P(IP-co-AN) adhesives for thermal infrared stealth was were prepared by emulsion polymerization with isoprene(IP) and acrylonitrile(AN) as comonomer,ethylene glycol dimethacrylate(EGDMA) as crosslinking monomer,sodium dodecyl sulfate(SDS) and polyoxyethylene octylphenol ether(TX-30) as surfactant and cumene hydroperoxide(CHP)-ferrous sulfate as redox initiator system.Structure and infrared emissivity of copolymer characterized by infrared spectroscopy (FT-IR),environmental scanning electron microspoic(ESEM) and infrared emissivity tester.Studied the infrared spectra of copolymer,compared the infrared absorption of the copolymer and the ternary polyethylene-co-propylene rubber (EPDM) at spectral range of 8~14 μm.Also studied the effect of the crosslinking monomer ratio on infrared absorption and emissivity of copolymer at spectral range of 8~14 μm.The results showed that P (IP-co-AN) adhesives at spectral range of 8~14 μm was infrared transparent,infrared emissivity was 0.82,and had some value in infrared stealth aspects.