▎ 摘　　要

NOVELTY - Polyurethane absorbing coating comprises graphene as absorbing agent, which is uniformly dispersed in an aqueous polyurethane by chemical bonding. USE - Polyurethane absorbing coating used in fabric finishing for protective clothing for special occasions (claimed). ADVANTAGE - The polyurethane absorbing coating is light and soft, has good flexibility and shape adaptability, can be cut into a shielding layer of radar or electronic equipment, and broad application prospects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing polyurethane absorbing coating, which involves: (A) surface-modifying graphene oxide with a silane coupling agent; (B) reducing with a reducing agent to obtain a graphene dispersion; (C) mixing isophorone diisocyanate, polyethylene glycol PEG400 and dibutyltin dilaurate in a mass ratio of 10-20:10-20:0.05-0.1 with a solvent with stirring under nitrogen; (D) reacting polyurethane prepolymer, chain extender and graphene dispersion continuously to carry out capping reaction; and (E) adding alkali neutralization reaction to obtain graphene or waterborne polyurethane absorbing coating.