Polyurea coating compositions

Abstract

A polyurea coating layer is provided, which is the reaction product of an isocyanate composition and an amine composition. The isocyanate composition comprises isocyanate functional compounds selected from a first set of isocyanate compounds having an average isocyanate functionality of at least about 3 and having an equivalent weight of from about 180 to about 240. The first set of isocyanate compounds preferably are at least about 65% of the isocyanate compounds. The isocyanate composition has an average isocyanate functionality of at least about 2.5. The amine composition comprises amine functional compounds selected from a first set of secondary amine compounds having an equivalent weight of from about 200 to about 280 (preferably as about 50 to about 80% of the amine compounds), and a second set of secondary amine compounds having an equivalent weight of from about 30 to about 180 (preferably as about 20 to about 40% of the amine compounds). The amine composition has an average amine functionality of about 1.5 to about 2.5. The reactants are reacted under conditions such that the coating layer has a Hardness Value of at least about 70 D. Methods of making the coating layer, kits for manufacture of coating layers, methods for making products incorporating coatings of the present invention, and products comprising coatings of the present invention are also provided.

Dependencies are inferred from the claim text.