High-functionality hydroxyl-terminated polybutadiene and preparation method thereof

• Main Authors: CHENG SHIHUA, ZHANG LIQUN, ZHAO YONGKAI, MAO LIXIN, QIN XUAN, FU SIWEI, LU JIANMIN
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

The invention discloses high-functionality hydroxyl-terminated polybutadiene and a preparation method thereof. The preparation method comprises the following steps: reacting butadiene with a short-chain initiator in a polar solvent at 30-50 DEG C for 3-5 hours, reducing the temperature to 5-10 DEG C, then adding a sodium dodecyl alcohol solution, reacting for 1-1.5 hours, then adding ethylene oxide, reacting for 2-4 hours at 0-10 DEG C, and finally acidifying to obtain hydroxyl-terminated polybutadiene, wherein the short-chain initiator is oligomerized isoprene dilithium which is initiated by two ends. The hydroxyl-terminated polybutadiene prepared by the invention has the advantages of uniform functionality, narrow molecular weight distribution and high functionality, the molecular weight distribution is between 1.05 and 1.15, and the functionality is 1.9 to 2.0. 本发明公开了一种高官能度端羟基聚丁二烯及其制备方法。所述制备方法包括以下步骤：在极性溶剂中将丁二烯与短链引发剂在30～50℃反应3～5小时，温度降至5～10℃，然后加入十二烷基醇钠溶液，反应1～1.5小时，然后加入环氧乙烷于0～10℃反应2～4小时，最后酸化得到端羟基聚丁二烯，其中所述短链引发