POLYASPARTICS
CHANGE THE COATINGS GAME
Desmodur® | Desmophen®
Contents
Our Mission: INVENTING FOR YOU 4 – 5
Building blocks for supply security, efficiency and sustainability 6 – 7
Polyaspartics – the game-changing benefits 8 – 9
Polyaspartic applications10 –19
Polyaspartics chemistry – and our portfolio
20 – 21
Fast-lane access to polyurethane innovations22 – 23
3
INVENTING VISIONS FOR YOU.
As your leading partner for polyurethane solutions,
Living up to this aspiration needs more than com-
we know you are competing in increasingly chal-
petencies – it needs a corporate culture defined
lenging environments: Your customers are beco-
and lived by dedicated people who share a set of
ming more and more demanding in their expecta-
fundamental values. An attitude of openness that
tions for quality, durability, sustainability and
invites you to co-create new things – rather enab-
aesthetics of products. And they have more
ling you than just providing. An unrivaled perfor-
choices. For you this means that cost pressure is
mance orientation to constantly strive for the bet-
rising – while innovation cycles are becoming fas-
ter, be it through big or small changes. A true
ter and faster.
sense of business regardless of function. And a
deep commitment to delivering our promise every­
So what you are asking for quite rightly is to make
day. Anywhere. Again and again.
our invention power work for you – by improving
your productivity, driving sustainability, ensuring
reliability and co-creating future proof businesses.
INVENTING FOR YOU.
Thus, we are committed to constantly search for
things that will make a real difference to you.
Things that will make your business grow, help
you drive profitability, make your solutions safer.
This we do with a very specific understanding of
innovation which we call inventing.
Inventing always starts with thinking about your
unmet business challenges. It requires an indepth understanding of your needs along the
whole value chain – and building and fostering
close and trustful partnership with you. To make
sure: What we invent stands the test of time.
5
Building blocks for supply security,
efficiency and sustainability
Solutions to enhance your process efficiency
as well as tailored supply chain flexibility with
Nowadays, the quality demands made on indus-
short lead times, Bayer MaterialScience offers the
trial processes are very high. But at the same time
industry unrivalled supply security and assured
there is a clear need to cut costs. Both goals can
quality.
be achieved by increasing process efficiency. The
complexity of the processes involved in manufac-
High-performance coatings –
turing coatings offers us various opportunities to
enabled by nature
enhance process efficiency. Significant process-
Sustainability drives innovation at Bayer. We
optimizing and cost-cutting gains are possible,
are committed to optimizing our manufacturing
for example through faster curing and shorter
processes, reducing the impact of logistics, and
process times. At Bayer we have a wide range
enabling sustainability along the value chains.
of solutions designed to enhance your process
Renewable feedstocks offer opportunities for
efficiency. Why not take advantage of our know-
developing more sustainable building blocks
how? These solutions will be good for your bot-
for coatings and adhesives – with significant
tom line.
potential for reducing the carbon footprint of
end products while also reducing our overall
Outstanding quality and supply security –
dependence on fossil-based resources. But to
worldwide
make more sustainable solutions not just pos-
Bayer MaterialScience, the world’s leading manu-
sible but also economically feasible, the perfor-
facturer of aliphatic and aromatic isocyanates,
mance of all our feedstocks needs to satisfy high
offers an extensive range of raw materials and
industry standards. To this end, we are eval-
services for coatings’ manufacturers. This allows
uating the use of renewable raw materials and
the very latest technology to be used extremely
will enlarge our product portfolio with new bio-
effectively for a variety of applications. Thanks
based and mid- to long-term cost-competitive
to its unique setup and worldwide network of
products, provided the raw materials become
state-of-the-art production sites, R&D facilities
commercially available. In all these efforts we are
and customer technical centers, industry-leading
committed to focusing on products that perform
supply chain setup, global orientation and local
at least as well as established products but are
stocks, extremely large product portfolio, highest
at the same time more sustainable.
health, safety and environmental (HSE) standards,
7
Polyaspartics –
the game-changing benefits
Nowadays, machine manufacturers, owners of
This increased efficiency is particularly impor-
commercial or industrial premises and other
tant in a chain of operations where the coating
relevant decision-makers want durable coatings
process can often act as a bottleneck. The two
that meet scheduling demands and just-in-time
benefits of rapid drying and reduced number of
delivery requirements while at the same time
coats significantly boost productivity. In practice,
protecting their assets. Without sacrificing perfor-
the overall coating process, i.e. the application
mance, 2K polyaspartic coating technology offers
of all coats plus drying time, can be two or three
greater productivity and durability for applications
times faster than with conventional coatings.
in the industrial maintenance and OEM markets.
Whether for bridges, stadiums, large buildings,
Energy costs and CO2 savings
flooring or architectural elements, polyaspartic
The unique reactivity of aspartics with aliphatic
coating technology brings cost savings in appli-
polyisocyanates makes their reaction kinetics
cation and enables normal working to be resumed
more independent of temperature than is the
in the shortest possible time. That is why poly-
case with conventional 2K coating technologies.
aspartics can indeed change the coatings game.
Especially in OEM paint shops, polyaspartic coatings contribute significantly to reducing energy
Increased productivity and cost efficiency
costs and CO2 emissions – both factors of increas-
The main benefit of polyaspartic coatings is that
ing importance.
they significantly increase productivity in the
8
application process. This gain in productivity over
From ultra-high solid to solvent-free
conventional topcoats is achieved thanks to two
Increasingly strict legislation demanding reduc-
properties of polyaspartic coatings:
tions in volatile organic solvents necessitates
•Significantly faster drying times at room tem-
the use of low-solvent coating materials. In the
perature – usually between 1.5 and 4 hours –
case of OEM coatings for plant and machinery
which allows for additional treatment or trans-
this is particularly relevant when conventional
port of the coated parts to be carried out
coating materials have to be replaced. However,
sooner.
many low-solvent or solvent-free coating mate-
•Much greater film thickness, e.g. a dry film
rials require an investment in new equipment
thickness of up to 400 μm in a single opera-
and/or modifications to the production process.
tion, which in practice means one less coat is
Since this is often impossible or simply too
required.
expensive, coating materials that can be used
with existing equipment are of particular interest.
Long-lasting performance
Low-solvent coating materials, which (depending
In general, the well-known positive attributes
on the application) either have a VOC content of
of aliphatic 2K polyurethane coatings are also
less than 250 g/l or are virtually solvent-free in
found in 2K polyaspartic coatings, e.g. high gloss
their ready-to-use state, can be produced on a
retention during weathering, adjustable flexibility
polyaspartics basis to comply with current legis-
through the polyisocyanate chosen, resistance to
lative requirements, e.g. the EU VOC Directive or
acids and alkali, high mechanical resistance (e.g.
the South Coast Air Quality Management District
abrasion resistance and impact strength) and
in California.
ease of repair. The key benefits that determine
the success of polyaspartic coatings are illustrated
here:
CIENCY
E F FI
RAPID CURING/DRYING
FEWER COATS
EASY APPLICATION
QUALITY
CUSTOMER AND END-USER
INDUSTRIES
HIGH APPEARANCE
LONG-LASTING
PERFORMANCE
EN
VIRONMENT
SOLVENT-FREE
AND HIGH SOLID SYSTEMS
LOW ENERGY
CONSUMPTION
Fig. 1: Key benefits in the success of polyaspartic coatings
9
Polyaspartic
applications
Polyaspartics for industrial coatings/corrosion protection
Thanks to their high productivity, polyaspartics are already being used for a variety of metal coatings.
One of the main applications is the OEM coating of steel parts for corrosion protection and industrial
coating purposes.
• Industrial coatings
In the field of industrial coatings, polyaspartics
for forced drying at elevated temperatures. The
are widely used for coating agricultural and
two-coat system frequently used at present for
construction machinery. The size and weight of
such machines can be replaced by a one-coat
such machines mean they are often unsuitable
polyaspartic topcoat.
primer
2K PU topcoat
DTM polyaspartic topcoat
Fig. 2: Replacement of the primer by a direct-to-metal polyaspartic topcoat
• Corrosion protection
In the case of the three coats frequently applied for
are in the field of OEM coatings. Numerous prac-
heavy-duty corrosion protection, e.g. on bridges
tical examples in the past have demonstrated the
and wind turbines, the intermediate coat can be
suitability of polyaspartics for heavy-duty corro-
replaced by a polyaspartic topcoat (see figure
sion protection.
below). The main applications for polyaspartics
primer
intermediate coat
2K PU topcoat
primer
polyaspartic topcoat
Fig. 3: Replacement of the intermediate coat by a polyaspartic topcoat
11
Gel coats, pore fillers and surfacers for fiber-
•Knifing putty: Low-odor knifing putties based
reinforced plastics
on highly reactive aspartates and low-viscosity
Wind turbines have to withstand extremely rug-
polyisocyanates can be formulated for a quick
ged conditions over long periods. For several
repair process and offer the benefits of easy
years now, polyaspartics-based gel coats, pore
application, rapid dry sandability, and good
fillers and fine surfacers have been used for coat-
adhesion to metal.
ing rotor blades made of glass fiber-reinforced
•Primer surfacers: Combinations of aspartates
composites to prolong the working lives of wind
with reactive thinners (aldemines), low-viscosity
turbines. These reactive systems can be applied
polyisocyanates, and a minimum amount of
by rolling (gel coats), brushing (pore fillers) or
solvent for spray application are used to for-
knifing (surfacers) at high film thicknesses, and
mulate very high-solid primer surfacers or fillers
are mainly used to fill the pores and smooth sur-
(250 g/l). Such systems are characterized by
faces of rotor blades. The high efficiency of these
rapid dry sandability, good adhesion to a wide
polyaspartic systems means that an entire paint
range of metal substrates, and excellent corro-
reactivity (fast drying and sandability). Through
on aspartics and reactive thinners in combina-
the combination of high flexibility and hardness,
tion with special low viscosity polyisocyanates
these systems show good adhesion to the sub-
offer the benefits of very fast drying times
strate and constitute a good substrate for the final
at ambient temperatures, high brilliance, and
finish, the 2K polyurethane topcoat.
good chemical resistance.
Polyaspartic systems for automotive
By using a repair coating system consisting of a
and large vehicle repairs
solvent-free putty or spot repair filler, a low-solvent
For manufacturers of repair coatings systems
primer surfacer, and a very high-solid polyaspartic
who are looking for efficiency improvements in
clear coat, it is possible not only to reduce solvent
the whole repair process, aspartics-based sys-
content and cut back on costs, but also to make
tems offer substantial savings in both cycle times
the whole repair process far more efficient (see
and energy consumption while fulfilling the end
figure below). Desmophen® NH-based refinish
users’ high quality requirements.
coatings systems are essentially time in a can!
LY
TIC CLEA
PO
I
RC
COMME
P
P O LY
AS
R
G
I
N
G
AR
SP
AT
< 2
50
G/L
SA
ND
VO
1 H 30'
Fig. 4: Efficiency of polyaspartic systems for automotive and large vehicle repairs
12
A
O
45'
TERBOR
NE
WA
C O AT
C
N
AL
SE
DI
SU
BA
SAN
PRIMER
CER
RO
TIC
FA
ZE
AR
C
PA R T I C P U
TT
R
C
•Clear coats: Very high-solid clear coats based
VO
V
O
AS
LY
sion protection.
thanks to the high film thickness and high curing
Y
PO
system can be applied in a single working day
2 H 15'
C 250 G/L
4 H
ROOM TEMPERATURE
Construction industry
weather tolerance. Polyaspartic coatings are
In the construction industry polyaspartic coatings
a logical supplement to fast-setting polyurea
have long been in use in many application areas,
technology. When applied by roller or 1K air-
such as topcoats (e.g. for polyurea, self-leveling
less spray equipment, a polyaspartic topcoat
floor coatings, parking decks or garages), stone
allows a 2-hour curing time with a pot life of
carpets (e.g. as a binder for colored sand, deco-
approx. 30 min. Consequently, the complete
rative mortars or terrazzo), waterproofing (e.g.
waterproof coating system is virtually weather-
balcony, terrace or access balconies) or sealants
independent.
(pourable joint sealants). Each field of application
• F ast-setting
garage
coating
system:
has its own individual requirements, but what
Painting small areas like a private garage (up
they all have in common is the need for speed to
to 150 m2) using a conventional coating sys-
allow normal work to be resumed as quickly as
tem is a time-consuming and labor-intensive
possible.
business. A curing time of between 8–16 hours
with the common solventborne 2K technology
Topcoats
means that contractors can only apply one coat
• P olyurea self-leveling floor coats and
per day and have to come to the site at least
parking decks: Most common floor coatings
three times. With polyaspartic coating technol-
are based on aromatics (= yellowing binders).
ogy, a 3-coat system can be applied with a
Standard 2K polyurethane topcoat technol-
roller within a day, saving significant labor costs
ogy can add color stability to the system but
and hassle for the owner. In addition, VOC and
with a curing time of approx. 8–16 hours, the
emission-free polyaspartic coating systems are
application no longer enjoys the advantage of
now the state of the art (see figure below).
Primer with chips
1st sealer
2nd sealer
Fig. 5: Fast-setting garage coating system
15
•Highly decorative photo flooring: In the
past, laying highly decorative seamless flooring
was a big job requiring a great deal of time-consuming preparation followed by artistic painting
with many small paint cans and brushes. Since
2–4 m2/h for the actual picture was normal, an
entire floor could take 5–7 days, even for small
shop-in-shop areas. But now polyaspartic coating photo floor technology has introduced a
kind of “pre-fab” work routine to the world of
floor coatings. The floor picture is printed on
fabric and applied in a lamination process on
site. Normal working can resume on the decorative flooring within eight hours so that a shop
owner, for example, will have the work done
overnight.
• C oncrete sealers for stamped and/or
stained concrete:
Stamped and/or stained
concrete can be protected against soiling and
given greater abrasion resistance by a clear
coat. Conventional sealers are solvent-based
or, in the case of waterborne 1K paints, no
longer comply with requirements such as durability, abrasion, etc. Polyaspartic clear coats not
only provide long-lasting performance, they are
also VOC- and emission-free, making them the
first choice for indoor applications.
Stone carpet binders
Seamless stone carpets are another decorative flooring alternative. Mosaic or terrazzo-like
decorative flooring can be produced through a
mixture of natural stones or colored quartz sand
(for which polyaspartics can also be used) and a
reactive binder. The fast-curing properties and
brilliance of polyaspartic coatings are a major
advantage in this field.
16
Decorative waterproofing
for outdoor applications
Balconies, roof gardens, loggias and access
balconies are exposed to sunlight and weathering. What’s more, they are often subject to significant mechanical stresses. Flexible decorative
polyaspartic waterproofing membranes are the
product of choice as they can be formulated as
solvent-free and fast-drying coatings. The resulting membranes are lightfast and resistant to
moisture, display moderate chemical resistance
properties, and have crack-bridging properties to
prevent water penetrating into the building, even
at low temperatures.
Pourable joint sealants
Pourable joint sealants based on polyaspartic
technology offer some unique advantages over
other technologies. By choosing the right products, the UV and color stability of the sealant can
be dramatically improved. Polyaspartic joint sealants also have the unique ability of curing at low
temperatures. In addition, the use of plasticizers
can be eliminated in some formulations to allow
plasticizer-free sealants to be formulated. Apart
from their good working-to-curing time ratio,
polyaspartic sealants, once cured, offer better
physical properties than conventional pourable
sealants.
In tune with market drivers
Concerted efforts to enhance effectiveness and
efficiency are more important than ever while the
quality and environmental compatibility of coatings remain crucial success factors. Polyaspartic
coatings are fully in tune with these market
drivers, with their use in different industrial and
construction applications demonstrating the key
benefits polyaspartic coatings bring. So it is
hardly surprising that they are now being used in
more and more fields of application, e.g. in-mold
or wood coatings.
19
Polyaspartics chemistry –
and our portfolio
Aspartics are sterically hindered secondary diamines (see figure below).
O
R
R
O
H
N
O
O
H
N
X
O
R
O
O
R
O
Fig. 6: General structure of aspartics
General structure of aspartics
The reactivity of aspartics with polyisocyanates can be influenced through the choice of the rest X (see
fig. above), which enables the parameters of pot life and drying time to be specifically adjusted in a
broad range (see the table below).
Our aspartics portfolio
SOLID CONTENT
[%]
EQUIVALENT
WEIGHT
PRODUCT
20
VISCOSITY @ 23 °C
[MPa · s]
CHARACTERISTICS/
APPLICATIONS
REACTIVITY
Desmophen® NH 1520
100
290
approx. 1,500
low
Desmophen® NH 1420
100
276
approx. 1,500
moderate
Good balance of pot life
and curing time
Desmophen® NH 1422
100
276
approx. 1.500
moderate
Improved working time
version of NH 1420
Desmophen® NH 1220
100
234
approx. 100
high
Fast setting spray
coatings
Desmophen® NH 2850 XP
100
295
approx. 100
low
Reactive diluent, enables solvent-free roller
application
Long pot life
Aspartics react with aliphatic polyisocyanates to form polyaspartics (see figure below).
R
R
O
R’
N
O
O
O
R
H +
R
O
Aspartic
N
O
O
R”– N=C=O
R’
O
Aliphatic polyisocyanate
H
C
N
R”
O
Polyaspartic
Fig. 7: Reaction of aspartics with aliphatic polyisocyanate to give polyaspartics
The choice of polyisocyanate, which depends on the factors listed below, influences the properties of
the polyaspartics:
• Desired VOC content
• Application
• Mechanical properties
• Adhesion to the substrate
Aliphatic polyisocyanates as co-reactants for aspartics
SOLID CONTENT
[%]
VISCOSITY @ 23 °C
[MPa · s]
NCO CONTENT
[%]
POLYISOCYANATE
CHARACTERISTICS/
APPLICATIONS
Preferred choice for solventfree applications
Desmodur® N 3900
100
23.7
730
Desmodur® N 3600
100
23.0
1,200
Desmodur® N 3390
90
19.6
500
Desmodur® XP 2763
86
10.2
2,100
Prolonged pot life
Desmodur® E 2863 XP
100
11.0
1,400
Adds flexibility
For ultra-high solids
For high solids
The wide variety of possible combinations enables the development of customized polyaspartic-based
coating materials to meet a wide range of requirements.
21
Fast-lane access to
polyurethane innovations
At Bayer innovation is in our DNA. Ever since
Otto Bayer discovered polyurethanes in 1937,
we have been driving polyurethane innovations
in coatings and adhesives as well as in other
application areas. As our partner you enjoy fastlane access to polyurethane innovations, and
can help us in developing the next generation of
polyurethanes to meet the consumer electronics industry’s upcoming challenges and needs.
What can we offer you?
•Powerful know-how on both established and
new polyisocyanates, as well as on new polyurethane hybrid technologies.
•The prospect of new application technologies
to enable efficient processes.
•More sustainable, biomass- or CO2-based
materials that do not sacrifice high performance.
Join us to shape the future!
23
MS00070904
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51368 Leverkusen
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Edition: 2015-04 · Order-No.: MS00070904 · Printed in Germany · E