CN109177377A - 一种耐高温抗氧化聚合物改性沥青防水卷材 - Google Patents
一种耐高温抗氧化聚合物改性沥青防水卷材 Download PDFInfo
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Abstract
本发明公开了一种耐高温抗氧化聚合物改性沥青防水卷材,包括胎基和粘结在胎基上下表层的隔离膜,所述胎基和隔离膜之间采用高聚物改性沥青相互粘结,所述高聚物改性沥青中加入了抗氧剂。本发明的聚合物改性沥青防水卷材耐高温性能非常理想,且其它指标也都很理想,解决了现有耐高温防水卷材在其它指标不理想的技术难题。
Description
技术领域
本发明涉及一种防水卷材,特别涉及一种耐高温抗氧化聚合物改性沥青防水卷材。
背景技术
改性沥青防水卷材现广泛应用于工业和民用建筑的屋面、地下室、卫生间等防水工程以及屋顶花园、道路、桥梁、隧道、停车场、游泳池等工程的防水防潮,作为工程基础与建筑物之间无渗漏连接,是整个工程防水的屏障。现有的改性沥青防水卷材是以改性石油沥青为引滞覆盖层,以聚酯纤维无纺布、黄麻布、玻纤毡等材料为胎基,以塑料薄膜为防粘隔离层,经一定加工工序加工制作而成的,其拥有很好的防水性、较高的弹性和耐疲劳性。
然而,由于现如今气候变化日益严重,地球日益变暖,对于改性沥青防水卷材的耐高温抗氧化方面的要求非常严格,且解决防水卷材本身的耐高温(抗老化)性能是各厂家目前要全力解决的难题,同时,现有的耐高温防水卷材在耐高温性能方面也有所成效,但是其他指标不尽理想。因此,既要解决耐高温问题,又要在性价比方面居于前列也是一大难题。
发明内容
本发明的目的在于:针对上述存在的问题,提供一种耐高温抗氧化聚合物改性沥青防水卷材,其具有显著的耐高温性能,能够满足高温环境下的正常使用。
本发明采用的技术方案如下:
本发明的耐高温抗氧化聚合物改性沥青防水卷材,包括胎基和粘结在胎基上下表层的隔离膜,所述胎基和隔离膜之间采用高聚物改性沥青相互粘结,所述高聚物改性沥青中加入了抗氧剂。抗氧剂可以延缓或抑制聚合物氧化过程的进行,从而阻止聚合物的老化并延长其使用寿命。塑料、合成纤维和橡胶等高分子材料容易发生热氧降解反应,加入抗氧剂可以保持高分子材料的优良性能,延长使用寿命。
进一步地,所述高聚物改性沥青的制备步骤为:
(1)前处理,对胎基进行耐高温性处理;
(2)制作高聚物改性沥青覆盖料:a、将沥青和增塑剂混合后加热搅拌;b、向其中加入改性材料,升温至185℃-195℃搅拌并研磨2h;c、加入抗氧剂后在185℃-195℃搅拌20min;d、加入填充剂后在175℃-195℃搅拌2h;
(3)高聚物改性沥青覆盖料检验,对搅拌完成后的高聚物改性沥青覆盖料进行针入度、软化点检验,待检验合格后,打入涂油槽;
(4)成型,将胎基展卷、烘干后浸渍到涂油槽中,充分浸渍高聚物改性沥青覆盖料后,取出后水冷,将隔离膜覆盖在胎基上下两表面,经挤出器滚压成型;
(5)整理,成型后卷材,码垛,包装。
作为优选,所述步骤(1)中的胎基为改性聚乙烯或长纤聚酯毡。胎基一般用聚酯毡和聚乙烯。改性聚乙烯相对于普通聚乙烯,软化点高,强度高,耐老化性强,不易开裂。采用长纤聚酯毡的胎基相对于其他胎基(玻纤毡、短纤聚酯毡)具有更大的拉伸强度、撕裂强度、顶破强度和更好的延伸率及热稳定性。
作为优选,所述步骤(1)中的耐高温性处理包括在胎基生产过程中添加防腐剂。添加防腐剂能够进一步使防水卷材具备耐老化、抗紫外线的特点,且具有耐酸、碱、盐腐蚀和抗霉菌的作用。
作为优选,所述步骤(2)中的改性材料包括SBS改性剂和SIS改性剂,改性剂的使用可以提高沥青的强度和韧性。
作为优选,所述步骤(2)中抗氧剂为BW5。
作为优选,所述步骤(2)中的填充剂包括滑石粉。
作为优选,所述步骤(2)中的高聚物改性沥青覆盖料的物料配比(配比量100%)为:
沥青 45%-50%
增塑剂 8%-10%
SBS改性剂 5%-8%
SIS改性剂 3%-5%
BW5改性剂 3%-4%
增粘剂 5%-10%
滑石粉 20%-25%;
作为优选,所述步骤(4)中的隔离膜的材质为聚乙烯。
综上所述,由于采用了上述技术方案,本发明的有益效果是:
本发明的耐高温抗氧化聚合物改性防水卷材,在传统的制作高聚物改性沥青覆盖料过程中加入了BW5抗氧剂,BW5抗氧剂不仅能够提升防水卷材的抗氧化、防老化性能,而且对其耐高温性能也有意想不到的优良效果,且其用量控制好后也不会影响防水卷材的其他性能,想较于现有的耐高温防水卷材,本发明的防水卷材各方面指标都很理想,性价比更高。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下实施例对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明的耐高温抗氧化聚合物改性沥青防水卷材,包括胎基和粘结在胎基上下表层的隔离膜,所述胎基和隔离膜之间采用高聚物改性沥青相互粘结,所述高聚物改性沥青中加入了抗氧剂。现有的沥青氧化改性技术均是在高温下(260-280℃)往沥青通入空气进行氧化,使胶质和沥青质发生缩合反应,生成较大的分子,改进沥青的组成,以便得到高软化点、低针入度的氧化沥青。然而,经过氧化处理的沥青并不适用于防水卷材的制作,原因为:氧化沥青原料在260-280℃高温下,与空气接触反应,通过聚合、缩合、脱氢等使原料的化学组分发生变化,原料中的饱和分由14%减少到8%,芳香由原来的32%减少到25.5%,沥青中的胶质部分基本没有改变,饱和分和芳香分减少的量就相当于沥青质增加的量。生产改性沥青时高分子材料就是通过饱和分、芳香分等物质进行溶合形成网络。饱和分、芳香分的减少会影响改性沥青效果。沥青中的饱和分在氧化前后的变化就很大,不管使用什么样的原料都使芳香分减少很多。
因此,为了是氧化处理后的沥青适用于防水卷材的制作,本发明选择在高聚物改性沥青中加入抗氧化剂,沥青在改性之后已经具备了良好的防水性、较高的弹性和耐疲劳性,同时再加入抗氧化剂进行抗氧化处理,不仅能避免沥青氧化,同时对沥青中饱和分和芳香分的量的影响不大,既显著提升了防水卷材的耐高温性能,又保证了防水卷材的其他性能。
进一步,上述高聚物改性沥青的制备步骤为:
(1)前处理,对胎基进行耐高温性处理;
(2)制作高聚物改性沥青覆盖料,a、将沥青和增塑剂混合后加热搅拌;b、向其中加入改性材料,升温至185℃-195℃搅拌并研磨2h;c、加入抗氧剂后在185℃-195℃搅拌20min;d、加入填充剂后在175℃-195℃搅拌2h;
(3)高聚物改性沥青覆盖料检验,对搅拌完成后的高聚物改性沥青覆盖料进行针入度、软化点检验,待检验合格后,打入涂油槽;
(4)成型,将胎基展卷、烘干后浸渍到涂油槽中,充分浸渍高聚物改性沥青覆盖料后,取出后水冷,将隔离膜覆盖在胎基上下两表面,经挤出器滚压成型;
(5)整理,成型后卷材,码垛,包装。
作为优选,上述步骤中,步骤(1)中胎基为改性聚乙烯或长纤聚酯毡,耐高温性处理包括在胎基生产过程中添加防腐剂;步骤(2)中的改性材料包括SBS改性剂和SIS改性剂,抗氧剂为BW5,填充剂包括滑石粉;步骤(4)中的隔离膜的材质为聚乙烯。
上述步骤中,在加入改性材料SBS和SIS对沥青改性后,改性剂已均匀分布于沥青中形成了一定的空间网络结构,沥青的弹性、防水性和抗疲劳等性质均已得到了提升,然后再加入抗氧剂BW5,BW5能够均匀分散于空间网络结构中,在不改变沥青的结构性质前提下形成一个稳定的系统,整体对改性沥青的抗氧化、耐高温性质进行了显著提升,同时经多次实践测定改性沥青的其他性质都没有受到影响。
在一个优选的实施例中,步骤(2)中的高聚物改性沥青覆盖料的物料配比(配比量100%)为:
A:原始比例
沥青 45%-50%
增塑剂 8%-10%
SBS改性剂 5%-8%
SIS改性剂 3%-5%
增粘剂 5%-10%
滑石粉 20%-28%;
B:改善后比例
沥青 45%-50%
增塑剂 8%-10%
SBS改性剂 5%-8%
SIS改性剂 3%-5%
BW5改性剂 3%-4%
增粘剂 5%-10%
滑石粉 20%-25%;
为了保证BW5的最佳效果,且不影响其他性能,加入BW5对改性沥青进行处理的量显得尤为重要。BW5的用量过少会影响其耐高温性提升效果,用量过多又会对其他性能造成影响,因此,本实施例经过多次实践得出,当BW5的用量为3%-4%时,改性沥青防水卷材的耐高温性能就非常理想,而且其它指标也都很理想。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (9)
1.一种耐高温抗氧化聚合物改性沥青防水卷材,包括胎基和粘结在胎基上下表层的隔离膜,其特征在于,所述胎基和隔离膜之间采用高聚物改性沥青相互粘结,所述高聚物改性沥青中加入了抗氧剂。
2.如权利要求1所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述高聚物改性沥青的制备步骤为:
(1)前处理,对胎基进行耐高温性处理;
(2)制作高聚物改性沥青覆盖料,a、将沥青和增塑剂混合后加热搅拌;b、向其中加入改性材料,升温至185℃-195℃搅拌并研磨2h;c、加入抗氧剂后在185℃-195℃搅拌20min;d、加入填充剂后在175℃-195℃搅拌2h;
(3)高聚物改性沥青覆盖料检验,对搅拌完成后的高聚物改性沥青覆盖料进行针入度、软化点检验,待检验合格后,打入涂油槽;
(4)成型,将胎基展卷、烘干后浸渍到涂油槽中,充分浸渍高聚物改性沥青覆盖料后,取出后水冷,将隔离膜覆盖在胎基上下两表面,经挤出器滚压成型;
(5)整理,成型后卷材,码垛,包装。
3.如权利要求2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(1)中的胎基为改性聚乙烯或长纤聚酯毡。
4.如权利要求2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(1)中的耐高温性处理包括在胎基生产过程中添加防腐剂。
5.如权利要求2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(2)中的改性材料包括SBS改性剂和SIS改性剂。
6.如权利要求1或2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述抗氧剂为BW5。
7.如权利要求2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(2)中的填充剂包括滑石粉。
8.如权利要求2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(2)中的高聚物改性沥青覆盖料的物料配比(配比量100%)为:
沥青 45%-50%
增塑剂 8%-10%
SBS改性剂 5%-8%
SIS改性剂 3%-5%
BW5改性剂 3%-4%
增粘剂 5%-10%
滑石粉 20%-25%。
9.如权利要求1或2所述的耐高温抗氧化聚合物改性沥青防水卷材,其特征在于,所述步骤(4)中的隔离膜的材质为聚乙烯。
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