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Baytec®
MAX Amine-Curable Prepolymers from Bayer Represent a Breakthrough
in MDI Cast Elastomer Technology
Bayer
MaterialScience continues its leadership in polyurethane chemistry
with the introduction of the Baytec® MAX (MDI amine crosslinked)
prepolymer product line. The new Baytec MAX prepolymers, which complement
currently available TDI-based prepolymers, are now available in
North America
for sampling and will be commercially available later this year.
The Baytec MDI prepolymers,
consisting of novel polyester and polyether prepolymers produced
from a specialty diphenylmethanediisocyanate, demonstrate reactivities
similar to those of corresponding, free-monomer stripped 2,4-TDI
prepolymers when extended with diamine co-reactants such as MbOCA
and MCDEA, thereby producing polyurethaneurea elastomers with comparable
physical properties. This represents a breakthrough in MDI cast
elastomer technology, enabling formulators for the first time to
produce MDI-based polyurethaneurea cast elastomers with superior
mechanical properties and performance. Until now this was not possible
because the reaction of a MDI prepolymer with either an aliphatic
or aromatic amine was too fast to be of any practical utility. Click
here to download a technical paper about Baytec MAX
prepolymers.
The processing and performance advantages of the new Baytec prepolymers
include:
- Broader processing latitude compares to glycol chain-extended
MDI hot cast systems
- Low viscosities
at processing temperature
- Beneficial
effect of free-MDI monomer on elastomer properties
- Overall property
profile equal to or superior to TDI polyurethanerurea elastomers
- Outstanding
abrasion and tear properties
- Low compression
sets
- Non-MbOCA
curatives may be successfully employed
Furthermore, MDI-based prepolymers
offer another significant benefit compared with conventional TDI-based
prepolymers: eliminating the concerns of TDI exposure in the workplace.
"Polyurethaneurea cast elastomers based on MDI chemistry are
now a reality," says Dr. Ashok Sarpeshkar, principal scientist,
Cast Elastomer Group, Specialty System Group for BMS. "For
the first time, with the introduction of the Baytec MAC prepolymer
product line, the hot-cast elastomer industry now has MDI-based
prepolymers that may be processed similar to TDI prepolymers using
the same equipment."
The Baytec MAC prepolymers
are currently available under Bayer's Desmodur® tradename, which
is globally recognized for state-of-the-art isocyanate chemistry.
Click on the grade names below to access the data sheet for each
product.
Click
here
to request more information about these amine-curable prepolymers,
including samples and sales.
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