CN115232524A - 一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法及使用方法 - Google Patents
一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法及使用方法 Download PDFInfo
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Abstract
本申请为申请号为2021106764697的分案申请,提供一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法及使用方法,产品采用自交联与烧结交联方式固化成膜,成膜后涂膜陶瓷化,通过烧结交联可以大幅度降低油漆成本,降低对树脂性能的要求,可以制备低成本超耐高温涂料,使用时采用自交联和烧结交联,成膜后涂膜陶瓷化,先预加热至80‑150℃,再升温至500‑850℃进行烧结,使分散的单颗粒树脂熔融、扩散、烧结为密实整体,涂料固化后可长效耐高温500℃‑850℃,产品耐热性能优异,基材附着力好,硬度高,耐磨性能优异,防腐蚀耐候性能好,可广泛应用于汽车、摩托车、拖拉机等车辆排气管、火力发电厂烟囱、加热电器、航天军工等领域。
Description
本申请为分案申请,原申请的申请号为2021106764697,申请日为2021年6月18日,发明专利名称为:一种自交联及烧结交联制备低成本彩色水性超耐高温涂料及其制备方法和使用方法。
技术领域
本发明属于耐高温涂料技术领域,具体涉及一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法及使用方法。
背景技术
耐高温涂料是一种特种功能性涂料,其可以长期在200摄氏度以上的温度中使用,并保持一定的物理化学性质,使被保护对象在一定的高温环境下发挥正常的作用,广泛应用于机动车发动机喷管、钢铁烟囱、高温管道、高温炉外壳、石油裂解装置及坦克、火炮等高温场所,延缓钢铁等金属设备在高温下的热氢化腐蚀,确保设备能长期使用,随着现代工业的快速发展,对设备耐高温涂层的要求也越来越高,要求在高温下漆膜不变色、不脱落,仍能保持良好的物理机械性能和防腐性能。但是,目前现有的耐高温涂料多数采用自交联的交联方式,仅靠树脂性能达到耐高温目标,其可耐受温度较高温度时对有机硅树脂性能的要求较高,且比重大,而有机硅树脂价格昂贵,耐500度以上的耐高温油漆一般成本相对较高。因此,寻找一种耐高温性好,并能有效提升涂层物理机械性能且成本低廉的涂料是十分重要的。
发明内容
本发明为了解决现有涂料耐高温性能的技术问题,提供一种自交联及烧结交联制备低成本彩色水性超耐高温涂料,采用自交联与烧结交联方式固化成膜,成膜后涂膜陶瓷化,可长效耐高温500℃-850℃甚至到1280℃,产品耐热性能优异,基材附着力好,硬度高,耐磨性能优异,防腐蚀耐候性能好。
本发明的第二个目的是提供一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法。玻璃粉、绢云母、铝矾土粉、高岭土在高温下有相互反应陶瓷化的条件,具备超耐高温的性能。通过自交联水性乳液在低温条件下与氨基树脂加温反应首先形成平整光滑的漆膜,再在逐渐加温的条件下让玻璃粉、绢云母及铝矾土粉在降温稳定剂及烧结材料控制下逐渐陶瓷化,形成双交联耐高温涂料。
本发明的第三个目的是提供一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用。由于使用了烧结交联模式,玻璃粉、绢云母、铝矾土粉等成本极低,可以大幅度降低高成本的有机硅树脂用量,大幅度降低油漆成本。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料,由重量份以下组分组成:
该涂料经过500-850℃高温烧结成型于基材表面。
本申请由有机硅耐热树脂、耐高温颜料、自交联丙烯酸溶液、填料、氨基树脂、烧结材料和助剂组成,产品采用自交联与烧结交联方式固化成膜,成膜后涂膜陶瓷化,通过烧结使分散的单颗粒树脂及粉料熔融、扩散、烧结为密实整体,涂料固化后可长效耐高温500℃-850℃,产品耐热性能优异,基材附着力好,硬度高,耐磨性能优异,防腐蚀耐候性能好,采用烧结交联可以大幅度降低涂料成本,降低对树脂性能的要求,可以制备低成本超耐高温涂料,可广泛应用于汽车、摩托车、拖拉机等车辆排气管、火力发电厂烟囱、加热电器、航天军工等领域。
优选的,所述有机硅耐热树脂包括苯甲基有机硅树脂和甲基有机硅树脂。优选苯甲基有机硅树脂是罗地亚公司型号为Resin 10312产品,具有突出的高热稳定性。甲基有机硅树脂为信越公司型号为KR-220L或KR-220LP,是有机取代基完全有甲基构成的固体型有机硅树脂,具有非常优异的热稳定性。优选苯甲基有机硅树脂和甲基有机硅树脂的比例为1:1-2,通过加热可迅速交联,可形成硬度非常高的,具有耐湿性、绝缘性、防水性、脱模性的涂层。
优选的,所述耐高温颜料包括铝银浆、钴蓝粉和氧化铁红。铝银浆具有耐高温、热稳定性的特点,钴蓝粉耐热绝缘、抗磨性和化学性质稳定好,氧化铁红为物理防锈颜料,可以提高涂膜的致密度,降低可渗性,通过各种耐热颜料复配使得涂料烧结成膜后,平铺于基材表面,多层排列、相互搭接、相互遮掩,产生迷宫效应,增加了外界液体和气体进入涂膜的路径,提高了涂膜的耐高温效果和防腐蚀性能。颜料还应有合理的粒度分布,粒度过粗涂料层粗糙,而且悬浮性和渗透性不好,过细则涂层抗裂性差。其粒度分布应在合适的粒径范围内呈较大的分散度,以充分利用粗细粒子的相互镶嵌作用,得到致密的涂层,提高其抗金属液渗透能力,以300-350目左右为宜。
优选的,所述自交联丙烯酸乳液型号为TAR-3350-50或YB-39F-50,固含量为50±2%,粘度为Y-Z2,其为速干性烤漆用丙烯酸聚氨酯树脂,低温架桥性佳(80℃以上即可架桥)、对金属及无机材质密着性佳、层间密着性佳、烘烤后漆膜与油墨转印密着性能优异、颜料润湿分散性佳、光泽及耐药品性亦佳,与有机硅树脂相容性极佳,颜料润湿分散性佳。
优选的,所述填料包括铝矾土粉、长石粉、金红石型钛白粉和二氧化锆粉。铝矾土粉中Al2O3含量≥85%,铝矾土粉作为涂料的耐火骨料,具有膨胀系数小、耐火度高、化学稳定性好的特点,金红石型钛白粉耐候性好,加入少量金红石型钛白粉和Cr2O3可促进烧结,且均为超细体质填料,可减少颜料的用量。
优选的,所述氨基树脂为六甲氧基甲基三聚氰胺树脂(HMMM)。六甲氧基甲基三聚氰胺树脂可与自交联丙烯酸乳液进行交联反应,通过自交联水性乳液在低温条件下与氨基树脂加温反应首先形成平整光滑的漆膜,再在逐渐加温的条件下让玻璃粉、绢云母及铝矾土粉在降温稳定剂及烧结材料控制下逐渐陶瓷化,形成双交联耐高温涂料。优选型号为CYMEL303,粘度为cps2600-5000,是一种非常有效的交联剂。尤其是与有机硅树脂交联时,能够为漆膜提供良好的柔韧性和成型性,可快速催化固化,并提高硬度的同时也能获得好的柔韧性
优选的,所述降温稳定剂为烤漆安定剂AD-2K、烤漆降温剂LE-6080和/或粘度稳定剂K-38。加入降温稳定剂可以十分有效地解决烤漆的贮存安定性问题,避免涂料自身缩聚交联,影响烤漆安定性。
优选的,所述烧结材料为玻璃粉、绢云母、高岭土;烧结剂促使耐火填料颗粒部分烧结而结壳。
优选的,所述润湿分散剂为BYK190和/或BYK192。
附着力促进剂型号为PN-701,是一种高性能附着力促进剂,该产品分子的活性基团部分对底材具有强烈的粘接性,烧结时可提高分散性并形成无机基材和有机高分子之间的强力键接,增强基材的化学紧密粘接、增加防水性、耐磨性、耐擦洗、耐划伤性。
在水性涂料中使用有机硅助剂,可以显著的提高涂膜的流平性、爽滑性、光泽、防粘性、耐水性、耐化学品性、耐高温性和耐印刷性。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,包括以下步骤:
(1)将有机硅耐热树脂、耐高温颜料、自交联丙烯酸乳液、填料、烧结材料加入球磨罐中,球磨1-2小时,控制转速为200-220r/min;
(2)加入氨基树脂,以800-1000转/分搅拌1-1.5小时混合均匀;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以400-600转/分的转速下搅拌40-60分钟均匀混合,最后过滤,即得。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将涂料涂覆在基材表面,将基材置于80-150℃温度下预烘8-15min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在1.0-3.0g/m2范围内;
S3、烧结:预烘过后的基材在500-850℃的高温下进行烧结20-30min。
本发明相对于现有技术,有以下优点:
本申请提供一种自交联及烧结交联制备低成本彩色水性超耐高温涂料,产品采用自交联与烧结交联方式固化成膜,成膜后涂膜陶瓷化,通过烧结使分散的单颗粒树脂熔融、扩散、烧结为密实整体,涂料固化后可长效耐高温500℃-850℃,产品耐热性能优异,基材附着力好,硬度高,耐磨性能优异,防腐蚀耐候性能好,采用烧结交联可以大幅度降低涂料成本,降低对树脂性能的要求,可以制备低成本超耐高温涂料,可广泛应用于汽车、摩托车、拖拉机等车辆排气管、火力发电厂烟囱、加热电器、航天军工等领域。
本申请的一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,加工简单,成本非常低,产品采用自交联与烧结交联方式固化成膜,成膜后涂膜陶瓷化,通过烧结交联可以大幅度降低油漆成本,降低对树脂性能的要求,可以制备低成本超耐高温涂料。
本申请的一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,采用自交联和烧结交联,成膜后涂膜陶瓷化,先预加热至80-150℃,并在该温度下保持一段时间,再升温至500-850℃进行烧结,使分散的单颗粒树脂熔融、扩散、烧结为密实整体。
具体实施方式
下面结合具体实施例1-4和对比例说明本发明的具体技术方案:
实施例1:
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,包括以下步骤:
(1)按表1重量份称取各组分,将有机硅耐热树脂、耐高温颜料、自交联丙烯酸乳液、填料、烧结材料加入球磨罐中,球磨1.5小时,控制转速为210r/min;
(2)加入氨基树脂,以800转/分搅拌混合1.5小时;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以600转/分的转速下搅拌40分钟均匀混合,最后过滤,即得。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将涂料涂覆在基材表面,将基材置于100℃温度下预烘10min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在1.5g/m2范围内;
S3、烧结:预烘过后的基材在500℃以上的高温下进行烧结20min。
实施例2:
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,包括以下步骤:
(1)按表1重量份称取各组分,将有机硅耐热树脂、耐高温颜料、自交联丙烯酸乳液、填料、烧结材料加入球磨罐中,球磨2小时,控制转速为210r/min;
(2)加入氨基树脂,以900转/分搅拌混合1.5小时;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以400转/分的转速下搅拌60分钟均匀混合,最后过滤,即得。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将涂料涂覆在基材表面,将基材置于130℃温度下预烘12min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在1.0g/m2范围内;
S3、烧结:预烘过后的基材在700℃的高温下进行烧结30min。
实施例3:
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,包括以下步骤:
(1)按表1重量份称取各组分,将有机硅耐热树脂、耐高温颜料、自交联丙烯酸乳液、填料、烧结材料加入球磨罐中,球磨1小时,控制转速为200r/min;
(2)加入氨基树脂,以1000转/分搅拌混合1小时;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以500转/分的转速下搅拌50分钟均匀混合,最后过滤,即得。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将涂料涂覆在基材表面,将基材置于80℃温度下预烘15min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在2.0g/m2范围内;
S3、烧结:预烘过后的基材在850℃的高温下进行烧结25min。
实施例4:
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的制备方法,包括以下步骤:
(1)按表1重量份称取各组分,将有机硅耐热树脂、耐高温颜料、自交联丙烯酸乳液、填料、烧结材料加入球磨罐中,球磨2小时,控制转速为220r/min;
(2)加入氨基树脂,以900转/分搅拌混合1小时;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以500转/分的转速下搅拌45分钟均匀混合,最后过滤,即得。
一种自交联及烧结交联制备低成本彩色水性超耐高温涂料的使用方法,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将涂料涂覆在基材表面,将基材置于150℃温度下预烘8min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在3.0g/m2范围内;
S3、烧结:预烘过后的基材在650℃的高温下进行烧结30min。
表1:实施例1-4中各组分配比,按重量百分比计:
将实施例1-4涂覆有自交联及烧结交联制备低成本彩色水性超耐高温涂料和对比例(市售自交联非烧结耐高温涂料)进行性能对比测试,测试项目和测试结果如表2所示:
表2:性能测试结果:
从实验表2测试结果可知,本申请相较市售的采用自交联耐高温涂料,本申请耐高温可达850℃,本申请所制得的产品耐热性能优异,基材附着力好,硬度高,耐磨性能优异,防腐蚀耐候性能好,可以制备低成本超耐高温涂料,可广泛应用于汽车、摩托车、拖拉机等车辆排气管、火力发电厂烟囱、加热电器、航天军工等领域。
以上所述仅为本申请的较佳实施例而已,并不用以限制本申请,凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本申请的保护范围之内。
Claims (10)
1.一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于,包括以下步骤:
(1)将有机硅耐热树脂、耐高温颜料、自交联丙烯酸溶液、填料、烧结材料加入球磨罐中,球磨1-2小时,控制转速为200-220r/min;
(2)加入氨基树脂,以800-1000转/分搅拌1-1.5小时混合均匀;
(3)加入附着力促进剂、润湿分散剂、降温稳定剂,以400-600转/分的转速下搅拌40-60分钟均匀混合,最后过滤,即得;
该涂料于80-150℃温度下预烘8-15min后经过500-850℃高温烧结成型于基材表面。
3.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述有机硅耐热树脂包括苯甲基有机硅树脂和甲基有机硅树脂。
4.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述耐高温颜料包括铝银浆、钴蓝粉、和氧化铁红。
5.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述自交联丙烯酸溶液固含量为50±2%、粘度为Y-Z2。
6.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述填料包括铝矾土粉、金红石型钛白粉、二氧化锆粉和长石粉。
7.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述氨基树脂为六甲氧基甲基三聚氰胺树脂。
8.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述降温稳定剂为烤漆安定剂AD-2K、LE-6080和/或粘度稳定剂K-38。
9.根据权利要求1所述的一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的制备方法,其特征在于:所述烧结助剂为玻璃粉、绢云母和/或高岭土;
所述润湿分散剂为BYK190和/或BYK192。
10.一种采用自交联及烧结交联方式固化成膜的低成本水性超耐高温涂料的使用方法,其特征在于,包括以下步骤:
S1、基材前处理:对基材进行除油脱酯和除锈除毛刺的前处理;
S2、涂覆及预烘:将权利要求1-9任一项所述的涂料涂覆在基材表面,将基材置于80-150℃温度下预烘8-15min,使涂液水分蒸发,流平均匀,控制涂膜涂覆量在1.0-3.0g/m2范围内;
S3、烧结:预烘过后的基材在500-850℃的高温下进行烧结20-30min。
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