CN112321986A - 一种高填充热塑性弹性体塑胶跑道材料的制备方法 - Google Patents
一种高填充热塑性弹性体塑胶跑道材料的制备方法 Download PDFInfo
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Abstract
本发明公开了一种高填充热塑性弹性体塑胶跑道材料的制备方法,首先将无机填料与原位表面改性剂按照质量分数比在高速混合机的常温条件下低速混合一定时间,然后加入一定量的LDPE/LLDPE和引发剂,混合一段时间后用双螺杆在一定温度下挤压初混成颗粒,得到核壳结构的无机填料母粒,然后用365‑410nm的紫外光或蓝光引发完成二次引发接枝,随后将热塑性弹体主基材与油剂在常温状态下进行混合,然后加入一定量的增强树脂与步骤二中所得到的核壳结构的无机填料母粒进行混合,然后利用双螺杆熔融混合后挤压出辊压成型得到高填充热塑性弹体塑胶跑道材料本发明的有益效果:具有优良的力学性能、阻燃性能、加工性能,柔软性、耐候性、耐油性、耐低温性等性能良好。
Description
技术领域
本发明涉及塑胶跑道材料技术领域,具体是一种高填充热塑性弹性体塑胶跑道材料的制备方法。
背景技术
在热塑性弹性体加入填料、助剂等制备的热塑性塑胶跑道材料具有质量稳定、力学性能优异、工艺成熟、价格适中、环保可回收等比较优势,在国内多个运动场地已获得推广应用。填料的添加既能节省树脂用量降低成本,又能改进基材的外观、力学、热性能、阻燃性能等,还能降低能量消耗和环境污染。工业上常用的填料主要是无机物,包括有碳酸钙、氧化锌、氧化镁/氢氧化镁、氧化铝/氢氧化铝等,这些无机物来源广泛、储量丰富、经济性好;加入这些填料的塑料广泛用于吹膜、拉丝、电缆等多个领域。在这些应用过程中最大的问题是填料的填充率不高,同时还存在相容性差、容易析出、力学性能劣化明显等问题,造成这些现象的原因是无机填料与热塑性弹性体之间的界面性能不匹配,工业上常规的解决方式是加入硬脂酸及其盐、马来酸酐接枝物等来调节界面极性改善二者之间的相容性,这种方法可以提高填充量,但程度有限,未能彻底的解决上述不足,充分发挥热塑性弹性体基材和无机填料各自优异的性能。
发明内容
本发明的目的在于提供一种高填充热塑性弹性体塑胶跑道材料的制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种高填充热塑性弹性体塑胶跑道材料的制备方法,包括以下步骤:
步骤一:准备原料,所述原料组成包括热塑性弹性体主基材、增强树脂、油剂、无机填料、原位表面改性剂;
步骤二:将无机填料与原位表面改性剂按照质量分数比在高速混合机的常温条件下低速混合一定时间,然后加入一定量的LDPE/LLDPE和引发剂,混合一段时间后用双螺杆在一定温度下挤压初混成颗粒,得到核壳结构的无机填料母粒,然后用365-410nm的紫外光或蓝光引发完成二次引发接枝;
步骤三:将热塑性弹体主基材与油剂在常温状态下进行混合,然后加入一定量的增强树脂与步骤二中所得到的核壳结构的无机填料母粒进行混合,然后利用双螺杆熔融混合后挤压出辊压成型得到高填充热塑性弹体塑胶跑道材料。
作为本发明进一步的方案:所述原料添加的分量均按照质量分数比进行添加,其中热塑性弹性体主基材80-120份、增强树脂100-150份、油剂100-300份、无机填料200-500份、原位表面改性剂10-20份。
作为本发明进一步的方案:所述热塑性弹性体主基材为SEBS/SEPS中的一种或两种的混合物,所述增强树脂为PP/POE/LDPE中的一种或数种的混合物;所述油剂为白油、环烷油中的一种或两种的混合物;所述无机填料为碳酸钙、氧化锌、氧化镁、氧化铝的一种或数种的混合物;所述原位表面改性剂为核壳结构LDPE/LLDPE的丙烯酸或甲基丙烯酸接枝物;所述引发剂为光、热引发剂的复配物。
作为本发明进一步的方案:所述无机填料与原位表面改性剂在20-60℃、10-300RMP的条件下先混合1-5 min,所述LDPE/LLDPE和引发剂再在20-60℃、10-300 RMP的条件下混合1-5 min,而后用双螺杆在60-120℃条件下挤出共混成粒状。
与现有技术相比,本发明的有益效果是:
1、利用丙烯酸、甲基丙烯酸等液态可聚合的表面改性剂在填料表面进行原位反应形成完整的包覆层,而后利用热和光引发接枝,得到以无机填料为核、接枝聚合物为壳的填料母粒;极性的羧基与填料表面的金属钙、镁、铝等离子形成强相互作用,现在填料核的表面形成完整的改性包覆层,与之相连的壳层接枝聚合物与后加入的热塑性弹性体基材因极性相近而发生分子量的缠结,可显著提高填料与基材之间的相容性,进一步提高力学性能、加工性能、柔软性、耐候性、耐油性、耐低温性等;
2、先制备核壳结构的填料母粒,而后加入基材、增强树脂、油剂等制备高填充热塑性弹性体塑胶跑道材料,填料以母料加二次熔融共混的过程最终分散在材料中,显著提高在最终产品中填料的分散状况,进一步提高材料的力学性能、性能的稳定性及综合物性。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例描述所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明所得高填充热塑性弹体塑胶跑道材料的主要技术指标。
具体实施方式
下面将结合本发明实施例中的附图,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。
一种高填充热塑性弹性体塑胶跑道材料的制备方法,包括以下步骤:
步骤一:准备原料,所述原料组成包括热塑性弹性体主基材、增强树脂、油剂、无机填料、原位表面改性剂;
步骤二:将无机填料与原位表面改性剂按照质量分数比在高速混合机的常温条件下低速混合一定时间,然后加入一定量的LDPE/LLDPE和引发剂,混合一段时间后用双螺杆在一定温度下挤压初混成颗粒,得到核壳结构的无机填料母粒,然后用365-410nm的紫外光或蓝光引发完成二次引发接枝;
步骤三:将热塑性弹体主基材与油剂在常温状态下进行混合,然后加入一定量的增强树脂与步骤二中所得到的核壳结构的无机填料母粒进行混合,然后利用双螺杆熔融混合后挤压出辊压成型得到高填充热塑性弹体塑胶跑道材料。
实施例一:
所述热塑性弹性体主基材100份、增强树脂100份、油剂100份、无机填料200份、原位表面改性剂10份;
其中所述热塑性弹性体主基材为SEPS(YH系列),所述增强树脂为PP(熔指1-5)中;所述油剂为白油;所述无机填料为20-200nm、0.5-3mm,5-20mm粒径范围的碳酸钙填料级配得到,三者的比例为1:3:6。所述原位表面改性剂为LDPE接枝丙烯酸或马来酸,所述引发剂为热引发剂(60-120℃范围)和光引发剂(365-410 nm波长范围)的复配物。
实施例二:
如图1所示,所述热塑性弹性体主基材100份、增强树脂150份、油剂300份、无机填料500份、原位表面改性剂20份;
其中所述热塑性弹性体主基材为SEBS(YH系列),所述增强树脂为HDPE(熔指1-5)中;所述油剂为环烷油;所述无机填料为20-200nm、0.5-3mm,5-20mm粒径范围的氧化铝填料级配得到,三者的比例为1:5:4。所述原位表面改性剂为LLDPE接枝马来酸。所述引发剂为热引发剂(60-120℃范围)和光引发剂(365-410 nm波长范围)的复配物。
实施例三:
所述热塑性弹性体主基材100份、增强树脂120份、油剂250份、无机填料500份、原位表面改性剂20份;
其中所述热塑性弹性体主基材为SEBS和SEPS的组合物(YH系列,比例不必特别限定),所述增强树脂为POE(熔指1-5)中;所述油剂为白油和环烷油组合物;所述无机填料为20-200nm、0.5-3mm,5-20mm粒径范围的氧化镁填料级配得到,三者的比例为1:4:5。所述原位表面改性剂为LLDPE接枝丙烯酸或马来酸的组合物。所述引发剂为热引发剂(60-120℃范围)和光引发剂(365-410 nm波长范围)的复配物。
实施例四:
所述热塑性弹性体主基材100份、增强树脂100份、油剂250份、无机填料400份、原位表面改性剂15份;
其中所述热塑性弹性体主基材为SEBS和SEPS的组合物(YH系列,比例不必特别限定),所述增强树脂为POE(熔指1-5)中;所述油剂为白油和环烷油组合物;所述无机填料为20-200nm、0.5-3mm,5-20mm粒径范围的碳酸钙和氧化锌组合填料级配得到(比例不必特殊限定),三者的比例为1:4:5。所述原位表面改性剂为LDPE和LLDPE接枝丙烯酸的组合物。所述引发剂为热引发剂(60-120℃范围)和光引发剂(365-410 nm波长范围)的复配物。
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。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (5)
1.一种高填充热塑性弹性体塑胶跑道材料的制备方法,其特征在于,包括以下步骤:步骤一:准备原料,所述原料组成包括热塑性弹性体主基材、增强树脂、油剂、无机填料、原位表面改性剂;
步骤二:将无机填料与原位表面改性剂按照质量分数比在高速混合机的常温条件下低速混合一定时间,然后加入一定量的LDPE/LLDPE和引发剂,混合一段时间后用双螺杆在一定温度下挤压初混成颗粒,得到核壳结构的无机填料母粒,然后用365-410nm的紫外光或蓝光引发完成二次引发接枝;
步骤三:将热塑性弹体主基材与油剂在常温状态下进行混合,然后加入一定量的增强树脂与步骤二中所得到的核壳结构的无机填料母粒进行混合,然后利用双螺杆熔融混合后挤压出辊压成型得到高填充热塑性弹体塑胶跑道材料。
2.根据权利要求1所述的一种高填充热塑性弹性体塑胶跑道材料的制备方法,其特征在于:所述原料添加的分量均按照质量分数比进行添加,其中热塑性弹性体主基材80-120份、增强树脂100-150份、油剂100-300份、无机填料200-500份、原位表面改性剂10-20份。
3.根据权利要求1所述的一种高填充热塑性弹性体塑胶跑道材料的制备方法,其特征在于:所述热塑性弹性体主基材为SEBS/SEPS中的一种或两种的混合物,所述增强树脂为PP/POE/LDPE中的一种或数种的混合物;所述油剂为白油、环烷油中的一种或两种的混合物;所述无机填料为碳酸钙、氧化锌、氧化镁、氧化铝的一种或数种的混合物;所述原位表面改性剂为核壳结构LDPE/LLDPE的丙烯酸或甲基丙烯酸接枝物;所述引发剂为光、热引发剂的复配物。
4.根据权利要求1所述的一种高填充热塑性弹性体塑胶跑道材料的制备方法,其特征在于:所述无机填料与原位表面改性剂在20-60℃、10-300 RMP的条件下先混合1-5 min,所述LDPE/LLDPE和引发剂再在20-60℃、10-300 RMP的条件下混合1-5 min,而后用双螺杆在60-120℃条件下挤出共混成粒状。
5.根据权利要求1所述的一种高填充热塑性弹性体塑胶跑道材料的制备方法,其特征在于:所述无机填料是用20-200 nm、0.5-3 mm,5-20 mm粒径范围的填料级配得到,三者的比例在1:3-5:6-4范围内可调。
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