苯丙/环氧改性丙烯酸水性防锈涂料的制备与表征
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摘要
为了改善传统水性防锈涂料防锈周期短、抗闪锈性差等问题,以自制苯丙乳液与自制环氧改性丙烯酸乳液复配作为成膜物质,改性氧化锌、三聚磷酸铝、沉淀硫酸钡为防锈颜料,滑石粉、重质碳酸钙、云母为惰性填料,加入助剂制备水性防锈涂料。以涂膜的表干时间、附着力、抗冲击性、铅笔硬度及耐水时间为指标,考察了不同的乳液配比对涂膜的影响;设计正交试验,考察了改性氧化锌、三聚磷酸铝、沉淀硫酸钡的用量对涂膜耐盐雾性的影响。经过试验配方不断优化得到最佳的涂料配方为自制苯丙乳液为21.7 g、自制环氧改性丙烯酸乳液为7.3 g、去离子水为19.0 g、改性氧化锌15.0 g、三聚磷酸铝8.0 g、沉淀硫酸钡8.0 g、云母粉4.0 g、滑石粉为2.0 g、重质碳酸钙为12.0g,制得的涂膜可实现对钢铁的长效防锈。在涂层厚度为48～52μm时,耐盐雾极限为25 d、耐水极限为32 d。
In order to improve the short anti-rust period and the poor anti-flash-rust of the traditional water-based anti-rust coating,the water-based anti-rust coating was prepared with self-madestyrene-acrylic emulsion and self-made epoxy modified acrylic emulsion as film-forming substance,and modified zinc oxide,aluminum tripolyphosphate and precipitated barium sulfate as anti-rust fillers,as well as talc,heavy calcium and mica as inert fillers. The effects of different emulsion ratios on the coating film were investigated by evaluation of the dry time,adhesion,impact resistance,pencil hardness and water resistance time of the coating film. An orthogonal test was designed to examine the effects of modified zinc oxide,aluminum tripolyphosphate,and precipitated barium sulfate on the salt spray resistance of the coating. After a large number of experiments,the formula was optimized. Results showed that the obtained best preparation conditions were as follows: self-made styrene-acrylic emulsion 21.7 g,self-made epoxy modified acrylic emulsion 7.3 g,deionized water 19.0 g,modified zinc oxide 15.0 g,aluminum tripolyphosphate 8.0 g,precipitated barium sulfate 8.0 g,mica 4.0 g,talc 2.0 g,heavy calcium 12.0 g. The prepared coating film achieved long-term rust prevention of steel. When the thickness of the coating was 48-52 μm,the salt tolerance limittime was 25 d and the water tolerance limit time was 32 d.
In order to improve the short anti-rust period and the poor anti-flash-rust of the traditional water-based anti-rust coating,the water-based anti-rust coating was prepared with self-madestyrene-acrylic emulsion and self-made epoxy modified acrylic emulsion as film-forming substance,and modified zinc oxide,aluminum tripolyphosphate and precipitated barium sulfate as anti-rust fillers,as well as talc,heavy calcium and mica as inert fillers. The effects of different emulsion ratios on the coating film were investigated by evaluation of the dry time,adhesion,impact resistance,pencil hardness and water resistance time of the coating film. An orthogonal test was designed to examine the effects of modified zinc oxide,aluminum tripolyphosphate,and precipitated barium sulfate on the salt spray resistance of the coating. After a large number of experiments,the formula was optimized. Results showed that the obtained best preparation conditions were as follows: self-made styrene-acrylic emulsion 21.7 g,self-made epoxy modified acrylic emulsion 7.3 g,deionized water 19.0 g,modified zinc oxide 15.0 g,aluminum tripolyphosphate 8.0 g,precipitated barium sulfate 8.0 g,mica 4.0 g,talc 2.0 g,heavy calcium 12.0 g. The prepared coating film achieved long-term rust prevention of steel. When the thickness of the coating was 48-52 μm,the salt tolerance limittime was 25 d and the water tolerance limit time was 32 d.
引文
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[2]邵水源,宋昌清,王舒婷,等.水基切割液防锈剂的复配及其防锈效果[J].材料保护,2012,45(4):67-69.
[3]刘卫峰,赵其中.快干型水性丙烯酸改性环氧酯防锈底漆的研制[J].上海涂料,2015,53(5):3-4.
[4]张海凤,高延敏,曹霞,等.改性纳米氧化锌对丙烯酸聚氨酯涂层防腐性能的影响[J].电镀与涂饰,2010,29(2):54-55.
[5]蔡芸.高性能防锈颜料三聚磷酸铝[J].中国涂料,2007,22(5):19-20.
[2]邵水源,宋昌清,王舒婷,等.水基切割液防锈剂的复配及其防锈效果[J].材料保护,2012,45(4):67-69.
[3]刘卫峰,赵其中.快干型水性丙烯酸改性环氧酯防锈底漆的研制[J].上海涂料,2015,53(5):3-4.
[4]张海凤,高延敏,曹霞,等.改性纳米氧化锌对丙烯酸聚氨酯涂层防腐性能的影响[J].电镀与涂饰,2010,29(2):54-55.
[5]蔡芸.高性能防锈颜料三聚磷酸铝[J].中国涂料,2007,22(5):19-20.