CN113248964A - 一种高光泽耐黄变的环保型水性面漆固化剂及制备工艺 - Google Patents
一种高光泽耐黄变的环保型水性面漆固化剂及制备工艺 Download PDFInfo
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Abstract
本发明属于固化剂技术领域,一种高光泽耐黄变的环保型水性面漆固化剂及制备工艺,其特征在于:其各组分按重量份计包括:HDI预聚物55‑60份、季铵碱催化剂0.1‑0.2份、AMP‑95为0.4‑0.5份、防腐剂0.2‑0.25份、分散剂0.3‑0.35份、润湿剂0.3‑0.35份、消泡剂0.2‑0.25份、高岭土8‑9份、羟乙基纤维素0.4‑0.5份、去离子水25‑35份、助剂0.5‑0.7份、改性纳米氧化钇0.25‑0.3份,本发明采用将HDI预聚物与多种物质进行混合反应形成一种具有高光泽耐黄变的环保型水性面漆固化剂,不仅能够提高面漆的硬度、在保证耐黄变的前提下还能够提高面漆的光泽度。
Description
技术领域
本发明属于固化剂技术领域,特别涉及一种高光泽耐黄变的环保型水性面漆固化剂及制备工艺。
背景技术
水性固化剂是可适用于多种环氧树脂并提供不同硬化速度的硬化剂。低黏度,低色泽,不易燃,易清洗,易使用。尤其在潮湿的混凝土条件下具有良好的黏结力,耐磨损。
申请公告号为CN106280742A的中国发明专利公开了一种水性面漆及其制备方法,发明人研发出了一种泛白能迅速恢复的水性面漆。由于漆膜遇水之后,水分子会渗入到漆膜内部,此时,漆膜折光率将发生变化并导致漆面泛白;漆膜干燥后形成的致密结构使得水分子不易挥发出来;因此;漆膜持续发白;这就是泛白不易恢复的本质原因。针对此泛白机理,发明人拟利用粒径较大且具有优异耐水性的一类哑粉,并按照特定组分与配比,制备水性面漆;由于使用了粒径较大且具有优异耐水性的哑粉,使得漆膜表面致密度相对降低(相对于粒径较小的哑粉),因此,进入到漆膜中的水分子容易从相对密度较为疏松的漆膜中溢出,最终实现泛白迅速恢复的效果;该发明中利用哑粉来进行防变色处理,但是该方式形成的面漆光泽度较低,并且由于哑粉的颗粒较大,容易使面漆的造成一定的颗粒感,使面漆的强度降低,同时,该哑粉并不能够解决固化剂的泛黄的问题。
发明内容
本发明的目的是提供一种高光泽耐黄变的环保型水性面漆固化剂及制备工艺,本发明采用将HDI预聚物与多种物质进行混合反应形成一种具有高光泽耐黄变的环保型水性面漆固化剂,不仅能够提高面漆的硬度、在保证耐黄变的前提下还能够提高面漆的光泽度。
本发明的上述技术目的是通过以下技术方案得以实现的:一种高光泽度耐黄变的环保型水性面漆固化剂,其各组分按重量份计包括:HDI预聚物55-60份、季铵碱催化剂0.1-0.2份、AMP-95为0.4-0.5份、防腐剂0.2-0.25份、分散剂0.3-0.35份、润湿剂0.3-0.35份、消泡剂0.2-0.25份、高岭土8-9份、羟乙基纤维素0.4-0.5份、去离子水25-35份、助剂0.5-0.7份、改性纳米氧化钇0.25-0.3份。
本发明的进一步设置为:所述季铵碱催化剂为β-羟丙基季氨碱。
本发明的进一步设置为:所述β-羟丙基季氨碱通过以下步骤制备:在氮气的保护下,将20-30g的环氧丙烷在1h内滴加到60-70g的三乙胺和10-15g水的体系中,维持体系温度为30℃,待环氧丙烷滴加完毕,连续搅拌12h,停止反应后,用旋转蒸发仪分离出下层黄色液体,得到β-羟丙基季氨碱。
本发明的进一步设置为:所述改性纳米氧化钇通过以下步骤进行制备:取适量的硅烷偶联剂滴加溶于一定量的乙醇溶液,并调节溶液酸碱度,然后进行超声分散5min使其混合均匀,再静止一定时间进行水解,接着往溶液中加入氧化钇纳米颗粒,在恒温条件下进行搅拌,反应结束后离心洗涤干燥得到改性纳米氧化钇。
本发明的进一步设置为:所述助剂包括次亚磷酸脂、亚磷酸钠、亚磷酸三苯酯、季戊四醇、三烷基亚磷酸酯中的一种或两种两种以上。
一种高光泽度耐黄变的环保型水性面漆固化剂的制备工艺,其特征在于:包括以下步骤:
S1:将去离子水加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂、分散剂、润湿剂、消泡剂和高岭土依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素,高速搅拌20min后再将AMP-95混合后加入,搅拌20分钟后,继续加入HDI预聚物、季铵碱催化剂、消泡剂和助剂,高速搅拌20分钟;
S3:再将步骤S2中得到的物质中加入改性纳米氧化钇继续进行超声搅拌,超声搅拌10分钟停机出料,得到水性面漆固化剂。
本发明的有益效果是:。
1、本发明采用将HDI预聚物与多种物质进行混合反应形成一种具有高光泽耐黄变的环保型水性面漆固化剂,不仅能够提高面漆的硬度、在保证耐黄变的前提下还能够提高面漆的光泽度。
2、本发明在水性面漆固化剂添加了改性纳米氧化钇材料,氧化钇具有优异的化学稳定性,热稳定性和机械稳定型,这些由于的性质能够使其成为良好的耐磨、耐腐和耐高温材料,但由于氧化钇纳米颗粒团聚严重,在固化剂中难以润湿和粉分散,本发明利用硅烷偶联剂对纳米氧化钇表面的羟基进行反应,可以将其接枝到纳米颗粒表面。而硅烷偶联剂的另一端具有与有机物反应的官能团,从而提高了纳米颗粒在有机介质中的相容性,改性纳米氧化钇的加入不仅能够填补涂层中间的间隙位置,起到减少涂层空隙的作用,从而提高涂层的致密度,进一步提高了涂层的耐腐蚀性和硬度。
3、本发明中采用了少量的季铵碱催化剂,在HDI固化剂制备过程中,由于含有少量的游离异氰酸酯基,后期使用过程中易挥发,对人体造成伤害,在反应中加入β-羟丙基季氨碱,能够使游离的异氰酸酯自聚而降低游离单体的含量,另一方,在β-羟丙基季氨碱催化剂的作用下能够使部分HDI预聚物形成HDI三聚体,添加了HDI三聚体的聚氨酯涂料具有优越的耐候性、耐热性、保光性和保色性。
4、本发明中采用的助剂能够明显降低固化剂的发黄速率以及变色度,这是由于亚磷酸酯能够与潮气作用,进而阻止了TDI与潮气的作用,亚磷酸酯在吸潮过程中消除了一分子的水形成了一份子的醇,醇能够与异氰酸酯发生作用形成氨酯键,形成的产物无色,后期实用过程中不会变黄,而形成的产物还能够与铵类物质发生反应,以防止胺被氧化形成有颜色的醌类物质。
具体实施方式
下面将对实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。基于本发明的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:
一种高光泽度耐黄变的环保型水性面漆固化剂的制备工艺,包括以下步骤:
S1:将去离子水25份加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂0.2份、分散剂0.3份、润湿剂0.3份、消泡剂0.2份和高岭土8份依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素0.4份,高速搅拌20min后再将0.4份AMP-95与水混合后加入,搅拌20分钟后,继续加入HDI预聚物55份、季铵碱催化剂0.1份、消泡剂0.1份和助剂0.5份,高速搅拌20分钟;
S3:再将步骤S2中得到的物质中加入改性纳米氧化钇0.3份继续进行超声搅拌,超声搅拌10分钟停机出料,得到水性面漆固化剂。
实施例2:
一种高光泽度耐黄变的环保型水性面漆固化剂的制备工艺,包括以下步骤:
S1:将去离子水35份加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂0.25份、分散剂0.35份、润湿剂0.35份、消泡剂0.25份和高岭土9份依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素0.5份,高速搅拌20min后再将0.5份AMP-95与去离子水混合后加入,搅拌20分钟后,继续加入HDI预聚物60份、季铵碱催化剂0.2份、消泡剂0.1份和助剂0.6份,高速搅拌20分钟;
S3:再将步骤S2中得到的物质中加入改性纳米氧化钇0.25份继续进行超声搅拌,超声搅拌10分钟停机出料,得到水性面漆固化剂。
实施例3:
一种高光泽度耐黄变的环保型水性面漆固化剂的制备工艺,包括以下步骤:
S1:将去离子水30份加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂0.22份、分散剂0.33份、润湿剂0.33份、消泡剂0.22份和高岭土8.5份依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素0.45份,高速搅拌20min后再将0.45份AMP-95与水混合后加入,搅拌20分钟后,继续加入HDI预聚物58份、季铵碱催化剂0.15份、消泡剂0.05份和助剂0.6份,高速搅拌20分钟;
S3:再将步骤S2中得到的物质中加入改性纳米氧化钇0.28份继续进行超声搅拌,超声搅拌10分钟停机出料,得到水性面漆固化剂。
对照组1
S1:将去离子水25份加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂0.2份、分散剂0.3份、润湿剂0.3份、消泡剂0.2份和高岭土8份依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素0.4份,高速搅拌20min后再将0.4份AMP-95与水混合后加入,搅拌20分钟后,继续加入HDI预聚物55份、消泡剂0.1份,高速搅拌20分钟停机出料,得到水性面漆固化剂。
耐黄变测试:先用色差仪测试没有经过强光照与高温条件下固化薄膜的黄度值作为初始值,当经历了6h持续高温80C与紫外光强30mW/cm2后,再使用色差仪测量所有样品薄膜的黄度值,取前后变化的差值作为黄变指数。
表1实施例与对照组固化剂性能检测数据表
序号 | 耐黄变指数 | 光泽度 | 附着力 | 铅笔硬度 | 柔韧性 |
实施例1 | 7.31 | 80GU | 5B | 4H | 3 |
实施例2 | 6.45 | 85GU | 5B | 4H | 3 |
实施例3 | 6.87 | 83GU | 5B | 3H | 3 |
对照组1 | 34.25 | 71GU | 4B | B | 5 |
由表1可以看出,实施例1-3中黄变指数很低,几乎没有出现黄变,光泽度达到了高光漆的标准,铅笔硬度明显高于对照组1,但柔韧性较低,这是由于添加了改性纳米氧化钇之后,硬度提高的同时,自身柔韧性会受到限制因此,所提适当的添加改性纳米氧化钇。
Claims (6)
1.一种高光泽度耐黄变的环保型水性面漆固化剂,其特征在于:其各组分按重量份计包括:HDI预聚物55-60份、季铵碱催化剂0.1-0.2份、AMP-95为0.4-0.5份、防腐剂0.2-0.25份、分散剂0.3-0.35份、润湿剂0.3-0.35份、消泡剂0.2-0.25份、高岭土8-9份、羟乙基纤维素0.4-0.5份、去离子水25-35份、助剂0.5-0.7份、改性纳米氧化钇0.25-0.3份。
2.根据权利要求1所述的一种高光泽度耐黄变的环保型水性面漆固化剂,其特征在于:所述季铵碱催化剂为β-羟丙基季氨碱。
3.根据权利要求2所述的一种高光泽度耐黄变的环保型水性面漆固化剂,其特征在于:所述β-羟丙基季氨碱通过以下步骤制备:在氮气的保护下,将20-30g的环氧丙烷在1h内滴加到60-70g的三乙胺和10-15g水的体系中,维持体系温度为30℃,待环氧丙烷滴加完毕,连续搅拌12h,停止反应后,用旋转蒸发仪分离出下层黄色液体,得到β-羟丙基季氨碱。
4.根据权利要求1所述的一种高光泽度耐黄变的环保型水性面漆固化剂,其特征在于:所述改性纳米氧化钇通过以下步骤进行制备:取适量的硅烷偶联剂滴加溶于一定量的乙醇溶液,并调节溶液酸碱度,然后进行超声分散5min使其混合均匀,再静止一定时间进行水解,接着往溶液中加入氧化钇纳米颗粒,在恒温条件下进行搅拌,反应结束后离心洗涤干燥得到改性纳米氧化钇。
5.根据权利要求1所述的一种高光泽度耐黄变的环保型水性面漆固化剂,其特征在于:所述助剂包括次亚磷酸脂、亚磷酸钠、亚磷酸三苯酯、季戊四醇、三烷基亚磷酸酯中的一种或两种两种以上。
6.一种高光泽度耐黄变的环保型水性面漆固化剂的制备工艺,其特征在于:包括以下步骤:
S1:将去离子水加入拉缸中,打开加速搅拌器进行搅拌,再将防腐剂、分散剂、润湿剂、消泡剂和高岭土依次投入到拉缸中,高速搅拌30min;
S2:再加入羟乙基纤维素,高速搅拌20min后再将AMP-95混合后加入,搅拌20分钟后,继续加入HDI预聚物、季铵碱催化剂、消泡剂和助剂,高速搅拌20分钟;
S3:再将步骤S2中得到的物质中加入改性纳米氧化钇继续进行超声搅拌,超声搅拌10分钟停机出料,得到水性面漆固化剂。
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