某型导弹表面漆层发生了变色。通过模拟试验、光泽度测试及化学成分定量分析等方法，对漆层变色的原因进行了分析。结果表明：导弹包装箱所用的丁腈橡胶垫块在一定压力下与导弹漆层接触时，邻苯二甲酸二丁酯和N-苯基-1萘胺从橡胶垫块中渗出，对漆层产生污染，导致漆层变色和光泽度下降；增加水分后试样的污染程度和光泽度下降幅度更大，说明橡胶与漆层紧密接触时，橡胶中的水分子也会渗入漆层表面。更换新型硅橡胶垫块后，漆层未再受污染，光泽度也基本无变化。

The surface paint color of a missile changed. Through the simulation test, glossiness test and chemical components quantitative analysis, the reason of paint discoloration was analyzed. The results show that when the nitrile butadiene rubber pad used in the missile packaging box contacted with the missile paint under certain pressure, dibutyl phthalate and N-phenyl-1-naphthylamine were exuded from the rubber pad, which polluted the paint layer, and resulted in the paint layer discoloration and glossiness reduction; when the moisture content was increased, the pollution degree and glossiness of the sample decreased more, which showed that when the rubber contacted with the paint layer closely, water molecules in the rubber infiltrated the paint surface. After replacing the new silicone rubber pad, the paint layer was not polluted, and the glossiness of the paint layer basically remained unchanged.