Polyisoprene latex and preparation method thereof

The invention relates to the field of high polymer materials and preparation, and discloses polyisoprene latex and a preparation method thereof. The method comprises the following steps: (1) mixing polyisoprene dry glue with a nonionic emulsifier solution for pre-emulsification; and (2) sequentially premixing and emulsifying the mixture obtained in the step (1) and an anionic emulsifier. According to the method, the emulsifying capacity of the emulsifying agent can be exerted as much as possible, the viscosity of a latex mixture is reduced, the molecular weight loss of rubber is reduced, and the polyisoprene latex prepared by the method has relatively high mechanical property, relatively high mechanical stability and relatively good film-forming property. 本发明涉及高分子材料及制备领域，公开了一种聚异戊二烯胶乳及其制备方法。该方法包括：(1)将聚异戊二烯干胶与非离子乳化剂溶液混合进行预乳化；(2)将步骤(1)所得混合物与阴离子乳化剂依次进行预混和乳化。该方法可以尽可能发挥乳化剂的乳化能力，降低胶乳混合物的粘度，减少橡胶分子量损失，通过该方法制备得到的聚异戊二烯胶乳具有较高的力学性能、较高的机械稳定性和较好的成膜性能。