CN112250944B - 一种pp色母粒及其制备方法 - Google Patents
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Abstract
本发明涉及高分子材料技术领域,特别涉及一种PP色母粒及其制备方法。本发明的一种PP色母粒,由如下原料组成:增韧剂EMA、滑石粉母粒、色粉、抗氧剂、硅酮母粒、PP。本发明的PP色母粒用于增韧改性PP材料,赋予PP材料低温韧性的同时保持PP材料的高刚性。与普通的PP改性增韧剂如POE和EPDM相比,解决了改性PP材料的低温脆性问题,改善了增韧PP的常温模量。
Description
技术领域
本发明涉及高分子材料技术领域,特别涉及一种PP色母粒及其制备方法。
背景技术
聚丙烯(PP)是由丙烯聚合而得到的高分子化合物。由于其原料丰富,合成工艺比较简单,与其他通用热塑性塑料相比,PP具有相对密度小、价格低、加工性好以及综合性能较好等特点。其屈服强度、拉伸强度、表面硬度及弹性模量均较优异,并有突出的耐应力开裂性和耐磨性。因而在汽车工业、家用电器、建筑行业等多方面得到广泛的应用。但PP也存在低温脆性、韧性差以及机械性能较低、成型收缩率大等缺点,因此在应用上作为结构材料使用时受到了很大限制。为了扩大PP的应用范围并降低成本,必须对PP进行一定程度的改性。
现有提高PP低温脆性和低温韧性的技术路线主要有两种,其一:PP+POE+滑石粉物理共混;其二:PP+EPDM+滑石粉物理共混。这两种技术方案中,无论是POE还是EPDM其增韧效果都不是很理想,而且这两类增韧剂与PP基材和滑石粉的相容性不是最好,从而导致两类改性PP材料的低温冲击强度偏低,常温的弯曲模量偏低易变形。
发明内容
本发明的目的在于解决普通增韧剂和滑石粉填充改性PP的低温脆性和常温易变形问题,提供一种PP色母粒及其制备方法。
为了达到上述目的,本发明所设计的一种PP色母粒,以重量份数计,由如下原料组成:
作为优选,所述增韧剂EMA采用美国杜邦公司生产的AC1330、AC1820或AC3427中的一种。作为进一步优选,所述增韧剂EMA采用美国杜邦公司生产的AC1330。
作为优选,所述滑石粉母粒采用硅含量60%-65%的滑石粉,滑石粉的目数在2400-2600目,滑石粉在使用之前用硬脂酸进行表面处理,并制成滑石粉母粒。
作为进一步优选,所述滑石粉母粒采用硅含量62%的滑石粉,滑石粉的目数位2500目。
作为优选,所述硅酮母粒采用极性更好的德国瓦克硅酮母粒。
作为优选,所述PP色母粒使用时与PP基材的重量配比为1:5。
本发明的另一目的是提供一种上述PP色母粒的制备方法,具体包括如下步骤:
1)将粉料在高混机中进行干燥、活化处理;将粒料在烘干机中进行干炒处理;
2)将处理好的基料、辅料、助剂等原料按配方比例计量后投入混料机中进行混合;
3)将混合后的物料投入双螺杆挤出机中混炼挤出拉条造粒,设定挤出机1区温度为160℃、2区温度为180℃、3区温度为180℃、4区温度为200℃、5区温度为200℃、6区温度为200℃、7区温度为200℃、机头温度为190℃、熔体温度为205℃、主机转速为280-300rpm;
4)将挤出物料经冷却、风干、切粒、干燥后装包入库。
本发明通过筛选增韧剂和滑石粉种类,以及调整增韧剂及滑石粉的重量配比,解决了普通滑石粉填充改性PP的低温脆性和常温下易变形的问题。因为本发明的PP母粒中含有大量的增韧剂和滑石粉,母粒的粘度非常大,为使母粒中的各个组分均匀分散开来,故使用极性更好的硅酮母粒。
本发明的PP色母粒用于增韧改性PP材料,赋予PP材料低温韧性的同时保持PP材料的高刚性。与普通的PP改性增韧剂如POE和EPDM相比,解决了改性PP材料的低温脆性问题,改善了增韧PP的常温模量。采用本发明PP色母粒(增韧剂EMA选用美国杜邦公司生产的AC1330)以重量比例1:5添加到PP基材中,改性后PP材料的常温23℃缺口冲击强度≥500J/m,弯曲模量≥1250Mpa;低温-20℃缺口冲击强度≥200J/m,弯曲模量≥1600Mpa。
因本发明PP色母粒与PP基材的重量配比是1:5,经过均混成型加工后,形成了6倍的耐寒高模量PP材料制品,也就是说整个生产制造过程中,节省了5道的改性料挤出造粒的加工费用,所以成倍的降低了高耐寒增刚PP的制造成本。
具体实施方式
PP色母粒按如下配方
通过如下方法制备得到:
1)将粉料在高混机中进行干燥、活化处理;将粒料在烘干机中进行干炒处理;
2)将处理好的基料、辅料、助剂等原料按配方比例计量后投入混料机中进行混合;
3)将混合后的物料投入双螺杆挤出机中混炼挤出拉条造粒,设定挤出机1区温度为160℃、2区温度为180℃、3区温度为180℃、4区温度为200℃、5区温度为200℃、6区温度为200℃、7区温度为200℃、机头温度为190℃、熔体温度为205℃、主机转速为280-300rpm;
4)将挤出物料经冷却、风干、切粒、干燥后装包入库。
将上述各个实施例的PP色母粒以与PP基材1:5的重量比例加入到PP基材中,并添加滑石粉制得改性PP料,其性能测试结果如下:
采用本发明实施例1PP色母粒制得的改性PP料与采用POE、EPDM制得的改性PP料的性能对比测试结果如下:
Claims (2)
1.一种PP色母粒,其特征在于:以重量份数计,由如下原料组成:
增韧剂EMA 10-30份
滑石粉母粒 60-80份
色粉 1-5份
抗氧剂 0.2-0.8份
硅酮母粒 0.5-2份
PP 5-10份
所述增韧剂EMA采用美国杜邦公司生产的AC1330;
所述滑石粉母粒采用硅含量62%的滑石粉,滑石粉的目数为2500目;滑石粉在使用之前用硬脂酸进行表面处理,并制成滑石粉母粒;
所述硅酮母粒采用德国瓦克硅酮母粒;
所述PP色母粒使用时与PP基材的重量配比为1:5。
2.一种如权利要求1所述PP色母粒的制备方法,其特征在于:具体包括如下步骤:
1)将粉料在高混机中进行干燥、活化处理;将粒料在烘干机中进行干燥处理;
2)将处理好的原料按配方比例计量后投入混料机中进行混合;
3)将混合后的物料投入双螺杆挤出机中混炼挤出拉条造粒,设定挤出机1区温度为160℃、2区温度为180℃、3区温度为180℃、4区温度为200℃、5区温度为200℃、6区温度为200℃、7区温度为200℃、机头温度为190℃、熔体温度为205℃、主机转速为280-300rpm;
4)将挤出物料经冷却、风干、切粒、干燥后装包入库。
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CN101691438A (zh) * | 2009-09-22 | 2010-04-07 | 广州市波斯塑胶颜料有限公司 | 一种abs色母粒 |
CN103865171A (zh) * | 2014-03-06 | 2014-06-18 | 抚顺易桂塑胶科技有限公司 | 一种pp耐寒增韧功能的色母粒及其制备方法 |
CN106046535A (zh) * | 2016-05-31 | 2016-10-26 | 上海金发科技发展有限公司 | 一种耐划伤聚丙烯复合物及其制备方法 |
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CN101691438A (zh) * | 2009-09-22 | 2010-04-07 | 广州市波斯塑胶颜料有限公司 | 一种abs色母粒 |
CN103865171A (zh) * | 2014-03-06 | 2014-06-18 | 抚顺易桂塑胶科技有限公司 | 一种pp耐寒增韧功能的色母粒及其制备方法 |
CN106046535A (zh) * | 2016-05-31 | 2016-10-26 | 上海金发科技发展有限公司 | 一种耐划伤聚丙烯复合物及其制备方法 |
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