The use of functional nano-metric easy-clean layers on material surfaces can reduce the dirt adsorption, facilitate dirt removal by rain, avoid dirt concentration /stripes and reduce cleaning efforts (longer intervals between cleaning and easier cleaning). OCAS, a Flemish steel research center has developed cost-competitive easy-clean coating layers that can be applied to a whole range of materials (painted metal, painted wood, plastics, glass, stone, and textile).

1. Durable easy-clean surfaces
for the building industry
Franz Hörzenberger
OCAS, ArcelorMittal Global R&D (Ghent, B)
Sirris Smart coating lab – May 19, 2011

2. Who are we?
“Onderzoekscentrum voor de Aanwending van Staal”
140 researchers, technicians and support staff
yearly budget of ± 20 million €
2 locations: Zelzate and Zwijnaarde
1 of the 14 R&D centers of ArcelorMittal
Confidential

3. It is about dirt …
Dirty surfaces impact
… aesthetics (colour/gloss change)
… visibility (impact on transmission)
… energy savings (heat flow)
… yield (conversion of sun light)
Pollution of the surface over time greatly impacts the aesthetics, visibility and transparancy

4. … and a new concept to keep surfaces clean
 Various concepts on material surfaces have been put forward for improving
the anti-stain properties.
Oleophilic
‘Sol/gel’
Active TiO2 Silicone
Oleophobic polymer
activation by UV F-based
(sunlight)
solutions
Hydrophilic Hydrophobic
Limitations related to current available technologies limit a broad commercial roll-out

5. … and a new concept to keep surfaces clean
 Various concepts on material surfaces have been put forward for improving
the anti-stain properties.
90
80 Reference
70
Oleophilic
contact angle, °
60
50
40
‘Sol/gel’ 30 easy clean
L A NCA S Active TiO2 Silicone 20
Oleophobic polymer 10
Easy-clean F-based
0
solutions
0 7 14 21 28
outdoor expsoure, days
Hydrophilic Hydrophobic
 LANCAS Easy-clean technology is based on the unique combination of
durable hydrophilic and oleophobic properties of the coating.
LANCAS combines unique properties to ensure optimal and durable easy-clean surfaces

6. A new concept based on nano-technology
LANCAS Easy-clean functionality is obtained by applying a transparent nano-
meter thick coating to the substrate material and provides the surface with
highly improved and durable anti-stain properties.
Oxide type nano-coating
Organic coating (OPTIONAL)
 Top-coat (PE, PUR, PVDF)
 Clear-coat (PE, AC)
 Powder coat (PE, EP)
Substrate
 Metal: steel, aluminum, zinc, …
 Wood: painted, laminated
 Textile: synthetic (nylon, …)
 Plastics: PE/PP/PC/PS/PMMA/PVC/…
 Glass
The LANCAS Easy-clean coating can be applied for both in- and outdoor
applications.
LANCAS Easy-clean coating is a nano-thin and invisible coating

7. A new concept based on an efficient process
LANCAS Easy-clean process techology has distinct competitive
advantages compared to the alternative application technologies
T, ° C
― Applicable to a wide range of
250 substrates, including heat-sensitive
substrates
200
― Wide process-speed window and
150 sol/gel atmospheric processing allows for
nano
100 in-line processing on existing
L ANCAS production lines
50
Easy-clean sol/gel ― Green process (no VOCs, dry)
nano
4 5
1 10 10 ² 10 ³ 10 10 log t, s
sec min hours
LANCAS Easy-clean process allows for in-line istallations and cost-competitive application

8. An active clean effect on short term
Outdoor testing demonstrates an immediate and a highly visible effect of
LANCAS Easy-clean coating on painted metal.
Reference LANCAS Easy-clean
Painted metal
samples
-
after 1 month
outdoor exposure
in Liege/Belgium
stripes
Samples illustrate the dirt pick-up and effect of rain on the reference panel (left
side) and a panel with the easy-clean coating (right side)
LANCAS Easy-clean effect immediately results in improved aesthetics of the substrate

9. An active clean effect on mid term
 Outdoor testing demonstrates a durable effect of
LANCAS Easy-clean coating on painted metal
80
79
Reference LANCAS Easy-clean
L*-value (white/grey colouration)
78
77 LANCAS'
Easy Clean
76
75
Reference
74
73
72
0 50 100 Original aesthetics of painted surface
outdoor exposure (# weeks) is kept during 2 years and over
LANCAS Easy-clean technology results in long lasting anti-stain properties

10. An active clean effect on mid-term
 Outdoor testing indicates a durable effect of LANCAS Easy-clean coating on
transparent plastic materials (e.g. polycarbonate, PMMA, …)
Example of application:
88
PC
87 LANCAS'
L* value (white/grey colouration)
Easy Clean
86
85
84 PC
Reference
83
82 Lancas Easy-clean coating ensures higher
81 transparency over long period of time thanks to
avoidance of dirt pick-up by the surface.
80
0 5 10 15 20 25
duration (# weeks) In addition, the initial transparency can be
increased by the nano coating
LANCAS Easy-clean technology can provide improved transmission on transparant substrates

11. An active clean effect on mid term
 During the outdoor exposure (Ghent, Belgium 2010/2011) the surface of
reference glass becomes less transparent due to dirt accumulation while an
Easy-clean glass surface keeps the transmission almost constant over time.
100%
transmission
90%
80%
70%
0 0.5 1 1.5 2 2.5 3 3.5
glass reference Easy Clean glass
outdoor exposure months
Remark: the LANCAS Easy-clean layers for this sample have not been optimised for good easy
clean behaviour and increase of transmission.
LANCAS Easy-clean coating avoids transmission reduction by dirt adhesion on transparant substrates
Confidential

12. An efficient easy clean effect
 Standardised lab testing by 1 preveals excellent cleaning efficiency
for LANCAS Easy-clean layers.
– Lab application of specified city dirt and simulation of rainfall
(without activation by UV light)
Reference LANCAS Easy-clean
Polycarbonate Polycarbonate
< 15% cleaning effect 85 - 95% cleaning effect
1 Cleaning Technology institute in Krefeld/Germany
LANCAS Easy-clean coating ensures dirt on the substrate is removed with rainfall

13. An active clean effect on long term
 Resistance to accelerated ageing (under high UV, T, humidity level) of
minimum 4000 hours indicates a minimum 5 - 7 years lifetime. Extended
testing on-going.
LANCAS Easy-clean
Reference
Reference
accelerated UV
testing area
Easy-clean
LANCAS
carbon black
testing area
Reference
Test:
impregnation with carbon black
solution
Accelarated testing indicates the durable effect of the LANCAS Easy-clean technology
Confidential

14. An easy clean effect
 Standard cleaning has no impact on the  LANCAS Easy-clean coating makes
LANCAS Easy-clean coating. cleaning easier.
Easy Clean
Method Load # Cycles Result 100 stainless
90 (detergent)
Scotch- No 1000 OK
% removal of sunflower oil
80
brite stainless
70 (no
soft 0.2 kg 1000 OK detergent)
60
Scotch- 50 stainless
No 1000 OK (detergent)
brite 40
0.2 kg 100 Attack 30
abrasive
20
No 1000 OK 10
Nylon
0
brush 0 100 200 300
0.2 kg 1000 OK
Flow cleaning time (s)
LANCAS Easy-clean technology facilitates removal of dirt and oil
Confidential

15. An easy clean effect
 Standardised lab testing by preveals high cleaning efficiency for
LANCAS Easy-clean layers.
– Lab application of specified household dirt (oil, mineral, soot) and water spray
(without activation by UV light
Reference LANCAS Easy-clean
Polycarbonate Polycarbonate
< 10% cleaning effect ca. 60% cleaning effect
LANCAS Easy-clean coating significantly reduces dirt adhesion and thus easiness of cleaning

16. An active clean effect on other materials
 Easy Cleanable surfaces have been designed on a wide range of materials.
– metals, plastics, wood, textile, glass, stone, …
Reference
LANCAS
Easy-clean
anodiuzed aluminium PVC laminated wood
LANCAS Easy-clean technology can be applied on a wide range of – heat sensitive – substrates

17. Summary
 Durable easy clean(able) surfaces have been designed on various
construction materials with a predicted lifetime of more than 5 – 7 years
 LANCAS specific easy-clean surface actively hinders the dirt pick-up by the
substrate, results in cleaner surfaces that are easier to clean.
 The patented technology for LANCAS Easy-clean technology relies on a
flexible atmospheric process with a wide process window, allowing the use
on heat sensitive materials.
OCAS N.V. – LANCAS, Pres. J.F. Kennedylaan 3, B-9060 Zelzate
e: contact@lancas.be www.lancas.be
Confidential