▎ 摘　　要

NOVELTY - Graphene chemically modified rigid polyurethane foam comprises polyisocyanate, polymer polyhydric alcohols, chain extender, catalyst, flame retardant, and foaming agent. The polymer polyhydric alcohol comprises chemically connected graphene and polyether polyhydric alcohol. USE - Graphene chemically modified rigid polyurethane foam used for building insulation material (claimed). ADVANTAGE - The product has excellent flame retardant property, and low smoke release rate, and improves survival chances of fire trapped personnel. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of modified rigid polyurethane foam comprising preparing chemically connected graphene and polyether polyhydric alcohol; uniformly mixing components except polyisocyanate; adding polyisocyanate; pouring into mold, and curing.