Low-temperature low-shrinkage elastic natural rubber and preparation method thereof

The invention discloses low-temperature low-shrinkage elastic natural rubber and a preparation method thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: step 1, uniformly mixing natural rubber, butadiene rubber, an activating agent and a curing agent to prepare a rubber system; and 2, adding the low-shrinkage filler into the rubber system prepared in the step 2, uniformly mixing, and then extruding, vulcanizing and forming to prepare the low-temperature low-shrinkage elastic natural rubber finished product. Wherein the low-shrinkage filler is prepared by mixing polyurethane, sodium polyacrylate, a polymer dispersant, polyether glycol, nano titanium oxide powder and carbon black. The invention has the advantages of low shrinkage at low temperature, high elasticity and the like. 本发明公开了一种低温低收缩弹性天然橡胶及其制备方法，属于高分子材料技术领域，制备包括以下步骤：步骤一、将天然橡胶、顺丁橡胶、活化剂和固化剂混合均匀，制得橡胶体系；步骤二、将低收缩填料加入步骤二制得的橡胶体系中混合均匀，然后压出硫化成型制备得到低温低收缩弹性天然橡胶成品；其中，所述低收缩填料由聚氨酯、聚丙烯酸钠、聚合