CN107011702A - 一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法 - Google Patents
一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法 Download PDFInfo
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Abstract
本发明涉及氧化铁黄颜料,尤其涉及一种磷酸锌包裹耐热型氧化铁黄颜料及其制备方法。一种磷酸锌包裹耐热型氧化铁黄颜料,氧化铁黄原料外层包裹致密的磷酸锌。本发明通过磷酸锌包覆氧化铁黄形成的复合材料提高了氧化铁黄的耐热性,能在塑料加工和粉末涂料应用时作为着色剂和防腐剂使用。本发明合成的包覆型氧化铁黄具有耐热性能好,合成方法简单、成本低、安全环保等优点,具有较高的工业应用价值。
Description
技术领域
本发明涉及氧化铁黄颜料,尤其涉及一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法。
背景技术
近年来,中国氧化铁产业已经进入产能过剩和竞争的阶段,产能过剩是整个氧化铁行业面临的重大难题,当前我国的氧化铁行业还处于粗放式的发展阶段,产品和工艺缺少革新。无法将资源优势转化成经济优势和技术优势。
氧化铁黄简称铁黄,是含水的三氧化二铁,分子式为FeOOH,氧化铁黄是一种柠檬黄至褐色的粉末,由于生产方法和操作条件的不同,其晶体结构和物理性质会有很大的差异。氧化铁黄在177℃以上环境下会逐渐脱去结晶水,变成氧化铁红。由于氧化铁黄热稳定性较差,因此在塑料加工和粉末涂料着色应用上受到较大的限制。
磷酸锌作为传统的防锈颜料,其在溶剂型涂料中的防锈能力已经得到了涂料界的肯定,是无毒防锈颜料中最重要的组成部分,国外认为磷酸锌从磷酸盐中被挑选出来是一个重大的发展和促进,甚至把它看作是涂料工业发展的里程碑之一。
发明内容
本发明为了克服氧化铁黄在塑料加工和粉末涂料应用中耐热性的不足,本发明的目的是提供一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,本发明合成的磷酸锌包裹耐热型氧化铁黄颜料在氧化铁黄外包覆一层致密磷酸锌来提高氧化铁黄耐热性能,并具有防腐功能。
为了实现上述的第一个目的,本发明采用了以下的技术方案:
一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,该方法包括以下的步骤:
1)搅拌下将氧化铁黄原料和聚乙二醇均匀分散在水中,形成氧化铁黄含量为5~30%的混合液,聚乙二醇质量为氧化铁黄质量的0.1~1%;
2)将锌盐溶于水配置成溶液A,氢氧化钠溶于水配置成溶液B、六偏磷酸钠溶于水配置成溶液C;
3)然后将溶液A、溶液B和溶液C在搅拌下同时加入氧化铁黄混合液中,反应温度控制在50~90℃,待溶液加完后继续搅拌0.5~20h;经压滤、洗涤后将滤饼在50~105℃下烘干、粉碎,得到产品,产品中氧化铁黄原料外层包裹致密的磷酸锌,氧化铁黄与包覆层磷酸锌的质量比为1∶100~100∶1。
作为优选,所述的氧化铁黄与包覆层磷酸锌的质量比为1∶10~10∶1。
作为优选,所述的锌盐为硫酸盐、硝酸盐或者氯化物的一种或多种。
作为优选,所述的锌盐、六偏磷酸钠、氢氧化钠的摩尔比为3:2~3:4~5。
本发明通过磷酸锌包覆氧化铁黄形成的复合材料提高了氧化铁黄的耐热性,耐热性达到270度,能在塑料加工和粉末涂料应用时作为着色剂和防腐剂使用。本发明合成的包覆型氧化铁黄具有耐热性能好,合成方法简单、成本低、安全环保等优点,具有较高的工业应用价值。
具体实施方式
本具体实施例仅仅是对本发明的解释其并不是对本发明的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实例做出没有创新性的修改,但只要在本发明的要求范围内都受到专利法的保护。
实施例1
称取20Kg氧化铁黄颜料810#和0.1Kg聚乙二醇2000,搅拌下将氧化铁黄均匀分散于200L水中,形成氧化铁黄含量为10%的混合液;分别称取3.35Kg氯化锌、2.53Kg六偏磷酸钠、1.64Kg氢氧化钠,分别溶于100 L水配置成溶液A、溶液B和溶液C;然后将溶液A 、溶液B和溶液C在搅拌下同时加入氧化铁黄混合液中,反应温度控制在80℃,待溶液加完后继续搅拌3h ;经压滤、洗涤后将滤饼在90℃下烘干、粉碎,得到耐热型氧化铁黄产品A。
实施例2
称取10Kg氧化铁黄颜料810#和0.03Kg聚乙二醇2000,搅拌下将氧化铁黄均匀分散于200 L水中,形成氧化铁黄含量为5%的混合液;分别称取4.65Kg硝酸锌、1.68Kg六偏磷酸钠、1.31Kg氢氧化钠,分别溶于30 L水配置成溶液A、溶液B和溶液C;然后将溶液A 、溶液B和溶液C在搅拌下同时加入氧化铁黄混合液中,反应温度控制在70℃,待溶液加完后继续搅拌10h ;经压滤、洗涤后将滤饼在100℃下烘干、粉碎,得到耐热型氧化铁黄产品B。
实施例3
称取30Kg氧化铁黄颜料810#和0.3Kg聚乙二醇2000,搅拌下将氧化铁黄均匀分散于100L水中,形成氧化铁黄含量为30%的混合液;分别称取3.97Kg硫酸锌、2.53Kg六偏磷酸钠、1.64Kg氢氧化钠,分别溶于80 L水配置成溶液A、溶液B和溶液C;然后将溶液A 、溶液B和溶液C在搅拌下同时加入氧化铁黄混合液中,反应温度控制在50℃,待溶液加完后继续搅拌18h;经压滤、洗涤后将滤饼在80℃下烘干、粉碎,得到耐热型氧化铁黄产品C。
耐热性测试:称取产品2g,装入小坩埚中在270℃烘箱中加热0.5h,取出后冷却,然后在分光测色仪上测试产品色差值ΔE。得到耐热型氧化铁黄产品A、耐热型氧化铁黄产品B、耐热型氧化铁黄C 的ΔE 分别为0.92,1.60,1.33。
吸油量测试:根据《GB/T1863-2008涂料与颜料标准汇编》测试包覆氧化铁黄颜料吸油量,耐热型氧化铁黄产品A、耐热型氧化铁黄产品B、耐热型氧化铁黄C 的吸油量分别为31.8g/100g, 33.5g/100g, 32.6g/100g,表明包覆颜料的分散性能较好。
经测试表明,磷酸锌包覆氧化铁黄产品具有优异的耐热性能,能在270 度作为塑料加工和粉末涂料着色剂使用。
Claims (4)
1.一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,其特征在于该方法包括以下的步骤:
1)搅拌下将氧化铁黄原料和聚乙二醇均匀分散在水中,形成氧化铁黄含量为5~30%的混合液,聚乙二醇质量为氧化铁黄质量的0.1~1%;
2)将锌盐溶于水配置成溶液A,氢氧化钠溶于水配置成溶液B、六偏磷酸钠溶于水配置成溶液C;
3)然后将溶液A、溶液B和溶液C在搅拌下同时加入氧化铁黄混合液中,反应温度控制在50~90℃,待溶液加完后继续搅拌0.5~20h;经压滤、洗涤后将滤饼在50~105℃下烘干、粉碎,得到产品,产品中氧化铁黄原料外层包裹致密的磷酸锌,氧化铁黄与包覆层磷酸锌的质量比为1∶100~100∶1。
2.根据权利要求1所述的一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,其特征在于:氧化铁黄与包覆层磷酸锌的质量比为1∶10~10∶1。
3.根据权利要求1所述的一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,其特征在于:锌盐为硫酸盐、硝酸盐或者氯化物的一种或多种。
4.根据权利要求1所述的一种磷酸锌包裹耐热型氧化铁黄颜料的合成方法,其特征在于:锌盐、六偏磷酸钠、氢氧化钠的摩尔比为3:2~3:4~5。
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CN113955807A (zh) * | 2021-11-23 | 2022-01-21 | 中钢天源股份有限公司 | 一种耐300℃中温氧化铁黄的制备方法及氧化铁黄 |
CN114479515A (zh) * | 2022-01-16 | 2022-05-13 | 湖州师范学院 | 一种优化包裹型氧化铁黄颜料耐热性的方法 |
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