synthetic associa-
tive thickener for water-borne systems that
Provides excellent high shear rate viscosity build (ICI) with additional low and mid-shear
contribution
Provides savings up to 60% of the amount of thickener depending on the latex chemistry
Reduces complexity in formulation and production
Can help to reduce the number of raw material in the portfolio
Has less adverse effects on paint film properties or can even improve them
Has an EU Ecolabel confirmation readily available
RHEOLATE® HX 6008 performance summary