Polyurea

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The general formula for polyureas. R represents a group of atoms and R' another group of atoms. The unit in brackets is repeated n times to give the polymer.

A polyurea is an elastomer created by the chemical reaction between an isocyanate and an amine.

The isocyanate can be monomer, polymer, or any variant reaction of isocyanates, quasi-prepolymer or a prepolymer. In industrial applications, a polyurea system often shares the same isocyanate as polyurethane systems; switching from a polyol to amine resin creates different chemical properties in the final form.

Polyurea resin is comprised of polyether-amines or an amine terminated polyol. This polymer is very reactive and does not require a catalyst. This results in the relatively short set-up time associated with polyureas, one of the major strong points it has in use.