▎ 摘　　要

NOVELTY - Composition comprises 20-50 wt.% polyol, 10-30 wt.% isocyanate-based curing agent, 1-2.5 wt.% reduced graphene oxide, and 20-50 wt.% pigment. USE - The composition is useful in damping material for ship sonar dome (claimed) for military purpose. ADVANTAGE - The composition has excellent damping performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for damping material comprising 100 pts. wt. rigid polyurethane base material formed by reaction of polyol having a glass transition temperature of -40 degrees C or more and isocyanate-based curing agent; 1-2.5 pts. wt. reduced graphene oxide combined with the rigid polyurethane substrate, and 20-50 pts. wt. pigment.