废聚酯醇解制备聚氨酯胶粘剂的研究  

Study on preparing polyurethane adhesive with alcoholysis waste PET as main raw material

作　　者：胡孝勇[1] 张泽民[1] 朱文强[1] 彭启兵 

机构地区：[1]广西工学院生物与化学工程系,广西柳州545006 [2]江门新时代合成材料有限公司,广东江门529040

出　　处：《中国胶粘剂》2011年第1期49-52,共4页China Adhesives

摘　　要：以聚醚多元醇(PPG)和4,4′-二苯基甲烷二异氰酸酯(MDI-100LL)为原料制备了含有-NCO的聚氨酯(PU)胶粘剂的A组分,将废聚酯(PET)通过醇解、酯化和缩聚等步骤制得含有-OH的PU胶粘剂的B组分,讨论了反应条件对A组分和B组分性能的影响。结果表明:制备A组分时,反应温度80℃,反应时间3 h;制备B组分时,废PET醇解温度195～210℃(反应时间3.5 h),酯化温度140～150℃(反应时间60 min),缩聚温度190～210℃(反应时间30 min)。调节双组分的配比,可以制备出满足不同施工要求的胶粘剂,当n(A组分)∶n(B组分)=1.30∶1时,胶粘剂的粘接效果最佳;固化后PU胶膜的玻璃化转变温度(Tg)达到-31℃。The component A containing -NCO in polyurethane（PU） adhesive was synthesized with polyether polyol（PPG） and 4,4＇-diphenylmethane diisocyanate（MDI-100LL） as raw materials. The component B containing -OH in PU adhesive was prepared by alcoholysis,esterification and polycondensation of waste PET（polyethylene terephthalate）. The PU adhesive was prepared by mixing component A and B. The influences of reaction conditions on properties of component A and B were discussed. The results showed that the preparing condition of component A was polymerization at 80℃ for 3 h. The preparing conditions of component B were waste PET aleoholysis at 195-210℃ for 3.5 h,waste PET esterification at 140-150℃ for 60 min,waste PET polycondensation at 190-210℃ for 30 rain. The PU adhesives,which was made by adjusting molar ratio of n （A component）：n （B component）,can meet requirements of different operation. The PU adhesives had optimal bonding effect when molar ratio of n （A eomponent）：n（B component） was 1.30：1,its glass transition temperature was -31℃.

关 键 词：废聚酯 聚氨酯 胶粘剂 醇解 

分 类 号：TQ433.432[化学工程]