挠性覆铜板用无卤阻燃胶粘剂的研制

Development of halogen-free flame-retardant adhesive for flexible copper clad laminates

采用端羧基丁腈橡胶对环氧树脂增韧改性,以4,4′-二氨基二苯砜为固化剂、1-氰乙基-2-乙基-4-甲基咪唑为固化促进剂,运用磷阻燃机制和成碳阻燃技术,研制出一种挠性覆铜板用无卤阻燃胶粘剂。利用DSC、TGA分别表征胶粘剂的固化反应性和成碳率,探讨了胶粘剂的增韧、固化和阻燃机理。试验结果表明,该无卤阻燃环氧阻燃胶粘剂具有优良的柔软性、粘接性、耐热性和阻燃性,适用于制作挠性覆铜板。

In this paper,a halogen-free flame-retardant adhesive for the flexible copper clad laminates （FCCL） was prepared by using the flame-retardant mechanism of phosphorus and the flame-retardant technology due to char formation,and the epoxy resin was toughened with carboxyl terminated butadiene acrylonitrile rubber （CTBN）,and using 4,4＇-diamino diphenyl sulfone （4,4＇ -DDS） as the curing agent and 1-cyanoethyl-2-ethyl-4-methylimidazole （2E4MZ- CN） as the curing accelerant.The curing reactivity and char yield of the adhesive were characterized by differential scanning calorimetry （DSC） and thermogravimetry analysis （TGA）.The mechanism of toughening,curing and flame-retarding of the halogen-free flame-retardant adhesive were investigated.The experimental results show that the halogen-free flame- retardant adhesive has excellent flexibility,adhesive properties,heat resistance and flame retardancy,and so that it is suitable to make the flexible copper clad laminates.