Polyurethane-based adhesives, systems for such adhesives, articles therefrom, and methods of making

摘要

Polyurethane-based adhesives of the invention comprise the reaction product of: an isocyanate-reactive component comprising at least two isocyanate-reactive materials, the at least two isocyanate-reactive materials comprising a first isocyanate-reactive material having a weight average molecular weight of less than 2,000 and a second isocyanate-reactive material having a weight average molecular weight of 2,000 or more; an isocyanate-functional component; an optional reactive emulsifying compound; and an optional chain extending agent. The adhesives, which are preferably pressure-sensitive adhesives, can be prepared from 100% solids, waterborne or solventborne systems.