PDF (1810K)
摘要
以氢氧化高钴[Co(OH)3]和Ca(OH)2为原料混合形成Co/Ca复合催干体系,制备水性醇酸树脂防腐涂料。结果表明:该涂料的表干时间小于8h,实干时间小于24h,挥发性有机物含量(VOC)较低,小于37g/L,远低于标准300g/L的要求,耐水性及耐盐水性好,工程应用效果理想;机理分析表明,当用氨水调节pH为8.5左右时,Co3+和氨水形成Co3+(NH3)6络合物,在涂膜形成后,氨水挥发,Co3+被释放,与水性醇酸树脂中的脂肪酸根阴离子基团(Ln-)结合,发生催干反应,形成ConL3缔合物;Ca(OH)2中的OH-生成水,在涂膜干燥过程中挥发离去,Ca2+与Ln-形成CanL2缔合物,从而起到对水性醇酸树脂的辅助催干。
Abstract
A waterborne alkyd resin anticorrosive coating was prepared by Co/Ca composite drying system,which formed by Co(OH)3 and Ca(OH)2.The results showed that the surface drying time of the coating was less than 8h,and the dry time of that was less than 24h.The Volatile Organic Content (VOC) was low,which was only 37g/L and far below the standard requirements of 300g/L.Its water resistance and salt water resistance was good,and the effect of engineering application was ideal.The mechanism analysis showed that when the pH was about 8.5 adjusted by ammonia water,there was a Co3+(NH3)6 complex that formed by Co3+ and ammonia.After the coating film formed,the ammonia was volatilized and Co3+ was released.Co3+ was combined with the fatty acid anion group (Ln-) in the waterborne alkyd resin to cause a reaction and form a ConL3 associate.In Ca(OH)2 solution,the OH- formed water that evaporated and left during the drying process of the coating film.Ca2+ was combined with Ln- to form a CanL2 associate to act as an auxiliary drying of the waterborne alkyd resin.
关键词
Co
/
Ca
/
催干剂
/
水性醇酸树脂防腐涂料
/
制备
Key words
Co
/
Ca
/
drier
/
waterborne alkyd resin anticorrosive coating
/
preparation
一种Co/Ca复合催干水性醇酸树脂防腐涂料的制备[J].
化工新型材料, 2020, 48(1): 266-269 DOI:
[1] 李自军.聚苯胺的合成及其在水性醇酸树脂防腐涂料中防腐性能研究[D].西安:长安大学,2018.
[2] 谢海,孟庆泉.水性醇酸防腐涂料改性研究进展[J].涂层与防护,2018,39(3):49-52.
[3] 李至秦,魏金伯,康瑞瑞,等.改性水性醇酸防腐涂料的研制与研究[J].涂料技术与文摘,2017,38(11):22-26.
[4] 彭伏德.有机硅丙烯酸酯聚氨酯改性水性醇酸防腐涂料的制备及性能[J].上海涂料,2017,55(5):16-20.
[5] 王明晶,李永文,张新宇,等.水性丙烯酸改性醇酸防腐涂料的研制[J].中国涂料,2017,32(3):57-60.
[6] 伍剑辉,彭辉云,石成芬.催干剂对水性醇酸树脂涂料性能的影响[J].中国涂料,2008,23(9):24-27.
[7] 丁奋.水性醇酸树脂用催干剂的制备与性能研究[D].上海:华东理工大学,2014.
[8] 张素英.稀土催干剂及其应用[J].辽宁化工,1991(2):25-27.
[9] 关地.不粘性钴催干剂的制备与应用[J].化工时刊,1993(12):19-20.
[10] 姚伯龙,钮晓彬.复合催干剂的研制[J].江南学院学报,2001,16(2):5-9.
[11] 王赓.绿色建材——现代建筑材料的环保性分析[J].科技致富向导,2010(33):22.
[12] 国家标准总局.GB/T 1728—1979漆膜、腻子膜干燥时间测定法[S].北京:中国标准出版社,1979:509-510.
[13] 国家标准总局.HG/T 4847—2015水性醇酸树脂涂料[S].北京:中国标准出版社,2015:1-5.
[14] 国家技术监督局.GB/T 1733—1993漆膜耐水性测定法[S].北京:中国标准出版社,1993:422-423.
[15] 国家标准总局.GB/T 9274—1988色漆和清漆耐液体介质的测定[S].北京:中国标准出版社,1988:476-479.
[16] Bieleman J.Additives for coatings[J].Jct Coatings Tech,2008,4(4):40-46.
[17] Athawale V D,Chamanker A V.The effects of driers on film properties of alkyd resin[J].Pigment & Resin Technology,1997,26(6):378-381.
[18] Mallégol J,Barry A M,Ciampi E,et al.Influence of drier combination on through-drying in waterborne alkyd emulsion coatings observed with magnetic resonance profiling[J].Journal of Coatings Technology,2002,74(933):113-124.
基金资助
王姚(1995-),女,硕士研究生,主要研究方向为环保涂料制备与应用。
