CN107936820A - 一种水性漆分散工艺 - Google Patents
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Abstract
本发明公开了一种水性漆分散工艺，其制备方法如下：在惰性气体保护下，搅拌过程中将异氰酸酯单体加入到羟基丁苯橡胶中，反应0.5~2h，升温至70~90℃，加入二羟甲基丙酸和聚醚多元醇，反应3~5h，降温至40~60℃，加入三乙胺进行中和反应，反应0.1~2h，加入去离子水，转速700~900转/分钟下剪切分散，加入乙二胺进行扩链反应，反应1~3h，得到水性漆分散体。本发明提供的水性漆分散体由于引入了丁基橡胶片段，使分子链呈微相分离，从而造成分子内消光，使产品具有自哑光的性能。将本发明提供的水性漆分散体制备成的涂料，透明性和手感良好。
Description
技术领域
本发明属于高分子材料聚氨酯技术领域，尤其涉及一种水性漆分散体的制备方法及水性漆分散体的用途。
背景技术
水性漆是以水为分散介质配置的涂料，具有毒性小、不易燃烧、不污染环境、节能、安全等优点，同时还具有溶剂型聚氨酯涂料的性能，应用于皮革、包装等特殊材料的时候，往往需要涂膜具有哑光性能，市场上普遍流行的是在涂料中添加哑粉来消光，但是哑粉加入后，会导致漆膜的物化性能大大降低，所以国外正在积极寻求一种可以自消光的树脂，目前哑光树脂通过相容性的差异或粒径的差异达到消光，通常在树脂结构中引入一些硅类基团或丙烯酸酯大分子基团，此类方法可以有效消光但是会引起涂膜浑浊发蒙。
发明内容
针对现有技术的问题，本发明的目的是提供一种水性漆分散工艺，该方法简单方便。
为了实现上述目的，本发明的技术方案如下：
本发明提供了一种水性漆分散工艺，包括以下步骤：在惰性气体保护下，搅拌下将异氰酸酯单体加入到羟基丁苯橡胶中，反应0.5～2h，升温至70～90℃，加入二羟甲基丙酸和聚醚多元醇，反应3～5h，降温至40～60℃，加入三乙胺进行中和反应，反应0.1～2h，加入去离子水，转速700～900转/分钟下剪切分散，加入乙二胺进行扩链反应，反应1～3h，得到水性漆分散体；向水性漆分散体中依次加入三羟甲基丙烷-三丙酸酯、基于六亚甲基二异氰酸酯HDI的亲水改性脂肪族聚异氰酸酯、二丙二醇甲醚、水性流平剂和水性消泡剂，高速剪切搅拌加入氨水调节PH值到8.0，加入无溶剂聚氨酯类增稠剂，喷涂在打有底漆的ABS塑料板上，烘干，老化后得到水性漆涂料。
所述异氰酸酯单体与羟基丁苯橡胶的质量比为1:1～2.5:1；所述异氰酸酯单体与二羟甲基丙酸的质量比为1:1～2.0:1；所述异氰酸酯单体与聚醚多元醇的质量比为0.4:1～0.6:1；所述异氰酸酯单体与三乙胺的质量比为6:1～10:1；所述异氰酸酯单体与去离子水的质量比为0.1:1～0.15:1；所述异氰酸酯单体与乙二胺的质量比为17:1～24:1，所述水性漆分散体的固含量为33～35％。
所述水性聚氨酯分散体与水性流平剂的质量比为200:1；所述水性漆分散体与水性消泡剂的质量比为1000:3；
所述水性漆分散体与无溶剂聚氨酯类增稠剂的质量比为200:1。
所述烘干是在80℃下烘1小时，所述老化是在60℃下老化4小时。
所述水性聚氨酯分散体与三羟甲基丙烷-三丙酸酯的质量比为50:1；所述水性漆分散体与基于六亚甲基二异氰酸酯HDI的亲水改性脂肪族聚异氰酸酯的质量比为20:1；所述水性漆分散体与二丙二醇甲醚的质量比为20:1。
本发明同现有技术相比，具有以下优点和有益效果：
1、本发明提供的水性漆分散体由于引入了丁基橡胶片段，使分子链呈微相分离，从而造成分子内消光，使产品具有自哑光的性能。
2、本发明提供的水性漆分散体的制备方法简单。
3、将本发明提供的水性漆分散体制备成的涂料，由于水性漆分散体中引入了丁基橡胶片段，使得水性漆分散体具有自哑光的性能，所以制备而成的涂料透明性和手感良好。
具体实施方式
以下结合实施例对本发明进行进一步详细说明。
实施例1
在有氮气保护的密封容器中，在搅拌的情况下，将74.8克异佛尔酮二异氰酸酯滴加到51.3克的羟基丁苯橡胶中，搅拌1.5小时，完成后，升温到80℃，加入41.5克的二羟甲基丙酸和128.7克的聚醚多元醇（Mn约1500），搅拌反应约4小时，降低体系温度到50℃左右，加入8.7克的三乙胺进行中和反应，搅拌0.5小时后，加入约580克的去离子水，提升搅拌速率到800转/分钟，进行剪切分散，在NCO降低到2.1wt%之前，加入水稀释过的3.7克乙二胺，进行扩链反应，搅拌约2小时候后，得到了固含量约34%的水性漆分散体。
取聚氨酯分散体100克，加入2克三羟甲基丙烷-三[3-(2-甲基氮丙啶基)]丙酸酯），加入5克Bayhydur3100，加入5克二丙二醇甲醚（DPM），加入0.5克水性流平剂BYK346，加入0.3克水性消泡剂BYK028，高速剪切搅拌加入氨水调节PH值到8.0，加入0.5克增稠剂，喷涂在打有黑色底漆的ABS塑料板上，80℃下烘1个小时，60℃下加速老化4小时，放置24小时后候测试性能；手触感非常柔软光滑，光泽（60°角）<50°，RCA175克>50次，MEK点滴测试>2分钟，耐咖啡、红茶、护手霜、人工汗液24小时无痕。
本发明提供的水性漆分散体由于引入了丁基橡胶片段，使分子链呈微相分离，从而造成分子内消光，使产品具有自哑光的性能。
将本发明提供的水性漆分散体制备成的涂料，由于水性漆分散体中引入了丁基橡胶片段，使得水性漆分散体具有自哑光的性能，所以制备而成的涂料透明性和手感良好。
实施例2
在有氮气保护的密封容器中，在搅拌的情况下，将51.6克异佛尔酮二异氰酸酯滴加到50.4克的羟基丁苯橡胶中，搅拌1.5小时，完成后，升温到80℃，加入42.6克的二羟甲基丙酸和125.8克的聚醚多元醇（Mn约1500），搅拌反应约4小时，降低体系温度到50℃左右，加入7.9克的三乙胺进行中和反应，搅拌0.5小时后，加入约540克的去离子水，提升搅拌速率到800转/分钟，进行剪切分散，在NCO降低到1.3wt%之前，加入水稀释过的3.0克乙二胺，进行扩链反应，搅拌约2小时候后，得到了固含量约34%的水性漆分散体。
取聚氨酯分散体100克，加入2克三羟甲基丙烷-三[3-(2-甲基氮丙啶基)]丙酸酯），加入5克Bayhydur3100，加入5克二丙二醇甲醚（DPM），加入0.5克水性流平剂BYK346，加入0.3克水性消泡剂BYK028，高速剪切搅拌加入氨水调节PH值到8.0，加入0.5克增稠剂，喷涂在打有黑色底漆的ABS塑料板上，80℃下烘1个小时，60℃下加速老化4小时，放置24小时后候测试性能；手触感非常柔软，光泽（60°角）<40°，RCA175克>30次，MEK点滴测试>1分钟，耐咖啡、红茶、护手霜、人工汗液24小时无痕。
实施例3
在有氮气保护的密封容器中，在搅拌的情况下，将87.1克异佛尔酮二异氰酸酯滴加到38.2克的羟基丁苯橡胶中，搅拌1.5小时，完成后，升温到80℃，加入58.2克的二羟甲基丙酸和147.5克的聚醚多元醇（Mn约1500），搅拌反应约4小时，降低体系温度到50℃左右，加入9.2克的三乙胺进行中和反应，搅拌0.5小时后，加入约620克的去离子水，提升搅拌速率到800转/分钟，进行剪切分散，在NCO降低到2.7wt%之前，加入水稀释过的3.7克乙二胺，进行扩链反应，搅拌约2小时候后，得到了固含量约34%的水性漆分散体。
取聚氨酯分散体100克，加入2克CX-100（三羟甲基丙烷-三[3-(2-甲基氮丙啶基)]丙酸酯），加入5克Bayhydur3100，加入5克二丙二醇甲醚（DPM），加入0.5克水性流平剂BYK346，加入0.3克水性消泡剂BYK028，高速剪切搅拌加入氨水调节PH值到8.0，加入0.5克增稠剂，喷涂在打有黑色底漆的ABS塑料板上，80℃下烘1个小时，60℃下加速老化4小时，放置24小时后候测试性能；手触感稍柔软，光泽（60°角）>60°，RCA175克>70次，MEK点滴测试>2分钟，耐咖啡、红茶、护手霜、人工汗液24小时无痕。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和应用本发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于这里的实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。
Claims (5)
1.一种水性漆分散工艺，其特征在于，包括以下步骤：在惰性气体保护下，搅拌下将异氰酸酯单体加入到羟基丁苯橡胶中，反应0.5～2h，升温至70～90℃，加入二羟甲基丙酸和聚醚多元醇，反应3～5h，降温至40～60℃，加入三乙胺进行中和反应，反应0.1～2h，加入去离子水，转速700～900转/分钟下剪切分散，加入乙二胺进行扩链反应，反应1～3h，得到水性漆分散体；向水性漆分散体中依次加入三羟甲基丙烷-三丙酸酯、基于六亚甲基二异氰酸酯HDI的亲水改性脂肪族聚异氰酸酯、二丙二醇甲醚、水性流平剂和水性消泡剂，高速剪切搅拌加入氨水调节PH值到8.0，加入无溶剂聚氨酯类增稠剂，喷涂在打有底漆的ABS塑料板上，烘干，老化后得到水性漆涂料。
2.根据权利要求1所述的水性漆分散工艺，其特征在于，所述异氰酸酯单体与羟基丁苯橡胶的质量比为1:1～2.5:1；所述异氰酸酯单体与二羟甲基丙酸的质量比为1:1～2.0:1；所述异氰酸酯单体与聚醚多元醇的质量比为0.4:1～0.6:1；所述异氰酸酯单体与三乙胺的质量比为6:1～10:1；所述异氰酸酯单体与去离子水的质量比为0.1:1～0.15:1；所述异氰酸酯单体与乙二胺的质量比为17:1～24:1，所述水性漆分散体的固含量为33～35％。
3.根据权利要求1所述的水性漆分散工艺，其特征在于，所述水性聚氨酯分散体与水性流平剂的质量比为200:1；所述水性漆分散体与水性消泡剂的质量比为1000:3；
所述水性漆分散体与无溶剂聚氨酯类增稠剂的质量比为200:1。
4.根据权利要求1所述的水性漆分散工艺，其特征在于，所述烘干是在80℃下烘1小时，所述老化是在60℃下老化4小时。
5.根据权利要求1所述的水性漆分散工艺，其特征在于，所述水性聚氨酯分散体与三羟甲基丙烷-三丙酸酯的质量比为50:1；所述水性漆分散体与基于六亚甲基二异氰酸酯HDI的亲水改性脂肪族聚异氰酸酯的质量比为20:1；所述水性漆分散体与二丙二醇甲醚的质量比为20:1。
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