CN116926992B - 一种防水、防油、阻隔气体的涂料及其制备方法和包装纸 - Google Patents
一种防水、防油、阻隔气体的涂料及其制备方法和包装纸 Download PDFInfo
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Abstract
本发明属于涂料技术领域,公开了一种防水、防油、阻隔气体的涂料及其制备方法和包装纸。该涂料,按重量份数计,包括聚合物70份、改性填料60‑80份、助剂1‑10份、溶剂50‑100份;聚合物包括氨基树脂和水性羟基丙烯酸树脂;制备改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇搅拌混合,制得混合物,然后加入聚乙烯醇纤维,搅拌混合,制得改性填料。该涂料形成的涂层的防水、防油、阻隔气体性能,而且还提高涂层的抗折或断裂性能。
Description
技术领域
本发明属于涂料技术领域,特别涉及一种防水、防油、阻隔气体的涂料及其制备方法和包装纸。
背景技术
现有技术中的涂料种类很多,应用的领域也有很多,例如应用于金属防腐领域的涂料、建筑领域的涂料、家具领域的涂料,以及包装纸领域的涂料。
其中,包装纸领域的涂料发展较晚,技术还不太成熟。随着人们环保意识的增强,传统上应用于食品包装纸表面的防水、防油、阻隔气体的塑料膜逐渐被涂料涂层取代。然而,现有的,具有防水、防油、阻隔气体的涂料涂层的防水、防油、阻隔气体的性能相对较差,这不利于食品包装纸的应用。
而且,包装纸表面涂层也需要具有一定的力学韧度,韧度太差,容易撕裂或断裂,这也不利于食品包装纸的应用。
因此,亟需提供一种防水、防油、阻隔气体的涂料,其形成的涂层不仅具有良好的防水、防油、阻隔气体的性能。
发明内容
本发明旨在至少解决上述现有技术中存在的技术问题之一。为此,本发明提出一种防水、防油、阻隔气体的涂料及其制备方法和包装纸。本发明所述涂料形成的涂层具有良好的防水、防油、阻隔气体性能,将其应用于包装纸表面,可防止或大大减少油的渗透,对水蒸气和氧气的阻隔性能,有助于对食物的保质、保鲜。而且本发明的涂料涂覆在纸表面,形成的涂层具有良好的抗折或断裂性能,涂层耐折性能好,有助于包装纸的正常使用。
本发明的发明构思:本发明所述涂料,利用聚丙烯酸甲酯、聚乙烯醇纤维、油酸钠对纳米硅酸铝、纳米硅酸镁、纳米氧化钇进行改性,使得纳米硅酸铝、纳米硅酸镁、纳米氧化钇均匀稳定的分散于氨基树脂和水性羟基丙烯酸树脂体系中,而且聚乙烯醇纤维的引入,不仅有利于纳米硅酸铝、纳米硅酸镁、纳米氧化钇无机颗粒的稳定分散,而且有助于网状涂层的形成(本发明特定比例的氨基树脂和水性羟基丙烯酸树脂体系,以及改性的填料体系,有助于聚乙烯醇纤维的均匀分散),从而显著提升涂料形成的涂层的防水、防油、阻隔气体性能,而且还提高涂层的抗折或断裂性能。
本发明的第一方面提供一种防水、防油、阻隔气体的涂料。
具体的,一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料60-80份、助剂1-10份、溶剂50-100份;
所述聚合物包括氨基树脂和水性羟基丙烯酸树脂;
制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇搅拌混合,制得混合物,然后加入聚乙烯醇纤维,搅拌混合,制得所述改性填料。
优选的,所述氨基树脂和水性羟基丙烯酸树脂的重量比为100:(20-40);进一步优选的,所述氨基树脂和水性羟基丙烯酸树脂的重量比为100:(25-35)。
优选的,所述聚乙烯醇纤维的长度为6-10mm,直径为500-700nm;进一步优选的,所述聚乙烯醇纤维的长度为6-7mm,直径为500-550nm。
优选的,制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(8-20):(1-5):(2-8):(40-80):(10-20)的比例搅拌混合,制得混合物,然后加入聚乙烯醇纤维,搅拌混合,所述混合物与聚乙烯醇纤维的重量比为100:(1-10),制得所述改性填料。
优选的,制备所述改性填料的过程中,在加入聚乙烯醇纤维时,还加入油酸钠。油酸钠有利于改性后的纳米硅酸铝、纳米硅酸镁、纳米氧化钇与聚乙烯醇纤维的相容性、分散均匀性的提高,从而进一步提升涂料形成的涂层的防水、防油、阻隔气体性能。
优选的,所述油酸钠与聚乙烯醇纤维的重量比为(5-12):(1-10)。
进一步优选的,制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(10-15):(2-4):(2-5):(40-70):(10-15)的比例在800-1000转/分钟的搅拌速度下,搅拌混合30-60分钟,制得混合物,然后加入聚乙烯醇纤维、油酸钠,在1500-2500转/分钟的搅拌速度,50-70℃下,搅拌混合60-120分钟,所述混合物与聚乙烯醇纤维、油酸钠的重量比为100:(2-8):(5-12),制得所述改性填料。
优选的,所述助剂包括六亚甲基二异氰酸酯、二乙烯三胺、三乙烯四胺、亚甲基双甲基苯磺酸钠、聚二甲基硅氧烷。
优选的,所述助剂中,按重量份数计,包括六亚甲基二异氰酸酯0.5-1份、二乙烯三胺0.2-0.6份、三乙烯四胺0.2-0.7份、亚甲基双甲基苯磺酸钠0.5-1份、聚二甲基硅氧烷1-5份。
优选的,所述溶剂为水。
优选的,一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料65-80份、助剂2-10份、溶剂50-100份;
所述聚合物包括氨基树脂和水性羟基丙烯酸树脂;
制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(10-15):(2-4):(2-5):(40-70):(10-15)的比例在800-1000转/分钟的搅拌速度下,搅拌混合30-60分钟,制得混合物,然后加入聚乙烯醇纤维、油酸钠,在1500-2500转/分钟的搅拌速度,50-70℃下,搅拌混合60-120分钟,所述混合物与聚乙烯醇纤维、油酸钠的重量比为100:(2-8):(5-12),制得所述改性填料。
进一步优选的,一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料65-80份、助剂2.4-8.3份、溶剂50-100份;
所述聚合物包括氨基树脂和水性羟基丙烯酸树脂;
所述助剂中,按重量份数计,包括六亚甲基二异氰酸酯0.5-1份、二乙烯三胺0.2-0.6份、三乙烯四胺0.2-0.7份、亚甲基双甲基苯磺酸钠0.5-1份、聚二甲基硅氧烷1-5份;
制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(10-15):(2-4):(2-5):(40-70):(10-15)的比例在800-1000转/分钟的搅拌速度下,搅拌混合30-60分钟,制得混合物,然后加入聚乙烯醇纤维、油酸钠,在1500-2500转/分钟的搅拌速度,50-70℃下,搅拌混合60-120分钟,所述混合物与聚乙烯醇纤维、油酸钠的重量比为100:(2-8):(5-12),制得所述改性填料。
本发明的第二方面提供一种防水、防油、阻隔气体的涂料的制备方法。
具体的,一种防水、防油、阻隔气体的涂料的制备方法,包括以下步骤:
将各原料组分混合,制得所述涂料。
优选的,所述制备方法,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,然后加入助剂,混合,制得所述涂料。
本发明的第三方面提供一种包装纸。
一种包装纸,包括纸基材,以及涂覆在纸基材表面的涂料形成的涂层。
一种包装纸的制备方法,包括以下步骤:
取纸基材,然后将上述涂料涂覆在纸基材,干燥固化,形成所述包装纸。
优选的,所述涂料在纸基材表面的涂覆量为2-20g/m2;进一步优选的,所述涂料在纸基材表面的涂覆量为8-15g/m2。
优选的,所述干燥固化的温度为80-160℃,干燥固化的时间为1-8分钟。
所述纸基材无特殊要求,可为市售常见的纸,或者通过现有技术记载的方法获得。
优选的,所述包装纸为食品包装纸。可用于包装油腻食品或对水、氧气比较敏感的食品。
相对于现有技术,本发明的有益效果如下:
(1)本发明所述涂料,利用聚丙烯酸甲酯、聚乙烯醇纤维、油酸钠对纳米硅酸铝、纳米硅酸镁、纳米氧化钇进行改性,使得使得纳米硅酸铝、纳米硅酸镁、纳米氧化钇均匀稳定的分散于氨基树脂和水性羟基丙烯酸树脂体系中,而且聚乙烯醇纤维的引入,不仅有利于纳米硅酸铝、纳米硅酸镁、纳米氧化钇无机颗粒的稳定分散,而且有助于网状涂层的形成,从而显著提升涂料形成的涂层的防水、防油、阻隔气体性能,而且还提高涂层的抗折或断裂性能。本发明涂料中各组分的特定比例,对提高涂料涂层性能有重要作用。
(2)制备所述改性填料的过程中,在加入聚乙烯醇纤维时,还加入油酸钠。油酸钠有利于改性后的纳米硅酸铝、纳米硅酸镁、纳米氧化钇与聚乙烯醇纤维的相容性、分散均匀性的提高,从而进一步提升涂料形成的涂层的防水、防油、阻隔气体性能。
具体实施方式
为了让本领域技术人员更加清楚明白本发明所述技术方案,现列举以下实施例进行说明。需要指出的是,以下实施例对本发明要求的保护范围不构成限制作用。
以下实施例中所用的原料、试剂或装置如无特殊说明,均可从常规商业途径得到,或者可以通过现有已知方法得到。
实施例1:防水、防油、阻隔气体的涂料的制备
一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料70份、助剂5份、溶剂(水)80份;
聚合物由氨基树脂和水性羟基丙烯酸树脂构成,氨基树脂与水性羟基丙烯酸树脂的重量比为100:25;
助剂中,六亚甲基二异氰酸酯为0.5份、二乙烯三胺为0.2份、三乙烯四胺为0.2份、亚甲基双甲基苯磺酸钠为0.8份、聚二甲基硅氧烷为3.3份;
制备改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:12:4:2:50:10的比例在800转/分钟的搅拌速度下,搅拌混合40分钟,制得混合物,然后加入聚乙烯醇纤维(长度为6-6.5mm,直径为500-520nm),在1500转/分钟的搅拌速度,50℃下,搅拌混合100分钟,混合物与聚乙烯醇纤维的重量比为100:5,制得改性填料。
一种防水、防油、阻隔气体的涂料的制备方法,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,搅拌混合的搅拌速度为500转/分钟,搅拌混合的时间为30分钟,然后加入助剂,混合,制得涂料。
实施例2:防水、防油、阻隔气体的涂料的制备
一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料75份、助剂6份、溶剂(水)90份;
聚合物由氨基树脂和水性羟基丙烯酸树脂构成,氨基树脂与水性羟基丙烯酸树脂的重量比为100:30;
助剂中,六亚甲基二异氰酸酯为0.7份、二乙烯三胺为0.2份、三乙烯四胺为0.2份、亚甲基双甲基苯磺酸钠为1.6份、聚二甲基硅氧烷为3.3份;
制备改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:14:3:5:45:12的比例在900转/分钟的搅拌速度下,搅拌混合45分钟,制得混合物,然后加入聚乙烯醇纤维(长度为6-7mm,直径为500-550nm),在1400转/分钟的搅拌速度,65℃下,搅拌混合110分钟,混合物与聚乙烯醇纤维的重量比为100:3,制得改性填料。
一种防水、防油、阻隔气体的涂料的制备方法,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,搅拌混合的搅拌速度为800转/分钟,搅拌混合的时间为30分钟,然后加入助剂,混合,制得涂料。
实施例3:防水、防油、阻隔气体的涂料的制备
一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料78份、助剂7份、溶剂(水)90份;
聚合物由氨基树脂和水性羟基丙烯酸树脂构成,氨基树脂与水性羟基丙烯酸树脂的重量比为100:30;
助剂中,六亚甲基二异氰酸酯为0.9份、二乙烯三胺为0.5份、三乙烯四胺为0.2份、亚甲基双甲基苯磺酸钠为1.6份、聚二甲基硅氧烷为3.8份;
制备改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:10:3:4:40:10的比例在900转/分钟的搅拌速度下,搅拌混合45分钟,制得混合物,然后加入聚乙烯醇纤维(长度为6-7.5mm,直径为500-550nm),在1400转/分钟的搅拌速度,60℃下,搅拌混合110分钟,混合物与聚乙烯醇纤维的重量比为100:3,制得改性填料。
一种防水、防油、阻隔气体的涂料的制备方法,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,搅拌混合的搅拌速度为800转/分钟,搅拌混合的时间为30分钟,然后加入助剂,混合,制得涂料。
实施例4:防水、防油、阻隔气体的涂料的制备
一种防水、防油、阻隔气体的涂料,按重量份数计,包括聚合物70份、改性填料70份、助剂5份、溶剂(水)80份;
聚合物由氨基树脂和水性羟基丙烯酸树脂构成,氨基树脂与水性羟基丙烯酸树脂的重量比为100:25;
助剂中,六亚甲基二异氰酸酯为0.5份、二乙烯三胺为0.2份、三乙烯四胺为0.2份、亚甲基双甲基苯磺酸钠为0.8份、聚二甲基硅氧烷为3.3份;
制备改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:12:4:2:50:10的比例在800转/分钟的搅拌速度下,搅拌混合40分钟,制得混合物,然后加入聚乙烯醇纤维(长度为6-6.5mm,直径为500-520nm)、油酸钠,在1500转/分钟的搅拌速度,65℃下,搅拌混合100分钟,混合物与聚乙烯醇纤维、油酸钠的重量比为100:5:10,制得改性填料。
一种防水、防油、阻隔气体的涂料的制备方法,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,搅拌混合的搅拌速度为500转/分钟,搅拌混合的时间为30分钟,然后加入助剂,混合,制得涂料。
对比例1
与实施例1相比,对比例1的区别仅在于,对比例1直接将等量的纳米硅酸铝、纳米硅酸镁、纳米氧化钇与聚合物、溶剂搅拌混合,然后加入助剂来制备涂料。即对比例1中的填料不进行改性处理,其他过程与实施例1相同。
对比例2
与实施例1相比,对比例2的区别仅在于,用等量的氨基树脂代替水性羟基丙烯酸树脂,其余过程与实施例1相同。
对比例3
与实施例1相比,对比例2的区别仅在于,在改性填料的制备过程中,对比例2用等量的纳米硅酸铝代替纳米氧化钇,用等量的聚乙酸乙烯酯代替聚丙烯酸甲酯,其余过程与实施例1相同。
对比例4
与实施例1相比,对比例4的区别仅在于,在填料的改性过程中,用等量的碳纤维代替聚乙烯醇纤维,其余过程与实施例1相同。
应用例
取实施例1、实施例4、对比例1-4制备的涂料,分别按照以下方法制备包装纸。
一种包装纸,包括纸基材,以及涂覆在纸基材表面的涂料形成的涂层。
上述包装纸的制备方法,包括以下步骤:
取纸基材,然后将上述涂料涂覆在纸基材(纸基材按照专利CN112900149B实施例1中S1和S2步骤制备)表面,涂料在纸基材表面的涂覆量为18g/m2,干燥固化,干燥固化的温度为110℃,干燥固化的时间为7分钟,形成包装纸。
产品效果测试
1.防水、防油、阻隔气体性能测试
取利用上述实施例1、实施例4、对比例1-3制备的涂料所制得的包装纸,在25℃,相对湿度为80%下,24小时、48小时,测试各包装纸的氧气透过量、水蒸气透过量。抗油性能测试,是将各待测的包装纸制成杯状,在杯中装大豆油,分别在0℃和50℃下各静置12小时,并循环5次,观察白卡纸是否被油渗透(渗透等级分为:明显渗透、少量渗透、看不到渗透三个等级),结果如表1所示。
表1
注:表1中的“-”表示未测试。由于对比例1-3对应的包装纸在24小时时的氧气透过量和水蒸气透过量已经明显高于实施例,因此对比例1-3对应的包装纸在48小时时的氧气透过量和水蒸气透过量已经无测试的必要性,故没有进行测试。
从表1可以看出,本发明实施例1、实施例4对应的包装纸,对氧气、水蒸气、油都具有良好的阻隔性能,性能明显优于对比例1-3。由此可以看出,树脂种类以及填料的改性方法,对涂料涂层的性能存在显著影响。且从实施例1和实施例4的结果可以看出,油酸钠的加入,有助于提升涂层对氧气、水蒸气、油的阻隔效果。
2.抗折性能测试
取实施例1、对比例4对应的包装纸,分别进行对折,观察包装纸表面涂层断裂时所需的对折次数,结果如表2所示。
表2
实施例1 | 对比例4 | |
断裂时所需的对折次数 | 28 | 20 |
从表2可以看出,采用本发明填料改性方法,制得的涂料在纸基材表面形成的涂层具有更好的耐折性能。也表明本发明填料的改性方法,聚乙烯醇纤维具有更好的相容性和分散均匀性,从而提高包装纸的耐折性能。
本发明其他实施例与实施例1效果类似。
Claims (7)
1.一种防水、防油、阻隔气体的涂料,其特征在于,按重量份数计,由以下组分构成:聚合物70份、改性填料60-80份、助剂1-10份、溶剂50-100份;
所述聚合物为氨基树脂和水性羟基丙烯酸树脂;
制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(8-20):(1-5):(2-8):(40-80):(10-20)的比例搅拌混合,制得混合物,然后加入聚乙烯醇纤维,搅拌混合,所述混合物与聚乙烯醇纤维的重量比为100:(1-10),制得所述改性填料;
所述氨基树脂和水性羟基丙烯酸树脂的重量比为100:(20-40);
所述助剂中,按重量份数计,包括六亚甲基二异氰酸酯0.5-1份、二乙烯三胺0.2-0.6份、三乙烯四胺0.2-0.7份、亚甲基双甲基苯磺酸钠0.5-1份、聚二甲基硅氧烷1-5份。
2.根据权利要求1所述的涂料,其特征在于,制备所述改性填料的过程中,在加入聚乙烯醇纤维时,还加入油酸钠。
3.根据权利要求2所述的涂料,其特征在于,制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(10-15):(2-4):(2-5):(40-70):(10-15)的比例在800-1000转/分钟的搅拌速度下,搅拌混合30-60分钟,制得混合物,然后加入聚乙烯醇纤维、油酸钠,在1500-2500转/分钟的搅拌速度,50-70℃下,搅拌混合60-120分钟,所述混合物与聚乙烯醇纤维、油酸钠的重量比为100:(2-8):(5-12),制得所述改性填料。
4.根据权利要求1所述的涂料,其特征在于,按重量份数计,包括聚合物70份、改性填料65-80份、助剂2-10份、溶剂50-100份;
所述聚合物为氨基树脂和水性羟基丙烯酸树脂;
制备所述改性填料的过程包括:将纳米硅酸铝、纳米硅酸镁、纳米氧化钇、聚丙烯酸甲酯、水、丙三醇按照重量比为10:(10-15):(2-4):(2-5):(40-70):(10-15)的比例在800-1000转/分钟的搅拌速度下,搅拌混合30-60分钟,制得混合物,然后加入聚乙烯醇纤维、油酸钠,在1500-2500转/分钟的搅拌速度,50-70℃下,搅拌混合60-120分钟,所述混合物与聚乙烯醇纤维、油酸钠的重量比为100:(2-8):(5-12),制得所述改性填料。
5.权利要求1-4任一项所述的涂料的制备方法,其特征在于,包括以下步骤:
将各原料组分混合,制得所述涂料。
6.根据权利要求5所述的制备方法,其特征在于,包括以下步骤:
将聚合物、改性填料、溶剂搅拌混合,然后加入助剂,混合,制得所述涂料。
7.一种包装纸,其特征在于,包括纸基材,以及涂覆在所述纸基材表面的权利要求1-4任一项所述的涂料形成的涂层。
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