CN107216753B - 一种耐沾污外墙乳胶漆 - Google Patents

一种耐沾污外墙乳胶漆 Download PDF

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CN107216753B
CN107216753B CN201710408421.1A CN201710408421A CN107216753B CN 107216753 B CN107216753 B CN 107216753B CN 201710408421 A CN201710408421 A CN 201710408421A CN 107216753 B CN107216753 B CN 107216753B
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李振飞
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Anhui Hi Polymer Material Co Ltd
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Abstract

本发明公开了一种耐沾污外墙乳胶漆，由以下成分制成：去离子水、竹炭粉、消泡剂、椰油酸二乙醇酰胺、钛白粉、聚乙二醇、羧基包覆硅藻土与纳米二氧化硅混合粒子、碳酸钙、硅粉、丙烯酸乳液；本发明提供的耐沾污外墙乳胶漆，采用具有内硬外软型核壳结构的丙烯酸酯乳液协同羧基包覆硅藻土与纳米二氧化硅混合粒子的作用，尤其是羧基包覆硅藻土与纳米二氧化硅混合粒子发挥出显著的作用，能够显著提高外墙乳胶漆的耐沾污性。

Description

一种耐沾污外墙乳胶漆
技术领域
本发明属于乳胶漆技术领域，具体涉及一种耐沾污外墙乳胶漆。
背景技术
耐沾污性一直是考察建筑乳胶漆性能的重要指标之一，针对目前建筑乳胶漆特别是外墙乳胶漆耐沾污性不太理想的情况，具有耐沾污性能的乳胶漆受到了越来越多的关注。但长期以来，耐沾污性外墙的概念经常是消极地与粉化外墙联系在一起。但粉化自洁系统的缺点非常明显，首先它会降低漆膜厚度，使漆膜失去光彩，而且粉化不均匀还会造成漆膜发花的现象，对深色乳胶漆尤其明显。
发明内容
本发明的目的是针对现有的问题，提供了一种耐沾污外墙乳胶漆。
本发明是通过以下技术方案实现的：
一种耐沾污外墙乳胶漆，按重量份计由以下成分制成：去离子水 120-200、竹炭粉2-6、消泡剂1-3、椰油酸二乙醇酰胺1-1.5、钛白粉90-120、聚乙二醇2-4、羧基包覆硅藻土与纳米二氧化硅混合粒子10-15、碳酸钙30-40、硅粉30-50、丙烯酸乳液180-220。
进一步的，所述竹炭粉经过预处理：将竹炭粉采用质量分数为1.5%的氢氧化钠溶液在60-80℃下浸泡40min，然后进行研磨2小时，再过滤，采用去离子水清洗，烘干至恒重，过800目筛，即可。
进一步的，所述钛白粉为金红石型钛白粉。
进一步的，所述消泡剂为聚醚类消泡剂或有机硅类消泡剂中任一种。
进一步的，所述增稠剂为聚氨酯，所述分散剂为氨基磺酸盐分散剂和聚丙烯酸盐分散剂。
进一步的，所述羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法为：
（1）将硅藻土过1200目筛，选择粒径为60-80nm的纳米二氧化硅；
（2）将硅藻土与纳米二氧化硅按40:1-3的质量比例均匀混合到一起，然后添加硅藻土质量20倍的去离子水，在500r/min转速下搅拌均匀后，静置2min，得到悬浮混合液；
（3）向悬浮混合液中添加其质量1.2-1.5%羧基聚丁二烯，加热至60℃，以1500r/min转速搅拌2小时，然后保温自然静置10min，然后采用功率为200W的超声波处理2min，再调节温度至40℃，以3000r/min转速搅拌40min，然后保温静置10min，再自然冷却至室温，过滤，采用去离子水清洗2min，然后进行真空烘干至恒重，即可。
进一步的，所述碳酸钙为重质碳酸钙，碳酸钙的粒度为800-1000目。
进一步的，所述硅粉粒度为800-1000目。
本发明相比现有技术具有以下优点：本发明提供的耐沾污外墙乳胶漆，采用具有内硬外软型核壳结构的丙烯酸酯乳液协同羧基包覆硅藻土与纳米二氧化硅混合粒子的作用，尤其是羧基包覆硅藻土与纳米二氧化硅混合粒子发挥出显著的作用，能够显著提高外墙乳胶漆的耐沾污性，且贮存稳定，使得外墙乳胶漆在经过风吹日晒雨淋还能保持原来的装饰效果，有效延长外墙乳胶漆的使用寿命，本发明所制乳胶漆具有拒水保洁强、性价比好的优点，漆层表面被羧基包覆硅藻土与纳米二氧化硅混合粒子均匀层叠，使得漆层表面具有仿荷叶表面结构的微观构造，使得漆层表面保持着超疏水性和良好的保洁效果。
具体实施方式
实施例1
一种耐沾污外墙乳胶漆，按重量份计由以下成分制成：去离子水 120、竹炭粉2、消泡剂1、椰油酸二乙醇酰胺1、钛白粉90、聚乙二醇2、羧基包覆硅藻土与纳米二氧化硅混合粒子10、碳酸钙30、硅粉30、丙烯酸乳液180。
所述竹炭粉经过预处理：将竹炭粉采用质量分数为1.5%的氢氧化钠溶液在60-80℃下浸泡40min，然后进行研磨2小时，再过滤，采用去离子水清洗，烘干至恒重，过800目筛，即可。
所述钛白粉为金红石型钛白粉。
所述消泡剂为聚醚类消泡剂或有机硅类消泡剂中任一种。
所述增稠剂为聚氨酯，所述分散剂为氨基磺酸盐分散剂和聚丙烯酸盐分散剂。
所述羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法为：
（1）将硅藻土过1200目筛，选择粒径为60nm的纳米二氧化硅；
（2）将硅藻土与纳米二氧化硅按40:1的质量比例均匀混合到一起，然后添加硅藻土质量20倍的去离子水，在500r/min转速下搅拌均匀后，静置2min，得到悬浮混合液；
（3）向悬浮混合液中添加其质量1.2%羧基聚丁二烯，加热至60℃，以1500r/min转速搅拌2小时，然后保温自然静置10min，然后采用功率为200W的超声波处理2min，再调节温度至40℃，以3000r/min转速搅拌40min，然后保温静置10min，再自然冷却至室温，过滤，采用去离子水清洗2min，然后进行真空烘干至恒重，即可。
所述碳酸钙为重质碳酸钙，碳酸钙的粒度为800目。
所述硅粉粒度为800目。
实施例2
一种耐沾污外墙乳胶漆，按重量份计由以下成分制成：去离子水 200、竹炭粉6、消泡剂3、椰油酸二乙醇酰胺1.5、钛白粉120、聚乙二醇4、羧基包覆硅藻土与纳米二氧化硅混合粒子15、碳酸钙40、硅粉50、丙烯酸乳液220。
所述竹炭粉经过预处理：将竹炭粉采用质量分数为1.5%的氢氧化钠溶液在80℃下浸泡40min，然后进行研磨2小时，再过滤，采用去离子水清洗，烘干至恒重，过800目筛，即可。
所述钛白粉为金红石型钛白粉。
所述消泡剂为聚醚类消泡剂或有机硅类消泡剂中任一种。
所述增稠剂为聚氨酯，所述分散剂为氨基磺酸盐分散剂和聚丙烯酸盐分散剂。
所述羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法为：
（1）将硅藻土过1200目筛，选择粒径为80nm的纳米二氧化硅；
（2）将硅藻土与纳米二氧化硅按40:3的质量比例均匀混合到一起，然后添加硅藻土质量20倍的去离子水，在500r/min转速下搅拌均匀后，静置2min，得到悬浮混合液；
（3）向悬浮混合液中添加其质量1.5%羧基聚丁二烯，加热至60℃，以1500r/min转速搅拌2小时，然后保温自然静置10min，然后采用功率为200W的超声波处理2min，再调节温度至40℃，以3000r/min转速搅拌40min，然后保温静置10min，再自然冷却至室温，过滤，采用去离子水清洗2min，然后进行真空烘干至恒重，即可。
所述碳酸钙为重质碳酸钙，碳酸钙的粒度为1000目。
所述硅粉粒度为1000目。
实施例3
一种耐沾污外墙乳胶漆，按重量份计由以下成分制成：去离子水 180、竹炭粉4、消泡剂2、椰油酸二乙醇酰胺1.2、钛白粉100、聚乙二醇3、羧基包覆硅藻土与纳米二氧化硅混合粒子12、碳酸钙35、硅粉40、丙烯酸乳液200。
所述竹炭粉经过预处理：将竹炭粉采用质量分数为1.5%的氢氧化钠溶液在70℃下浸泡40min，然后进行研磨2小时，再过滤，采用去离子水清洗，烘干至恒重，过800目筛，即可。
所述钛白粉为金红石型钛白粉。
所述消泡剂为聚醚类消泡剂或有机硅类消泡剂中任一种。
所述增稠剂为聚氨酯，所述分散剂为氨基磺酸盐分散剂和聚丙烯酸盐分散剂。
所述羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法为：
（1）将硅藻土过1200目筛，选择粒径为70nm的纳米二氧化硅；
（2）将硅藻土与纳米二氧化硅按40:2的质量比例均匀混合到一起，然后添加硅藻土质量20倍的去离子水，在500r/min转速下搅拌均匀后，静置2min，得到悬浮混合液；
（3）向悬浮混合液中添加其质量1.3%羧基聚丁二烯，加热至60℃，以1500r/min转速搅拌2小时，然后保温自然静置10min，然后采用功率为200W的超声波处理2min，再调节温度至40℃，以3000r/min转速搅拌40min，然后保温静置10min，再自然冷却至室温，过滤，采用去离子水清洗2min，然后进行真空烘干至恒重，即可。
所述碳酸钙为重质碳酸钙，碳酸钙的粒度为900目。
所述硅粉粒度为900目。
对比例1：与实施例3区别仅在于仅仅采用普通未处理的硅藻土与纳米二氧化硅混合粒子。
对比例2：与实施例3区别仅在于仅采用羧基包覆硅藻土粒子，制备方法与实施例3中羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法相同.
对比例3：与实施例3区别仅在于仅采用羧基包覆纳米二氧化硅粒子，制备方法与实施例3中羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法相同。
采用接触角测定仪测定水与漆层表面的接触角，表1为漆层水接触角：
表1
接触角°
实施例1 168
实施例2 167
实施例3 169
对比例1 152
对比例2 158
对比例3 163
由表1可以看出，羧基包覆硅藻土与纳米二氧化硅混合粒子对漆层接触角具有明显的影响，显著提高了漆层的耐沾污性；
进一步试验，以实施例3方法制备外墙漆，以羧基包覆硅藻土与纳米二氧化硅混合粒子中硅藻土与纳米二氧化硅质量比为变量，研究其质量比对漆层接触角的影响：
表2
硅藻土与纳米二氧化硅质量比 接触角°
40:0.1 165
40:0.5 166
40:1 168
40:2 169
40:3 167
40:3.1 166
40:3.5 165
由表2可以看出，漆层接触角随着纳米二氧化硅含量的增加而增加，当增加到一定程度后，继续增加，漆层接触角逐渐降低。

Claims (5)

1.一种耐沾污外墙乳胶漆，其特征在于，按重量份计由以下成分制成：去离子水 120-200、竹炭粉2-6、消泡剂1-3、椰油酸二乙醇酰胺1-1.5、钛白粉90-120、聚乙二醇2-4、羧基包覆硅藻土与纳米二氧化硅混合粒子10-15、碳酸钙30-40、硅粉30-50、丙烯酸乳液180-220；所述竹炭粉经过预处理：将竹炭粉采用质量分数为1.5%的氢氧化钠溶液在60-80℃下浸泡40min，然后进行研磨2小时，再过滤，采用去离子水清洗，烘干至恒重，过800目筛，即可；所述羧基包覆硅藻土与纳米二氧化硅混合粒子制备方法为：
（1）将硅藻土过1200目筛，选择粒径为60-80nm的纳米二氧化硅；
（2）将硅藻土与纳米二氧化硅按40:1-3的质量比例均匀混合到一起，然后添加硅藻土质量20倍的去离子水，在500r/min转速下搅拌均匀后，静置2min，得到悬浮混合液；
（3）向悬浮混合液中添加其质量1.2-1.5%羧基聚丁二烯，加热至60℃，以1500r/min转速搅拌2小时，然后保温自然静置10min，然后采用功率为200W的超声波处理2min，再调节温度至40℃，以3000r/min转速搅拌40min，然后保温静置10min，再自然冷却至室温，过滤，采用去离子水清洗2min，然后进行真空烘干至恒重，即可。
2.如权利要求1所述一种耐沾污外墙乳胶漆，其特征在于，所述钛白粉为金红石型钛白粉。
3.如权利要求1所述一种耐沾污外墙乳胶漆，其特征在于，所述消泡剂为聚醚类消泡剂或有机硅类消泡剂中任一种。
4.如权利要求1所述一种耐沾污外墙乳胶漆，其特征在于，所述碳酸钙为重质碳酸钙，碳酸钙的粒度为800-1000目。
5.如权利要求1所述一种耐沾污外墙乳胶漆，其特征在于，所述硅粉粒度为800-1000目。
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