海洋环境下混凝土结构用弹性氟碳涂料的研制
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摘要
采用优质弹性氟树脂作为基料,耐候型柔性异氰酸酯为固化剂,辅以适合的颜填料、溶剂、助剂等,经过配方优化设计,研制了一种海洋环境下混凝土结构用弹性氟碳涂料。重点探讨了不同固化剂、不同R值(—NCO/—OH物质的量比)、分散剂等对弹性氟碳涂料性能的影响。优化后的弹性氟碳涂料的拉伸强度为12. 59 MPa,断裂伸长率为200%,经5 000 h人工老化后,漆膜不粉化,不开裂,保光率高达87%。试验结果表明:所制备的产品既具有氟碳涂料优异的耐候性、防腐性能,同时又具有弹性涂料的高延伸率和抗开裂性,较好地解决了目前混凝土结构用防护涂料耐老化性能不足、抗开裂性较差的难题。
A flexible fluorocarbon coating for concrete structures in the marine environment is developed by using the high quality elastic fluorine resin as the binder,the weatherproof flexible isocyanate as the curing agent in addition to the suitable pigments,fillers and additives,etc. The effects of different curing agents,different R value( mol ratio of NCO/OH)and dispersant on the performance of the fluorocarbon coatings are discussed. The tensile strength of the optimized elastic fluorocarbon coating is 12. 59 MPa,the elongation at break is200%. After 5 000 h artificial aging,the film shows no chalking and cracking,and the gloss retention rate is up to 87%. The test results show that the prepared products have excellent weatherability and anticorrosion properties,and also have high elongation and crack resistance of the elastic coatings. It is a good solution to the problems of poor aging resistance and poor cracking resistance of the protective coatings for concrete structures.
A flexible fluorocarbon coating for concrete structures in the marine environment is developed by using the high quality elastic fluorine resin as the binder,the weatherproof flexible isocyanate as the curing agent in addition to the suitable pigments,fillers and additives,etc. The effects of different curing agents,different R value( mol ratio of NCO/OH)and dispersant on the performance of the fluorocarbon coatings are discussed. The tensile strength of the optimized elastic fluorocarbon coating is 12. 59 MPa,the elongation at break is200%. After 5 000 h artificial aging,the film shows no chalking and cracking,and the gloss retention rate is up to 87%. The test results show that the prepared products have excellent weatherability and anticorrosion properties,and also have high elongation and crack resistance of the elastic coatings. It is a good solution to the problems of poor aging resistance and poor cracking resistance of the protective coatings for concrete structures.
引文
[1]祝和权,杜存山,李海燕,等.铁道科学技术新进展:铁道科学研究院55周年论文集[C].北京:中国铁道出版社,2005:800-806.
[2]侯保荣.海洋钢结构浪花飞溅区腐蚀控制技术[M].北京:科学出版社,2011:1-2.
[3]孙宏刚.海洋混凝土结构防护涂层性能研究[D].青岛:青岛理工大学,2018.
[4]刘国杰.氟碳弹性体涂料的进展[J].上海涂料,2005,43(Z1):9-13.
[5]李志高.青岛海湾大桥混凝土防护用新型聚脲材料性能研究[D].青岛:青岛理工大学,2010.
[6]倪玉德.FEVE氟碳树脂与氟碳涂料[M].北京:化学工业出版社,2006:71.
[7]刘长亮,曹亚成,朱东,等.分散助剂在大金GK系四氟树脂涂料中的应用[J].涂料工业,2009,39(5):69-72.
[8]王健,曾凡辉,刘含茂.氟碳涂料分散性能的研究[J].中国涂料,2011,26(2):21-23.
[2]侯保荣.海洋钢结构浪花飞溅区腐蚀控制技术[M].北京:科学出版社,2011:1-2.
[3]孙宏刚.海洋混凝土结构防护涂层性能研究[D].青岛:青岛理工大学,2018.
[4]刘国杰.氟碳弹性体涂料的进展[J].上海涂料,2005,43(Z1):9-13.
[5]李志高.青岛海湾大桥混凝土防护用新型聚脲材料性能研究[D].青岛:青岛理工大学,2010.
[6]倪玉德.FEVE氟碳树脂与氟碳涂料[M].北京:化学工业出版社,2006:71.
[7]刘长亮,曹亚成,朱东,等.分散助剂在大金GK系四氟树脂涂料中的应用[J].涂料工业,2009,39(5):69-72.
[8]王健,曾凡辉,刘含茂.氟碳涂料分散性能的研究[J].中国涂料,2011,26(2):21-23.