羟基锡酸锌包覆硫酸钡的制备以及在软PVC中的阻燃应用  

Preparation of Zinc Hydroxystannate-Coated Barium Sulfate and Its Application as Flame Retardant for Flexible PVC

作　　者：王海[1] 王春征[2] 刘彩红[2] 屈红强[2] 

机构地区：[1]国家知识产权局专利局专利审查协作北京中心,北京100044 [2]河北大学化学与环境科学学院,河北保定071002

出　　处：《塑料》2013年第3期20-23,40,共5页Plastics

摘　　要：通过均匀沉淀法制备了羟基锡酸锌包覆硫酸钡(ZHSCB)样品,并与硫酸钡(BaSO4)对比应用于软PVC的阻燃消烟处理。利用X-射线衍射(XRD)及扫描电子显微镜(SEM)等手段对ZHSCB进行了表征,并通过极限氧指数(LOI)和烟密度等级(SDR测试)研究了ZHSCB对PVC的阻燃消烟作用。通过热分析的方法研究了阻燃PVC从室温到800℃的热降解过程。通过拉伸强度和断裂伸长率测定了ZHSCB对PVC的力学性能的影响。结果表明:ZHSCB对PVC有优异的阻燃消烟作用,能够有效促进PVC第一降解阶段的脱HCl反应,促进交联成炭反应的进行以及剩炭稳定性的提高,并且对于PVC的力学性能影响较小。The Zinc hydroxystannate-coated barium sulfate was prepared by homogeneous precipitation method and it was used as flame retardant and smoke suppression for flexible PVC compare with barium sulfate also. The product was characterized by using x-ray diffraction （XRD） and scanning electron microscopy （SEM） ,The flame retardancy and smoke suppression of ZHSCB-treated PVC was studied by limiting oxygen index （LOI） and smoke density rating （SDR） test. The thermal degradation process from room temperature to 800 ℃ of PVC samples was studied by thermal analysis method. The mechanical properties of the PVC samples were studied by tensile strength and elongation at break test. The results showed that ZHSCB could be used as an effective flame retardant and smoke suppression for PVC, could effectively promote the dehydroehlorination reaction and the crosslinking reaction in the first degradation stage ,also improve the stability of residue char in the second stage of PVC,and had little effect on the mechanical properties of PVC.

关 键 词：羟基锡酸锌 包覆 硫酸钡 阻燃 消烟 

分 类 号：TQ314.248[化学工程—高聚物工业]