PRIMER COMPOSITIONS FOR IMPROVED ADHESION OF POLYMER SHEETS

摘要

Primer compositions for adhering two sheets of polymer material to one another are provided. The primer compositions include polyurethanes that are the reaction product of an isocyanate, and at least one of a polyol, a chain extender, and a diamine. The polyurethanes may include pure polyurethanes, or commercially available varieties that may include other additives. The premier compositions are well-suited for adhering polycarbonate and polyurethane sheets together for use in transparent armor applications, as they help to ensure a very strong bond between the two sheets, and resist delamination.

主权项

1. A primer composition, comprising:
a polyurethane, wherein said polyurethane is a reaction product of an isocyanate and at least one additional component selected from the group consisting of a polyol, a chain extender having two hydroxyl groups, and a diamine; and a solvent, wherein said polyurethane is present in the primer composition in an amount of 1.6 to 24 grams per liter of solvent.