AS a heat-resistant modifier for ABS, PVC, PMMA resin and photographic materials, it can improve the heat resistance of the resin, certain mechanical properties (such as hardness, tensile strength, etc.), hot melt and processability. Adding 1% NPMI as copolymerization monomer in ABS, the heat distortion temperature of ABS resin can be increased by about 2 ℃. When 15% NPMI is added to ABS, the heat-resistant temperature of ABS resin can reach 125-135℃. Compared with similar products from Japan, our products have more excellent heat resistance.