本文目录一览:
- 1、抗碱封闭底漆有什么作用?
- 2、5、在汽车的涂装中,车身涂装用二道底漆和封闭漆是什么意思?
- 3、封闭底漆的作用是什么?
- 4、什么是封闭底漆
抗碱封闭底漆有什么作用?
抗碱封闭底漆的主要作用是用于混凝土基材作防护封闭底漆。
(1)封闭基底,渗透到基材内部结构,堵塞基底中的毛细孔,降低基底中开放孔数量,增多封闭孔数,抑制涂料水分的渗透,使渗透变得均匀,使基底对上层涂料的吸收变得均匀。
(2)封闭底漆能防止水分,抗碱隔离作用,对基层的碱分能有效隔离,防止碱分的渗出破坏涂层。
(3)对疏松薄弱的基底进行补强作用,加固基底。
扩展资料:
抗碱封闭底漆涂层对混凝土附着力超强,突出的耐碱性和封闭性能,与多种地坪涂料及混凝土构筑物防护涂料配套性好;碱封闭底漆由耐碱树脂、耐磨填料、溶剂、助剂等组成;配套涂料有氯磺化聚乙烯,高氯化聚乙烯,氯化橡胶等多种涂料。
封闭底漆有溶剂性和水性两种,溶剂性封闭底渗透强,封闭性强,水性有水乳液与水溶性。水乳液与硅溶胶复合的封闭底漆起到溶剂型与乳液两种结合的封闭性能。
5、在汽车的涂装中,车身涂装用二道底漆和封闭漆是什么意思?
二道底漆和封闭底漆也可称为中间层涂料, 主要用于腻子与面漆之间的涂层, 同时也用于填补腻子上的细小缺陷、 道痕。 封闭漆用于中间涂层的最后一道工序,旨在避免喷涂面漆后发生与中间涂层咬起、渗色等缺陷。 由于我国这种封闭漆品种较少, 故应用并不十分广泛, 通常是使用头道底漆来代替。
封闭底漆的作用是什么?
封闭底漆到底有什么作用?
1.封闭底漆并不一定涂装到金属上,水泥结构上的涂装业不少,而水泥结构很多都会存在小坑,裂缝等,所以封闭底漆应该拥有很好的渗透性,这样就可以把这些小瑕疵进行填充,达到平整的效果。
2.封闭底漆都属于更底层涂装,很多防腐漆在涂装时,就自带一定程度的化学腐蚀,所以涂层必须耐化学溶剂的溶解。
3.封闭底漆因为紧邻基材表面,所以一旦附着力不强,那脱落必不可免,所以封闭底漆应该拥有极强的附着力,和机械性能,不会因为使用或其它原因造成碎裂和剥落。
4.封闭底漆和防腐漆一同撑起整个防腐涂层,所以内部自然不可以有矛盾发生,尽可能呈现惰性,不会和防腐漆发生各种化学反应,保证防腐性能。
5.封闭底漆根据不同的应用范围应该有着明确的特性,比如在食物行业或饮用水中应用,那必须保证无毒害方可。
6.封闭底漆应有一定的耐高温性,总不至于工作温度升高,自身便消融或者发生其它物理变化吧。
什么是封闭底漆
封闭底漆直接附着在基底上,其上附着有中涂、面涂,起承上启下的作用,良好的涂层系统在层与层涂膜之间没有层的界面,涂料施工要求每道工序之间可以进行有效的相互渗透,整个涂层成为一个整体,封闭底漆是附着在基材上的之一道膜,因而封闭底漆的质量要求很高,有良好的耐水、耐碱性、防水隔离盐碱渗出,有良好的附着力与层间附着力。封闭底漆成分一为由高渗透性环氧树脂液,成份二为专用固化剂,适用于混凝土、木材、水磨石、钢铁等基材表面作封闭底漆。
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