底涂剂对聚氨酯密封剂粘接性能的影响  

Influences of precoating on bonding properties of polyurethane sealant

作　　者：马玉春[1,2] 郑水蓉[1,2] 孙曼灵[1] 陈晓明[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072 [2]西北工业大学-华东理工大学高速铁路新材料联合研究所,陕西西安710129

出　　处：《中国胶粘剂》2012年第9期17-20,40,共5页China Adhesives

摘　　要：以异氰酸酯(TDI)和聚醚多元醇(如N-220、N-330和EP-330N等)为主要原料,合成了高性能双组分PU(聚氨酯)密封剂。采用不同底涂剂对水泥基材进行表面涂敷,以增强PU密封剂/水泥基材胶接件的粘接性能。结果表明:当D1[环氧树脂(EP)类底涂剂]作为PU密封剂/水泥基材胶接用底涂剂时,其粘接效果低于D2(PU类底涂剂);用硅烷偶联剂改性D1,可有效增强EP/PU间的界面结合力,提高PU密封剂/水泥基材胶接件的耐水性和耐热性;在D3(由EP、KH-550硅烷偶联剂和二乙烯三胺组成)未干时浇铸PU密封剂,则PU密封剂/水泥基材胶接件的性能满足JC/T 976—2005标准要求。With an isocyanate（TDI） and polyether polyols（such as N-220,N-330,and EP-330N） as main raw materials, a high-performance two-components PU （polyurethane） sealant was synthesized. The bonding properties of PU sealant/cement substrate-bonded samples could be increased by different precoating coated on cement substrate surface.The results showed that the bonding effect of PU sealant/cement substrate-bonded sample with D1 [epoxy resin （EP） type precoating] was lower than that with D2 （PU type precoating）. The D1 modified by silane coupler could effectively enhance EP/PU interface binding force,water-resistance and heat-resistance of PU sealant/cement substrate-bonded samples. The properties of PU sealant/cement substrate-bonded samples could meet standard requirement of JC/T 976--2005 when PU sealant was casted into un-dry D3,which was made from EP, KH-550 silane coupler and diethylenetriamine.

关 键 词：底涂剂 聚氨酯 密封剂 粘接强度 

分 类 号：TQ433.432[化学工程] TQ436.6