Polyurethane composition with stable heat-conducting property as well as preparation method and application thereof

The invention relates to a polyurethane composition with stable heat-conducting property as well as a preparation method and application thereof. The polyurethane composition comprises a component A and a component B, the component A comprises the following components: polyether glycol, hydroxyl-terminated polyacrylate glycol, hyperbranched polyester polyol, a modified heat-conducting filler, a plasticizer and a catalyst; the component B comprises the following components: isocyanate, a modified heat-conducting filler and a plasticizer. On the basis that polyether glycol and isocyanate are added into the polyurethane composition, hydroxyl-terminated polyacrylate glycol, hyperbranched polyester polyol and modified heat-conducting filler are further added, through cooperation of the components, the polyurethane composition has good heat-conducting property and adhesive property, and after high-temperature treatment, the heat-conducting property of the polyurethane composition is greatly improved. Good heat-cond