CN106243817A - 一种防火剂的包膜工艺 - Google Patents
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Abstract
本发明涉及防火剂前处理技术领域,特别是一种防火剂的包膜工艺,该工艺包括:物料准备、包膜蜡制备、防火剂包膜和后处理。本发明的技术方案的工艺较为简单,成本较低,适用于对一般的粉末态或颗粒态的防火剂的包覆,采用本发明的技术方案所得的包膜防火剂的耐水性较好,在水性防火涂料体系中无溶解现象,含有该包膜防火剂的超薄水性防火涂料的发泡倍率可达30倍,同时可有效提高涂料耐火时间和涂层耐水性能,适宜进一步推广应用。
Description
技术领域
本发明涉及防火剂前处理技术领域,特别是一种防火剂的包膜工艺。
背景技术
目前市场上防火涂料普遍采用的防火材料主要有聚磷酸铵(APP)、三聚氰胺(MEL)、季戊四醇等,这些防火材料中的很多都具有一定的水溶性,如果将其直接应用在水性防火涂料体系中,会导致部分溶解,严重影响防火涂料的涂层体系的耐水性和防火隔热持续时间,使防火涂料防火性能降低,针对上述问题,开发一种工艺简单、可提高防火剂耐水性能的防火剂包膜工艺是本领域技术人员要解决的技术问题。
发明内容
本发明要解决的技术问题是:针对背景技术中提到的技术问题提供一种使用较为方便、工艺简单、可提高防火剂耐水性能的防火剂包膜工艺。
本发明解决其技术问题所采用的技术方案是:一种防火剂的包膜工艺,该工艺包括如下步骤:
(1)物料准备
按质量份数计,准备如下组分:58#微晶石蜡8-12份,80#以上虫蜡10-14份,热塑性丙烯酸树脂30-35份,凡士林3-6份,乙酸乙烯酯15-19份;醋酸乙酯13-16份;
(2)包膜蜡制备
将上述组分加入反应器内混匀,反应器置于油浴中,将物料逐渐升温至130-150℃,开启冷凝回流并磁力搅拌2h,然后将冷凝管向下倾斜蒸发回收全部溶剂,得瓶中包膜蜡产物,将上述包膜蜡在液态时进行喷雾干燥,得包膜蜡粉产物;
(3)防火剂包膜
将防火剂和上述包膜蜡粉按质量份数比100:(0.1-0.3)投入反应器中,转动反应器20-40min将物料混匀,继续转动反应器同时将60-70℃氮气通入反应器中,1.5-2h后氮气温度升至80-90℃,运行1.5-2h后得防火剂包膜物,取样检测;
(4)后处理
包膜完成后,将5℃的氮气通入转动的反应器中,待反应器腔内温度在7℃以下时,停机出料。
进一步,上述技术方案中所述步骤(1)中物料包括如下组分:58#微晶石蜡10份,80#以上虫蜡12份,热塑性丙烯酸树脂33份,凡士林4.5份,乙酸乙烯酯17份;醋酸乙酯14.5份;步骤(1)中所述热塑性丙烯酸树脂的玻璃化温度为35℃,固体含量为50%;凡士林为无色医用级;所述步骤(3)中的检测方法为:将包膜物样品置于冷却器中冷却至30℃以下,再将包膜物置于室温蒸馏水中,观察包膜物表面与水的浸润情况,若包膜物在水中不出现溶解折光或者80%的体积的包膜物因表面张力浮于水面不沉没,则认为合格;否则继续转动反应器,直到符合上述条件。
有益效果:与现有技术相比,本发明的技术方案的工艺较为简单,成本较低,适用于对一般的粉末态或颗粒态的防火剂的包覆,采用本发明的技术方案所得的包膜防火剂的耐水性较好,在水性防火涂料体系中无溶解现象,含有该包膜防火剂的超薄水性防火涂料的发泡倍率可达30倍,同时可有效提高涂料耐火时间和涂层耐水性能,适宜进一步推广应用。
附图说明
下面将对实施例描述中所需要使用的附图做简单地介绍。
图1是采用实施例五的技术方案所得防火涂料遇火发泡后膨胀倍率图;
图2是采用实施例四的技术方案所得防火涂料遇火发泡后膨胀倍率图。
具体实施方式
下面结合具体实施例对本发明做进一步说明,但本发明不局限于下述实施例。
实施例一
一种防火剂的包膜工艺,该工艺包括如下步骤:
(1)物料准备
按质量份数计,准备如下组分:58#微晶石蜡10份,80#以上虫蜡12份,热塑性丙烯酸树脂33份,凡士林4.5份,乙酸乙烯酯17份;醋酸乙酯14.5份;
(2)包膜蜡制备
将上述组分加入反应器内混匀,反应器置于油浴中,将物料逐渐升温至140℃,开启冷凝回流并磁力搅拌2h,然后将冷凝管向下倾斜蒸发回收全部溶剂,得瓶中包膜蜡产物,将上述包膜蜡在液态时进行喷雾干燥,得包膜蜡粉产物;
(3)防火剂包膜
将防火剂和上述包膜蜡粉按质量份数比100:0.2投入反应器中,转动反应器30min将物料混匀,继续转动反应器同时将65℃氮气通入反应器中,2h后氮气温度升至85℃,运行2h后得防火剂包膜物,取样检测;
(4)后处理
包膜完成后,将5℃的氮气通入转动的反应器中,待反应器腔内温度在7℃以下时,停机出料。
其中,步骤(1)中所述热塑性丙烯酸树脂的玻璃化温度为35℃,固体含量为50%;凡士林为无色医用级,步骤(3)中的检测方法为:将包膜物样品置于冷却器中冷却至30℃以下,再将包膜物置于室温蒸馏水中,观察包膜物表面与水的浸润情况,包膜物在水中不出现溶解折光且80%的体积的包膜物因表面张力浮于水面不沉没,合格。
实施例二
一种防火剂的包膜工艺,该工艺步骤同实施例一,其中,步骤(1)中,按质量份数计,准备如下组分:58#微晶石蜡8份,80#以上虫蜡10份,热塑性丙烯酸树脂30份,凡士林3份,乙酸乙烯酯15份;醋酸乙酯13份;步骤(3)中,防火剂和包膜蜡粉按质量份数比100:0.3投入反应器中;步骤(3)中的检测方法为:将包膜物样品置于冷却器中冷却至30℃以下,再将包膜物置于室温蒸馏水中,观察包膜物表面与水的浸润情况,包膜物在水中不出现溶解折光且80%的体积的包膜物因表面张力浮于水面不沉没,合格。
实施例三
一种防火剂的包膜工艺,该工艺步骤同实施例一,其中,步骤(1)中,按质量份数计,准备如下组分:58#微晶石蜡12份,80#以上虫蜡14份,热塑性丙烯酸树脂35份,凡士林6份,乙酸乙烯酯19份;醋酸乙酯16份;步骤(3)中,防火剂和包膜蜡粉按质量份数比100:0.1投入反应器中。步骤(3)中的检测方法为:将包膜物样品置于冷却器中冷却至30℃以下,再将包膜物置于室温蒸馏水中,观察包膜物表面与水的浸润情况,包膜物在水中不出现溶解折光且80%的体积的包膜物因表面张力浮于水面不沉没,合格。
实施例四
将防火剂聚磷酸铵、三聚氰胺、季戊四醇分别采用上述实施例一的工艺方案所得的防火剂包膜物应用于制备超薄型水性醋丙乳液防火涂料,该防火涂料的制备具有如下步骤:
(1)按质量份数计,准备配方组成为:醋丙乳液24,水16,聚磷酸铵35,三聚氰胺18,季戊四醇18,钛白粉4.5,分散剂六偏磷酸钠0.5,成膜助剂十二酯醇0.6,增稠剂羟乙基纤维素0.4;
(2)将采用实施例一的工艺方案所得聚磷酸铵包膜物、三聚氰胺包膜物、季戊四醇包膜物、钛白粉、投入配方量的水中,高速分散30min,徐徐加入分散剂、成膜助剂,降低转速至500r/min,分散10min,倒入配方量的醋丙乳液,分散均匀,约10min,均匀后徐徐倒入增稠剂,分散5min,即得超薄型水性醋丙乳液防火涂料。
实施例五
一种超薄型水性醋丙乳液防火涂料,其制备方法同实施例四,其中,防火剂聚磷酸铵、三聚氰胺和季戊四醇三者不采用实施例一所述的包膜工艺处理直接加入混合体系中。
将上述实施例四和实施例五所得超薄型水性醋丙乳液防火涂料经无气喷涂法喷涂在3mm厚带防锈底漆的钢板上,分别标记为1号板和2号板,每道湿膜1mm,待前道涂层干燥后喷涂后道,总计三道,室温条件下固化,干膜厚度2-3mm。
参照GB14907中耐水和耐盐雾检测方法,将1号板和2号板分别浸泡在水中48h后测试,1号板表面涂膜无异常,2号板表面涂膜出现微量溶解,1号板耐盐雾可达168h,2号板在31h开始出现锈蚀;如附图1和2所示,将1号板表面涂膜燃烧15min,发泡倍率为30倍(图1),2号板表面涂膜燃烧15min,发泡倍率为20倍(图2)。
由此可见,采用本发明的技术方案所得的包膜防火剂的耐水性较好,含有该包膜防火剂的超薄水性防火涂料耐水性和耐盐雾性能均良好,防火涂料的发泡倍率可达30倍,本发明的技术方案可有效提高防火涂料耐火时间和涂层耐水性能,方便实用,适宜进一步推广应用。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并加以实施,并不能以此限制本发明的保护范围,凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围内。
Claims (4)
1.一种防火剂的包膜工艺,其特征是:该工艺包括如下步骤:
(1)物料准备
按质量份数计,准备如下组分:58#微晶石蜡8-12份,80#以上虫蜡10-14份,热塑性丙烯酸树脂30-35份,凡士林3-6份,乙酸乙烯酯15-19份;醋酸乙酯13-16份;
(2)包膜蜡制备
将上述组分加入反应器内混匀,反应器置于油浴中,将物料逐渐升温至130-150℃,开启冷凝回流并磁力搅拌2h,然后将冷凝管向下倾斜蒸发回收全部溶剂,得瓶中包膜蜡产物,将上述包膜蜡在液态时进行喷雾干燥,得包膜蜡粉产物;
(3)防火剂包膜
将防火剂和上述包膜蜡粉按质量份数比100:(0.1-0.3)投入反应器中,转动反应器20-40min将物料混匀,继续转动反应器同时将60-70℃氮气通入反应器中,1.5-2h后氮气温度升至80-90℃,运行1.5-2h后得防火剂包膜物,取样检测;
(4)后处理
包膜完成后,将5℃的氮气通入转动的反应器中,待反应器腔内温度在7℃以下时,停机出料。
2.根据权利要求1所述的一种防火剂的包膜工艺,其特征是:所述步骤(1)中物料包括如下组分:58#微晶石蜡10份,80#以上虫蜡12份,热塑性丙烯酸树脂33份,凡士林4.5份,乙酸乙烯酯17份;醋酸乙酯14.5份。
3.根据权利要求1所述的一种防火剂的包膜工艺,其特征是:所述热塑性丙烯酸树脂的玻璃化温度为35℃,固体含量为50%;凡士林为无色医用级。
4.根据权利要求1所述的一种防火剂的包膜工艺,其特征是:所述步骤(3)中的检测方法为:将包膜物样品置于冷却器中冷却至30℃以下,再将包膜物置于室温蒸馏水中,观察包膜物表面与水的浸润情况,若包膜物在水中不出现溶解折光或者80%的体积的包膜物因表面张力浮于水面不沉没,则认为合格;否则继续转动反应器,直到符合上述条件。
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