CN111234579B - 一种薄型高漫反射涂料及其制备方法 - Google Patents
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Abstract
本发明公开了一种薄型高漫反射涂料及其制备方法,所述涂料包括以下重量份数的各组分:水性羟基树脂25‑45份,水性氨基树脂6‑10份,分散剂0.4‑2份,消泡剂0.2‑1份,钛白粉20‑40份,纳米消光粉料5‑10份,光学添加剂0.1‑0.5份,增稠剂0.2‑1份,防腐剂0.1‑0.5份,水12‑30份。本发明采用特殊的水性烤漆体系作为粘结料,制备的涂料安全环保、耐水240小时无异常、氙灯老化2000小时不粉化,反射性能不下降、可在200度环境下使用、膜厚45微米时在550nm处的反射率达到95%。将该涂料用于铝卷的连续涂装生产,后期冲压成型用于灯罩及其它特殊反射领域使用,具有广阔的使用前景。
Description
技术领域
本发明涉及功能材料技术领域,具体涉及一种薄型高漫反射涂料及其制备方法。
背景技术
目前,市场上的漫反射涂料有些以聚乙烯醇作为粘结料,虽环保但不耐水,只能用于室内且耐久性差;有些以丙烯酸乳液作为粘结料,耐水性和耐候性尚可但不耐高温,只能用于要求较低的场合;有些以溶剂型含硅的烤漆体系作为粘结料,耐水性、耐候性和耐温性都可以,但不环保。总体上还存在需要较厚的涂层才能达到较理想的反射率。
如专利文献CN103740199A中提供了一种高漫反射涂料,包括以下组分:合成树脂30-40%;钛白粉45-55%;消光粉5-15%;填料0-5%;分散剂0.5-5%;流平剂0-3%。该高漫反射涂料具有良好的耐高温性、耐黄变性、硬度、附着力强,长期使用后仍能保持较高的反光率,且高温条件下不易变色。但该涂料没有明确其测试的反射率是基于多少膜厚的结果,且根据其方法制备时,所得膜在45微米下的反射率较低,均未达到90%。
发明内容
为解决现有漫反射涂料的不足,本发明提供一种薄型高漫反射涂料及其制备方法,所述涂料具有水性安全环保、耐高温、耐水、耐候及薄涂时具有高漫反射率等特点。
本发明的目的是通过以下技术方案实现的:
本发明提供了一种薄型高漫反射涂料,包括以下重量百分含量的各组分:
优选地,所述水性羟基树脂为水性羟基聚酯树脂、水性羟基丙烯酸树脂、水性羟基聚氨酯树脂、水性羟基醇酸树脂的一种或几种复配的混合物。
优选地,所述水性氨基树脂为甲醚化三聚氰胺树脂、聚合型部分甲醚化三聚氰胺树脂、聚合型高亚氨基高甲醚化三聚氰胺树脂的一种或几种复配的混合物。
本发明通过含羟基树脂和含氨基树脂中羟基和氨基进行反应,从而才能获得烤漆体系,若采用不含羟基或氨基的相应树脂,则无法实现该反应而得到本发明的涂料。
优选地,所述分散剂为聚丙烯酸钠盐、聚丙烯酸铵盐、聚羧酸钠盐、聚羧酸铵盐的一种或几种复配的混合物。
优选地,所述消泡剂为有机硅消泡剂、矿物油型消泡剂、高级醇的一种或几种的复配混合物。
优选地,所述钛白粉为金红石型钛白粉;具体可选型号为R902、R706等中的一种或几种的复配混合物。
优选地,所述纳米消光粉料为纳米碳酸钙、纳米滑石粉、纳米氧化铝、纳米硫酸钡、纳米二氧化硅的一种或几种的复配混合物。
优选地,所述光学添加剂为4,4'-双(2-磺酸基苯乙烯基)-1,1'-联苯、4,4'-双[(4-苯胺基-6-吗啉基-1,3,5-三嗪-2-基)氨基]二苯乙烯-2,2'-二磺酸二钠盐、苯并恶唑类的一种或几种的复配混合物。通过加入光学添加剂,可提高本发明涂料的反射率。
优选地,所述增稠剂为碱溶胀增稠剂、疏水改性的碱溶胀增稠剂、聚氨酯增稠剂,具体可选型号为RM-8w、RM-2020、TT-935等中的一种或几种的复配混合物;其可调整本发明涂料的粘度,以满足施工要求。
所述防腐剂为CMIT、MIT、BIT中的一种或几种的复配混合物。
本发明还提供了一种薄型高漫反射涂料的制备方法,包括以下步骤:
将各组分按重量百分比称取后,混合,并搅拌均匀,即得所述薄型高漫反射涂料。
与现有技术相比,本发明具有如下有益效果:
本发明采用水性羟基树脂和水性氨基树脂构成的烤漆体系作为粘结料,安全环保、耐水240小时无异常、氙灯老化2000小时不粉化,反射性能不下降、可在200度环境下使用、膜厚45微米时在550nm处的反射率达到95%。将该涂料用于铝卷的连续涂装生产,后期冲压成型用于灯罩及其它特殊反射领域使用,具有广泛的使用前景。
附图说明
通过阅读参照以下附图对非限制性实施例所作的详细描述,本发明的其它特征、目的和优点将会变得更明显:
图1为本发明制备的薄型高漫反射涂料的反射率测试数据曲线图。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明,但不以任何形式限制本发明。应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变化和改进。这些都属于本发明的保护范围。
实施例1
一种薄型高漫反射涂料及其制备方法,包括以下步骤:
(1)预备原料:原料的各组分及其重量份数如下:①水性羟基丙烯酸树脂(型号为MD1245)31份,②聚合型部分甲醚化三聚氰胺树脂(型号为CYMEL 325)8份,③聚丙烯酸钠盐0.5份,④有机硅消泡剂(型号为MOUSSEX S 8044)0.3份,⑤R902钛白粉35份,⑥纳米二氧化硅5份,⑦4,4'-双(2-磺酸基苯乙烯基)-1,1'-联苯0.2份,⑧RM-8w 0.4份,⑨BIT 0.2份,⑩去离子水21份。
(2)制备过程:将组分⑩,④,③,⑦,⑨依次加入反应釜,开动搅拌机,在慢速搅拌下加入组分⑥,⑤,再高速分散20分钟,在慢速搅拌下加入组分②和①,搅拌均匀后加入组分⑧,再搅拌20分钟即得所述涂料。
(3)施工方法:可采用刷涂,喷涂和辊涂,干燥条件为120-180℃干燥5-30分钟。所得涂层厚度为45微米时的反射率如图1所示,由图可见,在550nm处的反射率达到95%。
实施例2
一种薄型高漫反射涂料及其制备方法,包括以下步骤:
(4)预备原料:原料的各组分及其重量份数比如下:①水性羟基聚酯树脂(型号为MD2000)38份,②聚合型部分甲醚化三聚氰胺树脂(型号为CYMEL 325)10份,③聚丙烯酸铵盐0.6份,④有机硅消泡剂(型号为MOUSSEX S 8044)0.3份,⑤R706钛白粉34份,⑥纳米氧化铝6份,⑦4,4'-双(2-磺酸基苯乙烯基)-1,1'-联苯0.2份,⑧RM-8w0.4份,⑨BIT 0.2份,⑩去离子水12份。
(5)制备过程:将⑩,④,③,⑦,⑨依次加入反应釜,开动搅拌机,在慢速搅拌下加入⑥,⑤,再高速分散20分钟,在慢速搅拌下加入②和①,搅拌均匀后加入⑧,再搅拌20分钟即得所述涂料。
施工方法:可采用刷涂,喷涂和辊涂,干燥条件为120-180℃干燥5-30分钟,制得涂层。
实施例3
一种薄型高漫反射涂料及其制备方法,包括以下步骤:
(6)预备原料:原料的各组分及其重量份数如下:①水性羟基聚氨酯树脂(型号为PU488)25份,②甲醚化三聚氰胺树脂(型号为CYMEL 303)10份,③聚丙烯酸铵盐2份,④有机硅消泡剂(型号为MOUSSEX S 8044)0.2份,⑤R706钛白粉40份,⑥纳米氧化铝8份,⑦4,4'-双(2-磺酸基苯乙烯基)-1,1'-联苯0.1份,⑧RM-8w 0.2份,⑨BIT 0.5份,⑩去离子水15份。
(7)制备过程:将⑩,④,③,⑦,⑨依次加入反应釜,开动搅拌机,在慢速搅拌下加入⑥,⑤,再高速分散20分钟,在慢速搅拌下加入②和①,搅拌均匀后加入⑧,再搅拌20分钟即得所述涂料。
施工方法:可采用刷涂,喷涂和辊涂,干燥条件为120-180℃干燥5-30分钟,制得涂层。
实施例4
一种薄型高漫反射涂料及其制备方法,包括以下步骤:
(8)预备原料:原料的各组分及其重量份数如下:①水性羟基醇酸树脂(型号为FX-W6001)45份,②聚合型高亚氨基高甲醚化三聚氰胺树脂(型号为CYMEL 327)6份,③聚丙烯酸铵盐0.4份,④有机硅消泡剂(型号为MOUSSEX S 8044)1份,⑤R706钛白粉20份,⑥纳米氧化铝10份,⑦4,4'-双[(4-苯胺基-6-吗啉基-1,3,5-三嗪-2-基)氨基]二苯乙烯-2,2'-二磺酸二钠盐0.5份,⑧RM-8w 1份,⑨BIT 0.1份,⑩去离子水30份。
(9)制备过程:将⑩,④,③,⑦,⑨依次加入反应釜,开动搅拌机,在慢速搅拌下加入⑥,⑤,再高速分散20分钟,在慢速搅拌下加入②和①,搅拌均匀后加入⑧,再搅拌20分钟即得所述涂料。
施工方法:可采用刷涂,喷涂和辊涂,干燥条件为120-180℃干燥5-30分钟,制得涂层。
对比例1
本对比例与实施例1基本相同,不同之处仅在于:本对比例中采用的水性羟基聚酯树脂含量为35份、聚合型部分甲醚化三聚氰胺树脂含量为4份。
对比例2
本对比例与实施例2基本相同,不同之处仅在于:本对比例中采用的水性羟基聚酯树脂含量为35份、聚合型部分甲醚化三聚氰胺树脂含量为13份。
对比例3
本对比例与实施例1基本相同,不同之处仅在于:本对比例中不添加组分⑦。
对比例4
本对比例与实施例1基本相同,不同之处仅在于:本对比例中不添加组分⑧。
增稠剂组份的作用是调整涂料的粘度,来满足不同的施工要求,例如喷涂,辊涂等要求的粘度是不一样的。本对比例中不添加增稠剂,则导致无法满足后续要求。
效果验证:
1.将上述实施例和对比例的涂料制得的厚度为45微米的涂层进行性能检测,具体检测方法为:
耐水性采用ASTM D870-2015方法测定;
耐老化性能采用GB/T 1865-2009方法测定;
反射率采用分光光度法方法测定。
检测结果如下表所示:
2、以实施1为例形成的不同膜厚涂层的反射率如下:
膜厚,微米 | 反射率,%(550nm处) |
20 | 91.8 |
30 | 93.1 |
40 | 94.8 |
50 | 95.6 |
80 | 96.6 |
150 | 97.5 |
200 | 98.2 |
以上对本发明的具体实施例进行了描述。需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变化或修改,这并不影响本发明的实质内容。在不冲突的情况下,本申请的实施例和实施例中的特征可以任意相互组合。
Claims (7)
1.一种薄型高漫反射涂料,其特征在于,包括以下重量份数的各组分:
水性羟基树脂 25-45份,
水性氨基树脂 6-10份,
分散剂 0.4-2份,
消泡剂 0.2-1份,
钛白粉 20-40份,
纳米消光粉料 5-10份,
光学添加剂 0.1-0.5份,
增稠剂 0.2-1份,
防腐剂 0.1-0.5份,
水 12-30份;
所述水性羟基树脂为水性羟基聚酯树脂、水性羟基丙烯酸树脂、水性羟基聚氨酯树脂的一种或几种复配的混合物;所述水性氨基树脂为甲醚化三聚氰胺树脂,薄型高漫反射涂料当膜厚45微米时在550nm处的反射率达到95%以上;
所述光学添加剂为4,4'-双(2-磺酸基苯乙烯基)-1,1'-联苯、4,4'-双[(4-苯胺基-6-吗啉基-1,3,5-三嗪-2-基)氨基]二苯乙烯-2,2'-二磺酸二钠盐、苯并恶唑类的一种或几种的复配混合物。
2.根据权利要求1所述的薄型高漫反射涂料,其特征在于,所述分散剂为聚羧酸钠盐、聚羧酸铵盐的一种或几种复配的混合物。
3.根据权利要求1所述的薄型高漫反射涂料,其特征在于,所述消泡剂为有机硅消泡剂、矿物油型消泡剂、高级醇的一种或几种的复配混合物。
4.根据权利要求1所述的薄型高漫反射涂料,其特征在于,所述钛白粉为金红石型钛白粉。
5.根据权利要求1所述的薄型高漫反射涂料,其特征在于,所述纳米消光粉料为纳米碳酸钙、纳米滑石粉、纳米氧化铝、纳米硫酸钡、纳米二氧化硅的一种或几种的复配混合物。
6.根据权利要求1所述的薄型高漫反射涂料,其特征在于,所述增稠剂为碱溶胀增稠剂、聚氨酯增稠剂中的一种或多种;
所述防腐剂为CMIT、MIT、BIT中的一种或几种的复配混合物。
7.一种根据权利要求1-6任一项所述的薄型高漫反射涂料的制备方法,其特征在于,包括以下步骤:
将各组分按重量份数称取后,混合,并搅拌均匀,即得所述薄型高漫反射涂料。
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