蓖麻油基多元醇改性聚氨酯胶黏剂的研究

Study of Polyurethane Adhesives Made from Modified Castor-oil-based Polyols

以绿色可再生的蓖麻油(CO)和甘油为原料进行酯交换,然后将其产物(P-CO)与六氢苯酐(HHPA)进行酯化反应制备了蓖麻油基多元醇(P-HHPA-CO),将P-HHPA-CO和甘油代替传统的石油类多元醇,与异氟尔酮二异氰酸酯(IPDI)在无催化剂条件下合成了环保型脂肪族聚氨酯胶黏剂,并对不同NCO/OH摩尔比制备的聚氨酯胶黏剂涂膜进行了热重分析、差示扫描量热分析、拉伸力学性能测试、剥离及剪切强度测试。结果表明,制得的P-HHPACO羟值为219mg KOH/g;当摩尔比为1.3时,聚氨酯胶黏剂涂膜的T剥离强度达到399.2N/m;摩尔比为1.5时,剪切强度达到7.1N/mm2。

The renewable green castor oil （CO） and glycerol Were used as raw materials for transesterification, then the product （P-CO） was esterified with hexahydrophthalie anhydride （HHPA） leading to a castor-oil-based polyols （P-HHPA-CO）. Subsequently, environmentally-friendly wrapping polyurethane adhesives were made from P-HHPA-CO, renewable glycerin and isophorone diisoeyanate （IPDI）, no traditional petroleum polyols and organic tin catalyst were used. TG, DSC, tensile mechanical properties test, PE/BOPP composite membrane peel strength test and shear strength test were carried out for the polyurethane adhesives, film with different NCO/OH ratios. When the R values was 1.3 - 1.5, the polyurethane adhesives modified by PHHPA-CO acquired the best mechanical and adhesive properties.