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Coating / Elastomer Type Classifications
Polyurea - A polyurea coating
/ elastomer is that derived from the reaction product of an isocyanate
component and a resin blend component. The isocyanate can be aromatic
or aliphatic in nature. It can be monomer, polymer, or any variant reaction
of isocyanates, quasi-prepolymer or a prepolymer. The prepolymer, or quasi-prepolymer,
can be made of an amine-terminated polymer resin, or a hydroxyl-terminated
polymer resin.
The resin blend must be made up of amine-terminated polymer resins, and/or
amine-terminated chain extenders. The amine-terminated polymer resins
will not have any intentional hydroxyl moieties. Any hydroxyls are the
result of incomplete conversion to the amine-terminated polymer resins.
The resin blend may also contain additives, or non-primary components.
These additives may contain hydroxyls, such as pre-dispersed pigments
in a polyol carrier. Normally, the resin blend will not contain a catalyst(s).
For reference purposes, a polyurethane /
polyurea hybrid coating/elastomer that is the reaction product
of an isocyanate component and a resin blend component. The isocyanate
can be aromatic or aliphatic in nature. It can be monomer, polymer, or
any variant reaction of isocyanates, quasi-prepolymer or a prepolymer.
The prepolymer, or quasi-prepolymer, can be made of an amine-terminated
polymer resin, or a hydroxyl-terminated polymer resin.
The resin blend may be made up of blends
of amine-terminated and/or hydroxyl-terminated polymer resins, and / or
amine-terminated and/or hydroxyl- terminated chain extenders. The resin
blend must contain blends of amine-terminated and hydroxyl-terminated
moieties. The resin blend may also contain additives, or non-primary components.
The resin blend may contain catalyst(s) for system reactivity.
For reference purposes, a polyurethane
coating / elastomer is that derived from the reaction product of an isocyanate
component and a resin blend component. The isocyanate can be aromatic
or aliphatic in nature. It can be monomer, polymer, or any variant reaction
of isocyanates, quasi-prepolymer or a prepolymer. The prepolymer, or quasi-prepolymer,
will be made of with a hydroxyl-terminated polymer resins.
The resin blend must be made up of hydroxyl-terminated
polymer resins, being diol, triol or multi-hydroxyl polyols, and/or aromatic
or aliphatic hydroxyl-terminated chain extenders. The resin blend may
also contain additives, or non-primary components. The resin blend will
contain catalyst(s) for system reactivity.
The above definition is published by the Polyurea Development Association
and is reprinted with their written permission.
The original document may be viewed at http://www.pda-online.org/meet/what.asp.
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