CN106046975A - 水性抗裂涂料及其制备方法 - Google Patents
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Abstract
本发明公开了一种水性抗裂涂料及其制备方法,按照重量份数计包括下列组分:按照重量份数计包括下列组分:乳液、助溶剂、水、抗裂填料、固化剂、消泡剂;其中,相对于600份乳液,助溶剂70‑80份,水40‑45份,抗裂填料165‑170份,固化剂5‑10份,消泡剂3‑5份。该水性抗裂涂料用于墙体装饰,不易出现褪色、脱落和龟裂等现象。
Description
技术领域
本发明涉及涂料领域,具体地,涉及一种水性抗裂涂料及其制备方法。
背景技术
涂料是涂覆在被保护或被装饰的物体表面,并能与被涂物形成牢固附着的连续薄膜,通常是以树脂、或油、或乳液为主,添加或不添加颜料、填料,添加相应助剂,用有机溶剂或水配制而成的粘稠液体。
传统涂料的溶剂都是有机溶剂,其有机溶剂中含有苯及其化合物。苯是一种无色易挥发的具有特殊芳香的液体,苯化合物已经被世界卫生组织确定为强烈致癌物质。
随着消费者的健康、环保意识的增强,对墙体装饰涂料的要求也逐渐提高,因此出现了水性漆的概念;凡是用水作溶剂或者作分散介质的涂料,都可称为水性涂料。但是作为墙体涂料,其功能是要起到装饰作用的同时还要能实现防水、抗冻抗裂等效果。
发明内容
本发明的目的是提供一种水性抗裂涂料及其制备方法,在制备所述水性抗裂涂料的过程中加入了方解石粉或羟丙基甲基纤维素等抗裂剂。通过该方法制备的水性抗裂涂料具有很好的延展性,膜连续性强,且该水性抗裂涂料易洗刷清洁,成膜不易脱落抗裂性能优良。
为了实现上述目的,本发明提供了一种水性抗裂涂料,按照重量份数计包括下列组分:乳液、助溶剂、水、抗裂填料、固化剂、消泡剂;其中,相对于600份所述乳液,所述助溶剂70-80份,所述水40-45份,所述抗裂填料165-170份,所述固化剂5-10份,所述消泡剂3-5份。
本发明还提供了所述水性抗裂涂料的制备方法,制备过程中将水作为稀释剂,先将水和助溶剂加入到所述乳液中搅拌得到混合物一,再将抗裂助剂加入到混合物一中搅拌得到混合物二,最后向混合物中加入固化剂和消泡剂搅拌得到所述的水性抗裂涂料。
通过上述技术方案,本发明提供的制备方法中选择水作为稀释剂,加入了乙二醇乙醚或丙二醇醚作为助溶剂可以提高乳液在水中的分散效果,以水为分散剂,可以避免有机溶剂的挥发带来的环境污染;另外,本发明中还添加了方解石粉或羟丙基甲基纤维素等作为抗裂填料,明显提高了涂料的抗龟裂性能。
本发明的其他特征和优点将在随后的具体实施方式部分予以详细说明。
具体实施方式
以下对本发明的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。
本发明提供的水性抗裂涂料,按照重量份数计包括下列组分按照重量份数计包括下列组分:乳液、助溶剂、水、抗裂填料、固化剂、消泡剂;
其中,相对于600份所述乳液,所述助溶剂70-80份,所述水40-45份,所述抗裂填料165-170份,所述固化剂5-10份,所述消泡剂3-5份。
在上述的水性抗裂涂料中,所用乳液的种类可以在宽的范围内选择,但是为了进一步提高乳液在水中的分散效果,优选地,所用乳液选自聚酯酸乙烯乳液、醋丙乳液、苯丙乳液、纯丙乳液、硅丙乳液和水性环氧树脂中的一种或多种。
在上述的水性抗裂涂料中,为了进一步提高乳液在水中的分散性,添加助溶剂,优选地,助溶剂选自乙二醇乙醚或丙二醇醚。
在上述的水性抗裂涂料中,为了提高涂料的抗龟裂性能,添加了抗裂填料,优选地,抗裂填料选自方解石粉或羟丙基甲基纤维素。
在上述的水性抗裂涂料中,为了进一步增强所述水性抗裂涂料的成膜效果,添加了固化剂和消泡剂,优选地,所用固化剂为醇脂十二或2-甲基咪唑;所用消泡剂为乳化硅油、高碳醇脂肪酸酯复合物或氧乙烯聚氧丙醇胺醚。
本发明还提供了上述的水性抗裂涂料的制备方法:先将水和助溶剂加入到乳液中搅拌得到混合物一,再将抗裂填料加入到所述混合物一中搅拌得到混合物二,最后向所述混合物二中加入固化剂和消泡剂搅拌得到所述的水性抗裂涂料。
在上述的制备方法中,制备所述混合物一和所述混合物二均采用搅拌的方式,其中对所述搅拌的温度和搅拌的转速没有特别的限定,但是从制备所述水性抗裂涂料的制备率和操作过程的节能方面考虑,优选地,所述搅拌的温度为20-35℃,搅拌的转速为1000-2000rpm。为了更进一步地使涂料各组分能够通过搅拌充分混合,优选地,搅拌的时间为20-50min。
实施例1
在25℃情况下,转速选择1200rpm,按照重量份计数,将先将水40份和乙二醇乙醚70份加入到聚酯酸乙烯乳液、醋丙乳液共600份中搅拌20min得到混合物一,再将方解石粉165份加入到所述混合物一中搅拌30min得到混合物二,最后向所述混合物二中加入醇脂十二5份和乳化硅油3份搅拌得到所述的水性抗裂涂料A1。
实施例2
在30℃情况下,转速选择1500rpm,按照重量份计数,将先将水45份和丙二醇醚80份加入到苯丙乳液、纯丙乳液共600份中搅拌40min得到混合物一,再将羟丙基甲基纤维素170份加入到所述混合物一中搅拌50min得到混合物二,最后向所述混合物二中加入2-甲基咪唑10份和高碳醇脂肪酸酯复合物5份搅拌得到所述的水性抗裂涂料A2。
实施例3
在35℃情况下,转速选择1800rpm,按照重量份计数,将先将水43份和丙二醇醚75份加入到硅丙乳液、水性环氧树脂共600份中搅拌30min得到混合物一,再将羟丙基甲基纤维素168份加入到所述混合物一中搅拌40min得到混合物二,最后向所述混合物二中加入2-甲基咪唑8份和聚氧乙烯聚氧丙醇胺醚4份搅拌得到所述的水性抗裂涂料A3。
对比例1
参照实施例1制备涂料B1,所不同的是未加入抗裂填料。
对比例2
参照实施例2制备涂料B2,所不同的是加入羟丙基甲基纤维素重量份为100份。
对比例3
参照实施例3制备涂料B3,所不同的是加入羟丙基甲基纤维素重量份为180份。
检测例1
抗裂性能测试如下:
首先,将所制备的涂料A1-A3和B1-B3制成对应的涂料样板涂层,25℃干燥24h后,一起放入到60℃的烘箱中加热24h,观察所述涂层样板涂料的龟裂程度。龟裂程度由低到高表示为1-10级。另外,为了进一步对比表征本发明提供的洁净室内墙涂料的性能,本实施例中还选取了普通涂料(立邦内墙乳胶漆)经过同一处理制得涂层。
以上各实施例以及对比例制备的涂料抗龟裂性能测试结果如表1所示:
表1
通过上述抗裂性能测试的结果显示,本发明提供的水性抗裂涂料在60℃下的龟裂程度最低为3级,属于抗龟裂效果效果较好的涂料。当对比例1中未加入方解石粉和羟丙基甲基纤维素制备得到的涂料B1的龟裂程度达到9级,明显易龟裂,抗裂效果非常差。在实施例1-3中,加入的抗裂填料重量份为170份时,涂料的龟裂程度只有3级,而当所述抗裂填料重量份为在165-168份之间时涂料的龟裂程度也在5级以下,均属于抗裂效果较好。当抗裂填料的重量份只有100份时,涂料的龟裂程度则上升到5级以上,属于易龟裂涂料;另外,当抗裂填料重量份为180时涂料的龟裂程度为3级,与重量份为170份时抗裂效果没有发生明显提高,所以本发明优选地抗裂填料重量份选择165-170份。
以上详细描述了本发明的优选实施方式,但是,本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种简单变型,这些简单变型均属于本发明的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本发明对各种可能的组合方式不再另行说明。
此外,本发明的各种不同的实施方式之间也可以进行任意组合,只要其不违背本发明的思想,其同样应当视为本发明所公开的内容。
Claims (9)
1.一种水性抗裂涂料,其特征在于,按照重量份数计包括下列组分:乳液、助溶剂、水、抗裂填料、固化剂、消泡剂;
其中,相对于600份所述乳液,所述助溶剂70-80份,所述水40-45份,所述抗裂填料165-170份,所述固化剂5-10份,所述消泡剂3-5份。
2.根据权利要求1所述的水性抗裂涂料,其中,所述的乳液为选自聚酯酸乙烯乳液、醋丙乳液、苯丙乳液、纯丙乳液、硅丙乳液和水性环氧树脂中的一种或多种。
3.根据权利要求1所述的水性抗裂涂料,其中,所述的助溶剂选自乙二醇乙醚或丙二醇醚。
4.根据权利要求1所述的为水性抗裂涂料,其中,所述的抗裂填料选自方解石粉或羟丙基甲基纤维素。
5.根据权利要求1所述的水性抗裂涂料,其中,所述的所述的固化剂为醇脂十二或2-甲基咪唑;所述的消泡剂为乳化硅油、高碳醇脂肪酸酯复合物、或聚氧乙烯聚氧丙醇胺醚。
6.权利要求1-5任一项所述的水性抗裂涂料的制备方法,其特征在于,水作为稀释剂,先将水和助溶剂加入到所述乳液中搅拌得到混合物一,再将抗裂助剂加入到混合物一中搅拌得到混合物二,最后向混合物中加入助剂搅拌得到所述的水性抗裂涂料。
7.根据权利要求1所述的水性抗裂涂料的制备方法,其中,制备所述混合物一得过程中,搅拌的时间为20-50min,温度为20-35℃。
8.根据权利要求1所述的水性抗裂涂料的制备方法,其中,制备所述混合物二得过程中,搅拌的时间为20-50min,温度为20-35℃。
9.根据权利要求7或8中的任一项所述的水性抗裂涂料的制备方法,其中,所述搅拌的转速在1000-2000rpm之间。
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