Polyurea-based adhesives, articles therefrom, and methods of their preparation and use

摘要

Adhesive compositions of the invention are useful as pressure-sensitive-adhesives and heat-activatable adhesives. Advantageously, adhesive compositions of the invention comprise polymers that are polyurea-based. Adhesive compositions of the invention are useful in a wide variety of applications, including adhesive tapes. One method of preparing such adhesive compositions includes providing at least one polyisocyanate; providing at least one polyamine; reacting the at least one polyisocyanate with the at least polyamine to form the polyurea-based polymer; and optionally adding a tackifier to the polyurea-based polymer.