Multilayer structures containing low viscosity polyurethane pottant compositions

Abstract

Multilayer compositions may include at least one first layer containing a thermoset resin; and a second layer emplaced on the at least one first layer and containing a reaction product of: an isocyanate component containing one or more isocyanate compounds; and an isocyanate-reactive component containing: one or more polyether polyols, one or more aliphatic polyols; and one or more hollow particles present in at least one of the isocyanate component, the isocyanate-reactive component, or a third component. Methods may include preparing a multilayer composition, including depositing at least one layer of a thermoset resin on a substrate; and disposing a second layer on the at least one layer of thermoset resin.

Dependencies are inferred from the claim text.