Baytec®MAX - BaySystems - customized polyurethanes - Bayer ...

MDI amine-crosslinked
prepolymers
With its new MDI prepolymers for higher-performance,
easy-to-manufacture system components,
Bayer MaterialScience is moving into
industrial applications that were previously
only accessible using TDI systems.
The ultimate polyurethane elastomers
The new Baytec ® MAX product group from
Bayer MaterialScience combines the benefits of
conventional MDI and TDI casting systems.
Because it is far easier to process and is extremely
stable, Baytec ® MAX provides elastomer
manufacturers with a far more reliable material.
The much reduced vapor pressure of the MDI
is particularly popular with TDI processors.
All of these factors are high up on the
wish-list of every elastomer manufacturer
who values reliability and quality.
Properties
Reduced vapor pressure
The very low vapor pressure of Baytec ® MAX
prepolymers is a great advantage during
processing.
Easy processing
Crosslinking with diamines means that processors
can manufacture high-quality polyurethane
elastomers using a process that is far less sensitive
than that used for conventional MDI systems.
Mechanical processing
Processing conditions and mixing ratios are similar
to those of TDI systems. When using liquid
crosslinkers, conventional MDI casting machines
can often be used during production. As a
result, switching to Baytec ® MAX can help avoid
the need to invest in a new plant or machine.
Manual processing possible
Depending on which crosslinker has been selected,
even manual processing is possible.
Good combination of mechanical properties
– excellent compression set
– good tear propagation resistance
– high tensile strength
– low abrasion
Broad range of hardnesses from 50 Shore A
to 60 Shore D
Besides the usual range of hardnesses from
70 Shore A to 60 Shore D, the Baytec ® MAX
range – when using Baytec ® XL 1701 or TMP/TIPA –
now also offers polyurethane elastomers
with improved abrasion resistance, tear propagation
resistance and tensile strength –
especially at hardnesses below 70 Shore A.
High heat resistance
Thanks to diamine crosslinking, Baytec ® MAX
offers greater heat resistance than glycolcrosslinked
MDI systems. The result is that,
when using Baytec ® XL 1604, shear
modulus (stiffness) remains unaltered over a
temperature range of approximately 30 – 130 °C.
Elastomers that have been crosslinked
using MCDEA exhibit far greater heat resistance.
Excellent compression set values
The extremely low compression set values are
ideal for applications where materials have
to recover from loads rapidly, and they significantly
outperform elastomers made from
thin-film TDI polymers.
Compression set values: Baytec ® MAX
– approx. 70 Shore A (PTMEG/Baytec ® XL 1701)
after 24h/100°C approx. 45%
– approx. 55 Shore A (Polyester/TMP/TIPA)
after 24h/70°C