dtm polyaspartic coatings - railcar-techrailcar-tech.org/wp...marts-rail-show_polyaspartic... ·...
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covestro.com
DTM Polyaspartic Coatings Field performance update
9/18/2017 MARTS
Ahren Olson
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This presentation may contain forward-looking statements based on current
assumptions and forecasts made by Covestro AG or subgroup management.
Various known and unknown risks, uncertainties and other factors could lead
to material differences between the actual future results, financial situation,
development or performance of the company and the estimates given here.
These factors include those discussed in Covestro’s and Bayer’s public
reports which are available on the Covestro website at www.covestro.com as
well as on Bayer AG’s website at www.bayer.com. Covestro assumes no
liability whatsoever to update these forward-looking statements or to conform
them to future events or developments.”
Disclaimer: Forward-Looking Statements
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Agenda • Brief technology review
• Case History
• Summary
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+ N C R’ O
X
N H
R R
X
N C
O
R’
H
N
R R
Isocyanate Aspartate Aliphatic Urea
R N C O R N C
H
OR’ + R’ OH
Isocyanate Polyol Urethane
O
Polyaspartic coatings are based on polyurea chemistry
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Application
Fast cure with potlife
High film build
Spray, brush, and roll
Physical Properties
Color and gloss retention
Edge retention
Corrosion resistance
Polyaspartic coatings bring both application and physical
property advantages
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• Increasing throughput by faster drying and handling times
• Combining the benefits of the epoxy and the polyurethane
• Excellent low temperature cure
Increased shop throughput without sacrificing performance
STEEL
EPOXY
POLYURETHANE
STEEL
POLYASPARTIC
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Storage Tanks
Rail Cars
Stadiums
Bridges
Diverse market applications for polyaspartic coatings
Wind Turbine Towers
Piping
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• ~ 250 Hopper cars coated with a DTM polyaspartic between 2002-2003
• Steel blasted to SSPC-SP 6 / NACE No.3
• Two applicators applied 8-10 mils DFT
• 40 min/car
Case history – original application 2002
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• Excellent application
in hard to coat areas
• ~30% Savings in time
and labor
Coating System Material
Usage
Labor
Usage
DTM
Polyaspartic
36 Gallons 10.5 Hours
2 Coat Epoxy/
Urethane
35 Gallons 15.5 Hours
Original application replaced epoxy/polyurethane
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Decals applied 3-4 hours after application
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• Originally painted 2002
• 14 years in service with less than 0.1% rusting
• Performance equal to epoxy / polyurethane systems
2002 2016
Case history – 14 years of solid performance
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LUPX 60676 - PAS LUPX 60630 – EP/PUR
Case history – equal performance to epoxy/polyurethane
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Case history – excellent performance
LUPX 60758 LUPX 60798
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Excellent protection on welds
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Excellent protection in hard to coat areas
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Resistance to rust undercutting
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Car Number Coating
System
%
Rusting
Average
Coating DFT
(mils)
Number of
DFT
Readings
LUPX 60607 DTM PAS <0.1 ~ 6.0 54
LUPX 60676 DTM PAS <0.1 ~ 6.2 57
Case history – Significant DFT remain after 14 years in service
• After 14 years, ~ 3 mils have eroded / chalked away.
This equates to a rate of ~0.2 mils per year
In comparison aromatic epoxies erode / chalk at a rate of ~1.0 mils per year
• At the current rate, after another 10 years, ~ 4 mils of polyaspartic coating should be protecting the
steel
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• Polyaspartic coatings can increase throughput in painting operations by
reducing the number of layers and providing quick drying characteristics
• Based on field experience, 8-10 mils of polyaspartic is expected to last 20-
25 years prior to repainting
Summary