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Monomeric isocyanates for the production of prepolymers
Desmodur® and Mondur® isocyanates, when combined with Acclaim®,
Arcol® and Multranol® polyether polyols or Desmophen®
polyester polyols, form prepolymers for one- and two-component adhesives
and specialties. Desmodur® I and W and Mondur® M and TD are the
isocyanates typically used to manufacture prepolymers for solvent-free
adhesives and specialties applications.
Properties: Depending on the type of polyol chosen,
products can be designed to yield the softest elastomeric sealant
or the toughest, most durable adhesive. One-component moisture-curing
materials react with atmospheric moisture to give urea structures
that exhibit high-strength bonds and good heat resistance. Two-component
materials form urethane groups that give high strength, heat resistance
and faster cure times. Aromatic isocyanate-based prepolymers have
high reactivity, good structural strength and a tendency for discoloration
from exposure to light. Aliphatic isocyanate-based prepolymers are
characterized by slower reactivity and discoloration resistance
compared to aromatic prepolymers.
Uses:
In the transportation industry, monomeric diisocyanates are the
building blocks of choice for sandwich panel applications.
Advantages:
- outstanding cohesion and adhesion
- very good heat resistance
- resistance to solvents, plasticizers and grease
- rapid crosslinking
Contact us and our technical
experts will be pleased to give detailed advice on specific applications
of Bayer products in the transportation industry.
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