无溶剂型双组分耐黄变PU胶粘剂的制备与性能  

Preparation and performance of a solvent-free two-component anti-yellowing polyurethane adhesive

作　　者：李建庆[1] 柯勇[1] 郑友明[1] 何瑞红[1] 

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州545006

出　　处：《粘接》2013年第8期42-45,共4页Adhesion

基　　金：广西科技大学大学生创新基金

摘　　要：以六亚甲基二异氰酸酯(HDI)、聚醚多元醇(PPG)及3,3’-二氯-4,4’-二氨基二苯基甲烷(MOCA)为主要原料,采用2步法制备一种无溶剂型双组分耐黄变PU胶粘剂。通过傅立叶红外(FT-IR)和差热扫描(DSC)对其结构及性能进行分析。讨论了PPG、MOCA含量及双组分配比对PU胶粘剂性能的影响。结果表明,采用低分子质量的PPG能显著地降低胶粘剂的黏度,胶粘剂的固化速率随MOCA(交联剂)含量的增加而显著提高;固化后的胶粘剂具有良好的耐化学药品性、耐低温性和耐黄变性。通过DSC曲线确定了固化后胶膜的Tg为46.1℃。With hexamethylene diisocyanate （HDl）,polyether polyol （PPG） and 3,3＇ -dichloro-4,4＇ - diaminodiphenylmethane （MOCA） as main raw materials,a solvent-free two-component anti-yellowing polyurethane adhesive was synthesized by two-step method.The structure and performance of the polyurethane adhesive were characterized by FT-IR and DSC,and the influences of some factors （such as PPG,MOCA and weight ratio of A component to B component） on polyurethane adhesive properties were discussed.The results show that the PPG with low molecular weight can obviously decrease the viscosity of adhesive;the content of crosslinker is inversely proportional to the curing speed of adhesive.The chemical r 6 sistance,durable yellowing and low temperature resistance of the polyurethane adhesive that had cured are all great.The glass transition temperature （Tg） of cured adhesive film is 46. 1℃.

关 键 词：聚氨酯胶粘剂 无溶剂 双组分 耐黄变 

分 类 号：TQ433.432[化学工程]