Combination of heat conducting materials softend at low temperature, preparation method and application

A heat-conducting composite rubber able to be softened at 38-65 deg.C is prepared through proportionally mixing liquid-state acrylonitrile rubber with vinyl polyacetate, and adding heat-conducting agent chosen from alumina, zinc oxide, aluminium nitride, etc. It can be made into film or heat-conducting sheet, or for filling it in seam of electronic package or heat radiator. 本发明涉及一种低温软化导热胶材组合物及其制备方法和应用，用分子量300～100000的液态丙烯腈橡胶与聚醋酸乙烯混合，制成软化温度38～65℃的胶材，添加适量的导热剂，如氧化铝、氧化锌、氮化铝，氮化硼、石墨、金属粉或纳米粘土等制成次微米或纳米粉末导热剂，可制成薄膜厚度在0.01～5mm之间，热传导系数在0.5～5W/m-K之间，热阻抗值在0.005～0.2℃m#+[2]/W之间的导热片，且其软化温度范围在38～65℃，可避免存放及运送中液化，用于电子组件与散热器填缝热传导接口，以提高热传导效率。