
第53卷第10期 2015年10月
上海涂料
SHANGHAI COATINGS
自制双组分聚氨酯弹性体涂料
施工工艺的研究
黄虹,陶业立,刘兰轩,刘秀生(武汉材料保护研所,湖北武汉430030)
Vol. 53 No. 10
Oct.2015
摘要:分别采用刮涂、浇注、缠绕三种施工工艺,将自制双组分聚氨酯弹性体涂料涂覆于45* 钢表面,检测不同施工工艺所得涂层的附着力、耐热盐水性、耐盐雾性和耐湿热性等性能。试验结果表明:自制弹性体涂料采用刮涂、浇注、缠绕三种施工工艺所得的涂层与钢材的附着力均达到 10MPa以上;分别经恒温40℃人工海水浸泡90d、耐中性盐雾试验2000h及耐湿热试验2000h后,钢材表面涂层均不起泡、不脱落、不开裂,且钢材表面无锈蚀。
关键调:双组分聚氨酯弹性体涂料;附着力:热盐水漫泡试验;耐盐雾试验;耐湿热试验
中图分类号:TQ630.7
0引言
文献标识码:A
聚氨酯弹性体是指分子主链上含大量氨基甲酸酯重复结构单元的聚合物,作为无溶剂弹性涂料的成膜物质应用越来越广泛1。聚氨酯弹性体涂料是一种快速固化成膜的双组分无溶剂涂料,常采用喷涂施工,两组分快速混合、喷出,快速固化成型,【收稿日期12015-07-23
【作者简介】黄虹,男,硕士研究生,研究方向为涂料涂装。
文章编号:1009-1696(2015)10-0021-03
涂层一次成膜厚度易控,涂层具有优异的耐蚀性及耐候性[2-3];但快速固化导致涂层对底材的润湿性差,层间附着力较低{4-51,在使用过程中会出现局部涂层脱落,失去对基材的保护作用。常用聚氨酯弹性体涂料的喷涂设备复杂,且不适合用于小面积涂层的修补。为此,本实验研制成混合适用期较长的聚氨酯弹性体涂料,可采用刮涂、浇注、缠绕等多种方式
StudyonthePerformanceofPolymerCementWaterproof CoatingswiththeFlyashasFiller Bian Linfang', Ren Yanting', Liu Yang',Wang Chen
(1.Shanxi BaotashanPaint Co.,Ltd.,ShanxiXingping,713100,China;2.GuangdongHuarunPaintCo.,Ltd. GuangdongFoshan,528306,China)
Abstract: The common fillers of JS waterproof coatings were heavy cacium powder and quartz powder which belong to the non-renewable resources. Using the flyash to replace quartz powder or heavy calcium powder, the influences of three kinds of filler with different mesh size on the tensile strength and elongation at break of coating were investigated. According to GB/T 23445—2009, the performance of JS waterproof coatings with the flyash as filler fully meet to the requirements.
Key Words: quartz powder; heavy calcium powder; flyash; elongation at break; tensile strength