CN106833283A - 基于可膨胀石墨的防火涂料 - Google Patents

基于可膨胀石墨的防火涂料 Download PDF

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CN106833283A
CN106833283A CN201710120821.2A CN201710120821A CN106833283A CN 106833283 A CN106833283 A CN 106833283A CN 201710120821 A CN201710120821 A CN 201710120821A CN 106833283 A CN106833283 A CN 106833283A
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expansible graphite
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倪世宏
王华林
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Hefei Insulate New Material Technology Co Ltd
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Abstract

本发明涉及一种基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨10~20%,碳化硅纤维10~15%,多聚磷酸铵‑三聚氰胺‑季戊四醇5~10%,三聚氰胺5~9%,季戊四醇4~8%,聚丙烯酸酯乳液5~10%,聚醋酸乙烯乳液5~10%,环氧树脂6~12%,高岭土6~12%,纳米TiO26~12%,加工助剂8~12%。干燥涂层薄,遇火时耐火能力优异,满足装饰要求。

Description

基于可膨胀石墨的防火涂料
技术领域
本发明属于化工涂料技术领域,具体涉及一种基于可膨胀石墨的防火涂料。
背景技术
我国是天然石墨资源第一大国(世界上2/3的储量在我国)。石墨是一种无机物质,化学成分为C,属六方晶系,晶体呈六方板状和片状,集合体为鳞片状,铁黑色,密度为2.25g/cm3,有滑感,能导电,化学性质不活泼,具有耐腐蚀性。可膨胀石墨是以天然鳞片石墨为原料,经化学或电化学处理而得到的一种石墨产品。由天然鳞片石墨制得的可膨胀石墨材料既保留了石墨的耐高温,耐腐蚀,能承受中子流、β射线、γ射线的长期辐照,摩擦系数低,自润滑性好,导电导热并呈各向异性等性能,又具备天然石墨所没有的可弯曲、可压缩、有弹性、不渗透等特点,并且疏松多孔。在高温、高压或辐射条件下不发生分解、变形或老化,化学性质稳定。石墨具有层状结构,碱金属、卤素金属卤化物、强氧化性含氧酸等都可嵌入层间,形成层间化合物,在受到200℃以上高温时,由于吸留在层形点阵中的化合物的分解,石墨层间的化合物急剧分解、气化、膨胀(沿层间膨胀150-250倍),使可膨胀石墨开始膨胀,并在1100℃时达到最大体积。最终体积可以达到初始时的280倍,从而制得密度极低(0.003-0.005g/cm3)的蠕虫状石墨。随着装饰要求越来越高,对涂料的薄层防火要求也越来越高。
发明内容
本发明目的是提供一种基于可膨胀石墨的防火涂料,干燥涂层薄,遇火时耐火能力优异,满足装饰要求。
为了实现以上目的,本发明采用的技术方案为:一种基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨10~20%,碳化硅纤维10~15%,多聚磷酸铵-三聚氰胺-季戊四醇5~10%,三聚氰胺5~9%,季戊四醇4~8%,聚丙烯酸酯乳液5~10%,聚醋酸乙烯乳液5~10%,环氧树脂6~12%,高岭土6~12%,纳米TiO26~12%,加工助剂8~12%。
优选的,所述的基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨15%,碳化硅纤维13%,多聚磷酸铵-三聚氰胺-季戊四醇8%,三聚氰胺6%,季戊四醇5%,聚丙烯酸酯乳液7%,聚醋酸乙烯乳液8%,环氧树脂10%,高岭土10%,纳米TiO28%,加工助剂10%。
进一步的,所述的加工助剂包括增塑剂15~25%,分散剂5~15%,消泡剂13~25%,成膜剂18~30%、防霉剂10~20%,颜料5~15%。
本发明的技术效果在于:上述配料的可膨胀石墨的阻燃属于凝固相阻燃机理,其是通过延缓或中断固态物质产生可燃性物质而达到阻燃的,受热到一定程度,可膨胀石墨就会开始膨胀,从而形成一个很厚的多孔碳化层,该碳化层把阻燃主体和热源隔开,从而延缓和终止聚合物的分解,而且本身无毒,受热时不产生有毒和腐蚀性气体,并能大大降低发烟量,有足够的热稳定性。可膨胀石墨防火涂料涂层膨胀后形成的多孔泡沫碳化层的厚度要比膨胀前的厚度大几十倍至两百多倍;碳纤维、碳化硅纤维为含碳本质阻燃纤维,提高涂料的耐火极限;在选择脱水成炭催化剂、成炭剂和发泡剂的品种和用量时应注意,发泡剂的分解点和成炭剂的碳化温度应保持基本相同,故选择多聚磷酸铵-三聚氰胺-季戊四醇为膨胀阻燃剂;聚丙烯酸酯乳液、聚醋酸乙烯乳液、环氧树脂遇火可分解出不燃或难燃的气体,进一步提高涂料的耐火极限;高岭土提高涂料的可塑性;纳米TiO2能够降解空气中的有害有机物,具有光催化性能和超亲水性、超亲油性,不仅能杀死环境中的细菌、能降解由细菌释放出的有毒复合物,而且还具有自清洁效应,提高涂料的防污、防雾性能。按照上述配比的得到的涂料,遇火时,涂料的涂层发生软化熔融,膨胀形成海绵状或蜂窝状碳化层。可膨胀石墨在受高温时体积瞬间膨胀,在火灾发生时将火焰窒息,且膨胀产物有抗氧化性和耐高温性。此外,涂料的涂层在膨胀发泡时,发生吸热反应,消耗大量热量,降低了体系的温度;生成的不燃性气体使可燃性气体的浓度降低,并有效地隔绝氧气,从而最大限度地使被保护基材受到防火隔热阻燃的保护。其干燥涂层厚度2mm,可耐720℃的高温,耐火极限达到100min,耐火能力优异。
具体实施方式
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:一种基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨15%,碳化硅纤维13%,多聚磷酸铵-三聚氰胺-季戊四醇8%,三聚氰胺6%,季戊四醇5%,聚丙烯酸酯乳液7%,聚醋酸乙烯乳液8%,环氧树脂10%,高岭土10%,纳米TiO28%,加工助剂10%。
进一步的,所述的加工助剂包括增塑剂15~25%,分散剂5~15%,消泡剂13~25%,成膜剂18~30%、防霉剂10~20%,颜料5~15%。
按照上述配比得到的涂料,其干燥涂层厚度2mm,可耐720℃的高温,耐火极限达到110min,耐火能力优异。
实施例2:一种基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨16%,碳化硅纤维12%,多聚磷酸铵-三聚氰胺-季戊四醇6%,三聚氰胺6%,季戊四醇5%,聚丙烯酸酯乳液8%,聚醋酸乙烯乳液8%,环氧树脂7%,高岭土12%,纳米TiO210%,加工助剂10%。
进一步的,所述的加工助剂包括增塑剂15~25%,分散剂5~15%,消泡剂13~25%,成膜剂18~30%、防霉剂10~20%,颜料5~15%。
按照上述配比得到的涂料,其干燥涂层厚度2mm,可耐720℃的高温,耐火极限达到100min,耐火能力优异。
实施例3:一种基于可膨胀石墨的防火涂料,按照重量百分比的原料包括:可膨胀石墨18%,碳化硅纤维13%,多聚磷酸铵-三聚氰胺-季戊四醇8%,三聚氰胺6%,季戊四醇6%,聚丙烯酸酯乳液8%,聚醋酸乙烯乳8%,环氧树脂7%,高岭土10%,纳米TiO28%,加工助剂8%。
进一步的,所述的加工助剂包括增塑剂15~25%,分散剂5~15%,消泡剂13~25%,成膜剂18~30%、防霉剂10~20%,颜料5~15%。
按照上述配比得到的涂料,其干燥涂层厚度2mm,可耐720℃的高温,耐火极限达到100min,耐火能力优异。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。

Claims (3)

1.一种基于可膨胀石墨的防火涂料,其特征在于,按照重量百分比的原料包括:可膨胀石墨10~20%,碳化硅纤维10~15%,多聚磷酸铵-三聚氰胺-季戊四醇5~10%,三聚氰胺5~9%,季戊四醇4~8%,聚丙烯酸酯乳液5~10%,聚醋酸乙烯乳液5~10%,环氧树脂6~12%,高岭土6~12%,纳米TiO26~12%,加工助剂8~12%。
2.根据权利要求1所述的基于可膨胀石墨的防火涂料,其特征在于,按照重量百分比的原料包括:可膨胀石墨15%,碳化硅纤维13%,多聚磷酸铵-三聚氰胺-季戊四醇8%,三聚氰胺6%,季戊四醇5%,聚丙烯酸酯乳液7%,聚醋酸乙烯乳液8%,环氧树脂10%,高岭土10%,纳米TiO28%,加工助剂10%。
3.根据权利要求1或2所述的基于可膨胀石墨的防火涂料,所述的加工助剂包括增塑剂15~25%,分散剂5~15%,消泡剂13~25%,成膜剂18~30%、防霉剂10~20%,颜料5~15%。
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CN107722793A (zh) * 2017-11-21 2018-02-23 马鞍山松鹤信息科技有限公司 一种纳米防火涂料及其制备方法
CN110317510A (zh) * 2019-08-06 2019-10-11 纯钧新材料(深圳)有限公司 膨胀型的防火涂料及其制备方法

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Application publication date: 20170613