▎ 摘　　要

NOVELTY - Composite wave absorbing coating comprises wave absorbing agent and coating. The wave absorbing agent comprises multi-component nano-composite material. The coating adopts a single-component polyurethane interface agent. The weight ratio of the multi-component nanocomposite to single-component polyurethane interface agent is 4:1. USE - The coating is useful in field with wide frequency band and strong wave-absorbing ability of radar wave-2-18 GHz frequency range. ADVANTAGE - The coating solves the problem that the traditional wave-absorbing coating has large density, narrow wave-absorbing frequency band, bad mechanical property, and it is suitable for industrial large-scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite wave absorbing coating, comprising (i) preparing graphene oxide; (ii) preparing polypyrrole; (iii) preparing carbonyl iron nanoparticles; (iv) preparing graphene-supported polypyrrole nanocomposite; (v) preparing a single-component polyurethane interface agent; (vi) mechanically mixing and stirring the preparation steps; (vii) adding the preparation of step (v) to step (vi), and magnetically mixing and stirring.