CN110628132A - 一种聚丙烯用阻燃母粒、其制备方法及应用 - Google Patents
一种聚丙烯用阻燃母粒、其制备方法及应用 Download PDFInfo
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Abstract
本发明公开了一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:载体10‑30份、阻燃剂60‑80份、阻燃协效剂10‑20份、硅烷偶联剂0.5‑2份、抗氧剂0.1‑0.2份和增韧剂1‑2份,该聚丙烯用阻燃母粒可应用于制备阻燃型聚丙烯。本发明的有益效果是:本发明阻燃母粒成炭性好、阻燃效率高且能遏制玻纤增强聚丙烯材料燃烧时的“烛芯效应”,当材料燃烧时,可形成致密的壳核结构的炭层,避免了熔滴现象,可有效降低材料燃烧时的热释放速率,从而提高材料的阻燃效率。
Description
技术领域
本发明涉及阻燃剂应用领域,尤其涉及一种聚丙烯用阻燃母粒、其制备方法及应用。
背景技术
随着科技进步,诸多方面都开始要求轻质材料,金属材料由于不适合成型复杂的形状,且重量较重、价格昂贵,限制了它在很多零件中的应用。而聚丙烯材料由于重量轻、价格便宜、可任意注塑成型,经玻纤增强改性后,逐步取代金属材料、ABS树脂等,多用于产品的结构零件上。
聚丙烯材料属易燃材料,氧指数为17%左右。玻纤的加入可以提高聚丙烯的热稳定性,使增强后的材料氧指数可达21.0%,但玻纤增强材料一旦燃烧,由于玻纤的“烛芯效应”,传热快、燃烧速度快、火苗大,较非玻纤增强聚丙烯更难于阻燃。
卤系阻燃剂由于燃烧时易产生有毒、腐蚀性气体,且生烟量大,目前,用于玻纤增强聚丙烯材料的阻燃剂多为无机金属氢氧化物和膨胀体系阻燃剂。金属氢氧化物的添加量多、阻燃效率低,所以单独应用较少;膨胀体系阻燃剂添加量相对较少,应用越来越多,但大多膨胀阻燃剂用于玻纤增强聚丙烯中成炭性仍不够,易产生滴落现象。
发明内容
本发明针对现有玻纤增强聚丙烯材料用阻燃剂的阻燃效果差的问题,提供一种聚丙烯用阻燃母粒、其制备方法及应用。
本发明解决上述技术问题的技术方案如下:一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:载体10-30份、阻燃剂60-80份、阻燃协效剂10-20份、硅烷偶联剂0.5-2份、抗氧剂0.1-0.2份和增韧剂1-2份。
所述载体为共聚聚丙烯、均聚聚丙烯、低密度聚乙烯或超低密度聚乙烯中的一种或多种。
所述阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵30-50%、三聚氰胺氰尿酸盐10-30%、双季戊四醇10-20%、氢氧化镁5-15%和二氧化硅8-10%。
所述阻燃协效剂为蒙脱土、有机蒙脱土、滑石粉、水滑石、针状硅灰石中的一种或多种。上述聚丙烯用阻燃母粒的制备方法为:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
本发明聚丙烯用阻燃母粒可用于制备纤维增强型阻燃聚丙烯,其中各组分所占重量份数如下:聚丙烯用阻燃母粒份10-30份、聚丙烯基材40-70份、长玻璃纤维20-40份。
所述长玻璃纤维长度为10-15mm。
本发明的有益效果是:本发明阻燃母粒成炭性好、阻燃效率高且能遏制玻纤增强聚丙烯材料燃烧时的“烛芯效应”,当材料燃烧时,可形成致密的壳核结构的炭层,避免了熔滴现象,可有效降低材料燃烧时的热释放速率,从而提高材料的阻燃效率。
具体实施方式
以下结合实例对本发明进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
实施例1
一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:共聚聚丙烯10份、阻燃剂80份、蒙脱土20份、硅烷偶联剂KH550 2份、抗氧剂168 0.1份和增韧剂乙烯-丙烯共聚物2份。
阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵30%、三聚氰胺氰尿酸盐30%、双季戊四醇20%、氢氧化镁12%和二氧化硅8%。
本实施例聚丙烯用阻燃母粒的制备方法的步骤为:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
采用本实施例制备的纤维增强型阻燃聚丙烯,包括以下组分:聚丙烯用阻燃母粒份10份、聚丙烯基材40份、长度为10mm的长玻璃纤维40份;其制备方法为:将各组分混合均匀后采用双螺杆挤出机挤出,冷却成型。
实施例2
一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:均聚聚丙烯20份、阻燃剂70份、滑石粉15份、硅烷偶联剂KH560 1.2份、抗氧剂1010 0.15份和增韧剂乙烯-辛烯共聚物1.5份。
阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵50%、三聚氰胺氰尿酸盐10%、双季戊四醇20%、氢氧化镁10%和二氧化硅10%。
本实施例聚丙烯用阻燃母粒的制备方法的步骤为:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
采用本实施例制备的纤维增强型阻燃聚丙烯,包括以下组分:聚丙烯用阻燃母粒份20份、聚丙烯基材55份、长度为11mm的长玻璃纤维30份;其制备方法为:将各组分混合均匀后采用双螺杆挤出机挤出,冷却成型。
实施例3
一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:低密度聚乙烯30份、阻燃剂60份、水滑石10份、硅烷偶联剂KH550 0.5份、抗氧剂168 0.2份和增韧剂乙烯-丁烯共聚物1份。
阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵40%、三聚氰胺氰尿酸盐20%、双季戊四醇15%、氢氧化镁15%和二氧化硅10%。
本实施例聚丙烯用阻燃母粒的制备方法的步骤为:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
采用本实施例制备的纤维增强型阻燃聚丙烯,包括以下组分:聚丙烯用阻燃母粒份30份、聚丙烯基材70份、长度为13mm的长玻璃纤维20份;其制备方法为:将各组分混合均匀后采用双螺杆挤出机挤出,冷却成型。
实施例4
一种聚丙烯用阻燃母粒,按重量份数计,包括如下组分:共聚聚丙烯5份、均聚聚丙烯10份、阻燃剂80份、针状硅灰石17份、硅烷偶联剂KH560 1份、抗氧剂1010 0.1份和增韧剂乙烯-辛烯共聚物1.5份。
阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵47%、三聚氰胺氰尿酸盐30%、双季戊四醇10%、氢氧化镁5%和二氧化硅8%。
本实施例聚丙烯用阻燃母粒的制备方法的步骤为:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
采用本实施例制备的纤维增强型阻燃聚丙烯,包括以下组分:聚丙烯用阻燃母粒份20份、聚丙烯基材60份、长度为15mm的长玻璃纤维25份;其制备方法为:将各组分混合均匀后采用双螺杆挤出机挤出,冷却成型。
对比例
一种纤维增强型聚丙烯,包括70重量份的聚丙烯基材和30重量份长度为11mm的长玻璃纤维,采用双螺杆挤出机挤出、冷却成型制得。
将实施例1-4玻纤增强型阻燃聚丙烯和对比例玻纤增强型聚丙烯进行相关测试,结果如表1所示。
表1.实施例1-4和对比例聚丙烯材料检测结果
备注:
1、“√”表示通过测试;“×”表示未通过测试。
2、测试方法
材料的成炭情况及热分析:锥形量热仪;
垂直燃烧测试:ANSI/UL-94-1985;
材料的灼热丝可燃性试验:GB/T 5169.12-2013;
材料的灼热丝起燃性试验:GB/T 5169.13-2013。
由表1测试数据对比分析可以看出,本发明的阻燃母粒用于玻纤增强聚丙烯材料中后可使材料达到UL94 V-0(1.0mm),同时可通过GWIT 750℃(1.5mm)、GWFI 850℃(1.5mm)灼热丝测试。材料燃烧后的炭层致密,具有壳核结构,且明显降低了热释放速率。
以上所述仅为本发明的较佳实施例,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、改进等,均应包含在本发明的保护范围之内。
Claims (7)
1.一种聚丙烯用阻燃母粒,其特征在于,按重量份数计,包括如下组分:载体10-30份、阻燃剂60-80份、阻燃协效剂10-20份、硅烷偶联剂0.5-2份、抗氧剂0.1-0.2份和增韧剂1-2份。
2.根据权利要求1所述的聚丙烯用阻燃母粒,其特征在于,所述载体为共聚聚丙烯、均聚聚丙烯、低密度聚乙烯或超低密度聚乙烯中的一种或多种。
3.根据权利要求1所述的聚丙烯用阻燃母粒,,其特征在于,所述阻燃剂由以下重量分数的物质组成:密胺包覆聚磷酸铵30-50%、三聚氰胺氰尿酸盐10-30%、双季戊四醇10-20%、氢氧化镁5-15%和二氧化硅8-10%。
4.根据权利要求1所述的聚丙烯用阻燃母粒,其特征在于,所述阻燃协效剂为蒙脱土、有机蒙脱土、滑石粉、水滑石、针状硅灰石中的一种或多种。
5.一种如权利要求1-4任一项所述的聚丙烯用阻燃母粒的制备方法,其特征在于,包括以下步骤:按重量份依次称取各组分,将载体加入到高速搅拌机中,开动高搅机,转速为200r/min,温度为180℃,加入硅烷偶联剂、抗氧剂和增韧剂,继续搅拌3-8min;再加入剩余组分,保持温度继续搅拌10min,转移至双螺杆挤出机料斗中,挤出后造粒即得。
6.一种纤维增强型阻燃聚丙烯,其特征在于,由权利要求1-4任一项所述的聚丙烯用阻燃母粒、聚丙烯基材和长玻璃纤维组成,各组分所占重量份数如下:聚丙烯用阻燃母粒10-30份、聚丙烯基材40-70份、长玻璃纤维20-40份。
7.根据权利要求1所述的纤维增强型阻燃聚丙烯,其特征在于,所述长玻璃纤维长度为10-15mm。
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