CN107163786A - 一种导热性良好的无铬达克罗涂料及其制备方法 - Google Patents

一种导热性良好的无铬达克罗涂料及其制备方法 Download PDF

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CN107163786A
CN107163786A CN201710551807.8A CN201710551807A CN107163786A CN 107163786 A CN107163786 A CN 107163786A CN 201710551807 A CN201710551807 A CN 201710551807A CN 107163786 A CN107163786 A CN 107163786A
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宋睿
王贵东
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Abstract

本发明公开了一种导热性良好的无铬达克罗涂料及其制备方法，其特征在于，是由以下重量份的原料制得：铜粉2‑3，刚玉粉 3‑5，碳化硅4‑8，镁粉1‑2，聚四氟乙烯粉 5‑10，环氧树脂E42 10‑15，乙烯基三胺10‑15，Fe2O31‑3，锌粉20‑30，铝粉20‑30，硅烷偶联剂KH550 40‑50，乙醇5‑10，丙酮50‑70，聚二甲基硅氧烷0.3‑0.6；本发明具有较高的强度和耐磨性，表现出良好的流动性和附着性，形成的涂层致密光滑，解决了达克罗涂液强度较小、耐磨性不好的缺点，极具市场竞争力；配合添加的铜粉增加了涂料的导热性和导电率。

Description

一种导热性良好的无铬达克罗涂料及其制备方法
技术领域
本发明涉及一种达克罗涂料，属于金属防腐领域，具体涉及一种导热性良好的无铬达克罗涂料及其制备方法。
背景技术
钢铁腐蚀每年都会直接导致大量的事故或形成事故隐患，造成巨大的经济损失，严重影响国家经济发展和安全。如何能提供持久的耐腐蚀性力也就成为了研究的热点。达克罗涂料是一种以鳞片状锌粉、铝粉铬酐和有机还原剂组成的金属防腐涂料，凭借其强耐腐蚀性能、耐高温、具有高渗透性等优点，迅速得到广泛应用，然而，由于达克罗处理液中含有约 2％的高致癌性和强毒性的Cr6+。因此目前达克罗涂料存在不环保、耐磨性不好等缺点。
达克罗涂层中的铬酸盐主要起粘接剂和钝化剂的作用，选择铬酸盐的替代物质是无铬锌铝涂层亟需解决的问题。在《新型防腐涂层无铬达克罗的制备及耐蚀机理研究》硕士学位论文中，王全全采用聚氨酯改性环氧树脂为粘结剂，聚酰胺树脂为固化剂，配合鳞片状锌铝粉制备了一种无铬达克罗涂料，但是存在着耐磨性、强度不好的缺点。
发明内容
本发明的目的在于提供一种无铬达克罗涂料及其制备方法，克服达克罗涂料目前存在的耐磨性不好、强度不高的缺点，本发明采用的技术方案如下：
1. 一种导热性良好的无铬达克罗涂料，其特征在于，由以下重量份的原料制得：
铜粉2-3，刚玉粉 3-5，碳化硅4-8，镁粉1-2，聚四氟乙烯粉 5-10，环氧树脂E42 10-15，乙烯基三胺10-15，Fe2O31-3，锌粉20-30，铝粉20-30，硅烷偶联剂KH550 40-50，乙醇5-10，丙酮50-70，聚二甲基硅氧烷0.3-0.6；
所述锌粉和铝粉为片状粉。
2. 所述的一种导热性良好的无铬达克罗涂料，其特征在于，包括以下操作步骤：
a. 用乙醇溶液对刚玉粉进行超声分散1-2小时，过滤干燥 ；
b. 将步骤a所得刚玉粉和碳化硅、聚四氟乙烯粉在研钵中研磨使其充分混合后转入坩埚中，放置到炉体内抽真空至 10-2 Pa以下，并将炉体内温度升至 250-350℃，恒温 20-50分钟后降至室温，得到混合物；
c. 将步骤b所得混合物放入高速搅拌机中，喷洒硅烷偶联剂KH550，搅拌10-30min后，100-150℃下烘干1-3h。
d. 向步骤c所得混合物中加入丙酮和聚二甲基硅氧烷，机械搅拌均匀，制成基料；
e. 将铜粉、镁粉、Fe2O3、环氧树脂E42、乙烯基三胺、锌粉和铝粉添加到步骤d所得基料中，搅拌1～3h，即得无铬达克罗涂液。
3. 所述的一种导热性良好的无铬达克罗涂料，其特征在于，加热炉为中频感应加热炉或电阻加热炉。
本发明的有益效果是：采用环氧树脂E42为粘结剂，乙烯基三胺为固化剂，随着溶剂挥发，环氧树脂E42和乙烯基三胺固化剂发生固化交联反应，最终会形成致密、均一、连续的膜层。同时，引进刚玉粉和碳化硅，并用聚四氟乙烯粉处理刚玉粉和碳化硅，不仅使其更好的分散在涂料中，而且大大增加了涂料的强度和耐磨性能，表现出良好的流动性和附着性，形成的涂层致密光滑，解决了达克罗涂液强度较小、耐磨性不好的缺点，极具市场竞争力；配合添加的铜粉增加了涂料的导热性和导电率。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施例，进一步阐述本发明。
实施例
一种导热性良好的无铬达克罗涂料，其特征在于，由以下重量份的原料制得：
铜粉3，刚玉粉5，碳化硅8，镁粉2，聚四氟乙烯粉10，环氧树脂E42 15，乙烯基三胺15，Fe2O33，锌粉30，铝粉30，硅烷偶联剂KH550 50，乙醇10，丙酮70，聚二甲基硅氧烷0.6；
所述锌粉和铝粉为片状粉。
所述的一种导热性良好的无铬达克罗涂料，其特征在于，包括以下操作步骤：
a. 用乙醇溶液对刚玉粉进行超声分散1-2小时，过滤干燥 ；
b. 将步骤a所得刚玉粉和碳化硅、聚四氟乙烯粉在研钵中研磨使其充分混合后转入坩埚中，放置到炉体内抽真空至 10-2 Pa以下，并将炉体内温度升至 250-350℃，恒温 20-50分钟后降至室温，得到混合物；
c. 将步骤b所得混合物放入高速搅拌机中，喷洒硅烷偶联剂KH550，搅拌10-30min后，100-150℃下烘干1-3h。
d. 向步骤c所得混合物中加入丙酮和聚二甲基硅氧烷，机械搅拌均匀，制成基料；
e. 将铜粉、镁粉、Fe2O3、环氧树脂E42、乙烯基三胺、锌粉和铝粉添加到步骤d所得基料中，搅拌1～3h，即得无铬达克罗涂液。
所述的一种导热性良好的无铬达克罗涂料，其特征在于，加热炉为中频感应加热炉或电阻加热炉。
经测试：
涂层结合力 3级
耐NH4NO3腐蚀时间 239 min。

Claims (3)

1.一种导热性良好的无铬达克罗涂料，其特征在于，由以下重量份的原料制得：
铜粉2-3，刚玉粉 3-5，碳化硅4-8，镁粉1-2，聚四氟乙烯粉 5-10，环氧树脂E42 10-15，乙烯基三胺10-15，Fe2O31-3，锌粉20-30，铝粉20-30，硅烷偶联剂KH550 40-50，乙醇5-10，丙酮50-70，聚二甲基硅氧烷0.3-0.6；
所述锌粉和铝粉为片状粉。
2.根据权利要求1所述的一种导热性良好的无铬达克罗涂料，其特征在于，包括以下操作步骤：
a. 用乙醇溶液对刚玉粉进行超声分散1-2小时，过滤干燥 ；
b. 将步骤a所得刚玉粉和碳化硅、聚四氟乙烯粉在研钵中研磨使其充分混合后转入坩埚中，放置到炉体内抽真空至 10-2 Pa以下，并将炉体内温度升至 250-350℃，恒温 20-50分钟后降至室温，得到混合物；
c. 将步骤b所得混合物放入高速搅拌机中，喷洒硅烷偶联剂KH550，搅拌10-30min后，100-150℃下烘干1-3h；
d. 向步骤c所得混合物中加入丙酮和聚二甲基硅氧烷，机械搅拌均匀，制成基料；
e. 将铜粉、镁粉、Fe2O3、环氧树脂E42、乙烯基三胺、锌粉和铝粉添加到步骤d所得基料中，搅拌1～3h，即得无铬达克罗涂液。
3.根据权利要求2所述的一种导热性良好的无铬达克罗涂料，其特征在于，加热炉为中频感应加热炉或电阻加热炉。
CN201710551807.8A 2017-07-07 2017-07-07 一种导热性良好的无铬达克罗涂料及其制备方法 Pending CN107163786A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114276708A (zh) * 2022-01-05 2022-04-05 江苏融至新材料有限公司 一种耐高温抗燃烧的u型槽及其生产工艺

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CN101397413B (zh) * 2008-09-17 2011-11-23 北京航材百慕新材料技术工程股份公司 钢结构表面vci鳞片型冷镀锌铝涂料及其制备方法
CN103396709A (zh) * 2005-04-19 2013-11-20 杜邦三井氟化物有限公司 氟树脂涂膜
CN105925078A (zh) * 2016-06-14 2016-09-07 昆山初本电子科技有限公司 一种led灯散热涂料

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Publication number Priority date Publication date Assignee Title
CN103396709A (zh) * 2005-04-19 2013-11-20 杜邦三井氟化物有限公司 氟树脂涂膜
CN101397413B (zh) * 2008-09-17 2011-11-23 北京航材百慕新材料技术工程股份公司 钢结构表面vci鳞片型冷镀锌铝涂料及其制备方法
CN105925078A (zh) * 2016-06-14 2016-09-07 昆山初本电子科技有限公司 一种led灯散热涂料

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114276708A (zh) * 2022-01-05 2022-04-05 江苏融至新材料有限公司 一种耐高温抗燃烧的u型槽及其生产工艺

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